1// Copyright 2021 The Marl Authors.
2//
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// https://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#if defined(__riscv) && __riscv_xlen == 64
16
17#include "osfiber_asm_rv64.h"
18
19#include "marl/export.h"
20
21MARL_EXPORT
22void marl_fiber_trampoline(void (*target)(void*), void* arg) {
23 target(arg);
24}
25
26MARL_EXPORT
27void marl_fiber_set_target(struct marl_fiber_context* ctx,
28 void* stack,
29 uint32_t stack_size,
30 void (*target)(void*),
31 void* arg) {
32 uintptr_t* stack_top = (uintptr_t*)((uint8_t*)(stack) + stack_size);
33 ctx->ra = (uintptr_t)&marl_fiber_trampoline;
34 ctx->a0 = (uintptr_t)target;
35 ctx->a1 = (uintptr_t)arg;
36 ctx->sp = ((uintptr_t)stack_top) & ~(uintptr_t)15;
37}
38
39#endif // defined(__riscv) && __riscv_xlen == 64
40