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| author | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-21 08:52:18 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-21 08:52:18 -0800 |
| commit | b05005772f34497eb2b7415a651fe785cbe70e16 (patch) | |
| tree | b176aeb7fa9baf69e77ddd83e844727490bfcf28 /include/asm-mips/interrupt.h | |
| parent | 044f324f6ea5d55391db62fca6a295b2651cb946 (diff) | |
| parent | 7705a8792b0fc82fd7d4dd923724606bbfd9fb20 (diff) | |
| download | blackbird-op-linux-b05005772f34497eb2b7415a651fe785cbe70e16.tar.gz blackbird-op-linux-b05005772f34497eb2b7415a651fe785cbe70e16.zip | |
Merge branch 'origin'
Conflicts:
Documentation/video4linux/CARDLIST.cx88
drivers/media/video/cx88/Kconfig
drivers/media/video/em28xx/em28xx-video.c
drivers/media/video/saa7134/saa7134-dvb.c
Resolved as in the original merge by Mauro Carvalho Chehab
Diffstat (limited to 'include/asm-mips/interrupt.h')
| -rw-r--r-- | include/asm-mips/interrupt.h | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/include/asm-mips/interrupt.h b/include/asm-mips/interrupt.h index abdf54ee64cf..774348734fa0 100644 --- a/include/asm-mips/interrupt.h +++ b/include/asm-mips/interrupt.h @@ -47,6 +47,17 @@ static inline void local_irq_enable(void) * R4000/R4400 need three nops, the R4600 two nops and the R10000 needs * no nops at all. */ +/* + * For TX49, operating only IE bit is not enough. + * + * If mfc0 $12 follows store and the mfc0 is last instruction of a + * page and fetching the next instruction causes TLB miss, the result + * of the mfc0 might wrongly contain EXL bit. + * + * ERT-TX49H2-027, ERT-TX49H3-012, ERT-TX49HL3-006, ERT-TX49H4-008 + * + * Workaround: mask EXL bit of the result or place a nop before mfc0. + */ __asm__ ( " .macro local_irq_disable\n" " .set push \n" @@ -55,8 +66,8 @@ __asm__ ( " di \n" #else " mfc0 $1,$12 \n" - " ori $1,1 \n" - " xori $1,1 \n" + " ori $1,0x1f \n" + " xori $1,0x1f \n" " .set noreorder \n" " mtc0 $1,$12 \n" #endif @@ -96,8 +107,8 @@ __asm__ ( " andi \\result, 1 \n" #else " mfc0 \\result, $12 \n" - " ori $1, \\result, 1 \n" - " xori $1, 1 \n" + " ori $1, \\result, 0x1f \n" + " xori $1, 0x1f \n" " .set noreorder \n" " mtc0 $1, $12 \n" #endif @@ -114,6 +125,7 @@ __asm__ __volatile__( \ __asm__ ( " .macro local_irq_restore flags \n" + " .set push \n" " .set noreorder \n" " .set noat \n" #if defined(CONFIG_CPU_MIPSR2) && defined(CONFIG_IRQ_CPU) @@ -135,14 +147,13 @@ __asm__ ( #else " mfc0 $1, $12 \n" " andi \\flags, 1 \n" - " ori $1, 1 \n" - " xori $1, 1 \n" + " ori $1, 0x1f \n" + " xori $1, 0x1f \n" " or \\flags, $1 \n" " mtc0 \\flags, $12 \n" #endif " irq_disable_hazard \n" - " .set at \n" - " .set reorder \n" + " .set pop \n" " .endm \n"); #define local_irq_restore(flags) \ |
