Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Guo Ren | 132 | 93.62% | 4 | 66.67% |
Paul E. McKenney | 6 | 4.26% | 1 | 16.67% |
Mark Rutland | 3 | 2.13% | 1 | 16.67% |
Total | 141 | 6 |
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ASM_CSKY_CMPXCHG_H #define __ASM_CSKY_CMPXCHG_H #ifdef CONFIG_SMP #include <linux/bug.h> #include <asm/barrier.h> #include <linux/cmpxchg-emu.h> #define __xchg_relaxed(new, ptr, size) \ ({ \ __typeof__(ptr) __ptr = (ptr); \ __typeof__(new) __new = (new); \ __typeof__(*(ptr)) __ret; \ unsigned long tmp; \ switch (size) { \ case 2: { \ u32 ret; \ u32 shif = ((ulong)__ptr & 2) ? 16 : 0; \ u32 mask = 0xffff << shif; \ __ptr = (__typeof__(ptr))((ulong)__ptr & ~2); \ __asm__ __volatile__ ( \ "1: ldex.w %0, (%4)\n" \ " and %1, %0, %2\n" \ " or %1, %1, %3\n" \ " stex.w %1, (%4)\n" \ " bez %1, 1b\n" \ : "=&r" (ret), "=&r" (tmp) \ : "r" (~mask), \ "r" ((u32)__new << shif), \ "r" (__ptr) \ : "memory"); \ __ret = (__typeof__(*(ptr))) \ ((ret & mask) >> shif); \ break; \ } \ case 4: \ asm volatile ( \ "1: ldex.w %0, (%3) \n" \ " mov %1, %2 \n" \ " stex.w %1, (%3) \n" \ " bez %1, 1b \n" \ : "=&r" (__ret), "=&r" (tmp) \ : "r" (__new), "r"(__ptr) \ :); \ break; \ default: \ BUILD_BUG(); \ } \ __ret; \ }) #define arch_xchg_relaxed(ptr, x) \ (__xchg_relaxed((x), (ptr), sizeof(*(ptr)))) #define __cmpxchg_relaxed(ptr, old, new, size) \ ({ \ __typeof__(ptr) __ptr = (ptr); \ __typeof__(new) __new = (new); \ __typeof__(new) __tmp; \ __typeof__(old) __old = (old); \ __typeof__(*(ptr)) __ret; \ switch (size) { \ case 1: \ __ret = (__typeof__(*(ptr)))cmpxchg_emu_u8((volatile u8 *)__ptr, (uintptr_t)__old, (uintptr_t)__new); \ break; \ case 4: \ asm volatile ( \ "1: ldex.w %0, (%3) \n" \ " cmpne %0, %4 \n" \ " bt 2f \n" \ " mov %1, %2 \n" \ " stex.w %1, (%3) \n" \ " bez %1, 1b \n" \ "2: \n" \ : "=&r" (__ret), "=&r" (__tmp) \ : "r" (__new), "r"(__ptr), "r"(__old) \ :); \ break; \ default: \ BUILD_BUG(); \ } \ __ret; \ }) #define arch_cmpxchg_relaxed(ptr, o, n) \ (__cmpxchg_relaxed((ptr), (o), (n), sizeof(*(ptr)))) #define __cmpxchg_acquire(ptr, old, new, size) \ ({ \ __typeof__(ptr) __ptr = (ptr); \ __typeof__(new) __new = (new); \ __typeof__(new) __tmp; \ __typeof__(old) __old = (old); \ __typeof__(*(ptr)) __ret; \ switch (size) { \ case 1: \ __ret = (__typeof__(*(ptr)))cmpxchg_emu_u8((volatile u8 *)__ptr, (uintptr_t)__old, (uintptr_t)__new); \ break; \ case 4: \ asm volatile ( \ "1: ldex.w %0, (%3) \n" \ " cmpne %0, %4 \n" \ " bt 2f \n" \ " mov %1, %2 \n" \ " stex.w %1, (%3) \n" \ " bez %1, 1b \n" \ ACQUIRE_FENCE \ "2: \n" \ : "=&r" (__ret), "=&r" (__tmp) \ : "r" (__new), "r"(__ptr), "r"(__old) \ :); \ break; \ default: \ BUILD_BUG(); \ } \ __ret; \ }) #define arch_cmpxchg_acquire(ptr, o, n) \ (__cmpxchg_acquire((ptr), (o), (n), sizeof(*(ptr)))) #define __cmpxchg(ptr, old, new, size) \ ({ \ __typeof__(ptr) __ptr = (ptr); \ __typeof__(new) __new = (new); \ __typeof__(new) __tmp; \ __typeof__(old) __old = (old); \ __typeof__(*(ptr)) __ret; \ switch (size) { \ case 1: \ __ret = (__typeof__(*(ptr)))cmpxchg_emu_u8((volatile u8 *)__ptr, (uintptr_t)__old, (uintptr_t)__new); \ break; \ case 4: \ asm volatile ( \ RELEASE_FENCE \ "1: ldex.w %0, (%3) \n" \ " cmpne %0, %4 \n" \ " bt 2f \n" \ " mov %1, %2 \n" \ " stex.w %1, (%3) \n" \ " bez %1, 1b \n" \ FULL_FENCE \ "2: \n" \ : "=&r" (__ret), "=&r" (__tmp) \ : "r" (__new), "r"(__ptr), "r"(__old) \ :); \ break; \ default: \ BUILD_BUG(); \ } \ __ret; \ }) #define arch_cmpxchg(ptr, o, n) \ (__cmpxchg((ptr), (o), (n), sizeof(*(ptr)))) #define arch_cmpxchg_local(ptr, o, n) \ (__cmpxchg_relaxed((ptr), (o), (n), sizeof(*(ptr)))) #else #include <asm-generic/cmpxchg.h> #endif #endif /* __ASM_CSKY_CMPXCHG_H */
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