ARM Linux Processor Information

 

It's important for Linux kernel to load vmlinux.lds:

 

arch/arm/kernel/vmlinux.lds----->   __proc_info_begin=.;

                                                       *(.proc.info.init)

                                                       __proc_info_end=.;

 

arch/arm/mm/proc-armv6.S-------> .section ".proc.info.init" #alloc, #execinstr

                                                       .type      __arm6_proc_info,#object

                                                        __arm6_proc_info:

 

arch/arm/kernel/head-common.S--> __lookup_processor_type:

                                                         ......

                                                         .long __proc_info_begin

                                                         .long __proc_info_end

The .proc.info.init is structure :proc_info_list

arch/arm/include/asm/procinfo.h

struct proc_info_list{

   unsigned int cpu_val;

   unsigned int cpu_mask

   unsigned long  __cpu_mm_mmu_flags;

   unsigned long  __cpu_io_mmu_flags;

   unsigned long  __cpu_flush;

   const char  *arch_name;

   const char  *elf_name;

   const char  *cpu_name;

   unsigned int  elf_hwcap;

   struct processor    *proc;                                                                     
   struct cpu_tlb_fns  *tlb;                                                                                        
   struct cpu_user_fns *user;                                                                                    
   struct cpu_cache_fns    *cache;                                                                              

};