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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/* $Id: processor.h,v 1.80 2000/12/31 10:05:43 davem Exp $
* include/asm-sparc/processor.h
*
* Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu)
*/
#ifndef __ASM_SPARC_PROCESSOR_H
#define __ASM_SPARC_PROCESSOR_H
/*
* Sparc32 implementation of macro that returns current
* instruction pointer ("program counter").
*/
#define current_text_addr() ({ void *pc; __asm__("sethi %%hi(1f), %0; or %0, %%lo(1f), %0;\n1:" : "=r" (pc)); pc; })
#include <linux/a.out.h>
#include <asm/psr.h>
#include <asm/ptrace.h>
#include <asm/head.h>
#include <asm/signal.h>
#include <asm/segment.h>
#include <asm/btfixup.h>
#include <asm/page.h>
#include <asm/atomic.h>
/*
* Bus types
*/
#define EISA_bus 0
#define EISA_bus__is_a_macro /* for versions in ksyms.c */
#define MCA_bus 0
#define MCA_bus__is_a_macro /* for versions in ksyms.c */
/*
* The sparc has no problems with write protection
*/
#define wp_works_ok 1
#define wp_works_ok__is_a_macro /* for versions in ksyms.c */
/* Whee, this is STACK_TOP + PAGE_SIZE and the lowest kernel address too...
* That one page is used to protect kernel from intruders, so that
* we can make our access_ok test faster
*/
#define TASK_SIZE PAGE_OFFSET
struct fpq {
unsigned long *insn_addr;
unsigned long insn;
};
typedef struct {
int seg;
} mm_segment_t;
/* The Sparc processor specific thread struct. */
struct thread_struct {
unsigned long uwinmask __attribute__ ((aligned (8)));
struct pt_regs *kregs;
/* Context switch saved kernel state. */
unsigned long ksp __attribute__ ((aligned (8)));
unsigned long kpc;
unsigned long kpsr;
unsigned long kwim;
/* Special child fork kpsr/kwim values. */
unsigned long fork_kpsr __attribute__ ((aligned (8)));
unsigned long fork_kwim;
/* A place to store user windows and stack pointers
* when the stack needs inspection.
*/
#define NSWINS 8
struct reg_window reg_window[NSWINS] __attribute__ ((aligned (8)));
unsigned long rwbuf_stkptrs[NSWINS] __attribute__ ((aligned (8)));
unsigned long w_saved;
/* Floating point regs */
unsigned long float_regs[32] __attribute__ ((aligned (8)));
unsigned long fsr;
unsigned long fpqdepth;
struct fpq fpqueue[16];
unsigned long flags;
mm_segment_t current_ds;
struct exec core_exec; /* just what it says. */
int new_signal;
atomic_t refcount; /* used for sun4c only */
};
#define SPARC_FLAG_KTHREAD 0x1 /* task is a kernel thread */
#define SPARC_FLAG_UNALIGNED 0x2 /* is allowed to do unaligned accesses */
#define SPARC_FLAG_MMAPSHARED 0x4 /* task wants a shared mmap */
#define INIT_MMAP { &init_mm, (0), (0), \
NULL, __pgprot(0x0) , VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }
#define INIT_THREAD { \
/* uwinmask, kregs, ksp, kpc, kpsr, kwim */ \
0, 0, 0, 0, 0, 0, \
/* fork_kpsr, fork_kwim */ \
0, 0, \
/* reg_window */ \
{ { { 0, }, { 0, } }, }, \
/* rwbuf_stkptrs */ \
{ 0, 0, 0, 0, 0, 0, 0, 0, }, \
/* w_saved */ \
0, \
/* FPU regs */ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, \
/* FPU status, FPU qdepth, FPU queue */ \
0, 0, { { 0, 0, }, }, \
/* flags, current_ds, */ \
SPARC_FLAG_KTHREAD, KERNEL_DS, \
/* core_exec */ \
{ 0, }, \
/* new_signal */ \
0, \
}
/* Return saved PC of a blocked thread. */
extern __inline__ unsigned long thread_saved_pc(struct thread_struct *t)
{
return t->kpc;
}
/* Do necessary setup to start up a newly executed thread. */
extern __inline__ void start_thread(struct pt_regs * regs, unsigned long pc,
unsigned long sp)
{
register unsigned long zero asm("g1");
regs->psr = (regs->psr & (PSR_CWP)) | PSR_S;
regs->pc = ((pc & (~3)) - 4);
regs->npc = regs->pc + 4;
regs->y = 0;
zero = 0;
__asm__ __volatile__("std\t%%g0, [%0 + %3 + 0x00]\n\t"
"std\t%%g0, [%0 + %3 + 0x08]\n\t"
"std\t%%g0, [%0 + %3 + 0x10]\n\t"
"std\t%%g0, [%0 + %3 + 0x18]\n\t"
"std\t%%g0, [%0 + %3 + 0x20]\n\t"
"std\t%%g0, [%0 + %3 + 0x28]\n\t"
"std\t%%g0, [%0 + %3 + 0x30]\n\t"
"st\t%1, [%0 + %3 + 0x38]\n\t"
"st\t%%g0, [%0 + %3 + 0x3c]"
: : "r" (regs), "r" (sp - REGWIN_SZ), "r" (zero),
"i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0])));
}
/* Free all resources held by a thread. */
#define release_thread(tsk) do { } while(0)
extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
#define copy_segments(tsk, mm) do { } while (0)
#define release_segments(mm) do { } while (0)
#define get_wchan(__TSK) \
({ extern void scheduling_functions_start_here(void); \
extern void scheduling_functions_end_here(void); \
unsigned long pc, fp, bias = 0; \
unsigned long task_base = (unsigned long) (__TSK); \
unsigned long __ret = 0; \
struct reg_window *rw; \
int count = 0; \
if (!(__TSK) || (__TSK) == current || \
(__TSK)->state == TASK_RUNNING) \
goto __out; \
fp = (__TSK)->thread.ksp + bias; \
do { \
/* Bogus frame pointer? */ \
if (fp < (task_base + sizeof(struct task_struct)) || \
fp >= (task_base + (2 * PAGE_SIZE))) \
break; \
rw = (struct reg_window *) fp; \
pc = rw->ins[7]; \
if (pc < ((unsigned long) scheduling_functions_start_here) || \
pc >= ((unsigned long) scheduling_functions_end_here)) { \
__ret = pc; \
goto __out; \
} \
fp = rw->ins[6] + bias; \
} while (++count < 16); \
__out: __ret; \
})
#define KSTK_EIP(tsk) ((tsk)->thread.kregs->pc)
#define KSTK_ESP(tsk) ((tsk)->thread.kregs->u_regs[UREG_FP])
#ifdef __KERNEL__
#define THREAD_SIZE (2*PAGE_SIZE)
extern struct task_struct *last_task_used_math;
/* Allocation and freeing of basic task resources. */
BTFIXUPDEF_CALL(struct task_struct *, alloc_task_struct, void)
BTFIXUPDEF_CALL(void, free_task_struct, struct task_struct *)
BTFIXUPDEF_CALL(void, get_task_struct, struct task_struct *)
#define alloc_task_struct() BTFIXUP_CALL(alloc_task_struct)()
#define free_task_struct(tsk) BTFIXUP_CALL(free_task_struct)(tsk)
#define get_task_struct(tsk) BTFIXUP_CALL(get_task_struct)(tsk)
#define init_task (init_task_union.task)
#define init_stack (init_task_union.stack)
#endif
#endif /* __ASM_SPARC_PROCESSOR_H */
|
