android_kernel_xiaomi_sm8350/arch/sh64/kernel/setup.c

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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* arch/sh64/kernel/setup.c
*
* sh64 Arch Support
*
* This file handles the architecture-dependent parts of initialization
*
* Copyright (C) 2000, 2001 Paolo Alberelli
* Copyright (C) 2003, 2004 Paul Mundt
*
* benedict.gaster@superh.com: 2nd May 2002
* Modified to use the empty_zero_page to pass command line arguments.
*
* benedict.gaster@superh.com: 3rd May 2002
* Added support for ramdisk, removing statically linked romfs at the same time.
*
* lethal@linux-sh.org: 15th May 2003
* Added generic procfs cpuinfo reporting. Make boards just export their name.
*
* lethal@linux-sh.org: 25th May 2003
* Added generic get_cpu_subtype() for subtype reporting from cpu_data->type.
*
*/
#include <linux/errno.h>
#include <linux/rwsem.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <linux/tty.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/seq_file.h>
#include <linux/blkdev.h>
#include <linux/bootmem.h>
#include <linux/console.h>
#include <linux/root_dev.h>
#include <linux/cpu.h>
#include <linux/initrd.h>
#include <linux/pfn.h>
#include <asm/processor.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/platform.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/sections.h>
#include <asm/setup.h>
#include <asm/smp.h>
#ifdef CONFIG_VT
#include <linux/console.h>
#endif
struct screen_info screen_info;
#ifdef CONFIG_BLK_DEV_RAM
extern int rd_doload; /* 1 = load ramdisk, 0 = don't load */
extern int rd_prompt; /* 1 = prompt for ramdisk, 0 = don't prompt */
extern int rd_image_start; /* starting block # of image */
#endif
extern int root_mountflags;
extern char *get_system_type(void);
extern void platform_setup(void);
extern void platform_monitor(void);
extern void platform_reserve(void);
extern int sh64_cache_init(void);
extern int sh64_tlb_init(void);
#define RAMDISK_IMAGE_START_MASK 0x07FF
#define RAMDISK_PROMPT_FLAG 0x8000
#define RAMDISK_LOAD_FLAG 0x4000
static char command_line[COMMAND_LINE_SIZE] = { 0, };
unsigned long long memory_start = CONFIG_MEMORY_START;
unsigned long long memory_end = CONFIG_MEMORY_START + (CONFIG_MEMORY_SIZE_IN_MB * 1024 * 1024);
struct sh_cpuinfo boot_cpu_data;
static inline void parse_mem_cmdline (char ** cmdline_p)
{
char c = ' ', *to = command_line, *from = COMMAND_LINE;
int len = 0;
/* Save unparsed command line copy for /proc/cmdline */
memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
for (;;) {
/*
* "mem=XXX[kKmM]" defines a size of memory.
*/
if (c == ' ' && !memcmp(from, "mem=", 4)) {
if (to != command_line)
to--;
{
unsigned long mem_size;
mem_size = memparse(from+4, &from);
memory_end = memory_start + mem_size;
}
}
c = *(from++);
if (!c)
break;
if (COMMAND_LINE_SIZE <= ++len)
break;
*(to++) = c;
}
*to = '\0';
*cmdline_p = command_line;
}
static void __init sh64_cpu_type_detect(void)
{
extern unsigned long long peek_real_address_q(unsigned long long addr);
unsigned long long cir;
/* Do peeks in real mode to avoid having to set up a mapping for the
WPC registers. On SH5-101 cut2, such a mapping would be exposed to
an address translation erratum which would make it hard to set up
correctly. */
cir = peek_real_address_q(0x0d000008);
if ((cir & 0xffff) == 0x5103) {
boot_cpu_data.type = CPU_SH5_103;
} else if (((cir >> 32) & 0xffff) == 0x51e2) {
/* CPU.VCR aliased at CIR address on SH5-101 */
boot_cpu_data.type = CPU_SH5_101;
} else {
boot_cpu_data.type = CPU_SH_NONE;
}
}
void __init setup_arch(char **cmdline_p)
{
unsigned long bootmap_size, i;
unsigned long first_pfn, start_pfn, last_pfn, pages;
#ifdef CONFIG_EARLY_PRINTK
extern void enable_early_printk(void);
/*
* Setup Early SCIF console
*/
enable_early_printk();
#endif
/*
* Setup TLB mappings
*/
sh64_tlb_init();
/*
* Caches are already initialized by the time we get here, so we just
* fill in cpu_data info for the caches.
*/
sh64_cache_init();
platform_setup();
platform_monitor();
sh64_cpu_type_detect();
ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
#ifdef CONFIG_BLK_DEV_RAM
rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
#endif
if (!MOUNT_ROOT_RDONLY)
root_mountflags &= ~MS_RDONLY;
init_mm.start_code = (unsigned long) _text;
init_mm.end_code = (unsigned long) _etext;
init_mm.end_data = (unsigned long) _edata;
init_mm.brk = (unsigned long) _end;
code_resource.start = __pa(_text);
code_resource.end = __pa(_etext)-1;
data_resource.start = __pa(_etext);
data_resource.end = __pa(_edata)-1;
parse_mem_cmdline(cmdline_p);
/*
* Find the lowest and highest page frame numbers we have available
*/
first_pfn = PFN_DOWN(memory_start);
last_pfn = PFN_DOWN(memory_end);
pages = last_pfn - first_pfn;
/*
* Partially used pages are not usable - thus
* we are rounding upwards:
*/
start_pfn = PFN_UP(__pa(_end));
/*
* Find a proper area for the bootmem bitmap. After this
* bootstrap step all allocations (until the page allocator
* is intact) must be done via bootmem_alloc().
*/
bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
first_pfn,
last_pfn);
/*
* Round it up.
*/
bootmap_size = PFN_PHYS(PFN_UP(bootmap_size));
/*
* Register fully available RAM pages with the bootmem allocator.
*/
free_bootmem_node(NODE_DATA(0), PFN_PHYS(first_pfn), PFN_PHYS(pages));
/*
* Reserve all kernel sections + bootmem bitmap + a guard page.
*/
reserve_bootmem_node(NODE_DATA(0), PFN_PHYS(first_pfn),
(PFN_PHYS(start_pfn) + bootmap_size + PAGE_SIZE) - PFN_PHYS(first_pfn));
/*
* Reserve platform dependent sections
*/
platform_reserve();
#ifdef CONFIG_BLK_DEV_INITRD
if (LOADER_TYPE && INITRD_START) {
if (INITRD_START + INITRD_SIZE <= (PFN_PHYS(last_pfn))) {
reserve_bootmem_node(NODE_DATA(0), INITRD_START + __MEMORY_START, INITRD_SIZE);
initrd_start =
(long) INITRD_START ? INITRD_START + PAGE_OFFSET + __MEMORY_START : 0;
initrd_end = initrd_start + INITRD_SIZE;
} else {
printk("initrd extends beyond end of memory "
"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
(long) INITRD_START + INITRD_SIZE,
PFN_PHYS(last_pfn));
initrd_start = 0;
}
}
#endif
/*
* Claim all RAM, ROM, and I/O resources.
*/
/* Kernel RAM */
request_resource(&iomem_resource, &code_resource);
request_resource(&iomem_resource, &data_resource);
/* Other KRAM space */
for (i = 0; i < STANDARD_KRAM_RESOURCES - 2; i++)
request_resource(&iomem_resource,
&platform_parms.kram_res_p[i]);
/* XRAM space */
for (i = 0; i < STANDARD_XRAM_RESOURCES; i++)
request_resource(&iomem_resource,
&platform_parms.xram_res_p[i]);
/* ROM space */
for (i = 0; i < STANDARD_ROM_RESOURCES; i++)
request_resource(&iomem_resource,
&platform_parms.rom_res_p[i]);
/* I/O space */
for (i = 0; i < STANDARD_IO_RESOURCES; i++)
request_resource(&ioport_resource,
&platform_parms.io_res_p[i]);
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
conswitchp = &vga_con;
#elif defined(CONFIG_DUMMY_CONSOLE)
conswitchp = &dummy_con;
#endif
#endif
printk("Hardware FPU: %s\n", fpu_in_use ? "enabled" : "disabled");
paging_init();
}
void __xchg_called_with_bad_pointer(void)
{
printk(KERN_EMERG "xchg() called with bad pointer !\n");
}
static struct cpu cpu[1];
static int __init topology_init(void)
{
[PATCH] node hotplug: register cpu: remove node struct With Goto-san's patch, we can add new pgdat/node at runtime. I'm now considering node-hot-add with cpu + memory on ACPI. I found acpi container, which describes node, could evaluate cpu before memory. This means cpu-hot-add occurs before memory hot add. In most part, cpu-hot-add doesn't depend on node hot add. But register_cpu(), which creates symbolic link from node to cpu, requires that node should be onlined before register_cpu(). When a node is onlined, its pgdat should be there. This patch-set holds off creating symbolic link from node to cpu until node is onlined. This removes node arguments from register_cpu(). Now, register_cpu() requires 'struct node' as its argument. But the array of struct node is now unified in driver/base/node.c now (By Goto's node hotplug patch). We can get struct node in generic way. So, this argument is not necessary now. This patch also guarantees add cpu under node only when node is onlined. It is necessary for node-hot-add vs. cpu-hot-add patch following this. Moreover, register_cpu calculates cpu->node_id by cpu_to_node() without regard to its 'struct node *root' argument. This patch removes it. Also modify callers of register_cpu()/unregister_cpu, whose args are changed by register-cpu-remove-node-struct patch. [Brice.Goglin@ens-lyon.org: fix it] Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Ashok Raj <ashok.raj@intel.com> Cc: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Brice Goglin <Brice.Goglin@ens-lyon.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-27 05:53:41 -04:00
return register_cpu(cpu, 0);
}
subsys_initcall(topology_init);
/*
* Get CPU information
*/
static const char *cpu_name[] = {
[CPU_SH5_101] = "SH5-101",
[CPU_SH5_103] = "SH5-103",
[CPU_SH_NONE] = "Unknown",
};
const char *get_cpu_subtype(void)
{
return cpu_name[boot_cpu_data.type];
}
#ifdef CONFIG_PROC_FS
static int show_cpuinfo(struct seq_file *m,void *v)
{
unsigned int cpu = smp_processor_id();
if (!cpu)
seq_printf(m, "machine\t\t: %s\n", get_system_type());
seq_printf(m, "processor\t: %d\n", cpu);
seq_printf(m, "cpu family\t: SH-5\n");
seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype());
seq_printf(m, "icache size\t: %dK-bytes\n",
(boot_cpu_data.icache.ways *
boot_cpu_data.icache.sets *
boot_cpu_data.icache.linesz) >> 10);
seq_printf(m, "dcache size\t: %dK-bytes\n",
(boot_cpu_data.dcache.ways *
boot_cpu_data.dcache.sets *
boot_cpu_data.dcache.linesz) >> 10);
seq_printf(m, "itlb entries\t: %d\n", boot_cpu_data.itlb.entries);
seq_printf(m, "dtlb entries\t: %d\n", boot_cpu_data.dtlb.entries);
#define PRINT_CLOCK(name, value) \
seq_printf(m, name " clock\t: %d.%02dMHz\n", \
((value) / 1000000), ((value) % 1000000)/10000)
PRINT_CLOCK("cpu", boot_cpu_data.cpu_clock);
PRINT_CLOCK("bus", boot_cpu_data.bus_clock);
PRINT_CLOCK("module", boot_cpu_data.module_clock);
seq_printf(m, "bogomips\t: %lu.%02lu\n\n",
(loops_per_jiffy*HZ+2500)/500000,
((loops_per_jiffy*HZ+2500)/5000) % 100);
return 0;
}
static void *c_start(struct seq_file *m, loff_t *pos)
{
return (void*)(*pos == 0);
}
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
return NULL;
}
static void c_stop(struct seq_file *m, void *v)
{
}
struct seq_operations cpuinfo_op = {
.start = c_start,
.next = c_next,
.stop = c_stop,
.show = show_cpuinfo,
};
#endif /* CONFIG_PROC_FS */