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ARC: mm: pte flags comsetic cleanups, comments 

No semantical changes

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2013-12-05 12:05:05 +05:30
parent e8a75963a4
commit 129cbed54a
2 changed files with 17 additions and 22 deletions
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37
arch/arc/include/asm/pgtable.h
View File

@ -60,7 +60,7 @@
#define _PAGE_EXECUTE (1<<3) /* Page has user execute perm (H) */
#define _PAGE_WRITE (1<<4) /* Page has user write perm (H) */
#define _PAGE_READ (1<<5) /* Page has user read perm (H) */
#define _PAGE_MODIFIED (1<<6) /* Page modified (dirty) (S) */
#define _PAGE_DIRTY (1<<6) /* Page modified (dirty) (S) */
#define _PAGE_GLOBAL (1<<8) /* Page is global (H) */
#define _PAGE_PRESENT (1<<10) /* TLB entry is valid (H) */
@ -71,7 +71,7 @@
#define _PAGE_WRITE (1<<2) /* Page has user write perm (H) */
#define _PAGE_READ (1<<3) /* Page has user read perm (H) */
#define _PAGE_ACCESSED (1<<4) /* Page is accessed (S) */
#define _PAGE_MODIFIED (1<<5) /* Page modified (dirty) (S) */
#define _PAGE_DIRTY (1<<5) /* Page modified (dirty) (S) */
#if (CONFIG_ARC_MMU_VER >= 4)
#define _PAGE_WTHRU (1<<7) /* Page cache mode write-thru (H) */
@ -92,21 +92,16 @@
#define _K_PAGE_PERMS (_PAGE_EXECUTE | _PAGE_WRITE | _PAGE_READ | \
_PAGE_GLOBAL | _PAGE_PRESENT)
#ifdef CONFIG_ARC_CACHE_PAGES
#define _PAGE_DEF_CACHEABLE _PAGE_CACHEABLE
#else
#define _PAGE_DEF_CACHEABLE (0)
#ifndef CONFIG_ARC_CACHE_PAGES
#undef _PAGE_CACHEABLE
#define _PAGE_CACHEABLE 0
#endif
/* Helper for every "user" page
* -kernel can R/W/X
* -by default cached, unless config otherwise
* -present in memory
*/
#define ___DEF (_PAGE_PRESENT | _PAGE_DEF_CACHEABLE)
/* Defaults for every user page */
#define ___DEF (_PAGE_PRESENT | _PAGE_CACHEABLE)
/* Set of bits not changed in pte_modify */
#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_MODIFIED)
#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
/* More Abbrevaited helpers */
#define PAGE_U_NONE __pgprot(___DEF)
@ -122,7 +117,7 @@
* user vaddr space - visible in all addr spaces, but kernel mode only
* Thus Global, all-kernel-access, no-user-access, cached
*/
#define PAGE_KERNEL __pgprot(_K_PAGE_PERMS | _PAGE_DEF_CACHEABLE)
#define PAGE_KERNEL __pgprot(_K_PAGE_PERMS | _PAGE_CACHEABLE)
/* ioremap */
#define PAGE_KERNEL_NO_CACHE __pgprot(_K_PAGE_PERMS)
@ -191,16 +186,16 @@
/* Optimal Sizing of Pg Tbl - based on MMU page size */
#if defined(CONFIG_ARC_PAGE_SIZE_8K)
#define BITS_FOR_PTE 8
#define BITS_FOR_PTE 8 /* 11:8:13 */
#elif defined(CONFIG_ARC_PAGE_SIZE_16K)
#define BITS_FOR_PTE 8
#define BITS_FOR_PTE 8 /* 10:8:14 */
#elif defined(CONFIG_ARC_PAGE_SIZE_4K)
#define BITS_FOR_PTE 9
#define BITS_FOR_PTE 9 /* 11:9:12 */
#endif
#define BITS_FOR_PGD (32 - BITS_FOR_PTE - BITS_IN_PAGE)
#define PGDIR_SHIFT (BITS_FOR_PTE + BITS_IN_PAGE)
#define PGDIR_SHIFT (32 - BITS_FOR_PGD)
#define PGDIR_SIZE (1UL << PGDIR_SHIFT) /* vaddr span, not PDG sz */
#define PGDIR_MASK (~(PGDIR_SIZE-1))
@ -295,7 +290,7 @@ static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
/* Zoo of pte_xxx function */
#define pte_read(pte) (pte_val(pte) & _PAGE_READ)
#define pte_write(pte) (pte_val(pte) & _PAGE_WRITE)
#define pte_dirty(pte) (pte_val(pte) & _PAGE_MODIFIED)
#define pte_dirty(pte) (pte_val(pte) & _PAGE_DIRTY)
#define pte_young(pte) (pte_val(pte) & _PAGE_ACCESSED)
#define pte_special(pte) (0)
@ -304,8 +299,8 @@ static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
PTE_BIT_FUNC(wrprotect, &= ~(_PAGE_WRITE));
PTE_BIT_FUNC(mkwrite, |= (_PAGE_WRITE));
PTE_BIT_FUNC(mkclean, &= ~(_PAGE_MODIFIED));
PTE_BIT_FUNC(mkdirty, |= (_PAGE_MODIFIED));
PTE_BIT_FUNC(mkclean, &= ~(_PAGE_DIRTY));
PTE_BIT_FUNC(mkdirty, |= (_PAGE_DIRTY));
PTE_BIT_FUNC(mkold, &= ~(_PAGE_ACCESSED));
PTE_BIT_FUNC(mkyoung, |= (_PAGE_ACCESSED));
PTE_BIT_FUNC(exprotect, &= ~(_PAGE_EXECUTE));

2
arch/arc/mm/tlbex.S
View File

@ -365,7 +365,7 @@ ENTRY(EV_TLBMissD)
lr r3, [ecr]
or r0, r0, _PAGE_ACCESSED ; Accessed bit always
btst_s r3, ECR_C_BIT_DTLB_ST_MISS ; See if it was a Write Access ?
or.nz r0, r0, _PAGE_MODIFIED ; if Write, set Dirty bit as well
or.nz r0, r0, _PAGE_DIRTY ; if Write, set Dirty bit as well
st_s r0, [r1] ; Write back PTE
CONV_PTE_TO_TLB