diff options
| -rw-r--r-- | include/asm-mips/interrupt.h | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/include/asm-mips/interrupt.h b/include/asm-mips/interrupt.h index 0da5818a2d62..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) | |||
| 47 | * R4000/R4400 need three nops, the R4600 two nops and the R10000 needs | 47 | * R4000/R4400 need three nops, the R4600 two nops and the R10000 needs |
| 48 | * no nops at all. | 48 | * no nops at all. |
| 49 | */ | 49 | */ |
| 50 | /* | ||
| 51 | * For TX49, operating only IE bit is not enough. | ||
| 52 | * | ||
| 53 | * If mfc0 $12 follows store and the mfc0 is last instruction of a | ||
| 54 | * page and fetching the next instruction causes TLB miss, the result | ||
| 55 | * of the mfc0 might wrongly contain EXL bit. | ||
| 56 | * | ||
| 57 | * ERT-TX49H2-027, ERT-TX49H3-012, ERT-TX49HL3-006, ERT-TX49H4-008 | ||
| 58 | * | ||
| 59 | * Workaround: mask EXL bit of the result or place a nop before mfc0. | ||
| 60 | */ | ||
| 50 | __asm__ ( | 61 | __asm__ ( |
| 51 | " .macro local_irq_disable\n" | 62 | " .macro local_irq_disable\n" |
| 52 | " .set push \n" | 63 | " .set push \n" |
| @@ -55,8 +66,8 @@ __asm__ ( | |||
| 55 | " di \n" | 66 | " di \n" |
| 56 | #else | 67 | #else |
| 57 | " mfc0 $1,$12 \n" | 68 | " mfc0 $1,$12 \n" |
| 58 | " ori $1,1 \n" | 69 | " ori $1,0x1f \n" |
| 59 | " xori $1,1 \n" | 70 | " xori $1,0x1f \n" |
| 60 | " .set noreorder \n" | 71 | " .set noreorder \n" |
| 61 | " mtc0 $1,$12 \n" | 72 | " mtc0 $1,$12 \n" |
| 62 | #endif | 73 | #endif |
| @@ -96,8 +107,8 @@ __asm__ ( | |||
| 96 | " andi \\result, 1 \n" | 107 | " andi \\result, 1 \n" |
| 97 | #else | 108 | #else |
| 98 | " mfc0 \\result, $12 \n" | 109 | " mfc0 \\result, $12 \n" |
| 99 | " ori $1, \\result, 1 \n" | 110 | " ori $1, \\result, 0x1f \n" |
| 100 | " xori $1, 1 \n" | 111 | " xori $1, 0x1f \n" |
| 101 | " .set noreorder \n" | 112 | " .set noreorder \n" |
| 102 | " mtc0 $1, $12 \n" | 113 | " mtc0 $1, $12 \n" |
| 103 | #endif | 114 | #endif |
| @@ -136,8 +147,8 @@ __asm__ ( | |||
| 136 | #else | 147 | #else |
| 137 | " mfc0 $1, $12 \n" | 148 | " mfc0 $1, $12 \n" |
| 138 | " andi \\flags, 1 \n" | 149 | " andi \\flags, 1 \n" |
| 139 | " ori $1, 1 \n" | 150 | " ori $1, 0x1f \n" |
| 140 | " xori $1, 1 \n" | 151 | " xori $1, 0x1f \n" |
| 141 | " or \\flags, $1 \n" | 152 | " or \\flags, $1 \n" |
| 142 | " mtc0 \\flags, $12 \n" | 153 | " mtc0 \\flags, $12 \n" |
| 143 | #endif | 154 | #endif |