diff options
| author | Zhang Le <r0bertz@gentoo.org> | 2009-04-15 05:01:52 -0400 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2009-05-14 08:50:26 -0400 |
| commit | 5d57c31e5790d44905af0459a21086dbad167d26 (patch) | |
| tree | d834becb495bdba4d59d5ae46e96f566586b54cd /arch/mips | |
| parent | 6cec2a0ac57d2ebef495a46d7866ae86e8d0e508 (diff) | |
MIPS: Loongson 2 needs no hazard barriers.
Quoting from Loongson2FUserGuide.pdf:
5.22.1 Hazards
The processor detects most of the pipeline hazards in hardware, including
CP0 hazards and load hazards. No NOP instructions are required to correct
instruction sequences.
Signed-off-by: Zhang Le <r0bertz@gentoo.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/include/asm/hazards.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/mips/include/asm/hazards.h b/arch/mips/include/asm/hazards.h index a12d971db4f9..0eaf77ffbc4f 100644 --- a/arch/mips/include/asm/hazards.h +++ b/arch/mips/include/asm/hazards.h | |||
| @@ -138,8 +138,9 @@ do { \ | |||
| 138 | __instruction_hazard(); \ | 138 | __instruction_hazard(); \ |
| 139 | } while (0) | 139 | } while (0) |
| 140 | 140 | ||
| 141 | #elif defined(CONFIG_CPU_R10000) || defined(CONFIG_CPU_CAVIUM_OCTEON) || \ | 141 | #elif defined(CONFIG_MACH_ALCHEMY) || defined(CONFIG_CPU_CAVIUM_OCTEON) || \ |
| 142 | defined(CONFIG_CPU_R5500) || defined(CONFIG_MACH_ALCHEMY) | 142 | defined(CONFIG_CPU_LOONGSON2) || defined(CONFIG_CPU_R10000) || \ |
| 143 | defined(CONFIG_CPU_R5500) | ||
| 143 | 144 | ||
| 144 | /* | 145 | /* |
| 145 | * R10000 rocks - all hazards handled in hardware, so this becomes a nobrainer. | 146 | * R10000 rocks - all hazards handled in hardware, so this becomes a nobrainer. |