mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-31 00:17:44 +00:00
25985edced
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
320 lines
7.7 KiB
C
320 lines
7.7 KiB
C
/*
|
|
* arch/sh/kernel/setup.c
|
|
*
|
|
* This file handles the architecture-dependent parts of initialization
|
|
*
|
|
* Copyright (C) 1999 Niibe Yutaka
|
|
* Copyright (C) 2002 - 2010 Paul Mundt
|
|
*/
|
|
#include <linux/screen_info.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/init.h>
|
|
#include <linux/initrd.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/console.h>
|
|
#include <linux/root_dev.h>
|
|
#include <linux/utsname.h>
|
|
#include <linux/nodemask.h>
|
|
#include <linux/cpu.h>
|
|
#include <linux/pfn.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/kexec.h>
|
|
#include <linux/module.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/err.h>
|
|
#include <linux/crash_dump.h>
|
|
#include <linux/mmzone.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/memblock.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/io.h>
|
|
#include <asm/page.h>
|
|
#include <asm/elf.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/clock.h>
|
|
#include <asm/smp.h>
|
|
#include <asm/mmu_context.h>
|
|
#include <asm/mmzone.h>
|
|
#include <asm/sparsemem.h>
|
|
|
|
/*
|
|
* Initialize loops_per_jiffy as 10000000 (1000MIPS).
|
|
* This value will be used at the very early stage of serial setup.
|
|
* The bigger value means no problem.
|
|
*/
|
|
struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = {
|
|
[0] = {
|
|
.type = CPU_SH_NONE,
|
|
.family = CPU_FAMILY_UNKNOWN,
|
|
.loops_per_jiffy = 10000000,
|
|
.phys_bits = MAX_PHYSMEM_BITS,
|
|
},
|
|
};
|
|
EXPORT_SYMBOL(cpu_data);
|
|
|
|
/*
|
|
* The machine vector. First entry in .machvec.init, or clobbered by
|
|
* sh_mv= on the command line, prior to .machvec.init teardown.
|
|
*/
|
|
struct sh_machine_vector sh_mv = { .mv_name = "generic", };
|
|
EXPORT_SYMBOL(sh_mv);
|
|
|
|
#ifdef CONFIG_VT
|
|
struct screen_info screen_info;
|
|
#endif
|
|
|
|
extern int root_mountflags;
|
|
|
|
#define RAMDISK_IMAGE_START_MASK 0x07FF
|
|
#define RAMDISK_PROMPT_FLAG 0x8000
|
|
#define RAMDISK_LOAD_FLAG 0x4000
|
|
|
|
static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
|
|
|
|
static struct resource code_resource = {
|
|
.name = "Kernel code",
|
|
.flags = IORESOURCE_BUSY | IORESOURCE_MEM,
|
|
};
|
|
|
|
static struct resource data_resource = {
|
|
.name = "Kernel data",
|
|
.flags = IORESOURCE_BUSY | IORESOURCE_MEM,
|
|
};
|
|
|
|
static struct resource bss_resource = {
|
|
.name = "Kernel bss",
|
|
.flags = IORESOURCE_BUSY | IORESOURCE_MEM,
|
|
};
|
|
|
|
unsigned long memory_start;
|
|
EXPORT_SYMBOL(memory_start);
|
|
unsigned long memory_end = 0;
|
|
EXPORT_SYMBOL(memory_end);
|
|
unsigned long memory_limit = 0;
|
|
|
|
static struct resource mem_resources[MAX_NUMNODES];
|
|
|
|
int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
|
|
|
|
static int __init early_parse_mem(char *p)
|
|
{
|
|
if (!p)
|
|
return 1;
|
|
|
|
memory_limit = PAGE_ALIGN(memparse(p, &p));
|
|
|
|
pr_notice("Memory limited to %ldMB\n", memory_limit >> 20);
|
|
|
|
return 0;
|
|
}
|
|
early_param("mem", early_parse_mem);
|
|
|
|
void __init check_for_initrd(void)
|
|
{
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
unsigned long start, end;
|
|
|
|
/*
|
|
* Check for the rare cases where boot loaders adhere to the boot
|
|
* ABI.
|
|
*/
|
|
if (!LOADER_TYPE || !INITRD_START || !INITRD_SIZE)
|
|
goto disable;
|
|
|
|
start = INITRD_START + __MEMORY_START;
|
|
end = start + INITRD_SIZE;
|
|
|
|
if (unlikely(end <= start))
|
|
goto disable;
|
|
if (unlikely(start & ~PAGE_MASK)) {
|
|
pr_err("initrd must be page aligned\n");
|
|
goto disable;
|
|
}
|
|
|
|
if (unlikely(start < __MEMORY_START)) {
|
|
pr_err("initrd start (%08lx) < __MEMORY_START(%x)\n",
|
|
start, __MEMORY_START);
|
|
goto disable;
|
|
}
|
|
|
|
if (unlikely(end > memblock_end_of_DRAM())) {
|
|
pr_err("initrd extends beyond end of memory "
|
|
"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
|
|
end, (unsigned long)memblock_end_of_DRAM());
|
|
goto disable;
|
|
}
|
|
|
|
/*
|
|
* If we got this far in spite of the boot loader's best efforts
|
|
* to the contrary, assume we actually have a valid initrd and
|
|
* fix up the root dev.
|
|
*/
|
|
ROOT_DEV = Root_RAM0;
|
|
|
|
/*
|
|
* Address sanitization
|
|
*/
|
|
initrd_start = (unsigned long)__va(start);
|
|
initrd_end = initrd_start + INITRD_SIZE;
|
|
|
|
memblock_reserve(__pa(initrd_start), INITRD_SIZE);
|
|
|
|
return;
|
|
|
|
disable:
|
|
pr_info("initrd disabled\n");
|
|
initrd_start = initrd_end = 0;
|
|
#endif
|
|
}
|
|
|
|
void __cpuinit calibrate_delay(void)
|
|
{
|
|
struct clk *clk = clk_get(NULL, "cpu_clk");
|
|
|
|
if (IS_ERR(clk))
|
|
panic("Need a sane CPU clock definition!");
|
|
|
|
loops_per_jiffy = (clk_get_rate(clk) >> 1) / HZ;
|
|
|
|
printk(KERN_INFO "Calibrating delay loop (skipped)... "
|
|
"%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n",
|
|
loops_per_jiffy/(500000/HZ),
|
|
(loops_per_jiffy/(5000/HZ)) % 100,
|
|
loops_per_jiffy);
|
|
}
|
|
|
|
void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
|
|
unsigned long end_pfn)
|
|
{
|
|
struct resource *res = &mem_resources[nid];
|
|
unsigned long start, end;
|
|
|
|
WARN_ON(res->name); /* max one active range per node for now */
|
|
|
|
start = start_pfn << PAGE_SHIFT;
|
|
end = end_pfn << PAGE_SHIFT;
|
|
|
|
res->name = "System RAM";
|
|
res->start = start;
|
|
res->end = end - 1;
|
|
res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
|
|
|
|
if (request_resource(&iomem_resource, res)) {
|
|
pr_err("unable to request memory_resource 0x%lx 0x%lx\n",
|
|
start_pfn, end_pfn);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* We don't know which RAM region contains kernel data,
|
|
* so we try it repeatedly and let the resource manager
|
|
* test it.
|
|
*/
|
|
request_resource(res, &code_resource);
|
|
request_resource(res, &data_resource);
|
|
request_resource(res, &bss_resource);
|
|
|
|
/*
|
|
* Also make sure that there is a PMB mapping that covers this
|
|
* range before we attempt to activate it, to avoid reset by MMU.
|
|
* We can hit this path with NUMA or memory hot-add.
|
|
*/
|
|
pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
|
|
PAGE_KERNEL);
|
|
|
|
add_active_range(nid, start_pfn, end_pfn);
|
|
}
|
|
|
|
void __init __weak plat_early_device_setup(void)
|
|
{
|
|
}
|
|
|
|
void __init setup_arch(char **cmdline_p)
|
|
{
|
|
enable_mmu();
|
|
|
|
ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
|
|
|
|
printk(KERN_NOTICE "Boot params:\n"
|
|
"... MOUNT_ROOT_RDONLY - %08lx\n"
|
|
"... RAMDISK_FLAGS - %08lx\n"
|
|
"... ORIG_ROOT_DEV - %08lx\n"
|
|
"... LOADER_TYPE - %08lx\n"
|
|
"... INITRD_START - %08lx\n"
|
|
"... INITRD_SIZE - %08lx\n",
|
|
MOUNT_ROOT_RDONLY, RAMDISK_FLAGS,
|
|
ORIG_ROOT_DEV, LOADER_TYPE,
|
|
INITRD_START, INITRD_SIZE);
|
|
|
|
#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 = virt_to_phys(_text);
|
|
code_resource.end = virt_to_phys(_etext)-1;
|
|
data_resource.start = virt_to_phys(_etext);
|
|
data_resource.end = virt_to_phys(_edata)-1;
|
|
bss_resource.start = virt_to_phys(__bss_start);
|
|
bss_resource.end = virt_to_phys(_ebss)-1;
|
|
|
|
#ifdef CONFIG_CMDLINE_OVERWRITE
|
|
strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
|
|
#else
|
|
strlcpy(command_line, COMMAND_LINE, sizeof(command_line));
|
|
#ifdef CONFIG_CMDLINE_EXTEND
|
|
strlcat(command_line, " ", sizeof(command_line));
|
|
strlcat(command_line, CONFIG_CMDLINE, sizeof(command_line));
|
|
#endif
|
|
#endif
|
|
|
|
/* Save unparsed command line copy for /proc/cmdline */
|
|
memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
|
|
*cmdline_p = command_line;
|
|
|
|
parse_early_param();
|
|
|
|
plat_early_device_setup();
|
|
|
|
sh_mv_setup();
|
|
|
|
/* Let earlyprintk output early console messages */
|
|
early_platform_driver_probe("earlyprintk", 1, 1);
|
|
|
|
paging_init();
|
|
|
|
#ifdef CONFIG_DUMMY_CONSOLE
|
|
conswitchp = &dummy_con;
|
|
#endif
|
|
|
|
/* Perform the machine specific initialisation */
|
|
if (likely(sh_mv.mv_setup))
|
|
sh_mv.mv_setup(cmdline_p);
|
|
|
|
plat_smp_setup();
|
|
}
|
|
|
|
/* processor boot mode configuration */
|
|
int generic_mode_pins(void)
|
|
{
|
|
pr_warning("generic_mode_pins(): missing mode pin configuration\n");
|
|
return 0;
|
|
}
|
|
|
|
int test_mode_pin(int pin)
|
|
{
|
|
return sh_mv.mv_mode_pins() & pin;
|
|
}
|