include/asm-arm/proc-fns.h

   1 /*
   2  * linux/include/asm-arm/proc-fns.h
   3  *
   4  * Copyright (C) 1997 Russell King
   5  */
   6 #ifndef __ASM_PROCFNS_H
   7 #define __ASM_PROCFNS_H
   8
   9 #include <asm/page.h>
  10
  11 #ifdef __KERNEL__
  12
  13 /* forward-declare task_struct */
  14 struct task_struct;
  15
  16 /*
  17  * Don't change this structure
  18  */
  19 extern struct processor {
  20         const char *name;
  21         /* MISC
  22          *
  23          * flush caches for task switch
  24          */
  25         struct task_struct *(*_switch_to)(struct task_struct *prev, struct task_struct *next);
  26         /*
  27          * get data abort address/flags
  28          */
  29         void (*_data_abort)(unsigned long pc);
  30         /*
  31          * check for any bugs
  32          */
  33         void (*_check_bugs)(void);
  34         /*
  35          * Set up any processor specifics
  36          */
  37         void (*_proc_init)(void);
  38         /*
  39          * Disable any processor specifics
  40          */
  41         void (*_proc_fin)(void);
  42         /*
  43          * Processor architecture specific
  44          */
  45         union {
  46                 struct {
  47                         /* CACHE
  48                          *
  49                          * flush all caches
  50                          */
  51                         void (*_flush_cache_all)(void);
  52                         /*
  53                          * flush a specific page or pages
  54                          */
  55                         void (*_flush_cache_area)(unsigned long address, unsigned long end, int flags);
  56                         /*
  57                          * flush cache entry for an address
  58                          */
  59                         void (*_flush_cache_entry)(unsigned long address);
  60                         /*
  61                          * clean a virtual address range from the
  62                          * D-cache without flushing the cache.
  63                          */
  64                         void (*_clean_cache_area)(unsigned long start, unsigned long size);
  65                         /*
  66                          * flush a page to RAM
  67                          */
  68                         void (*_flush_ram_page)(unsigned long page);
  69                         /* TLB
  70                          *
  71                          * flush all TLBs
  72                          */
  73                         void (*_flush_tlb_all)(void);
  74                         /*
  75                          * flush a specific TLB
  76                          */
  77                         void (*_flush_tlb_area)(unsigned long address, unsigned long end, int flags);
  78                         /*
  79                          * Set a PMD (handling IMP bit 4)
  80                          */
  81                         void (*_set_pmd)(pmd_t *pmdp, pmd_t pmd);
  82                         /*
  83                          * Set a PTE
  84                          */
  85                         void (*_set_pte)(pte_t *ptep, pte_t pte);
  86                         /*
  87                          * Special stuff for a reset
  88                          */
  89                         unsigned long (*reset)(void);
  90                         /*
  91                          * flush an icached page
  92                          */
  93                         void (*_flush_icache_area)(unsigned long start, unsigned long size);
  94                         /*
  95                          * write back dirty cached data
  96                          */
  97                         void (*_cache_wback_area)(unsigned long start, unsigned long end);
  98                         /*
  99                          * purge cached data without (necessarily) writing it back
 100                          */
 101                         void (*_cache_purge_area)(unsigned long start, unsigned long end);
 102                 } armv3v4;
 103                 struct {
 104                         /* MEMC
 105                          *
 106                          * remap memc tables
 107                          */
 108                         void (*_remap_memc)(void *tsk);
 109                         /*
 110                          * update task's idea of mmap
 111                          */
 112                         void (*_update_map)(void *tsk);
 113                         /*
 114                          * update task's idea after abort
 115                          */
 116                         void (*_update_mmu_cache)(void *vma, unsigned long addr, pte_t pte);
 117                         /* XCHG
 118                          */
 119                         unsigned long (*_xchg_1)(unsigned long x, volatile void *ptr);
 120                         unsigned long (*_xchg_2)(unsigned long x, volatile void *ptr);
 121                         unsigned long (*_xchg_4)(unsigned long x, volatile void *ptr);
 122                 } armv2;
 123         } u;
 124 } processor;
 125 #endif
 126 #endif
 127