2005-10-05 22:06:20 -04:00
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/*
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* Procedures for interfacing to Open Firmware.
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*
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* Paul Mackerras August 1996.
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* Copyright (C) 1996-2005 Paul Mackerras.
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*
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* Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
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* {engebret|bergner}@us.ibm.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#undef DEBUG_PROM
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#include <stdarg.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/threads.h>
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#include <linux/spinlock.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/proc_fs.h>
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#include <linux/stringify.h>
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#include <linux/delay.h>
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#include <linux/initrd.h>
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#include <linux/bitops.h>
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#include <asm/prom.h>
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#include <asm/rtas.h>
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#include <asm/page.h>
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#include <asm/processor.h>
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#include <asm/irq.h>
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#include <asm/io.h>
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#include <asm/smp.h>
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#include <asm/system.h>
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#include <asm/mmu.h>
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#include <asm/pgtable.h>
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#include <asm/pci.h>
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#include <asm/iommu.h>
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#include <asm/btext.h>
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#include <asm/sections.h>
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#include <asm/machdep.h>
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#ifdef CONFIG_LOGO_LINUX_CLUT224
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#include <linux/linux_logo.h>
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extern const struct linux_logo logo_linux_clut224;
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#endif
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/*
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* Properties whose value is longer than this get excluded from our
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* copy of the device tree. This value does need to be big enough to
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* ensure that we don't lose things like the interrupt-map property
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* on a PCI-PCI bridge.
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*/
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#define MAX_PROPERTY_LENGTH (1UL * 1024 * 1024)
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/*
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* Eventually bump that one up
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*/
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#define DEVTREE_CHUNK_SIZE 0x100000
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/*
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* This is the size of the local memory reserve map that gets copied
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* into the boot params passed to the kernel. That size is totally
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* flexible as the kernel just reads the list until it encounters an
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* entry with size 0, so it can be changed without breaking binary
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* compatibility
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*/
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#define MEM_RESERVE_MAP_SIZE 8
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/*
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* prom_init() is called very early on, before the kernel text
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* and data have been mapped to KERNELBASE. At this point the code
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* is running at whatever address it has been loaded at.
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* On ppc32 we compile with -mrelocatable, which means that references
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* to extern and static variables get relocated automatically.
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* On ppc64 we have to relocate the references explicitly with
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* RELOC. (Note that strings count as static variables.)
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*
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* Because OF may have mapped I/O devices into the area starting at
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* KERNELBASE, particularly on CHRP machines, we can't safely call
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* OF once the kernel has been mapped to KERNELBASE. Therefore all
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* OF calls must be done within prom_init().
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*
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* ADDR is used in calls to call_prom. The 4th and following
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* arguments to call_prom should be 32-bit values.
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* On ppc64, 64 bit values are truncated to 32 bits (and
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* fortunately don't get interpreted as two arguments).
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*/
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#ifdef CONFIG_PPC64
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#define RELOC(x) (*PTRRELOC(&(x)))
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#define ADDR(x) (u32) add_reloc_offset((unsigned long)(x))
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2005-11-09 20:00:55 -05:00
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#define OF_WORKAROUNDS 0
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2005-10-05 22:06:20 -04:00
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#else
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#define RELOC(x) (x)
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#define ADDR(x) (u32) (x)
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2005-11-09 20:00:55 -05:00
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#define OF_WORKAROUNDS of_workarounds
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int of_workarounds;
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2005-10-05 22:06:20 -04:00
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#endif
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2005-11-09 20:00:55 -05:00
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#define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
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#define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
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2005-10-05 22:06:20 -04:00
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#define PROM_BUG() do { \
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prom_printf("kernel BUG at %s line 0x%x!\n", \
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RELOC(__FILE__), __LINE__); \
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__asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \
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} while (0)
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#ifdef DEBUG_PROM
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#define prom_debug(x...) prom_printf(x)
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#else
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#define prom_debug(x...)
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#endif
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typedef u32 prom_arg_t;
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struct prom_args {
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u32 service;
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u32 nargs;
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u32 nret;
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prom_arg_t args[10];
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};
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struct prom_t {
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ihandle root;
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2005-11-09 20:00:55 -05:00
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phandle chosen;
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2005-10-05 22:06:20 -04:00
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int cpu;
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ihandle stdout;
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2005-10-23 03:23:21 -04:00
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ihandle mmumap;
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2005-11-09 20:00:55 -05:00
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ihandle memory;
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2005-10-05 22:06:20 -04:00
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};
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struct mem_map_entry {
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2006-01-11 18:57:13 -05:00
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u64 base;
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u64 size;
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2005-10-05 22:06:20 -04:00
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};
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typedef u32 cell_t;
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extern void __start(unsigned long r3, unsigned long r4, unsigned long r5);
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#ifdef CONFIG_PPC64
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2005-10-26 07:52:53 -04:00
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extern int enter_prom(struct prom_args *args, unsigned long entry);
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2005-10-05 22:06:20 -04:00
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#else
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2005-10-26 07:52:53 -04:00
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static inline int enter_prom(struct prom_args *args, unsigned long entry)
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2005-10-05 22:06:20 -04:00
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{
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2005-10-26 07:52:53 -04:00
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return ((int (*)(struct prom_args *))entry)(args);
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2005-10-05 22:06:20 -04:00
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}
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#endif
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extern void copy_and_flush(unsigned long dest, unsigned long src,
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unsigned long size, unsigned long offset);
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/* prom structure */
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static struct prom_t __initdata prom;
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static unsigned long prom_entry __initdata;
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#define PROM_SCRATCH_SIZE 256
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static char __initdata of_stdout_device[256];
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static char __initdata prom_scratch[PROM_SCRATCH_SIZE];
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static unsigned long __initdata dt_header_start;
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static unsigned long __initdata dt_struct_start, dt_struct_end;
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static unsigned long __initdata dt_string_start, dt_string_end;
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static unsigned long __initdata prom_initrd_start, prom_initrd_end;
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#ifdef CONFIG_PPC64
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2006-11-11 01:25:18 -05:00
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static int __initdata prom_iommu_force_on;
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static int __initdata prom_iommu_off;
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2005-10-05 22:06:20 -04:00
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static unsigned long __initdata prom_tce_alloc_start;
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static unsigned long __initdata prom_tce_alloc_end;
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#endif
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2006-03-28 07:15:54 -05:00
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/* Platforms codes are now obsolete in the kernel. Now only used within this
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* file and ultimately gone too. Feel free to change them if you need, they
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* are not shared with anything outside of this file anymore
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*/
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#define PLATFORM_PSERIES 0x0100
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#define PLATFORM_PSERIES_LPAR 0x0101
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#define PLATFORM_LPAR 0x0001
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#define PLATFORM_POWERMAC 0x0400
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#define PLATFORM_GENERIC 0x0500
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2005-10-05 22:06:20 -04:00
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static int __initdata of_platform;
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static char __initdata prom_cmd_line[COMMAND_LINE_SIZE];
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static unsigned long __initdata alloc_top;
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static unsigned long __initdata alloc_top_high;
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static unsigned long __initdata alloc_bottom;
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static unsigned long __initdata rmo_top;
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static unsigned long __initdata ram_top;
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static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE];
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static int __initdata mem_reserve_cnt;
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static cell_t __initdata regbuf[1024];
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#define MAX_CPU_THREADS 2
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/*
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* Error results ... some OF calls will return "-1" on error, some
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* will return 0, some will return either. To simplify, here are
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* macros to use with any ihandle or phandle return value to check if
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* it is valid
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*/
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#define PROM_ERROR (-1u)
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#define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
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#define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
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/* This is the one and *ONLY* place where we actually call open
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* firmware.
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*/
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static int __init call_prom(const char *service, int nargs, int nret, ...)
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{
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int i;
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struct prom_args args;
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va_list list;
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args.service = ADDR(service);
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args.nargs = nargs;
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args.nret = nret;
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va_start(list, nret);
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for (i = 0; i < nargs; i++)
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args.args[i] = va_arg(list, prom_arg_t);
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va_end(list);
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for (i = 0; i < nret; i++)
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args.args[nargs+i] = 0;
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2005-10-26 07:52:53 -04:00
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if (enter_prom(&args, RELOC(prom_entry)) < 0)
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return PROM_ERROR;
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2005-10-05 22:06:20 -04:00
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return (nret > 0) ? args.args[nargs] : 0;
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}
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static int __init call_prom_ret(const char *service, int nargs, int nret,
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prom_arg_t *rets, ...)
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{
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int i;
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struct prom_args args;
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va_list list;
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args.service = ADDR(service);
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args.nargs = nargs;
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args.nret = nret;
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va_start(list, rets);
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for (i = 0; i < nargs; i++)
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args.args[i] = va_arg(list, prom_arg_t);
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va_end(list);
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for (i = 0; i < nret; i++)
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2005-11-29 08:04:05 -05:00
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args.args[nargs+i] = 0;
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2005-10-05 22:06:20 -04:00
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2005-10-26 07:52:53 -04:00
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if (enter_prom(&args, RELOC(prom_entry)) < 0)
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return PROM_ERROR;
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2005-10-05 22:06:20 -04:00
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if (rets != NULL)
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for (i = 1; i < nret; ++i)
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2005-10-10 08:57:03 -04:00
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rets[i-1] = args.args[nargs+i];
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2005-10-05 22:06:20 -04:00
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return (nret > 0) ? args.args[nargs] : 0;
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}
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static void __init prom_print(const char *msg)
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{
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const char *p, *q;
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struct prom_t *_prom = &RELOC(prom);
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if (_prom->stdout == 0)
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return;
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for (p = msg; *p != 0; p = q) {
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for (q = p; *q != 0 && *q != '\n'; ++q)
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;
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if (q > p)
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call_prom("write", 3, 1, _prom->stdout, p, q - p);
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if (*q == 0)
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break;
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++q;
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call_prom("write", 3, 1, _prom->stdout, ADDR("\r\n"), 2);
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}
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}
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static void __init prom_print_hex(unsigned long val)
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{
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int i, nibbles = sizeof(val)*2;
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char buf[sizeof(val)*2+1];
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struct prom_t *_prom = &RELOC(prom);
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for (i = nibbles-1; i >= 0; i--) {
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buf[i] = (val & 0xf) + '0';
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if (buf[i] > '9')
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buf[i] += ('a'-'0'-10);
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val >>= 4;
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}
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buf[nibbles] = '\0';
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call_prom("write", 3, 1, _prom->stdout, buf, nibbles);
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}
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static void __init prom_printf(const char *format, ...)
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{
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const char *p, *q, *s;
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va_list args;
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unsigned long v;
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struct prom_t *_prom = &RELOC(prom);
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va_start(args, format);
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#ifdef CONFIG_PPC64
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format = PTRRELOC(format);
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#endif
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for (p = format; *p != 0; p = q) {
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for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
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;
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if (q > p)
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call_prom("write", 3, 1, _prom->stdout, p, q - p);
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if (*q == 0)
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break;
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if (*q == '\n') {
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++q;
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call_prom("write", 3, 1, _prom->stdout,
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ADDR("\r\n"), 2);
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continue;
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}
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++q;
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if (*q == 0)
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break;
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switch (*q) {
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case 's':
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++q;
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s = va_arg(args, const char *);
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prom_print(s);
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break;
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case 'x':
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++q;
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v = va_arg(args, unsigned long);
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prom_print_hex(v);
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break;
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}
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}
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}
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|
|
|
|
|
2005-10-23 03:23:21 -04:00
|
|
|
static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
|
|
|
|
unsigned long align)
|
|
|
|
{
|
|
|
|
struct prom_t *_prom = &RELOC(prom);
|
|
|
|
|
2005-11-09 20:00:55 -05:00
|
|
|
if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) {
|
|
|
|
/*
|
|
|
|
* Old OF requires we claim physical and virtual separately
|
|
|
|
* and then map explicitly (assuming virtual mode)
|
|
|
|
*/
|
|
|
|
int ret;
|
|
|
|
prom_arg_t result;
|
|
|
|
|
|
|
|
ret = call_prom_ret("call-method", 5, 2, &result,
|
|
|
|
ADDR("claim"), _prom->memory,
|
|
|
|
align, size, virt);
|
|
|
|
if (ret != 0 || result == -1)
|
|
|
|
return -1;
|
|
|
|
ret = call_prom_ret("call-method", 5, 2, &result,
|
|
|
|
ADDR("claim"), _prom->mmumap,
|
|
|
|
align, size, virt);
|
|
|
|
if (ret != 0) {
|
|
|
|
call_prom("call-method", 4, 1, ADDR("release"),
|
|
|
|
_prom->memory, size, virt);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
/* the 0x12 is M (coherence) + PP == read/write */
|
2005-10-23 03:23:21 -04:00
|
|
|
call_prom("call-method", 6, 1,
|
2005-11-09 20:00:55 -05:00
|
|
|
ADDR("map"), _prom->mmumap, 0x12, size, virt, virt);
|
|
|
|
return virt;
|
|
|
|
}
|
|
|
|
return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
|
|
|
|
(prom_arg_t)align);
|
2005-10-23 03:23:21 -04:00
|
|
|
}
|
|
|
|
|
2005-10-05 22:06:20 -04:00
|
|
|
static void __init __attribute__((noreturn)) prom_panic(const char *reason)
|
|
|
|
{
|
|
|
|
#ifdef CONFIG_PPC64
|
|
|
|
reason = PTRRELOC(reason);
|
|
|
|
#endif
|
|
|
|
prom_print(reason);
|
2006-03-23 16:03:57 -05:00
|
|
|
/* Do not call exit because it clears the screen on pmac
|
|
|
|
* it also causes some sort of double-fault on early pmacs */
|
|
|
|
if (RELOC(of_platform) == PLATFORM_POWERMAC)
|
|
|
|
asm("trap\n");
|
|
|
|
|
2005-10-05 22:06:20 -04:00
|
|
|
/* ToDo: should put up an SRC here on p/iSeries */
|
|
|
|
call_prom("exit", 0, 0);
|
|
|
|
|
|
|
|
for (;;) /* should never get here */
|
|
|
|
;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static int __init prom_next_node(phandle *nodep)
|
|
|
|
{
|
|
|
|
phandle node;
|
|
|
|
|
|
|
|
if ((node = *nodep) != 0
|
|
|
|
&& (*nodep = call_prom("child", 1, 1, node)) != 0)
|
|
|
|
return 1;
|
|
|
|
if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
|
|
|
|
return 1;
|
|
|
|
for (;;) {
|
|
|
|
if ((node = call_prom("parent", 1, 1, node)) == 0)
|
|
|
|
return 0;
|
|
|
|
if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-11-07 00:41:59 -05:00
|
|
|
static int inline prom_getprop(phandle node, const char *pname,
|
2005-10-05 22:06:20 -04:00
|
|
|
void *value, size_t valuelen)
|
|
|
|
{
|
|
|
|
return call_prom("getprop", 4, 1, node, ADDR(pname),
|
|
|
|
(u32)(unsigned long) value, (u32) valuelen);
|
|
|
|
}
|
|
|
|
|
2005-11-07 00:41:59 -05:00
|
|
|
static int inline prom_getproplen(phandle node, const char *pname)
|
2005-10-05 22:06:20 -04:00
|
|
|
{
|
|
|
|
return call_prom("getproplen", 2, 1, node, ADDR(pname));
|
|
|
|
}
|
|
|
|
|
2005-11-09 20:00:55 -05:00
|
|
|
static void add_string(char **str, const char *q)
|
2005-10-05 22:06:20 -04:00
|
|
|
{
|
2005-11-09 20:00:55 -05:00
|
|
|
char *p = *str;
|
|
|
|
|
|
|
|
while (*q)
|
|
|
|
*p++ = *q++;
|
|
|
|
*p++ = ' ';
|
|
|
|
*str = p;
|
|
|
|
}
|
|
|
|
|
|
|
|
static char *tohex(unsigned int x)
|
|
|
|
{
|
|
|
|
static char digits[] = "0123456789abcdef";
|
|
|
|
static char result[9];
|
|
|
|
int i;
|
|
|
|
|
|
|
|
result[8] = 0;
|
|
|
|
i = 8;
|
|
|
|
do {
|
|
|
|
--i;
|
|
|
|
result[i] = digits[x & 0xf];
|
|
|
|
x >>= 4;
|
|
|
|
} while (x != 0 && i > 0);
|
|
|
|
return &result[i];
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __init prom_setprop(phandle node, const char *nodename,
|
|
|
|
const char *pname, void *value, size_t valuelen)
|
|
|
|
{
|
|
|
|
char cmd[256], *p;
|
|
|
|
|
|
|
|
if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL))
|
|
|
|
return call_prom("setprop", 4, 1, node, ADDR(pname),
|
|
|
|
(u32)(unsigned long) value, (u32) valuelen);
|
|
|
|
|
|
|
|
/* gah... setprop doesn't work on longtrail, have to use interpret */
|
|
|
|
p = cmd;
|
|
|
|
add_string(&p, "dev");
|
|
|
|
add_string(&p, nodename);
|
|
|
|
add_string(&p, tohex((u32)(unsigned long) value));
|
|
|
|
add_string(&p, tohex(valuelen));
|
|
|
|
add_string(&p, tohex(ADDR(pname)));
|
|
|
|
add_string(&p, tohex(strlen(RELOC(pname))));
|
|
|
|
add_string(&p, "property");
|
|
|
|
*p = 0;
|
|
|
|
return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
|
2005-10-05 22:06:20 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
/* We can't use the standard versions because of RELOC headaches. */
|
|
|
|
#define isxdigit(c) (('0' <= (c) && (c) <= '9') \
|
|
|
|
|| ('a' <= (c) && (c) <= 'f') \
|
|
|
|
|| ('A' <= (c) && (c) <= 'F'))
|
|
|
|
|
|
|
|
#define isdigit(c) ('0' <= (c) && (c) <= '9')
|
|
|
|
#define islower(c) ('a' <= (c) && (c) <= 'z')
|
|
|
|
#define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
|
|
|
|
|
|
|
|
unsigned long prom_strtoul(const char *cp, const char **endp)
|
|
|
|
{
|
|
|
|
unsigned long result = 0, base = 10, value;
|
|
|
|
|
|
|
|
if (*cp == '0') {
|
|
|
|
base = 8;
|
|
|
|
cp++;
|
|
|
|
if (toupper(*cp) == 'X') {
|
|
|
|
cp++;
|
|
|
|
base = 16;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
while (isxdigit(*cp) &&
|
|
|
|
(value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) {
|
|
|
|
result = result * base + value;
|
|
|
|
cp++;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (endp)
|
|
|
|
*endp = cp;
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
unsigned long prom_memparse(const char *ptr, const char **retptr)
|
|
|
|
{
|
|
|
|
unsigned long ret = prom_strtoul(ptr, retptr);
|
|
|
|
int shift = 0;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We can't use a switch here because GCC *may* generate a
|
|
|
|
* jump table which won't work, because we're not running at
|
|
|
|
* the address we're linked at.
|
|
|
|
*/
|
|
|
|
if ('G' == **retptr || 'g' == **retptr)
|
|
|
|
shift = 30;
|
|
|
|
|
|
|
|
if ('M' == **retptr || 'm' == **retptr)
|
|
|
|
shift = 20;
|
|
|
|
|
|
|
|
if ('K' == **retptr || 'k' == **retptr)
|
|
|
|
shift = 10;
|
|
|
|
|
|
|
|
if (shift) {
|
|
|
|
ret <<= shift;
|
|
|
|
(*retptr)++;
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Early parsing of the command line passed to the kernel, used for
|
|
|
|
* "mem=x" and the options that affect the iommu
|
|
|
|
*/
|
|
|
|
static void __init early_cmdline_parse(void)
|
|
|
|
{
|
|
|
|
struct prom_t *_prom = &RELOC(prom);
|
2006-07-04 00:07:42 -04:00
|
|
|
#ifdef CONFIG_PPC64
|
2005-12-13 02:01:21 -05:00
|
|
|
const char *opt;
|
2006-07-04 00:07:42 -04:00
|
|
|
#endif
|
2005-12-13 02:01:21 -05:00
|
|
|
char *p;
|
2005-10-05 22:06:20 -04:00
|
|
|
int l = 0;
|
|
|
|
|
|
|
|
RELOC(prom_cmd_line[0]) = 0;
|
|
|
|
p = RELOC(prom_cmd_line);
|
|
|
|
if ((long)_prom->chosen > 0)
|
|
|
|
l = prom_getprop(_prom->chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
|
|
|
|
#ifdef CONFIG_CMDLINE
|
2006-06-12 23:45:02 -04:00
|
|
|
if (l <= 0 || p[0] == '\0') /* dbl check */
|
2005-10-05 22:06:20 -04:00
|
|
|
strlcpy(RELOC(prom_cmd_line),
|
|
|
|
RELOC(CONFIG_CMDLINE), sizeof(prom_cmd_line));
|
|
|
|
#endif /* CONFIG_CMDLINE */
|
|
|
|
prom_printf("command line: %s\n", RELOC(prom_cmd_line));
|
|
|
|
|
|
|
|
#ifdef CONFIG_PPC64
|
|
|
|
opt = strstr(RELOC(prom_cmd_line), RELOC("iommu="));
|
|
|
|
if (opt) {
|
|
|
|
prom_printf("iommu opt is: %s\n", opt);
|
|
|
|
opt += 6;
|
|
|
|
while (*opt && *opt == ' ')
|
|
|
|
opt++;
|
|
|
|
if (!strncmp(opt, RELOC("off"), 3))
|
2006-11-11 01:25:18 -05:00
|
|
|
RELOC(prom_iommu_off) = 1;
|
2005-10-05 22:06:20 -04:00
|
|
|
else if (!strncmp(opt, RELOC("force"), 5))
|
2006-11-11 01:25:18 -05:00
|
|
|
RELOC(prom_iommu_force_on) = 1;
|
2005-10-05 22:06:20 -04:00
|
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_PPC_PSERIES
|
|
|
|
/*
|
2006-04-28 02:28:35 -04:00
|
|
|
* There are two methods for telling firmware what our capabilities are.
|
|
|
|
* Newer machines have an "ibm,client-architecture-support" method on the
|
|
|
|
* root node. For older machines, we have to call the "process-elf-header"
|
|
|
|
* method in the /packages/elf-loader node, passing it a fake 32-bit
|
|
|
|
* ELF header containing a couple of PT_NOTE sections that contain
|
|
|
|
* structures that contain various information.
|
2005-10-05 22:06:20 -04:00
|
|
|
*/
|
2006-04-28 02:28:35 -04:00
|
|
|
|
|
|
|
/*
|
|
|
|
* New method - extensible architecture description vector.
|
|
|
|
*
|
|
|
|
* Because the description vector contains a mix of byte and word
|
|
|
|
* values, we declare it as an unsigned char array, and use this
|
|
|
|
* macro to put word values in.
|
|
|
|
*/
|
|
|
|
#define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \
|
|
|
|
((x) >> 8) & 0xff, (x) & 0xff
|
|
|
|
|
|
|
|
/* Option vector bits - generic bits in byte 1 */
|
|
|
|
#define OV_IGNORE 0x80 /* ignore this vector */
|
|
|
|
#define OV_CESSATION_POLICY 0x40 /* halt if unsupported option present*/
|
|
|
|
|
|
|
|
/* Option vector 1: processor architectures supported */
|
|
|
|
#define OV1_PPC_2_00 0x80 /* set if we support PowerPC 2.00 */
|
|
|
|
#define OV1_PPC_2_01 0x40 /* set if we support PowerPC 2.01 */
|
|
|
|
#define OV1_PPC_2_02 0x20 /* set if we support PowerPC 2.02 */
|
|
|
|
#define OV1_PPC_2_03 0x10 /* set if we support PowerPC 2.03 */
|
|
|
|
#define OV1_PPC_2_04 0x08 /* set if we support PowerPC 2.04 */
|
|
|
|
#define OV1_PPC_2_05 0x04 /* set if we support PowerPC 2.05 */
|
|
|
|
|
|
|
|
/* Option vector 2: Open Firmware options supported */
|
|
|
|
#define OV2_REAL_MODE 0x20 /* set if we want OF in real mode */
|
|
|
|
|
|
|
|
/* Option vector 3: processor options supported */
|
|
|
|
#define OV3_FP 0x80 /* floating point */
|
|
|
|
#define OV3_VMX 0x40 /* VMX/Altivec */
|
2006-11-10 04:38:53 -05:00
|
|
|
#define OV3_DFP 0x20 /* decimal FP */
|
2006-04-28 02:28:35 -04:00
|
|
|
|
|
|
|
/* Option vector 5: PAPR/OF options supported */
|
|
|
|
#define OV5_LPAR 0x80 /* logical partitioning supported */
|
|
|
|
#define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */
|
|
|
|
/* ibm,dynamic-reconfiguration-memory property supported */
|
|
|
|
#define OV5_DRCONF_MEMORY 0x20
|
|
|
|
#define OV5_LARGE_PAGES 0x10 /* large pages supported */
|
2007-06-07 17:27:11 -04:00
|
|
|
#define OV5_DONATE_DEDICATE_CPU 0x02 /* donate dedicated CPU support */
|
2007-05-07 22:58:35 -04:00
|
|
|
/* PCIe/MSI support. Without MSI full PCIe is not supported */
|
|
|
|
#ifdef CONFIG_PCI_MSI
|
|
|
|
#define OV5_MSI 0x01 /* PCIe/MSI support */
|
|
|
|
#else
|
|
|
|
#define OV5_MSI 0x00
|
|
|
|
#endif /* CONFIG_PCI_MSI */
|
2006-04-28 02:28:35 -04:00
|
|
|
|
|
|
|
/*
|
|
|
|
* The architecture vector has an array of PVR mask/value pairs,
|
|
|
|
* followed by # option vectors - 1, followed by the option vectors.
|
|
|
|
*/
|
|
|
|
static unsigned char ibm_architecture_vec[] = {
|
|
|
|
W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */
|
2006-04-28 19:51:06 -04:00
|
|
|
W(0xffff0000), W(0x003e0000), /* POWER6 */
|
2006-11-29 06:31:47 -05:00
|
|
|
W(0xffffffff), W(0x0f000002), /* all 2.05-compliant */
|
2006-04-28 02:28:35 -04:00
|
|
|
W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */
|
|
|
|
5 - 1, /* 5 option vectors */
|
|
|
|
|
|
|
|
/* option vector 1: processor architectures supported */
|
2006-08-25 16:46:59 -04:00
|
|
|
3 - 2, /* length */
|
2006-04-28 02:28:35 -04:00
|
|
|
0, /* don't ignore, don't halt */
|
|
|
|
OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
|
|
|
|
OV1_PPC_2_04 | OV1_PPC_2_05,
|
|
|
|
|
|
|
|
/* option vector 2: Open Firmware options supported */
|
2006-08-25 16:46:59 -04:00
|
|
|
34 - 2, /* length */
|
2006-04-28 02:28:35 -04:00
|
|
|
OV2_REAL_MODE,
|
|
|
|
0, 0,
|
|
|
|
W(0xffffffff), /* real_base */
|
|
|
|
W(0xffffffff), /* real_size */
|
|
|
|
W(0xffffffff), /* virt_base */
|
|
|
|
W(0xffffffff), /* virt_size */
|
|
|
|
W(0xffffffff), /* load_base */
|
|
|
|
W(64), /* 128MB min RMA */
|
|
|
|
W(0xffffffff), /* full client load */
|
|
|
|
0, /* min RMA percentage of total RAM */
|
|
|
|
48, /* max log_2(hash table size) */
|
|
|
|
|
|
|
|
/* option vector 3: processor options supported */
|
2006-08-25 16:46:59 -04:00
|
|
|
3 - 2, /* length */
|
2006-04-28 02:28:35 -04:00
|
|
|
0, /* don't ignore, don't halt */
|
2006-11-10 04:38:53 -05:00
|
|
|
OV3_FP | OV3_VMX | OV3_DFP,
|
2006-04-28 02:28:35 -04:00
|
|
|
|
|
|
|
/* option vector 4: IBM PAPR implementation */
|
2006-08-25 16:46:59 -04:00
|
|
|
2 - 2, /* length */
|
2006-04-28 02:28:35 -04:00
|
|
|
0, /* don't halt */
|
|
|
|
|
|
|
|
/* option vector 5: PAPR/OF options */
|
2006-08-25 16:46:59 -04:00
|
|
|
3 - 2, /* length */
|
2006-04-28 02:28:35 -04:00
|
|
|
0, /* don't ignore, don't halt */
|
2007-06-07 17:27:11 -04:00
|
|
|
OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES | OV5_DRCONF_MEMORY |
|
|
|
|
OV5_DONATE_DEDICATE_CPU | OV5_MSI,
|
2006-04-28 02:28:35 -04:00
|
|
|
};
|
|
|
|
|
|
|
|
/* Old method - ELF header with PT_NOTE sections */
|
2005-10-05 22:06:20 -04:00
|
|
|
static struct fake_elf {
|
|
|
|
Elf32_Ehdr elfhdr;
|
|
|
|
Elf32_Phdr phdr[2];
|
|
|
|
struct chrpnote {
|
|
|
|
u32 namesz;
|
|
|
|
u32 descsz;
|
|
|
|
u32 type;
|
|
|
|
char name[8]; /* "PowerPC" */
|
|
|
|
struct chrpdesc {
|
|
|
|
u32 real_mode;
|
|
|
|
u32 real_base;
|
|
|
|
u32 real_size;
|
|
|
|
u32 virt_base;
|
|
|
|
u32 virt_size;
|
|
|
|
u32 load_base;
|
|
|
|
} chrpdesc;
|
|
|
|
} chrpnote;
|
|
|
|
struct rpanote {
|
|
|
|
u32 namesz;
|
|
|
|
u32 descsz;
|
|
|
|
u32 type;
|
|
|
|
char name[24]; /* "IBM,RPA-Client-Config" */
|
|
|
|
struct rpadesc {
|
|
|
|
u32 lpar_affinity;
|
|
|
|
u32 min_rmo_size;
|
|
|
|
u32 min_rmo_percent;
|
|
|
|
u32 max_pft_size;
|
|
|
|
u32 splpar;
|
|
|
|
u32 min_load;
|
|
|
|
u32 new_mem_def;
|
|
|
|
u32 ignore_me;
|
|
|
|
} rpadesc;
|
|
|
|
} rpanote;
|
|
|
|
} fake_elf = {
|
|
|
|
.elfhdr = {
|
|
|
|
.e_ident = { 0x7f, 'E', 'L', 'F',
|
|
|
|
ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
|
|
|
|
.e_type = ET_EXEC, /* yeah right */
|
|
|
|
.e_machine = EM_PPC,
|
|
|
|
.e_version = EV_CURRENT,
|
|
|
|
.e_phoff = offsetof(struct fake_elf, phdr),
|
|
|
|
.e_phentsize = sizeof(Elf32_Phdr),
|
|
|
|
.e_phnum = 2
|
|
|
|
},
|
|
|
|
.phdr = {
|
|
|
|
[0] = {
|
|
|
|
.p_type = PT_NOTE,
|
|
|
|
.p_offset = offsetof(struct fake_elf, chrpnote),
|
|
|
|
.p_filesz = sizeof(struct chrpnote)
|
|
|
|
}, [1] = {
|
|
|
|
.p_type = PT_NOTE,
|
|
|
|
.p_offset = offsetof(struct fake_elf, rpanote),
|
|
|
|
.p_filesz = sizeof(struct rpanote)
|
|
|
|
}
|
|
|
|
},
|
|
|
|
.chrpnote = {
|
|
|
|
.namesz = sizeof("PowerPC"),
|
|
|
|
.descsz = sizeof(struct chrpdesc),
|
|
|
|
.type = 0x1275,
|
|
|
|
.name = "PowerPC",
|
|
|
|
.chrpdesc = {
|
|
|
|
.real_mode = ~0U, /* ~0 means "don't care" */
|
|
|
|
.real_base = ~0U,
|
|
|
|
.real_size = ~0U,
|
|
|
|
.virt_base = ~0U,
|
|
|
|
.virt_size = ~0U,
|
|
|
|
.load_base = ~0U
|
|
|
|
},
|
|
|
|
},
|
|
|
|
.rpanote = {
|
|
|
|
.namesz = sizeof("IBM,RPA-Client-Config"),
|
|
|
|
.descsz = sizeof(struct rpadesc),
|
|
|
|
.type = 0x12759999,
|
|
|
|
.name = "IBM,RPA-Client-Config",
|
|
|
|
.rpadesc = {
|
|
|
|
.lpar_affinity = 0,
|
|
|
|
.min_rmo_size = 64, /* in megabytes */
|
|
|
|
.min_rmo_percent = 0,
|
|
|
|
.max_pft_size = 48, /* 2^48 bytes max PFT size */
|
|
|
|
.splpar = 1,
|
|
|
|
.min_load = ~0U,
|
|
|
|
.new_mem_def = 0
|
|
|
|
}
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
static void __init prom_send_capabilities(void)
|
|
|
|
{
|
2006-04-28 02:28:35 -04:00
|
|
|
ihandle elfloader, root;
|
|
|
|
prom_arg_t ret;
|
|
|
|
|
|
|
|
root = call_prom("open", 1, 1, ADDR("/"));
|
|
|
|
if (root != 0) {
|
|
|
|
/* try calling the ibm,client-architecture-support method */
|
|
|
|
if (call_prom_ret("call-method", 3, 2, &ret,
|
|
|
|
ADDR("ibm,client-architecture-support"),
|
2006-06-06 22:01:32 -04:00
|
|
|
root,
|
2006-04-28 02:28:35 -04:00
|
|
|
ADDR(ibm_architecture_vec)) == 0) {
|
|
|
|
/* the call exists... */
|
|
|
|
if (ret)
|
|
|
|
prom_printf("WARNING: ibm,client-architecture"
|
|
|
|
"-support call FAILED!\n");
|
|
|
|
call_prom("close", 1, 0, root);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
call_prom("close", 1, 0, root);
|
|
|
|
}
|
2005-10-05 22:06:20 -04:00
|
|
|
|
2006-04-28 02:28:35 -04:00
|
|
|
/* no ibm,client-architecture-support call, try the old way */
|
2005-10-05 22:06:20 -04:00
|
|
|
elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader"));
|
|
|
|
if (elfloader == 0) {
|
|
|
|
prom_printf("couldn't open /packages/elf-loader\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
call_prom("call-method", 3, 1, ADDR("process-elf-header"),
|
|
|
|
elfloader, ADDR(&fake_elf));
|
|
|
|
call_prom("close", 1, 0, elfloader);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Memory allocation strategy... our layout is normally:
|
|
|
|
*
|
|
|
|
* at 14Mb or more we have vmlinux, then a gap and initrd. In some
|
|
|
|
* rare cases, initrd might end up being before the kernel though.
|
|
|
|
* We assume this won't override the final kernel at 0, we have no
|
|
|
|
* provision to handle that in this version, but it should hopefully
|
|
|
|
* never happen.
|
|
|
|
*
|
|
|
|
* alloc_top is set to the top of RMO, eventually shrink down if the
|
|
|
|
* TCEs overlap
|
|
|
|
*
|
|
|
|
* alloc_bottom is set to the top of kernel/initrd
|
|
|
|
*
|
|
|
|
* from there, allocations are done this way : rtas is allocated
|
|
|
|
* topmost, and the device-tree is allocated from the bottom. We try
|
|
|
|
* to grow the device-tree allocation as we progress. If we can't,
|
|
|
|
* then we fail, we don't currently have a facility to restart
|
|
|
|
* elsewhere, but that shouldn't be necessary.
|
|
|
|
*
|
|
|
|
* Note that calls to reserve_mem have to be done explicitly, memory
|
|
|
|
* allocated with either alloc_up or alloc_down isn't automatically
|
|
|
|
* reserved.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Allocates memory in the RMO upward from the kernel/initrd
|
|
|
|
*
|
|
|
|
* When align is 0, this is a special case, it means to allocate in place
|
|
|
|
* at the current location of alloc_bottom or fail (that is basically
|
|
|
|
* extending the previous allocation). Used for the device-tree flattening
|
|
|
|
*/
|
|
|
|
static unsigned long __init alloc_up(unsigned long size, unsigned long align)
|
|
|
|
{
|
2005-10-26 07:52:53 -04:00
|
|
|
unsigned long base = RELOC(alloc_bottom);
|
2005-10-05 22:06:20 -04:00
|
|
|
unsigned long addr = 0;
|
|
|
|
|
2005-10-26 07:52:53 -04:00
|
|
|
if (align)
|
|
|
|
base = _ALIGN_UP(base, align);
|
2005-10-05 22:06:20 -04:00
|
|
|
prom_debug("alloc_up(%x, %x)\n", size, align);
|
|
|
|
if (RELOC(ram_top) == 0)
|
|
|
|
prom_panic("alloc_up() called with mem not initialized\n");
|
|
|
|
|
|
|
|
if (align)
|
|
|
|
base = _ALIGN_UP(RELOC(alloc_bottom), align);
|
|
|
|
else
|
|
|
|
base = RELOC(alloc_bottom);
|
|
|
|
|
|
|
|
for(; (base + size) <= RELOC(alloc_top);
|
|
|
|
base = _ALIGN_UP(base + 0x100000, align)) {
|
|
|
|
prom_debug(" trying: 0x%x\n\r", base);
|
|
|
|
addr = (unsigned long)prom_claim(base, size, 0);
|
2005-10-26 07:52:53 -04:00
|
|
|
if (addr != PROM_ERROR && addr != 0)
|
2005-10-05 22:06:20 -04:00
|
|
|
break;
|
|
|
|
addr = 0;
|
|
|
|
if (align == 0)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (addr == 0)
|
|
|
|
return 0;
|
|
|
|
RELOC(alloc_bottom) = addr;
|
|
|
|
|
|
|
|
prom_debug(" -> %x\n", addr);
|
|
|
|
prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom));
|
|
|
|
prom_debug(" alloc_top : %x\n", RELOC(alloc_top));
|
|
|
|
prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
|
|
|
|
prom_debug(" rmo_top : %x\n", RELOC(rmo_top));
|
|
|
|
prom_debug(" ram_top : %x\n", RELOC(ram_top));
|
|
|
|
|
|
|
|
return addr;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Allocates memory downward, either from top of RMO, or if highmem
|
|
|
|
* is set, from the top of RAM. Note that this one doesn't handle
|
|
|
|
* failures. It does claim memory if highmem is not set.
|
|
|
|
*/
|
|
|
|
static unsigned long __init alloc_down(unsigned long size, unsigned long align,
|
|
|
|
int highmem)
|
|
|
|
{
|
|
|
|
unsigned long base, addr = 0;
|
|
|
|
|
|
|
|
prom_debug("alloc_down(%x, %x, %s)\n", size, align,
|
|
|
|
highmem ? RELOC("(high)") : RELOC("(low)"));
|
|
|
|
if (RELOC(ram_top) == 0)
|
|
|
|
prom_panic("alloc_down() called with mem not initialized\n");
|
|
|
|
|
|
|
|
if (highmem) {
|
|
|
|
/* Carve out storage for the TCE table. */
|
|
|
|
addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align);
|
|
|
|
if (addr <= RELOC(alloc_bottom))
|
|
|
|
return 0;
|
|
|
|
/* Will we bump into the RMO ? If yes, check out that we
|
|
|
|
* didn't overlap existing allocations there, if we did,
|
|
|
|
* we are dead, we must be the first in town !
|
|
|
|
*/
|
|
|
|
if (addr < RELOC(rmo_top)) {
|
|
|
|
/* Good, we are first */
|
|
|
|
if (RELOC(alloc_top) == RELOC(rmo_top))
|
|
|
|
RELOC(alloc_top) = RELOC(rmo_top) = addr;
|
|
|
|
else
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
RELOC(alloc_top_high) = addr;
|
|
|
|
goto bail;
|
|
|
|
}
|
|
|
|
|
|
|
|
base = _ALIGN_DOWN(RELOC(alloc_top) - size, align);
|
|
|
|
for (; base > RELOC(alloc_bottom);
|
|
|
|
base = _ALIGN_DOWN(base - 0x100000, align)) {
|
|
|
|
prom_debug(" trying: 0x%x\n\r", base);
|
|
|
|
addr = (unsigned long)prom_claim(base, size, 0);
|
2005-10-26 07:52:53 -04:00
|
|
|
if (addr != PROM_ERROR && addr != 0)
|
2005-10-05 22:06:20 -04:00
|
|
|
break;
|
|
|
|
addr = 0;
|
|
|
|
}
|
|
|
|
if (addr == 0)
|
|
|
|
return 0;
|
|
|
|
RELOC(alloc_top) = addr;
|
|
|
|
|
|
|
|
bail:
|
|
|
|
prom_debug(" -> %x\n", addr);
|
|
|
|
prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom));
|
|
|
|
prom_debug(" alloc_top : %x\n", RELOC(alloc_top));
|
|
|
|
prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
|
|
|
|
prom_debug(" rmo_top : %x\n", RELOC(rmo_top));
|
|
|
|
prom_debug(" ram_top : %x\n", RELOC(ram_top));
|
|
|
|
|
|
|
|
return addr;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Parse a "reg" cell
|
|
|
|
*/
|
|
|
|
static unsigned long __init prom_next_cell(int s, cell_t **cellp)
|
|
|
|
{
|
|
|
|
cell_t *p = *cellp;
|
|
|
|
unsigned long r = 0;
|
|
|
|
|
|
|
|
/* Ignore more than 2 cells */
|
|
|
|
while (s > sizeof(unsigned long) / 4) {
|
|
|
|
p++;
|
|
|
|
s--;
|
|
|
|
}
|
|
|
|
r = *p++;
|
|
|
|
#ifdef CONFIG_PPC64
|
2005-10-22 02:02:39 -04:00
|
|
|
if (s > 1) {
|
2005-10-05 22:06:20 -04:00
|
|
|
r <<= 32;
|
|
|
|
r |= *(p++);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
*cellp = p;
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Very dumb function for adding to the memory reserve list, but
|
|
|
|
* we don't need anything smarter at this point
|
|
|
|
*
|
|
|
|
* XXX Eventually check for collisions. They should NEVER happen.
|
|
|
|
* If problems seem to show up, it would be a good start to track
|
|
|
|
* them down.
|
|
|
|
*/
|
2007-05-07 01:58:28 -04:00
|
|
|
static void __init reserve_mem(u64 base, u64 size)
|
2005-10-05 22:06:20 -04:00
|
|
|
{
|
2006-01-11 18:57:13 -05:00
|
|
|
u64 top = base + size;
|
2005-10-05 22:06:20 -04:00
|
|
|
unsigned long cnt = RELOC(mem_reserve_cnt);
|
|
|
|
|
|
|
|
if (size == 0)
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* We need to always keep one empty entry so that we
|
|
|
|
* have our terminator with "size" set to 0 since we are
|
|
|
|
* dumb and just copy this entire array to the boot params
|
|
|
|
*/
|
|
|
|
base = _ALIGN_DOWN(base, PAGE_SIZE);
|
|
|
|
top = _ALIGN_UP(top, PAGE_SIZE);
|
|
|
|
size = top - base;
|
|
|
|
|
|
|
|
if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
|
|
|
|
prom_panic("Memory reserve map exhausted !\n");
|
|
|
|
RELOC(mem_reserve_map)[cnt].base = base;
|
|
|
|
RELOC(mem_reserve_map)[cnt].size = size;
|
|
|
|
RELOC(mem_reserve_cnt) = cnt + 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2006-06-30 12:20:44 -04:00
|
|
|
* Initialize memory allocation mechanism, parse "memory" nodes and
|
2005-10-05 22:06:20 -04:00
|
|
|
* obtain that way the top of memory and RMO to setup out local allocator
|
|
|
|
*/
|
|
|
|
static void __init prom_init_mem(void)
|
|
|
|
{
|
|
|
|
phandle node;
|
|
|
|
char *path, type[64];
|
|
|
|
unsigned int plen;
|
|
|
|
cell_t *p, *endp;
|
|
|
|
struct prom_t *_prom = &RELOC(prom);
|
|
|
|
u32 rac, rsc;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We iterate the memory nodes to find
|
|
|
|
* 1) top of RMO (first node)
|
|
|
|
* 2) top of memory
|
|
|
|
*/
|
|
|
|
rac = 2;
|
|
|
|
prom_getprop(_prom->root, "#address-cells", &rac, sizeof(rac));
|
|
|
|
rsc = 1;
|
|
|
|
prom_getprop(_prom->root, "#size-cells", &rsc, sizeof(rsc));
|
|
|
|
prom_debug("root_addr_cells: %x\n", (unsigned long) rac);
|
|
|
|
prom_debug("root_size_cells: %x\n", (unsigned long) rsc);
|
|
|
|
|
|
|
|
prom_debug("scanning memory:\n");
|
|
|
|
path = RELOC(prom_scratch);
|
|
|
|
|
|
|
|
for (node = 0; prom_next_node(&node); ) {
|
|
|
|
type[0] = 0;
|
|
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
|
|
|
|
2005-10-26 07:52:53 -04:00
|
|
|
if (type[0] == 0) {
|
|
|
|
/*
|
|
|
|
* CHRP Longtrail machines have no device_type
|
|
|
|
* on the memory node, so check the name instead...
|
|
|
|
*/
|
|
|
|
prom_getprop(node, "name", type, sizeof(type));
|
|
|
|
}
|
2005-10-05 22:06:20 -04:00
|
|
|
if (strcmp(type, RELOC("memory")))
|
|
|
|
continue;
|
2005-10-26 07:52:53 -04:00
|
|
|
|
2005-10-05 22:06:20 -04:00
|
|
|
plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf));
|
|
|
|
if (plen > sizeof(regbuf)) {
|
|
|
|
prom_printf("memory node too large for buffer !\n");
|
|
|
|
plen = sizeof(regbuf);
|
|
|
|
}
|
|
|
|
p = RELOC(regbuf);
|
|
|
|
endp = p + (plen / sizeof(cell_t));
|
|
|
|
|
|
|
|
#ifdef DEBUG_PROM
|
|
|
|
memset(path, 0, PROM_SCRATCH_SIZE);
|
|
|
|
call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
|
|
|
|
prom_debug(" node %s :\n", path);
|
|
|
|
#endif /* DEBUG_PROM */
|
|
|
|
|
|
|
|
while ((endp - p) >= (rac + rsc)) {
|
|
|
|
unsigned long base, size;
|
|
|
|
|
|
|
|
base = prom_next_cell(rac, &p);
|
|
|
|
size = prom_next_cell(rsc, &p);
|
|
|
|
|
|
|
|
if (size == 0)
|
|
|
|
continue;
|
|
|
|
prom_debug(" %x %x\n", base, size);
|
2006-03-02 18:35:40 -05:00
|
|
|
if (base == 0 && (RELOC(of_platform) & PLATFORM_LPAR))
|
2005-10-05 22:06:20 -04:00
|
|
|
RELOC(rmo_top) = size;
|
|
|
|
if ((base + size) > RELOC(ram_top))
|
|
|
|
RELOC(ram_top) = base + size;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000);
|
|
|
|
|
|
|
|
/* Check if we have an initrd after the kernel, if we do move our bottom
|
|
|
|
* point to after it
|
|
|
|
*/
|
|
|
|
if (RELOC(prom_initrd_start)) {
|
|
|
|
if (RELOC(prom_initrd_end) > RELOC(alloc_bottom))
|
|
|
|
RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end));
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Setup our top alloc point, that is top of RMO or top of
|
|
|
|
* segment 0 when running non-LPAR.
|
|
|
|
* Some RS64 machines have buggy firmware where claims up at
|
|
|
|
* 1GB fail. Cap at 768MB as a workaround.
|
|
|
|
* Since 768MB is plenty of room, and we need to cap to something
|
|
|
|
* reasonable on 32-bit, cap at 768MB on all machines.
|
|
|
|
*/
|
|
|
|
if (!RELOC(rmo_top))
|
|
|
|
RELOC(rmo_top) = RELOC(ram_top);
|
|
|
|
RELOC(rmo_top) = min(0x30000000ul, RELOC(rmo_top));
|
|
|
|
RELOC(alloc_top) = RELOC(rmo_top);
|
2006-05-17 04:00:46 -04:00
|
|
|
RELOC(alloc_top_high) = RELOC(ram_top);
|
2005-10-05 22:06:20 -04:00
|
|
|
|
|
|
|
prom_printf("memory layout at init:\n");
|
|
|
|
prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom));
|
|
|
|
prom_printf(" alloc_top : %x\n", RELOC(alloc_top));
|
|
|
|
prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
|
|
|
|
prom_printf(" rmo_top : %x\n", RELOC(rmo_top));
|
|
|
|
prom_printf(" ram_top : %x\n", RELOC(ram_top));
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Allocate room for and instantiate RTAS
|
|
|
|
*/
|
|
|
|
static void __init prom_instantiate_rtas(void)
|
|
|
|
{
|
|
|
|
phandle rtas_node;
|
|
|
|
ihandle rtas_inst;
|
|
|
|
u32 base, entry = 0;
|
|
|
|
u32 size = 0;
|
|
|
|
|
|
|
|
prom_debug("prom_instantiate_rtas: start...\n");
|
|
|
|
|
|
|
|
rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
|
|
|
|
prom_debug("rtas_node: %x\n", rtas_node);
|
|
|
|
if (!PHANDLE_VALID(rtas_node))
|
|
|
|
return;
|
|
|
|
|
|
|
|
prom_getprop(rtas_node, "rtas-size", &size, sizeof(size));
|
|
|
|
if (size == 0)
|
|
|
|
return;
|
|
|
|
|
|
|
|
base = alloc_down(size, PAGE_SIZE, 0);
|
|
|
|
if (base == 0) {
|
|
|
|
prom_printf("RTAS allocation failed !\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
|
|
|
|
if (!IHANDLE_VALID(rtas_inst)) {
|
2005-11-09 20:00:55 -05:00
|
|
|
prom_printf("opening rtas package failed (%x)\n", rtas_inst);
|
2005-10-05 22:06:20 -04:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
prom_printf("instantiating rtas at 0x%x ...", base);
|
|
|
|
|
|
|
|
if (call_prom_ret("call-method", 3, 2, &entry,
|
|
|
|
ADDR("instantiate-rtas"),
|
2005-11-09 20:00:55 -05:00
|
|
|
rtas_inst, base) != 0
|
2005-10-05 22:06:20 -04:00
|
|
|
|| entry == 0) {
|
|
|
|
prom_printf(" failed\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
prom_printf(" done\n");
|
|
|
|
|
|
|
|
reserve_mem(base, size);
|
|
|
|
|
2005-11-09 20:00:55 -05:00
|
|
|
prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
|
|
|
|
&base, sizeof(base));
|
|
|
|
prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
|
|
|
|
&entry, sizeof(entry));
|
2005-10-05 22:06:20 -04:00
|
|
|
|
|
|
|
prom_debug("rtas base = 0x%x\n", base);
|
|
|
|
prom_debug("rtas entry = 0x%x\n", entry);
|
|
|
|
prom_debug("rtas size = 0x%x\n", (long)size);
|
|
|
|
|
|
|
|
prom_debug("prom_instantiate_rtas: end...\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_PPC64
|
|
|
|
/*
|
|
|
|
* Allocate room for and initialize TCE tables
|
|
|
|
*/
|
|
|
|
static void __init prom_initialize_tce_table(void)
|
|
|
|
{
|
|
|
|
phandle node;
|
|
|
|
ihandle phb_node;
|
|
|
|
char compatible[64], type[64], model[64];
|
|
|
|
char *path = RELOC(prom_scratch);
|
|
|
|
u64 base, align;
|
|
|
|
u32 minalign, minsize;
|
|
|
|
u64 tce_entry, *tce_entryp;
|
|
|
|
u64 local_alloc_top, local_alloc_bottom;
|
|
|
|
u64 i;
|
|
|
|
|
2006-11-11 01:25:18 -05:00
|
|
|
if (RELOC(prom_iommu_off))
|
2005-10-05 22:06:20 -04:00
|
|
|
return;
|
|
|
|
|
|
|
|
prom_debug("starting prom_initialize_tce_table\n");
|
|
|
|
|
|
|
|
/* Cache current top of allocs so we reserve a single block */
|
|
|
|
local_alloc_top = RELOC(alloc_top_high);
|
|
|
|
local_alloc_bottom = local_alloc_top;
|
|
|
|
|
|
|
|
/* Search all nodes looking for PHBs. */
|
|
|
|
for (node = 0; prom_next_node(&node); ) {
|
|
|
|
compatible[0] = 0;
|
|
|
|
type[0] = 0;
|
|
|
|
model[0] = 0;
|
|
|
|
prom_getprop(node, "compatible",
|
|
|
|
compatible, sizeof(compatible));
|
|
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
|
|
|
prom_getprop(node, "model", model, sizeof(model));
|
|
|
|
|
|
|
|
if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL))
|
|
|
|
continue;
|
|
|
|
|
2007-09-06 13:45:21 -04:00
|
|
|
/* Keep the old logic intact to avoid regression. */
|
2005-10-05 22:06:20 -04:00
|
|
|
if (compatible[0] != 0) {
|
|
|
|
if ((strstr(compatible, RELOC("python")) == NULL) &&
|
|
|
|
(strstr(compatible, RELOC("Speedwagon")) == NULL) &&
|
|
|
|
(strstr(compatible, RELOC("Winnipeg")) == NULL))
|
|
|
|
continue;
|
|
|
|
} else if (model[0] != 0) {
|
|
|
|
if ((strstr(model, RELOC("ython")) == NULL) &&
|
|
|
|
(strstr(model, RELOC("peedwagon")) == NULL) &&
|
|
|
|
(strstr(model, RELOC("innipeg")) == NULL))
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (prom_getprop(node, "tce-table-minalign", &minalign,
|
|
|
|
sizeof(minalign)) == PROM_ERROR)
|
|
|
|
minalign = 0;
|
|
|
|
if (prom_getprop(node, "tce-table-minsize", &minsize,
|
|
|
|
sizeof(minsize)) == PROM_ERROR)
|
|
|
|
minsize = 4UL << 20;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Even though we read what OF wants, we just set the table
|
|
|
|
* size to 4 MB. This is enough to map 2GB of PCI DMA space.
|
|
|
|
* By doing this, we avoid the pitfalls of trying to DMA to
|
|
|
|
* MMIO space and the DMA alias hole.
|
|
|
|
*
|
|
|
|
* On POWER4, firmware sets the TCE region by assuming
|
|
|
|
* each TCE table is 8MB. Using this memory for anything
|
|
|
|
* else will impact performance, so we always allocate 8MB.
|
|
|
|
* Anton
|
|
|
|
*/
|
|
|
|
if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p))
|
|
|
|
minsize = 8UL << 20;
|
|
|
|
else
|
|
|
|
minsize = 4UL << 20;
|
|
|
|
|
|
|
|
/* Align to the greater of the align or size */
|
|
|
|
align = max(minalign, minsize);
|
|
|
|
base = alloc_down(minsize, align, 1);
|
|
|
|
if (base == 0)
|
|
|
|
prom_panic("ERROR, cannot find space for TCE table.\n");
|
|
|
|
if (base < local_alloc_bottom)
|
|
|
|
local_alloc_bottom = base;
|
|
|
|
|
|
|
|
/* It seems OF doesn't null-terminate the path :-( */
|
|
|
|
memset(path, 0, sizeof(path));
|
|
|
|
/* Call OF to setup the TCE hardware */
|
|
|
|
if (call_prom("package-to-path", 3, 1, node,
|
|
|
|
path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) {
|
|
|
|
prom_printf("package-to-path failed\n");
|
|
|
|
}
|
|
|
|
|
2005-11-09 20:00:55 -05:00
|
|
|
/* Save away the TCE table attributes for later use. */
|
|
|
|
prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
|
|
|
|
prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
|
|
|
|
|
2005-10-05 22:06:20 -04:00
|
|
|
prom_debug("TCE table: %s\n", path);
|
|
|
|
prom_debug("\tnode = 0x%x\n", node);
|
|
|
|
prom_debug("\tbase = 0x%x\n", base);
|
|
|
|
prom_debug("\tsize = 0x%x\n", minsize);
|
|
|
|
|
|
|
|
/* Initialize the table to have a one-to-one mapping
|
|
|
|
* over the allocated size.
|
|
|
|
*/
|
|
|
|
tce_entryp = (unsigned long *)base;
|
|
|
|
for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
|
|
|
|
tce_entry = (i << PAGE_SHIFT);
|
|
|
|
tce_entry |= 0x3;
|
|
|
|
*tce_entryp = tce_entry;
|
|
|
|
}
|
|
|
|
|
|
|
|
prom_printf("opening PHB %s", path);
|
|
|
|
phb_node = call_prom("open", 1, 1, path);
|
|
|
|
if (phb_node == 0)
|
|
|
|
prom_printf("... failed\n");
|
|
|
|
else
|
|
|
|
prom_printf("... done\n");
|
|
|
|
|
|
|
|
call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
|
|
|
|
phb_node, -1, minsize,
|
|
|
|
(u32) base, (u32) (base >> 32));
|
|
|
|
call_prom("close", 1, 0, phb_node);
|
|
|
|
}
|
|
|
|
|
|
|
|
reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
|
|
|
|
|
2006-05-17 04:00:46 -04:00
|
|
|
/* These are only really needed if there is a memory limit in
|
|
|
|
* effect, but we don't know so export them always. */
|
|
|
|
RELOC(prom_tce_alloc_start) = local_alloc_bottom;
|
|
|
|
RELOC(prom_tce_alloc_end) = local_alloc_top;
|
2005-10-05 22:06:20 -04:00
|
|
|
|
|
|
|
/* Flag the first invalid entry */
|
|
|
|
prom_debug("ending prom_initialize_tce_table\n");
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/*
|
|
|
|
* With CHRP SMP we need to use the OF to start the other processors.
|
|
|
|
* We can't wait until smp_boot_cpus (the OF is trashed by then)
|
|
|
|
* so we have to put the processors into a holding pattern controlled
|
|
|
|
* by the kernel (not OF) before we destroy the OF.
|
|
|
|
*
|
|
|
|
* This uses a chunk of low memory, puts some holding pattern
|
|
|
|
* code there and sends the other processors off to there until
|
|
|
|
* smp_boot_cpus tells them to do something. The holding pattern
|
|
|
|
* checks that address until its cpu # is there, when it is that
|
|
|
|
* cpu jumps to __secondary_start(). smp_boot_cpus() takes care
|
|
|
|
* of setting those values.
|
|
|
|
*
|
|
|
|
* We also use physical address 0x4 here to tell when a cpu
|
|
|
|
* is in its holding pattern code.
|
|
|
|
*
|
|
|
|
* -- Cort
|
|
|
|
*/
|
2005-10-26 07:45:56 -04:00
|
|
|
extern void __secondary_hold(void);
|
|
|
|
extern unsigned long __secondary_hold_spinloop;
|
|
|
|
extern unsigned long __secondary_hold_acknowledge;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We want to reference the copy of __secondary_hold_* in the
|
|
|
|
* 0 - 0x100 address range
|
|
|
|
*/
|
|
|
|
#define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
|
|
|
|
|
2005-10-05 22:06:20 -04:00
|
|
|
static void __init prom_hold_cpus(void)
|
|
|
|
{
|
|
|
|
unsigned long i;
|
|
|
|
unsigned int reg;
|
|
|
|
phandle node;
|
|
|
|
char type[64];
|
|
|
|
int cpuid = 0;
|
|
|
|
unsigned int interrupt_server[MAX_CPU_THREADS];
|
|
|
|
unsigned int cpu_threads, hw_cpu_num;
|
|
|
|
int propsize;
|
2005-10-26 07:45:56 -04:00
|
|
|
struct prom_t *_prom = &RELOC(prom);
|
2005-10-05 22:06:20 -04:00
|
|
|
unsigned long *spinloop
|
2005-10-26 07:45:56 -04:00
|
|
|
= (void *) LOW_ADDR(__secondary_hold_spinloop);
|
2005-10-05 22:06:20 -04:00
|
|
|
unsigned long *acknowledge
|
2005-10-26 07:45:56 -04:00
|
|
|
= (void *) LOW_ADDR(__secondary_hold_acknowledge);
|
2005-10-05 22:06:20 -04:00
|
|
|
#ifdef CONFIG_PPC64
|
2005-10-26 07:45:56 -04:00
|
|
|
/* __secondary_hold is actually a descriptor, not the text address */
|
2005-10-05 22:06:20 -04:00
|
|
|
unsigned long secondary_hold
|
|
|
|
= __pa(*PTRRELOC((unsigned long *)__secondary_hold));
|
|
|
|
#else
|
2005-10-26 07:45:56 -04:00
|
|
|
unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
|
2005-10-05 22:06:20 -04:00
|
|
|
#endif
|
|
|
|
|
|
|
|
prom_debug("prom_hold_cpus: start...\n");
|
|
|
|
prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop);
|
|
|
|
prom_debug(" 1) *spinloop = 0x%x\n", *spinloop);
|
|
|
|
prom_debug(" 1) acknowledge = 0x%x\n",
|
|
|
|
(unsigned long)acknowledge);
|
|
|
|
prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge);
|
|
|
|
prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold);
|
|
|
|
|
|
|
|
/* Set the common spinloop variable, so all of the secondary cpus
|
|
|
|
* will block when they are awakened from their OF spinloop.
|
|
|
|
* This must occur for both SMP and non SMP kernels, since OF will
|
|
|
|
* be trashed when we move the kernel.
|
|
|
|
*/
|
|
|
|
*spinloop = 0;
|
|
|
|
|
|
|
|
/* look for cpus */
|
|
|
|
for (node = 0; prom_next_node(&node); ) {
|
|
|
|
type[0] = 0;
|
|
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
|
|
|
if (strcmp(type, RELOC("cpu")) != 0)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
/* Skip non-configured cpus. */
|
|
|
|
if (prom_getprop(node, "status", type, sizeof(type)) > 0)
|
|
|
|
if (strcmp(type, RELOC("okay")) != 0)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
reg = -1;
|
|
|
|
prom_getprop(node, "reg", ®, sizeof(reg));
|
|
|
|
|
|
|
|
prom_debug("\ncpuid = 0x%x\n", cpuid);
|
|
|
|
prom_debug("cpu hw idx = 0x%x\n", reg);
|
|
|
|
|
|
|
|
/* Init the acknowledge var which will be reset by
|
|
|
|
* the secondary cpu when it awakens from its OF
|
|
|
|
* spinloop.
|
|
|
|
*/
|
|
|
|
*acknowledge = (unsigned long)-1;
|
|
|
|
|
|
|
|
propsize = prom_getprop(node, "ibm,ppc-interrupt-server#s",
|
|
|
|
&interrupt_server,
|
|
|
|
sizeof(interrupt_server));
|
|
|
|
if (propsize < 0) {
|
|
|
|
/* no property. old hardware has no SMT */
|
|
|
|
cpu_threads = 1;
|
|
|
|
interrupt_server[0] = reg; /* fake it with phys id */
|
|
|
|
} else {
|
|
|
|
/* We have a threaded processor */
|
|
|
|
cpu_threads = propsize / sizeof(u32);
|
|
|
|
if (cpu_threads > MAX_CPU_THREADS) {
|
|
|
|
prom_printf("SMT: too many threads!\n"
|
|
|
|
"SMT: found %x, max is %x\n",
|
|
|
|
cpu_threads, MAX_CPU_THREADS);
|
|
|
|
cpu_threads = 1; /* ToDo: panic? */
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
hw_cpu_num = interrupt_server[0];
|
|
|
|
if (hw_cpu_num != _prom->cpu) {
|
|
|
|
/* Primary Thread of non-boot cpu */
|
|
|
|
prom_printf("%x : starting cpu hw idx %x... ", cpuid, reg);
|
|
|
|
call_prom("start-cpu", 3, 0, node,
|
|
|
|
secondary_hold, reg);
|
|
|
|
|
2005-10-26 07:45:56 -04:00
|
|
|
for (i = 0; (i < 100000000) &&
|
|
|
|
(*acknowledge == ((unsigned long)-1)); i++ )
|
2005-10-05 22:06:20 -04:00
|
|
|
mb();
|
|
|
|
|
2005-10-26 07:45:56 -04:00
|
|
|
if (*acknowledge == reg)
|
2005-10-05 22:06:20 -04:00
|
|
|
prom_printf("done\n");
|
2005-10-26 07:45:56 -04:00
|
|
|
else
|
2005-10-05 22:06:20 -04:00
|
|
|
prom_printf("failed: %x\n", *acknowledge);
|
|
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
else
|
|
|
|
prom_printf("%x : boot cpu %x\n", cpuid, reg);
|
|
|
|
#endif /* CONFIG_SMP */
|
2005-10-26 07:45:56 -04:00
|
|
|
|
|
|
|
/* Reserve cpu #s for secondary threads. They start later. */
|
|
|
|
cpuid += cpu_threads;
|
2005-10-05 22:06:20 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
if (cpuid > NR_CPUS)
|
|
|
|
prom_printf("WARNING: maximum CPUs (" __stringify(NR_CPUS)
|
|
|
|
") exceeded: ignoring extras\n");
|
|
|
|
|
|
|
|
prom_debug("prom_hold_cpus: end...\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void __init prom_init_client_services(unsigned long pp)
|
|
|
|
{
|
|
|
|
struct prom_t *_prom = &RELOC(prom);
|
|
|
|
|
|
|
|
/* Get a handle to the prom entry point before anything else */
|
|
|
|
RELOC(prom_entry) = pp;
|
|
|
|
|
|
|
|
/* get a handle for the stdout device */
|
|
|
|
_prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
|
|
|
|
if (!PHANDLE_VALID(_prom->chosen))
|
|
|
|
prom_panic("cannot find chosen"); /* msg won't be printed :( */
|
|
|
|
|
|
|
|
/* get device tree root */
|
|
|
|
_prom->root = call_prom("finddevice", 1, 1, ADDR("/"));
|
|
|
|
if (!PHANDLE_VALID(_prom->root))
|
|
|
|
prom_panic("cannot find device tree root"); /* msg won't be printed :( */
|
2005-10-23 03:23:21 -04:00
|
|
|
|
|
|
|
_prom->mmumap = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_PPC32
|
|
|
|
/*
|
|
|
|
* For really old powermacs, we need to map things we claim.
|
|
|
|
* For that, we need the ihandle of the mmu.
|
2005-11-09 20:00:55 -05:00
|
|
|
* Also, on the longtrail, we need to work around other bugs.
|
2005-10-23 03:23:21 -04:00
|
|
|
*/
|
|
|
|
static void __init prom_find_mmu(void)
|
|
|
|
{
|
|
|
|
struct prom_t *_prom = &RELOC(prom);
|
|
|
|
phandle oprom;
|
|
|
|
char version[64];
|
|
|
|
|
|
|
|
oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
|
|
|
|
if (!PHANDLE_VALID(oprom))
|
|
|
|
return;
|
|
|
|
if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
|
|
|
|
return;
|
|
|
|
version[sizeof(version) - 1] = 0;
|
|
|
|
/* XXX might need to add other versions here */
|
2005-11-09 20:00:55 -05:00
|
|
|
if (strcmp(version, "Open Firmware, 1.0.5") == 0)
|
|
|
|
of_workarounds = OF_WA_CLAIM;
|
|
|
|
else if (strncmp(version, "FirmWorks,3.", 12) == 0) {
|
|
|
|
of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
|
|
|
|
call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
|
|
|
|
} else
|
2005-10-23 03:23:21 -04:00
|
|
|
return;
|
2005-11-09 20:00:55 -05:00
|
|
|
_prom->memory = call_prom("open", 1, 1, ADDR("/memory"));
|
2005-10-23 03:23:21 -04:00
|
|
|
prom_getprop(_prom->chosen, "mmu", &_prom->mmumap,
|
|
|
|
sizeof(_prom->mmumap));
|
2005-11-09 20:00:55 -05:00
|
|
|
if (!IHANDLE_VALID(_prom->memory) || !IHANDLE_VALID(_prom->mmumap))
|
|
|
|
of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
|
2005-10-05 22:06:20 -04:00
|
|
|
}
|
2005-10-23 03:23:21 -04:00
|
|
|
#else
|
|
|
|
#define prom_find_mmu()
|
|
|
|
#endif
|
2005-10-05 22:06:20 -04:00
|
|
|
|
|
|
|
static void __init prom_init_stdout(void)
|
|
|
|
{
|
|
|
|
struct prom_t *_prom = &RELOC(prom);
|
|
|
|
char *path = RELOC(of_stdout_device);
|
|
|
|
char type[16];
|
|
|
|
u32 val;
|
|
|
|
|
|
|
|
if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0)
|
|
|
|
prom_panic("cannot find stdout");
|
|
|
|
|
|
|
|
_prom->stdout = val;
|
|
|
|
|
|
|
|
/* Get the full OF pathname of the stdout device */
|
|
|
|
memset(path, 0, 256);
|
|
|
|
call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255);
|
|
|
|
val = call_prom("instance-to-package", 1, 1, _prom->stdout);
|
2005-11-09 20:00:55 -05:00
|
|
|
prom_setprop(_prom->chosen, "/chosen", "linux,stdout-package",
|
|
|
|
&val, sizeof(val));
|
2005-10-05 22:06:20 -04:00
|
|
|
prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device));
|
2005-11-09 20:00:55 -05:00
|
|
|
prom_setprop(_prom->chosen, "/chosen", "linux,stdout-path",
|
|
|
|
path, strlen(path) + 1);
|
2005-10-05 22:06:20 -04:00
|
|
|
|
|
|
|
/* If it's a display, note it */
|
|
|
|
memset(type, 0, sizeof(type));
|
|
|
|
prom_getprop(val, "device_type", type, sizeof(type));
|
|
|
|
if (strcmp(type, RELOC("display")) == 0)
|
2005-11-09 20:00:55 -05:00
|
|
|
prom_setprop(val, path, "linux,boot-display", NULL, 0);
|
2005-10-05 22:06:20 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
static void __init prom_close_stdin(void)
|
|
|
|
{
|
|
|
|
struct prom_t *_prom = &RELOC(prom);
|
|
|
|
ihandle val;
|
|
|
|
|
|
|
|
if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0)
|
|
|
|
call_prom("close", 1, 0, val);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __init prom_find_machine_type(void)
|
|
|
|
{
|
|
|
|
struct prom_t *_prom = &RELOC(prom);
|
|
|
|
char compat[256];
|
|
|
|
int len, i = 0;
|
2005-11-07 00:41:59 -05:00
|
|
|
#ifdef CONFIG_PPC64
|
2005-10-05 22:06:20 -04:00
|
|
|
phandle rtas;
|
2006-03-28 07:15:54 -05:00
|
|
|
int x;
|
2005-11-07 00:41:59 -05:00
|
|
|
#endif
|
2006-03-28 07:15:54 -05:00
|
|
|
|
|
|
|
/* Look for a PowerMac */
|
2005-10-05 22:06:20 -04:00
|
|
|
len = prom_getprop(_prom->root, "compatible",
|
|
|
|
compat, sizeof(compat)-1);
|
|
|
|
if (len > 0) {
|
|
|
|
compat[len] = 0;
|
|
|
|
while (i < len) {
|
|
|
|
char *p = &compat[i];
|
|
|
|
int sl = strlen(p);
|
|
|
|
if (sl == 0)
|
|
|
|
break;
|
|
|
|
if (strstr(p, RELOC("Power Macintosh")) ||
|
2005-10-23 03:23:21 -04:00
|
|
|
strstr(p, RELOC("MacRISC")))
|
2005-10-05 22:06:20 -04:00
|
|
|
return PLATFORM_POWERMAC;
|
2006-06-06 22:04:18 -04:00
|
|
|
#ifdef CONFIG_PPC64
|
|
|
|
/* We must make sure we don't detect the IBM Cell
|
|
|
|
* blades as pSeries due to some firmware issues,
|
|
|
|
* so we do it here.
|
|
|
|
*/
|
|
|
|
if (strstr(p, RELOC("IBM,CBEA")) ||
|
|
|
|
strstr(p, RELOC("IBM,CPBW-1.0")))
|
|
|
|
return PLATFORM_GENERIC;
|
|
|
|
#endif /* CONFIG_PPC64 */
|
2005-10-05 22:06:20 -04:00
|
|
|
i += sl + 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#ifdef CONFIG_PPC64
|
2006-03-28 07:15:54 -05:00
|
|
|
/* If not a mac, try to figure out if it's an IBM pSeries or any other
|
|
|
|
* PAPR compliant platform. We assume it is if :
|
|
|
|
* - /device_type is "chrp" (please, do NOT use that for future
|
|
|
|
* non-IBM designs !
|
|
|
|
* - it has /rtas
|
|
|
|
*/
|
2006-04-06 23:56:21 -04:00
|
|
|
len = prom_getprop(_prom->root, "device_type",
|
2006-03-28 07:15:54 -05:00
|
|
|
compat, sizeof(compat)-1);
|
|
|
|
if (len <= 0)
|
|
|
|
return PLATFORM_GENERIC;
|
2006-05-15 01:46:03 -04:00
|
|
|
if (strcmp(compat, RELOC("chrp")))
|
2006-03-28 07:15:54 -05:00
|
|
|
return PLATFORM_GENERIC;
|
|
|
|
|
2005-10-05 22:06:20 -04:00
|
|
|
/* Default to pSeries. We need to know if we are running LPAR */
|
|
|
|
rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
|
2006-03-28 07:15:54 -05:00
|
|
|
if (!PHANDLE_VALID(rtas))
|
|
|
|
return PLATFORM_GENERIC;
|
|
|
|
x = prom_getproplen(rtas, "ibm,hypertas-functions");
|
|
|
|
if (x != PROM_ERROR) {
|
|
|
|
prom_printf("Hypertas detected, assuming LPAR !\n");
|
|
|
|
return PLATFORM_PSERIES_LPAR;
|
2005-10-05 22:06:20 -04:00
|
|
|
}
|
|
|
|
return PLATFORM_PSERIES;
|
|
|
|
#else
|
2006-03-28 07:15:54 -05:00
|
|
|
return PLATFORM_GENERIC;
|
2005-10-05 22:06:20 -04:00
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
|
|
|
|
{
|
|
|
|
return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If we have a display that we don't know how to drive,
|
|
|
|
* we will want to try to execute OF's open method for it
|
|
|
|
* later. However, OF will probably fall over if we do that
|
|
|
|
* we've taken over the MMU.
|
|
|
|
* So we check whether we will need to open the display,
|
|
|
|
* and if so, open it now.
|
|
|
|
*/
|
|
|
|
static void __init prom_check_displays(void)
|
|
|
|
{
|
|
|
|
char type[16], *path;
|
|
|
|
phandle node;
|
|
|
|
ihandle ih;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
static unsigned char default_colors[] = {
|
|
|
|
0x00, 0x00, 0x00,
|
|
|
|
0x00, 0x00, 0xaa,
|
|
|
|
0x00, 0xaa, 0x00,
|
|
|
|
0x00, 0xaa, 0xaa,
|
|
|
|
0xaa, 0x00, 0x00,
|
|
|
|
0xaa, 0x00, 0xaa,
|
|
|
|
0xaa, 0xaa, 0x00,
|
|
|
|
0xaa, 0xaa, 0xaa,
|
|
|
|
0x55, 0x55, 0x55,
|
|
|
|
0x55, 0x55, 0xff,
|
|
|
|
0x55, 0xff, 0x55,
|
|
|
|
0x55, 0xff, 0xff,
|
|
|
|
0xff, 0x55, 0x55,
|
|
|
|
0xff, 0x55, 0xff,
|
|
|
|
0xff, 0xff, 0x55,
|
|
|
|
0xff, 0xff, 0xff
|
|
|
|
};
|
|
|
|
const unsigned char *clut;
|
|
|
|
|
|
|
|
prom_printf("Looking for displays\n");
|
|
|
|
for (node = 0; prom_next_node(&node); ) {
|
|
|
|
memset(type, 0, sizeof(type));
|
|
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
|
|
|
if (strcmp(type, RELOC("display")) != 0)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
/* It seems OF doesn't null-terminate the path :-( */
|
|
|
|
path = RELOC(prom_scratch);
|
|
|
|
memset(path, 0, PROM_SCRATCH_SIZE);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* leave some room at the end of the path for appending extra
|
|
|
|
* arguments
|
|
|
|
*/
|
|
|
|
if (call_prom("package-to-path", 3, 1, node, path,
|
|
|
|
PROM_SCRATCH_SIZE-10) == PROM_ERROR)
|
|
|
|
continue;
|
|
|
|
prom_printf("found display : %s, opening ... ", path);
|
|
|
|
|
|
|
|
ih = call_prom("open", 1, 1, path);
|
|
|
|
if (ih == 0) {
|
|
|
|
prom_printf("failed\n");
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Success */
|
|
|
|
prom_printf("done\n");
|
2005-11-09 20:00:55 -05:00
|
|
|
prom_setprop(node, path, "linux,opened", NULL, 0);
|
2005-10-05 22:06:20 -04:00
|
|
|
|
|
|
|
/* Setup a usable color table when the appropriate
|
|
|
|
* method is available. Should update this to set-colors */
|
|
|
|
clut = RELOC(default_colors);
|
|
|
|
for (i = 0; i < 32; i++, clut += 3)
|
|
|
|
if (prom_set_color(ih, i, clut[0], clut[1],
|
|
|
|
clut[2]) != 0)
|
|
|
|
break;
|
|
|
|
|
|
|
|
#ifdef CONFIG_LOGO_LINUX_CLUT224
|
|
|
|
clut = PTRRELOC(RELOC(logo_linux_clut224.clut));
|
|
|
|
for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3)
|
|
|
|
if (prom_set_color(ih, i + 32, clut[0], clut[1],
|
|
|
|
clut[2]) != 0)
|
|
|
|
break;
|
|
|
|
#endif /* CONFIG_LOGO_LINUX_CLUT224 */
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* Return (relocated) pointer to this much memory: moves initrd if reqd. */
|
|
|
|
static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
|
|
|
|
unsigned long needed, unsigned long align)
|
|
|
|
{
|
|
|
|
void *ret;
|
|
|
|
|
|
|
|
*mem_start = _ALIGN(*mem_start, align);
|
|
|
|
while ((*mem_start + needed) > *mem_end) {
|
|
|
|
unsigned long room, chunk;
|
|
|
|
|
|
|
|
prom_debug("Chunk exhausted, claiming more at %x...\n",
|
|
|
|
RELOC(alloc_bottom));
|
|
|
|
room = RELOC(alloc_top) - RELOC(alloc_bottom);
|
|
|
|
if (room > DEVTREE_CHUNK_SIZE)
|
|
|
|
room = DEVTREE_CHUNK_SIZE;
|
|
|
|
if (room < PAGE_SIZE)
|
|
|
|
prom_panic("No memory for flatten_device_tree (no room)");
|
|
|
|
chunk = alloc_up(room, 0);
|
|
|
|
if (chunk == 0)
|
|
|
|
prom_panic("No memory for flatten_device_tree (claim failed)");
|
|
|
|
*mem_end = RELOC(alloc_top);
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = (void *)*mem_start;
|
|
|
|
*mem_start += needed;
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
#define dt_push_token(token, mem_start, mem_end) \
|
|
|
|
do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0)
|
|
|
|
|
|
|
|
static unsigned long __init dt_find_string(char *str)
|
|
|
|
{
|
|
|
|
char *s, *os;
|
|
|
|
|
|
|
|
s = os = (char *)RELOC(dt_string_start);
|
|
|
|
s += 4;
|
|
|
|
while (s < (char *)RELOC(dt_string_end)) {
|
|
|
|
if (strcmp(s, str) == 0)
|
|
|
|
return s - os;
|
|
|
|
s += strlen(s) + 1;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* The Open Firmware 1275 specification states properties must be 31 bytes or
|
|
|
|
* less, however not all firmwares obey this. Make it 64 bytes to be safe.
|
|
|
|
*/
|
|
|
|
#define MAX_PROPERTY_NAME 64
|
|
|
|
|
|
|
|
static void __init scan_dt_build_strings(phandle node,
|
|
|
|
unsigned long *mem_start,
|
|
|
|
unsigned long *mem_end)
|
|
|
|
{
|
|
|
|
char *prev_name, *namep, *sstart;
|
|
|
|
unsigned long soff;
|
|
|
|
phandle child;
|
|
|
|
|
|
|
|
sstart = (char *)RELOC(dt_string_start);
|
|
|
|
|
|
|
|
/* get and store all property names */
|
|
|
|
prev_name = RELOC("");
|
|
|
|
for (;;) {
|
|
|
|
/* 64 is max len of name including nul. */
|
|
|
|
namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
|
|
|
|
if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
|
|
|
|
/* No more nodes: unwind alloc */
|
|
|
|
*mem_start = (unsigned long)namep;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* skip "name" */
|
|
|
|
if (strcmp(namep, RELOC("name")) == 0) {
|
|
|
|
*mem_start = (unsigned long)namep;
|
|
|
|
prev_name = RELOC("name");
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
/* get/create string entry */
|
|
|
|
soff = dt_find_string(namep);
|
|
|
|
if (soff != 0) {
|
|
|
|
*mem_start = (unsigned long)namep;
|
|
|
|
namep = sstart + soff;
|
|
|
|
} else {
|
|
|
|
/* Trim off some if we can */
|
|
|
|
*mem_start = (unsigned long)namep + strlen(namep) + 1;
|
|
|
|
RELOC(dt_string_end) = *mem_start;
|
|
|
|
}
|
|
|
|
prev_name = namep;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* do all our children */
|
|
|
|
child = call_prom("child", 1, 1, node);
|
|
|
|
while (child != 0) {
|
|
|
|
scan_dt_build_strings(child, mem_start, mem_end);
|
|
|
|
child = call_prom("peer", 1, 1, child);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
|
|
|
|
unsigned long *mem_end)
|
|
|
|
{
|
|
|
|
phandle child;
|
|
|
|
char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
|
|
|
|
unsigned long soff;
|
|
|
|
unsigned char *valp;
|
|
|
|
static char pname[MAX_PROPERTY_NAME];
|
2005-10-26 07:52:53 -04:00
|
|
|
int l, room;
|
2005-10-05 22:06:20 -04:00
|
|
|
|
|
|
|
dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
|
|
|
|
|
|
|
|
/* get the node's full name */
|
|
|
|
namep = (char *)*mem_start;
|
2005-10-26 07:52:53 -04:00
|
|
|
room = *mem_end - *mem_start;
|
|
|
|
if (room > 255)
|
|
|
|
room = 255;
|
|
|
|
l = call_prom("package-to-path", 3, 1, node, namep, room);
|
2005-10-05 22:06:20 -04:00
|
|
|
if (l >= 0) {
|
|
|
|
/* Didn't fit? Get more room. */
|
2005-10-26 07:52:53 -04:00
|
|
|
if (l >= room) {
|
|
|
|
if (l >= *mem_end - *mem_start)
|
|
|
|
namep = make_room(mem_start, mem_end, l+1, 1);
|
2005-10-05 22:06:20 -04:00
|
|
|
call_prom("package-to-path", 3, 1, node, namep, l);
|
|
|
|
}
|
|
|
|
namep[l] = '\0';
|
|
|
|
|
|
|
|
/* Fixup an Apple bug where they have bogus \0 chars in the
|
2005-10-23 03:23:21 -04:00
|
|
|
* middle of the path in some properties, and extract
|
|
|
|
* the unit name (everything after the last '/').
|
2005-10-05 22:06:20 -04:00
|
|
|
*/
|
2005-10-23 03:23:21 -04:00
|
|
|
for (lp = p = namep, ep = namep + l; p < ep; p++) {
|
2005-10-05 22:06:20 -04:00
|
|
|
if (*p == '/')
|
2005-10-23 03:23:21 -04:00
|
|
|
lp = namep;
|
|
|
|
else if (*p != 0)
|
|
|
|
*lp++ = *p;
|
|
|
|
}
|
|
|
|
*lp = 0;
|
|
|
|
*mem_start = _ALIGN((unsigned long)lp + 1, 4);
|
2005-10-05 22:06:20 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
/* get it again for debugging */
|
|
|
|
path = RELOC(prom_scratch);
|
|
|
|
memset(path, 0, PROM_SCRATCH_SIZE);
|
|
|
|
call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
|
|
|
|
|
|
|
|
/* get and store all properties */
|
|
|
|
prev_name = RELOC("");
|
|
|
|
sstart = (char *)RELOC(dt_string_start);
|
|
|
|
for (;;) {
|
|
|
|
if (call_prom("nextprop", 3, 1, node, prev_name,
|
|
|
|
RELOC(pname)) != 1)
|
|
|
|
break;
|
|
|
|
|
|
|
|
/* skip "name" */
|
|
|
|
if (strcmp(RELOC(pname), RELOC("name")) == 0) {
|
|
|
|
prev_name = RELOC("name");
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* find string offset */
|
|
|
|
soff = dt_find_string(RELOC(pname));
|
|
|
|
if (soff == 0) {
|
|
|
|
prom_printf("WARNING: Can't find string index for"
|
|
|
|
" <%s>, node %s\n", RELOC(pname), path);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
prev_name = sstart + soff;
|
|
|
|
|
|
|
|
/* get length */
|
|
|
|
l = call_prom("getproplen", 2, 1, node, RELOC(pname));
|
|
|
|
|
|
|
|
/* sanity checks */
|
|
|
|
if (l == PROM_ERROR)
|
|
|
|
continue;
|
|
|
|
if (l > MAX_PROPERTY_LENGTH) {
|
|
|
|
prom_printf("WARNING: ignoring large property ");
|
|
|
|
/* It seems OF doesn't null-terminate the path :-( */
|
|
|
|
prom_printf("[%s] ", path);
|
|
|
|
prom_printf("%s length 0x%x\n", RELOC(pname), l);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* push property head */
|
|
|
|
dt_push_token(OF_DT_PROP, mem_start, mem_end);
|
|
|
|
dt_push_token(l, mem_start, mem_end);
|
|
|
|
dt_push_token(soff, mem_start, mem_end);
|
|
|
|
|
|
|
|
/* push property content */
|
|
|
|
valp = make_room(mem_start, mem_end, l, 4);
|
|
|
|
call_prom("getprop", 4, 1, node, RELOC(pname), valp, l);
|
|
|
|
*mem_start = _ALIGN(*mem_start, 4);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Add a "linux,phandle" property. */
|
|
|
|
soff = dt_find_string(RELOC("linux,phandle"));
|
|
|
|
if (soff == 0)
|
|
|
|
prom_printf("WARNING: Can't find string index for"
|
|
|
|
" <linux-phandle> node %s\n", path);
|
|
|
|
else {
|
|
|
|
dt_push_token(OF_DT_PROP, mem_start, mem_end);
|
|
|
|
dt_push_token(4, mem_start, mem_end);
|
|
|
|
dt_push_token(soff, mem_start, mem_end);
|
|
|
|
valp = make_room(mem_start, mem_end, 4, 4);
|
|
|
|
*(u32 *)valp = node;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* do all our children */
|
|
|
|
child = call_prom("child", 1, 1, node);
|
|
|
|
while (child != 0) {
|
|
|
|
scan_dt_build_struct(child, mem_start, mem_end);
|
|
|
|
child = call_prom("peer", 1, 1, child);
|
|
|
|
}
|
|
|
|
|
|
|
|
dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __init flatten_device_tree(void)
|
|
|
|
{
|
|
|
|
phandle root;
|
|
|
|
unsigned long mem_start, mem_end, room;
|
|
|
|
struct boot_param_header *hdr;
|
|
|
|
struct prom_t *_prom = &RELOC(prom);
|
|
|
|
char *namep;
|
|
|
|
u64 *rsvmap;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check how much room we have between alloc top & bottom (+/- a
|
|
|
|
* few pages), crop to 4Mb, as this is our "chuck" size
|
|
|
|
*/
|
|
|
|
room = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000;
|
|
|
|
if (room > DEVTREE_CHUNK_SIZE)
|
|
|
|
room = DEVTREE_CHUNK_SIZE;
|
|
|
|
prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom));
|
|
|
|
|
|
|
|
/* Now try to claim that */
|
|
|
|
mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
|
|
|
|
if (mem_start == 0)
|
|
|
|
prom_panic("Can't allocate initial device-tree chunk\n");
|
|
|
|
mem_end = RELOC(alloc_top);
|
|
|
|
|
|
|
|
/* Get root of tree */
|
|
|
|
root = call_prom("peer", 1, 1, (phandle)0);
|
|
|
|
if (root == (phandle)0)
|
|
|
|
prom_panic ("couldn't get device tree root\n");
|
|
|
|
|
|
|
|
/* Build header and make room for mem rsv map */
|
|
|
|
mem_start = _ALIGN(mem_start, 4);
|
|
|
|
hdr = make_room(&mem_start, &mem_end,
|
|
|
|
sizeof(struct boot_param_header), 4);
|
|
|
|
RELOC(dt_header_start) = (unsigned long)hdr;
|
|
|
|
rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
|
|
|
|
|
|
|
|
/* Start of strings */
|
|
|
|
mem_start = PAGE_ALIGN(mem_start);
|
|
|
|
RELOC(dt_string_start) = mem_start;
|
|
|
|
mem_start += 4; /* hole */
|
|
|
|
|
|
|
|
/* Add "linux,phandle" in there, we'll need it */
|
|
|
|
namep = make_room(&mem_start, &mem_end, 16, 1);
|
|
|
|
strcpy(namep, RELOC("linux,phandle"));
|
|
|
|
mem_start = (unsigned long)namep + strlen(namep) + 1;
|
|
|
|
|
|
|
|
/* Build string array */
|
|
|
|
prom_printf("Building dt strings...\n");
|
|
|
|
scan_dt_build_strings(root, &mem_start, &mem_end);
|
|
|
|
RELOC(dt_string_end) = mem_start;
|
|
|
|
|
|
|
|
/* Build structure */
|
|
|
|
mem_start = PAGE_ALIGN(mem_start);
|
|
|
|
RELOC(dt_struct_start) = mem_start;
|
|
|
|
prom_printf("Building dt structure...\n");
|
|
|
|
scan_dt_build_struct(root, &mem_start, &mem_end);
|
|
|
|
dt_push_token(OF_DT_END, &mem_start, &mem_end);
|
|
|
|
RELOC(dt_struct_end) = PAGE_ALIGN(mem_start);
|
|
|
|
|
|
|
|
/* Finish header */
|
|
|
|
hdr->boot_cpuid_phys = _prom->cpu;
|
|
|
|
hdr->magic = OF_DT_HEADER;
|
|
|
|
hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start);
|
|
|
|
hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start);
|
|
|
|
hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start);
|
|
|
|
hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start);
|
|
|
|
hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start);
|
|
|
|
hdr->version = OF_DT_VERSION;
|
|
|
|
/* Version 16 is not backward compatible */
|
|
|
|
hdr->last_comp_version = 0x10;
|
|
|
|
|
2006-05-18 18:03:05 -04:00
|
|
|
/* Copy the reserve map in */
|
2005-10-05 22:06:20 -04:00
|
|
|
memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map));
|
|
|
|
|
|
|
|
#ifdef DEBUG_PROM
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
prom_printf("reserved memory map:\n");
|
|
|
|
for (i = 0; i < RELOC(mem_reserve_cnt); i++)
|
|
|
|
prom_printf(" %x - %x\n",
|
|
|
|
RELOC(mem_reserve_map)[i].base,
|
|
|
|
RELOC(mem_reserve_map)[i].size);
|
|
|
|
}
|
|
|
|
#endif
|
2006-05-18 18:03:05 -04:00
|
|
|
/* Bump mem_reserve_cnt to cause further reservations to fail
|
|
|
|
* since it's too late.
|
|
|
|
*/
|
2005-10-05 22:06:20 -04:00
|
|
|
RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE;
|
|
|
|
|
|
|
|
prom_printf("Device tree strings 0x%x -> 0x%x\n",
|
|
|
|
RELOC(dt_string_start), RELOC(dt_string_end));
|
|
|
|
prom_printf("Device tree struct 0x%x -> 0x%x\n",
|
|
|
|
RELOC(dt_struct_start), RELOC(dt_struct_end));
|
|
|
|
|
|
|
|
}
|
|
|
|
|
2006-05-25 17:36:53 -04:00
|
|
|
#ifdef CONFIG_PPC_MAPLE
|
|
|
|
/* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
|
|
|
|
* The values are bad, and it doesn't even have the right number of cells. */
|
|
|
|
static void __init fixup_device_tree_maple(void)
|
2005-10-05 22:06:20 -04:00
|
|
|
{
|
2006-05-25 17:36:53 -04:00
|
|
|
phandle isa;
|
2006-07-03 03:22:05 -04:00
|
|
|
u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
|
2006-05-25 17:36:53 -04:00
|
|
|
u32 isa_ranges[6];
|
2006-07-03 03:22:05 -04:00
|
|
|
char *name;
|
|
|
|
|
|
|
|
name = "/ht@0/isa@4";
|
|
|
|
isa = call_prom("finddevice", 1, 1, ADDR(name));
|
|
|
|
if (!PHANDLE_VALID(isa)) {
|
|
|
|
name = "/ht@0/isa@6";
|
|
|
|
isa = call_prom("finddevice", 1, 1, ADDR(name));
|
|
|
|
rloc = 0x01003000; /* IO space; PCI device = 6 */
|
|
|
|
}
|
2006-05-25 17:36:53 -04:00
|
|
|
if (!PHANDLE_VALID(isa))
|
|
|
|
return;
|
|
|
|
|
2006-07-03 03:22:05 -04:00
|
|
|
if (prom_getproplen(isa, "ranges") != 12)
|
|
|
|
return;
|
2006-05-25 17:36:53 -04:00
|
|
|
if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
|
|
|
|
== PROM_ERROR)
|
|
|
|
return;
|
|
|
|
|
|
|
|
if (isa_ranges[0] != 0x1 ||
|
|
|
|
isa_ranges[1] != 0xf4000000 ||
|
|
|
|
isa_ranges[2] != 0x00010000)
|
|
|
|
return;
|
|
|
|
|
2006-07-03 03:22:05 -04:00
|
|
|
prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
|
2006-05-25 17:36:53 -04:00
|
|
|
|
|
|
|
isa_ranges[0] = 0x1;
|
|
|
|
isa_ranges[1] = 0x0;
|
2006-07-03 03:22:05 -04:00
|
|
|
isa_ranges[2] = rloc;
|
2006-05-25 17:36:53 -04:00
|
|
|
isa_ranges[3] = 0x0;
|
|
|
|
isa_ranges[4] = 0x0;
|
|
|
|
isa_ranges[5] = 0x00010000;
|
2006-07-03 03:22:05 -04:00
|
|
|
prom_setprop(isa, name, "ranges",
|
2006-05-25 17:36:53 -04:00
|
|
|
isa_ranges, sizeof(isa_ranges));
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
#define fixup_device_tree_maple()
|
|
|
|
#endif
|
|
|
|
|
2006-07-04 00:06:29 -04:00
|
|
|
#ifdef CONFIG_PPC_CHRP
|
2007-04-04 12:20:04 -04:00
|
|
|
/*
|
|
|
|
* Pegasos and BriQ lacks the "ranges" property in the isa node
|
|
|
|
* Pegasos needs decimal IRQ 14/15, not hexadecimal
|
2007-08-17 14:27:17 -04:00
|
|
|
* Pegasos has the IDE configured in legacy mode, but advertised as native
|
2007-04-04 12:20:04 -04:00
|
|
|
*/
|
2006-07-04 00:06:29 -04:00
|
|
|
static void __init fixup_device_tree_chrp(void)
|
|
|
|
{
|
2007-04-04 12:20:04 -04:00
|
|
|
phandle ph;
|
|
|
|
u32 prop[6];
|
2006-07-04 00:16:28 -04:00
|
|
|
u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
|
2006-07-04 00:06:29 -04:00
|
|
|
char *name;
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
name = "/pci@80000000/isa@c";
|
2007-04-04 12:20:04 -04:00
|
|
|
ph = call_prom("finddevice", 1, 1, ADDR(name));
|
|
|
|
if (!PHANDLE_VALID(ph)) {
|
2006-07-04 00:16:28 -04:00
|
|
|
name = "/pci@ff500000/isa@6";
|
2007-04-04 12:20:04 -04:00
|
|
|
ph = call_prom("finddevice", 1, 1, ADDR(name));
|
2006-07-04 00:16:28 -04:00
|
|
|
rloc = 0x01003000; /* IO space; PCI device = 6 */
|
|
|
|
}
|
2007-04-04 12:20:04 -04:00
|
|
|
if (PHANDLE_VALID(ph)) {
|
|
|
|
rc = prom_getproplen(ph, "ranges");
|
|
|
|
if (rc == 0 || rc == PROM_ERROR) {
|
|
|
|
prom_printf("Fixing up missing ISA range on Pegasos...\n");
|
|
|
|
|
|
|
|
prop[0] = 0x1;
|
|
|
|
prop[1] = 0x0;
|
|
|
|
prop[2] = rloc;
|
|
|
|
prop[3] = 0x0;
|
|
|
|
prop[4] = 0x0;
|
|
|
|
prop[5] = 0x00010000;
|
|
|
|
prom_setprop(ph, name, "ranges", prop, sizeof(prop));
|
|
|
|
}
|
|
|
|
}
|
2006-07-04 00:06:29 -04:00
|
|
|
|
2007-04-04 12:20:04 -04:00
|
|
|
name = "/pci@80000000/ide@C,1";
|
|
|
|
ph = call_prom("finddevice", 1, 1, ADDR(name));
|
|
|
|
if (PHANDLE_VALID(ph)) {
|
|
|
|
prom_printf("Fixing up IDE interrupt on Pegasos...\n");
|
|
|
|
prop[0] = 14;
|
|
|
|
prop[1] = 0x0;
|
2007-08-17 14:27:17 -04:00
|
|
|
prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
|
|
|
|
prom_printf("Fixing up IDE class-code on Pegasos...\n");
|
|
|
|
rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
|
|
|
|
if (rc == sizeof(u32)) {
|
|
|
|
prop[0] &= ~0x5;
|
|
|
|
prom_setprop(ph, name, "class-code", prop, sizeof(u32));
|
|
|
|
}
|
2007-04-04 12:20:04 -04:00
|
|
|
}
|
2006-07-04 00:06:29 -04:00
|
|
|
}
|
|
|
|
#else
|
|
|
|
#define fixup_device_tree_chrp()
|
|
|
|
#endif
|
|
|
|
|
2005-10-05 22:06:20 -04:00
|
|
|
#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
|
2006-05-25 17:36:53 -04:00
|
|
|
static void __init fixup_device_tree_pmac(void)
|
|
|
|
{
|
2005-10-05 22:06:20 -04:00
|
|
|
phandle u3, i2c, mpic;
|
|
|
|
u32 u3_rev;
|
|
|
|
u32 interrupts[2];
|
|
|
|
u32 parent;
|
|
|
|
|
|
|
|
/* Some G5s have a missing interrupt definition, fix it up here */
|
|
|
|
u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
|
|
|
|
if (!PHANDLE_VALID(u3))
|
|
|
|
return;
|
|
|
|
i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
|
|
|
|
if (!PHANDLE_VALID(i2c))
|
|
|
|
return;
|
|
|
|
mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
|
|
|
|
if (!PHANDLE_VALID(mpic))
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* check if proper rev of u3 */
|
|
|
|
if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
|
|
|
|
== PROM_ERROR)
|
|
|
|
return;
|
2005-11-06 22:36:21 -05:00
|
|
|
if (u3_rev < 0x35 || u3_rev > 0x39)
|
2005-10-05 22:06:20 -04:00
|
|
|
return;
|
|
|
|
/* does it need fixup ? */
|
|
|
|
if (prom_getproplen(i2c, "interrupts") > 0)
|
|
|
|
return;
|
|
|
|
|
|
|
|
prom_printf("fixing up bogus interrupts for u3 i2c...\n");
|
|
|
|
|
|
|
|
/* interrupt on this revision of u3 is number 0 and level */
|
|
|
|
interrupts[0] = 0;
|
|
|
|
interrupts[1] = 1;
|
2005-11-09 20:00:55 -05:00
|
|
|
prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
|
|
|
|
&interrupts, sizeof(interrupts));
|
2005-10-05 22:06:20 -04:00
|
|
|
parent = (u32)mpic;
|
2005-11-09 20:00:55 -05:00
|
|
|
prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
|
|
|
|
&parent, sizeof(parent));
|
2005-10-05 22:06:20 -04:00
|
|
|
}
|
2006-05-25 17:36:53 -04:00
|
|
|
#else
|
|
|
|
#define fixup_device_tree_pmac()
|
|
|
|
#endif
|
2005-10-05 22:06:20 -04:00
|
|
|
|
2007-02-12 17:13:20 -05:00
|
|
|
#ifdef CONFIG_PPC_EFIKA
|
|
|
|
/* The current fw of the Efika has a device tree needs quite a few
|
|
|
|
* fixups to be compliant with the mpc52xx bindings. It's currently
|
|
|
|
* unknown if it will ever be compliant (come on bPlan ...) so we do fixups.
|
|
|
|
* NOTE that we (barely) tolerate it because the EFIKA was out before
|
|
|
|
* the bindings were finished, for any new boards -> RTFM ! */
|
|
|
|
|
|
|
|
struct subst_entry {
|
|
|
|
char *path;
|
|
|
|
char *property;
|
|
|
|
void *value;
|
|
|
|
int value_len;
|
|
|
|
};
|
|
|
|
|
|
|
|
static void __init fixup_device_tree_efika(void)
|
|
|
|
{
|
|
|
|
/* Substitution table */
|
|
|
|
#define prop_cstr(x) x, sizeof(x)
|
|
|
|
int prop_sound_irq[3] = { 2, 2, 0 };
|
|
|
|
int prop_bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
|
|
|
|
3,4,0, 3,5,0, 3,6,0, 3,7,0,
|
|
|
|
3,8,0, 3,9,0, 3,10,0, 3,11,0,
|
|
|
|
3,12,0, 3,13,0, 3,14,0, 3,15,0 };
|
|
|
|
struct subst_entry efika_subst_table[] = {
|
|
|
|
{ "/", "device_type", prop_cstr("efika") },
|
2007-05-06 11:38:50 -04:00
|
|
|
{ "/builtin", "device_type", prop_cstr("soc") },
|
2007-02-12 17:13:20 -05:00
|
|
|
{ "/builtin/ata", "compatible", prop_cstr("mpc5200b-ata\0mpc5200-ata"), },
|
|
|
|
{ "/builtin/bestcomm", "compatible", prop_cstr("mpc5200b-bestcomm\0mpc5200-bestcomm") },
|
|
|
|
{ "/builtin/bestcomm", "interrupts", prop_bcomm_irq, sizeof(prop_bcomm_irq) },
|
|
|
|
{ "/builtin/ethernet", "compatible", prop_cstr("mpc5200b-fec\0mpc5200-fec") },
|
|
|
|
{ "/builtin/pic", "compatible", prop_cstr("mpc5200b-pic\0mpc5200-pic") },
|
|
|
|
{ "/builtin/serial", "compatible", prop_cstr("mpc5200b-psc-uart\0mpc5200-psc-uart") },
|
|
|
|
{ "/builtin/sound", "compatible", prop_cstr("mpc5200b-psc-ac97\0mpc5200-psc-ac97") },
|
|
|
|
{ "/builtin/sound", "interrupts", prop_sound_irq, sizeof(prop_sound_irq) },
|
|
|
|
{ "/builtin/sram", "compatible", prop_cstr("mpc5200b-sram\0mpc5200-sram") },
|
|
|
|
{ "/builtin/sram", "device_type", prop_cstr("sram") },
|
|
|
|
{}
|
|
|
|
};
|
|
|
|
#undef prop_cstr
|
|
|
|
|
|
|
|
/* Vars */
|
|
|
|
u32 node;
|
|
|
|
char prop[64];
|
|
|
|
int rv, i;
|
|
|
|
|
|
|
|
/* Check if we're really running on a EFIKA */
|
|
|
|
node = call_prom("finddevice", 1, 1, ADDR("/"));
|
|
|
|
if (!PHANDLE_VALID(node))
|
|
|
|
return;
|
|
|
|
|
|
|
|
rv = prom_getprop(node, "model", prop, sizeof(prop));
|
|
|
|
if (rv == PROM_ERROR)
|
|
|
|
return;
|
|
|
|
if (strcmp(prop, "EFIKA5K2"))
|
|
|
|
return;
|
|
|
|
|
|
|
|
prom_printf("Applying EFIKA device tree fixups\n");
|
|
|
|
|
|
|
|
/* Process substitution table */
|
|
|
|
for (i=0; efika_subst_table[i].path; i++) {
|
|
|
|
struct subst_entry *se = &efika_subst_table[i];
|
|
|
|
|
|
|
|
node = call_prom("finddevice", 1, 1, ADDR(se->path));
|
|
|
|
if (!PHANDLE_VALID(node)) {
|
|
|
|
prom_printf("fixup_device_tree_efika: ",
|
|
|
|
"skipped entry %x - not found\n", i);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
rv = prom_setprop(node, se->path, se->property,
|
|
|
|
se->value, se->value_len );
|
|
|
|
if (rv == PROM_ERROR)
|
|
|
|
prom_printf("fixup_device_tree_efika: ",
|
|
|
|
"skipped entry %x - setprop error\n", i);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
#define fixup_device_tree_efika()
|
|
|
|
#endif
|
|
|
|
|
2006-05-25 17:36:53 -04:00
|
|
|
static void __init fixup_device_tree(void)
|
|
|
|
{
|
|
|
|
fixup_device_tree_maple();
|
2006-07-04 00:06:29 -04:00
|
|
|
fixup_device_tree_chrp();
|
2006-05-25 17:36:53 -04:00
|
|
|
fixup_device_tree_pmac();
|
2007-02-12 17:13:20 -05:00
|
|
|
fixup_device_tree_efika();
|
2006-05-25 17:36:53 -04:00
|
|
|
}
|
2005-10-05 22:06:20 -04:00
|
|
|
|
|
|
|
static void __init prom_find_boot_cpu(void)
|
|
|
|
{
|
2007-09-06 13:45:21 -04:00
|
|
|
struct prom_t *_prom = &RELOC(prom);
|
2005-10-05 22:06:20 -04:00
|
|
|
u32 getprop_rval;
|
|
|
|
ihandle prom_cpu;
|
|
|
|
phandle cpu_pkg;
|
|
|
|
|
2005-10-23 03:23:21 -04:00
|
|
|
_prom->cpu = 0;
|
2005-10-05 22:06:20 -04:00
|
|
|
if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0)
|
2005-10-23 03:23:21 -04:00
|
|
|
return;
|
2005-10-05 22:06:20 -04:00
|
|
|
|
|
|
|
cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
|
|
|
|
|
|
|
|
prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval));
|
|
|
|
_prom->cpu = getprop_rval;
|
|
|
|
|
|
|
|
prom_debug("Booting CPU hw index = 0x%x\n", _prom->cpu);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
|
|
|
|
{
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
2007-09-06 13:45:21 -04:00
|
|
|
struct prom_t *_prom = &RELOC(prom);
|
2005-10-05 22:06:20 -04:00
|
|
|
|
|
|
|
if (r3 && r4 && r4 != 0xdeadbeef) {
|
|
|
|
unsigned long val;
|
|
|
|
|
2005-12-04 02:39:15 -05:00
|
|
|
RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3;
|
2005-10-05 22:06:20 -04:00
|
|
|
RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4;
|
|
|
|
|
|
|
|
val = RELOC(prom_initrd_start);
|
2005-11-09 20:00:55 -05:00
|
|
|
prom_setprop(_prom->chosen, "/chosen", "linux,initrd-start",
|
|
|
|
&val, sizeof(val));
|
2005-10-05 22:06:20 -04:00
|
|
|
val = RELOC(prom_initrd_end);
|
2005-11-09 20:00:55 -05:00
|
|
|
prom_setprop(_prom->chosen, "/chosen", "linux,initrd-end",
|
|
|
|
&val, sizeof(val));
|
2005-10-05 22:06:20 -04:00
|
|
|
|
|
|
|
reserve_mem(RELOC(prom_initrd_start),
|
|
|
|
RELOC(prom_initrd_end) - RELOC(prom_initrd_start));
|
|
|
|
|
|
|
|
prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start));
|
|
|
|
prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end));
|
|
|
|
}
|
|
|
|
#endif /* CONFIG_BLK_DEV_INITRD */
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We enter here early on, when the Open Firmware prom is still
|
|
|
|
* handling exceptions and the MMU hash table for us.
|
|
|
|
*/
|
|
|
|
|
|
|
|
unsigned long __init prom_init(unsigned long r3, unsigned long r4,
|
|
|
|
unsigned long pp,
|
|
|
|
unsigned long r6, unsigned long r7)
|
|
|
|
{
|
2007-09-06 13:45:21 -04:00
|
|
|
struct prom_t *_prom;
|
2005-10-05 22:06:20 -04:00
|
|
|
unsigned long hdr;
|
2005-10-10 08:37:16 -04:00
|
|
|
unsigned long offset = reloc_offset();
|
2005-10-05 22:06:20 -04:00
|
|
|
|
|
|
|
#ifdef CONFIG_PPC32
|
|
|
|
reloc_got2(offset);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
_prom = &RELOC(prom);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* First zero the BSS
|
|
|
|
*/
|
|
|
|
memset(&RELOC(__bss_start), 0, __bss_stop - __bss_start);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Init interface to Open Firmware, get some node references,
|
|
|
|
* like /chosen
|
|
|
|
*/
|
|
|
|
prom_init_client_services(pp);
|
|
|
|
|
|
|
|
/*
|
2005-11-09 20:00:55 -05:00
|
|
|
* See if this OF is old enough that we need to do explicit maps
|
|
|
|
* and other workarounds
|
2005-10-05 22:06:20 -04:00
|
|
|
*/
|
2005-11-09 20:00:55 -05:00
|
|
|
prom_find_mmu();
|
2005-10-05 22:06:20 -04:00
|
|
|
|
2005-10-23 03:23:21 -04:00
|
|
|
/*
|
2005-11-09 20:00:55 -05:00
|
|
|
* Init prom stdout device
|
2005-10-23 03:23:21 -04:00
|
|
|
*/
|
2005-11-09 20:00:55 -05:00
|
|
|
prom_init_stdout();
|
2005-10-23 03:23:21 -04:00
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2005-10-05 22:06:20 -04:00
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/*
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* Get default machine type. At this point, we do not differentiate
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* between pSeries SMP and pSeries LPAR
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*/
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RELOC(of_platform) = prom_find_machine_type();
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2006-03-23 16:03:57 -05:00
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/* Bail if this is a kdump kernel. */
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if (PHYSICAL_START > 0)
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prom_panic("Error: You can't boot a kdump kernel from OF!\n");
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/*
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* Check for an initrd
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*/
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prom_check_initrd(r3, r4);
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2005-10-05 22:06:20 -04:00
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#ifdef CONFIG_PPC_PSERIES
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/*
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* On pSeries, inform the firmware about our capabilities
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*/
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2005-11-09 21:37:51 -05:00
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if (RELOC(of_platform) == PLATFORM_PSERIES ||
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RELOC(of_platform) == PLATFORM_PSERIES_LPAR)
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2005-10-05 22:06:20 -04:00
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prom_send_capabilities();
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#endif
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/*
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2005-10-31 20:08:37 -05:00
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* Copy the CPU hold code
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2005-10-05 22:06:20 -04:00
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*/
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2007-09-06 13:45:21 -04:00
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if (RELOC(of_platform) != PLATFORM_POWERMAC)
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copy_and_flush(0, KERNELBASE + offset, 0x100, 0);
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2005-10-05 22:06:20 -04:00
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/*
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* Do early parsing of command line
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*/
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early_cmdline_parse();
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/*
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* Initialize memory management within prom_init
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*/
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prom_init_mem();
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/*
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* Determine which cpu is actually running right _now_
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*/
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prom_find_boot_cpu();
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/*
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* Initialize display devices
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*/
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prom_check_displays();
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#ifdef CONFIG_PPC64
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/*
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* Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
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* that uses the allocator, we need to make sure we get the top of memory
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* available for us here...
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*/
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if (RELOC(of_platform) == PLATFORM_PSERIES)
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prom_initialize_tce_table();
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#endif
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/*
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* On non-powermacs, try to instantiate RTAS and puts all CPUs
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* in spin-loops. PowerMacs don't have a working RTAS and use
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* a different way to spin CPUs
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*/
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if (RELOC(of_platform) != PLATFORM_POWERMAC) {
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prom_instantiate_rtas();
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prom_hold_cpus();
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}
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/*
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* Fill in some infos for use by the kernel later on
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*/
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#ifdef CONFIG_PPC64
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2006-11-11 01:25:18 -05:00
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if (RELOC(prom_iommu_off))
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2005-11-09 20:00:55 -05:00
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prom_setprop(_prom->chosen, "/chosen", "linux,iommu-off",
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NULL, 0);
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2005-10-05 22:06:20 -04:00
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2006-11-11 01:25:18 -05:00
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if (RELOC(prom_iommu_force_on))
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2005-11-09 20:00:55 -05:00
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prom_setprop(_prom->chosen, "/chosen", "linux,iommu-force-on",
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NULL, 0);
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2005-10-05 22:06:20 -04:00
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if (RELOC(prom_tce_alloc_start)) {
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2005-11-09 20:00:55 -05:00
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prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-start",
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2005-10-05 22:06:20 -04:00
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&RELOC(prom_tce_alloc_start),
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sizeof(prom_tce_alloc_start));
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2005-11-09 20:00:55 -05:00
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prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-end",
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2005-10-05 22:06:20 -04:00
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&RELOC(prom_tce_alloc_end),
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sizeof(prom_tce_alloc_end));
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}
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#endif
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/*
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* Fixup any known bugs in the device-tree
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*/
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fixup_device_tree();
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/*
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* Now finally create the flattened device-tree
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*/
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prom_printf("copying OF device tree ...\n");
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flatten_device_tree();
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2005-11-08 06:48:08 -05:00
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/*
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* in case stdin is USB and still active on IBM machines...
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* Unfortunately quiesce crashes on some powermacs if we have
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* closed stdin already (in particular the powerbook 101).
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*/
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if (RELOC(of_platform) != PLATFORM_POWERMAC)
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prom_close_stdin();
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2005-10-05 22:06:20 -04:00
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/*
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* Call OF "quiesce" method to shut down pending DMA's from
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* devices etc...
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*/
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prom_printf("Calling quiesce ...\n");
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|
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call_prom("quiesce", 0, 0);
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/*
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|
|
* And finally, call the kernel passing it the flattened device
|
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* tree and NULL as r5, thus triggering the new entry point which
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* is common to us and kexec
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*/
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|
|
hdr = RELOC(dt_header_start);
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|
|
prom_printf("returning from prom_init\n");
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|
|
prom_debug("->dt_header_start=0x%x\n", hdr);
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#ifdef CONFIG_PPC32
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|
|
reloc_got2(-offset);
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|
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#endif
|
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|
|
2005-10-22 02:02:39 -04:00
|
|
|
__start(hdr, KERNELBASE + offset, 0);
|
2005-10-05 22:06:20 -04:00
|
|
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|
|
return 0;
|
|
|
|
}
|