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-rw-r--r--arch/powerpc/include/asm/pgtable.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
index dbb8ca172e44..07f55e601696 100644
--- a/arch/powerpc/include/asm/pgtable.h
+++ b/arch/powerpc/include/asm/pgtable.h
@@ -16,6 +16,32 @@ struct mm_struct;
16#endif 16#endif
17 17
18#ifndef __ASSEMBLY__ 18#ifndef __ASSEMBLY__
19
20/*
21 * Macro to mark a page protection value as "uncacheable".
22 */
23
24#define _PAGE_CACHE_CTL (_PAGE_COHERENT | _PAGE_GUARDED | _PAGE_NO_CACHE | \
25 _PAGE_WRITETHRU)
26
27#define pgprot_noncached(prot) (__pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) | \
28 _PAGE_NO_CACHE | _PAGE_GUARDED))
29
30#define pgprot_noncached_wc(prot) (__pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) | \
31 _PAGE_NO_CACHE))
32
33#define pgprot_cached(prot) (__pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) | \
34 _PAGE_COHERENT))
35
36#define pgprot_cached_wthru(prot) (__pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) | \
37 _PAGE_COHERENT | _PAGE_WRITETHRU))
38
39
40struct file;
41extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
42 unsigned long size, pgprot_t vma_prot);
43#define __HAVE_PHYS_MEM_ACCESS_PROT
44
19/* 45/*
20 * ZERO_PAGE is a global shared page that is always zero: used 46 * ZERO_PAGE is a global shared page that is always zero: used
21 * for zero-mapped memory areas etc.. 47 * for zero-mapped memory areas etc..