Commit | Line | Data |
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9994a338 PM |
1 | /* |
2 | * This file contains miscellaneous low-level functions. | |
3 | * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) | |
4 | * | |
5 | * Largely rewritten by Cort Dougan (cort@cs.nmt.edu) | |
6 | * and Paul Mackerras. | |
7 | * | |
3d1229d6 ME |
8 | * kexec bits: |
9 | * Copyright (C) 2002-2003 Eric Biederman <ebiederm@xmission.com> | |
10 | * GameCube/ppc32 port Copyright (C) 2004 Albert Herranz | |
674bfa48 SP |
11 | * PPC44x port. Copyright (C) 2011, IBM Corporation |
12 | * Author: Suzuki Poulose <suzuki@in.ibm.com> | |
3d1229d6 | 13 | * |
9994a338 PM |
14 | * This program is free software; you can redistribute it and/or |
15 | * modify it under the terms of the GNU General Public License | |
16 | * as published by the Free Software Foundation; either version | |
17 | * 2 of the License, or (at your option) any later version. | |
18 | * | |
19 | */ | |
20 | ||
9994a338 PM |
21 | #include <linux/sys.h> |
22 | #include <asm/unistd.h> | |
23 | #include <asm/errno.h> | |
24 | #include <asm/reg.h> | |
25 | #include <asm/page.h> | |
26 | #include <asm/cache.h> | |
27 | #include <asm/cputable.h> | |
28 | #include <asm/mmu.h> | |
29 | #include <asm/ppc_asm.h> | |
30 | #include <asm/thread_info.h> | |
31 | #include <asm/asm-offsets.h> | |
3d1229d6 ME |
32 | #include <asm/processor.h> |
33 | #include <asm/kexec.h> | |
f048aace | 34 | #include <asm/bug.h> |
46f52210 | 35 | #include <asm/ptrace.h> |
9994a338 PM |
36 | |
37 | .text | |
38 | ||
cbc9565e BH |
39 | /* |
40 | * We store the saved ksp_limit in the unused part | |
41 | * of the STACK_FRAME_OVERHEAD | |
42 | */ | |
85218827 KG |
43 | _GLOBAL(call_do_softirq) |
44 | mflr r0 | |
45 | stw r0,4(r1) | |
cbc9565e BH |
46 | lwz r10,THREAD+KSP_LIMIT(r2) |
47 | addi r11,r3,THREAD_INFO_GAP | |
85218827 KG |
48 | stwu r1,THREAD_SIZE-STACK_FRAME_OVERHEAD(r3) |
49 | mr r1,r3 | |
cbc9565e BH |
50 | stw r10,8(r1) |
51 | stw r11,THREAD+KSP_LIMIT(r2) | |
85218827 | 52 | bl __do_softirq |
cbc9565e | 53 | lwz r10,8(r1) |
85218827 KG |
54 | lwz r1,0(r1) |
55 | lwz r0,4(r1) | |
cbc9565e | 56 | stw r10,THREAD+KSP_LIMIT(r2) |
85218827 KG |
57 | mtlr r0 |
58 | blr | |
59 | ||
1a18a664 KH |
60 | /* |
61 | * void call_do_irq(struct pt_regs *regs, struct thread_info *irqtp); | |
62 | */ | |
0366a1c7 | 63 | _GLOBAL(call_do_irq) |
85218827 KG |
64 | mflr r0 |
65 | stw r0,4(r1) | |
cbc9565e | 66 | lwz r10,THREAD+KSP_LIMIT(r2) |
1a18a664 | 67 | addi r11,r4,THREAD_INFO_GAP |
0366a1c7 BH |
68 | stwu r1,THREAD_SIZE-STACK_FRAME_OVERHEAD(r4) |
69 | mr r1,r4 | |
cbc9565e BH |
70 | stw r10,8(r1) |
71 | stw r11,THREAD+KSP_LIMIT(r2) | |
0366a1c7 | 72 | bl __do_irq |
cbc9565e | 73 | lwz r10,8(r1) |
85218827 KG |
74 | lwz r1,0(r1) |
75 | lwz r0,4(r1) | |
cbc9565e | 76 | stw r10,THREAD+KSP_LIMIT(r2) |
85218827 KG |
77 | mtlr r0 |
78 | blr | |
85218827 | 79 | |
f2783c15 PM |
80 | /* |
81 | * This returns the high 64 bits of the product of two 64-bit numbers. | |
82 | */ | |
83 | _GLOBAL(mulhdu) | |
84 | cmpwi r6,0 | |
85 | cmpwi cr1,r3,0 | |
86 | mr r10,r4 | |
87 | mulhwu r4,r4,r5 | |
88 | beq 1f | |
89 | mulhwu r0,r10,r6 | |
90 | mullw r7,r10,r5 | |
91 | addc r7,r0,r7 | |
92 | addze r4,r4 | |
93 | 1: beqlr cr1 /* all done if high part of A is 0 */ | |
f2783c15 | 94 | mullw r9,r3,r5 |
737b01fc | 95 | mulhwu r10,r3,r5 |
f2783c15 | 96 | beq 2f |
737b01fc CL |
97 | mullw r0,r3,r6 |
98 | mulhwu r8,r3,r6 | |
f2783c15 PM |
99 | addc r7,r0,r7 |
100 | adde r4,r4,r8 | |
737b01fc | 101 | addze r10,r10 |
f2783c15 | 102 | 2: addc r4,r4,r9 |
737b01fc | 103 | addze r3,r10 |
f2783c15 PM |
104 | blr |
105 | ||
9994a338 PM |
106 | /* |
107 | * sub_reloc_offset(x) returns x - reloc_offset(). | |
108 | */ | |
109 | _GLOBAL(sub_reloc_offset) | |
110 | mflr r0 | |
111 | bl 1f | |
112 | 1: mflr r5 | |
113 | lis r4,1b@ha | |
114 | addi r4,r4,1b@l | |
115 | subf r5,r4,r5 | |
116 | subf r3,r5,r3 | |
117 | mtlr r0 | |
118 | blr | |
119 | ||
120 | /* | |
121 | * reloc_got2 runs through the .got2 section adding an offset | |
122 | * to each entry. | |
123 | */ | |
124 | _GLOBAL(reloc_got2) | |
125 | mflr r11 | |
126 | lis r7,__got2_start@ha | |
127 | addi r7,r7,__got2_start@l | |
128 | lis r8,__got2_end@ha | |
129 | addi r8,r8,__got2_end@l | |
130 | subf r8,r7,r8 | |
131 | srwi. r8,r8,2 | |
132 | beqlr | |
133 | mtctr r8 | |
134 | bl 1f | |
135 | 1: mflr r0 | |
136 | lis r4,1b@ha | |
137 | addi r4,r4,1b@l | |
138 | subf r0,r4,r0 | |
139 | add r7,r0,r7 | |
140 | 2: lwz r0,0(r7) | |
141 | add r0,r0,r3 | |
142 | stw r0,0(r7) | |
143 | addi r7,r7,4 | |
144 | bdnz 2b | |
145 | mtlr r11 | |
146 | blr | |
147 | ||
9994a338 PM |
148 | /* |
149 | * call_setup_cpu - call the setup_cpu function for this cpu | |
150 | * r3 = data offset, r24 = cpu number | |
151 | * | |
152 | * Setup function is called with: | |
153 | * r3 = data offset | |
154 | * r4 = ptr to CPU spec (relocated) | |
155 | */ | |
156 | _GLOBAL(call_setup_cpu) | |
157 | addis r4,r3,cur_cpu_spec@ha | |
158 | addi r4,r4,cur_cpu_spec@l | |
159 | lwz r4,0(r4) | |
160 | add r4,r4,r3 | |
161 | lwz r5,CPU_SPEC_SETUP(r4) | |
b26f100d | 162 | cmpwi 0,r5,0 |
9994a338 PM |
163 | add r5,r5,r3 |
164 | beqlr | |
165 | mtctr r5 | |
166 | bctr | |
167 | ||
168 | #if defined(CONFIG_CPU_FREQ_PMAC) && defined(CONFIG_6xx) | |
169 | ||
170 | /* This gets called by via-pmu.c to switch the PLL selection | |
171 | * on 750fx CPU. This function should really be moved to some | |
172 | * other place (as most of the cpufreq code in via-pmu | |
173 | */ | |
174 | _GLOBAL(low_choose_750fx_pll) | |
175 | /* Clear MSR:EE */ | |
176 | mfmsr r7 | |
177 | rlwinm r0,r7,0,17,15 | |
178 | mtmsr r0 | |
179 | ||
180 | /* If switching to PLL1, disable HID0:BTIC */ | |
181 | cmplwi cr0,r3,0 | |
182 | beq 1f | |
183 | mfspr r5,SPRN_HID0 | |
184 | rlwinm r5,r5,0,27,25 | |
185 | sync | |
186 | mtspr SPRN_HID0,r5 | |
187 | isync | |
188 | sync | |
189 | ||
190 | 1: | |
191 | /* Calc new HID1 value */ | |
192 | mfspr r4,SPRN_HID1 /* Build a HID1:PS bit from parameter */ | |
193 | rlwinm r5,r3,16,15,15 /* Clear out HID1:PS from value read */ | |
194 | rlwinm r4,r4,0,16,14 /* Could have I used rlwimi here ? */ | |
195 | or r4,r4,r5 | |
196 | mtspr SPRN_HID1,r4 | |
197 | ||
198 | /* Store new HID1 image */ | |
9778b696 | 199 | CURRENT_THREAD_INFO(r6, r1) |
9994a338 PM |
200 | lwz r6,TI_CPU(r6) |
201 | slwi r6,r6,2 | |
202 | addis r6,r6,nap_save_hid1@ha | |
203 | stw r4,nap_save_hid1@l(r6) | |
204 | ||
205 | /* If switching to PLL0, enable HID0:BTIC */ | |
206 | cmplwi cr0,r3,0 | |
207 | bne 1f | |
208 | mfspr r5,SPRN_HID0 | |
209 | ori r5,r5,HID0_BTIC | |
210 | sync | |
211 | mtspr SPRN_HID0,r5 | |
212 | isync | |
213 | sync | |
214 | ||
215 | 1: | |
216 | /* Return */ | |
217 | mtmsr r7 | |
218 | blr | |
219 | ||
220 | _GLOBAL(low_choose_7447a_dfs) | |
221 | /* Clear MSR:EE */ | |
222 | mfmsr r7 | |
223 | rlwinm r0,r7,0,17,15 | |
224 | mtmsr r0 | |
225 | ||
226 | /* Calc new HID1 value */ | |
227 | mfspr r4,SPRN_HID1 | |
228 | insrwi r4,r3,1,9 /* insert parameter into bit 9 */ | |
229 | sync | |
230 | mtspr SPRN_HID1,r4 | |
231 | sync | |
232 | isync | |
233 | ||
234 | /* Return */ | |
235 | mtmsr r7 | |
236 | blr | |
237 | ||
238 | #endif /* CONFIG_CPU_FREQ_PMAC && CONFIG_6xx */ | |
239 | ||
240 | /* | |
241 | * complement mask on the msr then "or" some values on. | |
242 | * _nmask_and_or_msr(nmask, value_to_or) | |
243 | */ | |
244 | _GLOBAL(_nmask_and_or_msr) | |
245 | mfmsr r0 /* Get current msr */ | |
246 | andc r0,r0,r3 /* And off the bits set in r3 (first parm) */ | |
247 | or r0,r0,r4 /* Or on the bits in r4 (second parm) */ | |
248 | SYNC /* Some chip revs have problems here... */ | |
249 | mtmsr r0 /* Update machine state */ | |
250 | isync | |
251 | blr /* Done */ | |
252 | ||
9dae8afd BH |
253 | #ifdef CONFIG_40x |
254 | ||
255 | /* | |
256 | * Do an IO access in real mode | |
257 | */ | |
258 | _GLOBAL(real_readb) | |
259 | mfmsr r7 | |
260 | ori r0,r7,MSR_DR | |
261 | xori r0,r0,MSR_DR | |
262 | sync | |
263 | mtmsr r0 | |
264 | sync | |
265 | isync | |
266 | lbz r3,0(r3) | |
267 | sync | |
268 | mtmsr r7 | |
269 | sync | |
270 | isync | |
271 | blr | |
272 | ||
273 | /* | |
274 | * Do an IO access in real mode | |
275 | */ | |
276 | _GLOBAL(real_writeb) | |
277 | mfmsr r7 | |
278 | ori r0,r7,MSR_DR | |
279 | xori r0,r0,MSR_DR | |
280 | sync | |
281 | mtmsr r0 | |
282 | sync | |
283 | isync | |
284 | stb r3,0(r4) | |
285 | sync | |
286 | mtmsr r7 | |
287 | sync | |
288 | isync | |
289 | blr | |
290 | ||
291 | #endif /* CONFIG_40x */ | |
9994a338 | 292 | |
0ba3418b | 293 | |
9994a338 PM |
294 | /* |
295 | * Flush instruction cache. | |
296 | * This is a no-op on the 601. | |
297 | */ | |
766d45cb | 298 | #ifndef CONFIG_PPC_8xx |
9994a338 | 299 | _GLOBAL(flush_instruction_cache) |
766d45cb | 300 | #if defined(CONFIG_4xx) |
9994a338 PM |
301 | #ifdef CONFIG_403GCX |
302 | li r3, 512 | |
303 | mtctr r3 | |
304 | lis r4, KERNELBASE@h | |
305 | 1: iccci 0, r4 | |
306 | addi r4, r4, 16 | |
307 | bdnz 1b | |
308 | #else | |
309 | lis r3, KERNELBASE@h | |
310 | iccci 0,r3 | |
311 | #endif | |
312 | #elif CONFIG_FSL_BOOKE | |
313 | BEGIN_FTR_SECTION | |
314 | mfspr r3,SPRN_L1CSR0 | |
315 | ori r3,r3,L1CSR0_CFI|L1CSR0_CLFC | |
316 | /* msync; isync recommended here */ | |
317 | mtspr SPRN_L1CSR0,r3 | |
318 | isync | |
319 | blr | |
4508dc21 | 320 | END_FTR_SECTION_IFSET(CPU_FTR_UNIFIED_ID_CACHE) |
9994a338 PM |
321 | mfspr r3,SPRN_L1CSR1 |
322 | ori r3,r3,L1CSR1_ICFI|L1CSR1_ICLFR | |
323 | mtspr SPRN_L1CSR1,r3 | |
324 | #else | |
325 | mfspr r3,SPRN_PVR | |
326 | rlwinm r3,r3,16,16,31 | |
327 | cmpwi 0,r3,1 | |
328 | beqlr /* for 601, do nothing */ | |
329 | /* 603/604 processor - use invalidate-all bit in HID0 */ | |
330 | mfspr r3,SPRN_HID0 | |
331 | ori r3,r3,HID0_ICFI | |
332 | mtspr SPRN_HID0,r3 | |
766d45cb | 333 | #endif /* CONFIG_4xx */ |
9994a338 PM |
334 | isync |
335 | blr | |
766d45cb | 336 | #endif /* CONFIG_PPC_8xx */ |
9994a338 PM |
337 | |
338 | /* | |
339 | * Write any modified data cache blocks out to memory | |
340 | * and invalidate the corresponding instruction cache blocks. | |
341 | * This is a no-op on the 601. | |
342 | * | |
343 | * flush_icache_range(unsigned long start, unsigned long stop) | |
344 | */ | |
3b04c300 | 345 | _KPROBE(flush_icache_range) |
9994a338 | 346 | BEGIN_FTR_SECTION |
0ce63670 | 347 | PURGE_PREFETCHED_INS |
9994a338 | 348 | blr /* for 601, do nothing */ |
4508dc21 | 349 | END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE) |
716fa91d | 350 | rlwinm r3,r3,0,0,31 - L1_CACHE_SHIFT |
9994a338 | 351 | subf r4,r3,r4 |
716fa91d | 352 | addi r4,r4,L1_CACHE_BYTES - 1 |
7dffb720 | 353 | srwi. r4,r4,L1_CACHE_SHIFT |
9994a338 PM |
354 | beqlr |
355 | mtctr r4 | |
356 | mr r6,r3 | |
357 | 1: dcbst 0,r3 | |
7dffb720 | 358 | addi r3,r3,L1_CACHE_BYTES |
9994a338 PM |
359 | bdnz 1b |
360 | sync /* wait for dcbst's to get to ram */ | |
14d75752 | 361 | #ifndef CONFIG_44x |
9994a338 PM |
362 | mtctr r4 |
363 | 2: icbi 0,r6 | |
7dffb720 | 364 | addi r6,r6,L1_CACHE_BYTES |
9994a338 | 365 | bdnz 2b |
14d75752 JB |
366 | #else |
367 | /* Flash invalidate on 44x because we are passed kmapped addresses and | |
368 | this doesn't work for userspace pages due to the virtually tagged | |
369 | icache. Sigh. */ | |
370 | iccci 0, r0 | |
371 | #endif | |
9994a338 PM |
372 | sync /* additional sync needed on g4 */ |
373 | isync | |
374 | blr | |
9994a338 PM |
375 | /* |
376 | * Flush a particular page from the data cache to RAM. | |
377 | * Note: this is necessary because the instruction cache does *not* | |
378 | * snoop from the data cache. | |
379 | * This is a no-op on the 601 which has a unified cache. | |
380 | * | |
381 | * void __flush_dcache_icache(void *page) | |
382 | */ | |
383 | _GLOBAL(__flush_dcache_icache) | |
384 | BEGIN_FTR_SECTION | |
0ce63670 | 385 | PURGE_PREFETCHED_INS |
4508dc21 DG |
386 | blr |
387 | END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE) | |
ca9153a3 IY |
388 | rlwinm r3,r3,0,0,31-PAGE_SHIFT /* Get page base address */ |
389 | li r4,PAGE_SIZE/L1_CACHE_BYTES /* Number of lines in a page */ | |
9994a338 PM |
390 | mtctr r4 |
391 | mr r6,r3 | |
392 | 0: dcbst 0,r3 /* Write line to ram */ | |
7dffb720 | 393 | addi r3,r3,L1_CACHE_BYTES |
9994a338 PM |
394 | bdnz 0b |
395 | sync | |
e7f75ad0 | 396 | #ifdef CONFIG_44x |
b98ac05d BH |
397 | /* We don't flush the icache on 44x. Those have a virtual icache |
398 | * and we don't have access to the virtual address here (it's | |
399 | * not the page vaddr but where it's mapped in user space). The | |
400 | * flushing of the icache on these is handled elsewhere, when | |
401 | * a change in the address space occurs, before returning to | |
402 | * user space | |
403 | */ | |
e7f75ad0 DK |
404 | BEGIN_MMU_FTR_SECTION |
405 | blr | |
406 | END_MMU_FTR_SECTION_IFSET(MMU_FTR_TYPE_44x) | |
407 | #endif /* CONFIG_44x */ | |
9994a338 PM |
408 | mtctr r4 |
409 | 1: icbi 0,r6 | |
7dffb720 | 410 | addi r6,r6,L1_CACHE_BYTES |
9994a338 PM |
411 | bdnz 1b |
412 | sync | |
413 | isync | |
414 | blr | |
415 | ||
e7f75ad0 | 416 | #ifndef CONFIG_BOOKE |
9994a338 PM |
417 | /* |
418 | * Flush a particular page from the data cache to RAM, identified | |
419 | * by its physical address. We turn off the MMU so we can just use | |
420 | * the physical address (this may be a highmem page without a kernel | |
421 | * mapping). | |
422 | * | |
423 | * void __flush_dcache_icache_phys(unsigned long physaddr) | |
424 | */ | |
425 | _GLOBAL(__flush_dcache_icache_phys) | |
426 | BEGIN_FTR_SECTION | |
0ce63670 | 427 | PURGE_PREFETCHED_INS |
9994a338 | 428 | blr /* for 601, do nothing */ |
4508dc21 | 429 | END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE) |
9994a338 PM |
430 | mfmsr r10 |
431 | rlwinm r0,r10,0,28,26 /* clear DR */ | |
432 | mtmsr r0 | |
433 | isync | |
ca9153a3 IY |
434 | rlwinm r3,r3,0,0,31-PAGE_SHIFT /* Get page base address */ |
435 | li r4,PAGE_SIZE/L1_CACHE_BYTES /* Number of lines in a page */ | |
9994a338 PM |
436 | mtctr r4 |
437 | mr r6,r3 | |
438 | 0: dcbst 0,r3 /* Write line to ram */ | |
7dffb720 | 439 | addi r3,r3,L1_CACHE_BYTES |
9994a338 PM |
440 | bdnz 0b |
441 | sync | |
442 | mtctr r4 | |
443 | 1: icbi 0,r6 | |
7dffb720 | 444 | addi r6,r6,L1_CACHE_BYTES |
9994a338 PM |
445 | bdnz 1b |
446 | sync | |
447 | mtmsr r10 /* restore DR */ | |
448 | isync | |
449 | blr | |
e7f75ad0 | 450 | #endif /* CONFIG_BOOKE */ |
9994a338 | 451 | |
9994a338 PM |
452 | /* |
453 | * Copy a whole page. We use the dcbz instruction on the destination | |
454 | * to reduce memory traffic (it eliminates the unnecessary reads of | |
455 | * the destination into cache). This requires that the destination | |
456 | * is cacheable. | |
457 | */ | |
458 | #define COPY_16_BYTES \ | |
459 | lwz r6,4(r4); \ | |
460 | lwz r7,8(r4); \ | |
461 | lwz r8,12(r4); \ | |
462 | lwzu r9,16(r4); \ | |
463 | stw r6,4(r3); \ | |
464 | stw r7,8(r3); \ | |
465 | stw r8,12(r3); \ | |
466 | stwu r9,16(r3) | |
467 | ||
468 | _GLOBAL(copy_page) | |
469 | addi r3,r3,-4 | |
470 | addi r4,r4,-4 | |
471 | ||
9994a338 PM |
472 | li r5,4 |
473 | ||
474 | #if MAX_COPY_PREFETCH > 1 | |
475 | li r0,MAX_COPY_PREFETCH | |
476 | li r11,4 | |
477 | mtctr r0 | |
478 | 11: dcbt r11,r4 | |
7dffb720 | 479 | addi r11,r11,L1_CACHE_BYTES |
9994a338 PM |
480 | bdnz 11b |
481 | #else /* MAX_COPY_PREFETCH == 1 */ | |
482 | dcbt r5,r4 | |
7dffb720 | 483 | li r11,L1_CACHE_BYTES+4 |
9994a338 | 484 | #endif /* MAX_COPY_PREFETCH */ |
ca9153a3 | 485 | li r0,PAGE_SIZE/L1_CACHE_BYTES - MAX_COPY_PREFETCH |
9994a338 PM |
486 | crclr 4*cr0+eq |
487 | 2: | |
488 | mtctr r0 | |
489 | 1: | |
490 | dcbt r11,r4 | |
491 | dcbz r5,r3 | |
492 | COPY_16_BYTES | |
7dffb720 | 493 | #if L1_CACHE_BYTES >= 32 |
9994a338 | 494 | COPY_16_BYTES |
7dffb720 | 495 | #if L1_CACHE_BYTES >= 64 |
9994a338 PM |
496 | COPY_16_BYTES |
497 | COPY_16_BYTES | |
7dffb720 | 498 | #if L1_CACHE_BYTES >= 128 |
9994a338 PM |
499 | COPY_16_BYTES |
500 | COPY_16_BYTES | |
501 | COPY_16_BYTES | |
502 | COPY_16_BYTES | |
503 | #endif | |
504 | #endif | |
505 | #endif | |
506 | bdnz 1b | |
507 | beqlr | |
508 | crnot 4*cr0+eq,4*cr0+eq | |
509 | li r0,MAX_COPY_PREFETCH | |
510 | li r11,4 | |
511 | b 2b | |
9994a338 | 512 | |
9994a338 PM |
513 | /* |
514 | * Extended precision shifts. | |
515 | * | |
516 | * Updated to be valid for shift counts from 0 to 63 inclusive. | |
517 | * -- Gabriel | |
518 | * | |
519 | * R3/R4 has 64 bit value | |
520 | * R5 has shift count | |
521 | * result in R3/R4 | |
522 | * | |
523 | * ashrdi3: arithmetic right shift (sign propagation) | |
524 | * lshrdi3: logical right shift | |
525 | * ashldi3: left shift | |
526 | */ | |
527 | _GLOBAL(__ashrdi3) | |
528 | subfic r6,r5,32 | |
529 | srw r4,r4,r5 # LSW = count > 31 ? 0 : LSW >> count | |
530 | addi r7,r5,32 # could be xori, or addi with -32 | |
531 | slw r6,r3,r6 # t1 = count > 31 ? 0 : MSW << (32-count) | |
532 | rlwinm r8,r7,0,32 # t3 = (count < 32) ? 32 : 0 | |
533 | sraw r7,r3,r7 # t2 = MSW >> (count-32) | |
534 | or r4,r4,r6 # LSW |= t1 | |
535 | slw r7,r7,r8 # t2 = (count < 32) ? 0 : t2 | |
536 | sraw r3,r3,r5 # MSW = MSW >> count | |
537 | or r4,r4,r7 # LSW |= t2 | |
538 | blr | |
539 | ||
540 | _GLOBAL(__ashldi3) | |
541 | subfic r6,r5,32 | |
542 | slw r3,r3,r5 # MSW = count > 31 ? 0 : MSW << count | |
543 | addi r7,r5,32 # could be xori, or addi with -32 | |
544 | srw r6,r4,r6 # t1 = count > 31 ? 0 : LSW >> (32-count) | |
545 | slw r7,r4,r7 # t2 = count < 32 ? 0 : LSW << (count-32) | |
546 | or r3,r3,r6 # MSW |= t1 | |
547 | slw r4,r4,r5 # LSW = LSW << count | |
548 | or r3,r3,r7 # MSW |= t2 | |
549 | blr | |
550 | ||
551 | _GLOBAL(__lshrdi3) | |
552 | subfic r6,r5,32 | |
553 | srw r4,r4,r5 # LSW = count > 31 ? 0 : LSW >> count | |
554 | addi r7,r5,32 # could be xori, or addi with -32 | |
555 | slw r6,r3,r6 # t1 = count > 31 ? 0 : MSW << (32-count) | |
556 | srw r7,r3,r7 # t2 = count < 32 ? 0 : MSW >> (count-32) | |
557 | or r4,r4,r6 # LSW |= t1 | |
558 | srw r3,r3,r5 # MSW = MSW >> count | |
559 | or r4,r4,r7 # LSW |= t2 | |
560 | blr | |
561 | ||
41b93b23 BB |
562 | /* |
563 | * 64-bit comparison: __cmpdi2(s64 a, s64 b) | |
564 | * Returns 0 if a < b, 1 if a == b, 2 if a > b. | |
565 | */ | |
566 | _GLOBAL(__cmpdi2) | |
567 | cmpw r3,r5 | |
568 | li r3,1 | |
569 | bne 1f | |
570 | cmplw r4,r6 | |
571 | beqlr | |
572 | 1: li r3,0 | |
573 | bltlr | |
574 | li r3,2 | |
575 | blr | |
95ff54f5 PM |
576 | /* |
577 | * 64-bit comparison: __ucmpdi2(u64 a, u64 b) | |
578 | * Returns 0 if a < b, 1 if a == b, 2 if a > b. | |
579 | */ | |
580 | _GLOBAL(__ucmpdi2) | |
581 | cmplw r3,r5 | |
582 | li r3,1 | |
583 | bne 1f | |
584 | cmplw r4,r6 | |
585 | beqlr | |
586 | 1: li r3,0 | |
587 | bltlr | |
588 | li r3,2 | |
589 | blr | |
590 | ||
ca9d7aea DW |
591 | _GLOBAL(__bswapdi2) |
592 | rotlwi r9,r4,8 | |
593 | rotlwi r10,r3,8 | |
594 | rlwimi r9,r4,24,0,7 | |
595 | rlwimi r10,r3,24,0,7 | |
596 | rlwimi r9,r4,24,16,23 | |
597 | rlwimi r10,r3,24,16,23 | |
598 | mr r3,r9 | |
599 | mr r4,r10 | |
600 | blr | |
601 | ||
9994a338 PM |
602 | _GLOBAL(abs) |
603 | srawi r4,r3,31 | |
604 | xor r3,r3,r4 | |
605 | sub r3,r3,r4 | |
606 | blr | |
607 | ||
69e3cea8 BH |
608 | #ifdef CONFIG_SMP |
609 | _GLOBAL(start_secondary_resume) | |
610 | /* Reset stack */ | |
9778b696 | 611 | CURRENT_THREAD_INFO(r1, r1) |
69e3cea8 BH |
612 | addi r1,r1,THREAD_SIZE-STACK_FRAME_OVERHEAD |
613 | li r3,0 | |
6de06f31 | 614 | stw r3,0(r1) /* Zero the stack frame pointer */ |
69e3cea8 BH |
615 | bl start_secondary |
616 | b . | |
617 | #endif /* CONFIG_SMP */ | |
618 | ||
9994a338 PM |
619 | /* |
620 | * This routine is just here to keep GCC happy - sigh... | |
621 | */ | |
622 | _GLOBAL(__main) | |
623 | blr | |
3d1229d6 ME |
624 | |
625 | #ifdef CONFIG_KEXEC | |
626 | /* | |
627 | * Must be relocatable PIC code callable as a C function. | |
628 | */ | |
629 | .globl relocate_new_kernel | |
630 | relocate_new_kernel: | |
631 | /* r3 = page_list */ | |
632 | /* r4 = reboot_code_buffer */ | |
633 | /* r5 = start_address */ | |
634 | ||
b3df895a SAS |
635 | #ifdef CONFIG_FSL_BOOKE |
636 | ||
637 | mr r29, r3 | |
638 | mr r30, r4 | |
639 | mr r31, r5 | |
640 | ||
641 | #define ENTRY_MAPPING_KEXEC_SETUP | |
642 | #include "fsl_booke_entry_mapping.S" | |
643 | #undef ENTRY_MAPPING_KEXEC_SETUP | |
644 | ||
645 | mr r3, r29 | |
646 | mr r4, r30 | |
647 | mr r5, r31 | |
648 | ||
674bfa48 | 649 | li r0, 0 |
68343020 | 650 | #elif defined(CONFIG_44x) |
674bfa48 | 651 | |
68343020 SP |
652 | /* Save our parameters */ |
653 | mr r29, r3 | |
654 | mr r30, r4 | |
655 | mr r31, r5 | |
656 | ||
657 | #ifdef CONFIG_PPC_47x | |
658 | /* Check for 47x cores */ | |
659 | mfspr r3,SPRN_PVR | |
660 | srwi r3,r3,16 | |
4450022b AP |
661 | cmplwi cr0,r3,PVR_476FPE@h |
662 | beq setup_map_47x | |
68343020 SP |
663 | cmplwi cr0,r3,PVR_476@h |
664 | beq setup_map_47x | |
665 | cmplwi cr0,r3,PVR_476_ISS@h | |
666 | beq setup_map_47x | |
667 | #endif /* CONFIG_PPC_47x */ | |
668 | ||
674bfa48 SP |
669 | /* |
670 | * Code for setting up 1:1 mapping for PPC440x for KEXEC | |
671 | * | |
672 | * We cannot switch off the MMU on PPC44x. | |
673 | * So we: | |
674 | * 1) Invalidate all the mappings except the one we are running from. | |
675 | * 2) Create a tmp mapping for our code in the other address space(TS) and | |
676 | * jump to it. Invalidate the entry we started in. | |
677 | * 3) Create a 1:1 mapping for 0-2GiB in chunks of 256M in original TS. | |
678 | * 4) Jump to the 1:1 mapping in original TS. | |
679 | * 5) Invalidate the tmp mapping. | |
680 | * | |
681 | * - Based on the kexec support code for FSL BookE | |
674bfa48 SP |
682 | * |
683 | */ | |
674bfa48 | 684 | |
f13bfcc6 SP |
685 | /* |
686 | * Load the PID with kernel PID (0). | |
687 | * Also load our MSR_IS and TID to MMUCR for TLB search. | |
688 | */ | |
689 | li r3, 0 | |
690 | mtspr SPRN_PID, r3 | |
674bfa48 SP |
691 | mfmsr r4 |
692 | andi. r4,r4,MSR_IS@l | |
693 | beq wmmucr | |
694 | oris r3,r3,PPC44x_MMUCR_STS@h | |
695 | wmmucr: | |
696 | mtspr SPRN_MMUCR,r3 | |
697 | sync | |
698 | ||
699 | /* | |
700 | * Invalidate all the TLB entries except the current entry | |
701 | * where we are running from | |
702 | */ | |
703 | bl 0f /* Find our address */ | |
704 | 0: mflr r5 /* Make it accessible */ | |
705 | tlbsx r23,0,r5 /* Find entry we are in */ | |
706 | li r4,0 /* Start at TLB entry 0 */ | |
707 | li r3,0 /* Set PAGEID inval value */ | |
708 | 1: cmpw r23,r4 /* Is this our entry? */ | |
709 | beq skip /* If so, skip the inval */ | |
710 | tlbwe r3,r4,PPC44x_TLB_PAGEID /* If not, inval the entry */ | |
711 | skip: | |
712 | addi r4,r4,1 /* Increment */ | |
713 | cmpwi r4,64 /* Are we done? */ | |
714 | bne 1b /* If not, repeat */ | |
715 | isync | |
716 | ||
717 | /* Create a temp mapping and jump to it */ | |
718 | andi. r6, r23, 1 /* Find the index to use */ | |
719 | addi r24, r6, 1 /* r24 will contain 1 or 2 */ | |
720 | ||
721 | mfmsr r9 /* get the MSR */ | |
722 | rlwinm r5, r9, 27, 31, 31 /* Extract the MSR[IS] */ | |
723 | xori r7, r5, 1 /* Use the other address space */ | |
724 | ||
725 | /* Read the current mapping entries */ | |
726 | tlbre r3, r23, PPC44x_TLB_PAGEID | |
727 | tlbre r4, r23, PPC44x_TLB_XLAT | |
728 | tlbre r5, r23, PPC44x_TLB_ATTRIB | |
729 | ||
730 | /* Save our current XLAT entry */ | |
731 | mr r25, r4 | |
732 | ||
733 | /* Extract the TLB PageSize */ | |
734 | li r10, 1 /* r10 will hold PageSize */ | |
735 | rlwinm r11, r3, 0, 24, 27 /* bits 24-27 */ | |
736 | ||
737 | /* XXX: As of now we use 256M, 4K pages */ | |
738 | cmpwi r11, PPC44x_TLB_256M | |
739 | bne tlb_4k | |
740 | rotlwi r10, r10, 28 /* r10 = 256M */ | |
741 | b write_out | |
742 | tlb_4k: | |
743 | cmpwi r11, PPC44x_TLB_4K | |
744 | bne default | |
745 | rotlwi r10, r10, 12 /* r10 = 4K */ | |
746 | b write_out | |
747 | default: | |
748 | rotlwi r10, r10, 10 /* r10 = 1K */ | |
749 | ||
750 | write_out: | |
751 | /* | |
752 | * Write out the tmp 1:1 mapping for this code in other address space | |
753 | * Fixup EPN = RPN , TS=other address space | |
754 | */ | |
755 | insrwi r3, r7, 1, 23 /* Bit 23 is TS for PAGEID field */ | |
756 | ||
757 | /* Write out the tmp mapping entries */ | |
758 | tlbwe r3, r24, PPC44x_TLB_PAGEID | |
759 | tlbwe r4, r24, PPC44x_TLB_XLAT | |
760 | tlbwe r5, r24, PPC44x_TLB_ATTRIB | |
761 | ||
762 | subi r11, r10, 1 /* PageOffset Mask = PageSize - 1 */ | |
763 | not r10, r11 /* Mask for PageNum */ | |
764 | ||
765 | /* Switch to other address space in MSR */ | |
766 | insrwi r9, r7, 1, 26 /* Set MSR[IS] = r7 */ | |
767 | ||
768 | bl 1f | |
769 | 1: mflr r8 | |
770 | addi r8, r8, (2f-1b) /* Find the target offset */ | |
771 | ||
772 | /* Jump to the tmp mapping */ | |
773 | mtspr SPRN_SRR0, r8 | |
774 | mtspr SPRN_SRR1, r9 | |
775 | rfi | |
776 | ||
777 | 2: | |
778 | /* Invalidate the entry we were executing from */ | |
779 | li r3, 0 | |
780 | tlbwe r3, r23, PPC44x_TLB_PAGEID | |
781 | ||
782 | /* attribute fields. rwx for SUPERVISOR mode */ | |
783 | li r5, 0 | |
784 | ori r5, r5, (PPC44x_TLB_SW | PPC44x_TLB_SR | PPC44x_TLB_SX | PPC44x_TLB_G) | |
785 | ||
786 | /* Create 1:1 mapping in 256M pages */ | |
787 | xori r7, r7, 1 /* Revert back to Original TS */ | |
788 | ||
789 | li r8, 0 /* PageNumber */ | |
790 | li r6, 3 /* TLB Index, start at 3 */ | |
791 | ||
792 | next_tlb: | |
793 | rotlwi r3, r8, 28 /* Create EPN (bits 0-3) */ | |
794 | mr r4, r3 /* RPN = EPN */ | |
795 | ori r3, r3, (PPC44x_TLB_VALID | PPC44x_TLB_256M) /* SIZE = 256M, Valid */ | |
796 | insrwi r3, r7, 1, 23 /* Set TS from r7 */ | |
797 | ||
798 | tlbwe r3, r6, PPC44x_TLB_PAGEID /* PageID field : EPN, V, SIZE */ | |
799 | tlbwe r4, r6, PPC44x_TLB_XLAT /* Address translation : RPN */ | |
800 | tlbwe r5, r6, PPC44x_TLB_ATTRIB /* Attributes */ | |
801 | ||
802 | addi r8, r8, 1 /* Increment PN */ | |
803 | addi r6, r6, 1 /* Increment TLB Index */ | |
804 | cmpwi r8, 8 /* Are we done ? */ | |
805 | bne next_tlb | |
806 | isync | |
807 | ||
808 | /* Jump to the new mapping 1:1 */ | |
809 | li r9,0 | |
810 | insrwi r9, r7, 1, 26 /* Set MSR[IS] = r7 */ | |
811 | ||
812 | bl 1f | |
813 | 1: mflr r8 | |
814 | and r8, r8, r11 /* Get our offset within page */ | |
815 | addi r8, r8, (2f-1b) | |
816 | ||
817 | and r5, r25, r10 /* Get our target PageNum */ | |
818 | or r8, r8, r5 /* Target jump address */ | |
819 | ||
820 | mtspr SPRN_SRR0, r8 | |
821 | mtspr SPRN_SRR1, r9 | |
822 | rfi | |
823 | 2: | |
824 | /* Invalidate the tmp entry we used */ | |
825 | li r3, 0 | |
826 | tlbwe r3, r24, PPC44x_TLB_PAGEID | |
827 | sync | |
68343020 SP |
828 | b ppc44x_map_done |
829 | ||
830 | #ifdef CONFIG_PPC_47x | |
831 | ||
832 | /* 1:1 mapping for 47x */ | |
833 | ||
834 | setup_map_47x: | |
835 | ||
836 | /* | |
837 | * Load the kernel pid (0) to PID and also to MMUCR[TID]. | |
838 | * Also set the MSR IS->MMUCR STS | |
839 | */ | |
840 | li r3, 0 | |
841 | mtspr SPRN_PID, r3 /* Set PID */ | |
842 | mfmsr r4 /* Get MSR */ | |
843 | andi. r4, r4, MSR_IS@l /* TS=1? */ | |
844 | beq 1f /* If not, leave STS=0 */ | |
845 | oris r3, r3, PPC47x_MMUCR_STS@h /* Set STS=1 */ | |
846 | 1: mtspr SPRN_MMUCR, r3 /* Put MMUCR */ | |
847 | sync | |
848 | ||
849 | /* Find the entry we are running from */ | |
850 | bl 2f | |
851 | 2: mflr r23 | |
852 | tlbsx r23, 0, r23 | |
853 | tlbre r24, r23, 0 /* TLB Word 0 */ | |
854 | tlbre r25, r23, 1 /* TLB Word 1 */ | |
855 | tlbre r26, r23, 2 /* TLB Word 2 */ | |
856 | ||
857 | ||
858 | /* | |
859 | * Invalidates all the tlb entries by writing to 256 RPNs(r4) | |
860 | * of 4k page size in all 4 ways (0-3 in r3). | |
861 | * This would invalidate the entire UTLB including the one we are | |
862 | * running from. However the shadow TLB entries would help us | |
863 | * to continue the execution, until we flush them (rfi/isync). | |
864 | */ | |
865 | addis r3, 0, 0x8000 /* specify the way */ | |
866 | addi r4, 0, 0 /* TLB Word0 = (EPN=0, VALID = 0) */ | |
867 | addi r5, 0, 0 | |
868 | b clear_utlb_entry | |
869 | ||
870 | /* Align the loop to speed things up. from head_44x.S */ | |
871 | .align 6 | |
872 | ||
873 | clear_utlb_entry: | |
874 | ||
875 | tlbwe r4, r3, 0 | |
876 | tlbwe r5, r3, 1 | |
877 | tlbwe r5, r3, 2 | |
878 | addis r3, r3, 0x2000 /* Increment the way */ | |
879 | cmpwi r3, 0 | |
880 | bne clear_utlb_entry | |
881 | addis r3, 0, 0x8000 | |
882 | addis r4, r4, 0x100 /* Increment the EPN */ | |
883 | cmpwi r4, 0 | |
884 | bne clear_utlb_entry | |
885 | ||
886 | /* Create the entries in the other address space */ | |
887 | mfmsr r5 | |
888 | rlwinm r7, r5, 27, 31, 31 /* Get the TS (Bit 26) from MSR */ | |
889 | xori r7, r7, 1 /* r7 = !TS */ | |
890 | ||
891 | insrwi r24, r7, 1, 21 /* Change the TS in the saved TLB word 0 */ | |
892 | ||
893 | /* | |
894 | * write out the TLB entries for the tmp mapping | |
895 | * Use way '0' so that we could easily invalidate it later. | |
896 | */ | |
897 | lis r3, 0x8000 /* Way '0' */ | |
898 | ||
899 | tlbwe r24, r3, 0 | |
900 | tlbwe r25, r3, 1 | |
901 | tlbwe r26, r3, 2 | |
902 | ||
903 | /* Update the msr to the new TS */ | |
904 | insrwi r5, r7, 1, 26 | |
905 | ||
906 | bl 1f | |
907 | 1: mflr r6 | |
908 | addi r6, r6, (2f-1b) | |
909 | ||
910 | mtspr SPRN_SRR0, r6 | |
911 | mtspr SPRN_SRR1, r5 | |
912 | rfi | |
913 | ||
914 | /* | |
915 | * Now we are in the tmp address space. | |
916 | * Create a 1:1 mapping for 0-2GiB in the original TS. | |
917 | */ | |
918 | 2: | |
919 | li r3, 0 | |
920 | li r4, 0 /* TLB Word 0 */ | |
921 | li r5, 0 /* TLB Word 1 */ | |
922 | li r6, 0 | |
923 | ori r6, r6, PPC47x_TLB2_S_RWX /* TLB word 2 */ | |
924 | ||
925 | li r8, 0 /* PageIndex */ | |
926 | ||
927 | xori r7, r7, 1 /* revert back to original TS */ | |
928 | ||
929 | write_utlb: | |
930 | rotlwi r5, r8, 28 /* RPN = PageIndex * 256M */ | |
931 | /* ERPN = 0 as we don't use memory above 2G */ | |
932 | ||
933 | mr r4, r5 /* EPN = RPN */ | |
934 | ori r4, r4, (PPC47x_TLB0_VALID | PPC47x_TLB0_256M) | |
935 | insrwi r4, r7, 1, 21 /* Insert the TS to Word 0 */ | |
936 | ||
937 | tlbwe r4, r3, 0 /* Write out the entries */ | |
938 | tlbwe r5, r3, 1 | |
939 | tlbwe r6, r3, 2 | |
940 | addi r8, r8, 1 | |
941 | cmpwi r8, 8 /* Have we completed ? */ | |
942 | bne write_utlb | |
943 | ||
944 | /* make sure we complete the TLB write up */ | |
945 | isync | |
946 | ||
947 | /* | |
948 | * Prepare to jump to the 1:1 mapping. | |
949 | * 1) Extract page size of the tmp mapping | |
950 | * DSIZ = TLB_Word0[22:27] | |
951 | * 2) Calculate the physical address of the address | |
952 | * to jump to. | |
953 | */ | |
954 | rlwinm r10, r24, 0, 22, 27 | |
955 | ||
956 | cmpwi r10, PPC47x_TLB0_4K | |
957 | bne 0f | |
958 | li r10, 0x1000 /* r10 = 4k */ | |
959 | bl 1f | |
960 | ||
961 | 0: | |
962 | /* Defaults to 256M */ | |
963 | lis r10, 0x1000 | |
964 | ||
965 | bl 1f | |
966 | 1: mflr r4 | |
967 | addi r4, r4, (2f-1b) /* virtual address of 2f */ | |
968 | ||
969 | subi r11, r10, 1 /* offsetmask = Pagesize - 1 */ | |
970 | not r10, r11 /* Pagemask = ~(offsetmask) */ | |
971 | ||
972 | and r5, r25, r10 /* Physical page */ | |
973 | and r6, r4, r11 /* offset within the current page */ | |
974 | ||
975 | or r5, r5, r6 /* Physical address for 2f */ | |
976 | ||
977 | /* Switch the TS in MSR to the original one */ | |
978 | mfmsr r8 | |
979 | insrwi r8, r7, 1, 26 | |
980 | ||
981 | mtspr SPRN_SRR1, r8 | |
982 | mtspr SPRN_SRR0, r5 | |
983 | rfi | |
984 | ||
985 | 2: | |
986 | /* Invalidate the tmp mapping */ | |
987 | lis r3, 0x8000 /* Way '0' */ | |
988 | ||
989 | clrrwi r24, r24, 12 /* Clear the valid bit */ | |
990 | tlbwe r24, r3, 0 | |
991 | tlbwe r25, r3, 1 | |
992 | tlbwe r26, r3, 2 | |
993 | ||
994 | /* Make sure we complete the TLB write and flush the shadow TLB */ | |
995 | isync | |
996 | ||
997 | #endif | |
998 | ||
999 | ppc44x_map_done: | |
1000 | ||
674bfa48 SP |
1001 | |
1002 | /* Restore the parameters */ | |
1003 | mr r3, r29 | |
1004 | mr r4, r30 | |
1005 | mr r5, r31 | |
1006 | ||
b3df895a SAS |
1007 | li r0, 0 |
1008 | #else | |
3d1229d6 ME |
1009 | li r0, 0 |
1010 | ||
1011 | /* | |
1012 | * Set Machine Status Register to a known status, | |
1013 | * switch the MMU off and jump to 1: in a single step. | |
1014 | */ | |
1015 | ||
1016 | mr r8, r0 | |
1017 | ori r8, r8, MSR_RI|MSR_ME | |
1018 | mtspr SPRN_SRR1, r8 | |
1019 | addi r8, r4, 1f - relocate_new_kernel | |
1020 | mtspr SPRN_SRR0, r8 | |
1021 | sync | |
1022 | rfi | |
1023 | ||
1024 | 1: | |
b3df895a | 1025 | #endif |
3d1229d6 ME |
1026 | /* from this point address translation is turned off */ |
1027 | /* and interrupts are disabled */ | |
1028 | ||
1029 | /* set a new stack at the bottom of our page... */ | |
1030 | /* (not really needed now) */ | |
d9178f4c | 1031 | addi r1, r4, KEXEC_CONTROL_PAGE_SIZE - 8 /* for LR Save+Back Chain */ |
3d1229d6 ME |
1032 | stw r0, 0(r1) |
1033 | ||
1034 | /* Do the copies */ | |
1035 | li r6, 0 /* checksum */ | |
1036 | mr r0, r3 | |
1037 | b 1f | |
1038 | ||
1039 | 0: /* top, read another word for the indirection page */ | |
1040 | lwzu r0, 4(r3) | |
1041 | ||
1042 | 1: | |
1043 | /* is it a destination page? (r8) */ | |
1044 | rlwinm. r7, r0, 0, 31, 31 /* IND_DESTINATION (1<<0) */ | |
1045 | beq 2f | |
1046 | ||
1047 | rlwinm r8, r0, 0, 0, 19 /* clear kexec flags, page align */ | |
1048 | b 0b | |
1049 | ||
1050 | 2: /* is it an indirection page? (r3) */ | |
1051 | rlwinm. r7, r0, 0, 30, 30 /* IND_INDIRECTION (1<<1) */ | |
1052 | beq 2f | |
1053 | ||
1054 | rlwinm r3, r0, 0, 0, 19 /* clear kexec flags, page align */ | |
1055 | subi r3, r3, 4 | |
1056 | b 0b | |
1057 | ||
1058 | 2: /* are we done? */ | |
1059 | rlwinm. r7, r0, 0, 29, 29 /* IND_DONE (1<<2) */ | |
1060 | beq 2f | |
1061 | b 3f | |
1062 | ||
1063 | 2: /* is it a source page? (r9) */ | |
1064 | rlwinm. r7, r0, 0, 28, 28 /* IND_SOURCE (1<<3) */ | |
1065 | beq 0b | |
1066 | ||
1067 | rlwinm r9, r0, 0, 0, 19 /* clear kexec flags, page align */ | |
1068 | ||
1069 | li r7, PAGE_SIZE / 4 | |
1070 | mtctr r7 | |
1071 | subi r9, r9, 4 | |
1072 | subi r8, r8, 4 | |
1073 | 9: | |
1074 | lwzu r0, 4(r9) /* do the copy */ | |
1075 | xor r6, r6, r0 | |
1076 | stwu r0, 4(r8) | |
1077 | dcbst 0, r8 | |
1078 | sync | |
1079 | icbi 0, r8 | |
1080 | bdnz 9b | |
1081 | ||
1082 | addi r9, r9, 4 | |
1083 | addi r8, r8, 4 | |
1084 | b 0b | |
1085 | ||
1086 | 3: | |
1087 | ||
1088 | /* To be certain of avoiding problems with self-modifying code | |
1089 | * execute a serializing instruction here. | |
1090 | */ | |
1091 | isync | |
1092 | sync | |
1093 | ||
4562c986 MM |
1094 | mfspr r3, SPRN_PIR /* current core we are running on */ |
1095 | mr r4, r5 /* load physical address of chunk called */ | |
1096 | ||
3d1229d6 ME |
1097 | /* jump to the entry point, usually the setup routine */ |
1098 | mtlr r5 | |
1099 | blrl | |
1100 | ||
1101 | 1: b 1b | |
1102 | ||
1103 | relocate_new_kernel_end: | |
1104 | ||
1105 | .globl relocate_new_kernel_size | |
1106 | relocate_new_kernel_size: | |
1107 | .long relocate_new_kernel_end - relocate_new_kernel | |
1108 | #endif |