560dbf34de
[ Upstream commit d63bd8c81d8ab64db506ffde569cc8ff197516e2 ]
The m68k nommu setup code didn't register the beginning of the physical
memory with memblock because it was anyway occupied by the kernel. However,
commit fa3354e4ea39 ("mm: free_area_init: use maximal zone PFNs rather than
zone sizes") changed zones initialization to use memblock.memory to detect
the zone extents and this caused inconsistency between zone PFNs and the
actual PFNs:
BUG: Bad page state in process swapper pfn:20165
page:41fe0ca0 refcount:0 mapcount:1 mapping:00000000 index:0x0 flags: 0x0()
raw: 00000000 00000100 00000122 00000000 00000000 00000000 00000000 00000000
page dumped because: nonzero mapcount
CPU: 0 PID: 1 Comm: swapper Not tainted 5.8.0-rc1-00001-g3a38f8a60c65-dirty #1
Stack from 404c9ebc:
404c9ebc 4029ab28 4029ab28 40088470 41fe0ca0 40299e21 40299df1 404ba2a4
00020165 00000000 41fd2c10 402c7ba0 41fd2c04 40088504 41fe0ca0 40299e21
00000000 40088a12 41fe0ca0 41fe0ca4 0000020a 00000000 00000001 402ca000
00000000 41fe0ca0 41fd2c10 41fd2c10 00000000 00000000 402b2388 00000001
400a0934 40091056 404c9f44 404c9f44 40088db4 402c7ba0 00000001 41fd2c04
41fe0ca0 41fd2000 41fe0ca0 40089e02 4026ecf4 40089e4e 41fe0ca0 ffffffff
Call Trace:
[<40088470>] 0x40088470
[<40088504>] 0x40088504
[<40088a12>] 0x40088a12
[<402ca000>] 0x402ca000
[<400a0934>] 0x400a0934
Adjust the memory registration with memblock to include the beginning of
the physical memory and make sure that the area occupied by the kernel is
marked as reserved.
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
224 lines
6.0 KiB
C
224 lines
6.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/arch/m68knommu/kernel/setup.c
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*
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* Copyright (C) 1999-2007 Greg Ungerer (gerg@snapgear.com)
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* Copyright (C) 1998,1999 D. Jeff Dionne <jeff@uClinux.org>
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* Copyleft ()) 2000 James D. Schettine {james@telos-systems.com}
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* Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com>
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* Copyright (C) 1995 Hamish Macdonald
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* Copyright (C) 2000 Lineo Inc. (www.lineo.com)
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* Copyright (C) 2001 Lineo, Inc. <www.lineo.com>
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*
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* 68VZ328 Fixes/support Evan Stawnyczy <e@lineo.ca>
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*/
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/*
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* This file handles the architecture-dependent parts of system setup
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/fb.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/console.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/memblock.h>
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#include <linux/seq_file.h>
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#include <linux/init.h>
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#include <linux/initrd.h>
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#include <linux/root_dev.h>
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#include <linux/rtc.h>
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#include <asm/setup.h>
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#include <asm/bootinfo.h>
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#include <asm/irq.h>
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#include <asm/machdep.h>
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#include <asm/pgtable.h>
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#include <asm/sections.h>
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unsigned long memory_start;
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unsigned long memory_end;
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EXPORT_SYMBOL(memory_start);
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EXPORT_SYMBOL(memory_end);
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char __initdata command_line[COMMAND_LINE_SIZE];
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/* machine dependent timer functions */
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void (*mach_sched_init)(irq_handler_t handler) __initdata = NULL;
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int (*mach_hwclk) (int, struct rtc_time*);
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/* machine dependent reboot functions */
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void (*mach_reset)(void);
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void (*mach_halt)(void);
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void (*mach_power_off)(void);
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#ifdef CONFIG_M68000
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#if defined(CONFIG_M68328)
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#define CPU_NAME "MC68328"
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#elif defined(CONFIG_M68EZ328)
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#define CPU_NAME "MC68EZ328"
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#elif defined(CONFIG_M68VZ328)
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#define CPU_NAME "MC68VZ328"
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#else
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#define CPU_NAME "MC68000"
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#endif
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#endif /* CONFIG_M68000 */
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#ifndef CPU_NAME
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#define CPU_NAME "UNKNOWN"
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#endif
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/*
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* Different cores have different instruction execution timings.
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* The old/traditional 68000 cores are basically all the same, at 16.
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* The ColdFire cores vary a little, their values are defined in their
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* headers. We default to the standard 68000 value here.
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*/
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#ifndef CPU_INSTR_PER_JIFFY
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#define CPU_INSTR_PER_JIFFY 16
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#endif
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void __init setup_arch(char **cmdline_p)
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{
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memory_start = PAGE_ALIGN(_ramstart);
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memory_end = _ramend;
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init_mm.start_code = (unsigned long) &_stext;
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init_mm.end_code = (unsigned long) &_etext;
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init_mm.end_data = (unsigned long) &_edata;
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init_mm.brk = (unsigned long) 0;
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config_BSP(&command_line[0], sizeof(command_line));
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#if defined(CONFIG_BOOTPARAM)
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strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
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command_line[sizeof(command_line) - 1] = 0;
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#endif /* CONFIG_BOOTPARAM */
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process_uboot_commandline(&command_line[0], sizeof(command_line));
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pr_info("uClinux with CPU " CPU_NAME "\n");
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#ifdef CONFIG_UCDIMM
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pr_info("uCdimm by Lineo, Inc. <www.lineo.com>\n");
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#endif
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#ifdef CONFIG_M68VZ328
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pr_info("M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
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#endif
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#ifdef CONFIG_COLDFIRE
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pr_info("COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
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#ifdef CONFIG_M5307
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pr_info("Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
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#endif
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#ifdef CONFIG_ELITE
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pr_info("Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
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#endif
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#endif
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pr_info("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
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#if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
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pr_info("TRG SuperPilot FLASH card support <info@trgnet.com>\n");
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#endif
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#if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
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pr_info("PalmV support by Lineo Inc. <jeff@uclinux.com>\n");
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#endif
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#ifdef CONFIG_DRAGEN2
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pr_info("DragonEngine II board support by Georges Menie\n");
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#endif
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#ifdef CONFIG_M5235EVB
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pr_info("Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
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#endif
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pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n",
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_stext, _etext, _sdata, _edata, __bss_start, __bss_stop);
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pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n ",
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__bss_stop, memory_start, memory_start, memory_end);
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memblock_add(_rambase, memory_end - _rambase);
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memblock_reserve(_rambase, memory_start - _rambase);
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/* Keep a copy of command line */
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*cmdline_p = &command_line[0];
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memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
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boot_command_line[COMMAND_LINE_SIZE-1] = 0;
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#if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE)
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conswitchp = &dummy_con;
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#endif
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/*
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* Give all the memory to the bootmap allocator, tell it to put the
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* boot mem_map at the start of memory.
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*/
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min_low_pfn = PFN_DOWN(memory_start);
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max_pfn = max_low_pfn = PFN_DOWN(memory_end);
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#if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
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if ((initrd_start > 0) && (initrd_start < initrd_end) &&
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(initrd_end < memory_end))
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memblock_reserve(initrd_start, initrd_end - initrd_start);
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#endif /* if defined(CONFIG_BLK_DEV_INITRD) */
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/*
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* Get kmalloc into gear.
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*/
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paging_init();
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}
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/*
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* Get CPU information for use by the procfs.
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*/
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static int show_cpuinfo(struct seq_file *m, void *v)
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{
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char *cpu, *mmu, *fpu;
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u_long clockfreq;
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cpu = CPU_NAME;
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mmu = "none";
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fpu = "none";
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clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY;
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seq_printf(m, "CPU:\t\t%s\n"
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"MMU:\t\t%s\n"
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"FPU:\t\t%s\n"
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"Clocking:\t%lu.%1luMHz\n"
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"BogoMips:\t%lu.%02lu\n"
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"Calibration:\t%lu loops\n",
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cpu, mmu, fpu,
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clockfreq / 1000000,
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(clockfreq / 100000) % 10,
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(loops_per_jiffy * HZ) / 500000,
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((loops_per_jiffy * HZ) / 5000) % 100,
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(loops_per_jiffy * HZ));
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return 0;
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}
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static void *c_start(struct seq_file *m, loff_t *pos)
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{
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return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
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}
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static void *c_next(struct seq_file *m, void *v, loff_t *pos)
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{
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++*pos;
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return c_start(m, pos);
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}
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static void c_stop(struct seq_file *m, void *v)
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{
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}
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const struct seq_operations cpuinfo_op = {
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.start = c_start,
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.next = c_next,
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.stop = c_stop,
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.show = show_cpuinfo,
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};
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