Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * linux/arch/unicore32/include/asm/processor.h
4 *
5 * Code specific to PKUnity SoC and UniCore ISA
6 *
7 * Copyright (C) 2001-2010 GUAN Xue-tao
8 */
9
10#ifndef __UNICORE_PROCESSOR_H__
11#define __UNICORE_PROCESSOR_H__
12
13#ifdef __KERNEL__
14
15#include <asm/ptrace.h>
16#include <asm/types.h>
17
18#ifdef __KERNEL__
19#define STACK_TOP TASK_SIZE
20#define STACK_TOP_MAX TASK_SIZE
21#endif
22
23struct debug_entry {
24 u32 address;
25 u32 insn;
26};
27
28struct debug_info {
29 int nsaved;
30 struct debug_entry bp[2];
31};
32
33struct thread_struct {
34 /* fault info */
35 unsigned long address;
36 unsigned long trap_no;
37 unsigned long error_code;
38 /* debugging */
39 struct debug_info debug;
40};
41
42#define INIT_THREAD { }
43
44#define start_thread(regs, pc, sp) \
45({ \
46 unsigned long *stack = (unsigned long *)sp; \
47 memset(regs->uregs, 0, sizeof(regs->uregs)); \
48 regs->UCreg_asr = USER_MODE; \
49 regs->UCreg_pc = pc & ~1; /* pc */ \
50 regs->UCreg_sp = sp; /* sp */ \
51 regs->UCreg_02 = stack[2]; /* r2 (envp) */ \
52 regs->UCreg_01 = stack[1]; /* r1 (argv) */ \
53 regs->UCreg_00 = stack[0]; /* r0 (argc) */ \
54})
55
56/* Forward declaration, a strange C thing */
57struct task_struct;
58
59/* Free all resources held by a thread. */
60extern void release_thread(struct task_struct *);
61
62unsigned long get_wchan(struct task_struct *p);
63
64#define cpu_relax() barrier()
65
66#define task_pt_regs(p) \
67 ((struct pt_regs *)(THREAD_START_SP + task_stack_page(p)) - 1)
68
69#define KSTK_EIP(tsk) (task_pt_regs(tsk)->UCreg_pc)
70#define KSTK_ESP(tsk) (task_pt_regs(tsk)->UCreg_sp)
71
72#endif
73
74#endif /* __UNICORE_PROCESSOR_H__ */