1#ifndef __ASM_SH_PROCESSOR_64_H
2#define __ASM_SH_PROCESSOR_64_H
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14
15#ifndef __ASSEMBLY__
16
17#include <linux/compiler.h>
18#include <asm/page.h>
19#include <asm/types.h>
20#include <asm/ptrace.h>
21#include <cpu/registers.h>
22
23
24
25
26
27#define current_text_addr() ({ \
28void *pc; \
29unsigned long long __dummy = 0; \
30__asm__("gettr tr0, %1\n\t" \
31 "pta 4, tr0\n\t" \
32 "gettr tr0, %0\n\t" \
33 "ptabs %1, tr0\n\t" \
34 :"=r" (pc), "=r" (__dummy) \
35 : "1" (__dummy)); \
36pc; })
37
38#endif
39
40
41
42
43#define TASK_SIZE 0x7ffff000UL
44
45#define STACK_TOP TASK_SIZE
46#define STACK_TOP_MAX STACK_TOP
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48
49
50
51#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
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65
66
67#if defined(CONFIG_SH64_SR_WATCH)
68#define SR_MMU 0x84000000
69#else
70#define SR_MMU 0x80000000
71#endif
72
73#define SR_IMASK 0x000000f0
74#define SR_FD 0x00008000
75#define SR_SSTEP 0x08000000
76
77#ifndef __ASSEMBLY__
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81
82
83
84struct sh_fpu_hard_struct {
85 unsigned long fp_regs[64];
86 unsigned int fpscr;
87
88};
89
90#if 0
91
92struct sh_fpu_soft_struct {
93 unsigned long long fp_regs[32];
94 unsigned int fpscr;
95 unsigned char lookahead;
96 unsigned long entry_pc;
97};
98#endif
99
100union sh_fpu_union {
101 struct sh_fpu_hard_struct hard;
102
103
104 unsigned long long alignment_dummy;
105};
106
107struct thread_struct {
108 unsigned long sp;
109 unsigned long pc;
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111
112
113
114 struct pt_regs *kregs;
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116
117
118 struct pt_regs *uregs;
119
120 unsigned long trap_no, error_code;
121 unsigned long address;
122
123
124
125 union sh_fpu_union fpu;
126};
127
128#define INIT_MMAP \
129{ &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }
130
131#define INIT_THREAD { \
132 .sp = sizeof(init_stack) + \
133 (long) &init_stack, \
134 .pc = 0, \
135 .kregs = &fake_swapper_regs, \
136 .uregs = NULL, \
137 .trap_no = 0, \
138 .error_code = 0, \
139 .address = 0, \
140 .fpu = { { { 0, } }, } \
141}
142
143
144
145
146#define SR_USER (SR_MMU | SR_FD)
147
148#define start_thread(_regs, new_pc, new_sp) \
149 set_fs(USER_DS); \
150 _regs->sr = SR_USER; \
151 _regs->pc = new_pc - 4; \
152 _regs->pc |= 1; \
153 _regs->regs[18] = 0; \
154 _regs->regs[15] = new_sp
155
156
157struct task_struct;
158struct mm_struct;
159
160
161extern void release_thread(struct task_struct *);
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163
164
165extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
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167
168
169#define copy_segments(p, mm) do { } while (0)
170#define release_segments(mm) do { } while (0)
171#define forget_segments() do { } while (0)
172#define prepare_to_copy(tsk) do { } while (0)
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174
175
176
177static inline void disable_fpu(void)
178{
179 unsigned long long __dummy;
180
181
182 __asm__ __volatile__("getcon " __SR ", %0\n\t"
183 "or %0, %1, %0\n\t"
184 "putcon %0, " __SR "\n\t"
185 : "=&r" (__dummy)
186 : "r" (SR_FD));
187}
188
189static inline void enable_fpu(void)
190{
191 unsigned long long __dummy;
192
193
194 __asm__ __volatile__("getcon " __SR ", %0\n\t"
195 "and %0, %1, %0\n\t"
196 "putcon %0, " __SR "\n\t"
197 : "=&r" (__dummy)
198 : "r" (~SR_FD));
199}
200
201
202
203
204#if defined(CONFIG_SH64_FPU_DENORM_FLUSH)
205#define FPSCR_INIT 0x00040000
206#else
207#define FPSCR_INIT 0x00000000
208#endif
209
210#ifdef CONFIG_SH_FPU
211
212void fpinit(struct sh_fpu_hard_struct *fpregs);
213#else
214#define fpinit(fpregs) do { } while (0)
215#endif
216
217extern struct task_struct *last_task_used_math;
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219
220
221
222#define thread_saved_pc(tsk) (tsk->thread.pc)
223
224extern unsigned long get_wchan(struct task_struct *p);
225
226#define KSTK_EIP(tsk) ((tsk)->thread.pc)
227#define KSTK_ESP(tsk) ((tsk)->thread.sp)
228
229#define user_stack_pointer(_regs) ((_regs)->regs[15])
230
231#endif
232#endif
233