Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
1#ifndef _ASM_SCORE_PROCESSOR_H
2#define _ASM_SCORE_PROCESSOR_H
3
4#include <linux/cpumask.h>
5#include <linux/threads.h>
6
7#include <asm/segment.h>
8
9struct task_struct;
10
11/*
12 * System setup and hardware flags..
13 */
14extern void (*cpu_wait)(void);
15
16extern unsigned long thread_saved_pc(struct task_struct *tsk);
17extern void start_thread(struct pt_regs *regs,
18 unsigned long pc, unsigned long sp);
19extern unsigned long get_wchan(struct task_struct *p);
20
21/*
22 * Return current * instruction pointer ("program counter").
23 */
24#define current_text_addr() ({ __label__ _l; _l: &&_l; })
25
26#define cpu_relax() barrier()
27#define release_thread(thread) do {} while (0)
28
29/*
30 * User space process size: 2GB. This is hardcoded into a few places,
31 * so don't change it unless you know what you are doing.
32 */
33#define TASK_SIZE 0x7fff8000UL
34
35/*
36 * This decides where the kernel will search for a free chunk of vm
37 * space during mmap's.
38 */
39#define TASK_UNMAPPED_BASE ((TASK_SIZE / 3) & ~(PAGE_SIZE))
40
41#ifdef __KERNEL__
42#define STACK_TOP TASK_SIZE
43#define STACK_TOP_MAX TASK_SIZE
44#endif
45
46/*
47 * If you change thread_struct remember to change the #defines below too!
48 */
49struct thread_struct {
50 unsigned long reg0, reg2, reg3;
51 unsigned long reg12, reg13, reg14, reg15, reg16;
52 unsigned long reg17, reg18, reg19, reg20, reg21;
53
54 unsigned long cp0_psr;
55 unsigned long cp0_ema; /* Last user fault */
56 unsigned long cp0_badvaddr; /* Last user fault */
57 unsigned long cp0_baduaddr; /* Last kernel fault accessing USEG */
58 unsigned long error_code;
59 unsigned long trap_no;
60
61 unsigned long mflags;
62 unsigned long reg29;
63
64 unsigned long single_step;
65 unsigned long ss_nextcnt;
66
67 unsigned long insn1_type;
68 unsigned long addr1;
69 unsigned long insn1;
70
71 unsigned long insn2_type;
72 unsigned long addr2;
73 unsigned long insn2;
74
75 mm_segment_t current_ds;
76};
77
78#define INIT_THREAD { \
79 .reg0 = 0, \
80 .reg2 = 0, \
81 .reg3 = 0, \
82 .reg12 = 0, \
83 .reg13 = 0, \
84 .reg14 = 0, \
85 .reg15 = 0, \
86 .reg16 = 0, \
87 .reg17 = 0, \
88 .reg18 = 0, \
89 .reg19 = 0, \
90 .reg20 = 0, \
91 .reg21 = 0, \
92 .cp0_psr = 0, \
93 .error_code = 0, \
94 .trap_no = 0, \
95}
96
97#define kstk_tos(tsk) \
98 ((unsigned long)task_stack_page(tsk) + THREAD_SIZE - 32)
99#define task_pt_regs(tsk) ((struct pt_regs *)kstk_tos(tsk) - 1)
100
101#define KSTK_EIP(tsk) (task_pt_regs(tsk)->cp0_epc)
102#define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[29])
103
104#endif /* _ASM_SCORE_PROCESSOR_H */