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gerrit.cesnet.cz / github / trini / u-boot / 1e9a164e22976933002c5e4b0b79b09fcede9cd4 / . / cpu / leon3 / start.S
blob: 807f7e8dae7c190ddef95f13db01a59e674e656a [file] [log] [blame]
Daniel Hellstrom1e9a1642008-03-26 22:51:29 +0100[diff] [blame^]1/* This is where the SPARC/LEON3 starts
2 * Copyright (C) 2007,
3 * Daniel Hellstrom, daniel@gaisler.com
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <config.h>
25#include <asm/asmmacro.h>
26#include <asm/winmacro.h>
27#include <asm/psr.h>
28#include <asm/stack.h>
29#include <asm/leon.h>
30#include <version.h>
31
32/* Entry for traps which jump to a programmer-specified trap handler. */
33#define TRAPR(H) \
34 wr %g0, 0xfe0, %psr; \
35 mov %g0, %tbr; \
36 ba (H); \
37 mov %g0, %wim;
38
39#define TRAP(H) \
40 mov %psr, %l0; \
41 ba (H); \
42 nop; nop;
43
44#define TRAPI(ilevel) \
45 mov ilevel, %l7; \
46 mov %psr, %l0; \
47 b _irq_entry; \
48 mov %wim, %l3
49
50/* Unexcpected trap will halt the processor by forcing it to error state */
51#undef BAD_TRAP
52#define BAD_TRAP ta 0; nop; nop; nop;
53
54/* Software trap. Treat as BAD_TRAP for the time being... */
55#define SOFT_TRAP TRAP(_hwerr)
56
57#define PSR_INIT 0x1FC0 /* Disable traps, set s and ps */
58#define WIM_INIT 2
59
60/* All traps low-level code here must end with this macro. */
61#define RESTORE_ALL b ret_trap_entry; clr %l6;
62
63#define WRITE_PAUSE nop;nop;nop
64
65WINDOWSIZE = (16 * 4)
66ARGPUSHSIZE = (6 * 4)
67ARGPUSH = (WINDOWSIZE + 4)
68MINFRAME = (WINDOWSIZE + ARGPUSHSIZE + 4)
69
70/* Number of register windows */
71#ifndef CFG_SPARC_NWINDOWS
72#error Must define number of SPARC register windows, default is 8
73#endif
74
75#define STACK_ALIGN 8
76#define SA(X) (((X)+(STACK_ALIGN-1)) & ~(STACK_ALIGN-1))
77
78 .section ".start", "ax"
79 .globl _start, start, _trap_table
80 .globl _irq_entry, nmi_trap
81 .globl _reset_reloc
82
83/* at address 0
84 * Hardware traps
85 */
86start:
87_start:
88_trap_table:
89 TRAPR(_hardreset); ! 00 reset trap
90 BAD_TRAP; ! 01 instruction_access_exception
91 BAD_TRAP; ! 02 illegal_instruction
92 BAD_TRAP; ! 03 priveleged_instruction
93 BAD_TRAP; ! 04 fp_disabled
94 TRAP(_window_overflow); ! 05 window_overflow
95 TRAP(_window_underflow); ! 06 window_underflow
96 BAD_TRAP; ! 07 Memory Address Not Aligned
97 BAD_TRAP; ! 08 Floating Point Exception
98 BAD_TRAP; ! 09 Data Miss Exception
99 BAD_TRAP; ! 0a Tagged Instruction Ovrflw
100 BAD_TRAP; ! 0b Watchpoint Detected
101 BAD_TRAP; ! 0c
102 BAD_TRAP; ! 0d
103 BAD_TRAP; ! 0e
104 BAD_TRAP; ! 0f
105 BAD_TRAP; ! 10
106 TRAPI(1); ! 11 IRQ level 1
107 TRAPI(2); ! 12 IRQ level 2
108 TRAPI(3); ! 13 IRQ level 3
109 TRAPI(4); ! 14 IRQ level 4
110 TRAPI(5); ! 15 IRQ level 5
111 TRAPI(6); ! 16 IRQ level 6
112 TRAPI(7); ! 17 IRQ level 7
113 TRAPI(8); ! 18 IRQ level 8
114 TRAPI(9); ! 19 IRQ level 9
115 TRAPI(10); ! 1a IRQ level 10
116 TRAPI(11); ! 1b IRQ level 11
117 TRAPI(12); ! 1c IRQ level 12
118 TRAPI(13); ! 1d IRQ level 13
119 TRAPI(14); ! 1e IRQ level 14
120 TRAP(_nmi_trap); ! 1f IRQ level 15 /
121 ! NMI (non maskable interrupt)
122 BAD_TRAP; ! 20 r_register_access_error
123 BAD_TRAP; ! 21 instruction access error
124 BAD_TRAP; ! 22
125 BAD_TRAP; ! 23
126 BAD_TRAP; ! 24 co-processor disabled
127 BAD_TRAP; ! 25 uniplemented FLUSH
128 BAD_TRAP; ! 26
129 BAD_TRAP; ! 27
130 BAD_TRAP; ! 28 co-processor exception
131 BAD_TRAP; ! 29 data access error
132 BAD_TRAP; ! 2a division by zero
133 BAD_TRAP; ! 2b data store error
134 BAD_TRAP; ! 2c data access MMU miss
135 BAD_TRAP; ! 2d
136 BAD_TRAP; ! 2e
137 BAD_TRAP; ! 2f
138 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 30-33
139 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 34-37
140 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 38-3b
141 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 3c-3f
142 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 40-43
143 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 44-47
144 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 48-4b
145 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 4c-4f
146 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 50-53
147 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 54-57
148 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 58-5b
149 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 5c-5f
150
151 /* implementaion dependent */
152 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 60-63
153 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 64-67
154 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 68-6b
155 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 6c-6f
156 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 70-73
157 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 74-77
158 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 78-7b
159 BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 7c-7f
160
161 /* Software traps, not handled */
162 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 80-83
163 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 84-87
164 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 88-8b
165 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 8c-8f
166 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 90-93
167 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 94-97
168 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 98-9b
169 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 9c-9f
170 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! a0-a3
171 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! a4-a7
172 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! a8-ab
173 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! ac-af
174 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! b0-b3
175 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! b4-b7
176 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! b8-bb
177 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! bc-bf
178 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! c0-c3
179 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! c4-c7
180 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! c8-cb
181 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! cc-cf
182 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! d0-d3
183 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! d4-d7
184 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! d8-db
185 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! dc-df
186 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! e0-e3
187 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! e4-e7
188 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! e8-eb
189 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! ec-ef
190 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! f0-f3
191 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! f4-f7
192 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! f8-fb
193 SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! fc-ff
194/*
195 * Version string
196 */
197
198 .data
199 .extern leon3_snooping_avail
200 .globl version_string
201version_string:
202 .ascii U_BOOT_VERSION
203 .ascii " (", __DATE__, " - ", __TIME__, ")"
204 .ascii CONFIG_IDENT_STRING, "\0"
205
206 .section ".text"
207 .align 4
208
209_hardreset:
2101000:
211 flush
212
213 /* Enable I/D-Cache and Snooping */
214 set 0x0081000f, %g2
215 sta %g2, [%g0] 2
216
217 mov %g0, %y
218 clr %g1
219 clr %g2
220 clr %g3
221 clr %g4
222 clr %g5
223 clr %g6
224 clr %g7
225
226 mov %asr17, %g3
227 and %g3, 0x1f, %g3
228clear_window:
229 mov %g0, %l0
230 mov %g0, %l1
231 mov %g0, %l2
232 mov %g0, %l3
233 mov %g0, %l4
234 mov %g0, %l5
235 mov %g0, %l6
236 mov %g0, %l7
237 mov %g0, %o0
238 mov %g0, %o1
239 mov %g0, %o2
240 mov %g0, %o3
241 mov %g0, %o4
242 mov %g0, %o5
243 mov %g0, %o6
244 mov %g0, %o7
245 subcc %g3, 1, %g3
246 bge clear_window
247 save
248
249wininit:
250 set WIM_INIT, %g3
251 mov %g3, %wim
252
253stackp:
254 set CFG_INIT_SP_OFFSET, %fp
255 andn %fp, 0x0f, %fp
256 sub %fp, 64, %sp
257
258cpu_init_unreloc:
259 call cpu_init_f
260 nop
261
262/* un relocated start address of monitor */
263#define TEXT_START _text
264
265/* un relocated end address of monitor */
266#define DATA_END __init_end
267
268reloc:
269 set TEXT_START,%g2
270 set DATA_END,%g3
271 set CFG_RELOC_MONITOR_BASE,%g4
272reloc_loop:
273 ldd [%g2],%l0
274 ldd [%g2+8],%l2
275 std %l0,[%g4]
276 std %l2,[%g4+8]
277 inc 16,%g2
278 subcc %g3,%g2,%g0
279 bne reloc_loop
280 inc 16,%g4
281
282 clr %l0
283 clr %l1
284 clr %l2
285 clr %l3
286 clr %g2
287
288/* register g4 contain address to start
289 * This means that BSS must be directly after data and code segments
290 *
291 * g3 is length of bss = (__bss_end-__bss_start)
292 *
293 */
294
295clr_bss:
296/* clear bss area (the relocated) */
297 set __bss_start,%g2
298 set __bss_end,%g3
299 sub %g3,%g2,%g3
300 add %g3,%g4,%g3
301 clr %g1 /* std %g0 uses g0 and g1 */
302/* clearing 16byte a time ==> linker script need to align to 16 byte offset */
303clr_bss_16:
304 std %g0,[%g4]
305 std %g0,[%g4+8]
306 inc 16,%g4
307 cmp %g3,%g4
308 bne clr_bss_16
309 nop
310
311/* add offsets to GOT table */
312fixup_got:
313 set __got_start,%g4
314 set __got_end,%g3
315/*
316 * new got offset = (old GOT-PTR (read with ld) -
317 * CFG_RELOC_MONITOR_BASE(from define) ) +
318 * Destination Address (from define)
319 */
320 set CFG_RELOC_MONITOR_BASE,%g2
321 set TEXT_START, %g1
322 add %g4,%g2,%g4
323 sub %g4,%g1,%g4
324 add %g3,%g2,%g3
325 sub %g3,%g1,%g3
326 sub %g2,%g1,%g2 ! prepare register with (new base address) -
327 ! (old base address)
328got_loop:
329 ld [%g4],%l0 ! load old GOT-PTR
330 add %l0,%g2,%l0 ! increase with (new base address) -
331 ! (old base)
332 st %l0,[%g4]
333 inc 4,%g4
334 cmp %g3,%g4
335 bne got_loop
336 nop
337
338prom_relocate:
339 set __prom_start, %g2
340 set __prom_end, %g3
341 set CFG_PROM_OFFSET, %g4
342
343prom_relocate_loop:
344 ldd [%g2],%l0
345 ldd [%g2+8],%l2
346 std %l0,[%g4]
347 std %l2,[%g4+8]
348 inc 16,%g2
349 subcc %g3,%g2,%g0
350 bne prom_relocate_loop
351 inc 16,%g4
352
353/* Trap table has been moved, lets tell CPU about
354 * the new trap table address
355 */
356
357 set CFG_RELOC_MONITOR_BASE, %g2
358 wr %g0, %g2, %tbr
359 nop
360 nop
361 nop
362
363/* If CACHE snooping is available in hardware the
364 * variable leon3_snooping_avail will be set to
365 * 0x800000 else 0.
366 */
367snoop_detect:
368 sethi %hi(0x00800000), %o0
369 lda [%g0] 2, %o1
370 and %o0, %o1, %o0
371 sethi %hi(leon3_snooping_avail+CFG_RELOC_MONITOR_BASE-TEXT_BASE), %o1
372 st %o0, [%lo(leon3_snooping_avail+CFG_RELOC_MONITOR_BASE-TEXT_BASE)+%o1]
373
374/* call relocate*/
375 nop
376/* Call relocated init functions */
377jump:
378 set cpu_init_f2,%o1
379 set CFG_RELOC_MONITOR_BASE,%o2
380 add %o1,%o2,%o1
381 sub %o1,%g1,%o1
382 call %o1
383 clr %o0
384
385 set board_init_f,%o1
386 set CFG_RELOC_MONITOR_BASE,%o2
387 add %o1,%o2,%o1
388 sub %o1,%g1,%o1
389 call %o1
390 clr %o0
391
392dead: ta 0 ! if call returns...
393 nop
394
395/* Interrupt handler caller,
396 * reg L7: interrupt number
397 * reg L0: psr after interrupt
398 * reg L1: PC
399 * reg L2: next PC
400 * reg L3: wim
401 */
402_irq_entry:
403 SAVE_ALL
404
405 or %l0, PSR_PIL, %g2
406 wr %g2, 0x0, %psr
407 WRITE_PAUSE
408 wr %g2, PSR_ET, %psr
409 WRITE_PAUSE
410 mov %l7, %o0 ! irq level
411 set handler_irq, %o1
412 set (CFG_RELOC_MONITOR_BASE-TEXT_BASE), %o2
413 add %o1, %o2, %o1
414 call %o1
415 add %sp, SF_REGS_SZ, %o1 ! pt_regs ptr
416 or %l0, PSR_PIL, %g2 ! restore PIL after handler_irq
417 wr %g2, PSR_ET, %psr ! keep ET up
418 WRITE_PAUSE
419
420 RESTORE_ALL
421
422!Window overflow trap handler.
423 .global _window_overflow
424
425_window_overflow:
426
427 mov %wim, %l3 ! Calculate next WIM
428 mov %g1, %l7
429 srl %l3, 1, %g1
430 sll %l3, (CFG_SPARC_NWINDOWS-1) , %l4
431 or %l4, %g1, %g1
432
433 save ! Get into window to be saved.
434 mov %g1, %wim
435 nop;
436 nop;
437 nop
438 st %l0, [%sp + 0];
439 st %l1, [%sp + 4];
440 st %l2, [%sp + 8];
441 st %l3, [%sp + 12];
442 st %l4, [%sp + 16];
443 st %l5, [%sp + 20];
444 st %l6, [%sp + 24];
445 st %l7, [%sp + 28];
446 st %i0, [%sp + 32];
447 st %i1, [%sp + 36];
448 st %i2, [%sp + 40];
449 st %i3, [%sp + 44];
450 st %i4, [%sp + 48];
451 st %i5, [%sp + 52];
452 st %i6, [%sp + 56];
453 st %i7, [%sp + 60];
454 restore ! Go back to trap window.
455 mov %l7, %g1
456 jmp %l1 ! Re-execute save.
457 rett %l2
458
459/* Window underflow trap handler. */
460
461 .global _window_underflow
462
463_window_underflow:
464
465 mov %wim, %l3 ! Calculate next WIM
466 sll %l3, 1, %l4
467 srl %l3, (CFG_SPARC_NWINDOWS-1), %l5
468 or %l5, %l4, %l5
469 mov %l5, %wim
470 nop; nop; nop
471 restore ! Two restores to get into the
472 restore ! window to restore
473 ld [%sp + 0], %l0; ! Restore window from the stack
474 ld [%sp + 4], %l1;
475 ld [%sp + 8], %l2;
476 ld [%sp + 12], %l3;
477 ld [%sp + 16], %l4;
478 ld [%sp + 20], %l5;
479 ld [%sp + 24], %l6;
480 ld [%sp + 28], %l7;
481 ld [%sp + 32], %i0;
482 ld [%sp + 36], %i1;
483 ld [%sp + 40], %i2;
484 ld [%sp + 44], %i3;
485 ld [%sp + 48], %i4;
486 ld [%sp + 52], %i5;
487 ld [%sp + 56], %i6;
488 ld [%sp + 60], %i7;
489 save ! Get back to the trap window.
490 save
491 jmp %l1 ! Re-execute restore.
492 rett %l2
493
494 retl
495
496_nmi_trap:
497 nop
498 jmp %l1
499 rett %l2
500
501_hwerr:
502 ta 0
503 nop
504 nop
505 b _hwerr ! loop infinite
506 nop
507
508/* Registers to not touch at all. */
509#define t_psr l0 /* Set by caller */
510#define t_pc l1 /* Set by caller */
511#define t_npc l2 /* Set by caller */
512#define t_wim l3 /* Set by caller */
513#define t_twinmask l4 /* Set at beginning of this entry routine. */
514#define t_kstack l5 /* Set right before pt_regs frame is built */
515#define t_retpc l6 /* If you change this, change winmacro.h header file */
516#define t_systable l7 /* Never touch this, could be the syscall table ptr. */
517#define curptr g6 /* Set after pt_regs frame is built */
518
519trap_setup:
520/* build a pt_regs trap frame. */
521 sub %fp, (SF_REGS_SZ + PT_REGS_SZ), %t_kstack
522 PT_STORE_ALL(t_kstack, t_psr, t_pc, t_npc, g2)
523
524 /* See if we are in the trap window. */
525 mov 1, %t_twinmask
526 sll %t_twinmask, %t_psr, %t_twinmask ! t_twinmask = (1 << psr)
527 andcc %t_twinmask, %t_wim, %g0
528 beq 1f ! in trap window, clean up
529 nop
530
531 /*-------------------------------------------------
532 * Spill , adjust %wim and go.
533 */
534 srl %t_wim, 0x1, %g2 ! begin computation of new %wim
535
536 set (CFG_SPARC_NWINDOWS-1), %g3 !NWINDOWS-1
537
538 sll %t_wim, %g3, %t_wim ! NWINDOWS-1
539 or %t_wim, %g2, %g2
540 and %g2, 0xff, %g2
541
542 save %g0, %g0, %g0 ! get in window to be saved
543
544 /* Set new %wim value */
545 wr %g2, 0x0, %wim
546
547 /* Save the kernel window onto the corresponding stack. */
548 RW_STORE(sp)
549
550 restore %g0, %g0, %g0
551 /*-------------------------------------------------*/
552
5531:
554 /* Trap from kernel with a window available.
555 * Just do it...
556 */
557 jmpl %t_retpc + 0x8, %g0 ! return to caller
558 mov %t_kstack, %sp ! jump onto new stack
559
560#define twin_tmp1 l4
561#define glob_tmp g4
562#define curptr g6
563ret_trap_entry:
564 wr %t_psr, 0x0, %psr ! enable nesting again, clear ET
565
566 /* Will the rett land us in the invalid window? */
567 mov 2, %g1
568 sll %g1, %t_psr, %g1
569
570 set CFG_SPARC_NWINDOWS, %g2 !NWINDOWS
571
572 srl %g1, %g2, %g2
573 or %g1, %g2, %g1
574 rd %wim, %g2
575 andcc %g2, %g1, %g0
576 be 1f ! Nope, just return from the trap
577 sll %g2, 0x1, %g1
578
579 /* We have to grab a window before returning. */
580 set (CFG_SPARC_NWINDOWS-1), %g3 !NWINDOWS-1
581
582 srl %g2, %g3, %g2
583 or %g1, %g2, %g1
584 and %g1, 0xff, %g1
585
586 wr %g1, 0x0, %wim
587
588 /* Grrr, make sure we load from the right %sp... */
589 PT_LOAD_ALL(sp, t_psr, t_pc, t_npc, g1)
590
591 restore %g0, %g0, %g0
592 RW_LOAD(sp)
593 b 2f
594 save %g0, %g0, %g0
595
596 /* Reload the entire frame in case this is from a
597 * kernel system call or whatever...
598 */
5991:
600 PT_LOAD_ALL(sp, t_psr, t_pc, t_npc, g1)
6012:
602 wr %t_psr, 0x0, %psr
603 nop;
604 nop;
605 nop
606
607 jmp %t_pc
608 rett %t_npc
609
610/* This is called from relocated C-code.
611 * It resets the system by jumping to _start
612 */
613_reset_reloc:
614 set start, %l0
615 call %l0
616 nop