LXR linux/arch/powerpc/include/asm/cacheflush.h

   1/*
   2 *  This program is free software; you can redistribute it and/or
   3 *  modify it under the terms of the GNU General Public License
   4 *  as published by the Free Software Foundation; either version
   5 *  2 of the License, or (at your option) any later version.
   6 */
   7#ifndef _ASM_POWERPC_CACHEFLUSH_H
   8#define _ASM_POWERPC_CACHEFLUSH_H
   9
  10#ifdef __KERNEL__
  11
  12#include <linux/mm.h>
  13#include <asm/cputable.h>
  14
  15/*
  16 * No cache flushing is required when address mappings are changed,
  17 * because the caches on PowerPCs are physically addressed.
  18 */
  19#define flush_cache_all()                       do { } while (0)
  20#define flush_cache_mm(mm)                      do { } while (0)
  21#define flush_cache_dup_mm(mm)                  do { } while (0)
  22#define flush_cache_range(vma, start, end)      do { } while (0)
  23#define flush_cache_page(vma, vmaddr, pfn)      do { } while (0)
  24#define flush_icache_page(vma, page)            do { } while (0)
  25#define flush_cache_vmap(start, end)            do { } while (0)
  26#define flush_cache_vunmap(start, end)          do { } while (0)
  27
  28#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
  29extern void flush_dcache_page(struct page *page);
  30#define flush_dcache_mmap_lock(mapping)         do { } while (0)
  31#define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  32
  33extern void __flush_icache_range(unsigned long, unsigned long);
  34static inline void flush_icache_range(unsigned long start, unsigned long stop)
  35{
  36        if (!cpu_has_feature(CPU_FTR_COHERENT_ICACHE))
  37                __flush_icache_range(start, stop);
  38}
  39
  40extern void flush_icache_user_range(struct vm_area_struct *vma,
  41                                    struct page *page, unsigned long addr,
  42                                    int len);
  43extern void __flush_dcache_icache(void *page_va);
  44extern void flush_dcache_icache_page(struct page *page);
  45#if defined(CONFIG_PPC32) && !defined(CONFIG_BOOKE)
  46extern void __flush_dcache_icache_phys(unsigned long physaddr);
  47#endif /* CONFIG_PPC32 && !CONFIG_BOOKE */
  48
  49extern void flush_dcache_range(unsigned long start, unsigned long stop);
  50#ifdef CONFIG_PPC32
  51extern void clean_dcache_range(unsigned long start, unsigned long stop);
  52extern void invalidate_dcache_range(unsigned long start, unsigned long stop);
  53#endif /* CONFIG_PPC32 */
  54#ifdef CONFIG_PPC64
  55extern void flush_inval_dcache_range(unsigned long start, unsigned long stop);
  56extern void flush_dcache_phys_range(unsigned long start, unsigned long stop);
  57#endif
  58
  59#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  60        do { \
  61                memcpy(dst, src, len); \
  62                flush_icache_user_range(vma, page, vaddr, len); \
  63        } while (0)
  64#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
  65        memcpy(dst, src, len)
  66
  67
  68
  69#ifdef CONFIG_DEBUG_PAGEALLOC
  70/* internal debugging function */
  71void kernel_map_pages(struct page *page, int numpages, int enable);
  72#endif
  73
  74#endif /* __KERNEL__ */
  75
  76#endif /* _ASM_POWERPC_CACHEFLUSH_H */
  77