UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

ARC: mm: Introduce PTE_SPECIAL 

Needed for THP, but will also come in handy for fast GUP later

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2015-02-16 19:01:29 +05:30
parent 129cbed54a
commit 24830fc782
1 changed files with 5 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
arch/arc/include/asm/pgtable.h
View File

@ -61,6 +61,7 @@
#define _PAGE_WRITE (1<<4) /* Page has user write perm (H) */
#define _PAGE_READ (1<<5) /* Page has user read perm (H) */
#define _PAGE_DIRTY (1<<6) /* Page modified (dirty) (S) */
#define _PAGE_SPECIAL (1<<7)
#define _PAGE_GLOBAL (1<<8) /* Page is global (H) */
#define _PAGE_PRESENT (1<<10) /* TLB entry is valid (H) */
@ -72,6 +73,7 @@
#define _PAGE_READ (1<<3) /* Page has user read perm (H) */
#define _PAGE_ACCESSED (1<<4) /* Page is accessed (S) */
#define _PAGE_DIRTY (1<<5) /* Page modified (dirty) (S) */
#define _PAGE_SPECIAL (1<<6)
#if (CONFIG_ARC_MMU_VER >= 4)
#define _PAGE_WTHRU (1<<7) /* Page cache mode write-thru (H) */
@ -292,7 +294,7 @@ static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
#define pte_write(pte) (pte_val(pte) & _PAGE_WRITE)
#define pte_dirty(pte) (pte_val(pte) & _PAGE_DIRTY)
#define pte_young(pte) (pte_val(pte) & _PAGE_ACCESSED)
#define pte_special(pte) (0)
#define pte_special(pte) (pte_val(pte) & _PAGE_SPECIAL)
#define PTE_BIT_FUNC(fn, op) \
static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; }
@ -305,8 +307,9 @@ PTE_BIT_FUNC(mkold, &= ~(_PAGE_ACCESSED));
PTE_BIT_FUNC(mkyoung, |= (_PAGE_ACCESSED));
PTE_BIT_FUNC(exprotect, &= ~(_PAGE_EXECUTE));
PTE_BIT_FUNC(mkexec, |= (_PAGE_EXECUTE));
PTE_BIT_FUNC(mkspecial, |= (_PAGE_SPECIAL));
static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
#define __HAVE_ARCH_PTE_SPECIAL
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{