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[ARM] Unuse another Linux PTE bit

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L_PTE_ASID is not really required to be stored in every PTE, since we
can identify it via the address passed to set_pte_at().  So, create
set_pte_ext() which takes the address of the PTE to set, the Linux
PTE value, and the additional CPU PTE bits which aren't encoded in
the Linux PTE value.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2006-12-13 14:34:43 +00:00
committed by Russell King
parent f06b97ffd1
commit ad1ae2fe7f
28 changed files with 84 additions and 84 deletions
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30
arch/arm/mm/proc-v6.S
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@@ -103,13 +103,14 @@ ENTRY(cpu_v6_switch_mm)
mov pc, lr
/*
* cpu_v6_set_pte(ptep, pte)
* cpu_v6_set_pte_ext(ptep, pte, ext)
*
* Set a level 2 translation table entry.
*
* - ptep - pointer to level 2 translation table entry
* (hardware version is stored at -1024 bytes)
* - pte - PTE value to store
* - ext - value for extended PTE bits
*
* Permissions:
* YUWD APX AP1 AP0 SVC User
@@ -121,33 +122,34 @@ ENTRY(cpu_v6_switch_mm)
* 11x0 0 1 0 r/w r/o
* 1111 0 1 1 r/w r/w
*/
ENTRY(cpu_v6_set_pte)
ENTRY(cpu_v6_set_pte_ext)
#ifdef CONFIG_MMU
str r1, [r0], #-2048 @ linux version
bic r2, r1, #0x000003f0
bic r2, r2, #0x00000003
orr r2, r2, #PTE_EXT_AP0 | 2
bic r3, r1, #0x000003f0
bic r3, r3, #0x00000003
orr r3, r3, r2
orr r3, r3, #PTE_EXT_AP0 | 2
tst r1, #L_PTE_WRITE
tstne r1, #L_PTE_DIRTY
orreq r2, r2, #PTE_EXT_APX
orreq r3, r3, #PTE_EXT_APX
tst r1, #L_PTE_USER
orrne r2, r2, #PTE_EXT_AP1
tstne r2, #PTE_EXT_APX
bicne r2, r2, #PTE_EXT_APX | PTE_EXT_AP0
orrne r3, r3, #PTE_EXT_AP1
tstne r3, #PTE_EXT_APX
bicne r3, r3, #PTE_EXT_APX | PTE_EXT_AP0
tst r1, #L_PTE_YOUNG
biceq r2, r2, #PTE_EXT_APX | PTE_EXT_AP_MASK
biceq r3, r3, #PTE_EXT_APX | PTE_EXT_AP_MASK
tst r1, #L_PTE_EXEC
orreq r2, r2, #PTE_EXT_XN
orreq r3, r3, #PTE_EXT_XN
tst r1, #L_PTE_PRESENT
moveq r2, #0
moveq r3, #0
str r2, [r0]
str r3, [r0]
mcr p15, 0, r0, c7, c10, 1 @ flush_pte
#endif
mov pc, lr
@@ -233,7 +235,7 @@ ENTRY(v6_processor_functions)
.word cpu_v6_do_idle
.word cpu_v6_dcache_clean_area
.word cpu_v6_switch_mm
.word cpu_v6_set_pte
.word cpu_v6_set_pte_ext
.size v6_processor_functions, . - v6_processor_functions
.type cpu_arch_name, #object