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20#include <linux/mm.h>
21#include <linux/fs.h>
22#include <linux/ptrace.h>
23#include <linux/reboot.h>
24#include <linux/slab.h>
25#include <linux/init.h>
26#include <linux/module.h>
27#include <linux/io.h>
28#include <asm/syscalls.h>
29#include <asm/uaccess.h>
30#include <asm/pgtable.h>
31#include <asm/mmu_context.h>
32#include <asm/fpu.h>
33#include <asm/switch_to.h>
34
35struct task_struct *last_task_used_math = NULL;
36struct pt_regs fake_swapper_regs = { 0, };
37
38void show_regs(struct pt_regs *regs)
39{
40 unsigned long long ah, al, bh, bl, ch, cl;
41
42 printk("\n");
43 show_regs_print_info(KERN_DEFAULT);
44
45 ah = (regs->pc) >> 32;
46 al = (regs->pc) & 0xffffffff;
47 bh = (regs->regs[18]) >> 32;
48 bl = (regs->regs[18]) & 0xffffffff;
49 ch = (regs->regs[15]) >> 32;
50 cl = (regs->regs[15]) & 0xffffffff;
51 printk("PC : %08Lx%08Lx LINK: %08Lx%08Lx SP : %08Lx%08Lx\n",
52 ah, al, bh, bl, ch, cl);
53
54 ah = (regs->sr) >> 32;
55 al = (regs->sr) & 0xffffffff;
56 asm volatile ("getcon " __TEA ", %0" : "=r" (bh));
57 asm volatile ("getcon " __TEA ", %0" : "=r" (bl));
58 bh = (bh) >> 32;
59 bl = (bl) & 0xffffffff;
60 asm volatile ("getcon " __KCR0 ", %0" : "=r" (ch));
61 asm volatile ("getcon " __KCR0 ", %0" : "=r" (cl));
62 ch = (ch) >> 32;
63 cl = (cl) & 0xffffffff;
64 printk("SR : %08Lx%08Lx TEA : %08Lx%08Lx KCR0: %08Lx%08Lx\n",
65 ah, al, bh, bl, ch, cl);
66
67 ah = (regs->regs[0]) >> 32;
68 al = (regs->regs[0]) & 0xffffffff;
69 bh = (regs->regs[1]) >> 32;
70 bl = (regs->regs[1]) & 0xffffffff;
71 ch = (regs->regs[2]) >> 32;
72 cl = (regs->regs[2]) & 0xffffffff;
73 printk("R0 : %08Lx%08Lx R1 : %08Lx%08Lx R2 : %08Lx%08Lx\n",
74 ah, al, bh, bl, ch, cl);
75
76 ah = (regs->regs[3]) >> 32;
77 al = (regs->regs[3]) & 0xffffffff;
78 bh = (regs->regs[4]) >> 32;
79 bl = (regs->regs[4]) & 0xffffffff;
80 ch = (regs->regs[5]) >> 32;
81 cl = (regs->regs[5]) & 0xffffffff;
82 printk("R3 : %08Lx%08Lx R4 : %08Lx%08Lx R5 : %08Lx%08Lx\n",
83 ah, al, bh, bl, ch, cl);
84
85 ah = (regs->regs[6]) >> 32;
86 al = (regs->regs[6]) & 0xffffffff;
87 bh = (regs->regs[7]) >> 32;
88 bl = (regs->regs[7]) & 0xffffffff;
89 ch = (regs->regs[8]) >> 32;
90 cl = (regs->regs[8]) & 0xffffffff;
91 printk("R6 : %08Lx%08Lx R7 : %08Lx%08Lx R8 : %08Lx%08Lx\n",
92 ah, al, bh, bl, ch, cl);
93
94 ah = (regs->regs[9]) >> 32;
95 al = (regs->regs[9]) & 0xffffffff;
96 bh = (regs->regs[10]) >> 32;
97 bl = (regs->regs[10]) & 0xffffffff;
98 ch = (regs->regs[11]) >> 32;
99 cl = (regs->regs[11]) & 0xffffffff;
100 printk("R9 : %08Lx%08Lx R10 : %08Lx%08Lx R11 : %08Lx%08Lx\n",
101 ah, al, bh, bl, ch, cl);
102
103 ah = (regs->regs[12]) >> 32;
104 al = (regs->regs[12]) & 0xffffffff;
105 bh = (regs->regs[13]) >> 32;
106 bl = (regs->regs[13]) & 0xffffffff;
107 ch = (regs->regs[14]) >> 32;
108 cl = (regs->regs[14]) & 0xffffffff;
109 printk("R12 : %08Lx%08Lx R13 : %08Lx%08Lx R14 : %08Lx%08Lx\n",
110 ah, al, bh, bl, ch, cl);
111
112 ah = (regs->regs[16]) >> 32;
113 al = (regs->regs[16]) & 0xffffffff;
114 bh = (regs->regs[17]) >> 32;
115 bl = (regs->regs[17]) & 0xffffffff;
116 ch = (regs->regs[19]) >> 32;
117 cl = (regs->regs[19]) & 0xffffffff;
118 printk("R16 : %08Lx%08Lx R17 : %08Lx%08Lx R19 : %08Lx%08Lx\n",
119 ah, al, bh, bl, ch, cl);
120
121 ah = (regs->regs[20]) >> 32;
122 al = (regs->regs[20]) & 0xffffffff;
123 bh = (regs->regs[21]) >> 32;
124 bl = (regs->regs[21]) & 0xffffffff;
125 ch = (regs->regs[22]) >> 32;
126 cl = (regs->regs[22]) & 0xffffffff;
127 printk("R20 : %08Lx%08Lx R21 : %08Lx%08Lx R22 : %08Lx%08Lx\n",
128 ah, al, bh, bl, ch, cl);
129
130 ah = (regs->regs[23]) >> 32;
131 al = (regs->regs[23]) & 0xffffffff;
132 bh = (regs->regs[24]) >> 32;
133 bl = (regs->regs[24]) & 0xffffffff;
134 ch = (regs->regs[25]) >> 32;
135 cl = (regs->regs[25]) & 0xffffffff;
136 printk("R23 : %08Lx%08Lx R24 : %08Lx%08Lx R25 : %08Lx%08Lx\n",
137 ah, al, bh, bl, ch, cl);
138
139 ah = (regs->regs[26]) >> 32;
140 al = (regs->regs[26]) & 0xffffffff;
141 bh = (regs->regs[27]) >> 32;
142 bl = (regs->regs[27]) & 0xffffffff;
143 ch = (regs->regs[28]) >> 32;
144 cl = (regs->regs[28]) & 0xffffffff;
145 printk("R26 : %08Lx%08Lx R27 : %08Lx%08Lx R28 : %08Lx%08Lx\n",
146 ah, al, bh, bl, ch, cl);
147
148 ah = (regs->regs[29]) >> 32;
149 al = (regs->regs[29]) & 0xffffffff;
150 bh = (regs->regs[30]) >> 32;
151 bl = (regs->regs[30]) & 0xffffffff;
152 ch = (regs->regs[31]) >> 32;
153 cl = (regs->regs[31]) & 0xffffffff;
154 printk("R29 : %08Lx%08Lx R30 : %08Lx%08Lx R31 : %08Lx%08Lx\n",
155 ah, al, bh, bl, ch, cl);
156
157 ah = (regs->regs[32]) >> 32;
158 al = (regs->regs[32]) & 0xffffffff;
159 bh = (regs->regs[33]) >> 32;
160 bl = (regs->regs[33]) & 0xffffffff;
161 ch = (regs->regs[34]) >> 32;
162 cl = (regs->regs[34]) & 0xffffffff;
163 printk("R32 : %08Lx%08Lx R33 : %08Lx%08Lx R34 : %08Lx%08Lx\n",
164 ah, al, bh, bl, ch, cl);
165
166 ah = (regs->regs[35]) >> 32;
167 al = (regs->regs[35]) & 0xffffffff;
168 bh = (regs->regs[36]) >> 32;
169 bl = (regs->regs[36]) & 0xffffffff;
170 ch = (regs->regs[37]) >> 32;
171 cl = (regs->regs[37]) & 0xffffffff;
172 printk("R35 : %08Lx%08Lx R36 : %08Lx%08Lx R37 : %08Lx%08Lx\n",
173 ah, al, bh, bl, ch, cl);
174
175 ah = (regs->regs[38]) >> 32;
176 al = (regs->regs[38]) & 0xffffffff;
177 bh = (regs->regs[39]) >> 32;
178 bl = (regs->regs[39]) & 0xffffffff;
179 ch = (regs->regs[40]) >> 32;
180 cl = (regs->regs[40]) & 0xffffffff;
181 printk("R38 : %08Lx%08Lx R39 : %08Lx%08Lx R40 : %08Lx%08Lx\n",
182 ah, al, bh, bl, ch, cl);
183
184 ah = (regs->regs[41]) >> 32;
185 al = (regs->regs[41]) & 0xffffffff;
186 bh = (regs->regs[42]) >> 32;
187 bl = (regs->regs[42]) & 0xffffffff;
188 ch = (regs->regs[43]) >> 32;
189 cl = (regs->regs[43]) & 0xffffffff;
190 printk("R41 : %08Lx%08Lx R42 : %08Lx%08Lx R43 : %08Lx%08Lx\n",
191 ah, al, bh, bl, ch, cl);
192
193 ah = (regs->regs[44]) >> 32;
194 al = (regs->regs[44]) & 0xffffffff;
195 bh = (regs->regs[45]) >> 32;
196 bl = (regs->regs[45]) & 0xffffffff;
197 ch = (regs->regs[46]) >> 32;
198 cl = (regs->regs[46]) & 0xffffffff;
199 printk("R44 : %08Lx%08Lx R45 : %08Lx%08Lx R46 : %08Lx%08Lx\n",
200 ah, al, bh, bl, ch, cl);
201
202 ah = (regs->regs[47]) >> 32;
203 al = (regs->regs[47]) & 0xffffffff;
204 bh = (regs->regs[48]) >> 32;
205 bl = (regs->regs[48]) & 0xffffffff;
206 ch = (regs->regs[49]) >> 32;
207 cl = (regs->regs[49]) & 0xffffffff;
208 printk("R47 : %08Lx%08Lx R48 : %08Lx%08Lx R49 : %08Lx%08Lx\n",
209 ah, al, bh, bl, ch, cl);
210
211 ah = (regs->regs[50]) >> 32;
212 al = (regs->regs[50]) & 0xffffffff;
213 bh = (regs->regs[51]) >> 32;
214 bl = (regs->regs[51]) & 0xffffffff;
215 ch = (regs->regs[52]) >> 32;
216 cl = (regs->regs[52]) & 0xffffffff;
217 printk("R50 : %08Lx%08Lx R51 : %08Lx%08Lx R52 : %08Lx%08Lx\n",
218 ah, al, bh, bl, ch, cl);
219
220 ah = (regs->regs[53]) >> 32;
221 al = (regs->regs[53]) & 0xffffffff;
222 bh = (regs->regs[54]) >> 32;
223 bl = (regs->regs[54]) & 0xffffffff;
224 ch = (regs->regs[55]) >> 32;
225 cl = (regs->regs[55]) & 0xffffffff;
226 printk("R53 : %08Lx%08Lx R54 : %08Lx%08Lx R55 : %08Lx%08Lx\n",
227 ah, al, bh, bl, ch, cl);
228
229 ah = (regs->regs[56]) >> 32;
230 al = (regs->regs[56]) & 0xffffffff;
231 bh = (regs->regs[57]) >> 32;
232 bl = (regs->regs[57]) & 0xffffffff;
233 ch = (regs->regs[58]) >> 32;
234 cl = (regs->regs[58]) & 0xffffffff;
235 printk("R56 : %08Lx%08Lx R57 : %08Lx%08Lx R58 : %08Lx%08Lx\n",
236 ah, al, bh, bl, ch, cl);
237
238 ah = (regs->regs[59]) >> 32;
239 al = (regs->regs[59]) & 0xffffffff;
240 bh = (regs->regs[60]) >> 32;
241 bl = (regs->regs[60]) & 0xffffffff;
242 ch = (regs->regs[61]) >> 32;
243 cl = (regs->regs[61]) & 0xffffffff;
244 printk("R59 : %08Lx%08Lx R60 : %08Lx%08Lx R61 : %08Lx%08Lx\n",
245 ah, al, bh, bl, ch, cl);
246
247 ah = (regs->regs[62]) >> 32;
248 al = (regs->regs[62]) & 0xffffffff;
249 bh = (regs->tregs[0]) >> 32;
250 bl = (regs->tregs[0]) & 0xffffffff;
251 ch = (regs->tregs[1]) >> 32;
252 cl = (regs->tregs[1]) & 0xffffffff;
253 printk("R62 : %08Lx%08Lx T0 : %08Lx%08Lx T1 : %08Lx%08Lx\n",
254 ah, al, bh, bl, ch, cl);
255
256 ah = (regs->tregs[2]) >> 32;
257 al = (regs->tregs[2]) & 0xffffffff;
258 bh = (regs->tregs[3]) >> 32;
259 bl = (regs->tregs[3]) & 0xffffffff;
260 ch = (regs->tregs[4]) >> 32;
261 cl = (regs->tregs[4]) & 0xffffffff;
262 printk("T2 : %08Lx%08Lx T3 : %08Lx%08Lx T4 : %08Lx%08Lx\n",
263 ah, al, bh, bl, ch, cl);
264
265 ah = (regs->tregs[5]) >> 32;
266 al = (regs->tregs[5]) & 0xffffffff;
267 bh = (regs->tregs[6]) >> 32;
268 bl = (regs->tregs[6]) & 0xffffffff;
269 ch = (regs->tregs[7]) >> 32;
270 cl = (regs->tregs[7]) & 0xffffffff;
271 printk("T5 : %08Lx%08Lx T6 : %08Lx%08Lx T7 : %08Lx%08Lx\n",
272 ah, al, bh, bl, ch, cl);
273
274
275
276
277 if (!user_mode(regs)) {
278 void show_stack(struct task_struct *tsk, unsigned long *sp);
279 unsigned long sp = regs->regs[15] & 0xffffffff;
280 struct task_struct *tsk = get_current();
281
282 tsk->thread.kregs = regs;
283
284 show_stack(tsk, (unsigned long *)sp);
285 }
286}
287
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289
290
291void exit_thread(void)
292{
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308
309#ifdef CONFIG_SH_FPU
310 if (last_task_used_math == current) {
311 last_task_used_math = NULL;
312 }
313#endif
314}
315
316void flush_thread(void)
317{
318
319
320
321#ifdef CONFIG_SH_FPU
322 if (last_task_used_math == current) {
323 last_task_used_math = NULL;
324 }
325
326 clear_used_math();
327#endif
328
329
330
331
332 if(current->thread.kregs==&fake_swapper_regs) {
333 current->thread.kregs =
334 ((struct pt_regs *)(THREAD_SIZE + (unsigned long) current) - 1);
335 current->thread.uregs = current->thread.kregs;
336 }
337}
338
339void release_thread(struct task_struct *dead_task)
340{
341
342}
343
344
345int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
346{
347#ifdef CONFIG_SH_FPU
348 int fpvalid;
349 struct task_struct *tsk = current;
350
351 fpvalid = !!tsk_used_math(tsk);
352 if (fpvalid) {
353 if (current == last_task_used_math) {
354 enable_fpu();
355 save_fpu(tsk);
356 disable_fpu();
357 last_task_used_math = 0;
358 regs->sr |= SR_FD;
359 }
360
361 memcpy(fpu, &tsk->thread.xstate->hardfpu, sizeof(*fpu));
362 }
363
364 return fpvalid;
365#else
366 return 0;
367#endif
368}
369EXPORT_SYMBOL(dump_fpu);
370
371asmlinkage void ret_from_fork(void);
372asmlinkage void ret_from_kernel_thread(void);
373
374int copy_thread(unsigned long clone_flags, unsigned long usp,
375 unsigned long arg, struct task_struct *p)
376{
377 struct pt_regs *childregs;
378
379#ifdef CONFIG_SH_FPU
380
381 if (last_task_used_math == current) {
382 enable_fpu();
383 save_fpu(current);
384 disable_fpu();
385 last_task_used_math = NULL;
386 current_pt_regs()->sr |= SR_FD;
387 }
388#endif
389
390 childregs = (struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1;
391 p->thread.sp = (unsigned long) childregs;
392
393 if (unlikely(p->flags & PF_KTHREAD)) {
394 memset(childregs, 0, sizeof(struct pt_regs));
395 childregs->regs[2] = (unsigned long)arg;
396 childregs->regs[3] = (unsigned long)usp;
397 childregs->sr = (1 << 30);
398 childregs->sr |= SR_FD;
399 p->thread.pc = (unsigned long) ret_from_kernel_thread;
400 return 0;
401 }
402 *childregs = *current_pt_regs();
403
404
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407
408
409
410 if (usp)
411 childregs->regs[15] = neff_sign_extend(usp);
412 p->thread.uregs = childregs;
413
414 childregs->regs[9] = 0;
415 childregs->sr |= SR_FD;
416
417 p->thread.pc = (unsigned long) ret_from_fork;
418
419 return 0;
420}
421
422#ifdef CONFIG_FRAME_POINTER
423static int in_sh64_switch_to(unsigned long pc)
424{
425 extern char __sh64_switch_to_end;
426
427
428 return (pc >= (unsigned long) sh64_switch_to) &&
429 (pc < (unsigned long) &__sh64_switch_to_end);
430}
431#endif
432
433unsigned long get_wchan(struct task_struct *p)
434{
435 unsigned long pc;
436
437 if (!p || p == current || p->state == TASK_RUNNING)
438 return 0;
439
440
441
442
443 pc = thread_saved_pc(p);
444
445#ifdef CONFIG_FRAME_POINTER
446 if (in_sh64_switch_to(pc)) {
447 unsigned long schedule_fp;
448 unsigned long sh64_switch_to_fp;
449 unsigned long schedule_caller_pc;
450
451 sh64_switch_to_fp = (long) p->thread.sp;
452
453 schedule_fp = *(unsigned long *) (long)(sh64_switch_to_fp + 4);
454
455
456
457 schedule_caller_pc = *(unsigned long *) (long)(schedule_fp + 24);
458 return schedule_caller_pc;
459 }
460#endif
461 return pc;
462}
463