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> 261da177e4SLinus Torvalds 271da177e4SLinus Torvalds #include <asm/cpu.h> 281da177e4SLinus Torvalds #include <asm/elf.h> 291da177e4SLinus Torvalds #include <asm/hardware.h> 301da177e4SLinus Torvalds #include <asm/io.h> 311da177e4SLinus Torvalds #include <asm/procinfo.h> 321da177e4SLinus Torvalds #include <asm/setup.h> 331da177e4SLinus Torvalds #include <asm/mach-types.h> 341da177e4SLinus Torvalds #include <asm/cacheflush.h> 351da177e4SLinus Torvalds #include <asm/tlbflush.h> 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds #include <asm/mach/arch.h> 381da177e4SLinus Torvalds #include <asm/mach/irq.h> 391da177e4SLinus Torvalds #include <asm/mach/time.h> 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds #ifndef MEM_SIZE 421da177e4SLinus Torvalds #define MEM_SIZE (16*1024*1024) 431da177e4SLinus Torvalds #endif 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds #if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE) 461da177e4SLinus Torvalds char fpe_type[8]; 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds static int __init fpe_setup(char *line) 491da177e4SLinus Torvalds { 501da177e4SLinus Torvalds memcpy(fpe_type, line, 8); 511da177e4SLinus Torvalds return 1; 521da177e4SLinus Torvalds } 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds __setup("fpe=", fpe_setup); 551da177e4SLinus Torvalds #endif 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds extern unsigned int mem_fclk_21285; 581da177e4SLinus Torvalds extern void paging_init(struct meminfo *, struct machine_desc *desc); 591da177e4SLinus Torvalds extern void convert_to_tag_list(struct tag *tags); 601da177e4SLinus Torvalds extern void squash_mem_tags(struct tag *tag); 611da177e4SLinus Torvalds extern void reboot_setup(char *str); 621da177e4SLinus Torvalds extern int root_mountflags; 631da177e4SLinus Torvalds extern void _stext, _text, _etext, __data_start, _edata, _end; 641da177e4SLinus Torvalds 651da177e4SLinus Torvalds unsigned int processor_id; 661da177e4SLinus Torvalds unsigned int __machine_arch_type; 671da177e4SLinus Torvalds EXPORT_SYMBOL(__machine_arch_type); 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds unsigned int system_rev; 701da177e4SLinus Torvalds EXPORT_SYMBOL(system_rev); 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds unsigned int system_serial_low; 731da177e4SLinus Torvalds EXPORT_SYMBOL(system_serial_low); 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds unsigned int system_serial_high; 761da177e4SLinus Torvalds EXPORT_SYMBOL(system_serial_high); 771da177e4SLinus Torvalds 781da177e4SLinus Torvalds unsigned int elf_hwcap; 791da177e4SLinus Torvalds EXPORT_SYMBOL(elf_hwcap); 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds #ifdef MULTI_CPU 831da177e4SLinus Torvalds struct processor processor; 841da177e4SLinus Torvalds #endif 851da177e4SLinus Torvalds #ifdef MULTI_TLB 861da177e4SLinus Torvalds struct cpu_tlb_fns cpu_tlb; 871da177e4SLinus Torvalds #endif 881da177e4SLinus Torvalds #ifdef MULTI_USER 891da177e4SLinus Torvalds struct cpu_user_fns cpu_user; 901da177e4SLinus Torvalds #endif 911da177e4SLinus Torvalds #ifdef MULTI_CACHE 921da177e4SLinus Torvalds struct cpu_cache_fns cpu_cache; 931da177e4SLinus Torvalds #endif 941da177e4SLinus Torvalds 95ccea7a19SRussell King struct stack { 96ccea7a19SRussell King u32 irq[3]; 97ccea7a19SRussell King u32 abt[3]; 98ccea7a19SRussell King u32 und[3]; 99ccea7a19SRussell King } ____cacheline_aligned; 100ccea7a19SRussell King 101ccea7a19SRussell King static struct stack stacks[NR_CPUS]; 102ccea7a19SRussell King 1031da177e4SLinus Torvalds char elf_platform[ELF_PLATFORM_SIZE]; 1041da177e4SLinus Torvalds EXPORT_SYMBOL(elf_platform); 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds unsigned long phys_initrd_start __initdata = 0; 1071da177e4SLinus Torvalds unsigned long phys_initrd_size __initdata = 0; 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds static struct meminfo meminfo __initdata = { 0, }; 1101da177e4SLinus Torvalds static const char *cpu_name; 1111da177e4SLinus Torvalds static const char *machine_name; 1121da177e4SLinus Torvalds static char command_line[COMMAND_LINE_SIZE]; 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE; 1151da177e4SLinus Torvalds static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } }; 1161da177e4SLinus Torvalds #define ENDIANNESS ((char)endian_test.l) 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds DEFINE_PER_CPU(struct cpuinfo_arm, cpu_data); 1191da177e4SLinus Torvalds 1201da177e4SLinus Torvalds /* 1211da177e4SLinus Torvalds * Standard memory resources 1221da177e4SLinus Torvalds */ 1231da177e4SLinus Torvalds static struct resource mem_res[] = { 1241da177e4SLinus Torvalds { "Video RAM", 0, 0, IORESOURCE_MEM }, 1251da177e4SLinus Torvalds { "Kernel text", 0, 0, IORESOURCE_MEM }, 1261da177e4SLinus Torvalds { "Kernel data", 0, 0, IORESOURCE_MEM } 1271da177e4SLinus Torvalds }; 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds #define video_ram mem_res[0] 1301da177e4SLinus Torvalds #define kernel_code mem_res[1] 1311da177e4SLinus Torvalds #define kernel_data mem_res[2] 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds static struct resource io_res[] = { 1341da177e4SLinus Torvalds { "reserved", 0x3bc, 0x3be, IORESOURCE_IO | IORESOURCE_BUSY }, 1351da177e4SLinus Torvalds { "reserved", 0x378, 0x37f, IORESOURCE_IO | IORESOURCE_BUSY }, 1361da177e4SLinus Torvalds { "reserved", 0x278, 0x27f, IORESOURCE_IO | IORESOURCE_BUSY } 1371da177e4SLinus Torvalds }; 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds #define lp0 io_res[0] 1401da177e4SLinus Torvalds #define lp1 io_res[1] 1411da177e4SLinus Torvalds #define lp2 io_res[2] 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds static const char *cache_types[16] = { 1441da177e4SLinus Torvalds "write-through", 1451da177e4SLinus Torvalds "write-back", 1461da177e4SLinus Torvalds "write-back", 1471da177e4SLinus Torvalds "undefined 3", 1481da177e4SLinus Torvalds "undefined 4", 1491da177e4SLinus Torvalds "undefined 5", 1501da177e4SLinus Torvalds "write-back", 1511da177e4SLinus Torvalds "write-back", 1521da177e4SLinus Torvalds "undefined 8", 1531da177e4SLinus Torvalds "undefined 9", 1541da177e4SLinus Torvalds "undefined 10", 1551da177e4SLinus Torvalds "undefined 11", 1561da177e4SLinus Torvalds "undefined 12", 1571da177e4SLinus Torvalds "undefined 13", 1581da177e4SLinus Torvalds "write-back", 1591da177e4SLinus Torvalds "undefined 15", 1601da177e4SLinus Torvalds }; 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds static const char *cache_clean[16] = { 1631da177e4SLinus Torvalds "not required", 1641da177e4SLinus Torvalds "read-block", 1651da177e4SLinus Torvalds "cp15 c7 ops", 1661da177e4SLinus Torvalds "undefined 3", 1671da177e4SLinus Torvalds "undefined 4", 1681da177e4SLinus Torvalds "undefined 5", 1691da177e4SLinus Torvalds "cp15 c7 ops", 1701da177e4SLinus Torvalds "cp15 c7 ops", 1711da177e4SLinus Torvalds "undefined 8", 1721da177e4SLinus Torvalds "undefined 9", 1731da177e4SLinus Torvalds "undefined 10", 1741da177e4SLinus Torvalds "undefined 11", 1751da177e4SLinus Torvalds "undefined 12", 1761da177e4SLinus Torvalds "undefined 13", 1771da177e4SLinus Torvalds "cp15 c7 ops", 1781da177e4SLinus Torvalds "undefined 15", 1791da177e4SLinus Torvalds }; 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds static const char *cache_lockdown[16] = { 1821da177e4SLinus Torvalds "not supported", 1831da177e4SLinus Torvalds "not supported", 1841da177e4SLinus Torvalds "not supported", 1851da177e4SLinus Torvalds "undefined 3", 1861da177e4SLinus Torvalds "undefined 4", 1871da177e4SLinus Torvalds "undefined 5", 1881da177e4SLinus Torvalds "format A", 1891da177e4SLinus Torvalds "format B", 1901da177e4SLinus Torvalds "undefined 8", 1911da177e4SLinus Torvalds "undefined 9", 1921da177e4SLinus Torvalds "undefined 10", 1931da177e4SLinus Torvalds "undefined 11", 1941da177e4SLinus Torvalds "undefined 12", 1951da177e4SLinus Torvalds "undefined 13", 1961da177e4SLinus Torvalds "format C", 1971da177e4SLinus Torvalds "undefined 15", 1981da177e4SLinus Torvalds }; 1991da177e4SLinus Torvalds 2001da177e4SLinus Torvalds static const char *proc_arch[] = { 2011da177e4SLinus Torvalds "undefined/unknown", 2021da177e4SLinus Torvalds "3", 2031da177e4SLinus Torvalds "4", 2041da177e4SLinus Torvalds "4T", 2051da177e4SLinus Torvalds "5", 2061da177e4SLinus Torvalds "5T", 2071da177e4SLinus Torvalds "5TE", 2081da177e4SLinus Torvalds "5TEJ", 2091da177e4SLinus Torvalds "6TEJ", 2101da177e4SLinus Torvalds "?(10)", 2111da177e4SLinus Torvalds "?(11)", 2121da177e4SLinus Torvalds "?(12)", 2131da177e4SLinus Torvalds "?(13)", 2141da177e4SLinus Torvalds "?(14)", 2151da177e4SLinus Torvalds "?(15)", 2161da177e4SLinus Torvalds "?(16)", 2171da177e4SLinus Torvalds "?(17)", 2181da177e4SLinus Torvalds }; 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds #define CACHE_TYPE(x) (((x) >> 25) & 15) 2211da177e4SLinus Torvalds #define CACHE_S(x) ((x) & (1 << 24)) 2221da177e4SLinus Torvalds #define CACHE_DSIZE(x) (((x) >> 12) & 4095) /* only if S=1 */ 2231da177e4SLinus Torvalds #define CACHE_ISIZE(x) ((x) & 4095) 2241da177e4SLinus Torvalds 2251da177e4SLinus Torvalds #define CACHE_SIZE(y) (((y) >> 6) & 7) 2261da177e4SLinus Torvalds #define CACHE_ASSOC(y) (((y) >> 3) & 7) 2271da177e4SLinus Torvalds #define CACHE_M(y) ((y) & (1 << 2)) 2281da177e4SLinus Torvalds #define CACHE_LINE(y) ((y) & 3) 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds static inline void dump_cache(const char *prefix, int cpu, unsigned int cache) 2311da177e4SLinus Torvalds { 2321da177e4SLinus Torvalds unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0); 2331da177e4SLinus Torvalds 2341da177e4SLinus Torvalds printk("CPU%u: %s: %d bytes, associativity %d, %d byte lines, %d sets\n", 2351da177e4SLinus Torvalds cpu, prefix, 2361da177e4SLinus Torvalds mult << (8 + CACHE_SIZE(cache)), 2371da177e4SLinus Torvalds (mult << CACHE_ASSOC(cache)) >> 1, 2381da177e4SLinus Torvalds 8 << CACHE_LINE(cache), 2391da177e4SLinus Torvalds 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) - 2401da177e4SLinus Torvalds CACHE_LINE(cache))); 2411da177e4SLinus Torvalds } 2421da177e4SLinus Torvalds 2431da177e4SLinus Torvalds static void __init dump_cpu_info(int cpu) 2441da177e4SLinus Torvalds { 2451da177e4SLinus Torvalds unsigned int info = read_cpuid(CPUID_CACHETYPE); 2461da177e4SLinus Torvalds 2471da177e4SLinus Torvalds if (info != processor_id) { 2481da177e4SLinus Torvalds printk("CPU%u: D %s %s cache\n", cpu, cache_is_vivt() ? "VIVT" : "VIPT", 2491da177e4SLinus Torvalds cache_types[CACHE_TYPE(info)]); 2501da177e4SLinus Torvalds if (CACHE_S(info)) { 2511da177e4SLinus Torvalds dump_cache("I cache", cpu, CACHE_ISIZE(info)); 2521da177e4SLinus Torvalds dump_cache("D cache", cpu, CACHE_DSIZE(info)); 2531da177e4SLinus Torvalds } else { 2541da177e4SLinus Torvalds dump_cache("cache", cpu, CACHE_ISIZE(info)); 2551da177e4SLinus Torvalds } 2561da177e4SLinus Torvalds } 2571da177e4SLinus Torvalds } 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvalds int cpu_architecture(void) 2601da177e4SLinus Torvalds { 2611da177e4SLinus Torvalds int cpu_arch; 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds if ((processor_id & 0x0000f000) == 0) { 2641da177e4SLinus Torvalds cpu_arch = CPU_ARCH_UNKNOWN; 2651da177e4SLinus Torvalds } else if ((processor_id & 0x0000f000) == 0x00007000) { 2661da177e4SLinus Torvalds cpu_arch = (processor_id & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3; 2671da177e4SLinus Torvalds } else { 2681da177e4SLinus Torvalds cpu_arch = (processor_id >> 16) & 7; 2691da177e4SLinus Torvalds if (cpu_arch) 2701da177e4SLinus Torvalds cpu_arch += CPU_ARCH_ARMv3; 2711da177e4SLinus Torvalds } 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds return cpu_arch; 2741da177e4SLinus Torvalds } 2751da177e4SLinus Torvalds 2761da177e4SLinus Torvalds /* 2771da177e4SLinus Torvalds * These functions re-use the assembly code in head.S, which 2781da177e4SLinus Torvalds * already provide the required functionality. 2791da177e4SLinus Torvalds */ 2801da177e4SLinus Torvalds extern struct proc_info_list *lookup_processor_type(void); 2811da177e4SLinus Torvalds extern struct machine_desc *lookup_machine_type(unsigned int); 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds static void __init setup_processor(void) 2841da177e4SLinus Torvalds { 2851da177e4SLinus Torvalds struct proc_info_list *list; 2861da177e4SLinus Torvalds 2871da177e4SLinus Torvalds /* 2881da177e4SLinus Torvalds * locate processor in the list of supported processor 2891da177e4SLinus Torvalds * types. The linker builds this table for us from the 2901da177e4SLinus Torvalds * entries in arch/arm/mm/proc-*.S 2911da177e4SLinus Torvalds */ 2921da177e4SLinus Torvalds list = lookup_processor_type(); 2931da177e4SLinus Torvalds if (!list) { 2941da177e4SLinus Torvalds printk("CPU configuration botched (ID %08x), unable " 2951da177e4SLinus Torvalds "to continue.\n", processor_id); 2961da177e4SLinus Torvalds while (1); 2971da177e4SLinus Torvalds } 2981da177e4SLinus Torvalds 2991da177e4SLinus Torvalds cpu_name = list->cpu_name; 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds #ifdef MULTI_CPU 3021da177e4SLinus Torvalds processor = *list->proc; 3031da177e4SLinus Torvalds #endif 3041da177e4SLinus Torvalds #ifdef MULTI_TLB 3051da177e4SLinus Torvalds cpu_tlb = *list->tlb; 3061da177e4SLinus Torvalds #endif 3071da177e4SLinus Torvalds #ifdef MULTI_USER 3081da177e4SLinus Torvalds cpu_user = *list->user; 3091da177e4SLinus Torvalds #endif 3101da177e4SLinus Torvalds #ifdef MULTI_CACHE 3111da177e4SLinus Torvalds cpu_cache = *list->cache; 3121da177e4SLinus Torvalds #endif 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds printk("CPU: %s [%08x] revision %d (ARMv%s)\n", 3151da177e4SLinus Torvalds cpu_name, processor_id, (int)processor_id & 15, 3161da177e4SLinus Torvalds proc_arch[cpu_architecture()]); 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds sprintf(system_utsname.machine, "%s%c", list->arch_name, ENDIANNESS); 3191da177e4SLinus Torvalds sprintf(elf_platform, "%s%c", list->elf_name, ENDIANNESS); 3201da177e4SLinus Torvalds elf_hwcap = list->elf_hwcap; 3211da177e4SLinus Torvalds 3221da177e4SLinus Torvalds cpu_proc_init(); 3231da177e4SLinus Torvalds } 3241da177e4SLinus Torvalds 325ccea7a19SRussell King /* 326ccea7a19SRussell King * cpu_init - initialise one CPU. 327ccea7a19SRussell King * 328ccea7a19SRussell King * cpu_init dumps the cache information, initialises SMP specific 329ccea7a19SRussell King * information, and sets up the per-CPU stacks. 330ccea7a19SRussell King */ 33136c5ed23SRussell King void cpu_init(void) 332ccea7a19SRussell King { 333ccea7a19SRussell King unsigned int cpu = smp_processor_id(); 334ccea7a19SRussell King struct stack *stk = &stacks[cpu]; 335ccea7a19SRussell King 336ccea7a19SRussell King if (cpu >= NR_CPUS) { 337ccea7a19SRussell King printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu); 338ccea7a19SRussell King BUG(); 339ccea7a19SRussell King } 340ccea7a19SRussell King 341ccea7a19SRussell King dump_cpu_info(cpu); 342ccea7a19SRussell King 343ccea7a19SRussell King /* 344ccea7a19SRussell King * setup stacks for re-entrant exception handlers 345ccea7a19SRussell King */ 346ccea7a19SRussell King __asm__ ( 347ccea7a19SRussell King "msr cpsr_c, %1\n\t" 348ccea7a19SRussell King "add sp, %0, %2\n\t" 349ccea7a19SRussell King "msr cpsr_c, %3\n\t" 350ccea7a19SRussell King "add sp, %0, %4\n\t" 351ccea7a19SRussell King "msr cpsr_c, %5\n\t" 352ccea7a19SRussell King "add sp, %0, %6\n\t" 353ccea7a19SRussell King "msr cpsr_c, %7" 354ccea7a19SRussell King : 355ccea7a19SRussell King : "r" (stk), 356ccea7a19SRussell King "I" (PSR_F_BIT | PSR_I_BIT | IRQ_MODE), 357ccea7a19SRussell King "I" (offsetof(struct stack, irq[0])), 358ccea7a19SRussell King "I" (PSR_F_BIT | PSR_I_BIT | ABT_MODE), 359ccea7a19SRussell King "I" (offsetof(struct stack, abt[0])), 360ccea7a19SRussell King "I" (PSR_F_BIT | PSR_I_BIT | UND_MODE), 361ccea7a19SRussell King "I" (offsetof(struct stack, und[0])), 362aaaa3f9eSCatalin Marinas "I" (PSR_F_BIT | PSR_I_BIT | SVC_MODE) 363aaaa3f9eSCatalin Marinas : "r14"); 364ccea7a19SRussell King } 365ccea7a19SRussell King 3661da177e4SLinus Torvalds static struct machine_desc * __init setup_machine(unsigned int nr) 3671da177e4SLinus Torvalds { 3681da177e4SLinus Torvalds struct machine_desc *list; 3691da177e4SLinus Torvalds 3701da177e4SLinus Torvalds /* 3711da177e4SLinus Torvalds * locate machine in the list of supported machines. 3721da177e4SLinus Torvalds */ 3731da177e4SLinus Torvalds list = lookup_machine_type(nr); 3741da177e4SLinus Torvalds if (!list) { 3751da177e4SLinus Torvalds printk("Machine configuration botched (nr %d), unable " 3761da177e4SLinus Torvalds "to continue.\n", nr); 3771da177e4SLinus Torvalds while (1); 3781da177e4SLinus Torvalds } 3791da177e4SLinus Torvalds 3801da177e4SLinus Torvalds printk("Machine: %s\n", list->name); 3811da177e4SLinus Torvalds 3821da177e4SLinus Torvalds return list; 3831da177e4SLinus Torvalds } 3841da177e4SLinus Torvalds 3851da177e4SLinus Torvalds static void __init early_initrd(char **p) 3861da177e4SLinus Torvalds { 3871da177e4SLinus Torvalds unsigned long start, size; 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds start = memparse(*p, p); 3901da177e4SLinus Torvalds if (**p == ',') { 3911da177e4SLinus Torvalds size = memparse((*p) + 1, p); 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds phys_initrd_start = start; 3941da177e4SLinus Torvalds phys_initrd_size = size; 3951da177e4SLinus Torvalds } 3961da177e4SLinus Torvalds } 3971da177e4SLinus Torvalds __early_param("initrd=", early_initrd); 3981da177e4SLinus Torvalds 3993a669411SRussell King static void __init add_memory(unsigned long start, unsigned long size) 4003a669411SRussell King { 4013a669411SRussell King /* 4023a669411SRussell King * Ensure that start/size are aligned to a page boundary. 4033a669411SRussell King * Size is appropriately rounded down, start is rounded up. 4043a669411SRussell King */ 4053a669411SRussell King size -= start & ~PAGE_MASK; 4063a669411SRussell King 4073a669411SRussell King meminfo.bank[meminfo.nr_banks].start = PAGE_ALIGN(start); 4083a669411SRussell King meminfo.bank[meminfo.nr_banks].size = size & PAGE_MASK; 4093a669411SRussell King meminfo.bank[meminfo.nr_banks].node = PHYS_TO_NID(start); 4103a669411SRussell King meminfo.nr_banks += 1; 4113a669411SRussell King } 4123a669411SRussell King 4131da177e4SLinus Torvalds /* 4141da177e4SLinus Torvalds * Pick out the memory size. We look for mem=size@start, 4151da177e4SLinus Torvalds * where start and size are "size[KkMm]" 4161da177e4SLinus Torvalds */ 4171da177e4SLinus Torvalds static void __init early_mem(char **p) 4181da177e4SLinus Torvalds { 4191da177e4SLinus Torvalds static int usermem __initdata = 0; 4201da177e4SLinus Torvalds unsigned long size, start; 4211da177e4SLinus Torvalds 4221da177e4SLinus Torvalds /* 4231da177e4SLinus Torvalds * If the user specifies memory size, we 4241da177e4SLinus Torvalds * blow away any automatically generated 4251da177e4SLinus Torvalds * size. 4261da177e4SLinus Torvalds */ 4271da177e4SLinus Torvalds if (usermem == 0) { 4281da177e4SLinus Torvalds usermem = 1; 4291da177e4SLinus Torvalds meminfo.nr_banks = 0; 4301da177e4SLinus Torvalds } 4311da177e4SLinus Torvalds 4321da177e4SLinus Torvalds start = PHYS_OFFSET; 4331da177e4SLinus Torvalds size = memparse(*p, p); 4341da177e4SLinus Torvalds if (**p == '@') 4351da177e4SLinus Torvalds start = memparse(*p + 1, p); 4361da177e4SLinus Torvalds 4373a669411SRussell King add_memory(start, size); 4381da177e4SLinus Torvalds } 4391da177e4SLinus Torvalds __early_param("mem=", early_mem); 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds /* 4421da177e4SLinus Torvalds * Initial parsing of the command line. 4431da177e4SLinus Torvalds */ 4441da177e4SLinus Torvalds static void __init parse_cmdline(char **cmdline_p, char *from) 4451da177e4SLinus Torvalds { 4461da177e4SLinus Torvalds char c = ' ', *to = command_line; 4471da177e4SLinus Torvalds int len = 0; 4481da177e4SLinus Torvalds 4491da177e4SLinus Torvalds for (;;) { 4501da177e4SLinus Torvalds if (c == ' ') { 4511da177e4SLinus Torvalds extern struct early_params __early_begin, __early_end; 4521da177e4SLinus Torvalds struct early_params *p; 4531da177e4SLinus Torvalds 4541da177e4SLinus Torvalds for (p = &__early_begin; p < &__early_end; p++) { 4551da177e4SLinus Torvalds int len = strlen(p->arg); 4561da177e4SLinus Torvalds 4571da177e4SLinus Torvalds if (memcmp(from, p->arg, len) == 0) { 4581da177e4SLinus Torvalds if (to != command_line) 4591da177e4SLinus Torvalds to -= 1; 4601da177e4SLinus Torvalds from += len; 4611da177e4SLinus Torvalds p->fn(&from); 4621da177e4SLinus Torvalds 4631da177e4SLinus Torvalds while (*from != ' ' && *from != '\0') 4641da177e4SLinus Torvalds from++; 4651da177e4SLinus Torvalds break; 4661da177e4SLinus Torvalds } 4671da177e4SLinus Torvalds } 4681da177e4SLinus Torvalds } 4691da177e4SLinus Torvalds c = *from++; 4701da177e4SLinus Torvalds if (!c) 4711da177e4SLinus Torvalds break; 4721da177e4SLinus Torvalds if (COMMAND_LINE_SIZE <= ++len) 4731da177e4SLinus Torvalds break; 4741da177e4SLinus Torvalds *to++ = c; 4751da177e4SLinus Torvalds } 4761da177e4SLinus Torvalds *to = '\0'; 4771da177e4SLinus Torvalds *cmdline_p = command_line; 4781da177e4SLinus Torvalds } 4791da177e4SLinus Torvalds 4801da177e4SLinus Torvalds static void __init 4811da177e4SLinus Torvalds setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz) 4821da177e4SLinus Torvalds { 4831da177e4SLinus Torvalds #ifdef CONFIG_BLK_DEV_RAM 4841da177e4SLinus Torvalds extern int rd_size, rd_image_start, rd_prompt, rd_doload; 4851da177e4SLinus Torvalds 4861da177e4SLinus Torvalds rd_image_start = image_start; 4871da177e4SLinus Torvalds rd_prompt = prompt; 4881da177e4SLinus Torvalds rd_doload = doload; 4891da177e4SLinus Torvalds 4901da177e4SLinus Torvalds if (rd_sz) 4911da177e4SLinus Torvalds rd_size = rd_sz; 4921da177e4SLinus Torvalds #endif 4931da177e4SLinus Torvalds } 4941da177e4SLinus Torvalds 4951da177e4SLinus Torvalds static void __init 4961da177e4SLinus Torvalds request_standard_resources(struct meminfo *mi, struct machine_desc *mdesc) 4971da177e4SLinus Torvalds { 4981da177e4SLinus Torvalds struct resource *res; 4991da177e4SLinus Torvalds int i; 5001da177e4SLinus Torvalds 5011da177e4SLinus Torvalds kernel_code.start = virt_to_phys(&_text); 5021da177e4SLinus Torvalds kernel_code.end = virt_to_phys(&_etext - 1); 5031da177e4SLinus Torvalds kernel_data.start = virt_to_phys(&__data_start); 5041da177e4SLinus Torvalds kernel_data.end = virt_to_phys(&_end - 1); 5051da177e4SLinus Torvalds 5061da177e4SLinus Torvalds for (i = 0; i < mi->nr_banks; i++) { 5071da177e4SLinus Torvalds unsigned long virt_start, virt_end; 5081da177e4SLinus Torvalds 5091da177e4SLinus Torvalds if (mi->bank[i].size == 0) 5101da177e4SLinus Torvalds continue; 5111da177e4SLinus Torvalds 5121da177e4SLinus Torvalds virt_start = __phys_to_virt(mi->bank[i].start); 5131da177e4SLinus Torvalds virt_end = virt_start + mi->bank[i].size - 1; 5141da177e4SLinus Torvalds 5151da177e4SLinus Torvalds res = alloc_bootmem_low(sizeof(*res)); 5161da177e4SLinus Torvalds res->name = "System RAM"; 5171da177e4SLinus Torvalds res->start = __virt_to_phys(virt_start); 5181da177e4SLinus Torvalds res->end = __virt_to_phys(virt_end); 5191da177e4SLinus Torvalds res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; 5201da177e4SLinus Torvalds 5211da177e4SLinus Torvalds request_resource(&iomem_resource, res); 5221da177e4SLinus Torvalds 5231da177e4SLinus Torvalds if (kernel_code.start >= res->start && 5241da177e4SLinus Torvalds kernel_code.end <= res->end) 5251da177e4SLinus Torvalds request_resource(res, &kernel_code); 5261da177e4SLinus Torvalds if (kernel_data.start >= res->start && 5271da177e4SLinus Torvalds kernel_data.end <= res->end) 5281da177e4SLinus Torvalds request_resource(res, &kernel_data); 5291da177e4SLinus Torvalds } 5301da177e4SLinus Torvalds 5311da177e4SLinus Torvalds if (mdesc->video_start) { 5321da177e4SLinus Torvalds video_ram.start = mdesc->video_start; 5331da177e4SLinus Torvalds video_ram.end = mdesc->video_end; 5341da177e4SLinus Torvalds request_resource(&iomem_resource, &video_ram); 5351da177e4SLinus Torvalds } 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds /* 5381da177e4SLinus Torvalds * Some machines don't have the possibility of ever 5391da177e4SLinus Torvalds * possessing lp0, lp1 or lp2 5401da177e4SLinus Torvalds */ 5411da177e4SLinus Torvalds if (mdesc->reserve_lp0) 5421da177e4SLinus Torvalds request_resource(&ioport_resource, &lp0); 5431da177e4SLinus Torvalds if (mdesc->reserve_lp1) 5441da177e4SLinus Torvalds request_resource(&ioport_resource, &lp1); 5451da177e4SLinus Torvalds if (mdesc->reserve_lp2) 5461da177e4SLinus Torvalds request_resource(&ioport_resource, &lp2); 5471da177e4SLinus Torvalds } 5481da177e4SLinus Torvalds 5491da177e4SLinus Torvalds /* 5501da177e4SLinus Torvalds * Tag parsing. 5511da177e4SLinus Torvalds * 5521da177e4SLinus Torvalds * This is the new way of passing data to the kernel at boot time. Rather 5531da177e4SLinus Torvalds * than passing a fixed inflexible structure to the kernel, we pass a list 5541da177e4SLinus Torvalds * of variable-sized tags to the kernel. The first tag must be a ATAG_CORE 5551da177e4SLinus Torvalds * tag for the list to be recognised (to distinguish the tagged list from 5561da177e4SLinus Torvalds * a param_struct). The list is terminated with a zero-length tag (this tag 5571da177e4SLinus Torvalds * is not parsed in any way). 5581da177e4SLinus Torvalds */ 5591da177e4SLinus Torvalds static int __init parse_tag_core(const struct tag *tag) 5601da177e4SLinus Torvalds { 5611da177e4SLinus Torvalds if (tag->hdr.size > 2) { 5621da177e4SLinus Torvalds if ((tag->u.core.flags & 1) == 0) 5631da177e4SLinus Torvalds root_mountflags &= ~MS_RDONLY; 5641da177e4SLinus Torvalds ROOT_DEV = old_decode_dev(tag->u.core.rootdev); 5651da177e4SLinus Torvalds } 5661da177e4SLinus Torvalds return 0; 5671da177e4SLinus Torvalds } 5681da177e4SLinus Torvalds 5691da177e4SLinus Torvalds __tagtable(ATAG_CORE, parse_tag_core); 5701da177e4SLinus Torvalds 5711da177e4SLinus Torvalds static int __init parse_tag_mem32(const struct tag *tag) 5721da177e4SLinus Torvalds { 5731da177e4SLinus Torvalds if (meminfo.nr_banks >= NR_BANKS) { 5741da177e4SLinus Torvalds printk(KERN_WARNING 5751da177e4SLinus Torvalds "Ignoring memory bank 0x%08x size %dKB\n", 5761da177e4SLinus Torvalds tag->u.mem.start, tag->u.mem.size / 1024); 5771da177e4SLinus Torvalds return -EINVAL; 5781da177e4SLinus Torvalds } 5793a669411SRussell King add_memory(tag->u.mem.start, tag->u.mem.size); 5801da177e4SLinus Torvalds return 0; 5811da177e4SLinus Torvalds } 5821da177e4SLinus Torvalds 5831da177e4SLinus Torvalds __tagtable(ATAG_MEM, parse_tag_mem32); 5841da177e4SLinus Torvalds 5851da177e4SLinus Torvalds #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE) 5861da177e4SLinus Torvalds struct screen_info screen_info = { 5871da177e4SLinus Torvalds .orig_video_lines = 30, 5881da177e4SLinus Torvalds .orig_video_cols = 80, 5891da177e4SLinus Torvalds .orig_video_mode = 0, 5901da177e4SLinus Torvalds .orig_video_ega_bx = 0, 5911da177e4SLinus Torvalds .orig_video_isVGA = 1, 5921da177e4SLinus Torvalds .orig_video_points = 8 5931da177e4SLinus Torvalds }; 5941da177e4SLinus Torvalds 5951da177e4SLinus Torvalds static int __init parse_tag_videotext(const struct tag *tag) 5961da177e4SLinus Torvalds { 5971da177e4SLinus Torvalds screen_info.orig_x = tag->u.videotext.x; 5981da177e4SLinus Torvalds screen_info.orig_y = tag->u.videotext.y; 5991da177e4SLinus Torvalds screen_info.orig_video_page = tag->u.videotext.video_page; 6001da177e4SLinus Torvalds screen_info.orig_video_mode = tag->u.videotext.video_mode; 6011da177e4SLinus Torvalds screen_info.orig_video_cols = tag->u.videotext.video_cols; 6021da177e4SLinus Torvalds screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx; 6031da177e4SLinus Torvalds screen_info.orig_video_lines = tag->u.videotext.video_lines; 6041da177e4SLinus Torvalds screen_info.orig_video_isVGA = tag->u.videotext.video_isvga; 6051da177e4SLinus Torvalds screen_info.orig_video_points = tag->u.videotext.video_points; 6061da177e4SLinus Torvalds return 0; 6071da177e4SLinus Torvalds } 6081da177e4SLinus Torvalds 6091da177e4SLinus Torvalds __tagtable(ATAG_VIDEOTEXT, parse_tag_videotext); 6101da177e4SLinus Torvalds #endif 6111da177e4SLinus Torvalds 6121da177e4SLinus Torvalds static int __init parse_tag_ramdisk(const struct tag *tag) 6131da177e4SLinus Torvalds { 6141da177e4SLinus Torvalds setup_ramdisk((tag->u.ramdisk.flags & 1) == 0, 6151da177e4SLinus Torvalds (tag->u.ramdisk.flags & 2) == 0, 6161da177e4SLinus Torvalds tag->u.ramdisk.start, tag->u.ramdisk.size); 6171da177e4SLinus Torvalds return 0; 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds __tagtable(ATAG_RAMDISK, parse_tag_ramdisk); 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvalds static int __init parse_tag_initrd(const struct tag *tag) 6231da177e4SLinus Torvalds { 6241da177e4SLinus Torvalds printk(KERN_WARNING "ATAG_INITRD is deprecated; " 6251da177e4SLinus Torvalds "please update your bootloader.\n"); 6261da177e4SLinus Torvalds phys_initrd_start = __virt_to_phys(tag->u.initrd.start); 6271da177e4SLinus Torvalds phys_initrd_size = tag->u.initrd.size; 6281da177e4SLinus Torvalds return 0; 6291da177e4SLinus Torvalds } 6301da177e4SLinus Torvalds 6311da177e4SLinus Torvalds __tagtable(ATAG_INITRD, parse_tag_initrd); 6321da177e4SLinus Torvalds 6331da177e4SLinus Torvalds static int __init parse_tag_initrd2(const struct tag *tag) 6341da177e4SLinus Torvalds { 6351da177e4SLinus Torvalds phys_initrd_start = tag->u.initrd.start; 6361da177e4SLinus Torvalds phys_initrd_size = tag->u.initrd.size; 6371da177e4SLinus Torvalds return 0; 6381da177e4SLinus Torvalds } 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds __tagtable(ATAG_INITRD2, parse_tag_initrd2); 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds static int __init parse_tag_serialnr(const struct tag *tag) 6431da177e4SLinus Torvalds { 6441da177e4SLinus Torvalds system_serial_low = tag->u.serialnr.low; 6451da177e4SLinus Torvalds system_serial_high = tag->u.serialnr.high; 6461da177e4SLinus Torvalds return 0; 6471da177e4SLinus Torvalds } 6481da177e4SLinus Torvalds 6491da177e4SLinus Torvalds __tagtable(ATAG_SERIAL, parse_tag_serialnr); 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvalds static int __init parse_tag_revision(const struct tag *tag) 6521da177e4SLinus Torvalds { 6531da177e4SLinus Torvalds system_rev = tag->u.revision.rev; 6541da177e4SLinus Torvalds return 0; 6551da177e4SLinus Torvalds } 6561da177e4SLinus Torvalds 6571da177e4SLinus Torvalds __tagtable(ATAG_REVISION, parse_tag_revision); 6581da177e4SLinus Torvalds 6591da177e4SLinus Torvalds static int __init parse_tag_cmdline(const struct tag *tag) 6601da177e4SLinus Torvalds { 6611da177e4SLinus Torvalds strlcpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE); 6621da177e4SLinus Torvalds return 0; 6631da177e4SLinus Torvalds } 6641da177e4SLinus Torvalds 6651da177e4SLinus Torvalds __tagtable(ATAG_CMDLINE, parse_tag_cmdline); 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds /* 6681da177e4SLinus Torvalds * Scan the tag table for this tag, and call its parse function. 6691da177e4SLinus Torvalds * The tag table is built by the linker from all the __tagtable 6701da177e4SLinus Torvalds * declarations. 6711da177e4SLinus Torvalds */ 6721da177e4SLinus Torvalds static int __init parse_tag(const struct tag *tag) 6731da177e4SLinus Torvalds { 6741da177e4SLinus Torvalds extern struct tagtable __tagtable_begin, __tagtable_end; 6751da177e4SLinus Torvalds struct tagtable *t; 6761da177e4SLinus Torvalds 6771da177e4SLinus Torvalds for (t = &__tagtable_begin; t < &__tagtable_end; t++) 6781da177e4SLinus Torvalds if (tag->hdr.tag == t->tag) { 6791da177e4SLinus Torvalds t->parse(tag); 6801da177e4SLinus Torvalds break; 6811da177e4SLinus Torvalds } 6821da177e4SLinus Torvalds 6831da177e4SLinus Torvalds return t < &__tagtable_end; 6841da177e4SLinus Torvalds } 6851da177e4SLinus Torvalds 6861da177e4SLinus Torvalds /* 6871da177e4SLinus Torvalds * Parse all tags in the list, checking both the global and architecture 6881da177e4SLinus Torvalds * specific tag tables. 6891da177e4SLinus Torvalds */ 6901da177e4SLinus Torvalds static void __init parse_tags(const struct tag *t) 6911da177e4SLinus Torvalds { 6921da177e4SLinus Torvalds for (; t->hdr.size; t = tag_next(t)) 6931da177e4SLinus Torvalds if (!parse_tag(t)) 6941da177e4SLinus Torvalds printk(KERN_WARNING 6951da177e4SLinus Torvalds "Ignoring unrecognised tag 0x%08x\n", 6961da177e4SLinus Torvalds t->hdr.tag); 6971da177e4SLinus Torvalds } 6981da177e4SLinus Torvalds 6991da177e4SLinus Torvalds /* 7001da177e4SLinus Torvalds * This holds our defaults. 7011da177e4SLinus Torvalds */ 7021da177e4SLinus Torvalds static struct init_tags { 7031da177e4SLinus Torvalds struct tag_header hdr1; 7041da177e4SLinus Torvalds struct tag_core core; 7051da177e4SLinus Torvalds struct tag_header hdr2; 7061da177e4SLinus Torvalds struct tag_mem32 mem; 7071da177e4SLinus Torvalds struct tag_header hdr3; 7081da177e4SLinus Torvalds } init_tags __initdata = { 7091da177e4SLinus Torvalds { tag_size(tag_core), ATAG_CORE }, 7101da177e4SLinus Torvalds { 1, PAGE_SIZE, 0xff }, 7111da177e4SLinus Torvalds { tag_size(tag_mem32), ATAG_MEM }, 7121da177e4SLinus Torvalds { MEM_SIZE, PHYS_OFFSET }, 7131da177e4SLinus Torvalds { 0, ATAG_NONE } 7141da177e4SLinus Torvalds }; 7151da177e4SLinus Torvalds 7161da177e4SLinus Torvalds static void (*init_machine)(void) __initdata; 7171da177e4SLinus Torvalds 7181da177e4SLinus Torvalds static int __init customize_machine(void) 7191da177e4SLinus Torvalds { 7201da177e4SLinus Torvalds /* customizes platform devices, or adds new ones */ 7211da177e4SLinus Torvalds if (init_machine) 7221da177e4SLinus Torvalds init_machine(); 7231da177e4SLinus Torvalds return 0; 7241da177e4SLinus Torvalds } 7251da177e4SLinus Torvalds arch_initcall(customize_machine); 7261da177e4SLinus Torvalds 7271da177e4SLinus Torvalds void __init setup_arch(char **cmdline_p) 7281da177e4SLinus Torvalds { 7291da177e4SLinus Torvalds struct tag *tags = (struct tag *)&init_tags; 7301da177e4SLinus Torvalds struct machine_desc *mdesc; 7311da177e4SLinus Torvalds char *from = default_command_line; 7321da177e4SLinus Torvalds 7331da177e4SLinus Torvalds setup_processor(); 7341da177e4SLinus Torvalds mdesc = setup_machine(machine_arch_type); 7351da177e4SLinus Torvalds machine_name = mdesc->name; 7361da177e4SLinus Torvalds 7371da177e4SLinus Torvalds if (mdesc->soft_reboot) 7381da177e4SLinus Torvalds reboot_setup("s"); 7391da177e4SLinus Torvalds 7401da177e4SLinus Torvalds if (mdesc->param_offset) 7411da177e4SLinus Torvalds tags = phys_to_virt(mdesc->param_offset); 7421da177e4SLinus Torvalds 7431da177e4SLinus Torvalds /* 7441da177e4SLinus Torvalds * If we have the old style parameters, convert them to 7451da177e4SLinus Torvalds * a tag list. 7461da177e4SLinus Torvalds */ 7471da177e4SLinus Torvalds if (tags->hdr.tag != ATAG_CORE) 7481da177e4SLinus Torvalds convert_to_tag_list(tags); 7491da177e4SLinus Torvalds if (tags->hdr.tag != ATAG_CORE) 7501da177e4SLinus Torvalds tags = (struct tag *)&init_tags; 7511da177e4SLinus Torvalds 7521da177e4SLinus Torvalds if (mdesc->fixup) 7531da177e4SLinus Torvalds mdesc->fixup(mdesc, tags, &from, &meminfo); 7541da177e4SLinus Torvalds 7551da177e4SLinus Torvalds if (tags->hdr.tag == ATAG_CORE) { 7561da177e4SLinus Torvalds if (meminfo.nr_banks != 0) 7571da177e4SLinus Torvalds squash_mem_tags(tags); 7581da177e4SLinus Torvalds parse_tags(tags); 7591da177e4SLinus Torvalds } 7601da177e4SLinus Torvalds 7611da177e4SLinus Torvalds init_mm.start_code = (unsigned long) &_text; 7621da177e4SLinus Torvalds init_mm.end_code = (unsigned long) &_etext; 7631da177e4SLinus Torvalds init_mm.end_data = (unsigned long) &_edata; 7641da177e4SLinus Torvalds init_mm.brk = (unsigned long) &_end; 7651da177e4SLinus Torvalds 7661da177e4SLinus Torvalds memcpy(saved_command_line, from, COMMAND_LINE_SIZE); 7671da177e4SLinus Torvalds saved_command_line[COMMAND_LINE_SIZE-1] = '\0'; 7681da177e4SLinus Torvalds parse_cmdline(cmdline_p, from); 7691da177e4SLinus Torvalds paging_init(&meminfo, mdesc); 7701da177e4SLinus Torvalds request_standard_resources(&meminfo, mdesc); 7711da177e4SLinus Torvalds 772ccea7a19SRussell King cpu_init(); 773ccea7a19SRussell King 7741da177e4SLinus Torvalds /* 7751da177e4SLinus Torvalds * Set up various architecture-specific pointers 7761da177e4SLinus Torvalds */ 7771da177e4SLinus Torvalds init_arch_irq = mdesc->init_irq; 7781da177e4SLinus Torvalds system_timer = mdesc->timer; 7791da177e4SLinus Torvalds init_machine = mdesc->init_machine; 7801da177e4SLinus Torvalds 7811da177e4SLinus Torvalds #ifdef CONFIG_VT 7821da177e4SLinus Torvalds #if defined(CONFIG_VGA_CONSOLE) 7831da177e4SLinus Torvalds conswitchp = &vga_con; 7841da177e4SLinus Torvalds #elif defined(CONFIG_DUMMY_CONSOLE) 7851da177e4SLinus Torvalds conswitchp = &dummy_con; 7861da177e4SLinus Torvalds #endif 7871da177e4SLinus Torvalds #endif 7881da177e4SLinus Torvalds } 7891da177e4SLinus Torvalds 7901da177e4SLinus Torvalds 7911da177e4SLinus Torvalds static int __init topology_init(void) 7921da177e4SLinus Torvalds { 7931da177e4SLinus Torvalds int cpu; 7941da177e4SLinus Torvalds 7951da177e4SLinus Torvalds for_each_cpu(cpu) 7961da177e4SLinus Torvalds register_cpu(&per_cpu(cpu_data, cpu).cpu, cpu, NULL); 7971da177e4SLinus Torvalds 7981da177e4SLinus Torvalds return 0; 7991da177e4SLinus Torvalds } 8001da177e4SLinus Torvalds 8011da177e4SLinus Torvalds subsys_initcall(topology_init); 8021da177e4SLinus Torvalds 8031da177e4SLinus Torvalds static const char *hwcap_str[] = { 8041da177e4SLinus Torvalds "swp", 8051da177e4SLinus Torvalds "half", 8061da177e4SLinus Torvalds "thumb", 8071da177e4SLinus Torvalds "26bit", 8081da177e4SLinus Torvalds "fastmult", 8091da177e4SLinus Torvalds "fpa", 8101da177e4SLinus Torvalds "vfp", 8111da177e4SLinus Torvalds "edsp", 8121da177e4SLinus Torvalds "java", 8131da177e4SLinus Torvalds NULL 8141da177e4SLinus Torvalds }; 8151da177e4SLinus Torvalds 8161da177e4SLinus Torvalds static void 8171da177e4SLinus Torvalds c_show_cache(struct seq_file *m, const char *type, unsigned int cache) 8181da177e4SLinus Torvalds { 8191da177e4SLinus Torvalds unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0); 8201da177e4SLinus Torvalds 8211da177e4SLinus Torvalds seq_printf(m, "%s size\t\t: %d\n" 8221da177e4SLinus Torvalds "%s assoc\t\t: %d\n" 8231da177e4SLinus Torvalds "%s line length\t: %d\n" 8241da177e4SLinus Torvalds "%s sets\t\t: %d\n", 8251da177e4SLinus Torvalds type, mult << (8 + CACHE_SIZE(cache)), 8261da177e4SLinus Torvalds type, (mult << CACHE_ASSOC(cache)) >> 1, 8271da177e4SLinus Torvalds type, 8 << CACHE_LINE(cache), 8281da177e4SLinus Torvalds type, 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) - 8291da177e4SLinus Torvalds CACHE_LINE(cache))); 8301da177e4SLinus Torvalds } 8311da177e4SLinus Torvalds 8321da177e4SLinus Torvalds static int c_show(struct seq_file *m, void *v) 8331da177e4SLinus Torvalds { 8341da177e4SLinus Torvalds int i; 8351da177e4SLinus Torvalds 8361da177e4SLinus Torvalds seq_printf(m, "Processor\t: %s rev %d (%s)\n", 8371da177e4SLinus Torvalds cpu_name, (int)processor_id & 15, elf_platform); 8381da177e4SLinus Torvalds 8391da177e4SLinus Torvalds #if defined(CONFIG_SMP) 8401da177e4SLinus Torvalds for_each_online_cpu(i) { 8411da177e4SLinus Torvalds seq_printf(m, "Processor\t: %d\n", i); 8421da177e4SLinus Torvalds seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n", 8431da177e4SLinus Torvalds per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ), 8441da177e4SLinus Torvalds (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100); 8451da177e4SLinus Torvalds } 8461da177e4SLinus Torvalds #else /* CONFIG_SMP */ 8471da177e4SLinus Torvalds seq_printf(m, "BogoMIPS\t: %lu.%02lu\n", 8481da177e4SLinus Torvalds loops_per_jiffy / (500000/HZ), 8491da177e4SLinus Torvalds (loops_per_jiffy / (5000/HZ)) % 100); 8501da177e4SLinus Torvalds #endif 8511da177e4SLinus Torvalds 8521da177e4SLinus Torvalds /* dump out the processor features */ 8531da177e4SLinus Torvalds seq_puts(m, "Features\t: "); 8541da177e4SLinus Torvalds 8551da177e4SLinus Torvalds for (i = 0; hwcap_str[i]; i++) 8561da177e4SLinus Torvalds if (elf_hwcap & (1 << i)) 8571da177e4SLinus Torvalds seq_printf(m, "%s ", hwcap_str[i]); 8581da177e4SLinus Torvalds 8591da177e4SLinus Torvalds seq_printf(m, "\nCPU implementer\t: 0x%02x\n", processor_id >> 24); 8601da177e4SLinus Torvalds seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]); 8611da177e4SLinus Torvalds 8621da177e4SLinus Torvalds if ((processor_id & 0x0000f000) == 0x00000000) { 8631da177e4SLinus Torvalds /* pre-ARM7 */ 8641da177e4SLinus Torvalds seq_printf(m, "CPU part\t\t: %07x\n", processor_id >> 4); 8651da177e4SLinus Torvalds } else { 8661da177e4SLinus Torvalds if ((processor_id & 0x0000f000) == 0x00007000) { 8671da177e4SLinus Torvalds /* ARM7 */ 8681da177e4SLinus Torvalds seq_printf(m, "CPU variant\t: 0x%02x\n", 8691da177e4SLinus Torvalds (processor_id >> 16) & 127); 8701da177e4SLinus Torvalds } else { 8711da177e4SLinus Torvalds /* post-ARM7 */ 8721da177e4SLinus Torvalds seq_printf(m, "CPU variant\t: 0x%x\n", 8731da177e4SLinus Torvalds (processor_id >> 20) & 15); 8741da177e4SLinus Torvalds } 8751da177e4SLinus Torvalds seq_printf(m, "CPU part\t: 0x%03x\n", 8761da177e4SLinus Torvalds (processor_id >> 4) & 0xfff); 8771da177e4SLinus Torvalds } 8781da177e4SLinus Torvalds seq_printf(m, "CPU revision\t: %d\n", processor_id & 15); 8791da177e4SLinus Torvalds 8801da177e4SLinus Torvalds { 8811da177e4SLinus Torvalds unsigned int cache_info = read_cpuid(CPUID_CACHETYPE); 8821da177e4SLinus Torvalds if (cache_info != processor_id) { 8831da177e4SLinus Torvalds seq_printf(m, "Cache type\t: %s\n" 8841da177e4SLinus Torvalds "Cache clean\t: %s\n" 8851da177e4SLinus Torvalds "Cache lockdown\t: %s\n" 8861da177e4SLinus Torvalds "Cache format\t: %s\n", 8871da177e4SLinus Torvalds cache_types[CACHE_TYPE(cache_info)], 8881da177e4SLinus Torvalds cache_clean[CACHE_TYPE(cache_info)], 8891da177e4SLinus Torvalds cache_lockdown[CACHE_TYPE(cache_info)], 8901da177e4SLinus Torvalds CACHE_S(cache_info) ? "Harvard" : "Unified"); 8911da177e4SLinus Torvalds 8921da177e4SLinus Torvalds if (CACHE_S(cache_info)) { 8931da177e4SLinus Torvalds c_show_cache(m, "I", CACHE_ISIZE(cache_info)); 8941da177e4SLinus Torvalds c_show_cache(m, "D", CACHE_DSIZE(cache_info)); 8951da177e4SLinus Torvalds } else { 8961da177e4SLinus Torvalds c_show_cache(m, "Cache", CACHE_ISIZE(cache_info)); 8971da177e4SLinus Torvalds } 8981da177e4SLinus Torvalds } 8991da177e4SLinus Torvalds } 9001da177e4SLinus Torvalds 9011da177e4SLinus Torvalds seq_puts(m, "\n"); 9021da177e4SLinus Torvalds 9031da177e4SLinus Torvalds seq_printf(m, "Hardware\t: %s\n", machine_name); 9041da177e4SLinus Torvalds seq_printf(m, "Revision\t: %04x\n", system_rev); 9051da177e4SLinus Torvalds seq_printf(m, "Serial\t\t: %08x%08x\n", 9061da177e4SLinus Torvalds system_serial_high, system_serial_low); 9071da177e4SLinus Torvalds 9081da177e4SLinus Torvalds return 0; 9091da177e4SLinus Torvalds } 9101da177e4SLinus Torvalds 9111da177e4SLinus Torvalds static void *c_start(struct seq_file *m, loff_t *pos) 9121da177e4SLinus Torvalds { 9131da177e4SLinus Torvalds return *pos < 1 ? (void *)1 : NULL; 9141da177e4SLinus Torvalds } 9151da177e4SLinus Torvalds 9161da177e4SLinus Torvalds static void *c_next(struct seq_file *m, void *v, loff_t *pos) 9171da177e4SLinus Torvalds { 9181da177e4SLinus Torvalds ++*pos; 9191da177e4SLinus Torvalds return NULL; 9201da177e4SLinus Torvalds } 9211da177e4SLinus Torvalds 9221da177e4SLinus Torvalds static void c_stop(struct seq_file *m, void *v) 9231da177e4SLinus Torvalds { 9241da177e4SLinus Torvalds } 9251da177e4SLinus Torvalds 9261da177e4SLinus Torvalds struct seq_operations cpuinfo_op = { 9271da177e4SLinus Torvalds .start = c_start, 9281da177e4SLinus Torvalds .next = c_next, 9291da177e4SLinus Torvalds .stop = c_stop, 9301da177e4SLinus Torvalds .show = c_show 9311da177e4SLinus Torvalds }; 932