1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Based on arm/arm64/include/asm/current.h
4 *
5 * Copyright (C) 2016 ARM
6 * Copyright (C) 2017 SiFive
7 */
8
9
10 #ifndef _ASM_RISCV_CURRENT_H
11 #define _ASM_RISCV_CURRENT_H
12
13 #include <linux/bug.h>
14 #include <linux/compiler.h>
15
16 #ifndef __ASSEMBLY__
17
18 struct task_struct;
19
20 register struct task_struct *riscv_current_is_tp __asm__("tp");
21
22 /*
23 * This only works because "struct thread_info" is at offset 0 from "struct
24 * task_struct". This constraint seems to be necessary on other architectures
25 * as well, but __switch_to enforces it. We can't check TASK_TI here because
26 * <asm/asm-offsets.h> includes this, and I can't get the definition of "struct
27 * task_struct" here due to some header ordering problems.
28 */
29 static __always_inline struct task_struct *get_current(void)
30 {
31 return riscv_current_is_tp;
32 }
33
34 #define current get_current()
35
36 register unsigned long current_stack_pointer __asm__("sp");
37
38 #endif /* __ASSEMBLY__ */
39
40 #endif /* _ASM_RISCV_CURRENT_H */
41
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