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authorOlof Johansson <olof@lixom.net>2013-07-12 21:59:39 +0400
committerOlof Johansson <olof@lixom.net>2013-07-12 21:59:39 +0400
commitf4b96f5e4ff8d86699c851c10245e102809b0331 (patch)
treef766102263bed71738431cabb4d4f6f086005cd8 /arch/arc/mm/tlbex.S
parent9d8812df35be58a5da0c44182c1e4ba2507cc6a7 (diff)
parentc24a6ae18abde53b048372b066b93b71b1b91154 (diff)
downloadlinux-f4b96f5e4ff8d86699c851c10245e102809b0331.tar.xz
Merge tag 'omap-for-v3.11/fixes-for-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes
Omap fixes and minor defconfig updates that would be good to get in before -rc1. * tag 'omap-for-v3.11/fixes-for-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: ARM: OMAP2+: omap2plus_defconfig: Enable appended DTB support ARM: OMAP2+: Enable TI_EDMA in omap2plus_defconfig ARM: OMAP2+: omap2plus_defconfig: enable DRA752 thermal support by default ARM: OMAP2+: omap2plus_defconfig: enable TI bandgap driver ARM: OMAP2+: devices: remove duplicated include from devices.c ARM: OMAP3: igep0020: Set DSS pins in correct mux mode. ARM: OMAP2+: N900: enable N900-specific drivers even if device tree is enabled ARM: OMAP2+: Cocci spatch "ptr_ret.spatch" ARM: OMAP2+: Remove obsolete Makefile line ARM: OMAP5: Enable Cortex A15 errata 798181 ARM: scu: provide inline dummy functions when SCU is not present ARM: OMAP4: sleep: build OMAP4 specific functions only for OMAP4 ARM: OMAP2+: timer: initialize before using oh_name Signed-off-by: Olof Johansson <olof@lixom.net> Add/move/change conflicts in arch/arm/mach-omap2/Kconfig resolved.
Diffstat (limited to 'arch/arc/mm/tlbex.S')
-rw-r--r--arch/arc/mm/tlbex.S35
1 files changed, 12 insertions, 23 deletions
diff --git a/arch/arc/mm/tlbex.S b/arch/arc/mm/tlbex.S
index 3357d26ffe54..5c5bb23001b0 100644
--- a/arch/arc/mm/tlbex.S
+++ b/arch/arc/mm/tlbex.S
@@ -39,7 +39,7 @@
#include <linux/linkage.h>
#include <asm/entry.h>
-#include <asm/tlb.h>
+#include <asm/mmu.h>
#include <asm/pgtable.h>
#include <asm/arcregs.h>
#include <asm/cache.h>
@@ -147,9 +147,9 @@ ex_saved_reg1:
#ifdef CONFIG_ARC_DBG_TLB_MISS_COUNT
and.f 0, r0, _PAGE_PRESENT
bz 1f
- ld r2, [num_pte_not_present]
- add r2, r2, 1
- st r2, [num_pte_not_present]
+ ld r3, [num_pte_not_present]
+ add r3, r3, 1
+ st r3, [num_pte_not_present]
1:
#endif
@@ -271,22 +271,22 @@ ARC_ENTRY EV_TLBMissI
#endif
;----------------------------------------------------------------
- ; Get the PTE corresponding to V-addr accessed
+ ; Get the PTE corresponding to V-addr accessed, r2 is setup with EFA
LOAD_FAULT_PTE
;----------------------------------------------------------------
; VERIFY_PTE: Check if PTE permissions approp for executing code
cmp_s r2, VMALLOC_START
- mov.lo r2, (_PAGE_PRESENT | _PAGE_U_READ | _PAGE_U_EXECUTE)
- mov.hs r2, (_PAGE_PRESENT | _PAGE_K_READ | _PAGE_K_EXECUTE)
+ mov.lo r2, (_PAGE_PRESENT | _PAGE_U_EXECUTE)
+ mov.hs r2, (_PAGE_PRESENT | _PAGE_K_EXECUTE)
and r3, r0, r2 ; Mask out NON Flag bits from PTE
xor.f r3, r3, r2 ; check ( ( pte & flags_test ) == flags_test )
bnz do_slow_path_pf
; Let Linux VM know that the page was accessed
- or r0, r0, (_PAGE_PRESENT | _PAGE_ACCESSED) ; set Accessed Bit
- st_s r0, [r1] ; Write back PTE
+ or r0, r0, _PAGE_ACCESSED ; set Accessed Bit
+ st_s r0, [r1] ; Write back PTE
CONV_PTE_TO_TLB
COMMIT_ENTRY_TO_MMU
@@ -311,7 +311,7 @@ ARC_ENTRY EV_TLBMissD
;----------------------------------------------------------------
; Get the PTE corresponding to V-addr accessed
- ; If PTE exists, it will setup, r0 = PTE, r1 = Ptr to PTE
+ ; If PTE exists, it will setup, r0 = PTE, r1 = Ptr to PTE, r2 = EFA
LOAD_FAULT_PTE
;----------------------------------------------------------------
@@ -345,7 +345,7 @@ ARC_ENTRY EV_TLBMissD
;----------------------------------------------------------------
; UPDATE_PTE: Let Linux VM know that page was accessed/dirty
lr r3, [ecr]
- or r0, r0, (_PAGE_PRESENT | _PAGE_ACCESSED) ; Accessed bit always
+ 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
st_s r0, [r1] ; Write back PTE
@@ -381,18 +381,7 @@ do_slow_path_pf:
; ------- setup args for Linux Page fault Hanlder ---------
mov_s r0, sp
- lr r2, [efa]
- lr r3, [ecr]
-
- ; Both st and ex imply WRITE access of some sort, hence do_page_fault( )
- ; invoked with write=1 for DTLB-st/ex Miss and write=0 for ITLB miss or
- ; DTLB-ld Miss
- ; DTLB Miss Cause code is ld = 0x01 , st = 0x02, ex = 0x03
- ; Following code uses that fact that st/ex have one bit in common
-
- btst_s r3, ECR_C_BIT_DTLB_ST_MISS
- mov.z r1, 0
- mov.nz r1, 1
+ lr r1, [efa]
; We don't want exceptions to be disabled while the fault is handled.
; Now that we have saved the context we return from exception hence