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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _ASM_POWERPC_CACHEFLUSH_H
#define _ASM_POWERPC_CACHEFLUSH_H
#ifdef __KERNEL__
#include <linux/mm.h>
#include <asm/cputable.h>
#include <asm/cpu_has_feature.h>
/*
* No cache flushing is required when address mappings are changed,
* because the caches on PowerPCs are physically addressed.
*/
#define flush_cache_all() do { } while (0)
#define flush_cache_mm(mm) do { } while (0)
#define flush_cache_dup_mm(mm) do { } while (0)
#define flush_cache_range(vma, start, end) do { } while (0)
#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
#define flush_icache_page(vma, page) do { } while (0)
#define flush_cache_vunmap(start, end) do { } while (0)
#ifdef CONFIG_PPC_BOOK3S_64
/*
* Book3s has no ptesync after setting a pte, so without this ptesync it's
* possible for a kernel virtual mapping access to return a spurious fault
* if it's accessed right after the pte is set. The page fault handler does
* not expect this type of fault. flush_cache_vmap is not exactly the right
* place to put this, but it seems to work well enough.
*/
#define flush_cache_vmap(start, end) do { asm volatile("ptesync" ::: "memory"); } while (0)
#else
#define flush_cache_vmap(start, end) do { } while (0)
#endif
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
extern void flush_dcache_page(struct page *page);
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
extern void flush_icache_range(unsigned long, unsigned long);
extern void flush_icache_user_range(struct vm_area_struct *vma,
struct page *page, unsigned long addr,
int len);
extern void __flush_dcache_icache(void *page_va);
extern void flush_dcache_icache_page(struct page *page);
#if defined(CONFIG_PPC32) && !defined(CONFIG_BOOKE)
extern void __flush_dcache_icache_phys(unsigned long physaddr);
#else
static inline void __flush_dcache_icache_phys(unsigned long physaddr)
{
BUG();
}
#endif
#ifdef CONFIG_PPC32
/*
* Write any modified data cache blocks out to memory and invalidate them.
* Does not invalidate the corresponding instruction cache blocks.
*/
static inline void flush_dcache_range(unsigned long start, unsigned long stop)
{
void *addr = (void *)(start & ~(L1_CACHE_BYTES - 1));
unsigned long size = stop - (unsigned long)addr + (L1_CACHE_BYTES - 1);
unsigned long i;
for (i = 0; i < size >> L1_CACHE_SHIFT; i++, addr += L1_CACHE_BYTES)
dcbf(addr);
mb(); /* sync */
}
/*
* Write any modified data cache blocks out to memory.
* Does not invalidate the corresponding cache lines (especially for
* any corresponding instruction cache).
*/
static inline void clean_dcache_range(unsigned long start, unsigned long stop)
{
void *addr = (void *)(start & ~(L1_CACHE_BYTES - 1));
unsigned long size = stop - (unsigned long)addr + (L1_CACHE_BYTES - 1);
unsigned long i;
for (i = 0; i < size >> L1_CACHE_SHIFT; i++, addr += L1_CACHE_BYTES)
dcbst(addr);
mb(); /* sync */
}
/*
* Like above, but invalidate the D-cache. This is used by the 8xx
* to invalidate the cache so the PPC core doesn't get stale data
* from the CPM (no cache snooping here :-).
*/
static inline void invalidate_dcache_range(unsigned long start,
unsigned long stop)
{
void *addr = (void *)(start & ~(L1_CACHE_BYTES - 1));
unsigned long size = stop - (unsigned long)addr + (L1_CACHE_BYTES - 1);
unsigned long i;
for (i = 0; i < size >> L1_CACHE_SHIFT; i++, addr += L1_CACHE_BYTES)
dcbi(addr);
mb(); /* sync */
}
#endif /* CONFIG_PPC32 */
#ifdef CONFIG_PPC64
extern void flush_dcache_range(unsigned long start, unsigned long stop);
extern void flush_inval_dcache_range(unsigned long start, unsigned long stop);
#endif
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
do { \
memcpy(dst, src, len); \
flush_icache_user_range(vma, page, vaddr, len); \
} while (0)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
memcpy(dst, src, len)
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_CACHEFLUSH_H */
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