11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/arch/arm/kernel/setup.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (C) 1995-2001 Russell King 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 71da177e4SLinus Torvalds * it under the terms of the GNU General Public License version 2 as 81da177e4SLinus Torvalds * published by the Free Software Foundation. 91da177e4SLinus Torvalds */ 101da177e4SLinus Torvalds #include <linux/module.h> 111da177e4SLinus Torvalds #include <linux/kernel.h> 121da177e4SLinus Torvalds #include <linux/stddef.h> 131da177e4SLinus Torvalds #include <linux/ioport.h> 141da177e4SLinus Torvalds #include <linux/delay.h> 151da177e4SLinus Torvalds #include <linux/utsname.h> 161da177e4SLinus Torvalds #include <linux/initrd.h> 171da177e4SLinus Torvalds #include <linux/console.h> 181da177e4SLinus Torvalds #include <linux/bootmem.h> 191da177e4SLinus Torvalds #include <linux/seq_file.h> 20894673eeSJon Smirl #include <linux/screen_info.h> 211da177e4SLinus Torvalds #include <linux/init.h> 221da177e4SLinus Torvalds #include <linux/root_dev.h> 231da177e4SLinus Torvalds #include <linux/cpu.h> 241da177e4SLinus Torvalds #include <linux/interrupt.h> 257bbb7940SRussell King #include <linux/smp.h> 261da177e4SLinus Torvalds 271da177e4SLinus Torvalds #include <asm/cpu.h> 281da177e4SLinus Torvalds #include <asm/elf.h> 291da177e4SLinus Torvalds #include <asm/procinfo.h> 301da177e4SLinus Torvalds #include <asm/setup.h> 311da177e4SLinus Torvalds #include <asm/mach-types.h> 321da177e4SLinus Torvalds #include <asm/cacheflush.h> 331da177e4SLinus Torvalds #include <asm/tlbflush.h> 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds #include <asm/mach/arch.h> 361da177e4SLinus Torvalds #include <asm/mach/irq.h> 371da177e4SLinus Torvalds #include <asm/mach/time.h> 381da177e4SLinus Torvalds 390fc1c832SBen Dooks #include "compat.h" 400fc1c832SBen Dooks 411da177e4SLinus Torvalds #ifndef MEM_SIZE 421da177e4SLinus Torvalds #define MEM_SIZE (16*1024*1024) 431da177e4SLinus Torvalds #endif 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds #if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE) 461da177e4SLinus Torvalds char fpe_type[8]; 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds static int __init fpe_setup(char *line) 491da177e4SLinus Torvalds { 501da177e4SLinus Torvalds memcpy(fpe_type, line, 8); 511da177e4SLinus Torvalds return 1; 521da177e4SLinus Torvalds } 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds __setup("fpe=", fpe_setup); 551da177e4SLinus Torvalds #endif 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds extern void paging_init(struct meminfo *, struct machine_desc *desc); 581da177e4SLinus Torvalds extern void reboot_setup(char *str); 591da177e4SLinus Torvalds extern int root_mountflags; 601da177e4SLinus Torvalds extern void _stext, _text, _etext, __data_start, _edata, _end; 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds unsigned int processor_id; 631da177e4SLinus Torvalds unsigned int __machine_arch_type; 641da177e4SLinus Torvalds EXPORT_SYMBOL(__machine_arch_type); 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds unsigned int system_rev; 671da177e4SLinus Torvalds EXPORT_SYMBOL(system_rev); 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds unsigned int system_serial_low; 701da177e4SLinus Torvalds EXPORT_SYMBOL(system_serial_low); 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds unsigned int system_serial_high; 731da177e4SLinus Torvalds EXPORT_SYMBOL(system_serial_high); 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds unsigned int elf_hwcap; 761da177e4SLinus Torvalds EXPORT_SYMBOL(elf_hwcap); 771da177e4SLinus Torvalds 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds #ifdef MULTI_CPU 801da177e4SLinus Torvalds struct processor processor; 811da177e4SLinus Torvalds #endif 821da177e4SLinus Torvalds #ifdef MULTI_TLB 831da177e4SLinus Torvalds struct cpu_tlb_fns cpu_tlb; 841da177e4SLinus Torvalds #endif 851da177e4SLinus Torvalds #ifdef MULTI_USER 861da177e4SLinus Torvalds struct cpu_user_fns cpu_user; 871da177e4SLinus Torvalds #endif 881da177e4SLinus Torvalds #ifdef MULTI_CACHE 891da177e4SLinus Torvalds struct cpu_cache_fns cpu_cache; 901da177e4SLinus Torvalds #endif 91953233dcSCatalin Marinas #ifdef CONFIG_OUTER_CACHE 92953233dcSCatalin Marinas struct outer_cache_fns outer_cache; 93953233dcSCatalin Marinas #endif 941da177e4SLinus Torvalds 95ccea7a19SRussell King struct stack { 96ccea7a19SRussell King u32 irq[3]; 97ccea7a19SRussell King u32 abt[3]; 98ccea7a19SRussell King u32 und[3]; 99ccea7a19SRussell King } ____cacheline_aligned; 100ccea7a19SRussell King 101ccea7a19SRussell King static struct stack stacks[NR_CPUS]; 102ccea7a19SRussell King 1031da177e4SLinus Torvalds char elf_platform[ELF_PLATFORM_SIZE]; 1041da177e4SLinus Torvalds EXPORT_SYMBOL(elf_platform); 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds unsigned long phys_initrd_start __initdata = 0; 1071da177e4SLinus Torvalds unsigned long phys_initrd_size __initdata = 0; 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds static struct meminfo meminfo __initdata = { 0, }; 1101da177e4SLinus Torvalds static const char *cpu_name; 1111da177e4SLinus Torvalds static const char *machine_name; 112cd81899aSAlon Bar-Lev static char __initdata command_line[COMMAND_LINE_SIZE]; 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE; 1151da177e4SLinus Torvalds static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } }; 1161da177e4SLinus Torvalds #define ENDIANNESS ((char)endian_test.l) 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds DEFINE_PER_CPU(struct cpuinfo_arm, cpu_data); 1191da177e4SLinus Torvalds 1201da177e4SLinus Torvalds /* 1211da177e4SLinus Torvalds * Standard memory resources 1221da177e4SLinus Torvalds */ 1231da177e4SLinus Torvalds static struct resource mem_res[] = { 124740e518eSGreg Kroah-Hartman { 125740e518eSGreg Kroah-Hartman .name = "Video RAM", 126740e518eSGreg Kroah-Hartman .start = 0, 127740e518eSGreg Kroah-Hartman .end = 0, 128740e518eSGreg Kroah-Hartman .flags = IORESOURCE_MEM 129740e518eSGreg Kroah-Hartman }, 130740e518eSGreg Kroah-Hartman { 131740e518eSGreg Kroah-Hartman .name = "Kernel text", 132740e518eSGreg Kroah-Hartman .start = 0, 133740e518eSGreg Kroah-Hartman .end = 0, 134740e518eSGreg Kroah-Hartman .flags = IORESOURCE_MEM 135740e518eSGreg Kroah-Hartman }, 136740e518eSGreg Kroah-Hartman { 137740e518eSGreg Kroah-Hartman .name = "Kernel data", 138740e518eSGreg Kroah-Hartman .start = 0, 139740e518eSGreg Kroah-Hartman .end = 0, 140740e518eSGreg Kroah-Hartman .flags = IORESOURCE_MEM 141740e518eSGreg Kroah-Hartman } 1421da177e4SLinus Torvalds }; 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds #define video_ram mem_res[0] 1451da177e4SLinus Torvalds #define kernel_code mem_res[1] 1461da177e4SLinus Torvalds #define kernel_data mem_res[2] 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds static struct resource io_res[] = { 149740e518eSGreg Kroah-Hartman { 150740e518eSGreg Kroah-Hartman .name = "reserved", 151740e518eSGreg Kroah-Hartman .start = 0x3bc, 152740e518eSGreg Kroah-Hartman .end = 0x3be, 153740e518eSGreg Kroah-Hartman .flags = IORESOURCE_IO | IORESOURCE_BUSY 154740e518eSGreg Kroah-Hartman }, 155740e518eSGreg Kroah-Hartman { 156740e518eSGreg Kroah-Hartman .name = "reserved", 157740e518eSGreg Kroah-Hartman .start = 0x378, 158740e518eSGreg Kroah-Hartman .end = 0x37f, 159740e518eSGreg Kroah-Hartman .flags = IORESOURCE_IO | IORESOURCE_BUSY 160740e518eSGreg Kroah-Hartman }, 161740e518eSGreg Kroah-Hartman { 162740e518eSGreg Kroah-Hartman .name = "reserved", 163740e518eSGreg Kroah-Hartman .start = 0x278, 164740e518eSGreg Kroah-Hartman .end = 0x27f, 165740e518eSGreg Kroah-Hartman .flags = IORESOURCE_IO | IORESOURCE_BUSY 166740e518eSGreg Kroah-Hartman } 1671da177e4SLinus Torvalds }; 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds #define lp0 io_res[0] 1701da177e4SLinus Torvalds #define lp1 io_res[1] 1711da177e4SLinus Torvalds #define lp2 io_res[2] 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds static const char *cache_types[16] = { 1741da177e4SLinus Torvalds "write-through", 1751da177e4SLinus Torvalds "write-back", 1761da177e4SLinus Torvalds "write-back", 1771da177e4SLinus Torvalds "undefined 3", 1781da177e4SLinus Torvalds "undefined 4", 1791da177e4SLinus Torvalds "undefined 5", 1801da177e4SLinus Torvalds "write-back", 1811da177e4SLinus Torvalds "write-back", 1821da177e4SLinus Torvalds "undefined 8", 1831da177e4SLinus Torvalds "undefined 9", 1841da177e4SLinus Torvalds "undefined 10", 1851da177e4SLinus Torvalds "undefined 11", 1861da177e4SLinus Torvalds "undefined 12", 1871da177e4SLinus Torvalds "undefined 13", 1881da177e4SLinus Torvalds "write-back", 1891da177e4SLinus Torvalds "undefined 15", 1901da177e4SLinus Torvalds }; 1911da177e4SLinus Torvalds 1921da177e4SLinus Torvalds static const char *cache_clean[16] = { 1931da177e4SLinus Torvalds "not required", 1941da177e4SLinus Torvalds "read-block", 1951da177e4SLinus Torvalds "cp15 c7 ops", 1961da177e4SLinus Torvalds "undefined 3", 1971da177e4SLinus Torvalds "undefined 4", 1981da177e4SLinus Torvalds "undefined 5", 1991da177e4SLinus Torvalds "cp15 c7 ops", 2001da177e4SLinus Torvalds "cp15 c7 ops", 2011da177e4SLinus Torvalds "undefined 8", 2021da177e4SLinus Torvalds "undefined 9", 2031da177e4SLinus Torvalds "undefined 10", 2041da177e4SLinus Torvalds "undefined 11", 2051da177e4SLinus Torvalds "undefined 12", 2061da177e4SLinus Torvalds "undefined 13", 2071da177e4SLinus Torvalds "cp15 c7 ops", 2081da177e4SLinus Torvalds "undefined 15", 2091da177e4SLinus Torvalds }; 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds static const char *cache_lockdown[16] = { 2121da177e4SLinus Torvalds "not supported", 2131da177e4SLinus Torvalds "not supported", 2141da177e4SLinus Torvalds "not supported", 2151da177e4SLinus Torvalds "undefined 3", 2161da177e4SLinus Torvalds "undefined 4", 2171da177e4SLinus Torvalds "undefined 5", 2181da177e4SLinus Torvalds "format A", 2191da177e4SLinus Torvalds "format B", 2201da177e4SLinus Torvalds "undefined 8", 2211da177e4SLinus Torvalds "undefined 9", 2221da177e4SLinus Torvalds "undefined 10", 2231da177e4SLinus Torvalds "undefined 11", 2241da177e4SLinus Torvalds "undefined 12", 2251da177e4SLinus Torvalds "undefined 13", 2261da177e4SLinus Torvalds "format C", 2271da177e4SLinus Torvalds "undefined 15", 2281da177e4SLinus Torvalds }; 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds static const char *proc_arch[] = { 2311da177e4SLinus Torvalds "undefined/unknown", 2321da177e4SLinus Torvalds "3", 2331da177e4SLinus Torvalds "4", 2341da177e4SLinus Torvalds "4T", 2351da177e4SLinus Torvalds "5", 2361da177e4SLinus Torvalds "5T", 2371da177e4SLinus Torvalds "5TE", 2381da177e4SLinus Torvalds "5TEJ", 2391da177e4SLinus Torvalds "6TEJ", 2406b090a25SCatalin Marinas "7", 2411da177e4SLinus Torvalds "?(11)", 2421da177e4SLinus Torvalds "?(12)", 2431da177e4SLinus Torvalds "?(13)", 2441da177e4SLinus Torvalds "?(14)", 2451da177e4SLinus Torvalds "?(15)", 2461da177e4SLinus Torvalds "?(16)", 2471da177e4SLinus Torvalds "?(17)", 2481da177e4SLinus Torvalds }; 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds #define CACHE_TYPE(x) (((x) >> 25) & 15) 2511da177e4SLinus Torvalds #define CACHE_S(x) ((x) & (1 << 24)) 2521da177e4SLinus Torvalds #define CACHE_DSIZE(x) (((x) >> 12) & 4095) /* only if S=1 */ 2531da177e4SLinus Torvalds #define CACHE_ISIZE(x) ((x) & 4095) 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds #define CACHE_SIZE(y) (((y) >> 6) & 7) 2561da177e4SLinus Torvalds #define CACHE_ASSOC(y) (((y) >> 3) & 7) 2571da177e4SLinus Torvalds #define CACHE_M(y) ((y) & (1 << 2)) 2581da177e4SLinus Torvalds #define CACHE_LINE(y) ((y) & 3) 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds static inline void dump_cache(const char *prefix, int cpu, unsigned int cache) 2611da177e4SLinus Torvalds { 2621da177e4SLinus Torvalds unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0); 2631da177e4SLinus Torvalds 2641da177e4SLinus Torvalds printk("CPU%u: %s: %d bytes, associativity %d, %d byte lines, %d sets\n", 2651da177e4SLinus Torvalds cpu, prefix, 2661da177e4SLinus Torvalds mult << (8 + CACHE_SIZE(cache)), 2671da177e4SLinus Torvalds (mult << CACHE_ASSOC(cache)) >> 1, 2681da177e4SLinus Torvalds 8 << CACHE_LINE(cache), 2691da177e4SLinus Torvalds 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) - 2701da177e4SLinus Torvalds CACHE_LINE(cache))); 2711da177e4SLinus Torvalds } 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds static void __init dump_cpu_info(int cpu) 2741da177e4SLinus Torvalds { 2751da177e4SLinus Torvalds unsigned int info = read_cpuid(CPUID_CACHETYPE); 2761da177e4SLinus Torvalds 2771da177e4SLinus Torvalds if (info != processor_id) { 2781da177e4SLinus Torvalds printk("CPU%u: D %s %s cache\n", cpu, cache_is_vivt() ? "VIVT" : "VIPT", 2791da177e4SLinus Torvalds cache_types[CACHE_TYPE(info)]); 2801da177e4SLinus Torvalds if (CACHE_S(info)) { 2811da177e4SLinus Torvalds dump_cache("I cache", cpu, CACHE_ISIZE(info)); 2821da177e4SLinus Torvalds dump_cache("D cache", cpu, CACHE_DSIZE(info)); 2831da177e4SLinus Torvalds } else { 2841da177e4SLinus Torvalds dump_cache("cache", cpu, CACHE_ISIZE(info)); 2851da177e4SLinus Torvalds } 2861da177e4SLinus Torvalds } 28723759dc6SLennert Buytenhek 28823759dc6SLennert Buytenhek if (arch_is_coherent()) 28923759dc6SLennert Buytenhek printk("Cache coherency enabled\n"); 2901da177e4SLinus Torvalds } 2911da177e4SLinus Torvalds 2921da177e4SLinus Torvalds int cpu_architecture(void) 2931da177e4SLinus Torvalds { 2941da177e4SLinus Torvalds int cpu_arch; 2951da177e4SLinus Torvalds 2966b090a25SCatalin Marinas if ((processor_id & 0x0008f000) == 0) { 2971da177e4SLinus Torvalds cpu_arch = CPU_ARCH_UNKNOWN; 2986b090a25SCatalin Marinas } else if ((processor_id & 0x0008f000) == 0x00007000) { 2991da177e4SLinus Torvalds cpu_arch = (processor_id & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3; 3006b090a25SCatalin Marinas } else if ((processor_id & 0x00080000) == 0x00000000) { 3011da177e4SLinus Torvalds cpu_arch = (processor_id >> 16) & 7; 3021da177e4SLinus Torvalds if (cpu_arch) 3031da177e4SLinus Torvalds cpu_arch += CPU_ARCH_ARMv3; 3046b090a25SCatalin Marinas } else { 3056b090a25SCatalin Marinas /* the revised CPUID */ 3066b090a25SCatalin Marinas cpu_arch = ((processor_id >> 12) & 0xf) - 0xb + CPU_ARCH_ARMv6; 3071da177e4SLinus Torvalds } 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvalds return cpu_arch; 3101da177e4SLinus Torvalds } 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds /* 3131da177e4SLinus Torvalds * These functions re-use the assembly code in head.S, which 3141da177e4SLinus Torvalds * already provide the required functionality. 3151da177e4SLinus Torvalds */ 3160f44ba1dSRussell King extern struct proc_info_list *lookup_processor_type(unsigned int); 3171da177e4SLinus Torvalds extern struct machine_desc *lookup_machine_type(unsigned int); 3181da177e4SLinus Torvalds 3191da177e4SLinus Torvalds static void __init setup_processor(void) 3201da177e4SLinus Torvalds { 3211da177e4SLinus Torvalds struct proc_info_list *list; 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds /* 3241da177e4SLinus Torvalds * locate processor in the list of supported processor 3251da177e4SLinus Torvalds * types. The linker builds this table for us from the 3261da177e4SLinus Torvalds * entries in arch/arm/mm/proc-*.S 3271da177e4SLinus Torvalds */ 3280f44ba1dSRussell King list = lookup_processor_type(processor_id); 3291da177e4SLinus Torvalds if (!list) { 3301da177e4SLinus Torvalds printk("CPU configuration botched (ID %08x), unable " 3311da177e4SLinus Torvalds "to continue.\n", processor_id); 3321da177e4SLinus Torvalds while (1); 3331da177e4SLinus Torvalds } 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvalds cpu_name = list->cpu_name; 3361da177e4SLinus Torvalds 3371da177e4SLinus Torvalds #ifdef MULTI_CPU 3381da177e4SLinus Torvalds processor = *list->proc; 3391da177e4SLinus Torvalds #endif 3401da177e4SLinus Torvalds #ifdef MULTI_TLB 3411da177e4SLinus Torvalds cpu_tlb = *list->tlb; 3421da177e4SLinus Torvalds #endif 3431da177e4SLinus Torvalds #ifdef MULTI_USER 3441da177e4SLinus Torvalds cpu_user = *list->user; 3451da177e4SLinus Torvalds #endif 3461da177e4SLinus Torvalds #ifdef MULTI_CACHE 3471da177e4SLinus Torvalds cpu_cache = *list->cache; 3481da177e4SLinus Torvalds #endif 3491da177e4SLinus Torvalds 3504e19025bSRussell King printk("CPU: %s [%08x] revision %d (ARMv%s), cr=%08lx\n", 3511da177e4SLinus Torvalds cpu_name, processor_id, (int)processor_id & 15, 352264edb35SRussell King proc_arch[cpu_architecture()], cr_alignment); 3531da177e4SLinus Torvalds 35496b644bdSSerge E. Hallyn sprintf(init_utsname()->machine, "%s%c", list->arch_name, ENDIANNESS); 3551da177e4SLinus Torvalds sprintf(elf_platform, "%s%c", list->elf_name, ENDIANNESS); 3561da177e4SLinus Torvalds elf_hwcap = list->elf_hwcap; 357adeff422SCatalin Marinas #ifndef CONFIG_ARM_THUMB 358adeff422SCatalin Marinas elf_hwcap &= ~HWCAP_THUMB; 359adeff422SCatalin Marinas #endif 3601da177e4SLinus Torvalds 3611da177e4SLinus Torvalds cpu_proc_init(); 3621da177e4SLinus Torvalds } 3631da177e4SLinus Torvalds 364ccea7a19SRussell King /* 365ccea7a19SRussell King * cpu_init - initialise one CPU. 366ccea7a19SRussell King * 367ccea7a19SRussell King * cpu_init dumps the cache information, initialises SMP specific 368ccea7a19SRussell King * information, and sets up the per-CPU stacks. 369ccea7a19SRussell King */ 37036c5ed23SRussell King void cpu_init(void) 371ccea7a19SRussell King { 372ccea7a19SRussell King unsigned int cpu = smp_processor_id(); 373ccea7a19SRussell King struct stack *stk = &stacks[cpu]; 374ccea7a19SRussell King 375ccea7a19SRussell King if (cpu >= NR_CPUS) { 376ccea7a19SRussell King printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu); 377ccea7a19SRussell King BUG(); 378ccea7a19SRussell King } 379ccea7a19SRussell King 38032f8b97cSRussell King if (system_state == SYSTEM_BOOTING) 381ccea7a19SRussell King dump_cpu_info(cpu); 382ccea7a19SRussell King 383ccea7a19SRussell King /* 384ccea7a19SRussell King * setup stacks for re-entrant exception handlers 385ccea7a19SRussell King */ 386ccea7a19SRussell King __asm__ ( 387ccea7a19SRussell King "msr cpsr_c, %1\n\t" 388ccea7a19SRussell King "add sp, %0, %2\n\t" 389ccea7a19SRussell King "msr cpsr_c, %3\n\t" 390ccea7a19SRussell King "add sp, %0, %4\n\t" 391ccea7a19SRussell King "msr cpsr_c, %5\n\t" 392ccea7a19SRussell King "add sp, %0, %6\n\t" 393ccea7a19SRussell King "msr cpsr_c, %7" 394ccea7a19SRussell King : 395ccea7a19SRussell King : "r" (stk), 396ccea7a19SRussell King "I" (PSR_F_BIT | PSR_I_BIT | IRQ_MODE), 397ccea7a19SRussell King "I" (offsetof(struct stack, irq[0])), 398ccea7a19SRussell King "I" (PSR_F_BIT | PSR_I_BIT | ABT_MODE), 399ccea7a19SRussell King "I" (offsetof(struct stack, abt[0])), 400ccea7a19SRussell King "I" (PSR_F_BIT | PSR_I_BIT | UND_MODE), 401ccea7a19SRussell King "I" (offsetof(struct stack, und[0])), 402aaaa3f9eSCatalin Marinas "I" (PSR_F_BIT | PSR_I_BIT | SVC_MODE) 403aaaa3f9eSCatalin Marinas : "r14"); 404ccea7a19SRussell King } 405ccea7a19SRussell King 4061da177e4SLinus Torvalds static struct machine_desc * __init setup_machine(unsigned int nr) 4071da177e4SLinus Torvalds { 4081da177e4SLinus Torvalds struct machine_desc *list; 4091da177e4SLinus Torvalds 4101da177e4SLinus Torvalds /* 4111da177e4SLinus Torvalds * locate machine in the list of supported machines. 4121da177e4SLinus Torvalds */ 4131da177e4SLinus Torvalds list = lookup_machine_type(nr); 4141da177e4SLinus Torvalds if (!list) { 4151da177e4SLinus Torvalds printk("Machine configuration botched (nr %d), unable " 4161da177e4SLinus Torvalds "to continue.\n", nr); 4171da177e4SLinus Torvalds while (1); 4181da177e4SLinus Torvalds } 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds printk("Machine: %s\n", list->name); 4211da177e4SLinus Torvalds 4221da177e4SLinus Torvalds return list; 4231da177e4SLinus Torvalds } 4241da177e4SLinus Torvalds 4251da177e4SLinus Torvalds static void __init early_initrd(char **p) 4261da177e4SLinus Torvalds { 4271da177e4SLinus Torvalds unsigned long start, size; 4281da177e4SLinus Torvalds 4291da177e4SLinus Torvalds start = memparse(*p, p); 4301da177e4SLinus Torvalds if (**p == ',') { 4311da177e4SLinus Torvalds size = memparse((*p) + 1, p); 4321da177e4SLinus Torvalds 4331da177e4SLinus Torvalds phys_initrd_start = start; 4341da177e4SLinus Torvalds phys_initrd_size = size; 4351da177e4SLinus Torvalds } 4361da177e4SLinus Torvalds } 4371da177e4SLinus Torvalds __early_param("initrd=", early_initrd); 4381da177e4SLinus Torvalds 4391c97b73eSAndrew Morton static void __init arm_add_memory(unsigned long start, unsigned long size) 4403a669411SRussell King { 44105f96ef1SRussell King struct membank *bank; 44205f96ef1SRussell King 4433a669411SRussell King /* 4443a669411SRussell King * Ensure that start/size are aligned to a page boundary. 4453a669411SRussell King * Size is appropriately rounded down, start is rounded up. 4463a669411SRussell King */ 4473a669411SRussell King size -= start & ~PAGE_MASK; 4483a669411SRussell King 44905f96ef1SRussell King bank = &meminfo.bank[meminfo.nr_banks++]; 45005f96ef1SRussell King 45105f96ef1SRussell King bank->start = PAGE_ALIGN(start); 45205f96ef1SRussell King bank->size = size & PAGE_MASK; 45305f96ef1SRussell King bank->node = PHYS_TO_NID(start); 4543a669411SRussell King } 4553a669411SRussell King 4561da177e4SLinus Torvalds /* 4571da177e4SLinus Torvalds * Pick out the memory size. We look for mem=size@start, 4581da177e4SLinus Torvalds * where start and size are "size[KkMm]" 4591da177e4SLinus Torvalds */ 4601da177e4SLinus Torvalds static void __init early_mem(char **p) 4611da177e4SLinus Torvalds { 4621da177e4SLinus Torvalds static int usermem __initdata = 0; 4631da177e4SLinus Torvalds unsigned long size, start; 4641da177e4SLinus Torvalds 4651da177e4SLinus Torvalds /* 4661da177e4SLinus Torvalds * If the user specifies memory size, we 4671da177e4SLinus Torvalds * blow away any automatically generated 4681da177e4SLinus Torvalds * size. 4691da177e4SLinus Torvalds */ 4701da177e4SLinus Torvalds if (usermem == 0) { 4711da177e4SLinus Torvalds usermem = 1; 4721da177e4SLinus Torvalds meminfo.nr_banks = 0; 4731da177e4SLinus Torvalds } 4741da177e4SLinus Torvalds 4751da177e4SLinus Torvalds start = PHYS_OFFSET; 4761da177e4SLinus Torvalds size = memparse(*p, p); 4771da177e4SLinus Torvalds if (**p == '@') 4781da177e4SLinus Torvalds start = memparse(*p + 1, p); 4791da177e4SLinus Torvalds 4801c97b73eSAndrew Morton arm_add_memory(start, size); 4811da177e4SLinus Torvalds } 4821da177e4SLinus Torvalds __early_param("mem=", early_mem); 4831da177e4SLinus Torvalds 4841da177e4SLinus Torvalds /* 4851da177e4SLinus Torvalds * Initial parsing of the command line. 4861da177e4SLinus Torvalds */ 4871da177e4SLinus Torvalds static void __init parse_cmdline(char **cmdline_p, char *from) 4881da177e4SLinus Torvalds { 4891da177e4SLinus Torvalds char c = ' ', *to = command_line; 4901da177e4SLinus Torvalds int len = 0; 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds for (;;) { 4931da177e4SLinus Torvalds if (c == ' ') { 4941da177e4SLinus Torvalds extern struct early_params __early_begin, __early_end; 4951da177e4SLinus Torvalds struct early_params *p; 4961da177e4SLinus Torvalds 4971da177e4SLinus Torvalds for (p = &__early_begin; p < &__early_end; p++) { 4981da177e4SLinus Torvalds int len = strlen(p->arg); 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds if (memcmp(from, p->arg, len) == 0) { 5011da177e4SLinus Torvalds if (to != command_line) 5021da177e4SLinus Torvalds to -= 1; 5031da177e4SLinus Torvalds from += len; 5041da177e4SLinus Torvalds p->fn(&from); 5051da177e4SLinus Torvalds 5061da177e4SLinus Torvalds while (*from != ' ' && *from != '\0') 5071da177e4SLinus Torvalds from++; 5081da177e4SLinus Torvalds break; 5091da177e4SLinus Torvalds } 5101da177e4SLinus Torvalds } 5111da177e4SLinus Torvalds } 5121da177e4SLinus Torvalds c = *from++; 5131da177e4SLinus Torvalds if (!c) 5141da177e4SLinus Torvalds break; 5151da177e4SLinus Torvalds if (COMMAND_LINE_SIZE <= ++len) 5161da177e4SLinus Torvalds break; 5171da177e4SLinus Torvalds *to++ = c; 5181da177e4SLinus Torvalds } 5191da177e4SLinus Torvalds *to = '\0'; 5201da177e4SLinus Torvalds *cmdline_p = command_line; 5211da177e4SLinus Torvalds } 5221da177e4SLinus Torvalds 5231da177e4SLinus Torvalds static void __init 5241da177e4SLinus Torvalds setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz) 5251da177e4SLinus Torvalds { 5261da177e4SLinus Torvalds #ifdef CONFIG_BLK_DEV_RAM 5271da177e4SLinus Torvalds extern int rd_size, rd_image_start, rd_prompt, rd_doload; 5281da177e4SLinus Torvalds 5291da177e4SLinus Torvalds rd_image_start = image_start; 5301da177e4SLinus Torvalds rd_prompt = prompt; 5311da177e4SLinus Torvalds rd_doload = doload; 5321da177e4SLinus Torvalds 5331da177e4SLinus Torvalds if (rd_sz) 5341da177e4SLinus Torvalds rd_size = rd_sz; 5351da177e4SLinus Torvalds #endif 5361da177e4SLinus Torvalds } 5371da177e4SLinus Torvalds 5381da177e4SLinus Torvalds static void __init 5391da177e4SLinus Torvalds request_standard_resources(struct meminfo *mi, struct machine_desc *mdesc) 5401da177e4SLinus Torvalds { 5411da177e4SLinus Torvalds struct resource *res; 5421da177e4SLinus Torvalds int i; 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds kernel_code.start = virt_to_phys(&_text); 5451da177e4SLinus Torvalds kernel_code.end = virt_to_phys(&_etext - 1); 5461da177e4SLinus Torvalds kernel_data.start = virt_to_phys(&__data_start); 5471da177e4SLinus Torvalds kernel_data.end = virt_to_phys(&_end - 1); 5481da177e4SLinus Torvalds 5491da177e4SLinus Torvalds for (i = 0; i < mi->nr_banks; i++) { 5501da177e4SLinus Torvalds unsigned long virt_start, virt_end; 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds if (mi->bank[i].size == 0) 5531da177e4SLinus Torvalds continue; 5541da177e4SLinus Torvalds 5551da177e4SLinus Torvalds virt_start = __phys_to_virt(mi->bank[i].start); 5561da177e4SLinus Torvalds virt_end = virt_start + mi->bank[i].size - 1; 5571da177e4SLinus Torvalds 5581da177e4SLinus Torvalds res = alloc_bootmem_low(sizeof(*res)); 5591da177e4SLinus Torvalds res->name = "System RAM"; 5601da177e4SLinus Torvalds res->start = __virt_to_phys(virt_start); 5611da177e4SLinus Torvalds res->end = __virt_to_phys(virt_end); 5621da177e4SLinus Torvalds res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; 5631da177e4SLinus Torvalds 5641da177e4SLinus Torvalds request_resource(&iomem_resource, res); 5651da177e4SLinus Torvalds 5661da177e4SLinus Torvalds if (kernel_code.start >= res->start && 5671da177e4SLinus Torvalds kernel_code.end <= res->end) 5681da177e4SLinus Torvalds request_resource(res, &kernel_code); 5691da177e4SLinus Torvalds if (kernel_data.start >= res->start && 5701da177e4SLinus Torvalds kernel_data.end <= res->end) 5711da177e4SLinus Torvalds request_resource(res, &kernel_data); 5721da177e4SLinus Torvalds } 5731da177e4SLinus Torvalds 5741da177e4SLinus Torvalds if (mdesc->video_start) { 5751da177e4SLinus Torvalds video_ram.start = mdesc->video_start; 5761da177e4SLinus Torvalds video_ram.end = mdesc->video_end; 5771da177e4SLinus Torvalds request_resource(&iomem_resource, &video_ram); 5781da177e4SLinus Torvalds } 5791da177e4SLinus Torvalds 5801da177e4SLinus Torvalds /* 5811da177e4SLinus Torvalds * Some machines don't have the possibility of ever 5821da177e4SLinus Torvalds * possessing lp0, lp1 or lp2 5831da177e4SLinus Torvalds */ 5841da177e4SLinus Torvalds if (mdesc->reserve_lp0) 5851da177e4SLinus Torvalds request_resource(&ioport_resource, &lp0); 5861da177e4SLinus Torvalds if (mdesc->reserve_lp1) 5871da177e4SLinus Torvalds request_resource(&ioport_resource, &lp1); 5881da177e4SLinus Torvalds if (mdesc->reserve_lp2) 5891da177e4SLinus Torvalds request_resource(&ioport_resource, &lp2); 5901da177e4SLinus Torvalds } 5911da177e4SLinus Torvalds 5921da177e4SLinus Torvalds /* 5931da177e4SLinus Torvalds * Tag parsing. 5941da177e4SLinus Torvalds * 5951da177e4SLinus Torvalds * This is the new way of passing data to the kernel at boot time. Rather 5961da177e4SLinus Torvalds * than passing a fixed inflexible structure to the kernel, we pass a list 5971da177e4SLinus Torvalds * of variable-sized tags to the kernel. The first tag must be a ATAG_CORE 5981da177e4SLinus Torvalds * tag for the list to be recognised (to distinguish the tagged list from 5991da177e4SLinus Torvalds * a param_struct). The list is terminated with a zero-length tag (this tag 6001da177e4SLinus Torvalds * is not parsed in any way). 6011da177e4SLinus Torvalds */ 6021da177e4SLinus Torvalds static int __init parse_tag_core(const struct tag *tag) 6031da177e4SLinus Torvalds { 6041da177e4SLinus Torvalds if (tag->hdr.size > 2) { 6051da177e4SLinus Torvalds if ((tag->u.core.flags & 1) == 0) 6061da177e4SLinus Torvalds root_mountflags &= ~MS_RDONLY; 6071da177e4SLinus Torvalds ROOT_DEV = old_decode_dev(tag->u.core.rootdev); 6081da177e4SLinus Torvalds } 6091da177e4SLinus Torvalds return 0; 6101da177e4SLinus Torvalds } 6111da177e4SLinus Torvalds 6121da177e4SLinus Torvalds __tagtable(ATAG_CORE, parse_tag_core); 6131da177e4SLinus Torvalds 6141da177e4SLinus Torvalds static int __init parse_tag_mem32(const struct tag *tag) 6151da177e4SLinus Torvalds { 6161da177e4SLinus Torvalds if (meminfo.nr_banks >= NR_BANKS) { 6171da177e4SLinus Torvalds printk(KERN_WARNING 6181da177e4SLinus Torvalds "Ignoring memory bank 0x%08x size %dKB\n", 6191da177e4SLinus Torvalds tag->u.mem.start, tag->u.mem.size / 1024); 6201da177e4SLinus Torvalds return -EINVAL; 6211da177e4SLinus Torvalds } 6221c97b73eSAndrew Morton arm_add_memory(tag->u.mem.start, tag->u.mem.size); 6231da177e4SLinus Torvalds return 0; 6241da177e4SLinus Torvalds } 6251da177e4SLinus Torvalds 6261da177e4SLinus Torvalds __tagtable(ATAG_MEM, parse_tag_mem32); 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE) 6291da177e4SLinus Torvalds struct screen_info screen_info = { 6301da177e4SLinus Torvalds .orig_video_lines = 30, 6311da177e4SLinus Torvalds .orig_video_cols = 80, 6321da177e4SLinus Torvalds .orig_video_mode = 0, 6331da177e4SLinus Torvalds .orig_video_ega_bx = 0, 6341da177e4SLinus Torvalds .orig_video_isVGA = 1, 6351da177e4SLinus Torvalds .orig_video_points = 8 6361da177e4SLinus Torvalds }; 6371da177e4SLinus Torvalds 6381da177e4SLinus Torvalds static int __init parse_tag_videotext(const struct tag *tag) 6391da177e4SLinus Torvalds { 6401da177e4SLinus Torvalds screen_info.orig_x = tag->u.videotext.x; 6411da177e4SLinus Torvalds screen_info.orig_y = tag->u.videotext.y; 6421da177e4SLinus Torvalds screen_info.orig_video_page = tag->u.videotext.video_page; 6431da177e4SLinus Torvalds screen_info.orig_video_mode = tag->u.videotext.video_mode; 6441da177e4SLinus Torvalds screen_info.orig_video_cols = tag->u.videotext.video_cols; 6451da177e4SLinus Torvalds screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx; 6461da177e4SLinus Torvalds screen_info.orig_video_lines = tag->u.videotext.video_lines; 6471da177e4SLinus Torvalds screen_info.orig_video_isVGA = tag->u.videotext.video_isvga; 6481da177e4SLinus Torvalds screen_info.orig_video_points = tag->u.videotext.video_points; 6491da177e4SLinus Torvalds return 0; 6501da177e4SLinus Torvalds } 6511da177e4SLinus Torvalds 6521da177e4SLinus Torvalds __tagtable(ATAG_VIDEOTEXT, parse_tag_videotext); 6531da177e4SLinus Torvalds #endif 6541da177e4SLinus Torvalds 6551da177e4SLinus Torvalds static int __init parse_tag_ramdisk(const struct tag *tag) 6561da177e4SLinus Torvalds { 6571da177e4SLinus Torvalds setup_ramdisk((tag->u.ramdisk.flags & 1) == 0, 6581da177e4SLinus Torvalds (tag->u.ramdisk.flags & 2) == 0, 6591da177e4SLinus Torvalds tag->u.ramdisk.start, tag->u.ramdisk.size); 6601da177e4SLinus Torvalds return 0; 6611da177e4SLinus Torvalds } 6621da177e4SLinus Torvalds 6631da177e4SLinus Torvalds __tagtable(ATAG_RAMDISK, parse_tag_ramdisk); 6641da177e4SLinus Torvalds 6651da177e4SLinus Torvalds static int __init parse_tag_initrd(const struct tag *tag) 6661da177e4SLinus Torvalds { 6671da177e4SLinus Torvalds printk(KERN_WARNING "ATAG_INITRD is deprecated; " 6681da177e4SLinus Torvalds "please update your bootloader.\n"); 6691da177e4SLinus Torvalds phys_initrd_start = __virt_to_phys(tag->u.initrd.start); 6701da177e4SLinus Torvalds phys_initrd_size = tag->u.initrd.size; 6711da177e4SLinus Torvalds return 0; 6721da177e4SLinus Torvalds } 6731da177e4SLinus Torvalds 6741da177e4SLinus Torvalds __tagtable(ATAG_INITRD, parse_tag_initrd); 6751da177e4SLinus Torvalds 6761da177e4SLinus Torvalds static int __init parse_tag_initrd2(const struct tag *tag) 6771da177e4SLinus Torvalds { 6781da177e4SLinus Torvalds phys_initrd_start = tag->u.initrd.start; 6791da177e4SLinus Torvalds phys_initrd_size = tag->u.initrd.size; 6801da177e4SLinus Torvalds return 0; 6811da177e4SLinus Torvalds } 6821da177e4SLinus Torvalds 6831da177e4SLinus Torvalds __tagtable(ATAG_INITRD2, parse_tag_initrd2); 6841da177e4SLinus Torvalds 6851da177e4SLinus Torvalds static int __init parse_tag_serialnr(const struct tag *tag) 6861da177e4SLinus Torvalds { 6871da177e4SLinus Torvalds system_serial_low = tag->u.serialnr.low; 6881da177e4SLinus Torvalds system_serial_high = tag->u.serialnr.high; 6891da177e4SLinus Torvalds return 0; 6901da177e4SLinus Torvalds } 6911da177e4SLinus Torvalds 6921da177e4SLinus Torvalds __tagtable(ATAG_SERIAL, parse_tag_serialnr); 6931da177e4SLinus Torvalds 6941da177e4SLinus Torvalds static int __init parse_tag_revision(const struct tag *tag) 6951da177e4SLinus Torvalds { 6961da177e4SLinus Torvalds system_rev = tag->u.revision.rev; 6971da177e4SLinus Torvalds return 0; 6981da177e4SLinus Torvalds } 6991da177e4SLinus Torvalds 7001da177e4SLinus Torvalds __tagtable(ATAG_REVISION, parse_tag_revision); 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds static int __init parse_tag_cmdline(const struct tag *tag) 7031da177e4SLinus Torvalds { 7041da177e4SLinus Torvalds strlcpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE); 7051da177e4SLinus Torvalds return 0; 7061da177e4SLinus Torvalds } 7071da177e4SLinus Torvalds 7081da177e4SLinus Torvalds __tagtable(ATAG_CMDLINE, parse_tag_cmdline); 7091da177e4SLinus Torvalds 7101da177e4SLinus Torvalds /* 7111da177e4SLinus Torvalds * Scan the tag table for this tag, and call its parse function. 7121da177e4SLinus Torvalds * The tag table is built by the linker from all the __tagtable 7131da177e4SLinus Torvalds * declarations. 7141da177e4SLinus Torvalds */ 7151da177e4SLinus Torvalds static int __init parse_tag(const struct tag *tag) 7161da177e4SLinus Torvalds { 7171da177e4SLinus Torvalds extern struct tagtable __tagtable_begin, __tagtable_end; 7181da177e4SLinus Torvalds struct tagtable *t; 7191da177e4SLinus Torvalds 7201da177e4SLinus Torvalds for (t = &__tagtable_begin; t < &__tagtable_end; t++) 7211da177e4SLinus Torvalds if (tag->hdr.tag == t->tag) { 7221da177e4SLinus Torvalds t->parse(tag); 7231da177e4SLinus Torvalds break; 7241da177e4SLinus Torvalds } 7251da177e4SLinus Torvalds 7261da177e4SLinus Torvalds return t < &__tagtable_end; 7271da177e4SLinus Torvalds } 7281da177e4SLinus Torvalds 7291da177e4SLinus Torvalds /* 7301da177e4SLinus Torvalds * Parse all tags in the list, checking both the global and architecture 7311da177e4SLinus Torvalds * specific tag tables. 7321da177e4SLinus Torvalds */ 7331da177e4SLinus Torvalds static void __init parse_tags(const struct tag *t) 7341da177e4SLinus Torvalds { 7351da177e4SLinus Torvalds for (; t->hdr.size; t = tag_next(t)) 7361da177e4SLinus Torvalds if (!parse_tag(t)) 7371da177e4SLinus Torvalds printk(KERN_WARNING 7381da177e4SLinus Torvalds "Ignoring unrecognised tag 0x%08x\n", 7391da177e4SLinus Torvalds t->hdr.tag); 7401da177e4SLinus Torvalds } 7411da177e4SLinus Torvalds 7421da177e4SLinus Torvalds /* 7431da177e4SLinus Torvalds * This holds our defaults. 7441da177e4SLinus Torvalds */ 7451da177e4SLinus Torvalds static struct init_tags { 7461da177e4SLinus Torvalds struct tag_header hdr1; 7471da177e4SLinus Torvalds struct tag_core core; 7481da177e4SLinus Torvalds struct tag_header hdr2; 7491da177e4SLinus Torvalds struct tag_mem32 mem; 7501da177e4SLinus Torvalds struct tag_header hdr3; 7511da177e4SLinus Torvalds } init_tags __initdata = { 7521da177e4SLinus Torvalds { tag_size(tag_core), ATAG_CORE }, 7531da177e4SLinus Torvalds { 1, PAGE_SIZE, 0xff }, 7541da177e4SLinus Torvalds { tag_size(tag_mem32), ATAG_MEM }, 7551da177e4SLinus Torvalds { MEM_SIZE, PHYS_OFFSET }, 7561da177e4SLinus Torvalds { 0, ATAG_NONE } 7571da177e4SLinus Torvalds }; 7581da177e4SLinus Torvalds 7591da177e4SLinus Torvalds static void (*init_machine)(void) __initdata; 7601da177e4SLinus Torvalds 7611da177e4SLinus Torvalds static int __init customize_machine(void) 7621da177e4SLinus Torvalds { 7631da177e4SLinus Torvalds /* customizes platform devices, or adds new ones */ 7641da177e4SLinus Torvalds if (init_machine) 7651da177e4SLinus Torvalds init_machine(); 7661da177e4SLinus Torvalds return 0; 7671da177e4SLinus Torvalds } 7681da177e4SLinus Torvalds arch_initcall(customize_machine); 7691da177e4SLinus Torvalds 7701da177e4SLinus Torvalds void __init setup_arch(char **cmdline_p) 7711da177e4SLinus Torvalds { 7721da177e4SLinus Torvalds struct tag *tags = (struct tag *)&init_tags; 7731da177e4SLinus Torvalds struct machine_desc *mdesc; 7741da177e4SLinus Torvalds char *from = default_command_line; 7751da177e4SLinus Torvalds 7761da177e4SLinus Torvalds setup_processor(); 7771da177e4SLinus Torvalds mdesc = setup_machine(machine_arch_type); 7781da177e4SLinus Torvalds machine_name = mdesc->name; 7791da177e4SLinus Torvalds 7801da177e4SLinus Torvalds if (mdesc->soft_reboot) 7811da177e4SLinus Torvalds reboot_setup("s"); 7821da177e4SLinus Torvalds 783f9bd6ea4SRussell King if (mdesc->boot_params) 784f9bd6ea4SRussell King tags = phys_to_virt(mdesc->boot_params); 7851da177e4SLinus Torvalds 7861da177e4SLinus Torvalds /* 7871da177e4SLinus Torvalds * If we have the old style parameters, convert them to 7881da177e4SLinus Torvalds * a tag list. 7891da177e4SLinus Torvalds */ 7901da177e4SLinus Torvalds if (tags->hdr.tag != ATAG_CORE) 7911da177e4SLinus Torvalds convert_to_tag_list(tags); 7921da177e4SLinus Torvalds if (tags->hdr.tag != ATAG_CORE) 7931da177e4SLinus Torvalds tags = (struct tag *)&init_tags; 7941da177e4SLinus Torvalds 7951da177e4SLinus Torvalds if (mdesc->fixup) 7961da177e4SLinus Torvalds mdesc->fixup(mdesc, tags, &from, &meminfo); 7971da177e4SLinus Torvalds 7981da177e4SLinus Torvalds if (tags->hdr.tag == ATAG_CORE) { 7991da177e4SLinus Torvalds if (meminfo.nr_banks != 0) 8001da177e4SLinus Torvalds squash_mem_tags(tags); 8011da177e4SLinus Torvalds parse_tags(tags); 8021da177e4SLinus Torvalds } 8031da177e4SLinus Torvalds 8041da177e4SLinus Torvalds init_mm.start_code = (unsigned long) &_text; 8051da177e4SLinus Torvalds init_mm.end_code = (unsigned long) &_etext; 8061da177e4SLinus Torvalds init_mm.end_data = (unsigned long) &_edata; 8071da177e4SLinus Torvalds init_mm.brk = (unsigned long) &_end; 8081da177e4SLinus Torvalds 809cd81899aSAlon Bar-Lev memcpy(boot_command_line, from, COMMAND_LINE_SIZE); 810cd81899aSAlon Bar-Lev boot_command_line[COMMAND_LINE_SIZE-1] = '\0'; 8111da177e4SLinus Torvalds parse_cmdline(cmdline_p, from); 8121da177e4SLinus Torvalds paging_init(&meminfo, mdesc); 8131da177e4SLinus Torvalds request_standard_resources(&meminfo, mdesc); 8141da177e4SLinus Torvalds 8157bbb7940SRussell King #ifdef CONFIG_SMP 8167bbb7940SRussell King smp_init_cpus(); 8177bbb7940SRussell King #endif 8187bbb7940SRussell King 819ccea7a19SRussell King cpu_init(); 820ccea7a19SRussell King 8211da177e4SLinus Torvalds /* 8221da177e4SLinus Torvalds * Set up various architecture-specific pointers 8231da177e4SLinus Torvalds */ 8241da177e4SLinus Torvalds init_arch_irq = mdesc->init_irq; 8251da177e4SLinus Torvalds system_timer = mdesc->timer; 8261da177e4SLinus Torvalds init_machine = mdesc->init_machine; 8271da177e4SLinus Torvalds 8281da177e4SLinus Torvalds #ifdef CONFIG_VT 8291da177e4SLinus Torvalds #if defined(CONFIG_VGA_CONSOLE) 8301da177e4SLinus Torvalds conswitchp = &vga_con; 8311da177e4SLinus Torvalds #elif defined(CONFIG_DUMMY_CONSOLE) 8321da177e4SLinus Torvalds conswitchp = &dummy_con; 8331da177e4SLinus Torvalds #endif 8341da177e4SLinus Torvalds #endif 8351da177e4SLinus Torvalds } 8361da177e4SLinus Torvalds 8371da177e4SLinus Torvalds 8381da177e4SLinus Torvalds static int __init topology_init(void) 8391da177e4SLinus Torvalds { 8401da177e4SLinus Torvalds int cpu; 8411da177e4SLinus Torvalds 84266fb8bd2SRussell King for_each_possible_cpu(cpu) { 84366fb8bd2SRussell King struct cpuinfo_arm *cpuinfo = &per_cpu(cpu_data, cpu); 84466fb8bd2SRussell King cpuinfo->cpu.hotpluggable = 1; 84566fb8bd2SRussell King register_cpu(&cpuinfo->cpu, cpu); 84666fb8bd2SRussell King } 8471da177e4SLinus Torvalds 8481da177e4SLinus Torvalds return 0; 8491da177e4SLinus Torvalds } 8501da177e4SLinus Torvalds 8511da177e4SLinus Torvalds subsys_initcall(topology_init); 8521da177e4SLinus Torvalds 8531da177e4SLinus Torvalds static const char *hwcap_str[] = { 8541da177e4SLinus Torvalds "swp", 8551da177e4SLinus Torvalds "half", 8561da177e4SLinus Torvalds "thumb", 8571da177e4SLinus Torvalds "26bit", 8581da177e4SLinus Torvalds "fastmult", 8591da177e4SLinus Torvalds "fpa", 8601da177e4SLinus Torvalds "vfp", 8611da177e4SLinus Torvalds "edsp", 8621da177e4SLinus Torvalds "java", 8638f7f9435SPaul Gortmaker "iwmmxt", 86499e4a6ddSLennert Buytenhek "crunch", 8651da177e4SLinus Torvalds NULL 8661da177e4SLinus Torvalds }; 8671da177e4SLinus Torvalds 8681da177e4SLinus Torvalds static void 8691da177e4SLinus Torvalds c_show_cache(struct seq_file *m, const char *type, unsigned int cache) 8701da177e4SLinus Torvalds { 8711da177e4SLinus Torvalds unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0); 8721da177e4SLinus Torvalds 8731da177e4SLinus Torvalds seq_printf(m, "%s size\t\t: %d\n" 8741da177e4SLinus Torvalds "%s assoc\t\t: %d\n" 8751da177e4SLinus Torvalds "%s line length\t: %d\n" 8761da177e4SLinus Torvalds "%s sets\t\t: %d\n", 8771da177e4SLinus Torvalds type, mult << (8 + CACHE_SIZE(cache)), 8781da177e4SLinus Torvalds type, (mult << CACHE_ASSOC(cache)) >> 1, 8791da177e4SLinus Torvalds type, 8 << CACHE_LINE(cache), 8801da177e4SLinus Torvalds type, 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) - 8811da177e4SLinus Torvalds CACHE_LINE(cache))); 8821da177e4SLinus Torvalds } 8831da177e4SLinus Torvalds 8841da177e4SLinus Torvalds static int c_show(struct seq_file *m, void *v) 8851da177e4SLinus Torvalds { 8861da177e4SLinus Torvalds int i; 8871da177e4SLinus Torvalds 8881da177e4SLinus Torvalds seq_printf(m, "Processor\t: %s rev %d (%s)\n", 8891da177e4SLinus Torvalds cpu_name, (int)processor_id & 15, elf_platform); 8901da177e4SLinus Torvalds 8911da177e4SLinus Torvalds #if defined(CONFIG_SMP) 8921da177e4SLinus Torvalds for_each_online_cpu(i) { 89315559722SRussell King /* 89415559722SRussell King * glibc reads /proc/cpuinfo to determine the number of 89515559722SRussell King * online processors, looking for lines beginning with 89615559722SRussell King * "processor". Give glibc what it expects. 89715559722SRussell King */ 89815559722SRussell King seq_printf(m, "processor\t: %d\n", i); 8991da177e4SLinus Torvalds seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n", 9001da177e4SLinus Torvalds per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ), 9011da177e4SLinus Torvalds (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100); 9021da177e4SLinus Torvalds } 9031da177e4SLinus Torvalds #else /* CONFIG_SMP */ 9041da177e4SLinus Torvalds seq_printf(m, "BogoMIPS\t: %lu.%02lu\n", 9051da177e4SLinus Torvalds loops_per_jiffy / (500000/HZ), 9061da177e4SLinus Torvalds (loops_per_jiffy / (5000/HZ)) % 100); 9071da177e4SLinus Torvalds #endif 9081da177e4SLinus Torvalds 9091da177e4SLinus Torvalds /* dump out the processor features */ 9101da177e4SLinus Torvalds seq_puts(m, "Features\t: "); 9111da177e4SLinus Torvalds 9121da177e4SLinus Torvalds for (i = 0; hwcap_str[i]; i++) 9131da177e4SLinus Torvalds if (elf_hwcap & (1 << i)) 9141da177e4SLinus Torvalds seq_printf(m, "%s ", hwcap_str[i]); 9151da177e4SLinus Torvalds 9161da177e4SLinus Torvalds seq_printf(m, "\nCPU implementer\t: 0x%02x\n", processor_id >> 24); 9171da177e4SLinus Torvalds seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]); 9181da177e4SLinus Torvalds 9196b090a25SCatalin Marinas if ((processor_id & 0x0008f000) == 0x00000000) { 9201da177e4SLinus Torvalds /* pre-ARM7 */ 9211da177e4SLinus Torvalds seq_printf(m, "CPU part\t\t: %07x\n", processor_id >> 4); 9221da177e4SLinus Torvalds } else { 9236b090a25SCatalin Marinas if ((processor_id & 0x0008f000) == 0x00007000) { 9241da177e4SLinus Torvalds /* ARM7 */ 9251da177e4SLinus Torvalds seq_printf(m, "CPU variant\t: 0x%02x\n", 9261da177e4SLinus Torvalds (processor_id >> 16) & 127); 9271da177e4SLinus Torvalds } else { 9281da177e4SLinus Torvalds /* post-ARM7 */ 9291da177e4SLinus Torvalds seq_printf(m, "CPU variant\t: 0x%x\n", 9301da177e4SLinus Torvalds (processor_id >> 20) & 15); 9311da177e4SLinus Torvalds } 9321da177e4SLinus Torvalds seq_printf(m, "CPU part\t: 0x%03x\n", 9331da177e4SLinus Torvalds (processor_id >> 4) & 0xfff); 9341da177e4SLinus Torvalds } 9351da177e4SLinus Torvalds seq_printf(m, "CPU revision\t: %d\n", processor_id & 15); 9361da177e4SLinus Torvalds 9371da177e4SLinus Torvalds { 9381da177e4SLinus Torvalds unsigned int cache_info = read_cpuid(CPUID_CACHETYPE); 9391da177e4SLinus Torvalds if (cache_info != processor_id) { 9401da177e4SLinus Torvalds seq_printf(m, "Cache type\t: %s\n" 9411da177e4SLinus Torvalds "Cache clean\t: %s\n" 9421da177e4SLinus Torvalds "Cache lockdown\t: %s\n" 9431da177e4SLinus Torvalds "Cache format\t: %s\n", 9441da177e4SLinus Torvalds cache_types[CACHE_TYPE(cache_info)], 9451da177e4SLinus Torvalds cache_clean[CACHE_TYPE(cache_info)], 9461da177e4SLinus Torvalds cache_lockdown[CACHE_TYPE(cache_info)], 9471da177e4SLinus Torvalds CACHE_S(cache_info) ? "Harvard" : "Unified"); 9481da177e4SLinus Torvalds 9491da177e4SLinus Torvalds if (CACHE_S(cache_info)) { 9501da177e4SLinus Torvalds c_show_cache(m, "I", CACHE_ISIZE(cache_info)); 9511da177e4SLinus Torvalds c_show_cache(m, "D", CACHE_DSIZE(cache_info)); 9521da177e4SLinus Torvalds } else { 9531da177e4SLinus Torvalds c_show_cache(m, "Cache", CACHE_ISIZE(cache_info)); 9541da177e4SLinus Torvalds } 9551da177e4SLinus Torvalds } 9561da177e4SLinus Torvalds } 9571da177e4SLinus Torvalds 9581da177e4SLinus Torvalds seq_puts(m, "\n"); 9591da177e4SLinus Torvalds 9601da177e4SLinus Torvalds seq_printf(m, "Hardware\t: %s\n", machine_name); 9611da177e4SLinus Torvalds seq_printf(m, "Revision\t: %04x\n", system_rev); 9621da177e4SLinus Torvalds seq_printf(m, "Serial\t\t: %08x%08x\n", 9631da177e4SLinus Torvalds system_serial_high, system_serial_low); 9641da177e4SLinus Torvalds 9651da177e4SLinus Torvalds return 0; 9661da177e4SLinus Torvalds } 9671da177e4SLinus Torvalds 9681da177e4SLinus Torvalds static void *c_start(struct seq_file *m, loff_t *pos) 9691da177e4SLinus Torvalds { 9701da177e4SLinus Torvalds return *pos < 1 ? (void *)1 : NULL; 9711da177e4SLinus Torvalds } 9721da177e4SLinus Torvalds 9731da177e4SLinus Torvalds static void *c_next(struct seq_file *m, void *v, loff_t *pos) 9741da177e4SLinus Torvalds { 9751da177e4SLinus Torvalds ++*pos; 9761da177e4SLinus Torvalds return NULL; 9771da177e4SLinus Torvalds } 9781da177e4SLinus Torvalds 9791da177e4SLinus Torvalds static void c_stop(struct seq_file *m, void *v) 9801da177e4SLinus Torvalds { 9811da177e4SLinus Torvalds } 9821da177e4SLinus Torvalds 9831da177e4SLinus Torvalds struct seq_operations cpuinfo_op = { 9841da177e4SLinus Torvalds .start = c_start, 9851da177e4SLinus Torvalds .next = c_next, 9861da177e4SLinus Torvalds .stop = c_stop, 9871da177e4SLinus Torvalds .show = c_show 9881da177e4SLinus Torvalds }; 989