1 /*
2 * Copyright (c) 2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #ifndef CO2_INT_H
17 #define CO2_INT_H
18
19 #include <stddef.h>
20 #include <stdint.h>
21
22 #ifdef __cplusplus
23 extern "C" {
24 #endif
25
26 #if defined(__aarch64__)
27 #define FFRT_REG_NR 22
28 #define FFRT_REG_LR 11
29 #define FFRT_REG_SP 13
30 #elif defined(__arm__)
31 #define FFRT_REG_NR 64
32 #define FFRT_REG_LR 1
33 #define FFRT_REG_SP 0
34 #elif defined(__x86_64__)
35 #define FFRT_REG_NR 8
36 #define FFRT_REG_LR 7
37 #define FFRT_REG_SP 6
38 #elif defined(__riscv) && __riscv_xlen == 64
39 // https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/riscv/bits/setjmp.h;h=5dd7fa0120ab37c9ec5c4a854792c0935b9eddc1;hb=HEAD
40 #if defined __riscv_float_abi_double
41 #define FFRT_REG_NR 26
42 #else
43 #define FFRT_REG_NR 14
44 #endif
45 #define FFRT_REG_LR 0
46 #define FFRT_REG_SP 13
47 #else
48 #error "Unsupported architecture"
49 #endif
50
51 struct co2_context {
52 uintptr_t regs[FFRT_REG_NR];
53 };
54
55 int co2_save_context(struct co2_context* ctx);
56
57 void co2_restore_context(struct co2_context* ctx);
58
co2_switch_context(struct co2_context * from,struct co2_context * to)59 static inline void co2_switch_context(struct co2_context* from, struct co2_context* to)
60 {
61 if (co2_save_context(from) == 0) {
62 co2_restore_context(to);
63 }
64 }
65
66 int co2_init_context(struct co2_context* ctx, void (*func)(void*), void* arg, void* stack, size_t stack_size);
67
68 #ifdef __cplusplus
69 }
70 #endif
71 #endif /* CO2_INT_H */
72