1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/*
* include/asm-h8300/processor.h
*
* Copyright (C) 2002 Yoshinori Sato
*
* Based on: linux/asm-m68nommu/processor.h
*
* Copyright (C) 1995 Hamish Macdonald
*/
#ifndef __ASM_H8300_PROCESSOR_H
#define __ASM_H8300_PROCESSOR_H
/*
* Default implementation of macro that returns current
* instruction pointer ("program counter").
*/
#define current_text_addr() ({ __label__ _l; _l: &&_l; })
#include <linux/compiler.h>
#include <asm/segment.h>
#include <asm/ptrace.h>
#include <asm/current.h>
static inline unsigned long rdusp(void)
{
extern unsigned int _sw_usp;
return _sw_usp;
}
static inline void wrusp(unsigned long usp)
{
extern unsigned int _sw_usp;
_sw_usp = usp;
}
/*
* User space process size: 3.75GB. This is hardcoded into a few places,
* so don't change it unless you know what you are doing.
*/
#define TASK_SIZE (0xFFFFFFFFUL)
#ifdef __KERNEL__
#define STACK_TOP TASK_SIZE
#define STACK_TOP_MAX STACK_TOP
#endif
/*
* This decides where the kernel will search for a free chunk of vm
* space during mmap's. We won't be using it
*/
#define TASK_UNMAPPED_BASE 0
struct thread_struct {
unsigned long ksp; /* kernel stack pointer */
unsigned long usp; /* user stack pointer */
unsigned long ccr; /* saved status register */
unsigned long esp0; /* points to SR of stack frame */
struct {
unsigned short *addr;
unsigned short inst;
} breakinfo;
};
#define INIT_THREAD { \
.ksp = sizeof(init_stack) + (unsigned long)init_stack, \
.usp = 0, \
.ccr = PS_S, \
.esp0 = 0, \
.breakinfo = { \
.addr = (unsigned short *)-1, \
.inst = 0 \
} \
}
/*
* Do necessary setup to start up a newly executed thread.
*
* pass the data segment into user programs if it exists,
* it can't hurt anything as far as I can tell
*/
#if defined(CONFIG_CPU_H8300H)
#define start_thread(_regs, _pc, _usp) \
do { \
(_regs)->pc = (_pc); \
(_regs)->ccr = 0x00; /* clear all flags */ \
(_regs)->er5 = current->mm->start_data; /* GOT base */ \
(_regs)->sp = ((unsigned long)(_usp)) - sizeof(unsigned long) * 3; \
} while (0)
#endif
#if defined(CONFIG_CPU_H8S)
#define start_thread(_regs, _pc, _usp) \
do { \
(_regs)->pc = (_pc); \
(_regs)->ccr = 0x00; /* clear kernel flag */ \
(_regs)->exr = 0x78; /* enable all interrupts */ \
(_regs)->er5 = current->mm->start_data; /* GOT base */ \
/* 14 = space for retaddr(4), vector(4), er0(4) and exr(2) on stack */ \
(_regs)->sp = ((unsigned long)(_usp)) - 14; \
} while (0)
#endif
/* Forward declaration, a strange C thing */
struct task_struct;
/* Free all resources held by a thread. */
static inline void release_thread(struct task_struct *dead_task)
{
}
/*
* Return saved PC of a blocked thread.
*/
unsigned long thread_saved_pc(struct task_struct *tsk);
unsigned long get_wchan(struct task_struct *p);
#define KSTK_EIP(tsk) \
({ \
unsigned long eip = 0; \
if ((tsk)->thread.esp0 > PAGE_SIZE && \
MAP_NR((tsk)->thread.esp0) < max_mapnr) \
eip = ((struct pt_regs *) (tsk)->thread.esp0)->pc; \
eip; })
#define KSTK_ESP(tsk) ((tsk) == current ? rdusp() : (tsk)->thread.usp)
#define cpu_relax() barrier()
#define cpu_relax_lowlatency() cpu_relax()
#define HARD_RESET_NOW() ({ \
local_irq_disable(); \
asm("jmp @@0"); \
})
#endif
|
