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 cpu_relax_lowlatency()        cpu_relax()
28#define release_thread(thread)	do {} while (0)
29
30/*
31 * User space process size: 2GB. This is hardcoded into a few places,
32 * so don't change it unless you know what you are doing.
33 */
34#define TASK_SIZE	0x7fff8000UL
35
36/*
37 * This decides where the kernel will search for a free chunk of vm
38 * space during mmap's.
39 */
40#define TASK_UNMAPPED_BASE	((TASK_SIZE / 3) & ~(PAGE_SIZE))
41
42#ifdef __KERNEL__
43#define STACK_TOP	TASK_SIZE
44#define STACK_TOP_MAX	TASK_SIZE
45#endif
46
47/*
48 * If you change thread_struct remember to change the #defines below too!
49 */
50struct thread_struct {
51	unsigned long reg0, reg2, reg3;
52	unsigned long reg12, reg13, reg14, reg15, reg16;
53	unsigned long reg17, reg18, reg19, reg20, reg21;
54
55	unsigned long cp0_psr;
56	unsigned long cp0_ema;		/* Last user fault */
57	unsigned long cp0_badvaddr;	/* Last user fault */
58	unsigned long cp0_baduaddr;	/* Last kernel fault accessing USEG */
59	unsigned long error_code;
60	unsigned long trap_no;
61
62	unsigned long mflags;
63	unsigned long reg29;
64
65	unsigned long single_step;
66	unsigned long ss_nextcnt;
67
68	unsigned long insn1_type;
69	unsigned long addr1;
70	unsigned long insn1;
71
72	unsigned long insn2_type;
73	unsigned long addr2;
74	unsigned long insn2;
75
76	mm_segment_t current_ds;
77};
78
79#define INIT_THREAD {						\
80	.reg0			= 0,				\
81	.reg2			= 0,				\
82	.reg3			= 0,				\
83	.reg12			= 0,				\
84	.reg13			= 0,				\
85	.reg14			= 0,				\
86	.reg15			= 0,				\
87	.reg16			= 0,				\
88	.reg17			= 0,				\
89	.reg18			= 0,				\
90	.reg19			= 0,				\
91	.reg20			= 0,				\
92	.reg21			= 0,				\
93	.cp0_psr		= 0,				\
94	.error_code		= 0,				\
95	.trap_no		= 0,				\
96}
97
98#define kstk_tos(tsk)		\
99	((unsigned long)task_stack_page(tsk) + THREAD_SIZE - 32)
100#define task_pt_regs(tsk)	((struct pt_regs *)kstk_tos(tsk) - 1)
101
102#define KSTK_EIP(tsk)		(task_pt_regs(tsk)->cp0_epc)
103#define KSTK_ESP(tsk)		(task_pt_regs(tsk)->regs[29])
104
105#endif /* _ASM_SCORE_PROCESSOR_H */
106