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authorRussell King <rmk+kernel@arm.linux.org.uk>2010-11-16 08:40:36 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-12-22 11:05:35 +0000
commit36bb94ba36f332de767cfaa3af6a5136435a3a9c (patch)
tree45d1bd890b58658f4db58a033e619e511e3368f4 /arch/arm/mm/proc-macros.S
parent9522d7e4cb5e0858122fc55d33a2c07728f0b10d (diff)
downloadlinux-36bb94ba36f332de767cfaa3af6a5136435a3a9c.tar.bz2
ARM: pgtable: provide RDONLY page table bit rather than WRITE bit
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/proc-macros.S')
-rw-r--r--arch/arm/mm/proc-macros.S16
1 files changed, 8 insertions, 8 deletions
diff --git a/arch/arm/mm/proc-macros.S b/arch/arm/mm/proc-macros.S
index 4a7a9e142e85..f5ca6aaecdbd 100644
--- a/arch/arm/mm/proc-macros.S
+++ b/arch/arm/mm/proc-macros.S
@@ -81,7 +81,7 @@
#if L_PTE_SHARED != PTE_EXT_SHARED
#error PTE shared bit mismatch
#endif
-#if (L_PTE_XN+L_PTE_USER+L_PTE_WRITE+L_PTE_DIRTY+L_PTE_YOUNG+\
+#if (L_PTE_XN+L_PTE_USER+L_PTE_RDONLY+L_PTE_DIRTY+L_PTE_YOUNG+\
L_PTE_FILE+L_PTE_PRESENT) > L_PTE_SHARED
#error Invalid Linux PTE bit settings
#endif
@@ -132,9 +132,9 @@
and r2, r1, #L_PTE_MT_MASK
ldr r2, [ip, r2]
- tst r1, #L_PTE_WRITE
- tstne r1, #L_PTE_DIRTY
- orreq r3, r3, #PTE_EXT_APX
+ eor r1, r1, #L_PTE_DIRTY
+ tst r1, #L_PTE_DIRTY|L_PTE_RDONLY
+ orrne r3, r3, #PTE_EXT_APX
tst r1, #L_PTE_USER
orrne r3, r3, #PTE_EXT_AP1
@@ -172,7 +172,7 @@
.macro armv3_set_pte_ext wc_disable=1
str r1, [r0], #2048 @ linux version
- eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
+ eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY
bic r2, r1, #PTE_SMALL_AP_MASK @ keep C, B bits
bic r2, r2, #PTE_TYPE_MASK
@@ -181,7 +181,7 @@
tst r3, #L_PTE_USER @ user?
orrne r2, r2, #PTE_SMALL_AP_URO_SRW
- tst r3, #L_PTE_WRITE | L_PTE_DIRTY @ write and dirty?
+ tst r3, #L_PTE_RDONLY | L_PTE_DIRTY @ write and dirty?
orreq r2, r2, #PTE_SMALL_AP_UNO_SRW
tst r3, #L_PTE_PRESENT | L_PTE_YOUNG @ present and young?
@@ -215,7 +215,7 @@
.macro xscale_set_pte_ext_prologue
str r1, [r0] @ linux version
- eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY
+ eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY
bic r2, r1, #PTE_SMALL_AP_MASK @ keep C, B bits
orr r2, r2, #PTE_TYPE_EXT @ extended page
@@ -223,7 +223,7 @@
tst r3, #L_PTE_USER @ user?
orrne r2, r2, #PTE_EXT_AP_URO_SRW @ yes -> user r/o, system r/w
- tst r3, #L_PTE_WRITE | L_PTE_DIRTY @ write and dirty?
+ tst r3, #L_PTE_RDONLY | L_PTE_DIRTY @ write and dirty?
orreq r2, r2, #PTE_EXT_AP_UNO_SRW @ yes -> user n/a, system r/w
@ combined with user -> user r/w
.endm