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/export.h>
19 #include <asm/fpregdef.h>
20 #include <asm/mipsregs.h>
21 #include <asm/asm-offsets.h>
22 #include <asm/regdef.h>
24 /* preprocessor replaces the fp in ".set fp=64" with $30 otherwise */
27 .macro EX insn, reg, src
31 .ex\@: \insn \reg, \src
33 .section __ex_table,"a"
39 * Save a thread's fp context.
42 EXPORT_SYMBOL(_save_fp)
43 #if defined(CONFIG_64BIT) || defined(CONFIG_CPU_MIPSR2) || \
44 defined(CONFIG_CPU_MIPSR6)
47 fpu_save_double a0 t0 t1 # clobbers t1
52 * Restore a thread's fp context.
55 #if defined(CONFIG_64BIT) || defined(CONFIG_CPU_MIPSR2) || \
56 defined(CONFIG_CPU_MIPSR6)
59 fpu_restore_double a0 t0 t1 # clobbers t1
63 #ifdef CONFIG_CPU_HAS_MSA
66 * Save a thread's MSA vector context.
69 EXPORT_SYMBOL(_save_msa)
75 * Restore a thread's MSA vector context.
90 * Load the FPU with signalling NANS. This bit pattern we're using has
91 * the property that no matter whether considered as single or as double
92 * precision represents signaling NANS.
94 * The value to initialize fcr31 to comes in $a0.
113 bgez t0, 1f # 16 / 32 register mode?
134 #ifdef CONFIG_CPU_MIPS32
168 #if defined(CONFIG_CPU_MIPS32_R2) || defined(CONFIG_CPU_MIPS32_R6)
170 .set MIPS_ISA_LEVEL_RAW
172 sll t0, t0, 5 # is Status.FR set?
173 bgez t0, 1f # no: skip setting upper 32b
208 #endif /* CONFIG_CPU_MIPS32_R2 || CONFIG_CPU_MIPS32_R6 */
210 .set MIPS_ISA_ARCH_LEVEL_RAW
231 .set pop /* SET_HARDFLOAT */
236 * _save_fp_context() - save FP context from the FPU
237 * @a0 - pointer to fpregs field of sigcontext
238 * @a1 - pointer to fpc_csr field of sigcontext
240 * Save FP context, including the 32 FP data registers and the FP
241 * control & status register, from the FPU to signal context.
243 LEAF(_save_fp_context)
249 #if defined(CONFIG_64BIT) || defined(CONFIG_CPU_MIPSR2) || \
250 defined(CONFIG_CPU_MIPSR6)
253 #ifdef CONFIG_CPU_MIPSR2
258 bgez t0, 1f # skip storing odd if FR=0
261 /* Store the 16 odd double precision registers */
268 EX sdc1 $f13, 104(a0)
269 EX sdc1 $f15, 120(a0)
270 EX sdc1 $f17, 136(a0)
271 EX sdc1 $f19, 152(a0)
272 EX sdc1 $f21, 168(a0)
273 EX sdc1 $f23, 184(a0)
274 EX sdc1 $f25, 200(a0)
275 EX sdc1 $f27, 216(a0)
276 EX sdc1 $f29, 232(a0)
277 EX sdc1 $f31, 248(a0)
283 /* Store the 16 even double precision registers */
291 EX sdc1 $f14, 112(a0)
292 EX sdc1 $f16, 128(a0)
293 EX sdc1 $f18, 144(a0)
294 EX sdc1 $f20, 160(a0)
295 EX sdc1 $f22, 176(a0)
296 EX sdc1 $f24, 192(a0)
297 EX sdc1 $f26, 208(a0)
298 EX sdc1 $f28, 224(a0)
299 EX sdc1 $f30, 240(a0)
304 END(_save_fp_context)
307 * _restore_fp_context() - restore FP context to the FPU
308 * @a0 - pointer to fpregs field of sigcontext
309 * @a1 - pointer to fpc_csr field of sigcontext
311 * Restore FP context, including the 32 FP data registers and the FP
312 * control & status register, from signal context to the FPU.
314 LEAF(_restore_fp_context)
317 #if defined(CONFIG_64BIT) || defined(CONFIG_CPU_MIPSR2) || \
318 defined(CONFIG_CPU_MIPSR6)
321 #ifdef CONFIG_CPU_MIPSR2
326 bgez t0, 1f # skip loading odd if FR=0
335 EX ldc1 $f13, 104(a0)
336 EX ldc1 $f15, 120(a0)
337 EX ldc1 $f17, 136(a0)
338 EX ldc1 $f19, 152(a0)
339 EX ldc1 $f21, 168(a0)
340 EX ldc1 $f23, 184(a0)
341 EX ldc1 $f25, 200(a0)
342 EX ldc1 $f27, 216(a0)
343 EX ldc1 $f29, 232(a0)
344 EX ldc1 $f31, 248(a0)
356 EX ldc1 $f14, 112(a0)
357 EX ldc1 $f16, 128(a0)
358 EX ldc1 $f18, 144(a0)
359 EX ldc1 $f20, 160(a0)
360 EX ldc1 $f22, 176(a0)
361 EX ldc1 $f24, 192(a0)
362 EX ldc1 $f26, 208(a0)
363 EX ldc1 $f28, 224(a0)
364 EX ldc1 $f30, 240(a0)
369 END(_restore_fp_context)
371 #ifdef CONFIG_CPU_HAS_MSA
373 .macro op_one_wr op, idx, base
375 \idx: \op \idx, 0, \base
380 .macro op_msa_wr name, op
399 op_one_wr \op, 10, a1
400 op_one_wr \op, 11, a1
401 op_one_wr \op, 12, a1
402 op_one_wr \op, 13, a1
403 op_one_wr \op, 14, a1
404 op_one_wr \op, 15, a1
405 op_one_wr \op, 16, a1
406 op_one_wr \op, 17, a1
407 op_one_wr \op, 18, a1
408 op_one_wr \op, 19, a1
409 op_one_wr \op, 20, a1
410 op_one_wr \op, 21, a1
411 op_one_wr \op, 22, a1
412 op_one_wr \op, 23, a1
413 op_one_wr \op, 24, a1
414 op_one_wr \op, 25, a1
415 op_one_wr \op, 26, a1
416 op_one_wr \op, 27, a1
417 op_one_wr \op, 28, a1
418 op_one_wr \op, 29, a1
419 op_one_wr \op, 30, a1
420 op_one_wr \op, 31, a1
425 op_msa_wr read_msa_wr_b, st_b
426 op_msa_wr read_msa_wr_h, st_h
427 op_msa_wr read_msa_wr_w, st_w
428 op_msa_wr read_msa_wr_d, st_d
430 op_msa_wr write_msa_wr_b, ld_b
431 op_msa_wr write_msa_wr_h, ld_h
432 op_msa_wr write_msa_wr_w, ld_w
433 op_msa_wr write_msa_wr_d, ld_d
435 #endif /* CONFIG_CPU_HAS_MSA */
437 #ifdef CONFIG_CPU_HAS_MSA
439 .macro save_msa_upper wr, off, base
444 EX sd $1, \off(\base)
445 #elif defined(CONFIG_CPU_LITTLE_ENDIAN)
447 EX sw $1, \off(\base)
449 EX sw $1, (\off+4)(\base)
450 #else /* CONFIG_CPU_BIG_ENDIAN */
452 EX sw $1, (\off+4)(\base)
454 EX sw $1, \off(\base)
459 LEAF(_save_msa_all_upper)
460 save_msa_upper 0, 0x00, a0
461 save_msa_upper 1, 0x08, a0
462 save_msa_upper 2, 0x10, a0
463 save_msa_upper 3, 0x18, a0
464 save_msa_upper 4, 0x20, a0
465 save_msa_upper 5, 0x28, a0
466 save_msa_upper 6, 0x30, a0
467 save_msa_upper 7, 0x38, a0
468 save_msa_upper 8, 0x40, a0
469 save_msa_upper 9, 0x48, a0
470 save_msa_upper 10, 0x50, a0
471 save_msa_upper 11, 0x58, a0
472 save_msa_upper 12, 0x60, a0
473 save_msa_upper 13, 0x68, a0
474 save_msa_upper 14, 0x70, a0
475 save_msa_upper 15, 0x78, a0
476 save_msa_upper 16, 0x80, a0
477 save_msa_upper 17, 0x88, a0
478 save_msa_upper 18, 0x90, a0
479 save_msa_upper 19, 0x98, a0
480 save_msa_upper 20, 0xa0, a0
481 save_msa_upper 21, 0xa8, a0
482 save_msa_upper 22, 0xb0, a0
483 save_msa_upper 23, 0xb8, a0
484 save_msa_upper 24, 0xc0, a0
485 save_msa_upper 25, 0xc8, a0
486 save_msa_upper 26, 0xd0, a0
487 save_msa_upper 27, 0xd8, a0
488 save_msa_upper 28, 0xe0, a0
489 save_msa_upper 29, 0xe8, a0
490 save_msa_upper 30, 0xf0, a0
491 save_msa_upper 31, 0xf8, a0
494 END(_save_msa_all_upper)
496 .macro restore_msa_upper wr, off, base
500 EX ld $1, \off(\base)
502 #elif defined(CONFIG_CPU_LITTLE_ENDIAN)
503 EX lw $1, \off(\base)
505 EX lw $1, (\off+4)(\base)
507 #else /* CONFIG_CPU_BIG_ENDIAN */
508 EX lw $1, (\off+4)(\base)
510 EX lw $1, \off(\base)
516 LEAF(_restore_msa_all_upper)
517 restore_msa_upper 0, 0x00, a0
518 restore_msa_upper 1, 0x08, a0
519 restore_msa_upper 2, 0x10, a0
520 restore_msa_upper 3, 0x18, a0
521 restore_msa_upper 4, 0x20, a0
522 restore_msa_upper 5, 0x28, a0
523 restore_msa_upper 6, 0x30, a0
524 restore_msa_upper 7, 0x38, a0
525 restore_msa_upper 8, 0x40, a0
526 restore_msa_upper 9, 0x48, a0
527 restore_msa_upper 10, 0x50, a0
528 restore_msa_upper 11, 0x58, a0
529 restore_msa_upper 12, 0x60, a0
530 restore_msa_upper 13, 0x68, a0
531 restore_msa_upper 14, 0x70, a0
532 restore_msa_upper 15, 0x78, a0
533 restore_msa_upper 16, 0x80, a0
534 restore_msa_upper 17, 0x88, a0
535 restore_msa_upper 18, 0x90, a0
536 restore_msa_upper 19, 0x98, a0
537 restore_msa_upper 20, 0xa0, a0
538 restore_msa_upper 21, 0xa8, a0
539 restore_msa_upper 22, 0xb0, a0
540 restore_msa_upper 23, 0xb8, a0
541 restore_msa_upper 24, 0xc0, a0
542 restore_msa_upper 25, 0xc8, a0
543 restore_msa_upper 26, 0xd0, a0
544 restore_msa_upper 27, 0xd8, a0
545 restore_msa_upper 28, 0xe0, a0
546 restore_msa_upper 29, 0xe8, a0
547 restore_msa_upper 30, 0xf0, a0
548 restore_msa_upper 31, 0xf8, a0
551 END(_restore_msa_all_upper)
553 #endif /* CONFIG_CPU_HAS_MSA */
557 .type fault, @function
559 fault: li v0, -EFAULT # failure