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50acfb2b | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
7db91e57 PD |
2 | /* |
3 | * Copyright (C) 2012 Regents of the University of California | |
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4 | */ |
5 | ||
6 | #ifndef _ASM_RISCV_PROCESSOR_H | |
7 | #define _ASM_RISCV_PROCESSOR_H | |
8 | ||
9 | #include <linux/const.h> | |
10 | ||
ad5d1122 VC |
11 | #include <vdso/processor.h> |
12 | ||
7db91e57 PD |
13 | #include <asm/ptrace.h> |
14 | ||
15 | /* | |
16 | * This decides where the kernel will search for a free chunk of vm | |
17 | * space during mmap's. | |
18 | */ | |
ae662eec | 19 | #define TASK_UNMAPPED_BASE PAGE_ALIGN(TASK_SIZE / 3) |
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20 | |
21 | #define STACK_TOP TASK_SIZE | |
22 | #define STACK_TOP_MAX STACK_TOP | |
23 | #define STACK_ALIGN 16 | |
24 | ||
25 | #ifndef __ASSEMBLY__ | |
26 | ||
27 | struct task_struct; | |
28 | struct pt_regs; | |
29 | ||
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30 | /* CPU-specific state of a task */ |
31 | struct thread_struct { | |
32 | /* Callee-saved registers */ | |
33 | unsigned long ra; | |
34 | unsigned long sp; /* Kernel mode stack */ | |
35 | unsigned long s[12]; /* s[0]: frame pointer */ | |
36 | struct __riscv_d_ext_state fstate; | |
74784081 | 37 | unsigned long bad_cause; |
7db91e57 PD |
38 | }; |
39 | ||
40 | #define INIT_THREAD { \ | |
41 | .sp = sizeof(init_stack) + (long)&init_stack, \ | |
42 | } | |
43 | ||
44 | #define task_pt_regs(tsk) \ | |
45 | ((struct pt_regs *)(task_stack_page(tsk) + THREAD_SIZE \ | |
46 | - ALIGN(sizeof(struct pt_regs), STACK_ALIGN))) | |
47 | ||
a4c3733d | 48 | #define KSTK_EIP(tsk) (task_pt_regs(tsk)->epc) |
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49 | #define KSTK_ESP(tsk) (task_pt_regs(tsk)->sp) |
50 | ||
51 | ||
52 | /* Do necessary setup to start up a newly executed thread. */ | |
53 | extern void start_thread(struct pt_regs *regs, | |
54 | unsigned long pc, unsigned long sp); | |
55 | ||
56 | /* Free all resources held by a thread. */ | |
57 | static inline void release_thread(struct task_struct *dead_task) | |
58 | { | |
59 | } | |
60 | ||
61 | extern unsigned long get_wchan(struct task_struct *p); | |
62 | ||
63 | ||
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64 | static inline void wait_for_interrupt(void) |
65 | { | |
66 | __asm__ __volatile__ ("wfi"); | |
67 | } | |
68 | ||
69 | struct device_node; | |
b2f8cfa7 | 70 | int riscv_of_processor_hartid(struct device_node *node); |
d175d699 | 71 | int riscv_of_parent_hartid(struct device_node *node); |
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72 | |
73 | extern void riscv_fill_hwcap(void); | |
0d7588ab | 74 | extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src); |
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75 | |
76 | #endif /* __ASSEMBLY__ */ | |
77 | ||
78 | #endif /* _ASM_RISCV_PROCESSOR_H */ |