include/asm-arm/cpu-single.h

   1 /*
   2  *  linux/include/asm-arm/cpu-single.h
   3  *
   4  *  Copyright (C) 2000 Russell King
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 /*
  11  * Single CPU
  12  */
  13 #ifdef __STDC__
  14 #define __catify_fn(name,x)     name##x
  15 #else
  16 #define __catify_fn(name,x)     name/**/x
  17 #endif
  18 #define __cpu_fn(name,x)        __catify_fn(name,x)
  19
  20 /*
  21  * If we are supporting multiple CPUs, then we must use a table of
  22  * function pointers for this lot.  Otherwise, we can optimise the
  23  * table away.
  24  */
  25 #define cpu_proc_init                   __cpu_fn(CPU_NAME,_proc_init)
  26 #define cpu_proc_fin                    __cpu_fn(CPU_NAME,_proc_fin)
  27 #define cpu_reset                       __cpu_fn(CPU_NAME,_reset)
  28 #define cpu_do_idle                     __cpu_fn(CPU_NAME,_do_idle)
  29 #define cpu_dcache_clean_area           __cpu_fn(CPU_NAME,_dcache_clean_area)
  30 #define cpu__switch_mm                  __cpu_fn(CPU_NAME,_switch_mm)
  31 #define cpu_set_pte                     __cpu_fn(CPU_NAME,_set_pte)
  32
  33 #ifndef __ASSEMBLY__
  34
  35 #include <asm/memory.h>
  36 #include <asm/page.h>
  37
  38 struct mm_struct;
  39
  40 /* declare all the functions as extern */
  41 extern void cpu_proc_init(void);
  42 extern void cpu_proc_fin(void);
  43 extern int cpu_do_idle(void);
  44 extern void cpu_dcache_clean_area(void *, int);
  45 extern void cpu__switch_mm(unsigned long pgd_phys, struct mm_struct *mm);
  46 extern void cpu_set_pte(pte_t *ptep, pte_t pte);
  47
  48 extern volatile void cpu_reset(unsigned long addr);
  49
  50 #define cpu_switch_mm(pgd,mm) cpu__switch_mm(__virt_to_phys((unsigned long)(pgd)),mm)
  51
  52 #define cpu_get_pgd()   \
  53         ({                                              \
  54                 unsigned long pg;                       \
  55                 __asm__("mrc    p15, 0, %0, c2, c0, 0"  \
  56                          : "=r" (pg) : : "cc");         \
  57                 pg &= ~0x3fff;                          \
  58                 (pgd_t *)phys_to_virt(pg);              \
  59         })
  60
  61 #endif