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[ARM] Use #defined constants for manipulating v6 hardware PTE bits

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Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2005-08-10 16:15:32 +01:00 committed by Russell King
parent 86b3786078
commit 1b9749e7f1
2 changed files with 16 additions and 16 deletions
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20
arch/arm/mm/proc-v6.S
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@ -111,12 +111,6 @@ ENTRY(cpu_v6_switch_mm)
mcr p15, 0, r1, c13, c0, 1 @ set context ID
mov pc, lr
#define nG (1 << 11)
#define APX (1 << 9)
#define AP1 (1 << 5)
#define AP0 (1 << 4)
#define XN (1 << 0)
/*
* cpu_v6_set_pte(ptep, pte)
*
@ -141,22 +135,22 @@ ENTRY(cpu_v6_set_pte)
bic r2, r1, #0x00000ff0
bic r2, r2, #0x00000003
orr r2, r2, #AP0 | 2
orr r2, r2, #PTE_EXT_AP0 | 2
tst r1, #L_PTE_WRITE
tstne r1, #L_PTE_DIRTY
orreq r2, r2, #APX
orreq r2, r2, #PTE_EXT_APX
tst r1, #L_PTE_USER
orrne r2, r2, #AP1 | nG
tstne r2, #APX
bicne r2, r2, #APX | AP0
orrne r2, r2, #PTE_EXT_AP1 | PTE_EXT_NG
tstne r2, #PTE_EXT_APX
bicne r2, r2, #PTE_EXT_APX | PTE_EXT_AP0
tst r1, #L_PTE_YOUNG
biceq r2, r2, #APX | AP1 | AP0
biceq r2, r2, #PTE_EXT_APX | PTE_EXT_AP_MASK
@ tst r1, #L_PTE_EXEC
@ orreq r2, r2, #XN
@ orreq r2, r2, #PTE_EXT_XN
tst r1, #L_PTE_PRESENT
moveq r2, #0

12
include/asm-arm/pgtable.h
View file

@ -188,12 +188,18 @@ extern void __pgd_error(const char *file, int line, unsigned long val);
/*
* - extended small page/tiny page
*/
#define PTE_EXT_XN (1 << 0) /* v6 */
#define PTE_EXT_AP_MASK (3 << 4)
#define PTE_EXT_AP0 (1 << 4)
#define PTE_EXT_AP1 (2 << 4)
#define PTE_EXT_AP_UNO_SRO (0 << 4)
#define PTE_EXT_AP_UNO_SRW (1 << 4)
#define PTE_EXT_AP_URO_SRW (2 << 4)
#define PTE_EXT_AP_URW_SRW (3 << 4)
#define PTE_EXT_AP_UNO_SRW (PTE_EXT_AP0)
#define PTE_EXT_AP_URO_SRW (PTE_EXT_AP1)
#define PTE_EXT_AP_URW_SRW (PTE_EXT_AP1|PTE_EXT_AP0)
#define PTE_EXT_TEX(x) ((x) << 6) /* v5 */
#define PTE_EXT_APX (1 << 9) /* v6 */
#define PTE_EXT_SHARED (1 << 10) /* v6 */
#define PTE_EXT_NG (1 << 11) /* v6 */
/*
* - small page