projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 522e6ee3 | 1 | /* Low-level functions for atomic operations. Nios II version. |
| 04277e02 | 2 | Copyright (C) 2012-2019 Free Software Foundation, Inc. |
| 522e6ee3 CLT |
3 | This file is part of the GNU C Library. |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9 | ||
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Lesser General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| 16 | License along with the GNU C Library. If not, see | |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| 18 | ||
| de071d19 JM |
19 | #ifndef _NIOS2_ATOMIC_MACHINE_H |
| 20 | #define _NIOS2_ATOMIC_MACHINE_H 1 | |
| 522e6ee3 CLT |
21 | |
| 22 | #include <stdint.h> | |
| 23 | ||
| 24 | typedef int32_t atomic32_t; | |
| 25 | typedef uint32_t uatomic32_t; | |
| 26 | typedef int_fast32_t atomic_fast32_t; | |
| 27 | typedef uint_fast32_t uatomic_fast32_t; | |
| 28 | ||
| 29 | typedef intptr_t atomicptr_t; | |
| 30 | typedef uintptr_t uatomicptr_t; | |
| 31 | typedef intmax_t atomic_max_t; | |
| 32 | typedef uintmax_t uatomic_max_t; | |
| 33 | ||
| 34 | #define __HAVE_64B_ATOMICS 0 | |
| 35 | #define USE_ATOMIC_COMPILER_BUILTINS 0 | |
| 36 | ||
| 12d2dd70 SL |
37 | /* XXX Is this actually correct? */ |
| 38 | #define ATOMIC_EXCHANGE_USES_CAS 1 | |
| 39 | ||
| 522e6ee3 CLT |
40 | #define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \ |
| 41 | (abort (), (__typeof (*mem)) 0) | |
| 42 | #define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \ | |
| 43 | (abort (), (__typeof (*mem)) 0) | |
| 44 | #define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \ | |
| 45 | (abort (), (__typeof (*mem)) 0) | |
| 46 | ||
| 47 | #define __arch_compare_and_exchange_bool_8_acq(mem, newval, oldval) \ | |
| 48 | (abort (), 0) | |
| 49 | #define __arch_compare_and_exchange_bool_16_acq(mem, newval, oldval) \ | |
| 50 | (abort (), 0) | |
| 51 | #define __arch_compare_and_exchange_bool_64_acq(mem, newval, oldval) \ | |
| 52 | (abort (), 0) | |
| 53 | ||
| 54 | #define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \ | |
| 55 | ({ \ | |
| 56 | register int r2 asm ("r2"); \ | |
| 57 | register int* r4 asm ("r4") = (int*)(mem); \ | |
| 58 | register int r5 asm ("r5"); \ | |
| 59 | register int r6 asm ("r6") = (int)(newval); \ | |
| 60 | int retval, orig_oldval = (int)(oldval); \ | |
| 61 | long kernel_cmpxchg = 0x1004; \ | |
| 62 | while (1) \ | |
| 63 | { \ | |
| 64 | r5 = *r4; \ | |
| 65 | if (r5 != orig_oldval) \ | |
| 66 | { \ | |
| 67 | retval = r5; \ | |
| 68 | break; \ | |
| 69 | } \ | |
| 70 | asm volatile ("callr %1\n" \ | |
| 71 | : "=r" (r2) \ | |
| 72 | : "r" (kernel_cmpxchg), "r" (r4), "r" (r5), "r" (r6) \ | |
| 73 | : "ra", "memory"); \ | |
| 74 | if (!r2) { retval = orig_oldval; break; } \ | |
| 75 | } \ | |
| 76 | (__typeof (*(mem))) retval; \ | |
| 77 | }) | |
| 78 | ||
| 79 | #define __arch_compare_and_exchange_bool_32_acq(mem, newval, oldval) \ | |
| 80 | ({ \ | |
| 81 | register int r2 asm ("r2"); \ | |
| 82 | register int *r4 asm ("r4") = (int*)(mem); \ | |
| 83 | register int r5 asm ("r5") = (int)(oldval); \ | |
| 84 | register int r6 asm ("r6") = (int)(newval); \ | |
| 85 | long kernel_cmpxchg = 0x1004; \ | |
| 86 | asm volatile ("callr %1\n" \ | |
| 87 | : "=r" (r2) \ | |
| 88 | : "r" (kernel_cmpxchg), "r" (r4), "r" (r5), "r" (r6) \ | |
| 89 | : "ra", "memory"); \ | |
| 90 | r2; \ | |
| 91 | }) | |
| 92 | ||
| 93 | #define atomic_full_barrier() ({ asm volatile ("sync"); }) | |
| 94 | ||
| de071d19 | 95 | #endif /* _NIOS2_ATOMIC_MACHINE_H */ |