2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 1996, 98, 99, 2000, 01 Ralf Baechle
8 * Multi-arch abstraction and asm macros for easier reading:
9 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
11 * Carsten Langgaard, carstenl@mips.com
12 * Copyright (C) 2000 MIPS Technologies, Inc.
13 * Copyright (C) 1999, 2001 Silicon Graphics, Inc.
16 #include <asm/asmmacro.h>
17 #include <asm/errno.h>
18 #include <asm/fpregdef.h>
19 #include <asm/mipsregs.h>
20 #include <asm/asm-offsets.h>
21 #include <asm/regdef.h>
23 .macro EX insn, reg, src
26 .ex\@: \insn \reg, \src
28 .section __ex_table,"a"
36 LEAF(_save_fp_context)
39 #if defined(CONFIG_64BIT) || defined(CONFIG_CPU_MIPS32_R2)
41 #ifdef CONFIG_CPU_MIPS32_R2
45 bgez t0, 1f # skip storing odd if FR=0
48 /* Store the 16 odd double precision registers */
49 EX sdc1 $f1, SC_FPREGS+8(a0)
50 EX sdc1 $f3, SC_FPREGS+24(a0)
51 EX sdc1 $f5, SC_FPREGS+40(a0)
52 EX sdc1 $f7, SC_FPREGS+56(a0)
53 EX sdc1 $f9, SC_FPREGS+72(a0)
54 EX sdc1 $f11, SC_FPREGS+88(a0)
55 EX sdc1 $f13, SC_FPREGS+104(a0)
56 EX sdc1 $f15, SC_FPREGS+120(a0)
57 EX sdc1 $f17, SC_FPREGS+136(a0)
58 EX sdc1 $f19, SC_FPREGS+152(a0)
59 EX sdc1 $f21, SC_FPREGS+168(a0)
60 EX sdc1 $f23, SC_FPREGS+184(a0)
61 EX sdc1 $f25, SC_FPREGS+200(a0)
62 EX sdc1 $f27, SC_FPREGS+216(a0)
63 EX sdc1 $f29, SC_FPREGS+232(a0)
64 EX sdc1 $f31, SC_FPREGS+248(a0)
68 /* Store the 16 even double precision registers */
69 EX sdc1 $f0, SC_FPREGS+0(a0)
70 EX sdc1 $f2, SC_FPREGS+16(a0)
71 EX sdc1 $f4, SC_FPREGS+32(a0)
72 EX sdc1 $f6, SC_FPREGS+48(a0)
73 EX sdc1 $f8, SC_FPREGS+64(a0)
74 EX sdc1 $f10, SC_FPREGS+80(a0)
75 EX sdc1 $f12, SC_FPREGS+96(a0)
76 EX sdc1 $f14, SC_FPREGS+112(a0)
77 EX sdc1 $f16, SC_FPREGS+128(a0)
78 EX sdc1 $f18, SC_FPREGS+144(a0)
79 EX sdc1 $f20, SC_FPREGS+160(a0)
80 EX sdc1 $f22, SC_FPREGS+176(a0)
81 EX sdc1 $f24, SC_FPREGS+192(a0)
82 EX sdc1 $f26, SC_FPREGS+208(a0)
83 EX sdc1 $f28, SC_FPREGS+224(a0)
84 EX sdc1 $f30, SC_FPREGS+240(a0)
85 EX sw t1, SC_FPC_CSR(a0)
90 #ifdef CONFIG_MIPS32_COMPAT
91 /* Save 32-bit process floating point context */
92 LEAF(_save_fp_context32)
97 bgez t0, 1f # skip storing odd if FR=0
100 /* Store the 16 odd double precision registers */
101 EX sdc1 $f1, SC32_FPREGS+8(a0)
102 EX sdc1 $f3, SC32_FPREGS+24(a0)
103 EX sdc1 $f5, SC32_FPREGS+40(a0)
104 EX sdc1 $f7, SC32_FPREGS+56(a0)
105 EX sdc1 $f9, SC32_FPREGS+72(a0)
106 EX sdc1 $f11, SC32_FPREGS+88(a0)
107 EX sdc1 $f13, SC32_FPREGS+104(a0)
108 EX sdc1 $f15, SC32_FPREGS+120(a0)
109 EX sdc1 $f17, SC32_FPREGS+136(a0)
110 EX sdc1 $f19, SC32_FPREGS+152(a0)
111 EX sdc1 $f21, SC32_FPREGS+168(a0)
112 EX sdc1 $f23, SC32_FPREGS+184(a0)
113 EX sdc1 $f25, SC32_FPREGS+200(a0)
114 EX sdc1 $f27, SC32_FPREGS+216(a0)
115 EX sdc1 $f29, SC32_FPREGS+232(a0)
116 EX sdc1 $f31, SC32_FPREGS+248(a0)
118 /* Store the 16 even double precision registers */
119 1: EX sdc1 $f0, SC32_FPREGS+0(a0)
120 EX sdc1 $f2, SC32_FPREGS+16(a0)
121 EX sdc1 $f4, SC32_FPREGS+32(a0)
122 EX sdc1 $f6, SC32_FPREGS+48(a0)
123 EX sdc1 $f8, SC32_FPREGS+64(a0)
124 EX sdc1 $f10, SC32_FPREGS+80(a0)
125 EX sdc1 $f12, SC32_FPREGS+96(a0)
126 EX sdc1 $f14, SC32_FPREGS+112(a0)
127 EX sdc1 $f16, SC32_FPREGS+128(a0)
128 EX sdc1 $f18, SC32_FPREGS+144(a0)
129 EX sdc1 $f20, SC32_FPREGS+160(a0)
130 EX sdc1 $f22, SC32_FPREGS+176(a0)
131 EX sdc1 $f24, SC32_FPREGS+192(a0)
132 EX sdc1 $f26, SC32_FPREGS+208(a0)
133 EX sdc1 $f28, SC32_FPREGS+224(a0)
134 EX sdc1 $f30, SC32_FPREGS+240(a0)
135 EX sw t1, SC32_FPC_CSR(a0)
136 cfc1 t0, $0 # implementation/version
137 EX sw t0, SC32_FPC_EIR(a0)
141 END(_save_fp_context32)
147 * - cp1 status/control register
149 LEAF(_restore_fp_context)
150 EX lw t1, SC_FPC_CSR(a0)
152 #if defined(CONFIG_64BIT) || defined(CONFIG_CPU_MIPS32_R2)
154 #ifdef CONFIG_CPU_MIPS32_R2
158 bgez t0, 1f # skip loading odd if FR=0
161 EX ldc1 $f1, SC_FPREGS+8(a0)
162 EX ldc1 $f3, SC_FPREGS+24(a0)
163 EX ldc1 $f5, SC_FPREGS+40(a0)
164 EX ldc1 $f7, SC_FPREGS+56(a0)
165 EX ldc1 $f9, SC_FPREGS+72(a0)
166 EX ldc1 $f11, SC_FPREGS+88(a0)
167 EX ldc1 $f13, SC_FPREGS+104(a0)
168 EX ldc1 $f15, SC_FPREGS+120(a0)
169 EX ldc1 $f17, SC_FPREGS+136(a0)
170 EX ldc1 $f19, SC_FPREGS+152(a0)
171 EX ldc1 $f21, SC_FPREGS+168(a0)
172 EX ldc1 $f23, SC_FPREGS+184(a0)
173 EX ldc1 $f25, SC_FPREGS+200(a0)
174 EX ldc1 $f27, SC_FPREGS+216(a0)
175 EX ldc1 $f29, SC_FPREGS+232(a0)
176 EX ldc1 $f31, SC_FPREGS+248(a0)
179 EX ldc1 $f0, SC_FPREGS+0(a0)
180 EX ldc1 $f2, SC_FPREGS+16(a0)
181 EX ldc1 $f4, SC_FPREGS+32(a0)
182 EX ldc1 $f6, SC_FPREGS+48(a0)
183 EX ldc1 $f8, SC_FPREGS+64(a0)
184 EX ldc1 $f10, SC_FPREGS+80(a0)
185 EX ldc1 $f12, SC_FPREGS+96(a0)
186 EX ldc1 $f14, SC_FPREGS+112(a0)
187 EX ldc1 $f16, SC_FPREGS+128(a0)
188 EX ldc1 $f18, SC_FPREGS+144(a0)
189 EX ldc1 $f20, SC_FPREGS+160(a0)
190 EX ldc1 $f22, SC_FPREGS+176(a0)
191 EX ldc1 $f24, SC_FPREGS+192(a0)
192 EX ldc1 $f26, SC_FPREGS+208(a0)
193 EX ldc1 $f28, SC_FPREGS+224(a0)
194 EX ldc1 $f30, SC_FPREGS+240(a0)
198 END(_restore_fp_context)
200 #ifdef CONFIG_MIPS32_COMPAT
201 LEAF(_restore_fp_context32)
202 /* Restore an o32 sigcontext. */
203 EX lw t1, SC32_FPC_CSR(a0)
207 bgez t0, 1f # skip loading odd if FR=0
210 EX ldc1 $f1, SC32_FPREGS+8(a0)
211 EX ldc1 $f3, SC32_FPREGS+24(a0)
212 EX ldc1 $f5, SC32_FPREGS+40(a0)
213 EX ldc1 $f7, SC32_FPREGS+56(a0)
214 EX ldc1 $f9, SC32_FPREGS+72(a0)
215 EX ldc1 $f11, SC32_FPREGS+88(a0)
216 EX ldc1 $f13, SC32_FPREGS+104(a0)
217 EX ldc1 $f15, SC32_FPREGS+120(a0)
218 EX ldc1 $f17, SC32_FPREGS+136(a0)
219 EX ldc1 $f19, SC32_FPREGS+152(a0)
220 EX ldc1 $f21, SC32_FPREGS+168(a0)
221 EX ldc1 $f23, SC32_FPREGS+184(a0)
222 EX ldc1 $f25, SC32_FPREGS+200(a0)
223 EX ldc1 $f27, SC32_FPREGS+216(a0)
224 EX ldc1 $f29, SC32_FPREGS+232(a0)
225 EX ldc1 $f31, SC32_FPREGS+248(a0)
227 1: EX ldc1 $f0, SC32_FPREGS+0(a0)
228 EX ldc1 $f2, SC32_FPREGS+16(a0)
229 EX ldc1 $f4, SC32_FPREGS+32(a0)
230 EX ldc1 $f6, SC32_FPREGS+48(a0)
231 EX ldc1 $f8, SC32_FPREGS+64(a0)
232 EX ldc1 $f10, SC32_FPREGS+80(a0)
233 EX ldc1 $f12, SC32_FPREGS+96(a0)
234 EX ldc1 $f14, SC32_FPREGS+112(a0)
235 EX ldc1 $f16, SC32_FPREGS+128(a0)
236 EX ldc1 $f18, SC32_FPREGS+144(a0)
237 EX ldc1 $f20, SC32_FPREGS+160(a0)
238 EX ldc1 $f22, SC32_FPREGS+176(a0)
239 EX ldc1 $f24, SC32_FPREGS+192(a0)
240 EX ldc1 $f26, SC32_FPREGS+208(a0)
241 EX ldc1 $f28, SC32_FPREGS+224(a0)
242 EX ldc1 $f30, SC32_FPREGS+240(a0)
246 END(_restore_fp_context32)
249 #ifdef CONFIG_CPU_HAS_MSA
251 .macro save_sc_msareg wr, off, sc, tmp
253 copy_u_d \tmp, \wr, 1
254 EX sd \tmp, (\off+(\wr*8))(\sc)
255 #elif defined(CONFIG_CPU_LITTLE_ENDIAN)
256 copy_u_w \tmp, \wr, 2
257 EX sw \tmp, (\off+(\wr*8)+0)(\sc)
258 copy_u_w \tmp, \wr, 3
259 EX sw \tmp, (\off+(\wr*8)+4)(\sc)
260 #else /* CONFIG_CPU_BIG_ENDIAN */
261 copy_u_w \tmp, \wr, 2
262 EX sw \tmp, (\off+(\wr*8)+4)(\sc)
263 copy_u_w \tmp, \wr, 3
264 EX sw \tmp, (\off+(\wr*8)+0)(\sc)
269 * int _save_msa_context(struct sigcontext *sc)
271 * Save the upper 64 bits of each vector register along with the MSA_CSR
272 * register into sc. Returns zero on success, else non-zero.
274 LEAF(_save_msa_context)
275 save_sc_msareg 0, SC_MSAREGS, a0, t0
276 save_sc_msareg 1, SC_MSAREGS, a0, t0
277 save_sc_msareg 2, SC_MSAREGS, a0, t0
278 save_sc_msareg 3, SC_MSAREGS, a0, t0
279 save_sc_msareg 4, SC_MSAREGS, a0, t0
280 save_sc_msareg 5, SC_MSAREGS, a0, t0
281 save_sc_msareg 6, SC_MSAREGS, a0, t0
282 save_sc_msareg 7, SC_MSAREGS, a0, t0
283 save_sc_msareg 8, SC_MSAREGS, a0, t0
284 save_sc_msareg 9, SC_MSAREGS, a0, t0
285 save_sc_msareg 10, SC_MSAREGS, a0, t0
286 save_sc_msareg 11, SC_MSAREGS, a0, t0
287 save_sc_msareg 12, SC_MSAREGS, a0, t0
288 save_sc_msareg 13, SC_MSAREGS, a0, t0
289 save_sc_msareg 14, SC_MSAREGS, a0, t0
290 save_sc_msareg 15, SC_MSAREGS, a0, t0
291 save_sc_msareg 16, SC_MSAREGS, a0, t0
292 save_sc_msareg 17, SC_MSAREGS, a0, t0
293 save_sc_msareg 18, SC_MSAREGS, a0, t0
294 save_sc_msareg 19, SC_MSAREGS, a0, t0
295 save_sc_msareg 20, SC_MSAREGS, a0, t0
296 save_sc_msareg 21, SC_MSAREGS, a0, t0
297 save_sc_msareg 22, SC_MSAREGS, a0, t0
298 save_sc_msareg 23, SC_MSAREGS, a0, t0
299 save_sc_msareg 24, SC_MSAREGS, a0, t0
300 save_sc_msareg 25, SC_MSAREGS, a0, t0
301 save_sc_msareg 26, SC_MSAREGS, a0, t0
302 save_sc_msareg 27, SC_MSAREGS, a0, t0
303 save_sc_msareg 28, SC_MSAREGS, a0, t0
304 save_sc_msareg 29, SC_MSAREGS, a0, t0
305 save_sc_msareg 30, SC_MSAREGS, a0, t0
306 save_sc_msareg 31, SC_MSAREGS, a0, t0
309 END(_save_msa_context)
311 #ifdef CONFIG_MIPS32_COMPAT
314 * int _save_msa_context32(struct sigcontext32 *sc)
316 * Save the upper 64 bits of each vector register along with the MSA_CSR
317 * register into sc. Returns zero on success, else non-zero.
319 LEAF(_save_msa_context32)
320 save_sc_msareg 0, SC32_MSAREGS, a0, t0
321 save_sc_msareg 1, SC32_MSAREGS, a0, t0
322 save_sc_msareg 2, SC32_MSAREGS, a0, t0
323 save_sc_msareg 3, SC32_MSAREGS, a0, t0
324 save_sc_msareg 4, SC32_MSAREGS, a0, t0
325 save_sc_msareg 5, SC32_MSAREGS, a0, t0
326 save_sc_msareg 6, SC32_MSAREGS, a0, t0
327 save_sc_msareg 7, SC32_MSAREGS, a0, t0
328 save_sc_msareg 8, SC32_MSAREGS, a0, t0
329 save_sc_msareg 9, SC32_MSAREGS, a0, t0
330 save_sc_msareg 10, SC32_MSAREGS, a0, t0
331 save_sc_msareg 11, SC32_MSAREGS, a0, t0
332 save_sc_msareg 12, SC32_MSAREGS, a0, t0
333 save_sc_msareg 13, SC32_MSAREGS, a0, t0
334 save_sc_msareg 14, SC32_MSAREGS, a0, t0
335 save_sc_msareg 15, SC32_MSAREGS, a0, t0
336 save_sc_msareg 16, SC32_MSAREGS, a0, t0
337 save_sc_msareg 17, SC32_MSAREGS, a0, t0
338 save_sc_msareg 18, SC32_MSAREGS, a0, t0
339 save_sc_msareg 19, SC32_MSAREGS, a0, t0
340 save_sc_msareg 20, SC32_MSAREGS, a0, t0
341 save_sc_msareg 21, SC32_MSAREGS, a0, t0
342 save_sc_msareg 22, SC32_MSAREGS, a0, t0
343 save_sc_msareg 23, SC32_MSAREGS, a0, t0
344 save_sc_msareg 24, SC32_MSAREGS, a0, t0
345 save_sc_msareg 25, SC32_MSAREGS, a0, t0
346 save_sc_msareg 26, SC32_MSAREGS, a0, t0
347 save_sc_msareg 27, SC32_MSAREGS, a0, t0
348 save_sc_msareg 28, SC32_MSAREGS, a0, t0
349 save_sc_msareg 29, SC32_MSAREGS, a0, t0
350 save_sc_msareg 30, SC32_MSAREGS, a0, t0
351 save_sc_msareg 31, SC32_MSAREGS, a0, t0
354 END(_save_msa_context32)
356 #endif /* CONFIG_MIPS32_COMPAT */
358 .macro restore_sc_msareg wr, off, sc, tmp
360 EX ld \tmp, (\off+(\wr*8))(\sc)
361 insert_d \wr, 1, \tmp
362 #elif defined(CONFIG_CPU_LITTLE_ENDIAN)
363 EX lw \tmp, (\off+(\wr*8)+0)(\sc)
364 insert_w \wr, 2, \tmp
365 EX lw \tmp, (\off+(\wr*8)+4)(\sc)
366 insert_w \wr, 3, \tmp
367 #else /* CONFIG_CPU_BIG_ENDIAN */
368 EX lw \tmp, (\off+(\wr*8)+4)(\sc)
369 insert_w \wr, 2, \tmp
370 EX lw \tmp, (\off+(\wr*8)+0)(\sc)
371 insert_w \wr, 3, \tmp
376 * int _restore_msa_context(struct sigcontext *sc)
378 LEAF(_restore_msa_context)
379 restore_sc_msareg 0, SC_MSAREGS, a0, t0
380 restore_sc_msareg 1, SC_MSAREGS, a0, t0
381 restore_sc_msareg 2, SC_MSAREGS, a0, t0
382 restore_sc_msareg 3, SC_MSAREGS, a0, t0
383 restore_sc_msareg 4, SC_MSAREGS, a0, t0
384 restore_sc_msareg 5, SC_MSAREGS, a0, t0
385 restore_sc_msareg 6, SC_MSAREGS, a0, t0
386 restore_sc_msareg 7, SC_MSAREGS, a0, t0
387 restore_sc_msareg 8, SC_MSAREGS, a0, t0
388 restore_sc_msareg 9, SC_MSAREGS, a0, t0
389 restore_sc_msareg 10, SC_MSAREGS, a0, t0
390 restore_sc_msareg 11, SC_MSAREGS, a0, t0
391 restore_sc_msareg 12, SC_MSAREGS, a0, t0
392 restore_sc_msareg 13, SC_MSAREGS, a0, t0
393 restore_sc_msareg 14, SC_MSAREGS, a0, t0
394 restore_sc_msareg 15, SC_MSAREGS, a0, t0
395 restore_sc_msareg 16, SC_MSAREGS, a0, t0
396 restore_sc_msareg 17, SC_MSAREGS, a0, t0
397 restore_sc_msareg 18, SC_MSAREGS, a0, t0
398 restore_sc_msareg 19, SC_MSAREGS, a0, t0
399 restore_sc_msareg 20, SC_MSAREGS, a0, t0
400 restore_sc_msareg 21, SC_MSAREGS, a0, t0
401 restore_sc_msareg 22, SC_MSAREGS, a0, t0
402 restore_sc_msareg 23, SC_MSAREGS, a0, t0
403 restore_sc_msareg 24, SC_MSAREGS, a0, t0
404 restore_sc_msareg 25, SC_MSAREGS, a0, t0
405 restore_sc_msareg 26, SC_MSAREGS, a0, t0
406 restore_sc_msareg 27, SC_MSAREGS, a0, t0
407 restore_sc_msareg 28, SC_MSAREGS, a0, t0
408 restore_sc_msareg 29, SC_MSAREGS, a0, t0
409 restore_sc_msareg 30, SC_MSAREGS, a0, t0
410 restore_sc_msareg 31, SC_MSAREGS, a0, t0
413 END(_restore_msa_context)
415 #ifdef CONFIG_MIPS32_COMPAT
418 * int _restore_msa_context32(struct sigcontext32 *sc)
420 LEAF(_restore_msa_context32)
421 restore_sc_msareg 0, SC32_MSAREGS, a0, t0
422 restore_sc_msareg 1, SC32_MSAREGS, a0, t0
423 restore_sc_msareg 2, SC32_MSAREGS, a0, t0
424 restore_sc_msareg 3, SC32_MSAREGS, a0, t0
425 restore_sc_msareg 4, SC32_MSAREGS, a0, t0
426 restore_sc_msareg 5, SC32_MSAREGS, a0, t0
427 restore_sc_msareg 6, SC32_MSAREGS, a0, t0
428 restore_sc_msareg 7, SC32_MSAREGS, a0, t0
429 restore_sc_msareg 8, SC32_MSAREGS, a0, t0
430 restore_sc_msareg 9, SC32_MSAREGS, a0, t0
431 restore_sc_msareg 10, SC32_MSAREGS, a0, t0
432 restore_sc_msareg 11, SC32_MSAREGS, a0, t0
433 restore_sc_msareg 12, SC32_MSAREGS, a0, t0
434 restore_sc_msareg 13, SC32_MSAREGS, a0, t0
435 restore_sc_msareg 14, SC32_MSAREGS, a0, t0
436 restore_sc_msareg 15, SC32_MSAREGS, a0, t0
437 restore_sc_msareg 16, SC32_MSAREGS, a0, t0
438 restore_sc_msareg 17, SC32_MSAREGS, a0, t0
439 restore_sc_msareg 18, SC32_MSAREGS, a0, t0
440 restore_sc_msareg 19, SC32_MSAREGS, a0, t0
441 restore_sc_msareg 20, SC32_MSAREGS, a0, t0
442 restore_sc_msareg 21, SC32_MSAREGS, a0, t0
443 restore_sc_msareg 22, SC32_MSAREGS, a0, t0
444 restore_sc_msareg 23, SC32_MSAREGS, a0, t0
445 restore_sc_msareg 24, SC32_MSAREGS, a0, t0
446 restore_sc_msareg 25, SC32_MSAREGS, a0, t0
447 restore_sc_msareg 26, SC32_MSAREGS, a0, t0
448 restore_sc_msareg 27, SC32_MSAREGS, a0, t0
449 restore_sc_msareg 28, SC32_MSAREGS, a0, t0
450 restore_sc_msareg 29, SC32_MSAREGS, a0, t0
451 restore_sc_msareg 30, SC32_MSAREGS, a0, t0
452 restore_sc_msareg 31, SC32_MSAREGS, a0, t0
455 END(_restore_msa_context32)
457 #endif /* CONFIG_MIPS32_COMPAT */
459 #endif /* CONFIG_CPU_HAS_MSA */
465 fault: li v0, -EFAULT # failure