X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Farm%2Fkernel%2Fsetup.c;h=9fc9af88c60c72e54cad5e835c579b95027624e6;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=c2a7da3ac0f1fff7b310c8760984abfa70939299;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index c2a7da3ac..9fc9af88c 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -23,11 +23,10 @@ #include #include #include +#include #include #include -#include -#include #include #include #include @@ -38,6 +37,8 @@ #include #include +#include "compat.h" + #ifndef MEM_SIZE #define MEM_SIZE (16*1024*1024) #endif @@ -54,10 +55,7 @@ static int __init fpe_setup(char *line) __setup("fpe=", fpe_setup); #endif -extern unsigned int mem_fclk_21285; extern void paging_init(struct meminfo *, struct machine_desc *desc); -extern void convert_to_tag_list(struct tag *tags); -extern void squash_mem_tags(struct tag *tag); extern void reboot_setup(char *str); extern int root_mountflags; extern void _stext, _text, _etext, __data_start, _edata, _end; @@ -92,6 +90,14 @@ struct cpu_user_fns cpu_user; struct cpu_cache_fns cpu_cache; #endif +struct stack { + u32 irq[3]; + u32 abt[3]; + u32 und[3]; +} ____cacheline_aligned; + +static struct stack stacks[NR_CPUS]; + char elf_platform[ELF_PLATFORM_SIZE]; EXPORT_SYMBOL(elf_platform); @@ -199,7 +205,7 @@ static const char *proc_arch[] = { "5TE", "5TEJ", "6TEJ", - "?(10)", + "7", "?(11)", "?(12)", "?(13)", @@ -246,20 +252,26 @@ static void __init dump_cpu_info(int cpu) dump_cache("cache", cpu, CACHE_ISIZE(info)); } } + + if (arch_is_coherent()) + printk("Cache coherency enabled\n"); } int cpu_architecture(void) { int cpu_arch; - if ((processor_id & 0x0000f000) == 0) { + if ((processor_id & 0x0008f000) == 0) { cpu_arch = CPU_ARCH_UNKNOWN; - } else if ((processor_id & 0x0000f000) == 0x00007000) { + } else if ((processor_id & 0x0008f000) == 0x00007000) { cpu_arch = (processor_id & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3; - } else { + } else if ((processor_id & 0x00080000) == 0x00000000) { cpu_arch = (processor_id >> 16) & 7; if (cpu_arch) cpu_arch += CPU_ARCH_ARMv3; + } else { + /* the revised CPUID */ + cpu_arch = ((processor_id >> 12) & 0xf) - 0xb + CPU_ARCH_ARMv6; } return cpu_arch; @@ -269,7 +281,7 @@ int cpu_architecture(void) * These functions re-use the assembly code in head.S, which * already provide the required functionality. */ -extern struct proc_info_list *lookup_processor_type(void); +extern struct proc_info_list *lookup_processor_type(unsigned int); extern struct machine_desc *lookup_machine_type(unsigned int); static void __init setup_processor(void) @@ -281,7 +293,7 @@ static void __init setup_processor(void) * types. The linker builds this table for us from the * entries in arch/arm/mm/proc-*.S */ - list = lookup_processor_type(); + list = lookup_processor_type(processor_id); if (!list) { printk("CPU configuration botched (ID %08x), unable " "to continue.\n", processor_id); @@ -307,15 +319,61 @@ static void __init setup_processor(void) cpu_name, processor_id, (int)processor_id & 15, proc_arch[cpu_architecture()]); - dump_cpu_info(smp_processor_id()); - sprintf(system_utsname.machine, "%s%c", list->arch_name, ENDIANNESS); sprintf(elf_platform, "%s%c", list->elf_name, ENDIANNESS); elf_hwcap = list->elf_hwcap; +#ifndef CONFIG_ARM_THUMB + elf_hwcap &= ~HWCAP_THUMB; +#endif +#ifndef CONFIG_VFP + elf_hwcap &= ~HWCAP_VFP; +#endif cpu_proc_init(); } +/* + * cpu_init - initialise one CPU. + * + * cpu_init dumps the cache information, initialises SMP specific + * information, and sets up the per-CPU stacks. + */ +void cpu_init(void) +{ + unsigned int cpu = smp_processor_id(); + struct stack *stk = &stacks[cpu]; + + if (cpu >= NR_CPUS) { + printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu); + BUG(); + } + + if (system_state == SYSTEM_BOOTING) + dump_cpu_info(cpu); + + /* + * setup stacks for re-entrant exception handlers + */ + __asm__ ( + "msr cpsr_c, %1\n\t" + "add sp, %0, %2\n\t" + "msr cpsr_c, %3\n\t" + "add sp, %0, %4\n\t" + "msr cpsr_c, %5\n\t" + "add sp, %0, %6\n\t" + "msr cpsr_c, %7" + : + : "r" (stk), + "I" (PSR_F_BIT | PSR_I_BIT | IRQ_MODE), + "I" (offsetof(struct stack, irq[0])), + "I" (PSR_F_BIT | PSR_I_BIT | ABT_MODE), + "I" (offsetof(struct stack, abt[0])), + "I" (PSR_F_BIT | PSR_I_BIT | UND_MODE), + "I" (offsetof(struct stack, und[0])), + "I" (PSR_F_BIT | PSR_I_BIT | SVC_MODE) + : "r14"); +} + static struct machine_desc * __init setup_machine(unsigned int nr) { struct machine_desc *list; @@ -349,6 +407,20 @@ static void __init early_initrd(char **p) } __early_param("initrd=", early_initrd); +static void __init arm_add_memory(unsigned long start, unsigned long size) +{ + /* + * Ensure that start/size are aligned to a page boundary. + * Size is appropriately rounded down, start is rounded up. + */ + size -= start & ~PAGE_MASK; + + meminfo.bank[meminfo.nr_banks].start = PAGE_ALIGN(start); + meminfo.bank[meminfo.nr_banks].size = size & PAGE_MASK; + meminfo.bank[meminfo.nr_banks].node = PHYS_TO_NID(start); + meminfo.nr_banks += 1; +} + /* * Pick out the memory size. We look for mem=size@start, * where start and size are "size[KkMm]" @@ -373,10 +445,7 @@ static void __init early_mem(char **p) if (**p == '@') start = memparse(*p + 1, p); - meminfo.bank[meminfo.nr_banks].start = start; - meminfo.bank[meminfo.nr_banks].size = size; - meminfo.bank[meminfo.nr_banks].node = PHYS_TO_NID(start); - meminfo.nr_banks += 1; + arm_add_memory(start, size); } __early_param("mem=", early_mem); @@ -518,11 +587,7 @@ static int __init parse_tag_mem32(const struct tag *tag) tag->u.mem.start, tag->u.mem.size / 1024); return -EINVAL; } - meminfo.bank[meminfo.nr_banks].start = tag->u.mem.start; - meminfo.bank[meminfo.nr_banks].size = tag->u.mem.size; - meminfo.bank[meminfo.nr_banks].node = PHYS_TO_NID(tag->u.mem.start); - meminfo.nr_banks += 1; - + arm_add_memory(tag->u.mem.start, tag->u.mem.size); return 0; } @@ -683,8 +748,8 @@ void __init setup_arch(char **cmdline_p) if (mdesc->soft_reboot) reboot_setup("s"); - if (mdesc->param_offset) - tags = phys_to_virt(mdesc->param_offset); + if (mdesc->boot_params) + tags = phys_to_virt(mdesc->boot_params); /* * If we have the old style parameters, convert them to @@ -715,6 +780,12 @@ void __init setup_arch(char **cmdline_p) paging_init(&meminfo, mdesc); request_standard_resources(&meminfo, mdesc); +#ifdef CONFIG_SMP + smp_init_cpus(); +#endif + + cpu_init(); + /* * Set up various architecture-specific pointers */ @@ -736,7 +807,7 @@ static int __init topology_init(void) { int cpu; - for_each_cpu(cpu) + for_each_possible_cpu(cpu) register_cpu(&per_cpu(cpu_data, cpu).cpu, cpu, NULL); return 0; @@ -782,7 +853,12 @@ static int c_show(struct seq_file *m, void *v) #if defined(CONFIG_SMP) for_each_online_cpu(i) { - seq_printf(m, "Processor\t: %d\n", i); + /* + * glibc reads /proc/cpuinfo to determine the number of + * online processors, looking for lines beginning with + * "processor". Give glibc what it expects. + */ + seq_printf(m, "processor\t: %d\n", i); seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n", per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ), (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100); @@ -803,11 +879,11 @@ static int c_show(struct seq_file *m, void *v) seq_printf(m, "\nCPU implementer\t: 0x%02x\n", processor_id >> 24); seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]); - if ((processor_id & 0x0000f000) == 0x00000000) { + if ((processor_id & 0x0008f000) == 0x00000000) { /* pre-ARM7 */ seq_printf(m, "CPU part\t\t: %07x\n", processor_id >> 4); } else { - if ((processor_id & 0x0000f000) == 0x00007000) { + if ((processor_id & 0x0008f000) == 0x00007000) { /* ARM7 */ seq_printf(m, "CPU variant\t: 0x%02x\n", (processor_id >> 16) & 127);