projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1965aae3 PA |
1 | #ifndef _ASM_X86_RWLOCK_H |
| 2 | #define _ASM_X86_RWLOCK_H | |
| 003a46cf | 3 | |
| a750036f JB |
4 | #include <asm/asm.h> |
| 5 | ||
| 6 | #if CONFIG_NR_CPUS <= 2048 | |
| 7 | ||
| 8 | #ifndef __ASSEMBLY__ | |
| 9 | typedef union { | |
| 10 | s32 lock; | |
| 11 | s32 write; | |
| 12 | } arch_rwlock_t; | |
| 13 | #endif | |
| 14 | ||
| 15 | #define RW_LOCK_BIAS 0x00100000 | |
| 16 | #define READ_LOCK_SIZE(insn) __ASM_FORM(insn##l) | |
| 17 | #define READ_LOCK_ATOMIC(n) atomic_##n | |
| 18 | #define WRITE_LOCK_ADD(n) __ASM_FORM_COMMA(addl n) | |
| 19 | #define WRITE_LOCK_SUB(n) __ASM_FORM_COMMA(subl n) | |
| 20 | #define WRITE_LOCK_CMP RW_LOCK_BIAS | |
| 21 | ||
| 22 | #else /* CONFIG_NR_CPUS > 2048 */ | |
| 23 | ||
| 24 | #include <linux/const.h> | |
| 25 | ||
| 26 | #ifndef __ASSEMBLY__ | |
| 27 | typedef union { | |
| 28 | s64 lock; | |
| 29 | struct { | |
| 30 | u32 read; | |
| 31 | s32 write; | |
| 32 | }; | |
| 33 | } arch_rwlock_t; | |
| 34 | #endif | |
| 35 | ||
| 36 | #define RW_LOCK_BIAS (_AC(1,L) << 32) | |
| 37 | #define READ_LOCK_SIZE(insn) __ASM_FORM(insn##q) | |
| 38 | #define READ_LOCK_ATOMIC(n) atomic64_##n | |
| 39 | #define WRITE_LOCK_ADD(n) __ASM_FORM(incl) | |
| 40 | #define WRITE_LOCK_SUB(n) __ASM_FORM(decl) | |
| 41 | #define WRITE_LOCK_CMP 1 | |
| 42 | ||
| 43 | #endif /* CONFIG_NR_CPUS */ | |
| 44 | ||
| 45 | #define __ARCH_RW_LOCK_UNLOCKED { RW_LOCK_BIAS } | |
| 003a46cf TG |
46 | |
| 47 | /* Actual code is in asm/spinlock.h or in arch/x86/lib/rwlock.S */ | |
| 48 | ||
| 1965aae3 | 49 | #endif /* _ASM_X86_RWLOCK_H */ |