setup_processor()

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Linux version 2.6.35 arch\arm\kernel\setup.c

static void __init setup_processor(void)

{
   struct proc_info_list *list;

   /*
   * locate processor in the list of supported processor
   * types. The linker builds this table for us from the
   * entries in arch/arm/mm/proc-v6.S

* 搜索processpr类型，该类型在之前head.S中已经获取了，在proc-*.S中，

extern struct processor {
   /* MISC
   * get data abort address/flags
   */
   void (*_data_abort)(unsigned long pc);
   /*
   * Retrieve prefetch fault address
   */
   unsigned long (*_prefetch_abort)(unsigned long lr);
   /*
   * Set up any processor specifics
   */
   void (*_proc_init)(void);
   /*
   * Disable any processor specifics
   */
   void (*_proc_fin)(void);
   /*
   * Special stuff for a reset
   */
   void (*reset)(unsigned long addr) __attribute__((noreturn));
   /*
   * Idle the processor
   */
   int (*_do_idle)(void);
   /*
   * Processor architecture specific
   */
   /*
   * clean a virtual address range from the
   * D-cache without flushing the cache.
   */
   void (*dcache_clean_area)(void *addr, int size);

   /*
   * Set the page table
   */
   void (*switch_mm)(unsigned long pgd_phys, struct mm_struct *mm);
   /*
   * Set a possibly extended PTE. Non-extended PTEs should
   * ignore 'ext'.
   */
   void (*set_pte_ext)(pte_t *ptep, pte_t pte, unsigned int ext);
}processor;

ENTRY(v6_processor_functions)
   .word   v6_early_abort
   .word   v6_pabort
   .word   cpu_v6_proc_init
   .word   cpu_v6_proc_fin
   .word   cpu_v6_reset
   .word   cpu_v6_do_idle
   .word   cpu_v6_dcache_clean_area
   .word   cpu_v6_switch_mm
   .word   cpu_v6_set_pte_ext

struct proc_info_list {
   unsigned int       cpu_val;
   unsigned int       cpu_mask;
   unsigned long       __cpu_mm_mmu_flags;   /* used by head.S */
   unsigned long       __cpu_io_mmu_flags;   /* used by head.S */
   unsigned long       __cpu_flush;       /* used by head.S */
   const char       *arch_name;
   const char       *elf_name;
   unsigned int       elf_hwcap;
   const char       *cpu_name;
   struct processor   *proc;
   struct cpu_tlb_fns   *tlb;
   struct cpu_user_fns   *user;
   struct cpu_cache_fns   *cache;
};

__v6_proc_info:
   .long   0x0007b000
   .long   0x0007f000
   .long   PMD_TYPE_SECT | \
       PMD_SECT_AP_WRITE | \
       PMD_SECT_AP_READ | \
       PMD_FLAGS
   .long   PMD_TYPE_SECT | \
       PMD_SECT_XN | \
       PMD_SECT_AP_WRITE | \
       PMD_SECT_AP_READ
   b   __v6_setup
   .long   cpu_arch_name
   .long   cpu_elf_name
   .long   HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP|HWCAP_JAVA
   .long   cpu_v6_name
   .long   v6_processor_functions
   .long   v6wbi_tlb_fns
   .long   v6_user_fns
   .long   v6_cache_fns
   .size   __v6_proc_info, . - __v6_proc_info

   list = lookup_processor_type(read_cpuid_id());
   if (!list) {/* 如果没有获得则打印错误信息并进入死循环
       printk("CPU configuration botched (ID %08x), unable "
               "to continue.\n", read_cpuid_id());
       while (1);
   }

   cpu_name = list->cpu_name;        //cpu_arch_name

#ifdef MULTI_CPU
   processor = *list->proc;                   //v6_processor_functions
#endif
#ifdef MULTI_TLB
   cpu_tlb = *list->tlb;                            //v6wbi_tlb_fns
#endif
#ifdef MULTI_USER
   cpu_user = *list->user;                    //v6_user_fns
#endif
#ifdef MULTI_CACHE
   cpu_cache = *list->cache;               //v6_cache_fns
#endif

   printk("CPU: %s [%08x] revision %d (ARMv%s), cr=%08lx\n",
           cpu_name, read_cpuid_id(), read_cpuid_id() & 15,
           proc_arch[cpu_architecture()], cr_alignment);

   sprintf(init_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

   cacheid_init();
   cpu_proc_init();                                   //#define cpu_proc_init()           processor._proc_init()
}