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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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/* * 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);
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_SYSTEM_RAM,};
static struct resource data_resource = { .name = "Kernel data", .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,};
static struct resource bss_resource = { .name = "Kernel bss", .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,};
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}
#ifndef CONFIG_GENERIC_CALIBRATE_DELAYvoid 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);}#endif
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_SYSTEM_RAM | 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 or * the reserved crashkernel region, so 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);#ifdef CONFIG_CRASH_RESERVE request_resource(res, &crashk_res);#endif
/* * 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);
memblock_set_node(PFN_PHYS(start_pfn), PFN_PHYS(end_pfn - start_pfn), &memblock.memory, nid);}
void __init __weak plat_early_device_setup(void){}
#ifdef CONFIG_OF_EARLY_FLATTREEvoid __ref sh_fdt_init(phys_addr_t dt_phys){ static int done = 0; void *dt_virt;
/* Avoid calling an __init function on secondary cpus. */ if (done) return;
#ifdef CONFIG_BUILTIN_DTB dt_virt = __dtb_start;#else dt_virt = phys_to_virt(dt_phys);#endif
if (!dt_virt || !early_init_dt_scan(dt_virt, __pa(dt_virt))) { pr_crit("Error: invalid device tree blob" " at physical address %p\n", (void *)dt_phys);
while (true) cpu_relax(); }
done = 1;}#endif
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;#endif
if (!MOUNT_ROOT_RDONLY) root_mountflags &= ~MS_RDONLY; setup_initial_init_mm(_text, _etext, _edata, _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(__bss_stop)-1;
#ifdef CONFIG_CMDLINE_OVERWRITE strscpy(command_line, CONFIG_CMDLINE, sizeof(command_line));#else strscpy(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 */ sh_early_platform_driver_probe("earlyprintk", 1, 1);
#ifdef CONFIG_OF_EARLY_FLATTREE#ifdef CONFIG_BUILTIN_DTB unflatten_and_copy_device_tree();#else unflatten_device_tree();#endif#endif
paging_init();
/* 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_warn("generic_mode_pins(): missing mode pin configuration\n"); return 0;}
int test_mode_pin(int pin){ return sh_mv.mv_mode_pins() & pin;}
void __init arch_cpu_finalize_init(void){ char *p = &init_utsname()->machine[2]; /* "sh" */
select_idle_routine();
current_cpu_data.loops_per_jiffy = loops_per_jiffy;
switch (current_cpu_data.family) { case CPU_FAMILY_SH2: *p++ = '2'; break; case CPU_FAMILY_SH2A: *p++ = '2'; *p++ = 'a'; break; case CPU_FAMILY_SH3: *p++ = '3'; break; case CPU_FAMILY_SH4: *p++ = '4'; break; case CPU_FAMILY_SH4A: *p++ = '4'; *p++ = 'a'; break; case CPU_FAMILY_SH4AL_DSP: *p++ = '4'; *p++ = 'a'; *p++ = 'l'; *p++ = '-'; *p++ = 'd'; *p++ = 's'; *p++ = 'p'; break; case CPU_FAMILY_UNKNOWN: /* * Specifically use CPU_FAMILY_UNKNOWN rather than * default:, so we're able to have the compiler whine * about unhandled enumerations. */ break; }
pr_info("CPU: %s\n", get_cpu_subtype(¤t_cpu_data));
#ifndef __LITTLE_ENDIAN__ /* 'eb' means 'Endian Big' */ *p++ = 'e'; *p++ = 'b';#endif *p = '\0';}