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review.trustedfirmware.org / hafnium / third_party / linux.git / 157378f43faad830e4aa3815bde5fa9f9a9f5be6 / . / arch / sparc / kernel / cherrs.S
blob: 7f3d3d264390ca36e7fd9466a86dc52afe9759e0 [file] [log] [blame]
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]1/* SPDX-License-Identifier: GPL-2.0 */
2 /* These get patched into the trap table at boot time
3 * once we know we have a cheetah processor.
4 */
5 .globl cheetah_fecc_trap_vector
6 .type cheetah_fecc_trap_vector,#function
7cheetah_fecc_trap_vector:
8 membar #Sync
9 ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
10 andn %g1, DCU_DC | DCU_IC, %g1
11 stxa %g1, [%g0] ASI_DCU_CONTROL_REG
12 membar #Sync
13 sethi %hi(cheetah_fast_ecc), %g2
14 jmpl %g2 + %lo(cheetah_fast_ecc), %g0
15 mov 0, %g1
16 .size cheetah_fecc_trap_vector,.-cheetah_fecc_trap_vector
17
18 .globl cheetah_fecc_trap_vector_tl1
19 .type cheetah_fecc_trap_vector_tl1,#function
20cheetah_fecc_trap_vector_tl1:
21 membar #Sync
22 ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
23 andn %g1, DCU_DC | DCU_IC, %g1
24 stxa %g1, [%g0] ASI_DCU_CONTROL_REG
25 membar #Sync
26 sethi %hi(cheetah_fast_ecc), %g2
27 jmpl %g2 + %lo(cheetah_fast_ecc), %g0
28 mov 1, %g1
29 .size cheetah_fecc_trap_vector_tl1,.-cheetah_fecc_trap_vector_tl1
30
31 .globl cheetah_cee_trap_vector
32 .type cheetah_cee_trap_vector,#function
33cheetah_cee_trap_vector:
34 membar #Sync
35 ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
36 andn %g1, DCU_IC, %g1
37 stxa %g1, [%g0] ASI_DCU_CONTROL_REG
38 membar #Sync
39 sethi %hi(cheetah_cee), %g2
40 jmpl %g2 + %lo(cheetah_cee), %g0
41 mov 0, %g1
42 .size cheetah_cee_trap_vector,.-cheetah_cee_trap_vector
43
44 .globl cheetah_cee_trap_vector_tl1
45 .type cheetah_cee_trap_vector_tl1,#function
46cheetah_cee_trap_vector_tl1:
47 membar #Sync
48 ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
49 andn %g1, DCU_IC, %g1
50 stxa %g1, [%g0] ASI_DCU_CONTROL_REG
51 membar #Sync
52 sethi %hi(cheetah_cee), %g2
53 jmpl %g2 + %lo(cheetah_cee), %g0
54 mov 1, %g1
55 .size cheetah_cee_trap_vector_tl1,.-cheetah_cee_trap_vector_tl1
56
57 .globl cheetah_deferred_trap_vector
58 .type cheetah_deferred_trap_vector,#function
59cheetah_deferred_trap_vector:
60 membar #Sync
61 ldxa [%g0] ASI_DCU_CONTROL_REG, %g1;
62 andn %g1, DCU_DC | DCU_IC, %g1;
63 stxa %g1, [%g0] ASI_DCU_CONTROL_REG;
64 membar #Sync;
65 sethi %hi(cheetah_deferred_trap), %g2
66 jmpl %g2 + %lo(cheetah_deferred_trap), %g0
67 mov 0, %g1
68 .size cheetah_deferred_trap_vector,.-cheetah_deferred_trap_vector
69
70 .globl cheetah_deferred_trap_vector_tl1
71 .type cheetah_deferred_trap_vector_tl1,#function
72cheetah_deferred_trap_vector_tl1:
73 membar #Sync;
74 ldxa [%g0] ASI_DCU_CONTROL_REG, %g1;
75 andn %g1, DCU_DC | DCU_IC, %g1;
76 stxa %g1, [%g0] ASI_DCU_CONTROL_REG;
77 membar #Sync;
78 sethi %hi(cheetah_deferred_trap), %g2
79 jmpl %g2 + %lo(cheetah_deferred_trap), %g0
80 mov 1, %g1
81 .size cheetah_deferred_trap_vector_tl1,.-cheetah_deferred_trap_vector_tl1
82
83 /* Cheetah+ specific traps. These are for the new I/D cache parity
84 * error traps. The first argument to cheetah_plus_parity_handler
85 * is encoded as follows:
86 *
87 * Bit0: 0=dcache,1=icache
88 * Bit1: 0=recoverable,1=unrecoverable
89 */
90 .globl cheetah_plus_dcpe_trap_vector
91 .type cheetah_plus_dcpe_trap_vector,#function
92cheetah_plus_dcpe_trap_vector:
93 membar #Sync
94 sethi %hi(do_cheetah_plus_data_parity), %g7
95 jmpl %g7 + %lo(do_cheetah_plus_data_parity), %g0
96 nop
97 nop
98 nop
99 nop
100 nop
101 .size cheetah_plus_dcpe_trap_vector,.-cheetah_plus_dcpe_trap_vector
102
103 .type do_cheetah_plus_data_parity,#function
104do_cheetah_plus_data_parity:
105 rdpr %pil, %g2
106 wrpr %g0, PIL_NORMAL_MAX, %pil
107 ba,pt %xcc, etrap_irq
108 rd %pc, %g7
109#ifdef CONFIG_TRACE_IRQFLAGS
110 call trace_hardirqs_off
111 nop
112#endif
113 mov 0x0, %o0
114 call cheetah_plus_parity_error
115 add %sp, PTREGS_OFF, %o1
116 ba,a,pt %xcc, rtrap_irq
117 .size do_cheetah_plus_data_parity,.-do_cheetah_plus_data_parity
118
119 .globl cheetah_plus_dcpe_trap_vector_tl1
120 .type cheetah_plus_dcpe_trap_vector_tl1,#function
121cheetah_plus_dcpe_trap_vector_tl1:
122 membar #Sync
123 wrpr PSTATE_IG | PSTATE_PEF | PSTATE_PRIV, %pstate
124 sethi %hi(do_dcpe_tl1), %g3
125 jmpl %g3 + %lo(do_dcpe_tl1), %g0
126 nop
127 nop
128 nop
129 nop
130 .size cheetah_plus_dcpe_trap_vector_tl1,.-cheetah_plus_dcpe_trap_vector_tl1
131
132 .globl cheetah_plus_icpe_trap_vector
133 .type cheetah_plus_icpe_trap_vector,#function
134cheetah_plus_icpe_trap_vector:
135 membar #Sync
136 sethi %hi(do_cheetah_plus_insn_parity), %g7
137 jmpl %g7 + %lo(do_cheetah_plus_insn_parity), %g0
138 nop
139 nop
140 nop
141 nop
142 nop
143 .size cheetah_plus_icpe_trap_vector,.-cheetah_plus_icpe_trap_vector
144
145 .type do_cheetah_plus_insn_parity,#function
146do_cheetah_plus_insn_parity:
147 rdpr %pil, %g2
148 wrpr %g0, PIL_NORMAL_MAX, %pil
149 ba,pt %xcc, etrap_irq
150 rd %pc, %g7
151#ifdef CONFIG_TRACE_IRQFLAGS
152 call trace_hardirqs_off
153 nop
154#endif
155 mov 0x1, %o0
156 call cheetah_plus_parity_error
157 add %sp, PTREGS_OFF, %o1
158 ba,a,pt %xcc, rtrap_irq
159 .size do_cheetah_plus_insn_parity,.-do_cheetah_plus_insn_parity
160
161 .globl cheetah_plus_icpe_trap_vector_tl1
162 .type cheetah_plus_icpe_trap_vector_tl1,#function
163cheetah_plus_icpe_trap_vector_tl1:
164 membar #Sync
165 wrpr PSTATE_IG | PSTATE_PEF | PSTATE_PRIV, %pstate
166 sethi %hi(do_icpe_tl1), %g3
167 jmpl %g3 + %lo(do_icpe_tl1), %g0
168 nop
169 nop
170 nop
171 nop
172 .size cheetah_plus_icpe_trap_vector_tl1,.-cheetah_plus_icpe_trap_vector_tl1
173
174 /* If we take one of these traps when tl >= 1, then we
175 * jump to interrupt globals. If some trap level above us
176 * was also using interrupt globals, we cannot recover.
177 * We may use all interrupt global registers except %g6.
178 */
179 .globl do_dcpe_tl1
180 .type do_dcpe_tl1,#function
181do_dcpe_tl1:
182 rdpr %tl, %g1 ! Save original trap level
183 mov 1, %g2 ! Setup TSTATE checking loop
184 sethi %hi(TSTATE_IG), %g3 ! TSTATE mask bit
1851: wrpr %g2, %tl ! Set trap level to check
186 rdpr %tstate, %g4 ! Read TSTATE for this level
187 andcc %g4, %g3, %g0 ! Interrupt globals in use?
188 bne,a,pn %xcc, do_dcpe_tl1_fatal ! Yep, irrecoverable
189 wrpr %g1, %tl ! Restore original trap level
190 add %g2, 1, %g2 ! Next trap level
191 cmp %g2, %g1 ! Hit them all yet?
192 ble,pt %icc, 1b ! Not yet
193 nop
194 wrpr %g1, %tl ! Restore original trap level
195do_dcpe_tl1_nonfatal: /* Ok we may use interrupt globals safely. */
196 sethi %hi(dcache_parity_tl1_occurred), %g2
197 lduw [%g2 + %lo(dcache_parity_tl1_occurred)], %g1
198 add %g1, 1, %g1
199 stw %g1, [%g2 + %lo(dcache_parity_tl1_occurred)]
200 /* Reset D-cache parity */
201 sethi %hi(1 << 16), %g1 ! D-cache size
202 mov (1 << 5), %g2 ! D-cache line size
203 sub %g1, %g2, %g1 ! Move down 1 cacheline
2041: srl %g1, 14, %g3 ! Compute UTAG
205 membar #Sync
206 stxa %g3, [%g1] ASI_DCACHE_UTAG
207 membar #Sync
208 sub %g2, 8, %g3 ! 64-bit data word within line
2092: membar #Sync
210 stxa %g0, [%g1 + %g3] ASI_DCACHE_DATA
211 membar #Sync
212 subcc %g3, 8, %g3 ! Next 64-bit data word
213 bge,pt %icc, 2b
214 nop
215 subcc %g1, %g2, %g1 ! Next cacheline
216 bge,pt %icc, 1b
217 nop
218 ba,a,pt %xcc, dcpe_icpe_tl1_common
219
220do_dcpe_tl1_fatal:
221 sethi %hi(1f), %g7
222 ba,pt %xcc, etraptl1
2231: or %g7, %lo(1b), %g7
224 mov 0x2, %o0
225 call cheetah_plus_parity_error
226 add %sp, PTREGS_OFF, %o1
227 ba,a,pt %xcc, rtrap
228 .size do_dcpe_tl1,.-do_dcpe_tl1
229
230 .globl do_icpe_tl1
231 .type do_icpe_tl1,#function
232do_icpe_tl1:
233 rdpr %tl, %g1 ! Save original trap level
234 mov 1, %g2 ! Setup TSTATE checking loop
235 sethi %hi(TSTATE_IG), %g3 ! TSTATE mask bit
2361: wrpr %g2, %tl ! Set trap level to check
237 rdpr %tstate, %g4 ! Read TSTATE for this level
238 andcc %g4, %g3, %g0 ! Interrupt globals in use?
239 bne,a,pn %xcc, do_icpe_tl1_fatal ! Yep, irrecoverable
240 wrpr %g1, %tl ! Restore original trap level
241 add %g2, 1, %g2 ! Next trap level
242 cmp %g2, %g1 ! Hit them all yet?
243 ble,pt %icc, 1b ! Not yet
244 nop
245 wrpr %g1, %tl ! Restore original trap level
246do_icpe_tl1_nonfatal: /* Ok we may use interrupt globals safely. */
247 sethi %hi(icache_parity_tl1_occurred), %g2
248 lduw [%g2 + %lo(icache_parity_tl1_occurred)], %g1
249 add %g1, 1, %g1
250 stw %g1, [%g2 + %lo(icache_parity_tl1_occurred)]
251 /* Flush I-cache */
252 sethi %hi(1 << 15), %g1 ! I-cache size
253 mov (1 << 5), %g2 ! I-cache line size
254 sub %g1, %g2, %g1
2551: or %g1, (2 << 3), %g3
256 stxa %g0, [%g3] ASI_IC_TAG
257 membar #Sync
258 subcc %g1, %g2, %g1
259 bge,pt %icc, 1b
260 nop
261 ba,a,pt %xcc, dcpe_icpe_tl1_common
262
263do_icpe_tl1_fatal:
264 sethi %hi(1f), %g7
265 ba,pt %xcc, etraptl1
2661: or %g7, %lo(1b), %g7
267 mov 0x3, %o0
268 call cheetah_plus_parity_error
269 add %sp, PTREGS_OFF, %o1
270 ba,a,pt %xcc, rtrap
271 .size do_icpe_tl1,.-do_icpe_tl1
272
273 .type dcpe_icpe_tl1_common,#function
274dcpe_icpe_tl1_common:
275 /* Flush D-cache, re-enable D/I caches in DCU and finally
276 * retry the trapping instruction.
277 */
278 sethi %hi(1 << 16), %g1 ! D-cache size
279 mov (1 << 5), %g2 ! D-cache line size
280 sub %g1, %g2, %g1
2811: stxa %g0, [%g1] ASI_DCACHE_TAG
282 membar #Sync
283 subcc %g1, %g2, %g1
284 bge,pt %icc, 1b
285 nop
286 ldxa [%g0] ASI_DCU_CONTROL_REG, %g1
287 or %g1, (DCU_DC | DCU_IC), %g1
288 stxa %g1, [%g0] ASI_DCU_CONTROL_REG
289 membar #Sync
290 retry
291 .size dcpe_icpe_tl1_common,.-dcpe_icpe_tl1_common
292
293 /* Capture I/D/E-cache state into per-cpu error scoreboard.
294 *
295 * %g1: (TL>=0) ? 1 : 0
296 * %g2: scratch
297 * %g3: scratch
298 * %g4: AFSR
299 * %g5: AFAR
300 * %g6: unused, will have current thread ptr after etrap
301 * %g7: scratch
302 */
303 .type __cheetah_log_error,#function
304__cheetah_log_error:
305 /* Put "TL1" software bit into AFSR. */
306 and %g1, 0x1, %g1
307 sllx %g1, 63, %g2
308 or %g4, %g2, %g4
309
310 /* Get log entry pointer for this cpu at this trap level. */
311 BRANCH_IF_JALAPENO(g2,g3,50f)
312 ldxa [%g0] ASI_SAFARI_CONFIG, %g2
313 srlx %g2, 17, %g2
314 ba,pt %xcc, 60f
315 and %g2, 0x3ff, %g2
316
31750: ldxa [%g0] ASI_JBUS_CONFIG, %g2
318 srlx %g2, 17, %g2
319 and %g2, 0x1f, %g2
320
32160: sllx %g2, 9, %g2
322 sethi %hi(cheetah_error_log), %g3
323 ldx [%g3 + %lo(cheetah_error_log)], %g3
324 brz,pn %g3, 80f
325 nop
326
327 add %g3, %g2, %g3
328 sllx %g1, 8, %g1
329 add %g3, %g1, %g1
330
331 /* %g1 holds pointer to the top of the logging scoreboard */
332 ldx [%g1 + 0x0], %g7
333 cmp %g7, -1
334 bne,pn %xcc, 80f
335 nop
336
337 stx %g4, [%g1 + 0x0]
338 stx %g5, [%g1 + 0x8]
339 add %g1, 0x10, %g1
340
341 /* %g1 now points to D-cache logging area */
342 set 0x3ff8, %g2 /* DC_addr mask */
343 and %g5, %g2, %g2 /* DC_addr bits of AFAR */
344 srlx %g5, 12, %g3
345 or %g3, 1, %g3 /* PHYS tag + valid */
346
34710: ldxa [%g2] ASI_DCACHE_TAG, %g7
348 cmp %g3, %g7 /* TAG match? */
349 bne,pt %xcc, 13f
350 nop
351
352 /* Yep, what we want, capture state. */
353 stx %g2, [%g1 + 0x20]
354 stx %g7, [%g1 + 0x28]
355
356 /* A membar Sync is required before and after utag access. */
357 membar #Sync
358 ldxa [%g2] ASI_DCACHE_UTAG, %g7
359 membar #Sync
360 stx %g7, [%g1 + 0x30]
361 ldxa [%g2] ASI_DCACHE_SNOOP_TAG, %g7
362 stx %g7, [%g1 + 0x38]
363 clr %g3
364
36512: ldxa [%g2 + %g3] ASI_DCACHE_DATA, %g7
366 stx %g7, [%g1]
367 add %g3, (1 << 5), %g3
368 cmp %g3, (4 << 5)
369 bl,pt %xcc, 12b
370 add %g1, 0x8, %g1
371
372 ba,pt %xcc, 20f
373 add %g1, 0x20, %g1
374
37513: sethi %hi(1 << 14), %g7
376 add %g2, %g7, %g2
377 srlx %g2, 14, %g7
378 cmp %g7, 4
379 bl,pt %xcc, 10b
380 nop
381
382 add %g1, 0x40, %g1
383
384 /* %g1 now points to I-cache logging area */
38520: set 0x1fe0, %g2 /* IC_addr mask */
386 and %g5, %g2, %g2 /* IC_addr bits of AFAR */
387 sllx %g2, 1, %g2 /* IC_addr[13:6]==VA[12:5] */
388 srlx %g5, (13 - 8), %g3 /* Make PTAG */
389 andn %g3, 0xff, %g3 /* Mask off undefined bits */
390
39121: ldxa [%g2] ASI_IC_TAG, %g7
392 andn %g7, 0xff, %g7
393 cmp %g3, %g7
394 bne,pt %xcc, 23f
395 nop
396
397 /* Yep, what we want, capture state. */
398 stx %g2, [%g1 + 0x40]
399 stx %g7, [%g1 + 0x48]
400 add %g2, (1 << 3), %g2
401 ldxa [%g2] ASI_IC_TAG, %g7
402 add %g2, (1 << 3), %g2
403 stx %g7, [%g1 + 0x50]
404 ldxa [%g2] ASI_IC_TAG, %g7
405 add %g2, (1 << 3), %g2
406 stx %g7, [%g1 + 0x60]
407 ldxa [%g2] ASI_IC_TAG, %g7
408 stx %g7, [%g1 + 0x68]
409 sub %g2, (3 << 3), %g2
410 ldxa [%g2] ASI_IC_STAG, %g7
411 stx %g7, [%g1 + 0x58]
412 clr %g3
413 srlx %g2, 2, %g2
414
41522: ldxa [%g2 + %g3] ASI_IC_INSTR, %g7
416 stx %g7, [%g1]
417 add %g3, (1 << 3), %g3
418 cmp %g3, (8 << 3)
419 bl,pt %xcc, 22b
420 add %g1, 0x8, %g1
421
422 ba,pt %xcc, 30f
423 add %g1, 0x30, %g1
424
42523: sethi %hi(1 << 14), %g7
426 add %g2, %g7, %g2
427 srlx %g2, 14, %g7
428 cmp %g7, 4
429 bl,pt %xcc, 21b
430 nop
431
432 add %g1, 0x70, %g1
433
434 /* %g1 now points to E-cache logging area */
43530: andn %g5, (32 - 1), %g2
436 stx %g2, [%g1 + 0x20]
437 ldxa [%g2] ASI_EC_TAG_DATA, %g7
438 stx %g7, [%g1 + 0x28]
439 ldxa [%g2] ASI_EC_R, %g0
440 clr %g3
441
44231: ldxa [%g3] ASI_EC_DATA, %g7
443 stx %g7, [%g1 + %g3]
444 add %g3, 0x8, %g3
445 cmp %g3, 0x20
446
447 bl,pt %xcc, 31b
448 nop
44980:
450 rdpr %tt, %g2
451 cmp %g2, 0x70
452 be c_fast_ecc
453 cmp %g2, 0x63
454 be c_cee
455 nop
456 ba,a,pt %xcc, c_deferred
457 .size __cheetah_log_error,.-__cheetah_log_error
458
459 /* Cheetah FECC trap handling, we get here from tl{0,1}_fecc
460 * in the trap table. That code has done a memory barrier
461 * and has disabled both the I-cache and D-cache in the DCU
462 * control register. The I-cache is disabled so that we may
463 * capture the corrupted cache line, and the D-cache is disabled
464 * because corrupt data may have been placed there and we don't
465 * want to reference it.
466 *
467 * %g1 is one if this trap occurred at %tl >= 1.
468 *
469 * Next, we turn off error reporting so that we don't recurse.
470 */
471 .globl cheetah_fast_ecc
472 .type cheetah_fast_ecc,#function
473cheetah_fast_ecc:
474 ldxa [%g0] ASI_ESTATE_ERROR_EN, %g2
475 andn %g2, ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN, %g2
476 stxa %g2, [%g0] ASI_ESTATE_ERROR_EN
477 membar #Sync
478
479 /* Fetch and clear AFSR/AFAR */
480 ldxa [%g0] ASI_AFSR, %g4
481 ldxa [%g0] ASI_AFAR, %g5
482 stxa %g4, [%g0] ASI_AFSR
483 membar #Sync
484
485 ba,pt %xcc, __cheetah_log_error
486 nop
487 .size cheetah_fast_ecc,.-cheetah_fast_ecc
488
489 .type c_fast_ecc,#function
490c_fast_ecc:
491 rdpr %pil, %g2
492 wrpr %g0, PIL_NORMAL_MAX, %pil
493 ba,pt %xcc, etrap_irq
494 rd %pc, %g7
495#ifdef CONFIG_TRACE_IRQFLAGS
496 call trace_hardirqs_off
497 nop
498#endif
499 mov %l4, %o1
500 mov %l5, %o2
501 call cheetah_fecc_handler
502 add %sp, PTREGS_OFF, %o0
503 ba,a,pt %xcc, rtrap_irq
504 .size c_fast_ecc,.-c_fast_ecc
505
506 /* Our caller has disabled I-cache and performed membar Sync. */
507 .globl cheetah_cee
508 .type cheetah_cee,#function
509cheetah_cee:
510 ldxa [%g0] ASI_ESTATE_ERROR_EN, %g2
511 andn %g2, ESTATE_ERROR_CEEN, %g2
512 stxa %g2, [%g0] ASI_ESTATE_ERROR_EN
513 membar #Sync
514
515 /* Fetch and clear AFSR/AFAR */
516 ldxa [%g0] ASI_AFSR, %g4
517 ldxa [%g0] ASI_AFAR, %g5
518 stxa %g4, [%g0] ASI_AFSR
519 membar #Sync
520
521 ba,pt %xcc, __cheetah_log_error
522 nop
523 .size cheetah_cee,.-cheetah_cee
524
525 .type c_cee,#function
526c_cee:
527 rdpr %pil, %g2
528 wrpr %g0, PIL_NORMAL_MAX, %pil
529 ba,pt %xcc, etrap_irq
530 rd %pc, %g7
531#ifdef CONFIG_TRACE_IRQFLAGS
532 call trace_hardirqs_off
533 nop
534#endif
535 mov %l4, %o1
536 mov %l5, %o2
537 call cheetah_cee_handler
538 add %sp, PTREGS_OFF, %o0
539 ba,a,pt %xcc, rtrap_irq
540 .size c_cee,.-c_cee
541
542 /* Our caller has disabled I-cache+D-cache and performed membar Sync. */
543 .globl cheetah_deferred_trap
544 .type cheetah_deferred_trap,#function
545cheetah_deferred_trap:
546 ldxa [%g0] ASI_ESTATE_ERROR_EN, %g2
547 andn %g2, ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN, %g2
548 stxa %g2, [%g0] ASI_ESTATE_ERROR_EN
549 membar #Sync
550
551 /* Fetch and clear AFSR/AFAR */
552 ldxa [%g0] ASI_AFSR, %g4
553 ldxa [%g0] ASI_AFAR, %g5
554 stxa %g4, [%g0] ASI_AFSR
555 membar #Sync
556
557 ba,pt %xcc, __cheetah_log_error
558 nop
559 .size cheetah_deferred_trap,.-cheetah_deferred_trap
560
561 .type c_deferred,#function
562c_deferred:
563 rdpr %pil, %g2
564 wrpr %g0, PIL_NORMAL_MAX, %pil
565 ba,pt %xcc, etrap_irq
566 rd %pc, %g7
567#ifdef CONFIG_TRACE_IRQFLAGS
568 call trace_hardirqs_off
569 nop
570#endif
571 mov %l4, %o1
572 mov %l5, %o2
573 call cheetah_deferred_handler
574 add %sp, PTREGS_OFF, %o0
575 ba,a,pt %xcc, rtrap_irq
576 .size c_deferred,.-c_deferred