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 void paging_init(struct meminfo *, struct machine_desc *desc); 591da177e4SLinus Torvalds extern void reboot_setup(char *str); 601da177e4SLinus Torvalds extern int root_mountflags; 611da177e4SLinus Torvalds extern void _stext, _text, _etext, __data_start, _edata, _end; 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds unsigned int processor_id; 641da177e4SLinus Torvalds unsigned int __machine_arch_type; 651da177e4SLinus Torvalds EXPORT_SYMBOL(__machine_arch_type); 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds unsigned int system_rev; 681da177e4SLinus Torvalds EXPORT_SYMBOL(system_rev); 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds unsigned int system_serial_low; 711da177e4SLinus Torvalds EXPORT_SYMBOL(system_serial_low); 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds unsigned int system_serial_high; 741da177e4SLinus Torvalds EXPORT_SYMBOL(system_serial_high); 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds unsigned int elf_hwcap; 771da177e4SLinus Torvalds EXPORT_SYMBOL(elf_hwcap); 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds #ifdef MULTI_CPU 811da177e4SLinus Torvalds struct processor processor; 821da177e4SLinus Torvalds #endif 831da177e4SLinus Torvalds #ifdef MULTI_TLB 841da177e4SLinus Torvalds struct cpu_tlb_fns cpu_tlb; 851da177e4SLinus Torvalds #endif 861da177e4SLinus Torvalds #ifdef MULTI_USER 871da177e4SLinus Torvalds struct cpu_user_fns cpu_user; 881da177e4SLinus Torvalds #endif 891da177e4SLinus Torvalds #ifdef MULTI_CACHE 901da177e4SLinus Torvalds struct cpu_cache_fns cpu_cache; 911da177e4SLinus Torvalds #endif 921da177e4SLinus Torvalds 93ccea7a19SRussell King struct stack { 94ccea7a19SRussell King u32 irq[3]; 95ccea7a19SRussell King u32 abt[3]; 96ccea7a19SRussell King u32 und[3]; 97ccea7a19SRussell King } ____cacheline_aligned; 98ccea7a19SRussell King 99ccea7a19SRussell King static struct stack stacks[NR_CPUS]; 100ccea7a19SRussell King 1011da177e4SLinus Torvalds char elf_platform[ELF_PLATFORM_SIZE]; 1021da177e4SLinus Torvalds EXPORT_SYMBOL(elf_platform); 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds unsigned long phys_initrd_start __initdata = 0; 1051da177e4SLinus Torvalds unsigned long phys_initrd_size __initdata = 0; 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds static struct meminfo meminfo __initdata = { 0, }; 1081da177e4SLinus Torvalds static const char *cpu_name; 1091da177e4SLinus Torvalds static const char *machine_name; 1101da177e4SLinus Torvalds static char command_line[COMMAND_LINE_SIZE]; 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE; 1131da177e4SLinus Torvalds static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } }; 1141da177e4SLinus Torvalds #define ENDIANNESS ((char)endian_test.l) 1151da177e4SLinus Torvalds 1161da177e4SLinus Torvalds DEFINE_PER_CPU(struct cpuinfo_arm, cpu_data); 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds /* 1191da177e4SLinus Torvalds * Standard memory resources 1201da177e4SLinus Torvalds */ 1211da177e4SLinus Torvalds static struct resource mem_res[] = { 1221da177e4SLinus Torvalds { "Video RAM", 0, 0, IORESOURCE_MEM }, 1231da177e4SLinus Torvalds { "Kernel text", 0, 0, IORESOURCE_MEM }, 1241da177e4SLinus Torvalds { "Kernel data", 0, 0, IORESOURCE_MEM } 1251da177e4SLinus Torvalds }; 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds #define video_ram mem_res[0] 1281da177e4SLinus Torvalds #define kernel_code mem_res[1] 1291da177e4SLinus Torvalds #define kernel_data mem_res[2] 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds static struct resource io_res[] = { 1321da177e4SLinus Torvalds { "reserved", 0x3bc, 0x3be, IORESOURCE_IO | IORESOURCE_BUSY }, 1331da177e4SLinus Torvalds { "reserved", 0x378, 0x37f, IORESOURCE_IO | IORESOURCE_BUSY }, 1341da177e4SLinus Torvalds { "reserved", 0x278, 0x27f, IORESOURCE_IO | IORESOURCE_BUSY } 1351da177e4SLinus Torvalds }; 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvalds #define lp0 io_res[0] 1381da177e4SLinus Torvalds #define lp1 io_res[1] 1391da177e4SLinus Torvalds #define lp2 io_res[2] 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds static const char *cache_types[16] = { 1421da177e4SLinus Torvalds "write-through", 1431da177e4SLinus Torvalds "write-back", 1441da177e4SLinus Torvalds "write-back", 1451da177e4SLinus Torvalds "undefined 3", 1461da177e4SLinus Torvalds "undefined 4", 1471da177e4SLinus Torvalds "undefined 5", 1481da177e4SLinus Torvalds "write-back", 1491da177e4SLinus Torvalds "write-back", 1501da177e4SLinus Torvalds "undefined 8", 1511da177e4SLinus Torvalds "undefined 9", 1521da177e4SLinus Torvalds "undefined 10", 1531da177e4SLinus Torvalds "undefined 11", 1541da177e4SLinus Torvalds "undefined 12", 1551da177e4SLinus Torvalds "undefined 13", 1561da177e4SLinus Torvalds "write-back", 1571da177e4SLinus Torvalds "undefined 15", 1581da177e4SLinus Torvalds }; 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds static const char *cache_clean[16] = { 1611da177e4SLinus Torvalds "not required", 1621da177e4SLinus Torvalds "read-block", 1631da177e4SLinus Torvalds "cp15 c7 ops", 1641da177e4SLinus Torvalds "undefined 3", 1651da177e4SLinus Torvalds "undefined 4", 1661da177e4SLinus Torvalds "undefined 5", 1671da177e4SLinus Torvalds "cp15 c7 ops", 1681da177e4SLinus Torvalds "cp15 c7 ops", 1691da177e4SLinus Torvalds "undefined 8", 1701da177e4SLinus Torvalds "undefined 9", 1711da177e4SLinus Torvalds "undefined 10", 1721da177e4SLinus Torvalds "undefined 11", 1731da177e4SLinus Torvalds "undefined 12", 1741da177e4SLinus Torvalds "undefined 13", 1751da177e4SLinus Torvalds "cp15 c7 ops", 1761da177e4SLinus Torvalds "undefined 15", 1771da177e4SLinus Torvalds }; 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds static const char *cache_lockdown[16] = { 1801da177e4SLinus Torvalds "not supported", 1811da177e4SLinus Torvalds "not supported", 1821da177e4SLinus Torvalds "not supported", 1831da177e4SLinus Torvalds "undefined 3", 1841da177e4SLinus Torvalds "undefined 4", 1851da177e4SLinus Torvalds "undefined 5", 1861da177e4SLinus Torvalds "format A", 1871da177e4SLinus Torvalds "format B", 1881da177e4SLinus Torvalds "undefined 8", 1891da177e4SLinus Torvalds "undefined 9", 1901da177e4SLinus Torvalds "undefined 10", 1911da177e4SLinus Torvalds "undefined 11", 1921da177e4SLinus Torvalds "undefined 12", 1931da177e4SLinus Torvalds "undefined 13", 1941da177e4SLinus Torvalds "format C", 1951da177e4SLinus Torvalds "undefined 15", 1961da177e4SLinus Torvalds }; 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvalds static const char *proc_arch[] = { 1991da177e4SLinus Torvalds "undefined/unknown", 2001da177e4SLinus Torvalds "3", 2011da177e4SLinus Torvalds "4", 2021da177e4SLinus Torvalds "4T", 2031da177e4SLinus Torvalds "5", 2041da177e4SLinus Torvalds "5T", 2051da177e4SLinus Torvalds "5TE", 2061da177e4SLinus Torvalds "5TEJ", 2071da177e4SLinus Torvalds "6TEJ", 2086b090a25SCatalin Marinas "7", 2091da177e4SLinus Torvalds "?(11)", 2101da177e4SLinus Torvalds "?(12)", 2111da177e4SLinus Torvalds "?(13)", 2121da177e4SLinus Torvalds "?(14)", 2131da177e4SLinus Torvalds "?(15)", 2141da177e4SLinus Torvalds "?(16)", 2151da177e4SLinus Torvalds "?(17)", 2161da177e4SLinus Torvalds }; 2171da177e4SLinus Torvalds 2181da177e4SLinus Torvalds #define CACHE_TYPE(x) (((x) >> 25) & 15) 2191da177e4SLinus Torvalds #define CACHE_S(x) ((x) & (1 << 24)) 2201da177e4SLinus Torvalds #define CACHE_DSIZE(x) (((x) >> 12) & 4095) /* only if S=1 */ 2211da177e4SLinus Torvalds #define CACHE_ISIZE(x) ((x) & 4095) 2221da177e4SLinus Torvalds 2231da177e4SLinus Torvalds #define CACHE_SIZE(y) (((y) >> 6) & 7) 2241da177e4SLinus Torvalds #define CACHE_ASSOC(y) (((y) >> 3) & 7) 2251da177e4SLinus Torvalds #define CACHE_M(y) ((y) & (1 << 2)) 2261da177e4SLinus Torvalds #define CACHE_LINE(y) ((y) & 3) 2271da177e4SLinus Torvalds 2281da177e4SLinus Torvalds static inline void dump_cache(const char *prefix, int cpu, unsigned int cache) 2291da177e4SLinus Torvalds { 2301da177e4SLinus Torvalds unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0); 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds printk("CPU%u: %s: %d bytes, associativity %d, %d byte lines, %d sets\n", 2331da177e4SLinus Torvalds cpu, prefix, 2341da177e4SLinus Torvalds mult << (8 + CACHE_SIZE(cache)), 2351da177e4SLinus Torvalds (mult << CACHE_ASSOC(cache)) >> 1, 2361da177e4SLinus Torvalds 8 << CACHE_LINE(cache), 2371da177e4SLinus Torvalds 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) - 2381da177e4SLinus Torvalds CACHE_LINE(cache))); 2391da177e4SLinus Torvalds } 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds static void __init dump_cpu_info(int cpu) 2421da177e4SLinus Torvalds { 2431da177e4SLinus Torvalds unsigned int info = read_cpuid(CPUID_CACHETYPE); 2441da177e4SLinus Torvalds 2451da177e4SLinus Torvalds if (info != processor_id) { 2461da177e4SLinus Torvalds printk("CPU%u: D %s %s cache\n", cpu, cache_is_vivt() ? "VIVT" : "VIPT", 2471da177e4SLinus Torvalds cache_types[CACHE_TYPE(info)]); 2481da177e4SLinus Torvalds if (CACHE_S(info)) { 2491da177e4SLinus Torvalds dump_cache("I cache", cpu, CACHE_ISIZE(info)); 2501da177e4SLinus Torvalds dump_cache("D cache", cpu, CACHE_DSIZE(info)); 2511da177e4SLinus Torvalds } else { 2521da177e4SLinus Torvalds dump_cache("cache", cpu, CACHE_ISIZE(info)); 2531da177e4SLinus Torvalds } 2541da177e4SLinus Torvalds } 25523759dc6SLennert Buytenhek 25623759dc6SLennert Buytenhek if (arch_is_coherent()) 25723759dc6SLennert Buytenhek printk("Cache coherency enabled\n"); 2581da177e4SLinus Torvalds } 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds int cpu_architecture(void) 2611da177e4SLinus Torvalds { 2621da177e4SLinus Torvalds int cpu_arch; 2631da177e4SLinus Torvalds 2646b090a25SCatalin Marinas if ((processor_id & 0x0008f000) == 0) { 2651da177e4SLinus Torvalds cpu_arch = CPU_ARCH_UNKNOWN; 2666b090a25SCatalin Marinas } else if ((processor_id & 0x0008f000) == 0x00007000) { 2671da177e4SLinus Torvalds cpu_arch = (processor_id & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3; 2686b090a25SCatalin Marinas } else if ((processor_id & 0x00080000) == 0x00000000) { 2691da177e4SLinus Torvalds cpu_arch = (processor_id >> 16) & 7; 2701da177e4SLinus Torvalds if (cpu_arch) 2711da177e4SLinus Torvalds cpu_arch += CPU_ARCH_ARMv3; 2726b090a25SCatalin Marinas } else { 2736b090a25SCatalin Marinas /* the revised CPUID */ 2746b090a25SCatalin Marinas cpu_arch = ((processor_id >> 12) & 0xf) - 0xb + CPU_ARCH_ARMv6; 2751da177e4SLinus Torvalds } 2761da177e4SLinus Torvalds 2771da177e4SLinus Torvalds return cpu_arch; 2781da177e4SLinus Torvalds } 2791da177e4SLinus Torvalds 2801da177e4SLinus Torvalds /* 2811da177e4SLinus Torvalds * These functions re-use the assembly code in head.S, which 2821da177e4SLinus Torvalds * already provide the required functionality. 2831da177e4SLinus Torvalds */ 2840f44ba1dSRussell King extern struct proc_info_list *lookup_processor_type(unsigned int); 2851da177e4SLinus Torvalds extern struct machine_desc *lookup_machine_type(unsigned int); 2861da177e4SLinus Torvalds 2871da177e4SLinus Torvalds static void __init setup_processor(void) 2881da177e4SLinus Torvalds { 2891da177e4SLinus Torvalds struct proc_info_list *list; 2901da177e4SLinus Torvalds 2911da177e4SLinus Torvalds /* 2921da177e4SLinus Torvalds * locate processor in the list of supported processor 2931da177e4SLinus Torvalds * types. The linker builds this table for us from the 2941da177e4SLinus Torvalds * entries in arch/arm/mm/proc-*.S 2951da177e4SLinus Torvalds */ 2960f44ba1dSRussell King list = lookup_processor_type(processor_id); 2971da177e4SLinus Torvalds if (!list) { 2981da177e4SLinus Torvalds printk("CPU configuration botched (ID %08x), unable " 2991da177e4SLinus Torvalds "to continue.\n", processor_id); 3001da177e4SLinus Torvalds while (1); 3011da177e4SLinus Torvalds } 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds cpu_name = list->cpu_name; 3041da177e4SLinus Torvalds 3051da177e4SLinus Torvalds #ifdef MULTI_CPU 3061da177e4SLinus Torvalds processor = *list->proc; 3071da177e4SLinus Torvalds #endif 3081da177e4SLinus Torvalds #ifdef MULTI_TLB 3091da177e4SLinus Torvalds cpu_tlb = *list->tlb; 3101da177e4SLinus Torvalds #endif 3111da177e4SLinus Torvalds #ifdef MULTI_USER 3121da177e4SLinus Torvalds cpu_user = *list->user; 3131da177e4SLinus Torvalds #endif 3141da177e4SLinus Torvalds #ifdef MULTI_CACHE 3151da177e4SLinus Torvalds cpu_cache = *list->cache; 3161da177e4SLinus Torvalds #endif 3171da177e4SLinus Torvalds 318264edb35SRussell King printk("CPU: %s [%08x] revision %d (ARMv%s), cr=%08x\n", 3191da177e4SLinus Torvalds cpu_name, processor_id, (int)processor_id & 15, 320264edb35SRussell King proc_arch[cpu_architecture()], cr_alignment); 3211da177e4SLinus Torvalds 3221da177e4SLinus Torvalds sprintf(system_utsname.machine, "%s%c", list->arch_name, ENDIANNESS); 3231da177e4SLinus Torvalds sprintf(elf_platform, "%s%c", list->elf_name, ENDIANNESS); 3241da177e4SLinus Torvalds elf_hwcap = list->elf_hwcap; 325adeff422SCatalin Marinas #ifndef CONFIG_ARM_THUMB 326adeff422SCatalin Marinas elf_hwcap &= ~HWCAP_THUMB; 327adeff422SCatalin Marinas #endif 328adeff422SCatalin Marinas #ifndef CONFIG_VFP 329adeff422SCatalin Marinas elf_hwcap &= ~HWCAP_VFP; 330adeff422SCatalin Marinas #endif 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds cpu_proc_init(); 3331da177e4SLinus Torvalds } 3341da177e4SLinus Torvalds 335ccea7a19SRussell King /* 336ccea7a19SRussell King * cpu_init - initialise one CPU. 337ccea7a19SRussell King * 338ccea7a19SRussell King * cpu_init dumps the cache information, initialises SMP specific 339ccea7a19SRussell King * information, and sets up the per-CPU stacks. 340ccea7a19SRussell King */ 34136c5ed23SRussell King void cpu_init(void) 342ccea7a19SRussell King { 343ccea7a19SRussell King unsigned int cpu = smp_processor_id(); 344ccea7a19SRussell King struct stack *stk = &stacks[cpu]; 345ccea7a19SRussell King 346ccea7a19SRussell King if (cpu >= NR_CPUS) { 347ccea7a19SRussell King printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu); 348ccea7a19SRussell King BUG(); 349ccea7a19SRussell King } 350ccea7a19SRussell King 35132f8b97cSRussell King if (system_state == SYSTEM_BOOTING) 352ccea7a19SRussell King dump_cpu_info(cpu); 353ccea7a19SRussell King 354ccea7a19SRussell King /* 355ccea7a19SRussell King * setup stacks for re-entrant exception handlers 356ccea7a19SRussell King */ 357ccea7a19SRussell King __asm__ ( 358ccea7a19SRussell King "msr cpsr_c, %1\n\t" 359ccea7a19SRussell King "add sp, %0, %2\n\t" 360ccea7a19SRussell King "msr cpsr_c, %3\n\t" 361ccea7a19SRussell King "add sp, %0, %4\n\t" 362ccea7a19SRussell King "msr cpsr_c, %5\n\t" 363ccea7a19SRussell King "add sp, %0, %6\n\t" 364ccea7a19SRussell King "msr cpsr_c, %7" 365ccea7a19SRussell King : 366ccea7a19SRussell King : "r" (stk), 367ccea7a19SRussell King "I" (PSR_F_BIT | PSR_I_BIT | IRQ_MODE), 368ccea7a19SRussell King "I" (offsetof(struct stack, irq[0])), 369ccea7a19SRussell King "I" (PSR_F_BIT | PSR_I_BIT | ABT_MODE), 370ccea7a19SRussell King "I" (offsetof(struct stack, abt[0])), 371ccea7a19SRussell King "I" (PSR_F_BIT | PSR_I_BIT | UND_MODE), 372ccea7a19SRussell King "I" (offsetof(struct stack, und[0])), 373aaaa3f9eSCatalin Marinas "I" (PSR_F_BIT | PSR_I_BIT | SVC_MODE) 374aaaa3f9eSCatalin Marinas : "r14"); 375ccea7a19SRussell King } 376ccea7a19SRussell King 3771da177e4SLinus Torvalds static struct machine_desc * __init setup_machine(unsigned int nr) 3781da177e4SLinus Torvalds { 3791da177e4SLinus Torvalds struct machine_desc *list; 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvalds /* 3821da177e4SLinus Torvalds * locate machine in the list of supported machines. 3831da177e4SLinus Torvalds */ 3841da177e4SLinus Torvalds list = lookup_machine_type(nr); 3851da177e4SLinus Torvalds if (!list) { 3861da177e4SLinus Torvalds printk("Machine configuration botched (nr %d), unable " 3871da177e4SLinus Torvalds "to continue.\n", nr); 3881da177e4SLinus Torvalds while (1); 3891da177e4SLinus Torvalds } 3901da177e4SLinus Torvalds 3911da177e4SLinus Torvalds printk("Machine: %s\n", list->name); 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds return list; 3941da177e4SLinus Torvalds } 3951da177e4SLinus Torvalds 3961da177e4SLinus Torvalds static void __init early_initrd(char **p) 3971da177e4SLinus Torvalds { 3981da177e4SLinus Torvalds unsigned long start, size; 3991da177e4SLinus Torvalds 4001da177e4SLinus Torvalds start = memparse(*p, p); 4011da177e4SLinus Torvalds if (**p == ',') { 4021da177e4SLinus Torvalds size = memparse((*p) + 1, p); 4031da177e4SLinus Torvalds 4041da177e4SLinus Torvalds phys_initrd_start = start; 4051da177e4SLinus Torvalds phys_initrd_size = size; 4061da177e4SLinus Torvalds } 4071da177e4SLinus Torvalds } 4081da177e4SLinus Torvalds __early_param("initrd=", early_initrd); 4091da177e4SLinus Torvalds 4101c97b73eSAndrew Morton static void __init arm_add_memory(unsigned long start, unsigned long size) 4113a669411SRussell King { 4123a669411SRussell King /* 4133a669411SRussell King * Ensure that start/size are aligned to a page boundary. 4143a669411SRussell King * Size is appropriately rounded down, start is rounded up. 4153a669411SRussell King */ 4163a669411SRussell King size -= start & ~PAGE_MASK; 4173a669411SRussell King 4183a669411SRussell King meminfo.bank[meminfo.nr_banks].start = PAGE_ALIGN(start); 4193a669411SRussell King meminfo.bank[meminfo.nr_banks].size = size & PAGE_MASK; 4203a669411SRussell King meminfo.bank[meminfo.nr_banks].node = PHYS_TO_NID(start); 4213a669411SRussell King meminfo.nr_banks += 1; 4223a669411SRussell King } 4233a669411SRussell King 4241da177e4SLinus Torvalds /* 4251da177e4SLinus Torvalds * Pick out the memory size. We look for mem=size@start, 4261da177e4SLinus Torvalds * where start and size are "size[KkMm]" 4271da177e4SLinus Torvalds */ 4281da177e4SLinus Torvalds static void __init early_mem(char **p) 4291da177e4SLinus Torvalds { 4301da177e4SLinus Torvalds static int usermem __initdata = 0; 4311da177e4SLinus Torvalds unsigned long size, start; 4321da177e4SLinus Torvalds 4331da177e4SLinus Torvalds /* 4341da177e4SLinus Torvalds * If the user specifies memory size, we 4351da177e4SLinus Torvalds * blow away any automatically generated 4361da177e4SLinus Torvalds * size. 4371da177e4SLinus Torvalds */ 4381da177e4SLinus Torvalds if (usermem == 0) { 4391da177e4SLinus Torvalds usermem = 1; 4401da177e4SLinus Torvalds meminfo.nr_banks = 0; 4411da177e4SLinus Torvalds } 4421da177e4SLinus Torvalds 4431da177e4SLinus Torvalds start = PHYS_OFFSET; 4441da177e4SLinus Torvalds size = memparse(*p, p); 4451da177e4SLinus Torvalds if (**p == '@') 4461da177e4SLinus Torvalds start = memparse(*p + 1, p); 4471da177e4SLinus Torvalds 4481c97b73eSAndrew Morton arm_add_memory(start, size); 4491da177e4SLinus Torvalds } 4501da177e4SLinus Torvalds __early_param("mem=", early_mem); 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds /* 4531da177e4SLinus Torvalds * Initial parsing of the command line. 4541da177e4SLinus Torvalds */ 4551da177e4SLinus Torvalds static void __init parse_cmdline(char **cmdline_p, char *from) 4561da177e4SLinus Torvalds { 4571da177e4SLinus Torvalds char c = ' ', *to = command_line; 4581da177e4SLinus Torvalds int len = 0; 4591da177e4SLinus Torvalds 4601da177e4SLinus Torvalds for (;;) { 4611da177e4SLinus Torvalds if (c == ' ') { 4621da177e4SLinus Torvalds extern struct early_params __early_begin, __early_end; 4631da177e4SLinus Torvalds struct early_params *p; 4641da177e4SLinus Torvalds 4651da177e4SLinus Torvalds for (p = &__early_begin; p < &__early_end; p++) { 4661da177e4SLinus Torvalds int len = strlen(p->arg); 4671da177e4SLinus Torvalds 4681da177e4SLinus Torvalds if (memcmp(from, p->arg, len) == 0) { 4691da177e4SLinus Torvalds if (to != command_line) 4701da177e4SLinus Torvalds to -= 1; 4711da177e4SLinus Torvalds from += len; 4721da177e4SLinus Torvalds p->fn(&from); 4731da177e4SLinus Torvalds 4741da177e4SLinus Torvalds while (*from != ' ' && *from != '\0') 4751da177e4SLinus Torvalds from++; 4761da177e4SLinus Torvalds break; 4771da177e4SLinus Torvalds } 4781da177e4SLinus Torvalds } 4791da177e4SLinus Torvalds } 4801da177e4SLinus Torvalds c = *from++; 4811da177e4SLinus Torvalds if (!c) 4821da177e4SLinus Torvalds break; 4831da177e4SLinus Torvalds if (COMMAND_LINE_SIZE <= ++len) 4841da177e4SLinus Torvalds break; 4851da177e4SLinus Torvalds *to++ = c; 4861da177e4SLinus Torvalds } 4871da177e4SLinus Torvalds *to = '\0'; 4881da177e4SLinus Torvalds *cmdline_p = command_line; 4891da177e4SLinus Torvalds } 4901da177e4SLinus Torvalds 4911da177e4SLinus Torvalds static void __init 4921da177e4SLinus Torvalds setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz) 4931da177e4SLinus Torvalds { 4941da177e4SLinus Torvalds #ifdef CONFIG_BLK_DEV_RAM 4951da177e4SLinus Torvalds extern int rd_size, rd_image_start, rd_prompt, rd_doload; 4961da177e4SLinus Torvalds 4971da177e4SLinus Torvalds rd_image_start = image_start; 4981da177e4SLinus Torvalds rd_prompt = prompt; 4991da177e4SLinus Torvalds rd_doload = doload; 5001da177e4SLinus Torvalds 5011da177e4SLinus Torvalds if (rd_sz) 5021da177e4SLinus Torvalds rd_size = rd_sz; 5031da177e4SLinus Torvalds #endif 5041da177e4SLinus Torvalds } 5051da177e4SLinus Torvalds 5061da177e4SLinus Torvalds static void __init 5071da177e4SLinus Torvalds request_standard_resources(struct meminfo *mi, struct machine_desc *mdesc) 5081da177e4SLinus Torvalds { 5091da177e4SLinus Torvalds struct resource *res; 5101da177e4SLinus Torvalds int i; 5111da177e4SLinus Torvalds 5121da177e4SLinus Torvalds kernel_code.start = virt_to_phys(&_text); 5131da177e4SLinus Torvalds kernel_code.end = virt_to_phys(&_etext - 1); 5141da177e4SLinus Torvalds kernel_data.start = virt_to_phys(&__data_start); 5151da177e4SLinus Torvalds kernel_data.end = virt_to_phys(&_end - 1); 5161da177e4SLinus Torvalds 5171da177e4SLinus Torvalds for (i = 0; i < mi->nr_banks; i++) { 5181da177e4SLinus Torvalds unsigned long virt_start, virt_end; 5191da177e4SLinus Torvalds 5201da177e4SLinus Torvalds if (mi->bank[i].size == 0) 5211da177e4SLinus Torvalds continue; 5221da177e4SLinus Torvalds 5231da177e4SLinus Torvalds virt_start = __phys_to_virt(mi->bank[i].start); 5241da177e4SLinus Torvalds virt_end = virt_start + mi->bank[i].size - 1; 5251da177e4SLinus Torvalds 5261da177e4SLinus Torvalds res = alloc_bootmem_low(sizeof(*res)); 5271da177e4SLinus Torvalds res->name = "System RAM"; 5281da177e4SLinus Torvalds res->start = __virt_to_phys(virt_start); 5291da177e4SLinus Torvalds res->end = __virt_to_phys(virt_end); 5301da177e4SLinus Torvalds res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; 5311da177e4SLinus Torvalds 5321da177e4SLinus Torvalds request_resource(&iomem_resource, res); 5331da177e4SLinus Torvalds 5341da177e4SLinus Torvalds if (kernel_code.start >= res->start && 5351da177e4SLinus Torvalds kernel_code.end <= res->end) 5361da177e4SLinus Torvalds request_resource(res, &kernel_code); 5371da177e4SLinus Torvalds if (kernel_data.start >= res->start && 5381da177e4SLinus Torvalds kernel_data.end <= res->end) 5391da177e4SLinus Torvalds request_resource(res, &kernel_data); 5401da177e4SLinus Torvalds } 5411da177e4SLinus Torvalds 5421da177e4SLinus Torvalds if (mdesc->video_start) { 5431da177e4SLinus Torvalds video_ram.start = mdesc->video_start; 5441da177e4SLinus Torvalds video_ram.end = mdesc->video_end; 5451da177e4SLinus Torvalds request_resource(&iomem_resource, &video_ram); 5461da177e4SLinus Torvalds } 5471da177e4SLinus Torvalds 5481da177e4SLinus Torvalds /* 5491da177e4SLinus Torvalds * Some machines don't have the possibility of ever 5501da177e4SLinus Torvalds * possessing lp0, lp1 or lp2 5511da177e4SLinus Torvalds */ 5521da177e4SLinus Torvalds if (mdesc->reserve_lp0) 5531da177e4SLinus Torvalds request_resource(&ioport_resource, &lp0); 5541da177e4SLinus Torvalds if (mdesc->reserve_lp1) 5551da177e4SLinus Torvalds request_resource(&ioport_resource, &lp1); 5561da177e4SLinus Torvalds if (mdesc->reserve_lp2) 5571da177e4SLinus Torvalds request_resource(&ioport_resource, &lp2); 5581da177e4SLinus Torvalds } 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds /* 5611da177e4SLinus Torvalds * Tag parsing. 5621da177e4SLinus Torvalds * 5631da177e4SLinus Torvalds * This is the new way of passing data to the kernel at boot time. Rather 5641da177e4SLinus Torvalds * than passing a fixed inflexible structure to the kernel, we pass a list 5651da177e4SLinus Torvalds * of variable-sized tags to the kernel. The first tag must be a ATAG_CORE 5661da177e4SLinus Torvalds * tag for the list to be recognised (to distinguish the tagged list from 5671da177e4SLinus Torvalds * a param_struct). The list is terminated with a zero-length tag (this tag 5681da177e4SLinus Torvalds * is not parsed in any way). 5691da177e4SLinus Torvalds */ 5701da177e4SLinus Torvalds static int __init parse_tag_core(const struct tag *tag) 5711da177e4SLinus Torvalds { 5721da177e4SLinus Torvalds if (tag->hdr.size > 2) { 5731da177e4SLinus Torvalds if ((tag->u.core.flags & 1) == 0) 5741da177e4SLinus Torvalds root_mountflags &= ~MS_RDONLY; 5751da177e4SLinus Torvalds ROOT_DEV = old_decode_dev(tag->u.core.rootdev); 5761da177e4SLinus Torvalds } 5771da177e4SLinus Torvalds return 0; 5781da177e4SLinus Torvalds } 5791da177e4SLinus Torvalds 5801da177e4SLinus Torvalds __tagtable(ATAG_CORE, parse_tag_core); 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds static int __init parse_tag_mem32(const struct tag *tag) 5831da177e4SLinus Torvalds { 5841da177e4SLinus Torvalds if (meminfo.nr_banks >= NR_BANKS) { 5851da177e4SLinus Torvalds printk(KERN_WARNING 5861da177e4SLinus Torvalds "Ignoring memory bank 0x%08x size %dKB\n", 5871da177e4SLinus Torvalds tag->u.mem.start, tag->u.mem.size / 1024); 5881da177e4SLinus Torvalds return -EINVAL; 5891da177e4SLinus Torvalds } 5901c97b73eSAndrew Morton arm_add_memory(tag->u.mem.start, tag->u.mem.size); 5911da177e4SLinus Torvalds return 0; 5921da177e4SLinus Torvalds } 5931da177e4SLinus Torvalds 5941da177e4SLinus Torvalds __tagtable(ATAG_MEM, parse_tag_mem32); 5951da177e4SLinus Torvalds 5961da177e4SLinus Torvalds #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE) 5971da177e4SLinus Torvalds struct screen_info screen_info = { 5981da177e4SLinus Torvalds .orig_video_lines = 30, 5991da177e4SLinus Torvalds .orig_video_cols = 80, 6001da177e4SLinus Torvalds .orig_video_mode = 0, 6011da177e4SLinus Torvalds .orig_video_ega_bx = 0, 6021da177e4SLinus Torvalds .orig_video_isVGA = 1, 6031da177e4SLinus Torvalds .orig_video_points = 8 6041da177e4SLinus Torvalds }; 6051da177e4SLinus Torvalds 6061da177e4SLinus Torvalds static int __init parse_tag_videotext(const struct tag *tag) 6071da177e4SLinus Torvalds { 6081da177e4SLinus Torvalds screen_info.orig_x = tag->u.videotext.x; 6091da177e4SLinus Torvalds screen_info.orig_y = tag->u.videotext.y; 6101da177e4SLinus Torvalds screen_info.orig_video_page = tag->u.videotext.video_page; 6111da177e4SLinus Torvalds screen_info.orig_video_mode = tag->u.videotext.video_mode; 6121da177e4SLinus Torvalds screen_info.orig_video_cols = tag->u.videotext.video_cols; 6131da177e4SLinus Torvalds screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx; 6141da177e4SLinus Torvalds screen_info.orig_video_lines = tag->u.videotext.video_lines; 6151da177e4SLinus Torvalds screen_info.orig_video_isVGA = tag->u.videotext.video_isvga; 6161da177e4SLinus Torvalds screen_info.orig_video_points = tag->u.videotext.video_points; 6171da177e4SLinus Torvalds return 0; 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds __tagtable(ATAG_VIDEOTEXT, parse_tag_videotext); 6211da177e4SLinus Torvalds #endif 6221da177e4SLinus Torvalds 6231da177e4SLinus Torvalds static int __init parse_tag_ramdisk(const struct tag *tag) 6241da177e4SLinus Torvalds { 6251da177e4SLinus Torvalds setup_ramdisk((tag->u.ramdisk.flags & 1) == 0, 6261da177e4SLinus Torvalds (tag->u.ramdisk.flags & 2) == 0, 6271da177e4SLinus Torvalds tag->u.ramdisk.start, tag->u.ramdisk.size); 6281da177e4SLinus Torvalds return 0; 6291da177e4SLinus Torvalds } 6301da177e4SLinus Torvalds 6311da177e4SLinus Torvalds __tagtable(ATAG_RAMDISK, parse_tag_ramdisk); 6321da177e4SLinus Torvalds 6331da177e4SLinus Torvalds static int __init parse_tag_initrd(const struct tag *tag) 6341da177e4SLinus Torvalds { 6351da177e4SLinus Torvalds printk(KERN_WARNING "ATAG_INITRD is deprecated; " 6361da177e4SLinus Torvalds "please update your bootloader.\n"); 6371da177e4SLinus Torvalds phys_initrd_start = __virt_to_phys(tag->u.initrd.start); 6381da177e4SLinus Torvalds phys_initrd_size = tag->u.initrd.size; 6391da177e4SLinus Torvalds return 0; 6401da177e4SLinus Torvalds } 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds __tagtable(ATAG_INITRD, parse_tag_initrd); 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvalds static int __init parse_tag_initrd2(const struct tag *tag) 6451da177e4SLinus Torvalds { 6461da177e4SLinus Torvalds phys_initrd_start = tag->u.initrd.start; 6471da177e4SLinus Torvalds phys_initrd_size = tag->u.initrd.size; 6481da177e4SLinus Torvalds return 0; 6491da177e4SLinus Torvalds } 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvalds __tagtable(ATAG_INITRD2, parse_tag_initrd2); 6521da177e4SLinus Torvalds 6531da177e4SLinus Torvalds static int __init parse_tag_serialnr(const struct tag *tag) 6541da177e4SLinus Torvalds { 6551da177e4SLinus Torvalds system_serial_low = tag->u.serialnr.low; 6561da177e4SLinus Torvalds system_serial_high = tag->u.serialnr.high; 6571da177e4SLinus Torvalds return 0; 6581da177e4SLinus Torvalds } 6591da177e4SLinus Torvalds 6601da177e4SLinus Torvalds __tagtable(ATAG_SERIAL, parse_tag_serialnr); 6611da177e4SLinus Torvalds 6621da177e4SLinus Torvalds static int __init parse_tag_revision(const struct tag *tag) 6631da177e4SLinus Torvalds { 6641da177e4SLinus Torvalds system_rev = tag->u.revision.rev; 6651da177e4SLinus Torvalds return 0; 6661da177e4SLinus Torvalds } 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds __tagtable(ATAG_REVISION, parse_tag_revision); 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds static int __init parse_tag_cmdline(const struct tag *tag) 6711da177e4SLinus Torvalds { 6721da177e4SLinus Torvalds strlcpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE); 6731da177e4SLinus Torvalds return 0; 6741da177e4SLinus Torvalds } 6751da177e4SLinus Torvalds 6761da177e4SLinus Torvalds __tagtable(ATAG_CMDLINE, parse_tag_cmdline); 6771da177e4SLinus Torvalds 6781da177e4SLinus Torvalds /* 6791da177e4SLinus Torvalds * Scan the tag table for this tag, and call its parse function. 6801da177e4SLinus Torvalds * The tag table is built by the linker from all the __tagtable 6811da177e4SLinus Torvalds * declarations. 6821da177e4SLinus Torvalds */ 6831da177e4SLinus Torvalds static int __init parse_tag(const struct tag *tag) 6841da177e4SLinus Torvalds { 6851da177e4SLinus Torvalds extern struct tagtable __tagtable_begin, __tagtable_end; 6861da177e4SLinus Torvalds struct tagtable *t; 6871da177e4SLinus Torvalds 6881da177e4SLinus Torvalds for (t = &__tagtable_begin; t < &__tagtable_end; t++) 6891da177e4SLinus Torvalds if (tag->hdr.tag == t->tag) { 6901da177e4SLinus Torvalds t->parse(tag); 6911da177e4SLinus Torvalds break; 6921da177e4SLinus Torvalds } 6931da177e4SLinus Torvalds 6941da177e4SLinus Torvalds return t < &__tagtable_end; 6951da177e4SLinus Torvalds } 6961da177e4SLinus Torvalds 6971da177e4SLinus Torvalds /* 6981da177e4SLinus Torvalds * Parse all tags in the list, checking both the global and architecture 6991da177e4SLinus Torvalds * specific tag tables. 7001da177e4SLinus Torvalds */ 7011da177e4SLinus Torvalds static void __init parse_tags(const struct tag *t) 7021da177e4SLinus Torvalds { 7031da177e4SLinus Torvalds for (; t->hdr.size; t = tag_next(t)) 7041da177e4SLinus Torvalds if (!parse_tag(t)) 7051da177e4SLinus Torvalds printk(KERN_WARNING 7061da177e4SLinus Torvalds "Ignoring unrecognised tag 0x%08x\n", 7071da177e4SLinus Torvalds t->hdr.tag); 7081da177e4SLinus Torvalds } 7091da177e4SLinus Torvalds 7101da177e4SLinus Torvalds /* 7111da177e4SLinus Torvalds * This holds our defaults. 7121da177e4SLinus Torvalds */ 7131da177e4SLinus Torvalds static struct init_tags { 7141da177e4SLinus Torvalds struct tag_header hdr1; 7151da177e4SLinus Torvalds struct tag_core core; 7161da177e4SLinus Torvalds struct tag_header hdr2; 7171da177e4SLinus Torvalds struct tag_mem32 mem; 7181da177e4SLinus Torvalds struct tag_header hdr3; 7191da177e4SLinus Torvalds } init_tags __initdata = { 7201da177e4SLinus Torvalds { tag_size(tag_core), ATAG_CORE }, 7211da177e4SLinus Torvalds { 1, PAGE_SIZE, 0xff }, 7221da177e4SLinus Torvalds { tag_size(tag_mem32), ATAG_MEM }, 7231da177e4SLinus Torvalds { MEM_SIZE, PHYS_OFFSET }, 7241da177e4SLinus Torvalds { 0, ATAG_NONE } 7251da177e4SLinus Torvalds }; 7261da177e4SLinus Torvalds 7271da177e4SLinus Torvalds static void (*init_machine)(void) __initdata; 7281da177e4SLinus Torvalds 7291da177e4SLinus Torvalds static int __init customize_machine(void) 7301da177e4SLinus Torvalds { 7311da177e4SLinus Torvalds /* customizes platform devices, or adds new ones */ 7321da177e4SLinus Torvalds if (init_machine) 7331da177e4SLinus Torvalds init_machine(); 7341da177e4SLinus Torvalds return 0; 7351da177e4SLinus Torvalds } 7361da177e4SLinus Torvalds arch_initcall(customize_machine); 7371da177e4SLinus Torvalds 7381da177e4SLinus Torvalds void __init setup_arch(char **cmdline_p) 7391da177e4SLinus Torvalds { 7401da177e4SLinus Torvalds struct tag *tags = (struct tag *)&init_tags; 7411da177e4SLinus Torvalds struct machine_desc *mdesc; 7421da177e4SLinus Torvalds char *from = default_command_line; 7431da177e4SLinus Torvalds 7441da177e4SLinus Torvalds setup_processor(); 7451da177e4SLinus Torvalds mdesc = setup_machine(machine_arch_type); 7461da177e4SLinus Torvalds machine_name = mdesc->name; 7471da177e4SLinus Torvalds 7481da177e4SLinus Torvalds if (mdesc->soft_reboot) 7491da177e4SLinus Torvalds reboot_setup("s"); 7501da177e4SLinus Torvalds 751f9bd6ea4SRussell King if (mdesc->boot_params) 752f9bd6ea4SRussell King tags = phys_to_virt(mdesc->boot_params); 7531da177e4SLinus Torvalds 7541da177e4SLinus Torvalds /* 7551da177e4SLinus Torvalds * If we have the old style parameters, convert them to 7561da177e4SLinus Torvalds * a tag list. 7571da177e4SLinus Torvalds */ 7581da177e4SLinus Torvalds if (tags->hdr.tag != ATAG_CORE) 7591da177e4SLinus Torvalds convert_to_tag_list(tags); 7601da177e4SLinus Torvalds if (tags->hdr.tag != ATAG_CORE) 7611da177e4SLinus Torvalds tags = (struct tag *)&init_tags; 7621da177e4SLinus Torvalds 7631da177e4SLinus Torvalds if (mdesc->fixup) 7641da177e4SLinus Torvalds mdesc->fixup(mdesc, tags, &from, &meminfo); 7651da177e4SLinus Torvalds 7661da177e4SLinus Torvalds if (tags->hdr.tag == ATAG_CORE) { 7671da177e4SLinus Torvalds if (meminfo.nr_banks != 0) 7681da177e4SLinus Torvalds squash_mem_tags(tags); 7691da177e4SLinus Torvalds parse_tags(tags); 7701da177e4SLinus Torvalds } 7711da177e4SLinus Torvalds 7721da177e4SLinus Torvalds init_mm.start_code = (unsigned long) &_text; 7731da177e4SLinus Torvalds init_mm.end_code = (unsigned long) &_etext; 7741da177e4SLinus Torvalds init_mm.end_data = (unsigned long) &_edata; 7751da177e4SLinus Torvalds init_mm.brk = (unsigned long) &_end; 7761da177e4SLinus Torvalds 7771da177e4SLinus Torvalds memcpy(saved_command_line, from, COMMAND_LINE_SIZE); 7781da177e4SLinus Torvalds saved_command_line[COMMAND_LINE_SIZE-1] = '\0'; 7791da177e4SLinus Torvalds parse_cmdline(cmdline_p, from); 7801da177e4SLinus Torvalds paging_init(&meminfo, mdesc); 7811da177e4SLinus Torvalds request_standard_resources(&meminfo, mdesc); 7821da177e4SLinus Torvalds 7837bbb7940SRussell King #ifdef CONFIG_SMP 7847bbb7940SRussell King smp_init_cpus(); 7857bbb7940SRussell King #endif 7867bbb7940SRussell King 787ccea7a19SRussell King cpu_init(); 788ccea7a19SRussell King 7891da177e4SLinus Torvalds /* 7901da177e4SLinus Torvalds * Set up various architecture-specific pointers 7911da177e4SLinus Torvalds */ 7921da177e4SLinus Torvalds init_arch_irq = mdesc->init_irq; 7931da177e4SLinus Torvalds system_timer = mdesc->timer; 7941da177e4SLinus Torvalds init_machine = mdesc->init_machine; 7951da177e4SLinus Torvalds 7961da177e4SLinus Torvalds #ifdef CONFIG_VT 7971da177e4SLinus Torvalds #if defined(CONFIG_VGA_CONSOLE) 7981da177e4SLinus Torvalds conswitchp = &vga_con; 7991da177e4SLinus Torvalds #elif defined(CONFIG_DUMMY_CONSOLE) 8001da177e4SLinus Torvalds conswitchp = &dummy_con; 8011da177e4SLinus Torvalds #endif 8021da177e4SLinus Torvalds #endif 8031da177e4SLinus Torvalds } 8041da177e4SLinus Torvalds 8051da177e4SLinus Torvalds 8061da177e4SLinus Torvalds static int __init topology_init(void) 8071da177e4SLinus Torvalds { 8081da177e4SLinus Torvalds int cpu; 8091da177e4SLinus Torvalds 810036999d5SKAMEZAWA Hiroyuki for_each_possible_cpu(cpu) 81176b67ed9SKAMEZAWA Hiroyuki register_cpu(&per_cpu(cpu_data, cpu).cpu, cpu); 8121da177e4SLinus Torvalds 8131da177e4SLinus Torvalds return 0; 8141da177e4SLinus Torvalds } 8151da177e4SLinus Torvalds 8161da177e4SLinus Torvalds subsys_initcall(topology_init); 8171da177e4SLinus Torvalds 8181da177e4SLinus Torvalds static const char *hwcap_str[] = { 8191da177e4SLinus Torvalds "swp", 8201da177e4SLinus Torvalds "half", 8211da177e4SLinus Torvalds "thumb", 8221da177e4SLinus Torvalds "26bit", 8231da177e4SLinus Torvalds "fastmult", 8241da177e4SLinus Torvalds "fpa", 8251da177e4SLinus Torvalds "vfp", 8261da177e4SLinus Torvalds "edsp", 8271da177e4SLinus Torvalds "java", 8281da177e4SLinus Torvalds NULL 8291da177e4SLinus Torvalds }; 8301da177e4SLinus Torvalds 8311da177e4SLinus Torvalds static void 8321da177e4SLinus Torvalds c_show_cache(struct seq_file *m, const char *type, unsigned int cache) 8331da177e4SLinus Torvalds { 8341da177e4SLinus Torvalds unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0); 8351da177e4SLinus Torvalds 8361da177e4SLinus Torvalds seq_printf(m, "%s size\t\t: %d\n" 8371da177e4SLinus Torvalds "%s assoc\t\t: %d\n" 8381da177e4SLinus Torvalds "%s line length\t: %d\n" 8391da177e4SLinus Torvalds "%s sets\t\t: %d\n", 8401da177e4SLinus Torvalds type, mult << (8 + CACHE_SIZE(cache)), 8411da177e4SLinus Torvalds type, (mult << CACHE_ASSOC(cache)) >> 1, 8421da177e4SLinus Torvalds type, 8 << CACHE_LINE(cache), 8431da177e4SLinus Torvalds type, 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) - 8441da177e4SLinus Torvalds CACHE_LINE(cache))); 8451da177e4SLinus Torvalds } 8461da177e4SLinus Torvalds 8471da177e4SLinus Torvalds static int c_show(struct seq_file *m, void *v) 8481da177e4SLinus Torvalds { 8491da177e4SLinus Torvalds int i; 8501da177e4SLinus Torvalds 8511da177e4SLinus Torvalds seq_printf(m, "Processor\t: %s rev %d (%s)\n", 8521da177e4SLinus Torvalds cpu_name, (int)processor_id & 15, elf_platform); 8531da177e4SLinus Torvalds 8541da177e4SLinus Torvalds #if defined(CONFIG_SMP) 8551da177e4SLinus Torvalds for_each_online_cpu(i) { 85615559722SRussell King /* 85715559722SRussell King * glibc reads /proc/cpuinfo to determine the number of 85815559722SRussell King * online processors, looking for lines beginning with 85915559722SRussell King * "processor". Give glibc what it expects. 86015559722SRussell King */ 86115559722SRussell King seq_printf(m, "processor\t: %d\n", i); 8621da177e4SLinus Torvalds seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n", 8631da177e4SLinus Torvalds per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ), 8641da177e4SLinus Torvalds (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100); 8651da177e4SLinus Torvalds } 8661da177e4SLinus Torvalds #else /* CONFIG_SMP */ 8671da177e4SLinus Torvalds seq_printf(m, "BogoMIPS\t: %lu.%02lu\n", 8681da177e4SLinus Torvalds loops_per_jiffy / (500000/HZ), 8691da177e4SLinus Torvalds (loops_per_jiffy / (5000/HZ)) % 100); 8701da177e4SLinus Torvalds #endif 8711da177e4SLinus Torvalds 8721da177e4SLinus Torvalds /* dump out the processor features */ 8731da177e4SLinus Torvalds seq_puts(m, "Features\t: "); 8741da177e4SLinus Torvalds 8751da177e4SLinus Torvalds for (i = 0; hwcap_str[i]; i++) 8761da177e4SLinus Torvalds if (elf_hwcap & (1 << i)) 8771da177e4SLinus Torvalds seq_printf(m, "%s ", hwcap_str[i]); 8781da177e4SLinus Torvalds 8791da177e4SLinus Torvalds seq_printf(m, "\nCPU implementer\t: 0x%02x\n", processor_id >> 24); 8801da177e4SLinus Torvalds seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]); 8811da177e4SLinus Torvalds 8826b090a25SCatalin Marinas if ((processor_id & 0x0008f000) == 0x00000000) { 8831da177e4SLinus Torvalds /* pre-ARM7 */ 8841da177e4SLinus Torvalds seq_printf(m, "CPU part\t\t: %07x\n", processor_id >> 4); 8851da177e4SLinus Torvalds } else { 8866b090a25SCatalin Marinas if ((processor_id & 0x0008f000) == 0x00007000) { 8871da177e4SLinus Torvalds /* ARM7 */ 8881da177e4SLinus Torvalds seq_printf(m, "CPU variant\t: 0x%02x\n", 8891da177e4SLinus Torvalds (processor_id >> 16) & 127); 8901da177e4SLinus Torvalds } else { 8911da177e4SLinus Torvalds /* post-ARM7 */ 8921da177e4SLinus Torvalds seq_printf(m, "CPU variant\t: 0x%x\n", 8931da177e4SLinus Torvalds (processor_id >> 20) & 15); 8941da177e4SLinus Torvalds } 8951da177e4SLinus Torvalds seq_printf(m, "CPU part\t: 0x%03x\n", 8961da177e4SLinus Torvalds (processor_id >> 4) & 0xfff); 8971da177e4SLinus Torvalds } 8981da177e4SLinus Torvalds seq_printf(m, "CPU revision\t: %d\n", processor_id & 15); 8991da177e4SLinus Torvalds 9001da177e4SLinus Torvalds { 9011da177e4SLinus Torvalds unsigned int cache_info = read_cpuid(CPUID_CACHETYPE); 9021da177e4SLinus Torvalds if (cache_info != processor_id) { 9031da177e4SLinus Torvalds seq_printf(m, "Cache type\t: %s\n" 9041da177e4SLinus Torvalds "Cache clean\t: %s\n" 9051da177e4SLinus Torvalds "Cache lockdown\t: %s\n" 9061da177e4SLinus Torvalds "Cache format\t: %s\n", 9071da177e4SLinus Torvalds cache_types[CACHE_TYPE(cache_info)], 9081da177e4SLinus Torvalds cache_clean[CACHE_TYPE(cache_info)], 9091da177e4SLinus Torvalds cache_lockdown[CACHE_TYPE(cache_info)], 9101da177e4SLinus Torvalds CACHE_S(cache_info) ? "Harvard" : "Unified"); 9111da177e4SLinus Torvalds 9121da177e4SLinus Torvalds if (CACHE_S(cache_info)) { 9131da177e4SLinus Torvalds c_show_cache(m, "I", CACHE_ISIZE(cache_info)); 9141da177e4SLinus Torvalds c_show_cache(m, "D", CACHE_DSIZE(cache_info)); 9151da177e4SLinus Torvalds } else { 9161da177e4SLinus Torvalds c_show_cache(m, "Cache", CACHE_ISIZE(cache_info)); 9171da177e4SLinus Torvalds } 9181da177e4SLinus Torvalds } 9191da177e4SLinus Torvalds } 9201da177e4SLinus Torvalds 9211da177e4SLinus Torvalds seq_puts(m, "\n"); 9221da177e4SLinus Torvalds 9231da177e4SLinus Torvalds seq_printf(m, "Hardware\t: %s\n", machine_name); 9241da177e4SLinus Torvalds seq_printf(m, "Revision\t: %04x\n", system_rev); 9251da177e4SLinus Torvalds seq_printf(m, "Serial\t\t: %08x%08x\n", 9261da177e4SLinus Torvalds system_serial_high, system_serial_low); 9271da177e4SLinus Torvalds 9281da177e4SLinus Torvalds return 0; 9291da177e4SLinus Torvalds } 9301da177e4SLinus Torvalds 9311da177e4SLinus Torvalds static void *c_start(struct seq_file *m, loff_t *pos) 9321da177e4SLinus Torvalds { 9331da177e4SLinus Torvalds return *pos < 1 ? (void *)1 : NULL; 9341da177e4SLinus Torvalds } 9351da177e4SLinus Torvalds 9361da177e4SLinus Torvalds static void *c_next(struct seq_file *m, void *v, loff_t *pos) 9371da177e4SLinus Torvalds { 9381da177e4SLinus Torvalds ++*pos; 9391da177e4SLinus Torvalds return NULL; 9401da177e4SLinus Torvalds } 9411da177e4SLinus Torvalds 9421da177e4SLinus Torvalds static void c_stop(struct seq_file *m, void *v) 9431da177e4SLinus Torvalds { 9441da177e4SLinus Torvalds } 9451da177e4SLinus Torvalds 9461da177e4SLinus Torvalds struct seq_operations cpuinfo_op = { 9471da177e4SLinus Torvalds .start = c_start, 9481da177e4SLinus Torvalds .next = c_next, 9491da177e4SLinus Torvalds .stop = c_stop, 9501da177e4SLinus Torvalds .show = c_show 9511da177e4SLinus Torvalds }; 952