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/config.h> 111da177e4SLinus Torvalds #include <linux/module.h> 121da177e4SLinus Torvalds #include <linux/kernel.h> 131da177e4SLinus Torvalds #include <linux/stddef.h> 141da177e4SLinus Torvalds #include <linux/ioport.h> 151da177e4SLinus Torvalds #include <linux/delay.h> 161da177e4SLinus Torvalds #include <linux/utsname.h> 171da177e4SLinus Torvalds #include <linux/initrd.h> 181da177e4SLinus Torvalds #include <linux/console.h> 191da177e4SLinus Torvalds #include <linux/bootmem.h> 201da177e4SLinus Torvalds #include <linux/seq_file.h> 211da177e4SLinus Torvalds #include <linux/tty.h> 221da177e4SLinus Torvalds #include <linux/init.h> 231da177e4SLinus Torvalds #include <linux/root_dev.h> 241da177e4SLinus Torvalds #include <linux/cpu.h> 251da177e4SLinus Torvalds #include <linux/interrupt.h> 267bbb7940SRussell King #include <linux/smp.h> 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds #include <asm/cpu.h> 291da177e4SLinus Torvalds #include <asm/elf.h> 301da177e4SLinus Torvalds #include <asm/procinfo.h> 311da177e4SLinus Torvalds #include <asm/setup.h> 321da177e4SLinus Torvalds #include <asm/mach-types.h> 331da177e4SLinus Torvalds #include <asm/cacheflush.h> 341da177e4SLinus Torvalds #include <asm/tlbflush.h> 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds #include <asm/mach/arch.h> 371da177e4SLinus Torvalds #include <asm/mach/irq.h> 381da177e4SLinus Torvalds #include <asm/mach/time.h> 391da177e4SLinus Torvalds 400fc1c832SBen Dooks #include "compat.h" 410fc1c832SBen Dooks 421da177e4SLinus Torvalds #ifndef MEM_SIZE 431da177e4SLinus Torvalds #define MEM_SIZE (16*1024*1024) 441da177e4SLinus Torvalds #endif 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds #if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE) 471da177e4SLinus Torvalds char fpe_type[8]; 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds static int __init fpe_setup(char *line) 501da177e4SLinus Torvalds { 511da177e4SLinus Torvalds memcpy(fpe_type, line, 8); 521da177e4SLinus Torvalds return 1; 531da177e4SLinus Torvalds } 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds __setup("fpe=", fpe_setup); 561da177e4SLinus Torvalds #endif 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds extern unsigned int mem_fclk_21285; 591da177e4SLinus Torvalds extern void paging_init(struct meminfo *, struct machine_desc *desc); 601da177e4SLinus Torvalds extern void reboot_setup(char *str); 611da177e4SLinus Torvalds extern int root_mountflags; 621da177e4SLinus Torvalds extern void _stext, _text, _etext, __data_start, _edata, _end; 631da177e4SLinus Torvalds 641da177e4SLinus Torvalds unsigned int processor_id; 651da177e4SLinus Torvalds unsigned int __machine_arch_type; 661da177e4SLinus Torvalds EXPORT_SYMBOL(__machine_arch_type); 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds unsigned int system_rev; 691da177e4SLinus Torvalds EXPORT_SYMBOL(system_rev); 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds unsigned int system_serial_low; 721da177e4SLinus Torvalds EXPORT_SYMBOL(system_serial_low); 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds unsigned int system_serial_high; 751da177e4SLinus Torvalds EXPORT_SYMBOL(system_serial_high); 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds unsigned int elf_hwcap; 781da177e4SLinus Torvalds EXPORT_SYMBOL(elf_hwcap); 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds #ifdef MULTI_CPU 821da177e4SLinus Torvalds struct processor processor; 831da177e4SLinus Torvalds #endif 841da177e4SLinus Torvalds #ifdef MULTI_TLB 851da177e4SLinus Torvalds struct cpu_tlb_fns cpu_tlb; 861da177e4SLinus Torvalds #endif 871da177e4SLinus Torvalds #ifdef MULTI_USER 881da177e4SLinus Torvalds struct cpu_user_fns cpu_user; 891da177e4SLinus Torvalds #endif 901da177e4SLinus Torvalds #ifdef MULTI_CACHE 911da177e4SLinus Torvalds struct cpu_cache_fns cpu_cache; 921da177e4SLinus Torvalds #endif 931da177e4SLinus Torvalds 94ccea7a19SRussell King struct stack { 95ccea7a19SRussell King u32 irq[3]; 96ccea7a19SRussell King u32 abt[3]; 97ccea7a19SRussell King u32 und[3]; 98ccea7a19SRussell King } ____cacheline_aligned; 99ccea7a19SRussell King 100ccea7a19SRussell King static struct stack stacks[NR_CPUS]; 101ccea7a19SRussell King 1021da177e4SLinus Torvalds char elf_platform[ELF_PLATFORM_SIZE]; 1031da177e4SLinus Torvalds EXPORT_SYMBOL(elf_platform); 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds unsigned long phys_initrd_start __initdata = 0; 1061da177e4SLinus Torvalds unsigned long phys_initrd_size __initdata = 0; 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds static struct meminfo meminfo __initdata = { 0, }; 1091da177e4SLinus Torvalds static const char *cpu_name; 1101da177e4SLinus Torvalds static const char *machine_name; 1111da177e4SLinus Torvalds static char command_line[COMMAND_LINE_SIZE]; 1121da177e4SLinus Torvalds 1131da177e4SLinus Torvalds static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE; 1141da177e4SLinus Torvalds static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } }; 1151da177e4SLinus Torvalds #define ENDIANNESS ((char)endian_test.l) 1161da177e4SLinus Torvalds 1171da177e4SLinus Torvalds DEFINE_PER_CPU(struct cpuinfo_arm, cpu_data); 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds /* 1201da177e4SLinus Torvalds * Standard memory resources 1211da177e4SLinus Torvalds */ 1221da177e4SLinus Torvalds static struct resource mem_res[] = { 1231da177e4SLinus Torvalds { "Video RAM", 0, 0, IORESOURCE_MEM }, 1241da177e4SLinus Torvalds { "Kernel text", 0, 0, IORESOURCE_MEM }, 1251da177e4SLinus Torvalds { "Kernel data", 0, 0, IORESOURCE_MEM } 1261da177e4SLinus Torvalds }; 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds #define video_ram mem_res[0] 1291da177e4SLinus Torvalds #define kernel_code mem_res[1] 1301da177e4SLinus Torvalds #define kernel_data mem_res[2] 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds static struct resource io_res[] = { 1331da177e4SLinus Torvalds { "reserved", 0x3bc, 0x3be, IORESOURCE_IO | IORESOURCE_BUSY }, 1341da177e4SLinus Torvalds { "reserved", 0x378, 0x37f, IORESOURCE_IO | IORESOURCE_BUSY }, 1351da177e4SLinus Torvalds { "reserved", 0x278, 0x27f, IORESOURCE_IO | IORESOURCE_BUSY } 1361da177e4SLinus Torvalds }; 1371da177e4SLinus Torvalds 1381da177e4SLinus Torvalds #define lp0 io_res[0] 1391da177e4SLinus Torvalds #define lp1 io_res[1] 1401da177e4SLinus Torvalds #define lp2 io_res[2] 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds static const char *cache_types[16] = { 1431da177e4SLinus Torvalds "write-through", 1441da177e4SLinus Torvalds "write-back", 1451da177e4SLinus Torvalds "write-back", 1461da177e4SLinus Torvalds "undefined 3", 1471da177e4SLinus Torvalds "undefined 4", 1481da177e4SLinus Torvalds "undefined 5", 1491da177e4SLinus Torvalds "write-back", 1501da177e4SLinus Torvalds "write-back", 1511da177e4SLinus Torvalds "undefined 8", 1521da177e4SLinus Torvalds "undefined 9", 1531da177e4SLinus Torvalds "undefined 10", 1541da177e4SLinus Torvalds "undefined 11", 1551da177e4SLinus Torvalds "undefined 12", 1561da177e4SLinus Torvalds "undefined 13", 1571da177e4SLinus Torvalds "write-back", 1581da177e4SLinus Torvalds "undefined 15", 1591da177e4SLinus Torvalds }; 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds static const char *cache_clean[16] = { 1621da177e4SLinus Torvalds "not required", 1631da177e4SLinus Torvalds "read-block", 1641da177e4SLinus Torvalds "cp15 c7 ops", 1651da177e4SLinus Torvalds "undefined 3", 1661da177e4SLinus Torvalds "undefined 4", 1671da177e4SLinus Torvalds "undefined 5", 1681da177e4SLinus Torvalds "cp15 c7 ops", 1691da177e4SLinus Torvalds "cp15 c7 ops", 1701da177e4SLinus Torvalds "undefined 8", 1711da177e4SLinus Torvalds "undefined 9", 1721da177e4SLinus Torvalds "undefined 10", 1731da177e4SLinus Torvalds "undefined 11", 1741da177e4SLinus Torvalds "undefined 12", 1751da177e4SLinus Torvalds "undefined 13", 1761da177e4SLinus Torvalds "cp15 c7 ops", 1771da177e4SLinus Torvalds "undefined 15", 1781da177e4SLinus Torvalds }; 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds static const char *cache_lockdown[16] = { 1811da177e4SLinus Torvalds "not supported", 1821da177e4SLinus Torvalds "not supported", 1831da177e4SLinus Torvalds "not supported", 1841da177e4SLinus Torvalds "undefined 3", 1851da177e4SLinus Torvalds "undefined 4", 1861da177e4SLinus Torvalds "undefined 5", 1871da177e4SLinus Torvalds "format A", 1881da177e4SLinus Torvalds "format B", 1891da177e4SLinus Torvalds "undefined 8", 1901da177e4SLinus Torvalds "undefined 9", 1911da177e4SLinus Torvalds "undefined 10", 1921da177e4SLinus Torvalds "undefined 11", 1931da177e4SLinus Torvalds "undefined 12", 1941da177e4SLinus Torvalds "undefined 13", 1951da177e4SLinus Torvalds "format C", 1961da177e4SLinus Torvalds "undefined 15", 1971da177e4SLinus Torvalds }; 1981da177e4SLinus Torvalds 1991da177e4SLinus Torvalds static const char *proc_arch[] = { 2001da177e4SLinus Torvalds "undefined/unknown", 2011da177e4SLinus Torvalds "3", 2021da177e4SLinus Torvalds "4", 2031da177e4SLinus Torvalds "4T", 2041da177e4SLinus Torvalds "5", 2051da177e4SLinus Torvalds "5T", 2061da177e4SLinus Torvalds "5TE", 2071da177e4SLinus Torvalds "5TEJ", 2081da177e4SLinus Torvalds "6TEJ", 2096b090a25SCatalin Marinas "7", 2101da177e4SLinus Torvalds "?(11)", 2111da177e4SLinus Torvalds "?(12)", 2121da177e4SLinus Torvalds "?(13)", 2131da177e4SLinus Torvalds "?(14)", 2141da177e4SLinus Torvalds "?(15)", 2151da177e4SLinus Torvalds "?(16)", 2161da177e4SLinus Torvalds "?(17)", 2171da177e4SLinus Torvalds }; 2181da177e4SLinus Torvalds 2191da177e4SLinus Torvalds #define CACHE_TYPE(x) (((x) >> 25) & 15) 2201da177e4SLinus Torvalds #define CACHE_S(x) ((x) & (1 << 24)) 2211da177e4SLinus Torvalds #define CACHE_DSIZE(x) (((x) >> 12) & 4095) /* only if S=1 */ 2221da177e4SLinus Torvalds #define CACHE_ISIZE(x) ((x) & 4095) 2231da177e4SLinus Torvalds 2241da177e4SLinus Torvalds #define CACHE_SIZE(y) (((y) >> 6) & 7) 2251da177e4SLinus Torvalds #define CACHE_ASSOC(y) (((y) >> 3) & 7) 2261da177e4SLinus Torvalds #define CACHE_M(y) ((y) & (1 << 2)) 2271da177e4SLinus Torvalds #define CACHE_LINE(y) ((y) & 3) 2281da177e4SLinus Torvalds 2291da177e4SLinus Torvalds static inline void dump_cache(const char *prefix, int cpu, unsigned int cache) 2301da177e4SLinus Torvalds { 2311da177e4SLinus Torvalds unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0); 2321da177e4SLinus Torvalds 2331da177e4SLinus Torvalds printk("CPU%u: %s: %d bytes, associativity %d, %d byte lines, %d sets\n", 2341da177e4SLinus Torvalds cpu, prefix, 2351da177e4SLinus Torvalds mult << (8 + CACHE_SIZE(cache)), 2361da177e4SLinus Torvalds (mult << CACHE_ASSOC(cache)) >> 1, 2371da177e4SLinus Torvalds 8 << CACHE_LINE(cache), 2381da177e4SLinus Torvalds 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) - 2391da177e4SLinus Torvalds CACHE_LINE(cache))); 2401da177e4SLinus Torvalds } 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds static void __init dump_cpu_info(int cpu) 2431da177e4SLinus Torvalds { 2441da177e4SLinus Torvalds unsigned int info = read_cpuid(CPUID_CACHETYPE); 2451da177e4SLinus Torvalds 2461da177e4SLinus Torvalds if (info != processor_id) { 2471da177e4SLinus Torvalds printk("CPU%u: D %s %s cache\n", cpu, cache_is_vivt() ? "VIVT" : "VIPT", 2481da177e4SLinus Torvalds cache_types[CACHE_TYPE(info)]); 2491da177e4SLinus Torvalds if (CACHE_S(info)) { 2501da177e4SLinus Torvalds dump_cache("I cache", cpu, CACHE_ISIZE(info)); 2511da177e4SLinus Torvalds dump_cache("D cache", cpu, CACHE_DSIZE(info)); 2521da177e4SLinus Torvalds } else { 2531da177e4SLinus Torvalds dump_cache("cache", cpu, CACHE_ISIZE(info)); 2541da177e4SLinus Torvalds } 2551da177e4SLinus Torvalds } 2561da177e4SLinus Torvalds } 2571da177e4SLinus Torvalds 2581da177e4SLinus Torvalds int cpu_architecture(void) 2591da177e4SLinus Torvalds { 2601da177e4SLinus Torvalds int cpu_arch; 2611da177e4SLinus Torvalds 2626b090a25SCatalin Marinas if ((processor_id & 0x0008f000) == 0) { 2631da177e4SLinus Torvalds cpu_arch = CPU_ARCH_UNKNOWN; 2646b090a25SCatalin Marinas } else if ((processor_id & 0x0008f000) == 0x00007000) { 2651da177e4SLinus Torvalds cpu_arch = (processor_id & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3; 2666b090a25SCatalin Marinas } else if ((processor_id & 0x00080000) == 0x00000000) { 2671da177e4SLinus Torvalds cpu_arch = (processor_id >> 16) & 7; 2681da177e4SLinus Torvalds if (cpu_arch) 2691da177e4SLinus Torvalds cpu_arch += CPU_ARCH_ARMv3; 2706b090a25SCatalin Marinas } else { 2716b090a25SCatalin Marinas /* the revised CPUID */ 2726b090a25SCatalin Marinas cpu_arch = ((processor_id >> 12) & 0xf) - 0xb + CPU_ARCH_ARMv6; 2731da177e4SLinus Torvalds } 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds return cpu_arch; 2761da177e4SLinus Torvalds } 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds /* 2791da177e4SLinus Torvalds * These functions re-use the assembly code in head.S, which 2801da177e4SLinus Torvalds * already provide the required functionality. 2811da177e4SLinus Torvalds */ 2821da177e4SLinus Torvalds extern struct proc_info_list *lookup_processor_type(void); 2831da177e4SLinus Torvalds extern struct machine_desc *lookup_machine_type(unsigned int); 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds static void __init setup_processor(void) 2861da177e4SLinus Torvalds { 2871da177e4SLinus Torvalds struct proc_info_list *list; 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds /* 2901da177e4SLinus Torvalds * locate processor in the list of supported processor 2911da177e4SLinus Torvalds * types. The linker builds this table for us from the 2921da177e4SLinus Torvalds * entries in arch/arm/mm/proc-*.S 2931da177e4SLinus Torvalds */ 2941da177e4SLinus Torvalds list = lookup_processor_type(); 2951da177e4SLinus Torvalds if (!list) { 2961da177e4SLinus Torvalds printk("CPU configuration botched (ID %08x), unable " 2971da177e4SLinus Torvalds "to continue.\n", processor_id); 2981da177e4SLinus Torvalds while (1); 2991da177e4SLinus Torvalds } 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds cpu_name = list->cpu_name; 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds #ifdef MULTI_CPU 3041da177e4SLinus Torvalds processor = *list->proc; 3051da177e4SLinus Torvalds #endif 3061da177e4SLinus Torvalds #ifdef MULTI_TLB 3071da177e4SLinus Torvalds cpu_tlb = *list->tlb; 3081da177e4SLinus Torvalds #endif 3091da177e4SLinus Torvalds #ifdef MULTI_USER 3101da177e4SLinus Torvalds cpu_user = *list->user; 3111da177e4SLinus Torvalds #endif 3121da177e4SLinus Torvalds #ifdef MULTI_CACHE 3131da177e4SLinus Torvalds cpu_cache = *list->cache; 3141da177e4SLinus Torvalds #endif 3151da177e4SLinus Torvalds 3161da177e4SLinus Torvalds printk("CPU: %s [%08x] revision %d (ARMv%s)\n", 3171da177e4SLinus Torvalds cpu_name, processor_id, (int)processor_id & 15, 3181da177e4SLinus Torvalds proc_arch[cpu_architecture()]); 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvalds sprintf(system_utsname.machine, "%s%c", list->arch_name, ENDIANNESS); 3211da177e4SLinus Torvalds sprintf(elf_platform, "%s%c", list->elf_name, ENDIANNESS); 3221da177e4SLinus Torvalds elf_hwcap = list->elf_hwcap; 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds cpu_proc_init(); 3251da177e4SLinus Torvalds } 3261da177e4SLinus Torvalds 327ccea7a19SRussell King /* 328ccea7a19SRussell King * cpu_init - initialise one CPU. 329ccea7a19SRussell King * 330ccea7a19SRussell King * cpu_init dumps the cache information, initialises SMP specific 331ccea7a19SRussell King * information, and sets up the per-CPU stacks. 332ccea7a19SRussell King */ 33336c5ed23SRussell King void cpu_init(void) 334ccea7a19SRussell King { 335ccea7a19SRussell King unsigned int cpu = smp_processor_id(); 336ccea7a19SRussell King struct stack *stk = &stacks[cpu]; 337ccea7a19SRussell King 338ccea7a19SRussell King if (cpu >= NR_CPUS) { 339ccea7a19SRussell King printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu); 340ccea7a19SRussell King BUG(); 341ccea7a19SRussell King } 342ccea7a19SRussell King 34332f8b97cSRussell King if (system_state == SYSTEM_BOOTING) 344ccea7a19SRussell King dump_cpu_info(cpu); 345ccea7a19SRussell King 346ccea7a19SRussell King /* 347ccea7a19SRussell King * setup stacks for re-entrant exception handlers 348ccea7a19SRussell King */ 349ccea7a19SRussell King __asm__ ( 350ccea7a19SRussell King "msr cpsr_c, %1\n\t" 351ccea7a19SRussell King "add sp, %0, %2\n\t" 352ccea7a19SRussell King "msr cpsr_c, %3\n\t" 353ccea7a19SRussell King "add sp, %0, %4\n\t" 354ccea7a19SRussell King "msr cpsr_c, %5\n\t" 355ccea7a19SRussell King "add sp, %0, %6\n\t" 356ccea7a19SRussell King "msr cpsr_c, %7" 357ccea7a19SRussell King : 358ccea7a19SRussell King : "r" (stk), 359ccea7a19SRussell King "I" (PSR_F_BIT | PSR_I_BIT | IRQ_MODE), 360ccea7a19SRussell King "I" (offsetof(struct stack, irq[0])), 361ccea7a19SRussell King "I" (PSR_F_BIT | PSR_I_BIT | ABT_MODE), 362ccea7a19SRussell King "I" (offsetof(struct stack, abt[0])), 363ccea7a19SRussell King "I" (PSR_F_BIT | PSR_I_BIT | UND_MODE), 364ccea7a19SRussell King "I" (offsetof(struct stack, und[0])), 365aaaa3f9eSCatalin Marinas "I" (PSR_F_BIT | PSR_I_BIT | SVC_MODE) 366aaaa3f9eSCatalin Marinas : "r14"); 367ccea7a19SRussell King } 368ccea7a19SRussell King 3691da177e4SLinus Torvalds static struct machine_desc * __init setup_machine(unsigned int nr) 3701da177e4SLinus Torvalds { 3711da177e4SLinus Torvalds struct machine_desc *list; 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds /* 3741da177e4SLinus Torvalds * locate machine in the list of supported machines. 3751da177e4SLinus Torvalds */ 3761da177e4SLinus Torvalds list = lookup_machine_type(nr); 3771da177e4SLinus Torvalds if (!list) { 3781da177e4SLinus Torvalds printk("Machine configuration botched (nr %d), unable " 3791da177e4SLinus Torvalds "to continue.\n", nr); 3801da177e4SLinus Torvalds while (1); 3811da177e4SLinus Torvalds } 3821da177e4SLinus Torvalds 3831da177e4SLinus Torvalds printk("Machine: %s\n", list->name); 3841da177e4SLinus Torvalds 3851da177e4SLinus Torvalds return list; 3861da177e4SLinus Torvalds } 3871da177e4SLinus Torvalds 3881da177e4SLinus Torvalds static void __init early_initrd(char **p) 3891da177e4SLinus Torvalds { 3901da177e4SLinus Torvalds unsigned long start, size; 3911da177e4SLinus Torvalds 3921da177e4SLinus Torvalds start = memparse(*p, p); 3931da177e4SLinus Torvalds if (**p == ',') { 3941da177e4SLinus Torvalds size = memparse((*p) + 1, p); 3951da177e4SLinus Torvalds 3961da177e4SLinus Torvalds phys_initrd_start = start; 3971da177e4SLinus Torvalds phys_initrd_size = size; 3981da177e4SLinus Torvalds } 3991da177e4SLinus Torvalds } 4001da177e4SLinus Torvalds __early_param("initrd=", early_initrd); 4011da177e4SLinus Torvalds 4023a669411SRussell King static void __init add_memory(unsigned long start, unsigned long size) 4033a669411SRussell King { 4043a669411SRussell King /* 4053a669411SRussell King * Ensure that start/size are aligned to a page boundary. 4063a669411SRussell King * Size is appropriately rounded down, start is rounded up. 4073a669411SRussell King */ 4083a669411SRussell King size -= start & ~PAGE_MASK; 4093a669411SRussell King 4103a669411SRussell King meminfo.bank[meminfo.nr_banks].start = PAGE_ALIGN(start); 4113a669411SRussell King meminfo.bank[meminfo.nr_banks].size = size & PAGE_MASK; 4123a669411SRussell King meminfo.bank[meminfo.nr_banks].node = PHYS_TO_NID(start); 4133a669411SRussell King meminfo.nr_banks += 1; 4143a669411SRussell King } 4153a669411SRussell King 4161da177e4SLinus Torvalds /* 4171da177e4SLinus Torvalds * Pick out the memory size. We look for mem=size@start, 4181da177e4SLinus Torvalds * where start and size are "size[KkMm]" 4191da177e4SLinus Torvalds */ 4201da177e4SLinus Torvalds static void __init early_mem(char **p) 4211da177e4SLinus Torvalds { 4221da177e4SLinus Torvalds static int usermem __initdata = 0; 4231da177e4SLinus Torvalds unsigned long size, start; 4241da177e4SLinus Torvalds 4251da177e4SLinus Torvalds /* 4261da177e4SLinus Torvalds * If the user specifies memory size, we 4271da177e4SLinus Torvalds * blow away any automatically generated 4281da177e4SLinus Torvalds * size. 4291da177e4SLinus Torvalds */ 4301da177e4SLinus Torvalds if (usermem == 0) { 4311da177e4SLinus Torvalds usermem = 1; 4321da177e4SLinus Torvalds meminfo.nr_banks = 0; 4331da177e4SLinus Torvalds } 4341da177e4SLinus Torvalds 4351da177e4SLinus Torvalds start = PHYS_OFFSET; 4361da177e4SLinus Torvalds size = memparse(*p, p); 4371da177e4SLinus Torvalds if (**p == '@') 4381da177e4SLinus Torvalds start = memparse(*p + 1, p); 4391da177e4SLinus Torvalds 4403a669411SRussell King add_memory(start, size); 4411da177e4SLinus Torvalds } 4421da177e4SLinus Torvalds __early_param("mem=", early_mem); 4431da177e4SLinus Torvalds 4441da177e4SLinus Torvalds /* 4451da177e4SLinus Torvalds * Initial parsing of the command line. 4461da177e4SLinus Torvalds */ 4471da177e4SLinus Torvalds static void __init parse_cmdline(char **cmdline_p, char *from) 4481da177e4SLinus Torvalds { 4491da177e4SLinus Torvalds char c = ' ', *to = command_line; 4501da177e4SLinus Torvalds int len = 0; 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds for (;;) { 4531da177e4SLinus Torvalds if (c == ' ') { 4541da177e4SLinus Torvalds extern struct early_params __early_begin, __early_end; 4551da177e4SLinus Torvalds struct early_params *p; 4561da177e4SLinus Torvalds 4571da177e4SLinus Torvalds for (p = &__early_begin; p < &__early_end; p++) { 4581da177e4SLinus Torvalds int len = strlen(p->arg); 4591da177e4SLinus Torvalds 4601da177e4SLinus Torvalds if (memcmp(from, p->arg, len) == 0) { 4611da177e4SLinus Torvalds if (to != command_line) 4621da177e4SLinus Torvalds to -= 1; 4631da177e4SLinus Torvalds from += len; 4641da177e4SLinus Torvalds p->fn(&from); 4651da177e4SLinus Torvalds 4661da177e4SLinus Torvalds while (*from != ' ' && *from != '\0') 4671da177e4SLinus Torvalds from++; 4681da177e4SLinus Torvalds break; 4691da177e4SLinus Torvalds } 4701da177e4SLinus Torvalds } 4711da177e4SLinus Torvalds } 4721da177e4SLinus Torvalds c = *from++; 4731da177e4SLinus Torvalds if (!c) 4741da177e4SLinus Torvalds break; 4751da177e4SLinus Torvalds if (COMMAND_LINE_SIZE <= ++len) 4761da177e4SLinus Torvalds break; 4771da177e4SLinus Torvalds *to++ = c; 4781da177e4SLinus Torvalds } 4791da177e4SLinus Torvalds *to = '\0'; 4801da177e4SLinus Torvalds *cmdline_p = command_line; 4811da177e4SLinus Torvalds } 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds static void __init 4841da177e4SLinus Torvalds setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz) 4851da177e4SLinus Torvalds { 4861da177e4SLinus Torvalds #ifdef CONFIG_BLK_DEV_RAM 4871da177e4SLinus Torvalds extern int rd_size, rd_image_start, rd_prompt, rd_doload; 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds rd_image_start = image_start; 4901da177e4SLinus Torvalds rd_prompt = prompt; 4911da177e4SLinus Torvalds rd_doload = doload; 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds if (rd_sz) 4941da177e4SLinus Torvalds rd_size = rd_sz; 4951da177e4SLinus Torvalds #endif 4961da177e4SLinus Torvalds } 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds static void __init 4991da177e4SLinus Torvalds request_standard_resources(struct meminfo *mi, struct machine_desc *mdesc) 5001da177e4SLinus Torvalds { 5011da177e4SLinus Torvalds struct resource *res; 5021da177e4SLinus Torvalds int i; 5031da177e4SLinus Torvalds 5041da177e4SLinus Torvalds kernel_code.start = virt_to_phys(&_text); 5051da177e4SLinus Torvalds kernel_code.end = virt_to_phys(&_etext - 1); 5061da177e4SLinus Torvalds kernel_data.start = virt_to_phys(&__data_start); 5071da177e4SLinus Torvalds kernel_data.end = virt_to_phys(&_end - 1); 5081da177e4SLinus Torvalds 5091da177e4SLinus Torvalds for (i = 0; i < mi->nr_banks; i++) { 5101da177e4SLinus Torvalds unsigned long virt_start, virt_end; 5111da177e4SLinus Torvalds 5121da177e4SLinus Torvalds if (mi->bank[i].size == 0) 5131da177e4SLinus Torvalds continue; 5141da177e4SLinus Torvalds 5151da177e4SLinus Torvalds virt_start = __phys_to_virt(mi->bank[i].start); 5161da177e4SLinus Torvalds virt_end = virt_start + mi->bank[i].size - 1; 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds res = alloc_bootmem_low(sizeof(*res)); 5191da177e4SLinus Torvalds res->name = "System RAM"; 5201da177e4SLinus Torvalds res->start = __virt_to_phys(virt_start); 5211da177e4SLinus Torvalds res->end = __virt_to_phys(virt_end); 5221da177e4SLinus Torvalds res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds request_resource(&iomem_resource, res); 5251da177e4SLinus Torvalds 5261da177e4SLinus Torvalds if (kernel_code.start >= res->start && 5271da177e4SLinus Torvalds kernel_code.end <= res->end) 5281da177e4SLinus Torvalds request_resource(res, &kernel_code); 5291da177e4SLinus Torvalds if (kernel_data.start >= res->start && 5301da177e4SLinus Torvalds kernel_data.end <= res->end) 5311da177e4SLinus Torvalds request_resource(res, &kernel_data); 5321da177e4SLinus Torvalds } 5331da177e4SLinus Torvalds 5341da177e4SLinus Torvalds if (mdesc->video_start) { 5351da177e4SLinus Torvalds video_ram.start = mdesc->video_start; 5361da177e4SLinus Torvalds video_ram.end = mdesc->video_end; 5371da177e4SLinus Torvalds request_resource(&iomem_resource, &video_ram); 5381da177e4SLinus Torvalds } 5391da177e4SLinus Torvalds 5401da177e4SLinus Torvalds /* 5411da177e4SLinus Torvalds * Some machines don't have the possibility of ever 5421da177e4SLinus Torvalds * possessing lp0, lp1 or lp2 5431da177e4SLinus Torvalds */ 5441da177e4SLinus Torvalds if (mdesc->reserve_lp0) 5451da177e4SLinus Torvalds request_resource(&ioport_resource, &lp0); 5461da177e4SLinus Torvalds if (mdesc->reserve_lp1) 5471da177e4SLinus Torvalds request_resource(&ioport_resource, &lp1); 5481da177e4SLinus Torvalds if (mdesc->reserve_lp2) 5491da177e4SLinus Torvalds request_resource(&ioport_resource, &lp2); 5501da177e4SLinus Torvalds } 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds /* 5531da177e4SLinus Torvalds * Tag parsing. 5541da177e4SLinus Torvalds * 5551da177e4SLinus Torvalds * This is the new way of passing data to the kernel at boot time. Rather 5561da177e4SLinus Torvalds * than passing a fixed inflexible structure to the kernel, we pass a list 5571da177e4SLinus Torvalds * of variable-sized tags to the kernel. The first tag must be a ATAG_CORE 5581da177e4SLinus Torvalds * tag for the list to be recognised (to distinguish the tagged list from 5591da177e4SLinus Torvalds * a param_struct). The list is terminated with a zero-length tag (this tag 5601da177e4SLinus Torvalds * is not parsed in any way). 5611da177e4SLinus Torvalds */ 5621da177e4SLinus Torvalds static int __init parse_tag_core(const struct tag *tag) 5631da177e4SLinus Torvalds { 5641da177e4SLinus Torvalds if (tag->hdr.size > 2) { 5651da177e4SLinus Torvalds if ((tag->u.core.flags & 1) == 0) 5661da177e4SLinus Torvalds root_mountflags &= ~MS_RDONLY; 5671da177e4SLinus Torvalds ROOT_DEV = old_decode_dev(tag->u.core.rootdev); 5681da177e4SLinus Torvalds } 5691da177e4SLinus Torvalds return 0; 5701da177e4SLinus Torvalds } 5711da177e4SLinus Torvalds 5721da177e4SLinus Torvalds __tagtable(ATAG_CORE, parse_tag_core); 5731da177e4SLinus Torvalds 5741da177e4SLinus Torvalds static int __init parse_tag_mem32(const struct tag *tag) 5751da177e4SLinus Torvalds { 5761da177e4SLinus Torvalds if (meminfo.nr_banks >= NR_BANKS) { 5771da177e4SLinus Torvalds printk(KERN_WARNING 5781da177e4SLinus Torvalds "Ignoring memory bank 0x%08x size %dKB\n", 5791da177e4SLinus Torvalds tag->u.mem.start, tag->u.mem.size / 1024); 5801da177e4SLinus Torvalds return -EINVAL; 5811da177e4SLinus Torvalds } 5823a669411SRussell King add_memory(tag->u.mem.start, tag->u.mem.size); 5831da177e4SLinus Torvalds return 0; 5841da177e4SLinus Torvalds } 5851da177e4SLinus Torvalds 5861da177e4SLinus Torvalds __tagtable(ATAG_MEM, parse_tag_mem32); 5871da177e4SLinus Torvalds 5881da177e4SLinus Torvalds #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE) 5891da177e4SLinus Torvalds struct screen_info screen_info = { 5901da177e4SLinus Torvalds .orig_video_lines = 30, 5911da177e4SLinus Torvalds .orig_video_cols = 80, 5921da177e4SLinus Torvalds .orig_video_mode = 0, 5931da177e4SLinus Torvalds .orig_video_ega_bx = 0, 5941da177e4SLinus Torvalds .orig_video_isVGA = 1, 5951da177e4SLinus Torvalds .orig_video_points = 8 5961da177e4SLinus Torvalds }; 5971da177e4SLinus Torvalds 5981da177e4SLinus Torvalds static int __init parse_tag_videotext(const struct tag *tag) 5991da177e4SLinus Torvalds { 6001da177e4SLinus Torvalds screen_info.orig_x = tag->u.videotext.x; 6011da177e4SLinus Torvalds screen_info.orig_y = tag->u.videotext.y; 6021da177e4SLinus Torvalds screen_info.orig_video_page = tag->u.videotext.video_page; 6031da177e4SLinus Torvalds screen_info.orig_video_mode = tag->u.videotext.video_mode; 6041da177e4SLinus Torvalds screen_info.orig_video_cols = tag->u.videotext.video_cols; 6051da177e4SLinus Torvalds screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx; 6061da177e4SLinus Torvalds screen_info.orig_video_lines = tag->u.videotext.video_lines; 6071da177e4SLinus Torvalds screen_info.orig_video_isVGA = tag->u.videotext.video_isvga; 6081da177e4SLinus Torvalds screen_info.orig_video_points = tag->u.videotext.video_points; 6091da177e4SLinus Torvalds return 0; 6101da177e4SLinus Torvalds } 6111da177e4SLinus Torvalds 6121da177e4SLinus Torvalds __tagtable(ATAG_VIDEOTEXT, parse_tag_videotext); 6131da177e4SLinus Torvalds #endif 6141da177e4SLinus Torvalds 6151da177e4SLinus Torvalds static int __init parse_tag_ramdisk(const struct tag *tag) 6161da177e4SLinus Torvalds { 6171da177e4SLinus Torvalds setup_ramdisk((tag->u.ramdisk.flags & 1) == 0, 6181da177e4SLinus Torvalds (tag->u.ramdisk.flags & 2) == 0, 6191da177e4SLinus Torvalds tag->u.ramdisk.start, tag->u.ramdisk.size); 6201da177e4SLinus Torvalds return 0; 6211da177e4SLinus Torvalds } 6221da177e4SLinus Torvalds 6231da177e4SLinus Torvalds __tagtable(ATAG_RAMDISK, parse_tag_ramdisk); 6241da177e4SLinus Torvalds 6251da177e4SLinus Torvalds static int __init parse_tag_initrd(const struct tag *tag) 6261da177e4SLinus Torvalds { 6271da177e4SLinus Torvalds printk(KERN_WARNING "ATAG_INITRD is deprecated; " 6281da177e4SLinus Torvalds "please update your bootloader.\n"); 6291da177e4SLinus Torvalds phys_initrd_start = __virt_to_phys(tag->u.initrd.start); 6301da177e4SLinus Torvalds phys_initrd_size = tag->u.initrd.size; 6311da177e4SLinus Torvalds return 0; 6321da177e4SLinus Torvalds } 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds __tagtable(ATAG_INITRD, parse_tag_initrd); 6351da177e4SLinus Torvalds 6361da177e4SLinus Torvalds static int __init parse_tag_initrd2(const struct tag *tag) 6371da177e4SLinus Torvalds { 6381da177e4SLinus Torvalds phys_initrd_start = tag->u.initrd.start; 6391da177e4SLinus Torvalds phys_initrd_size = tag->u.initrd.size; 6401da177e4SLinus Torvalds return 0; 6411da177e4SLinus Torvalds } 6421da177e4SLinus Torvalds 6431da177e4SLinus Torvalds __tagtable(ATAG_INITRD2, parse_tag_initrd2); 6441da177e4SLinus Torvalds 6451da177e4SLinus Torvalds static int __init parse_tag_serialnr(const struct tag *tag) 6461da177e4SLinus Torvalds { 6471da177e4SLinus Torvalds system_serial_low = tag->u.serialnr.low; 6481da177e4SLinus Torvalds system_serial_high = tag->u.serialnr.high; 6491da177e4SLinus Torvalds return 0; 6501da177e4SLinus Torvalds } 6511da177e4SLinus Torvalds 6521da177e4SLinus Torvalds __tagtable(ATAG_SERIAL, parse_tag_serialnr); 6531da177e4SLinus Torvalds 6541da177e4SLinus Torvalds static int __init parse_tag_revision(const struct tag *tag) 6551da177e4SLinus Torvalds { 6561da177e4SLinus Torvalds system_rev = tag->u.revision.rev; 6571da177e4SLinus Torvalds return 0; 6581da177e4SLinus Torvalds } 6591da177e4SLinus Torvalds 6601da177e4SLinus Torvalds __tagtable(ATAG_REVISION, parse_tag_revision); 6611da177e4SLinus Torvalds 6621da177e4SLinus Torvalds static int __init parse_tag_cmdline(const struct tag *tag) 6631da177e4SLinus Torvalds { 6641da177e4SLinus Torvalds strlcpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE); 6651da177e4SLinus Torvalds return 0; 6661da177e4SLinus Torvalds } 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds __tagtable(ATAG_CMDLINE, parse_tag_cmdline); 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds /* 6711da177e4SLinus Torvalds * Scan the tag table for this tag, and call its parse function. 6721da177e4SLinus Torvalds * The tag table is built by the linker from all the __tagtable 6731da177e4SLinus Torvalds * declarations. 6741da177e4SLinus Torvalds */ 6751da177e4SLinus Torvalds static int __init parse_tag(const struct tag *tag) 6761da177e4SLinus Torvalds { 6771da177e4SLinus Torvalds extern struct tagtable __tagtable_begin, __tagtable_end; 6781da177e4SLinus Torvalds struct tagtable *t; 6791da177e4SLinus Torvalds 6801da177e4SLinus Torvalds for (t = &__tagtable_begin; t < &__tagtable_end; t++) 6811da177e4SLinus Torvalds if (tag->hdr.tag == t->tag) { 6821da177e4SLinus Torvalds t->parse(tag); 6831da177e4SLinus Torvalds break; 6841da177e4SLinus Torvalds } 6851da177e4SLinus Torvalds 6861da177e4SLinus Torvalds return t < &__tagtable_end; 6871da177e4SLinus Torvalds } 6881da177e4SLinus Torvalds 6891da177e4SLinus Torvalds /* 6901da177e4SLinus Torvalds * Parse all tags in the list, checking both the global and architecture 6911da177e4SLinus Torvalds * specific tag tables. 6921da177e4SLinus Torvalds */ 6931da177e4SLinus Torvalds static void __init parse_tags(const struct tag *t) 6941da177e4SLinus Torvalds { 6951da177e4SLinus Torvalds for (; t->hdr.size; t = tag_next(t)) 6961da177e4SLinus Torvalds if (!parse_tag(t)) 6971da177e4SLinus Torvalds printk(KERN_WARNING 6981da177e4SLinus Torvalds "Ignoring unrecognised tag 0x%08x\n", 6991da177e4SLinus Torvalds t->hdr.tag); 7001da177e4SLinus Torvalds } 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds /* 7031da177e4SLinus Torvalds * This holds our defaults. 7041da177e4SLinus Torvalds */ 7051da177e4SLinus Torvalds static struct init_tags { 7061da177e4SLinus Torvalds struct tag_header hdr1; 7071da177e4SLinus Torvalds struct tag_core core; 7081da177e4SLinus Torvalds struct tag_header hdr2; 7091da177e4SLinus Torvalds struct tag_mem32 mem; 7101da177e4SLinus Torvalds struct tag_header hdr3; 7111da177e4SLinus Torvalds } init_tags __initdata = { 7121da177e4SLinus Torvalds { tag_size(tag_core), ATAG_CORE }, 7131da177e4SLinus Torvalds { 1, PAGE_SIZE, 0xff }, 7141da177e4SLinus Torvalds { tag_size(tag_mem32), ATAG_MEM }, 7151da177e4SLinus Torvalds { MEM_SIZE, PHYS_OFFSET }, 7161da177e4SLinus Torvalds { 0, ATAG_NONE } 7171da177e4SLinus Torvalds }; 7181da177e4SLinus Torvalds 7191da177e4SLinus Torvalds static void (*init_machine)(void) __initdata; 7201da177e4SLinus Torvalds 7211da177e4SLinus Torvalds static int __init customize_machine(void) 7221da177e4SLinus Torvalds { 7231da177e4SLinus Torvalds /* customizes platform devices, or adds new ones */ 7241da177e4SLinus Torvalds if (init_machine) 7251da177e4SLinus Torvalds init_machine(); 7261da177e4SLinus Torvalds return 0; 7271da177e4SLinus Torvalds } 7281da177e4SLinus Torvalds arch_initcall(customize_machine); 7291da177e4SLinus Torvalds 7301da177e4SLinus Torvalds void __init setup_arch(char **cmdline_p) 7311da177e4SLinus Torvalds { 7321da177e4SLinus Torvalds struct tag *tags = (struct tag *)&init_tags; 7331da177e4SLinus Torvalds struct machine_desc *mdesc; 7341da177e4SLinus Torvalds char *from = default_command_line; 7351da177e4SLinus Torvalds 7361da177e4SLinus Torvalds setup_processor(); 7371da177e4SLinus Torvalds mdesc = setup_machine(machine_arch_type); 7381da177e4SLinus Torvalds machine_name = mdesc->name; 7391da177e4SLinus Torvalds 7401da177e4SLinus Torvalds if (mdesc->soft_reboot) 7411da177e4SLinus Torvalds reboot_setup("s"); 7421da177e4SLinus Torvalds 743f9bd6ea4SRussell King if (mdesc->boot_params) 744f9bd6ea4SRussell King tags = phys_to_virt(mdesc->boot_params); 7451da177e4SLinus Torvalds 7461da177e4SLinus Torvalds /* 7471da177e4SLinus Torvalds * If we have the old style parameters, convert them to 7481da177e4SLinus Torvalds * a tag list. 7491da177e4SLinus Torvalds */ 7501da177e4SLinus Torvalds if (tags->hdr.tag != ATAG_CORE) 7511da177e4SLinus Torvalds convert_to_tag_list(tags); 7521da177e4SLinus Torvalds if (tags->hdr.tag != ATAG_CORE) 7531da177e4SLinus Torvalds tags = (struct tag *)&init_tags; 7541da177e4SLinus Torvalds 7551da177e4SLinus Torvalds if (mdesc->fixup) 7561da177e4SLinus Torvalds mdesc->fixup(mdesc, tags, &from, &meminfo); 7571da177e4SLinus Torvalds 7581da177e4SLinus Torvalds if (tags->hdr.tag == ATAG_CORE) { 7591da177e4SLinus Torvalds if (meminfo.nr_banks != 0) 7601da177e4SLinus Torvalds squash_mem_tags(tags); 7611da177e4SLinus Torvalds parse_tags(tags); 7621da177e4SLinus Torvalds } 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds init_mm.start_code = (unsigned long) &_text; 7651da177e4SLinus Torvalds init_mm.end_code = (unsigned long) &_etext; 7661da177e4SLinus Torvalds init_mm.end_data = (unsigned long) &_edata; 7671da177e4SLinus Torvalds init_mm.brk = (unsigned long) &_end; 7681da177e4SLinus Torvalds 7691da177e4SLinus Torvalds memcpy(saved_command_line, from, COMMAND_LINE_SIZE); 7701da177e4SLinus Torvalds saved_command_line[COMMAND_LINE_SIZE-1] = '\0'; 7711da177e4SLinus Torvalds parse_cmdline(cmdline_p, from); 7721da177e4SLinus Torvalds paging_init(&meminfo, mdesc); 7731da177e4SLinus Torvalds request_standard_resources(&meminfo, mdesc); 7741da177e4SLinus Torvalds 7757bbb7940SRussell King #ifdef CONFIG_SMP 7767bbb7940SRussell King smp_init_cpus(); 7777bbb7940SRussell King #endif 7787bbb7940SRussell King 779ccea7a19SRussell King cpu_init(); 780ccea7a19SRussell King 7811da177e4SLinus Torvalds /* 7821da177e4SLinus Torvalds * Set up various architecture-specific pointers 7831da177e4SLinus Torvalds */ 7841da177e4SLinus Torvalds init_arch_irq = mdesc->init_irq; 7851da177e4SLinus Torvalds system_timer = mdesc->timer; 7861da177e4SLinus Torvalds init_machine = mdesc->init_machine; 7871da177e4SLinus Torvalds 7881da177e4SLinus Torvalds #ifdef CONFIG_VT 7891da177e4SLinus Torvalds #if defined(CONFIG_VGA_CONSOLE) 7901da177e4SLinus Torvalds conswitchp = &vga_con; 7911da177e4SLinus Torvalds #elif defined(CONFIG_DUMMY_CONSOLE) 7921da177e4SLinus Torvalds conswitchp = &dummy_con; 7931da177e4SLinus Torvalds #endif 7941da177e4SLinus Torvalds #endif 7951da177e4SLinus Torvalds } 7961da177e4SLinus Torvalds 7971da177e4SLinus Torvalds 7981da177e4SLinus Torvalds static int __init topology_init(void) 7991da177e4SLinus Torvalds { 8001da177e4SLinus Torvalds int cpu; 8011da177e4SLinus Torvalds 8021da177e4SLinus Torvalds for_each_cpu(cpu) 8031da177e4SLinus Torvalds register_cpu(&per_cpu(cpu_data, cpu).cpu, cpu, NULL); 8041da177e4SLinus Torvalds 8051da177e4SLinus Torvalds return 0; 8061da177e4SLinus Torvalds } 8071da177e4SLinus Torvalds 8081da177e4SLinus Torvalds subsys_initcall(topology_init); 8091da177e4SLinus Torvalds 8101da177e4SLinus Torvalds static const char *hwcap_str[] = { 8111da177e4SLinus Torvalds "swp", 8121da177e4SLinus Torvalds "half", 8131da177e4SLinus Torvalds "thumb", 8141da177e4SLinus Torvalds "26bit", 8151da177e4SLinus Torvalds "fastmult", 8161da177e4SLinus Torvalds "fpa", 8171da177e4SLinus Torvalds "vfp", 8181da177e4SLinus Torvalds "edsp", 8191da177e4SLinus Torvalds "java", 8201da177e4SLinus Torvalds NULL 8211da177e4SLinus Torvalds }; 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds static void 8241da177e4SLinus Torvalds c_show_cache(struct seq_file *m, const char *type, unsigned int cache) 8251da177e4SLinus Torvalds { 8261da177e4SLinus Torvalds unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0); 8271da177e4SLinus Torvalds 8281da177e4SLinus Torvalds seq_printf(m, "%s size\t\t: %d\n" 8291da177e4SLinus Torvalds "%s assoc\t\t: %d\n" 8301da177e4SLinus Torvalds "%s line length\t: %d\n" 8311da177e4SLinus Torvalds "%s sets\t\t: %d\n", 8321da177e4SLinus Torvalds type, mult << (8 + CACHE_SIZE(cache)), 8331da177e4SLinus Torvalds type, (mult << CACHE_ASSOC(cache)) >> 1, 8341da177e4SLinus Torvalds type, 8 << CACHE_LINE(cache), 8351da177e4SLinus Torvalds type, 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) - 8361da177e4SLinus Torvalds CACHE_LINE(cache))); 8371da177e4SLinus Torvalds } 8381da177e4SLinus Torvalds 8391da177e4SLinus Torvalds static int c_show(struct seq_file *m, void *v) 8401da177e4SLinus Torvalds { 8411da177e4SLinus Torvalds int i; 8421da177e4SLinus Torvalds 8431da177e4SLinus Torvalds seq_printf(m, "Processor\t: %s rev %d (%s)\n", 8441da177e4SLinus Torvalds cpu_name, (int)processor_id & 15, elf_platform); 8451da177e4SLinus Torvalds 8461da177e4SLinus Torvalds #if defined(CONFIG_SMP) 8471da177e4SLinus Torvalds for_each_online_cpu(i) { 84815559722SRussell King /* 84915559722SRussell King * glibc reads /proc/cpuinfo to determine the number of 85015559722SRussell King * online processors, looking for lines beginning with 85115559722SRussell King * "processor". Give glibc what it expects. 85215559722SRussell King */ 85315559722SRussell King seq_printf(m, "processor\t: %d\n", i); 8541da177e4SLinus Torvalds seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n", 8551da177e4SLinus Torvalds per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ), 8561da177e4SLinus Torvalds (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100); 8571da177e4SLinus Torvalds } 8581da177e4SLinus Torvalds #else /* CONFIG_SMP */ 8591da177e4SLinus Torvalds seq_printf(m, "BogoMIPS\t: %lu.%02lu\n", 8601da177e4SLinus Torvalds loops_per_jiffy / (500000/HZ), 8611da177e4SLinus Torvalds (loops_per_jiffy / (5000/HZ)) % 100); 8621da177e4SLinus Torvalds #endif 8631da177e4SLinus Torvalds 8641da177e4SLinus Torvalds /* dump out the processor features */ 8651da177e4SLinus Torvalds seq_puts(m, "Features\t: "); 8661da177e4SLinus Torvalds 8671da177e4SLinus Torvalds for (i = 0; hwcap_str[i]; i++) 8681da177e4SLinus Torvalds if (elf_hwcap & (1 << i)) 8691da177e4SLinus Torvalds seq_printf(m, "%s ", hwcap_str[i]); 8701da177e4SLinus Torvalds 8711da177e4SLinus Torvalds seq_printf(m, "\nCPU implementer\t: 0x%02x\n", processor_id >> 24); 8721da177e4SLinus Torvalds seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]); 8731da177e4SLinus Torvalds 8746b090a25SCatalin Marinas if ((processor_id & 0x0008f000) == 0x00000000) { 8751da177e4SLinus Torvalds /* pre-ARM7 */ 8761da177e4SLinus Torvalds seq_printf(m, "CPU part\t\t: %07x\n", processor_id >> 4); 8771da177e4SLinus Torvalds } else { 8786b090a25SCatalin Marinas if ((processor_id & 0x0008f000) == 0x00007000) { 8791da177e4SLinus Torvalds /* ARM7 */ 8801da177e4SLinus Torvalds seq_printf(m, "CPU variant\t: 0x%02x\n", 8811da177e4SLinus Torvalds (processor_id >> 16) & 127); 8821da177e4SLinus Torvalds } else { 8831da177e4SLinus Torvalds /* post-ARM7 */ 8841da177e4SLinus Torvalds seq_printf(m, "CPU variant\t: 0x%x\n", 8851da177e4SLinus Torvalds (processor_id >> 20) & 15); 8861da177e4SLinus Torvalds } 8871da177e4SLinus Torvalds seq_printf(m, "CPU part\t: 0x%03x\n", 8881da177e4SLinus Torvalds (processor_id >> 4) & 0xfff); 8891da177e4SLinus Torvalds } 8901da177e4SLinus Torvalds seq_printf(m, "CPU revision\t: %d\n", processor_id & 15); 8911da177e4SLinus Torvalds 8921da177e4SLinus Torvalds { 8931da177e4SLinus Torvalds unsigned int cache_info = read_cpuid(CPUID_CACHETYPE); 8941da177e4SLinus Torvalds if (cache_info != processor_id) { 8951da177e4SLinus Torvalds seq_printf(m, "Cache type\t: %s\n" 8961da177e4SLinus Torvalds "Cache clean\t: %s\n" 8971da177e4SLinus Torvalds "Cache lockdown\t: %s\n" 8981da177e4SLinus Torvalds "Cache format\t: %s\n", 8991da177e4SLinus Torvalds cache_types[CACHE_TYPE(cache_info)], 9001da177e4SLinus Torvalds cache_clean[CACHE_TYPE(cache_info)], 9011da177e4SLinus Torvalds cache_lockdown[CACHE_TYPE(cache_info)], 9021da177e4SLinus Torvalds CACHE_S(cache_info) ? "Harvard" : "Unified"); 9031da177e4SLinus Torvalds 9041da177e4SLinus Torvalds if (CACHE_S(cache_info)) { 9051da177e4SLinus Torvalds c_show_cache(m, "I", CACHE_ISIZE(cache_info)); 9061da177e4SLinus Torvalds c_show_cache(m, "D", CACHE_DSIZE(cache_info)); 9071da177e4SLinus Torvalds } else { 9081da177e4SLinus Torvalds c_show_cache(m, "Cache", CACHE_ISIZE(cache_info)); 9091da177e4SLinus Torvalds } 9101da177e4SLinus Torvalds } 9111da177e4SLinus Torvalds } 9121da177e4SLinus Torvalds 9131da177e4SLinus Torvalds seq_puts(m, "\n"); 9141da177e4SLinus Torvalds 9151da177e4SLinus Torvalds seq_printf(m, "Hardware\t: %s\n", machine_name); 9161da177e4SLinus Torvalds seq_printf(m, "Revision\t: %04x\n", system_rev); 9171da177e4SLinus Torvalds seq_printf(m, "Serial\t\t: %08x%08x\n", 9181da177e4SLinus Torvalds system_serial_high, system_serial_low); 9191da177e4SLinus Torvalds 9201da177e4SLinus Torvalds return 0; 9211da177e4SLinus Torvalds } 9221da177e4SLinus Torvalds 9231da177e4SLinus Torvalds static void *c_start(struct seq_file *m, loff_t *pos) 9241da177e4SLinus Torvalds { 9251da177e4SLinus Torvalds return *pos < 1 ? (void *)1 : NULL; 9261da177e4SLinus Torvalds } 9271da177e4SLinus Torvalds 9281da177e4SLinus Torvalds static void *c_next(struct seq_file *m, void *v, loff_t *pos) 9291da177e4SLinus Torvalds { 9301da177e4SLinus Torvalds ++*pos; 9311da177e4SLinus Torvalds return NULL; 9321da177e4SLinus Torvalds } 9331da177e4SLinus Torvalds 9341da177e4SLinus Torvalds static void c_stop(struct seq_file *m, void *v) 9351da177e4SLinus Torvalds { 9361da177e4SLinus Torvalds } 9371da177e4SLinus Torvalds 9381da177e4SLinus Torvalds struct seq_operations cpuinfo_op = { 9391da177e4SLinus Torvalds .start = c_start, 9401da177e4SLinus Torvalds .next = c_next, 9411da177e4SLinus Torvalds .stop = c_stop, 9421da177e4SLinus Torvalds .show = c_show 9431da177e4SLinus Torvalds }; 944