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review.evervolv.com / android_kernel_oneplus_msm8996 / a40a1bafe7da0afe61b1c20fc50e18c07ce724f9 / . / arch / mips / kernel / octeon_switch.S
blob: d52389672b06def47bd135992fecccd379f00ab3 [file] [log] [blame]
David Daney5b3b1682009-01-08 16:46:40 -0800[diff] [blame]1/*
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
4 * for more details.
5 *
6 * Copyright (C) 1994, 1995, 1996, 1998, 1999, 2002, 2003 Ralf Baechle
7 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
8 * Copyright (C) 1994, 1995, 1996, by Andreas Busse
9 * Copyright (C) 1999 Silicon Graphics, Inc.
10 * Copyright (C) 2000 MIPS Technologies, Inc.
11 * written by Carsten Langgaard, carstenl@mips.com
12 */
13#include <asm/asm.h>
14#include <asm/cachectl.h>
15#include <asm/fpregdef.h>
16#include <asm/mipsregs.h>
17#include <asm/asm-offsets.h>
18#include <asm/page.h>
19#include <asm/pgtable-bits.h>
20#include <asm/regdef.h>
21#include <asm/stackframe.h>
22#include <asm/thread_info.h>
23
24#include <asm/asmmacro.h>
25
26/*
27 * Offset to the current process status flags, the first 32 bytes of the
28 * stack are not used.
29 */
30#define ST_OFF (_THREAD_SIZE - 32 - PT_SIZE + PT_STATUS)
31
32/*
33 * task_struct *resume(task_struct *prev, task_struct *next,
34 * struct thread_info *next_ti)
35 */
36 .align 7
37 LEAF(resume)
38 .set arch=octeon
39#ifndef CONFIG_CPU_HAS_LLSC
40 sw zero, ll_bit
41#endif
42 mfc0 t1, CP0_STATUS
43 LONG_S t1, THREAD_STATUS(a0)
44 cpu_save_nonscratch a0
45 LONG_S ra, THREAD_REG31(a0)
46
47 /* check if we need to save COP2 registers */
48 PTR_L t2, TASK_THREAD_INFO(a0)
49 LONG_L t0, ST_OFF(t2)
50 bbit0 t0, 30, 1f
51
52 /* Disable COP2 in the stored process state */
53 li t1, ST0_CU2
54 xor t0, t1
55 LONG_S t0, ST_OFF(t2)
56
57 /* Enable COP2 so we can save it */
58 mfc0 t0, CP0_STATUS
59 or t0, t1
60 mtc0 t0, CP0_STATUS
61
62 /* Save COP2 */
63 daddu a0, THREAD_CP2
64 jal octeon_cop2_save
65 dsubu a0, THREAD_CP2
66
67 /* Disable COP2 now that we are done */
68 mfc0 t0, CP0_STATUS
69 li t1, ST0_CU2
70 xor t0, t1
71 mtc0 t0, CP0_STATUS
72
731:
74#if CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0
75 /* Check if we need to store CVMSEG state */
76 mfc0 t0, $11,7 /* CvmMemCtl */
77 bbit0 t0, 6, 3f /* Is user access enabled? */
78
79 /* Store the CVMSEG state */
80 /* Extract the size of CVMSEG */
81 andi t0, 0x3f
82 /* Multiply * (cache line size/sizeof(long)/2) */
83 sll t0, 7-LONGLOG-1
84 li t1, -32768 /* Base address of CVMSEG */
85 LONG_ADDI t2, a0, THREAD_CVMSEG /* Where to store CVMSEG to */
86 synciobdma
872:
88 .set noreorder
89 LONG_L t8, 0(t1) /* Load from CVMSEG */
90 subu t0, 1 /* Decrement loop var */
91 LONG_L t9, LONGSIZE(t1)/* Load from CVMSEG */
92 LONG_ADDU t1, LONGSIZE*2 /* Increment loc in CVMSEG */
93 LONG_S t8, 0(t2) /* Store CVMSEG to thread storage */
94 LONG_ADDU t2, LONGSIZE*2 /* Increment loc in thread storage */
95 bnez t0, 2b /* Loop until we've copied it all */
96 LONG_S t9, -LONGSIZE(t2)/* Store CVMSEG to thread storage */
97 .set reorder
98
99 /* Disable access to CVMSEG */
100 mfc0 t0, $11,7 /* CvmMemCtl */
101 xori t0, t0, 0x40 /* Bit 6 is CVMSEG user enable */
102 mtc0 t0, $11,7 /* CvmMemCtl */
103#endif
1043:
105 /*
106 * The order of restoring the registers takes care of the race
107 * updating $28, $29 and kernelsp without disabling ints.
108 */
109 move $28, a2
110 cpu_restore_nonscratch a1
111
112#if (_THREAD_SIZE - 32) < 0x8000
113 PTR_ADDIU t0, $28, _THREAD_SIZE - 32
114#else
115 PTR_LI t0, _THREAD_SIZE - 32
116 PTR_ADDU t0, $28
117#endif
118 set_saved_sp t0, t1, t2
119
120 mfc0 t1, CP0_STATUS /* Do we really need this? */
121 li a3, 0xff01
122 and t1, a3
123 LONG_L a2, THREAD_STATUS(a1)
124 nor a3, $0, a3
125 and a2, a3
126 or a2, t1
127 mtc0 a2, CP0_STATUS
128 move v0, a0
129 jr ra
130 END(resume)
131
132/*
133 * void octeon_cop2_save(struct octeon_cop2_state *a0)
134 */
135 .align 7
136 LEAF(octeon_cop2_save)
137
138 dmfc0 t9, $9,7 /* CvmCtl register. */
139
140 /* Save the COP2 CRC state */
141 dmfc2 t0, 0x0201
142 dmfc2 t1, 0x0202
143 dmfc2 t2, 0x0200
144 sd t0, OCTEON_CP2_CRC_IV(a0)
145 sd t1, OCTEON_CP2_CRC_LENGTH(a0)
146 sd t2, OCTEON_CP2_CRC_POLY(a0)
147 /* Skip next instructions if CvmCtl[NODFA_CP2] set */
148 bbit1 t9, 28, 1f
149
150 /* Save the LLM state */
151 dmfc2 t0, 0x0402
152 dmfc2 t1, 0x040A
153 sd t0, OCTEON_CP2_LLM_DAT(a0)
154 sd t1, OCTEON_CP2_LLM_DAT+8(a0)
155
1561: bbit1 t9, 26, 3f /* done if CvmCtl[NOCRYPTO] set */
157
158 /* Save the COP2 crypto state */
159 /* this part is mostly common to both pass 1 and later revisions */
160 dmfc2 t0, 0x0084
161 dmfc2 t1, 0x0080
162 dmfc2 t2, 0x0081
163 dmfc2 t3, 0x0082
164 sd t0, OCTEON_CP2_3DES_IV(a0)
165 dmfc2 t0, 0x0088
166 sd t1, OCTEON_CP2_3DES_KEY(a0)
167 dmfc2 t1, 0x0111 /* only necessary for pass 1 */
168 sd t2, OCTEON_CP2_3DES_KEY+8(a0)
169 dmfc2 t2, 0x0102
170 sd t3, OCTEON_CP2_3DES_KEY+16(a0)
171 dmfc2 t3, 0x0103
172 sd t0, OCTEON_CP2_3DES_RESULT(a0)
173 dmfc2 t0, 0x0104
174 sd t1, OCTEON_CP2_AES_INP0(a0) /* only necessary for pass 1 */
175 dmfc2 t1, 0x0105
176 sd t2, OCTEON_CP2_AES_IV(a0)
177 dmfc2 t2, 0x0106
178 sd t3, OCTEON_CP2_AES_IV+8(a0)
179 dmfc2 t3, 0x0107
180 sd t0, OCTEON_CP2_AES_KEY(a0)
181 dmfc2 t0, 0x0110
182 sd t1, OCTEON_CP2_AES_KEY+8(a0)
183 dmfc2 t1, 0x0100
184 sd t2, OCTEON_CP2_AES_KEY+16(a0)
185 dmfc2 t2, 0x0101
186 sd t3, OCTEON_CP2_AES_KEY+24(a0)
187 mfc0 t3, $15,0 /* Get the processor ID register */
188 sd t0, OCTEON_CP2_AES_KEYLEN(a0)
189 li t0, 0x000d0000 /* This is the processor ID of Octeon Pass1 */
190 sd t1, OCTEON_CP2_AES_RESULT(a0)
191 sd t2, OCTEON_CP2_AES_RESULT+8(a0)
192 /* Skip to the Pass1 version of the remainder of the COP2 state */
193 beq t3, t0, 2f
194
195 /* the non-pass1 state when !CvmCtl[NOCRYPTO] */
196 dmfc2 t1, 0x0240
197 dmfc2 t2, 0x0241
198 dmfc2 t3, 0x0242
199 dmfc2 t0, 0x0243
200 sd t1, OCTEON_CP2_HSH_DATW(a0)
201 dmfc2 t1, 0x0244
202 sd t2, OCTEON_CP2_HSH_DATW+8(a0)
203 dmfc2 t2, 0x0245
204 sd t3, OCTEON_CP2_HSH_DATW+16(a0)
205 dmfc2 t3, 0x0246
206 sd t0, OCTEON_CP2_HSH_DATW+24(a0)
207 dmfc2 t0, 0x0247
208 sd t1, OCTEON_CP2_HSH_DATW+32(a0)
209 dmfc2 t1, 0x0248
210 sd t2, OCTEON_CP2_HSH_DATW+40(a0)
211 dmfc2 t2, 0x0249
212 sd t3, OCTEON_CP2_HSH_DATW+48(a0)
213 dmfc2 t3, 0x024A
214 sd t0, OCTEON_CP2_HSH_DATW+56(a0)
215 dmfc2 t0, 0x024B
216 sd t1, OCTEON_CP2_HSH_DATW+64(a0)
217 dmfc2 t1, 0x024C
218 sd t2, OCTEON_CP2_HSH_DATW+72(a0)
219 dmfc2 t2, 0x024D
220 sd t3, OCTEON_CP2_HSH_DATW+80(a0)
221 dmfc2 t3, 0x024E
222 sd t0, OCTEON_CP2_HSH_DATW+88(a0)
223 dmfc2 t0, 0x0250
224 sd t1, OCTEON_CP2_HSH_DATW+96(a0)
225 dmfc2 t1, 0x0251
226 sd t2, OCTEON_CP2_HSH_DATW+104(a0)
227 dmfc2 t2, 0x0252
228 sd t3, OCTEON_CP2_HSH_DATW+112(a0)
229 dmfc2 t3, 0x0253
230 sd t0, OCTEON_CP2_HSH_IVW(a0)
231 dmfc2 t0, 0x0254
232 sd t1, OCTEON_CP2_HSH_IVW+8(a0)
233 dmfc2 t1, 0x0255
234 sd t2, OCTEON_CP2_HSH_IVW+16(a0)
235 dmfc2 t2, 0x0256
236 sd t3, OCTEON_CP2_HSH_IVW+24(a0)
237 dmfc2 t3, 0x0257
238 sd t0, OCTEON_CP2_HSH_IVW+32(a0)
239 dmfc2 t0, 0x0258
240 sd t1, OCTEON_CP2_HSH_IVW+40(a0)
241 dmfc2 t1, 0x0259
242 sd t2, OCTEON_CP2_HSH_IVW+48(a0)
243 dmfc2 t2, 0x025E
244 sd t3, OCTEON_CP2_HSH_IVW+56(a0)
245 dmfc2 t3, 0x025A
246 sd t0, OCTEON_CP2_GFM_MULT(a0)
247 dmfc2 t0, 0x025B
248 sd t1, OCTEON_CP2_GFM_MULT+8(a0)
249 sd t2, OCTEON_CP2_GFM_POLY(a0)
250 sd t3, OCTEON_CP2_GFM_RESULT(a0)
251 sd t0, OCTEON_CP2_GFM_RESULT+8(a0)
252 jr ra
253
2542: /* pass 1 special stuff when !CvmCtl[NOCRYPTO] */
255 dmfc2 t3, 0x0040
256 dmfc2 t0, 0x0041
257 dmfc2 t1, 0x0042
258 dmfc2 t2, 0x0043
259 sd t3, OCTEON_CP2_HSH_DATW(a0)
260 dmfc2 t3, 0x0044
261 sd t0, OCTEON_CP2_HSH_DATW+8(a0)
262 dmfc2 t0, 0x0045
263 sd t1, OCTEON_CP2_HSH_DATW+16(a0)
264 dmfc2 t1, 0x0046
265 sd t2, OCTEON_CP2_HSH_DATW+24(a0)
266 dmfc2 t2, 0x0048
267 sd t3, OCTEON_CP2_HSH_DATW+32(a0)
268 dmfc2 t3, 0x0049
269 sd t0, OCTEON_CP2_HSH_DATW+40(a0)
270 dmfc2 t0, 0x004A
271 sd t1, OCTEON_CP2_HSH_DATW+48(a0)
272 sd t2, OCTEON_CP2_HSH_IVW(a0)
273 sd t3, OCTEON_CP2_HSH_IVW+8(a0)
274 sd t0, OCTEON_CP2_HSH_IVW+16(a0)
275
2763: /* pass 1 or CvmCtl[NOCRYPTO] set */
277 jr ra
278 END(octeon_cop2_save)
279
280/*
281 * void octeon_cop2_restore(struct octeon_cop2_state *a0)
282 */
283 .align 7
284 .set push
285 .set noreorder
286 LEAF(octeon_cop2_restore)
287 /* First cache line was prefetched before the call */
288 pref 4, 128(a0)
289 dmfc0 t9, $9,7 /* CvmCtl register. */
290
291 pref 4, 256(a0)
292 ld t0, OCTEON_CP2_CRC_IV(a0)
293 pref 4, 384(a0)
294 ld t1, OCTEON_CP2_CRC_LENGTH(a0)
295 ld t2, OCTEON_CP2_CRC_POLY(a0)
296
297 /* Restore the COP2 CRC state */
298 dmtc2 t0, 0x0201
299 dmtc2 t1, 0x1202
300 bbit1 t9, 28, 2f /* Skip LLM if CvmCtl[NODFA_CP2] is set */
301 dmtc2 t2, 0x4200
302
303 /* Restore the LLM state */
304 ld t0, OCTEON_CP2_LLM_DAT(a0)
305 ld t1, OCTEON_CP2_LLM_DAT+8(a0)
306 dmtc2 t0, 0x0402
307 dmtc2 t1, 0x040A
308
3092:
310 bbit1 t9, 26, done_restore /* done if CvmCtl[NOCRYPTO] set */
311 nop
312
313 /* Restore the COP2 crypto state common to pass 1 and pass 2 */
314 ld t0, OCTEON_CP2_3DES_IV(a0)
315 ld t1, OCTEON_CP2_3DES_KEY(a0)
316 ld t2, OCTEON_CP2_3DES_KEY+8(a0)
317 dmtc2 t0, 0x0084
318 ld t0, OCTEON_CP2_3DES_KEY+16(a0)
319 dmtc2 t1, 0x0080
320 ld t1, OCTEON_CP2_3DES_RESULT(a0)
321 dmtc2 t2, 0x0081
322 ld t2, OCTEON_CP2_AES_INP0(a0) /* only really needed for pass 1 */
323 dmtc2 t0, 0x0082
324 ld t0, OCTEON_CP2_AES_IV(a0)
325 dmtc2 t1, 0x0098
326 ld t1, OCTEON_CP2_AES_IV+8(a0)
327 dmtc2 t2, 0x010A /* only really needed for pass 1 */
328 ld t2, OCTEON_CP2_AES_KEY(a0)
329 dmtc2 t0, 0x0102
330 ld t0, OCTEON_CP2_AES_KEY+8(a0)
331 dmtc2 t1, 0x0103
332 ld t1, OCTEON_CP2_AES_KEY+16(a0)
333 dmtc2 t2, 0x0104
334 ld t2, OCTEON_CP2_AES_KEY+24(a0)
335 dmtc2 t0, 0x0105
336 ld t0, OCTEON_CP2_AES_KEYLEN(a0)
337 dmtc2 t1, 0x0106
338 ld t1, OCTEON_CP2_AES_RESULT(a0)
339 dmtc2 t2, 0x0107
340 ld t2, OCTEON_CP2_AES_RESULT+8(a0)
341 mfc0 t3, $15,0 /* Get the processor ID register */
342 dmtc2 t0, 0x0110
343 li t0, 0x000d0000 /* This is the processor ID of Octeon Pass1 */
344 dmtc2 t1, 0x0100
345 bne t0, t3, 3f /* Skip the next stuff for non-pass1 */
346 dmtc2 t2, 0x0101
347
348 /* this code is specific for pass 1 */
349 ld t0, OCTEON_CP2_HSH_DATW(a0)
350 ld t1, OCTEON_CP2_HSH_DATW+8(a0)
351 ld t2, OCTEON_CP2_HSH_DATW+16(a0)
352 dmtc2 t0, 0x0040
353 ld t0, OCTEON_CP2_HSH_DATW+24(a0)
354 dmtc2 t1, 0x0041
355 ld t1, OCTEON_CP2_HSH_DATW+32(a0)
356 dmtc2 t2, 0x0042
357 ld t2, OCTEON_CP2_HSH_DATW+40(a0)
358 dmtc2 t0, 0x0043
359 ld t0, OCTEON_CP2_HSH_DATW+48(a0)
360 dmtc2 t1, 0x0044
361 ld t1, OCTEON_CP2_HSH_IVW(a0)
362 dmtc2 t2, 0x0045
363 ld t2, OCTEON_CP2_HSH_IVW+8(a0)
364 dmtc2 t0, 0x0046
365 ld t0, OCTEON_CP2_HSH_IVW+16(a0)
366 dmtc2 t1, 0x0048
367 dmtc2 t2, 0x0049
368 b done_restore /* unconditional branch */
369 dmtc2 t0, 0x004A
370
3713: /* this is post-pass1 code */
372 ld t2, OCTEON_CP2_HSH_DATW(a0)
373 ld t0, OCTEON_CP2_HSH_DATW+8(a0)
374 ld t1, OCTEON_CP2_HSH_DATW+16(a0)
375 dmtc2 t2, 0x0240
376 ld t2, OCTEON_CP2_HSH_DATW+24(a0)
377 dmtc2 t0, 0x0241
378 ld t0, OCTEON_CP2_HSH_DATW+32(a0)
379 dmtc2 t1, 0x0242
380 ld t1, OCTEON_CP2_HSH_DATW+40(a0)
381 dmtc2 t2, 0x0243
382 ld t2, OCTEON_CP2_HSH_DATW+48(a0)
383 dmtc2 t0, 0x0244
384 ld t0, OCTEON_CP2_HSH_DATW+56(a0)
385 dmtc2 t1, 0x0245
386 ld t1, OCTEON_CP2_HSH_DATW+64(a0)
387 dmtc2 t2, 0x0246
388 ld t2, OCTEON_CP2_HSH_DATW+72(a0)
389 dmtc2 t0, 0x0247
390 ld t0, OCTEON_CP2_HSH_DATW+80(a0)
391 dmtc2 t1, 0x0248
392 ld t1, OCTEON_CP2_HSH_DATW+88(a0)
393 dmtc2 t2, 0x0249
394 ld t2, OCTEON_CP2_HSH_DATW+96(a0)
395 dmtc2 t0, 0x024A
396 ld t0, OCTEON_CP2_HSH_DATW+104(a0)
397 dmtc2 t1, 0x024B
398 ld t1, OCTEON_CP2_HSH_DATW+112(a0)
399 dmtc2 t2, 0x024C
400 ld t2, OCTEON_CP2_HSH_IVW(a0)
401 dmtc2 t0, 0x024D
402 ld t0, OCTEON_CP2_HSH_IVW+8(a0)
403 dmtc2 t1, 0x024E
404 ld t1, OCTEON_CP2_HSH_IVW+16(a0)
405 dmtc2 t2, 0x0250
406 ld t2, OCTEON_CP2_HSH_IVW+24(a0)
407 dmtc2 t0, 0x0251
408 ld t0, OCTEON_CP2_HSH_IVW+32(a0)
409 dmtc2 t1, 0x0252
410 ld t1, OCTEON_CP2_HSH_IVW+40(a0)
411 dmtc2 t2, 0x0253
412 ld t2, OCTEON_CP2_HSH_IVW+48(a0)
413 dmtc2 t0, 0x0254
414 ld t0, OCTEON_CP2_HSH_IVW+56(a0)
415 dmtc2 t1, 0x0255
416 ld t1, OCTEON_CP2_GFM_MULT(a0)
417 dmtc2 t2, 0x0256
418 ld t2, OCTEON_CP2_GFM_MULT+8(a0)
419 dmtc2 t0, 0x0257
420 ld t0, OCTEON_CP2_GFM_POLY(a0)
421 dmtc2 t1, 0x0258
422 ld t1, OCTEON_CP2_GFM_RESULT(a0)
423 dmtc2 t2, 0x0259
424 ld t2, OCTEON_CP2_GFM_RESULT+8(a0)
425 dmtc2 t0, 0x025E
426 dmtc2 t1, 0x025A
427 dmtc2 t2, 0x025B
428
429done_restore:
430 jr ra
431 nop
432 END(octeon_cop2_restore)
433 .set pop
434
435/*
436 * void octeon_mult_save()
437 * sp is assumed to point to a struct pt_regs
438 *
439 * NOTE: This is called in SAVE_SOME in stackframe.h. It can only
440 * safely modify k0 and k1.
441 */
442 .align 7
443 .set push
444 .set noreorder
445 LEAF(octeon_mult_save)
446 dmfc0 k0, $9,7 /* CvmCtl register. */
447 bbit1 k0, 27, 1f /* Skip CvmCtl[NOMUL] */
448 nop
449
450 /* Save the multiplier state */
451 v3mulu k0, $0, $0
452 v3mulu k1, $0, $0
453 sd k0, PT_MTP(sp) /* PT_MTP has P0 */
454 v3mulu k0, $0, $0
455 sd k1, PT_MTP+8(sp) /* PT_MTP+8 has P1 */
456 ori k1, $0, 1
457 v3mulu k1, k1, $0
458 sd k0, PT_MTP+16(sp) /* PT_MTP+16 has P2 */
459 v3mulu k0, $0, $0
460 sd k1, PT_MPL(sp) /* PT_MPL has MPL0 */
461 v3mulu k1, $0, $0
462 sd k0, PT_MPL+8(sp) /* PT_MPL+8 has MPL1 */
463 jr ra
464 sd k1, PT_MPL+16(sp) /* PT_MPL+16 has MPL2 */
465
4661: /* Resume here if CvmCtl[NOMUL] */
467 jr ra
468 END(octeon_mult_save)
469 .set pop
470
471/*
472 * void octeon_mult_restore()
473 * sp is assumed to point to a struct pt_regs
474 *
475 * NOTE: This is called in RESTORE_SOME in stackframe.h.
476 */
477 .align 7
478 .set push
479 .set noreorder
480 LEAF(octeon_mult_restore)
481 dmfc0 k1, $9,7 /* CvmCtl register. */
482 ld v0, PT_MPL(sp) /* MPL0 */
483 ld v1, PT_MPL+8(sp) /* MPL1 */
484 ld k0, PT_MPL+16(sp) /* MPL2 */
485 bbit1 k1, 27, 1f /* Skip CvmCtl[NOMUL] */
486 /* Normally falls through, so no time wasted here */
487 nop
488
489 /* Restore the multiplier state */
490 ld k1, PT_MTP+16(sp) /* P2 */
491 MTM0 v0 /* MPL0 */
492 ld v0, PT_MTP+8(sp) /* P1 */
493 MTM1 v1 /* MPL1 */
494 ld v1, PT_MTP(sp) /* P0 */
495 MTM2 k0 /* MPL2 */
496 MTP2 k1 /* P2 */
497 MTP1 v0 /* P1 */
498 jr ra
499 MTP0 v1 /* P0 */
500
5011: /* Resume here if CvmCtl[NOMUL] */
502 jr ra
503 nop
504 END(octeon_mult_restore)
505 .set pop
506