]>
Commit | Line | Data |
---|---|---|
5a0015d6 CZ |
1 | /* |
2 | * arch/xtensa/kernel/vectors.S | |
3 | * | |
4 | * This file contains all exception vectors (user, kernel, and double), | |
5 | * as well as the window vectors (overflow and underflow), and the debug | |
6 | * vector. These are the primary vectors executed by the processor if an | |
7 | * exception occurs. | |
8 | * | |
9 | * This file is subject to the terms and conditions of the GNU General | |
10 | * Public License. See the file "COPYING" in the main directory of | |
11 | * this archive for more details. | |
12 | * | |
2d1c645c | 13 | * Copyright (C) 2005 - 2008 Tensilica, Inc. |
5a0015d6 CZ |
14 | * |
15 | * Chris Zankel <chris@zankel.net> | |
16 | * | |
17 | */ | |
18 | ||
19 | /* | |
20 | * We use a two-level table approach. The user and kernel exception vectors | |
21 | * use a first-level dispatch table to dispatch the exception to a registered | |
22 | * fast handler or the default handler, if no fast handler was registered. | |
23 | * The default handler sets up a C-stack and dispatches the exception to a | |
24 | * registerd C handler in the second-level dispatch table. | |
25 | * | |
26 | * Fast handler entry condition: | |
27 | * | |
28 | * a0: trashed, original value saved on stack (PT_AREG0) | |
29 | * a1: a1 | |
30 | * a2: new stack pointer, original value in depc | |
31 | * a3: dispatch table | |
32 | * depc: a2, original value saved on stack (PT_DEPC) | |
33 | * excsave_1: a3 | |
34 | * | |
35 | * The value for PT_DEPC saved to stack also functions as a boolean to | |
36 | * indicate that the exception is either a double or a regular exception: | |
37 | * | |
38 | * PT_DEPC >= VALID_DOUBLE_EXCEPTION_ADDRESS: double exception | |
39 | * < VALID_DOUBLE_EXCEPTION_ADDRESS: regular exception | |
40 | * | |
41 | * Note: Neither the kernel nor the user exception handler generate literals. | |
42 | * | |
43 | */ | |
44 | ||
45 | #include <linux/linkage.h> | |
46 | #include <asm/ptrace.h> | |
5a0015d6 | 47 | #include <asm/current.h> |
0013a854 | 48 | #include <asm/asm-offsets.h> |
5a0015d6 CZ |
49 | #include <asm/pgtable.h> |
50 | #include <asm/processor.h> | |
51 | #include <asm/page.h> | |
52 | #include <asm/thread_info.h> | |
e85e335f | 53 | #include <asm/vectors.h> |
5a0015d6 | 54 | |
173d6681 CZ |
55 | #define WINDOW_VECTORS_SIZE 0x180 |
56 | ||
5a0015d6 CZ |
57 | |
58 | /* | |
59 | * User exception vector. (Exceptions with PS.UM == 1, PS.EXCM == 0) | |
60 | * | |
61 | * We get here when an exception occurred while we were in userland. | |
62 | * We switch to the kernel stack and jump to the first level handler | |
63 | * associated to the exception cause. | |
64 | * | |
65 | * Note: the saved kernel stack pointer (EXC_TABLE_KSTK) is already | |
66 | * decremented by PT_USER_SIZE. | |
67 | */ | |
68 | ||
69 | .section .UserExceptionVector.text, "ax" | |
70 | ||
71 | ENTRY(_UserExceptionVector) | |
72 | ||
bc5378fc MF |
73 | xsr a3, excsave1 # save a3 and get dispatch table |
74 | wsr a2, depc # save a2 | |
5a0015d6 CZ |
75 | l32i a2, a3, EXC_TABLE_KSTK # load kernel stack to a2 |
76 | s32i a0, a2, PT_AREG0 # save a0 to ESF | |
bc5378fc | 77 | rsr a0, exccause # retrieve exception cause |
5a0015d6 CZ |
78 | s32i a0, a2, PT_DEPC # mark it as a regular exception |
79 | addx4 a0, a0, a3 # find entry in table | |
80 | l32i a0, a0, EXC_TABLE_FAST_USER # load handler | |
81 | jx a0 | |
82 | ||
d1538c46 CZ |
83 | ENDPROC(_UserExceptionVector) |
84 | ||
5a0015d6 CZ |
85 | /* |
86 | * Kernel exception vector. (Exceptions with PS.UM == 0, PS.EXCM == 0) | |
87 | * | |
88 | * We get this exception when we were already in kernel space. | |
89 | * We decrement the current stack pointer (kernel) by PT_SIZE and | |
90 | * jump to the first-level handler associated with the exception cause. | |
91 | * | |
92 | * Note: we need to preserve space for the spill region. | |
93 | */ | |
94 | ||
95 | .section .KernelExceptionVector.text, "ax" | |
96 | ||
97 | ENTRY(_KernelExceptionVector) | |
98 | ||
bc5378fc MF |
99 | xsr a3, excsave1 # save a3, and get dispatch table |
100 | wsr a2, depc # save a2 | |
5a0015d6 CZ |
101 | addi a2, a1, -16-PT_SIZE # adjust stack pointer |
102 | s32i a0, a2, PT_AREG0 # save a0 to ESF | |
bc5378fc | 103 | rsr a0, exccause # retrieve exception cause |
5a0015d6 CZ |
104 | s32i a0, a2, PT_DEPC # mark it as a regular exception |
105 | addx4 a0, a0, a3 # find entry in table | |
106 | l32i a0, a0, EXC_TABLE_FAST_KERNEL # load handler address | |
107 | jx a0 | |
108 | ||
d1538c46 | 109 | ENDPROC(_KernelExceptionVector) |
5a0015d6 CZ |
110 | |
111 | /* | |
112 | * Double exception vector (Exceptions with PS.EXCM == 1) | |
113 | * We get this exception when another exception occurs while were are | |
114 | * already in an exception, such as window overflow/underflow exception, | |
115 | * or 'expected' exceptions, for example memory exception when we were trying | |
116 | * to read data from an invalid address in user space. | |
117 | * | |
118 | * Note that this vector is never invoked for level-1 interrupts, because such | |
119 | * interrupts are disabled (masked) when PS.EXCM is set. | |
120 | * | |
121 | * We decode the exception and take the appropriate action. However, the | |
122 | * double exception vector is much more careful, because a lot more error | |
123 | * cases go through the double exception vector than through the user and | |
124 | * kernel exception vectors. | |
125 | * | |
126 | * Occasionally, the kernel expects a double exception to occur. This usually | |
127 | * happens when accessing user-space memory with the user's permissions | |
128 | * (l32e/s32e instructions). The kernel state, though, is not always suitable | |
129 | * for immediate transfer of control to handle_double, where "normal" exception | |
130 | * processing occurs. Also in kernel mode, TLB misses can occur if accessing | |
131 | * vmalloc memory, possibly requiring repair in a double exception handler. | |
132 | * | |
133 | * The variable at TABLE_FIXUP offset from the pointer in EXCSAVE_1 doubles as | |
134 | * a boolean variable and a pointer to a fixup routine. If the variable | |
135 | * EXC_TABLE_FIXUP is non-zero, this handler jumps to that address. A value of | |
136 | * zero indicates to use the default kernel/user exception handler. | |
137 | * There is only one exception, when the value is identical to the exc_table | |
138 | * label, the kernel is in trouble. This mechanism is used to protect critical | |
139 | * sections, mainly when the handler writes to the stack to assert the stack | |
140 | * pointer is valid. Once the fixup/default handler leaves that area, the | |
141 | * EXC_TABLE_FIXUP variable is reset to the fixup handler or zero. | |
142 | * | |
143 | * Procedures wishing to use this mechanism should set EXC_TABLE_FIXUP to the | |
144 | * nonzero address of a fixup routine before it could cause a double exception | |
145 | * and reset it before it returns. | |
146 | * | |
147 | * Some other things to take care of when a fast exception handler doesn't | |
148 | * specify a particular fixup handler but wants to use the default handlers: | |
149 | * | |
150 | * - The original stack pointer (in a1) must not be modified. The fast | |
151 | * exception handler should only use a2 as the stack pointer. | |
152 | * | |
153 | * - If the fast handler manipulates the stack pointer (in a2), it has to | |
154 | * register a valid fixup handler and cannot use the default handlers. | |
155 | * | |
156 | * - The handler can use any other generic register from a3 to a15, but it | |
157 | * must save the content of these registers to stack (PT_AREG3...PT_AREGx) | |
158 | * | |
159 | * - These registers must be saved before a double exception can occur. | |
160 | * | |
161 | * - If we ever implement handling signals while in double exceptions, the | |
162 | * number of registers a fast handler has saved (excluding a0 and a1) must | |
163 | * be written to PT_AREG1. (1 if only a3 is used, 2 for a3 and a4, etc. ) | |
164 | * | |
165 | * The fixup handlers are special handlers: | |
166 | * | |
167 | * - Fixup entry conditions differ from regular exceptions: | |
168 | * | |
169 | * a0: DEPC | |
170 | * a1: a1 | |
171 | * a2: trashed, original value in EXC_TABLE_DOUBLE_A2 | |
172 | * a3: exctable | |
173 | * depc: a0 | |
174 | * excsave_1: a3 | |
175 | * | |
176 | * - When the kernel enters the fixup handler, it still assumes it is in a | |
177 | * critical section, so EXC_TABLE_FIXUP variable is set to exc_table. | |
178 | * The fixup handler, therefore, has to re-register itself as the fixup | |
179 | * handler before it returns from the double exception. | |
180 | * | |
181 | * - Fixup handler can share the same exception frame with the fast handler. | |
182 | * The kernel stack pointer is not changed when entering the fixup handler. | |
183 | * | |
184 | * - Fixup handlers can jump to the default kernel and user exception | |
185 | * handlers. Before it jumps, though, it has to setup a exception frame | |
186 | * on stack. Because the default handler resets the register fixup handler | |
187 | * the fixup handler must make sure that the default handler returns to | |
188 | * it instead of the exception address, so it can re-register itself as | |
189 | * the fixup handler. | |
190 | * | |
191 | * In case of a critical condition where the kernel cannot recover, we jump | |
192 | * to unrecoverable_exception with the following entry conditions. | |
193 | * All registers a0...a15 are unchanged from the last exception, except: | |
194 | * | |
195 | * a0: last address before we jumped to the unrecoverable_exception. | |
196 | * excsave_1: a0 | |
197 | * | |
198 | * | |
199 | * See the handle_alloca_user and spill_registers routines for example clients. | |
200 | * | |
201 | * FIXME: Note: we currently don't allow signal handling coming from a double | |
202 | * exception, so the item markt with (*) is not required. | |
203 | */ | |
204 | ||
205 | .section .DoubleExceptionVector.text, "ax" | |
206 | .begin literal_prefix .DoubleExceptionVector | |
207 | ||
208 | ENTRY(_DoubleExceptionVector) | |
209 | ||
210 | /* Deliberately destroy excsave (don't assume it's value was valid). */ | |
211 | ||
bc5378fc | 212 | wsr a3, excsave1 # save a3 |
5a0015d6 CZ |
213 | |
214 | /* Check for kernel double exception (usually fatal). */ | |
215 | ||
bc5378fc | 216 | rsr a3, ps |
173d6681 | 217 | _bbci.l a3, PS_UM_BIT, .Lksp |
5a0015d6 CZ |
218 | |
219 | /* Check if we are currently handling a window exception. */ | |
220 | /* Note: We don't need to indicate that we enter a critical section. */ | |
221 | ||
bc5378fc | 222 | xsr a0, depc # get DEPC, save a0 |
5a0015d6 | 223 | |
e85e335f | 224 | movi a3, WINDOW_VECTORS_VADDR |
5a0015d6 | 225 | _bltu a0, a3, .Lfixup |
173d6681 | 226 | addi a3, a3, WINDOW_VECTORS_SIZE |
5a0015d6 CZ |
227 | _bgeu a0, a3, .Lfixup |
228 | ||
229 | /* Window overflow/underflow exception. Get stack pointer. */ | |
230 | ||
231 | mov a3, a2 | |
c0226e34 MF |
232 | /* This explicit literal and the following references to it are made |
233 | * in order to fit DoubleExceptionVector.literals into the available | |
234 | * 16-byte gap before DoubleExceptionVector.text in the absence of | |
235 | * link time relaxation. See kernel/vmlinux.lds.S | |
236 | */ | |
237 | .literal .Lexc_table, exc_table | |
238 | l32r a2, .Lexc_table | |
5a0015d6 CZ |
239 | l32i a2, a2, EXC_TABLE_KSTK |
240 | ||
241 | /* Check for overflow/underflow exception, jump if overflow. */ | |
242 | ||
243 | _bbci.l a0, 6, .Lovfl | |
244 | ||
245 | /* a0: depc, a1: a1, a2: kstk, a3: a2, depc: a0, excsave: a3 */ | |
246 | ||
247 | /* Restart window underflow exception. | |
248 | * We return to the instruction in user space that caused the window | |
249 | * underflow exception. Therefore, we change window base to the value | |
250 | * before we entered the window underflow exception and prepare the | |
251 | * registers to return as if we were coming from a regular exception | |
252 | * by changing depc (in a0). | |
253 | * Note: We can trash the current window frame (a0...a3) and depc! | |
254 | */ | |
255 | ||
bc5378fc MF |
256 | wsr a2, depc # save stack pointer temporarily |
257 | rsr a0, ps | |
173d6681 | 258 | extui a0, a0, PS_OWB_SHIFT, 4 |
bc5378fc | 259 | wsr a0, windowbase |
5a0015d6 CZ |
260 | rsync |
261 | ||
262 | /* We are now in the previous window frame. Save registers again. */ | |
263 | ||
bc5378fc | 264 | xsr a2, depc # save a2 and get stack pointer |
5a0015d6 CZ |
265 | s32i a0, a2, PT_AREG0 |
266 | ||
bc5378fc | 267 | wsr a3, excsave1 # save a3 |
c0226e34 | 268 | l32r a3, .Lexc_table |
5a0015d6 | 269 | |
bc5378fc | 270 | rsr a0, exccause |
5a0015d6 CZ |
271 | s32i a0, a2, PT_DEPC # mark it as a regular exception |
272 | addx4 a0, a0, a3 | |
273 | l32i a0, a0, EXC_TABLE_FAST_USER | |
274 | jx a0 | |
275 | ||
276 | .Lfixup:/* Check for a fixup handler or if we were in a critical section. */ | |
277 | ||
278 | /* a0: depc, a1: a1, a2: a2, a3: trashed, depc: a0, excsave1: a3 */ | |
279 | ||
c0226e34 | 280 | l32r a3, .Lexc_table |
5a0015d6 CZ |
281 | s32i a2, a3, EXC_TABLE_DOUBLE_SAVE # temporary variable |
282 | ||
283 | /* Enter critical section. */ | |
284 | ||
285 | l32i a2, a3, EXC_TABLE_FIXUP | |
286 | s32i a3, a3, EXC_TABLE_FIXUP | |
287 | beq a2, a3, .Lunrecoverable_fixup # critical! | |
288 | beqz a2, .Ldflt # no handler was registered | |
289 | ||
290 | /* a0: depc, a1: a1, a2: trash, a3: exctable, depc: a0, excsave: a3 */ | |
291 | ||
292 | jx a2 | |
293 | ||
294 | .Ldflt: /* Get stack pointer. */ | |
295 | ||
296 | l32i a3, a3, EXC_TABLE_DOUBLE_SAVE | |
297 | addi a2, a3, -PT_USER_SIZE | |
298 | ||
299 | .Lovfl: /* Jump to default handlers. */ | |
300 | ||
301 | /* a0: depc, a1: a1, a2: kstk, a3: a2, depc: a0, excsave: a3 */ | |
302 | ||
bc5378fc | 303 | xsr a3, depc |
5a0015d6 CZ |
304 | s32i a0, a2, PT_DEPC |
305 | s32i a3, a2, PT_AREG0 | |
306 | ||
307 | /* a0: avail, a1: a1, a2: kstk, a3: avail, depc: a2, excsave: a3 */ | |
308 | ||
c0226e34 | 309 | l32r a3, .Lexc_table |
bc5378fc | 310 | rsr a0, exccause |
5a0015d6 CZ |
311 | addx4 a0, a0, a3 |
312 | l32i a0, a0, EXC_TABLE_FAST_USER | |
313 | jx a0 | |
314 | ||
315 | /* | |
316 | * We only allow the ITLB miss exception if we are in kernel space. | |
317 | * All other exceptions are unexpected and thus unrecoverable! | |
318 | */ | |
319 | ||
e5083a63 | 320 | #ifdef CONFIG_MMU |
5a0015d6 CZ |
321 | .extern fast_second_level_miss_double_kernel |
322 | ||
323 | .Lksp: /* a0: a0, a1: a1, a2: a2, a3: trashed, depc: depc, excsave: a3 */ | |
324 | ||
bc5378fc | 325 | rsr a3, exccause |
173d6681 CZ |
326 | beqi a3, EXCCAUSE_ITLB_MISS, 1f |
327 | addi a3, a3, -EXCCAUSE_DTLB_MISS | |
5a0015d6 CZ |
328 | bnez a3, .Lunrecoverable |
329 | 1: movi a3, fast_second_level_miss_double_kernel | |
330 | jx a3 | |
e5083a63 JW |
331 | #else |
332 | .equ .Lksp, .Lunrecoverable | |
333 | #endif | |
5a0015d6 CZ |
334 | |
335 | /* Critical! We can't handle this situation. PANIC! */ | |
336 | ||
337 | .extern unrecoverable_exception | |
338 | ||
339 | .Lunrecoverable_fixup: | |
340 | l32i a2, a3, EXC_TABLE_DOUBLE_SAVE | |
bc5378fc | 341 | xsr a0, depc |
5a0015d6 CZ |
342 | |
343 | .Lunrecoverable: | |
bc5378fc MF |
344 | rsr a3, excsave1 |
345 | wsr a0, excsave1 | |
5a0015d6 CZ |
346 | movi a0, unrecoverable_exception |
347 | callx0 a0 | |
348 | ||
349 | .end literal_prefix | |
350 | ||
d1538c46 | 351 | ENDPROC(_DoubleExceptionVector) |
5a0015d6 CZ |
352 | |
353 | /* | |
354 | * Debug interrupt vector | |
355 | * | |
356 | * There is not much space here, so simply jump to another handler. | |
357 | * EXCSAVE[DEBUGLEVEL] has been set to that handler. | |
358 | */ | |
359 | ||
360 | .section .DebugInterruptVector.text, "ax" | |
361 | ||
362 | ENTRY(_DebugInterruptVector) | |
d1538c46 | 363 | |
bc5378fc | 364 | xsr a0, SREG_EXCSAVE + XCHAL_DEBUGLEVEL |
5a0015d6 CZ |
365 | jx a0 |
366 | ||
d1538c46 | 367 | ENDPROC(_DebugInterruptVector) |
5a0015d6 CZ |
368 | |
369 | ||
2d1c645c MG |
370 | |
371 | /* | |
372 | * Medium priority level interrupt vectors | |
373 | * | |
374 | * Each takes less than 16 (0x10) bytes, no literals, by placing | |
375 | * the extra 8 bytes that would otherwise be required in the window | |
376 | * vectors area where there is space. With relocatable vectors, | |
377 | * all vectors are within ~ 4 kB range of each other, so we can | |
378 | * simply jump (J) to another vector without having to use JX. | |
379 | * | |
380 | * common_exception code gets current IRQ level in PS.INTLEVEL | |
381 | * and preserves it for the IRQ handling time. | |
382 | */ | |
383 | ||
384 | .macro irq_entry_level level | |
385 | ||
386 | .if XCHAL_EXCM_LEVEL >= \level | |
387 | .section .Level\level\()InterruptVector.text, "ax" | |
388 | ENTRY(_Level\level\()InterruptVector) | |
389 | wsr a0, epc1 | |
390 | rsr a0, epc\level | |
391 | xsr a0, epc1 | |
392 | # branch to user or kernel vector | |
393 | j _SimulateUserKernelVectorException | |
394 | .endif | |
395 | ||
396 | .endm | |
397 | ||
398 | irq_entry_level 2 | |
399 | irq_entry_level 3 | |
400 | irq_entry_level 4 | |
401 | irq_entry_level 5 | |
402 | irq_entry_level 6 | |
403 | ||
404 | ||
5a0015d6 CZ |
405 | /* Window overflow and underflow handlers. |
406 | * The handlers must be 64 bytes apart, first starting with the underflow | |
407 | * handlers underflow-4 to underflow-12, then the overflow handlers | |
408 | * overflow-4 to overflow-12. | |
409 | * | |
410 | * Note: We rerun the underflow handlers if we hit an exception, so | |
411 | * we try to access any page that would cause a page fault early. | |
412 | */ | |
413 | ||
d1538c46 CZ |
414 | #define ENTRY_ALIGN64(name) \ |
415 | .globl name; \ | |
416 | .align 64; \ | |
417 | name: | |
418 | ||
5a0015d6 CZ |
419 | .section .WindowVectors.text, "ax" |
420 | ||
421 | ||
422 | /* 4-Register Window Overflow Vector (Handler) */ | |
423 | ||
d1538c46 CZ |
424 | ENTRY_ALIGN64(_WindowOverflow4) |
425 | ||
5a0015d6 CZ |
426 | s32e a0, a5, -16 |
427 | s32e a1, a5, -12 | |
428 | s32e a2, a5, -8 | |
429 | s32e a3, a5, -4 | |
430 | rfwo | |
431 | ||
d1538c46 CZ |
432 | ENDPROC(_WindowOverflow4) |
433 | ||
5a0015d6 | 434 | |
2d1c645c MG |
435 | #if XCHAL_EXCM_LEVEL >= 2 |
436 | /* Not a window vector - but a convenient location | |
437 | * (where we know there's space) for continuation of | |
438 | * medium priority interrupt dispatch code. | |
439 | * On entry here, a0 contains PS, and EPC2 contains saved a0: | |
440 | */ | |
441 | .align 4 | |
442 | _SimulateUserKernelVectorException: | |
443 | wsr a0, excsave2 | |
444 | movi a0, 4 # LEVEL1_INTERRUPT cause | |
445 | wsr a0, exccause | |
446 | rsr a0, ps | |
447 | bbsi.l a0, PS_UM_BIT, 1f # branch if user mode | |
448 | rsr a0, excsave2 # restore a0 | |
449 | j _KernelExceptionVector # simulate kernel vector exception | |
450 | 1: rsr a0, excsave2 # restore a0 | |
451 | j _UserExceptionVector # simulate user vector exception | |
452 | #endif | |
453 | ||
454 | ||
5a0015d6 CZ |
455 | /* 4-Register Window Underflow Vector (Handler) */ |
456 | ||
d1538c46 CZ |
457 | ENTRY_ALIGN64(_WindowUnderflow4) |
458 | ||
5a0015d6 CZ |
459 | l32e a0, a5, -16 |
460 | l32e a1, a5, -12 | |
461 | l32e a2, a5, -8 | |
462 | l32e a3, a5, -4 | |
463 | rfwu | |
464 | ||
d1538c46 | 465 | ENDPROC(_WindowUnderflow4) |
5a0015d6 CZ |
466 | |
467 | /* 8-Register Window Overflow Vector (Handler) */ | |
468 | ||
d1538c46 CZ |
469 | ENTRY_ALIGN64(_WindowOverflow8) |
470 | ||
5a0015d6 CZ |
471 | s32e a0, a9, -16 |
472 | l32e a0, a1, -12 | |
473 | s32e a2, a9, -8 | |
474 | s32e a1, a9, -12 | |
475 | s32e a3, a9, -4 | |
476 | s32e a4, a0, -32 | |
477 | s32e a5, a0, -28 | |
478 | s32e a6, a0, -24 | |
479 | s32e a7, a0, -20 | |
480 | rfwo | |
481 | ||
d1538c46 CZ |
482 | ENDPROC(_WindowOverflow8) |
483 | ||
5a0015d6 CZ |
484 | /* 8-Register Window Underflow Vector (Handler) */ |
485 | ||
d1538c46 CZ |
486 | ENTRY_ALIGN64(_WindowUnderflow8) |
487 | ||
5a0015d6 CZ |
488 | l32e a1, a9, -12 |
489 | l32e a0, a9, -16 | |
490 | l32e a7, a1, -12 | |
491 | l32e a2, a9, -8 | |
492 | l32e a4, a7, -32 | |
493 | l32e a3, a9, -4 | |
494 | l32e a5, a7, -28 | |
495 | l32e a6, a7, -24 | |
496 | l32e a7, a7, -20 | |
497 | rfwu | |
498 | ||
d1538c46 | 499 | ENDPROC(_WindowUnderflow8) |
5a0015d6 CZ |
500 | |
501 | /* 12-Register Window Overflow Vector (Handler) */ | |
502 | ||
d1538c46 CZ |
503 | ENTRY_ALIGN64(_WindowOverflow12) |
504 | ||
5a0015d6 CZ |
505 | s32e a0, a13, -16 |
506 | l32e a0, a1, -12 | |
507 | s32e a1, a13, -12 | |
508 | s32e a2, a13, -8 | |
509 | s32e a3, a13, -4 | |
510 | s32e a4, a0, -48 | |
511 | s32e a5, a0, -44 | |
512 | s32e a6, a0, -40 | |
513 | s32e a7, a0, -36 | |
514 | s32e a8, a0, -32 | |
515 | s32e a9, a0, -28 | |
516 | s32e a10, a0, -24 | |
517 | s32e a11, a0, -20 | |
518 | rfwo | |
519 | ||
d1538c46 CZ |
520 | ENDPROC(_WindowOverflow12) |
521 | ||
5a0015d6 CZ |
522 | /* 12-Register Window Underflow Vector (Handler) */ |
523 | ||
d1538c46 CZ |
524 | ENTRY_ALIGN64(_WindowUnderflow12) |
525 | ||
5a0015d6 CZ |
526 | l32e a1, a13, -12 |
527 | l32e a0, a13, -16 | |
528 | l32e a11, a1, -12 | |
529 | l32e a2, a13, -8 | |
530 | l32e a4, a11, -48 | |
531 | l32e a8, a11, -32 | |
532 | l32e a3, a13, -4 | |
533 | l32e a5, a11, -44 | |
534 | l32e a6, a11, -40 | |
535 | l32e a7, a11, -36 | |
536 | l32e a9, a11, -28 | |
537 | l32e a10, a11, -24 | |
538 | l32e a11, a11, -20 | |
539 | rfwu | |
540 | ||
d1538c46 CZ |
541 | ENDPROC(_WindowUnderflow12) |
542 | ||
5a0015d6 | 543 | .text |