projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 05490626 RB |
1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public | |
| 3 | * License. See the file "COPYING" in the main directory of this archive | |
| 4 | * for more details. | |
| 5 | * | |
| 6 | * Macros for 32/64-bit neutral inline assembler | |
| 7 | */ | |
| 8 | ||
| 9 | #ifndef __ASM_LLSC_H | |
| 10 | #define __ASM_LLSC_H | |
| 11 | ||
| ef85d057 PB |
12 | #include <asm/isa-rev.h> |
| 13 | ||
| 05490626 | 14 | #if _MIPS_SZLONG == 32 |
| 05490626 RB |
15 | #define __LL "ll " |
| 16 | #define __SC "sc " | |
| 17 | #define __INS "ins " | |
| 18 | #define __EXT "ext " | |
| 19 | #elif _MIPS_SZLONG == 64 | |
| 05490626 RB |
20 | #define __LL "lld " |
| 21 | #define __SC "scd " | |
| 22 | #define __INS "dins " | |
| 23 | #define __EXT "dext " | |
| 24 | #endif | |
| 25 | ||
| 878f75c7 PB |
26 | /* |
| 27 | * Using a branch-likely instruction to check the result of an sc instruction | |
| 28 | * works around a bug present in R10000 CPUs prior to revision 3.0 that could | |
| 29 | * cause ll-sc sequences to execute non-atomically. | |
| 30 | */ | |
| 31 | #if R10000_LLSC_WAR | |
| 32 | # define __SC_BEQZ "beqzl " | |
| ef85d057 PB |
33 | #elif MIPS_ISA_REV >= 6 |
| 34 | # define __SC_BEQZ "beqzc " | |
| 878f75c7 PB |
35 | #else |
| 36 | # define __SC_BEQZ "beqz " | |
| 37 | #endif | |
| 38 | ||
| 05490626 | 39 | #endif /* __ASM_LLSC_H */ |