diff options
author | Jeff Dike <jdike@addtoit.com> | 2005-09-04 00:57:41 +0200 |
---|---|---|
committer | Linus Torvalds <torvalds@evo.osdl.org> | 2005-09-05 09:06:22 +0200 |
commit | 08964c565b2fe49e338ffbe4907adcc19647ef16 (patch) | |
tree | dd37fefc7f654c8662154dd92efd0258e81a0ff4 /include/asm-um/pgtable.h | |
parent | [PATCH] uml: TLB operation batching (diff) | |
download | linux-08964c565b2fe49e338ffbe4907adcc19647ef16.tar.xz linux-08964c565b2fe49e338ffbe4907adcc19647ef16.zip |
[PATCH] uml: merge duplicated page table code
There is a lot of code which is duplicated between the 2 and 3 level
implementation, with the only difference that the 3-level implementation is a
bit more generalized (instead of accessing directly pte_t.pte, it uses the
appropriate access macros).
So this code is joined together.
As obvious, a "core code nice cleanup" is not a "stability-friendly patch" so
usual care applies.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-um/pgtable.h')
-rw-r--r-- | include/asm-um/pgtable.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/include/asm-um/pgtable.h b/include/asm-um/pgtable.h index e9336f616f9c..b48e0966ecd7 100644 --- a/include/asm-um/pgtable.h +++ b/include/asm-um/pgtable.h @@ -153,10 +153,24 @@ extern unsigned long pg0[1024]; #define pmd_page(pmd) phys_to_page(pmd_val(pmd) & PAGE_MASK) +#define pte_page(x) pfn_to_page(pte_pfn(x)) #define pte_address(x) (__va(pte_val(x) & PAGE_MASK)) #define mk_phys(a, r) ((a) + (((unsigned long) r) << REGION_SHIFT)) #define phys_addr(p) ((p) & ~REGION_MASK) +#define pte_present(x) pte_get_bits(x, (_PAGE_PRESENT | _PAGE_PROTNONE)) + +/* + * ================================= + * Flags checking section. + * ================================= + */ + +static inline int pte_none(pte_t pte) +{ + return pte_is_zero(pte); +} + /* * The following only work if pte_present() is true. * Undefined behaviour if not.. @@ -212,6 +226,18 @@ static inline int pte_newprot(pte_t pte) return(pte_present(pte) && (pte_get_bits(pte, _PAGE_NEWPROT))); } +/* + * ================================= + * Flags setting section. + * ================================= + */ + +static inline pte_t pte_mknewprot(pte_t pte) +{ + pte_set_bits(pte, _PAGE_NEWPROT); + return(pte); +} + static inline pte_t pte_rdprotect(pte_t pte) { pte_clear_bits(pte, _PAGE_USER); @@ -280,6 +306,26 @@ static inline pte_t pte_mkuptodate(pte_t pte) return(pte); } +static inline pte_t pte_mknewpage(pte_t pte) +{ + pte_set_bits(pte, _PAGE_NEWPAGE); + return(pte); +} + +static inline void set_pte(pte_t *pteptr, pte_t pteval) +{ + pte_copy(*pteptr, pteval); + + /* If it's a swap entry, it needs to be marked _PAGE_NEWPAGE so + * fix_range knows to unmap it. _PAGE_NEWPROT is specific to + * mapped pages. + */ + + *pteptr = pte_mknewpage(*pteptr); + if(pte_present(*pteptr)) *pteptr = pte_mknewprot(*pteptr); +} +#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) + extern phys_t page_to_phys(struct page *page); /* |