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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> |
9445aa1a | 36 | #include <asm/export.h> |
9994a338 PM |
37 | |
38 | .text | |
39 | ||
cbc9565e BH |
40 | /* |
41 | * We store the saved ksp_limit in the unused part | |
42 | * of the STACK_FRAME_OVERHEAD | |
43 | */ | |
85218827 KG |
44 | _GLOBAL(call_do_softirq) |
45 | mflr r0 | |
46 | stw r0,4(r1) | |
cbc9565e BH |
47 | lwz r10,THREAD+KSP_LIMIT(r2) |
48 | addi r11,r3,THREAD_INFO_GAP | |
85218827 KG |
49 | stwu r1,THREAD_SIZE-STACK_FRAME_OVERHEAD(r3) |
50 | mr r1,r3 | |
cbc9565e BH |
51 | stw r10,8(r1) |
52 | stw r11,THREAD+KSP_LIMIT(r2) | |
85218827 | 53 | bl __do_softirq |
cbc9565e | 54 | lwz r10,8(r1) |
85218827 KG |
55 | lwz r1,0(r1) |
56 | lwz r0,4(r1) | |
cbc9565e | 57 | stw r10,THREAD+KSP_LIMIT(r2) |
85218827 KG |
58 | mtlr r0 |
59 | blr | |
60 | ||
1a18a664 KH |
61 | /* |
62 | * void call_do_irq(struct pt_regs *regs, struct thread_info *irqtp); | |
63 | */ | |
0366a1c7 | 64 | _GLOBAL(call_do_irq) |
85218827 KG |
65 | mflr r0 |
66 | stw r0,4(r1) | |
cbc9565e | 67 | lwz r10,THREAD+KSP_LIMIT(r2) |
1a18a664 | 68 | addi r11,r4,THREAD_INFO_GAP |
0366a1c7 BH |
69 | stwu r1,THREAD_SIZE-STACK_FRAME_OVERHEAD(r4) |
70 | mr r1,r4 | |
cbc9565e BH |
71 | stw r10,8(r1) |
72 | stw r11,THREAD+KSP_LIMIT(r2) | |
0366a1c7 | 73 | bl __do_irq |
cbc9565e | 74 | lwz r10,8(r1) |
85218827 KG |
75 | lwz r1,0(r1) |
76 | lwz r0,4(r1) | |
cbc9565e | 77 | stw r10,THREAD+KSP_LIMIT(r2) |
85218827 KG |
78 | mtlr r0 |
79 | blr | |
85218827 | 80 | |
f2783c15 PM |
81 | /* |
82 | * This returns the high 64 bits of the product of two 64-bit numbers. | |
83 | */ | |
84 | _GLOBAL(mulhdu) | |
85 | cmpwi r6,0 | |
86 | cmpwi cr1,r3,0 | |
87 | mr r10,r4 | |
88 | mulhwu r4,r4,r5 | |
89 | beq 1f | |
90 | mulhwu r0,r10,r6 | |
91 | mullw r7,r10,r5 | |
92 | addc r7,r0,r7 | |
93 | addze r4,r4 | |
94 | 1: beqlr cr1 /* all done if high part of A is 0 */ | |
f2783c15 | 95 | mullw r9,r3,r5 |
737b01fc | 96 | mulhwu r10,r3,r5 |
f2783c15 | 97 | beq 2f |
737b01fc CL |
98 | mullw r0,r3,r6 |
99 | mulhwu r8,r3,r6 | |
f2783c15 PM |
100 | addc r7,r0,r7 |
101 | adde r4,r4,r8 | |
737b01fc | 102 | addze r10,r10 |
f2783c15 | 103 | 2: addc r4,r4,r9 |
737b01fc | 104 | addze r3,r10 |
f2783c15 PM |
105 | blr |
106 | ||
9994a338 PM |
107 | /* |
108 | * reloc_got2 runs through the .got2 section adding an offset | |
109 | * to each entry. | |
110 | */ | |
111 | _GLOBAL(reloc_got2) | |
112 | mflr r11 | |
113 | lis r7,__got2_start@ha | |
114 | addi r7,r7,__got2_start@l | |
115 | lis r8,__got2_end@ha | |
116 | addi r8,r8,__got2_end@l | |
117 | subf r8,r7,r8 | |
118 | srwi. r8,r8,2 | |
119 | beqlr | |
120 | mtctr r8 | |
121 | bl 1f | |
122 | 1: mflr r0 | |
123 | lis r4,1b@ha | |
124 | addi r4,r4,1b@l | |
125 | subf r0,r4,r0 | |
126 | add r7,r0,r7 | |
127 | 2: lwz r0,0(r7) | |
128 | add r0,r0,r3 | |
129 | stw r0,0(r7) | |
130 | addi r7,r7,4 | |
131 | bdnz 2b | |
132 | mtlr r11 | |
133 | blr | |
134 | ||
9994a338 PM |
135 | /* |
136 | * call_setup_cpu - call the setup_cpu function for this cpu | |
137 | * r3 = data offset, r24 = cpu number | |
138 | * | |
139 | * Setup function is called with: | |
140 | * r3 = data offset | |
141 | * r4 = ptr to CPU spec (relocated) | |
142 | */ | |
143 | _GLOBAL(call_setup_cpu) | |
144 | addis r4,r3,cur_cpu_spec@ha | |
145 | addi r4,r4,cur_cpu_spec@l | |
146 | lwz r4,0(r4) | |
147 | add r4,r4,r3 | |
148 | lwz r5,CPU_SPEC_SETUP(r4) | |
b26f100d | 149 | cmpwi 0,r5,0 |
9994a338 PM |
150 | add r5,r5,r3 |
151 | beqlr | |
152 | mtctr r5 | |
153 | bctr | |
154 | ||
155 | #if defined(CONFIG_CPU_FREQ_PMAC) && defined(CONFIG_6xx) | |
156 | ||
157 | /* This gets called by via-pmu.c to switch the PLL selection | |
158 | * on 750fx CPU. This function should really be moved to some | |
159 | * other place (as most of the cpufreq code in via-pmu | |
160 | */ | |
161 | _GLOBAL(low_choose_750fx_pll) | |
162 | /* Clear MSR:EE */ | |
163 | mfmsr r7 | |
164 | rlwinm r0,r7,0,17,15 | |
165 | mtmsr r0 | |
166 | ||
167 | /* If switching to PLL1, disable HID0:BTIC */ | |
168 | cmplwi cr0,r3,0 | |
169 | beq 1f | |
170 | mfspr r5,SPRN_HID0 | |
171 | rlwinm r5,r5,0,27,25 | |
172 | sync | |
173 | mtspr SPRN_HID0,r5 | |
174 | isync | |
175 | sync | |
176 | ||
177 | 1: | |
178 | /* Calc new HID1 value */ | |
179 | mfspr r4,SPRN_HID1 /* Build a HID1:PS bit from parameter */ | |
180 | rlwinm r5,r3,16,15,15 /* Clear out HID1:PS from value read */ | |
181 | rlwinm r4,r4,0,16,14 /* Could have I used rlwimi here ? */ | |
182 | or r4,r4,r5 | |
183 | mtspr SPRN_HID1,r4 | |
184 | ||
185 | /* Store new HID1 image */ | |
9778b696 | 186 | CURRENT_THREAD_INFO(r6, r1) |
9994a338 PM |
187 | lwz r6,TI_CPU(r6) |
188 | slwi r6,r6,2 | |
189 | addis r6,r6,nap_save_hid1@ha | |
190 | stw r4,nap_save_hid1@l(r6) | |
191 | ||
192 | /* If switching to PLL0, enable HID0:BTIC */ | |
193 | cmplwi cr0,r3,0 | |
194 | bne 1f | |
195 | mfspr r5,SPRN_HID0 | |
196 | ori r5,r5,HID0_BTIC | |
197 | sync | |
198 | mtspr SPRN_HID0,r5 | |
199 | isync | |
200 | sync | |
201 | ||
202 | 1: | |
203 | /* Return */ | |
204 | mtmsr r7 | |
205 | blr | |
206 | ||
207 | _GLOBAL(low_choose_7447a_dfs) | |
208 | /* Clear MSR:EE */ | |
209 | mfmsr r7 | |
210 | rlwinm r0,r7,0,17,15 | |
211 | mtmsr r0 | |
212 | ||
213 | /* Calc new HID1 value */ | |
214 | mfspr r4,SPRN_HID1 | |
215 | insrwi r4,r3,1,9 /* insert parameter into bit 9 */ | |
216 | sync | |
217 | mtspr SPRN_HID1,r4 | |
218 | sync | |
219 | isync | |
220 | ||
221 | /* Return */ | |
222 | mtmsr r7 | |
223 | blr | |
224 | ||
225 | #endif /* CONFIG_CPU_FREQ_PMAC && CONFIG_6xx */ | |
226 | ||
227 | /* | |
228 | * complement mask on the msr then "or" some values on. | |
229 | * _nmask_and_or_msr(nmask, value_to_or) | |
230 | */ | |
231 | _GLOBAL(_nmask_and_or_msr) | |
232 | mfmsr r0 /* Get current msr */ | |
233 | andc r0,r0,r3 /* And off the bits set in r3 (first parm) */ | |
234 | or r0,r0,r4 /* Or on the bits in r4 (second parm) */ | |
235 | SYNC /* Some chip revs have problems here... */ | |
236 | mtmsr r0 /* Update machine state */ | |
237 | isync | |
238 | blr /* Done */ | |
239 | ||
9dae8afd BH |
240 | #ifdef CONFIG_40x |
241 | ||
242 | /* | |
243 | * Do an IO access in real mode | |
244 | */ | |
245 | _GLOBAL(real_readb) | |
246 | mfmsr r7 | |
247 | ori r0,r7,MSR_DR | |
248 | xori r0,r0,MSR_DR | |
249 | sync | |
250 | mtmsr r0 | |
251 | sync | |
252 | isync | |
253 | lbz r3,0(r3) | |
254 | sync | |
255 | mtmsr r7 | |
256 | sync | |
257 | isync | |
258 | blr | |
259 | ||
260 | /* | |
261 | * Do an IO access in real mode | |
262 | */ | |
263 | _GLOBAL(real_writeb) | |
264 | mfmsr r7 | |
265 | ori r0,r7,MSR_DR | |
266 | xori r0,r0,MSR_DR | |
267 | sync | |
268 | mtmsr r0 | |
269 | sync | |
270 | isync | |
271 | stb r3,0(r4) | |
272 | sync | |
273 | mtmsr r7 | |
274 | sync | |
275 | isync | |
276 | blr | |
277 | ||
278 | #endif /* CONFIG_40x */ | |
9994a338 | 279 | |
0ba3418b | 280 | |
9994a338 PM |
281 | /* |
282 | * Flush instruction cache. | |
283 | * This is a no-op on the 601. | |
284 | */ | |
766d45cb | 285 | #ifndef CONFIG_PPC_8xx |
9994a338 | 286 | _GLOBAL(flush_instruction_cache) |
766d45cb | 287 | #if defined(CONFIG_4xx) |
9994a338 PM |
288 | #ifdef CONFIG_403GCX |
289 | li r3, 512 | |
290 | mtctr r3 | |
291 | lis r4, KERNELBASE@h | |
292 | 1: iccci 0, r4 | |
293 | addi r4, r4, 16 | |
294 | bdnz 1b | |
295 | #else | |
296 | lis r3, KERNELBASE@h | |
297 | iccci 0,r3 | |
298 | #endif | |
299 | #elif CONFIG_FSL_BOOKE | |
300 | BEGIN_FTR_SECTION | |
301 | mfspr r3,SPRN_L1CSR0 | |
302 | ori r3,r3,L1CSR0_CFI|L1CSR0_CLFC | |
303 | /* msync; isync recommended here */ | |
304 | mtspr SPRN_L1CSR0,r3 | |
305 | isync | |
306 | blr | |
4508dc21 | 307 | END_FTR_SECTION_IFSET(CPU_FTR_UNIFIED_ID_CACHE) |
9994a338 PM |
308 | mfspr r3,SPRN_L1CSR1 |
309 | ori r3,r3,L1CSR1_ICFI|L1CSR1_ICLFR | |
310 | mtspr SPRN_L1CSR1,r3 | |
311 | #else | |
312 | mfspr r3,SPRN_PVR | |
313 | rlwinm r3,r3,16,16,31 | |
314 | cmpwi 0,r3,1 | |
315 | beqlr /* for 601, do nothing */ | |
316 | /* 603/604 processor - use invalidate-all bit in HID0 */ | |
317 | mfspr r3,SPRN_HID0 | |
318 | ori r3,r3,HID0_ICFI | |
319 | mtspr SPRN_HID0,r3 | |
766d45cb | 320 | #endif /* CONFIG_4xx */ |
9994a338 PM |
321 | isync |
322 | blr | |
9445aa1a | 323 | EXPORT_SYMBOL(flush_instruction_cache) |
766d45cb | 324 | #endif /* CONFIG_PPC_8xx */ |
9994a338 PM |
325 | |
326 | /* | |
327 | * Write any modified data cache blocks out to memory | |
328 | * and invalidate the corresponding instruction cache blocks. | |
329 | * This is a no-op on the 601. | |
330 | * | |
331 | * flush_icache_range(unsigned long start, unsigned long stop) | |
332 | */ | |
6f698df1 | 333 | _GLOBAL(flush_icache_range) |
9994a338 | 334 | BEGIN_FTR_SECTION |
0ce63670 | 335 | PURGE_PREFETCHED_INS |
9994a338 | 336 | blr /* for 601, do nothing */ |
4508dc21 | 337 | END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE) |
716fa91d | 338 | rlwinm r3,r3,0,0,31 - L1_CACHE_SHIFT |
9994a338 | 339 | subf r4,r3,r4 |
716fa91d | 340 | addi r4,r4,L1_CACHE_BYTES - 1 |
7dffb720 | 341 | srwi. r4,r4,L1_CACHE_SHIFT |
9994a338 PM |
342 | beqlr |
343 | mtctr r4 | |
344 | mr r6,r3 | |
345 | 1: dcbst 0,r3 | |
7dffb720 | 346 | addi r3,r3,L1_CACHE_BYTES |
9994a338 PM |
347 | bdnz 1b |
348 | sync /* wait for dcbst's to get to ram */ | |
14d75752 | 349 | #ifndef CONFIG_44x |
9994a338 PM |
350 | mtctr r4 |
351 | 2: icbi 0,r6 | |
7dffb720 | 352 | addi r6,r6,L1_CACHE_BYTES |
9994a338 | 353 | bdnz 2b |
14d75752 JB |
354 | #else |
355 | /* Flash invalidate on 44x because we are passed kmapped addresses and | |
356 | this doesn't work for userspace pages due to the virtually tagged | |
357 | icache. Sigh. */ | |
358 | iccci 0, r0 | |
359 | #endif | |
9994a338 PM |
360 | sync /* additional sync needed on g4 */ |
361 | isync | |
362 | blr | |
6f698df1 | 363 | _ASM_NOKPROBE_SYMBOL(flush_icache_range) |
9445aa1a | 364 | EXPORT_SYMBOL(flush_icache_range) |
6f698df1 | 365 | |
9994a338 PM |
366 | /* |
367 | * Flush a particular page from the data cache to RAM. | |
368 | * Note: this is necessary because the instruction cache does *not* | |
369 | * snoop from the data cache. | |
370 | * This is a no-op on the 601 which has a unified cache. | |
371 | * | |
372 | * void __flush_dcache_icache(void *page) | |
373 | */ | |
374 | _GLOBAL(__flush_dcache_icache) | |
375 | BEGIN_FTR_SECTION | |
0ce63670 | 376 | PURGE_PREFETCHED_INS |
4508dc21 DG |
377 | blr |
378 | END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE) | |
ca9153a3 IY |
379 | rlwinm r3,r3,0,0,31-PAGE_SHIFT /* Get page base address */ |
380 | li r4,PAGE_SIZE/L1_CACHE_BYTES /* Number of lines in a page */ | |
9994a338 PM |
381 | mtctr r4 |
382 | mr r6,r3 | |
383 | 0: dcbst 0,r3 /* Write line to ram */ | |
7dffb720 | 384 | addi r3,r3,L1_CACHE_BYTES |
9994a338 PM |
385 | bdnz 0b |
386 | sync | |
e7f75ad0 | 387 | #ifdef CONFIG_44x |
b98ac05d BH |
388 | /* We don't flush the icache on 44x. Those have a virtual icache |
389 | * and we don't have access to the virtual address here (it's | |
390 | * not the page vaddr but where it's mapped in user space). The | |
391 | * flushing of the icache on these is handled elsewhere, when | |
392 | * a change in the address space occurs, before returning to | |
393 | * user space | |
394 | */ | |
e7f75ad0 DK |
395 | BEGIN_MMU_FTR_SECTION |
396 | blr | |
397 | END_MMU_FTR_SECTION_IFSET(MMU_FTR_TYPE_44x) | |
398 | #endif /* CONFIG_44x */ | |
9994a338 PM |
399 | mtctr r4 |
400 | 1: icbi 0,r6 | |
7dffb720 | 401 | addi r6,r6,L1_CACHE_BYTES |
9994a338 PM |
402 | bdnz 1b |
403 | sync | |
404 | isync | |
405 | blr | |
406 | ||
e7f75ad0 | 407 | #ifndef CONFIG_BOOKE |
9994a338 PM |
408 | /* |
409 | * Flush a particular page from the data cache to RAM, identified | |
410 | * by its physical address. We turn off the MMU so we can just use | |
411 | * the physical address (this may be a highmem page without a kernel | |
412 | * mapping). | |
413 | * | |
414 | * void __flush_dcache_icache_phys(unsigned long physaddr) | |
415 | */ | |
416 | _GLOBAL(__flush_dcache_icache_phys) | |
417 | BEGIN_FTR_SECTION | |
0ce63670 | 418 | PURGE_PREFETCHED_INS |
9994a338 | 419 | blr /* for 601, do nothing */ |
4508dc21 | 420 | END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE) |
9994a338 PM |
421 | mfmsr r10 |
422 | rlwinm r0,r10,0,28,26 /* clear DR */ | |
423 | mtmsr r0 | |
424 | isync | |
ca9153a3 IY |
425 | rlwinm r3,r3,0,0,31-PAGE_SHIFT /* Get page base address */ |
426 | li r4,PAGE_SIZE/L1_CACHE_BYTES /* Number of lines in a page */ | |
9994a338 PM |
427 | mtctr r4 |
428 | mr r6,r3 | |
429 | 0: dcbst 0,r3 /* Write line to ram */ | |
7dffb720 | 430 | addi r3,r3,L1_CACHE_BYTES |
9994a338 PM |
431 | bdnz 0b |
432 | sync | |
433 | mtctr r4 | |
434 | 1: icbi 0,r6 | |
7dffb720 | 435 | addi r6,r6,L1_CACHE_BYTES |
9994a338 PM |
436 | bdnz 1b |
437 | sync | |
438 | mtmsr r10 /* restore DR */ | |
439 | isync | |
440 | blr | |
e7f75ad0 | 441 | #endif /* CONFIG_BOOKE */ |
9994a338 | 442 | |
9994a338 PM |
443 | /* |
444 | * Copy a whole page. We use the dcbz instruction on the destination | |
445 | * to reduce memory traffic (it eliminates the unnecessary reads of | |
446 | * the destination into cache). This requires that the destination | |
447 | * is cacheable. | |
448 | */ | |
449 | #define COPY_16_BYTES \ | |
450 | lwz r6,4(r4); \ | |
451 | lwz r7,8(r4); \ | |
452 | lwz r8,12(r4); \ | |
453 | lwzu r9,16(r4); \ | |
454 | stw r6,4(r3); \ | |
455 | stw r7,8(r3); \ | |
456 | stw r8,12(r3); \ | |
457 | stwu r9,16(r3) | |
458 | ||
459 | _GLOBAL(copy_page) | |
460 | addi r3,r3,-4 | |
461 | addi r4,r4,-4 | |
462 | ||
9994a338 PM |
463 | li r5,4 |
464 | ||
465 | #if MAX_COPY_PREFETCH > 1 | |
466 | li r0,MAX_COPY_PREFETCH | |
467 | li r11,4 | |
468 | mtctr r0 | |
469 | 11: dcbt r11,r4 | |
7dffb720 | 470 | addi r11,r11,L1_CACHE_BYTES |
9994a338 PM |
471 | bdnz 11b |
472 | #else /* MAX_COPY_PREFETCH == 1 */ | |
473 | dcbt r5,r4 | |
7dffb720 | 474 | li r11,L1_CACHE_BYTES+4 |
9994a338 | 475 | #endif /* MAX_COPY_PREFETCH */ |
ca9153a3 | 476 | li r0,PAGE_SIZE/L1_CACHE_BYTES - MAX_COPY_PREFETCH |
9994a338 PM |
477 | crclr 4*cr0+eq |
478 | 2: | |
479 | mtctr r0 | |
480 | 1: | |
481 | dcbt r11,r4 | |
482 | dcbz r5,r3 | |
483 | COPY_16_BYTES | |
7dffb720 | 484 | #if L1_CACHE_BYTES >= 32 |
9994a338 | 485 | COPY_16_BYTES |
7dffb720 | 486 | #if L1_CACHE_BYTES >= 64 |
9994a338 PM |
487 | COPY_16_BYTES |
488 | COPY_16_BYTES | |
7dffb720 | 489 | #if L1_CACHE_BYTES >= 128 |
9994a338 PM |
490 | COPY_16_BYTES |
491 | COPY_16_BYTES | |
492 | COPY_16_BYTES | |
493 | COPY_16_BYTES | |
494 | #endif | |
495 | #endif | |
496 | #endif | |
497 | bdnz 1b | |
498 | beqlr | |
499 | crnot 4*cr0+eq,4*cr0+eq | |
500 | li r0,MAX_COPY_PREFETCH | |
501 | li r11,4 | |
502 | b 2b | |
9445aa1a | 503 | EXPORT_SYMBOL(copy_page) |
9994a338 | 504 | |
9994a338 PM |
505 | /* |
506 | * Extended precision shifts. | |
507 | * | |
508 | * Updated to be valid for shift counts from 0 to 63 inclusive. | |
509 | * -- Gabriel | |
510 | * | |
511 | * R3/R4 has 64 bit value | |
512 | * R5 has shift count | |
513 | * result in R3/R4 | |
514 | * | |
515 | * ashrdi3: arithmetic right shift (sign propagation) | |
516 | * lshrdi3: logical right shift | |
517 | * ashldi3: left shift | |
518 | */ | |
519 | _GLOBAL(__ashrdi3) | |
520 | subfic r6,r5,32 | |
521 | srw r4,r4,r5 # LSW = count > 31 ? 0 : LSW >> count | |
522 | addi r7,r5,32 # could be xori, or addi with -32 | |
523 | slw r6,r3,r6 # t1 = count > 31 ? 0 : MSW << (32-count) | |
524 | rlwinm r8,r7,0,32 # t3 = (count < 32) ? 32 : 0 | |
525 | sraw r7,r3,r7 # t2 = MSW >> (count-32) | |
526 | or r4,r4,r6 # LSW |= t1 | |
527 | slw r7,r7,r8 # t2 = (count < 32) ? 0 : t2 | |
528 | sraw r3,r3,r5 # MSW = MSW >> count | |
529 | or r4,r4,r7 # LSW |= t2 | |
530 | blr | |
9445aa1a | 531 | EXPORT_SYMBOL(__ashrdi3) |
9994a338 PM |
532 | |
533 | _GLOBAL(__ashldi3) | |
534 | subfic r6,r5,32 | |
535 | slw r3,r3,r5 # MSW = count > 31 ? 0 : MSW << count | |
536 | addi r7,r5,32 # could be xori, or addi with -32 | |
537 | srw r6,r4,r6 # t1 = count > 31 ? 0 : LSW >> (32-count) | |
538 | slw r7,r4,r7 # t2 = count < 32 ? 0 : LSW << (count-32) | |
539 | or r3,r3,r6 # MSW |= t1 | |
540 | slw r4,r4,r5 # LSW = LSW << count | |
541 | or r3,r3,r7 # MSW |= t2 | |
542 | blr | |
9445aa1a | 543 | EXPORT_SYMBOL(__ashldi3) |
9994a338 PM |
544 | |
545 | _GLOBAL(__lshrdi3) | |
546 | subfic r6,r5,32 | |
547 | srw r4,r4,r5 # LSW = count > 31 ? 0 : LSW >> count | |
548 | addi r7,r5,32 # could be xori, or addi with -32 | |
549 | slw r6,r3,r6 # t1 = count > 31 ? 0 : MSW << (32-count) | |
550 | srw r7,r3,r7 # t2 = count < 32 ? 0 : MSW >> (count-32) | |
551 | or r4,r4,r6 # LSW |= t1 | |
552 | srw r3,r3,r5 # MSW = MSW >> count | |
553 | or r4,r4,r7 # LSW |= t2 | |
554 | blr | |
9445aa1a | 555 | EXPORT_SYMBOL(__lshrdi3) |
9994a338 | 556 | |
41b93b23 BB |
557 | /* |
558 | * 64-bit comparison: __cmpdi2(s64 a, s64 b) | |
559 | * Returns 0 if a < b, 1 if a == b, 2 if a > b. | |
560 | */ | |
561 | _GLOBAL(__cmpdi2) | |
562 | cmpw r3,r5 | |
563 | li r3,1 | |
564 | bne 1f | |
565 | cmplw r4,r6 | |
566 | beqlr | |
567 | 1: li r3,0 | |
568 | bltlr | |
569 | li r3,2 | |
570 | blr | |
9445aa1a | 571 | EXPORT_SYMBOL(__cmpdi2) |
95ff54f5 PM |
572 | /* |
573 | * 64-bit comparison: __ucmpdi2(u64 a, u64 b) | |
574 | * Returns 0 if a < b, 1 if a == b, 2 if a > b. | |
575 | */ | |
576 | _GLOBAL(__ucmpdi2) | |
577 | cmplw r3,r5 | |
578 | li r3,1 | |
579 | bne 1f | |
580 | cmplw r4,r6 | |
581 | beqlr | |
582 | 1: li r3,0 | |
583 | bltlr | |
584 | li r3,2 | |
585 | blr | |
9445aa1a | 586 | EXPORT_SYMBOL(__ucmpdi2) |
95ff54f5 | 587 | |
ca9d7aea DW |
588 | _GLOBAL(__bswapdi2) |
589 | rotlwi r9,r4,8 | |
590 | rotlwi r10,r3,8 | |
591 | rlwimi r9,r4,24,0,7 | |
592 | rlwimi r10,r3,24,0,7 | |
593 | rlwimi r9,r4,24,16,23 | |
594 | rlwimi r10,r3,24,16,23 | |
595 | mr r3,r9 | |
596 | mr r4,r10 | |
597 | blr | |
9445aa1a | 598 | EXPORT_SYMBOL(__bswapdi2) |
ca9d7aea | 599 | |
69e3cea8 BH |
600 | #ifdef CONFIG_SMP |
601 | _GLOBAL(start_secondary_resume) | |
602 | /* Reset stack */ | |
9778b696 | 603 | CURRENT_THREAD_INFO(r1, r1) |
69e3cea8 BH |
604 | addi r1,r1,THREAD_SIZE-STACK_FRAME_OVERHEAD |
605 | li r3,0 | |
6de06f31 | 606 | stw r3,0(r1) /* Zero the stack frame pointer */ |
69e3cea8 BH |
607 | bl start_secondary |
608 | b . | |
609 | #endif /* CONFIG_SMP */ | |
610 | ||
9994a338 PM |
611 | /* |
612 | * This routine is just here to keep GCC happy - sigh... | |
613 | */ | |
614 | _GLOBAL(__main) | |
615 | blr | |
3d1229d6 ME |
616 | |
617 | #ifdef CONFIG_KEXEC | |
618 | /* | |
619 | * Must be relocatable PIC code callable as a C function. | |
620 | */ | |
621 | .globl relocate_new_kernel | |
622 | relocate_new_kernel: | |
623 | /* r3 = page_list */ | |
624 | /* r4 = reboot_code_buffer */ | |
625 | /* r5 = start_address */ | |
626 | ||
b3df895a SAS |
627 | #ifdef CONFIG_FSL_BOOKE |
628 | ||
629 | mr r29, r3 | |
630 | mr r30, r4 | |
631 | mr r31, r5 | |
632 | ||
633 | #define ENTRY_MAPPING_KEXEC_SETUP | |
634 | #include "fsl_booke_entry_mapping.S" | |
635 | #undef ENTRY_MAPPING_KEXEC_SETUP | |
636 | ||
637 | mr r3, r29 | |
638 | mr r4, r30 | |
639 | mr r5, r31 | |
640 | ||
674bfa48 | 641 | li r0, 0 |
68343020 | 642 | #elif defined(CONFIG_44x) |
674bfa48 | 643 | |
68343020 SP |
644 | /* Save our parameters */ |
645 | mr r29, r3 | |
646 | mr r30, r4 | |
647 | mr r31, r5 | |
648 | ||
649 | #ifdef CONFIG_PPC_47x | |
650 | /* Check for 47x cores */ | |
651 | mfspr r3,SPRN_PVR | |
652 | srwi r3,r3,16 | |
4450022b AP |
653 | cmplwi cr0,r3,PVR_476FPE@h |
654 | beq setup_map_47x | |
68343020 SP |
655 | cmplwi cr0,r3,PVR_476@h |
656 | beq setup_map_47x | |
657 | cmplwi cr0,r3,PVR_476_ISS@h | |
658 | beq setup_map_47x | |
659 | #endif /* CONFIG_PPC_47x */ | |
660 | ||
674bfa48 SP |
661 | /* |
662 | * Code for setting up 1:1 mapping for PPC440x for KEXEC | |
663 | * | |
664 | * We cannot switch off the MMU on PPC44x. | |
665 | * So we: | |
666 | * 1) Invalidate all the mappings except the one we are running from. | |
667 | * 2) Create a tmp mapping for our code in the other address space(TS) and | |
668 | * jump to it. Invalidate the entry we started in. | |
669 | * 3) Create a 1:1 mapping for 0-2GiB in chunks of 256M in original TS. | |
670 | * 4) Jump to the 1:1 mapping in original TS. | |
671 | * 5) Invalidate the tmp mapping. | |
672 | * | |
673 | * - Based on the kexec support code for FSL BookE | |
674bfa48 SP |
674 | * |
675 | */ | |
674bfa48 | 676 | |
f13bfcc6 SP |
677 | /* |
678 | * Load the PID with kernel PID (0). | |
679 | * Also load our MSR_IS and TID to MMUCR for TLB search. | |
680 | */ | |
681 | li r3, 0 | |
682 | mtspr SPRN_PID, r3 | |
674bfa48 SP |
683 | mfmsr r4 |
684 | andi. r4,r4,MSR_IS@l | |
685 | beq wmmucr | |
686 | oris r3,r3,PPC44x_MMUCR_STS@h | |
687 | wmmucr: | |
688 | mtspr SPRN_MMUCR,r3 | |
689 | sync | |
690 | ||
691 | /* | |
692 | * Invalidate all the TLB entries except the current entry | |
693 | * where we are running from | |
694 | */ | |
695 | bl 0f /* Find our address */ | |
696 | 0: mflr r5 /* Make it accessible */ | |
697 | tlbsx r23,0,r5 /* Find entry we are in */ | |
698 | li r4,0 /* Start at TLB entry 0 */ | |
699 | li r3,0 /* Set PAGEID inval value */ | |
700 | 1: cmpw r23,r4 /* Is this our entry? */ | |
701 | beq skip /* If so, skip the inval */ | |
702 | tlbwe r3,r4,PPC44x_TLB_PAGEID /* If not, inval the entry */ | |
703 | skip: | |
704 | addi r4,r4,1 /* Increment */ | |
705 | cmpwi r4,64 /* Are we done? */ | |
706 | bne 1b /* If not, repeat */ | |
707 | isync | |
708 | ||
709 | /* Create a temp mapping and jump to it */ | |
710 | andi. r6, r23, 1 /* Find the index to use */ | |
711 | addi r24, r6, 1 /* r24 will contain 1 or 2 */ | |
712 | ||
713 | mfmsr r9 /* get the MSR */ | |
714 | rlwinm r5, r9, 27, 31, 31 /* Extract the MSR[IS] */ | |
715 | xori r7, r5, 1 /* Use the other address space */ | |
716 | ||
717 | /* Read the current mapping entries */ | |
718 | tlbre r3, r23, PPC44x_TLB_PAGEID | |
719 | tlbre r4, r23, PPC44x_TLB_XLAT | |
720 | tlbre r5, r23, PPC44x_TLB_ATTRIB | |
721 | ||
722 | /* Save our current XLAT entry */ | |
723 | mr r25, r4 | |
724 | ||
725 | /* Extract the TLB PageSize */ | |
726 | li r10, 1 /* r10 will hold PageSize */ | |
727 | rlwinm r11, r3, 0, 24, 27 /* bits 24-27 */ | |
728 | ||
729 | /* XXX: As of now we use 256M, 4K pages */ | |
730 | cmpwi r11, PPC44x_TLB_256M | |
731 | bne tlb_4k | |
732 | rotlwi r10, r10, 28 /* r10 = 256M */ | |
733 | b write_out | |
734 | tlb_4k: | |
735 | cmpwi r11, PPC44x_TLB_4K | |
736 | bne default | |
737 | rotlwi r10, r10, 12 /* r10 = 4K */ | |
738 | b write_out | |
739 | default: | |
740 | rotlwi r10, r10, 10 /* r10 = 1K */ | |
741 | ||
742 | write_out: | |
743 | /* | |
744 | * Write out the tmp 1:1 mapping for this code in other address space | |
745 | * Fixup EPN = RPN , TS=other address space | |
746 | */ | |
747 | insrwi r3, r7, 1, 23 /* Bit 23 is TS for PAGEID field */ | |
748 | ||
749 | /* Write out the tmp mapping entries */ | |
750 | tlbwe r3, r24, PPC44x_TLB_PAGEID | |
751 | tlbwe r4, r24, PPC44x_TLB_XLAT | |
752 | tlbwe r5, r24, PPC44x_TLB_ATTRIB | |
753 | ||
754 | subi r11, r10, 1 /* PageOffset Mask = PageSize - 1 */ | |
755 | not r10, r11 /* Mask for PageNum */ | |
756 | ||
757 | /* Switch to other address space in MSR */ | |
758 | insrwi r9, r7, 1, 26 /* Set MSR[IS] = r7 */ | |
759 | ||
760 | bl 1f | |
761 | 1: mflr r8 | |
762 | addi r8, r8, (2f-1b) /* Find the target offset */ | |
763 | ||
764 | /* Jump to the tmp mapping */ | |
765 | mtspr SPRN_SRR0, r8 | |
766 | mtspr SPRN_SRR1, r9 | |
767 | rfi | |
768 | ||
769 | 2: | |
770 | /* Invalidate the entry we were executing from */ | |
771 | li r3, 0 | |
772 | tlbwe r3, r23, PPC44x_TLB_PAGEID | |
773 | ||
774 | /* attribute fields. rwx for SUPERVISOR mode */ | |
775 | li r5, 0 | |
776 | ori r5, r5, (PPC44x_TLB_SW | PPC44x_TLB_SR | PPC44x_TLB_SX | PPC44x_TLB_G) | |
777 | ||
778 | /* Create 1:1 mapping in 256M pages */ | |
779 | xori r7, r7, 1 /* Revert back to Original TS */ | |
780 | ||
781 | li r8, 0 /* PageNumber */ | |
782 | li r6, 3 /* TLB Index, start at 3 */ | |
783 | ||
784 | next_tlb: | |
785 | rotlwi r3, r8, 28 /* Create EPN (bits 0-3) */ | |
786 | mr r4, r3 /* RPN = EPN */ | |
787 | ori r3, r3, (PPC44x_TLB_VALID | PPC44x_TLB_256M) /* SIZE = 256M, Valid */ | |
788 | insrwi r3, r7, 1, 23 /* Set TS from r7 */ | |
789 | ||
790 | tlbwe r3, r6, PPC44x_TLB_PAGEID /* PageID field : EPN, V, SIZE */ | |
791 | tlbwe r4, r6, PPC44x_TLB_XLAT /* Address translation : RPN */ | |
792 | tlbwe r5, r6, PPC44x_TLB_ATTRIB /* Attributes */ | |
793 | ||
794 | addi r8, r8, 1 /* Increment PN */ | |
795 | addi r6, r6, 1 /* Increment TLB Index */ | |
796 | cmpwi r8, 8 /* Are we done ? */ | |
797 | bne next_tlb | |
798 | isync | |
799 | ||
800 | /* Jump to the new mapping 1:1 */ | |
801 | li r9,0 | |
802 | insrwi r9, r7, 1, 26 /* Set MSR[IS] = r7 */ | |
803 | ||
804 | bl 1f | |
805 | 1: mflr r8 | |
806 | and r8, r8, r11 /* Get our offset within page */ | |
807 | addi r8, r8, (2f-1b) | |
808 | ||
809 | and r5, r25, r10 /* Get our target PageNum */ | |
810 | or r8, r8, r5 /* Target jump address */ | |
811 | ||
812 | mtspr SPRN_SRR0, r8 | |
813 | mtspr SPRN_SRR1, r9 | |
814 | rfi | |
815 | 2: | |
816 | /* Invalidate the tmp entry we used */ | |
817 | li r3, 0 | |
818 | tlbwe r3, r24, PPC44x_TLB_PAGEID | |
819 | sync | |
68343020 SP |
820 | b ppc44x_map_done |
821 | ||
822 | #ifdef CONFIG_PPC_47x | |
823 | ||
824 | /* 1:1 mapping for 47x */ | |
825 | ||
826 | setup_map_47x: | |
827 | ||
828 | /* | |
829 | * Load the kernel pid (0) to PID and also to MMUCR[TID]. | |
830 | * Also set the MSR IS->MMUCR STS | |
831 | */ | |
832 | li r3, 0 | |
833 | mtspr SPRN_PID, r3 /* Set PID */ | |
834 | mfmsr r4 /* Get MSR */ | |
835 | andi. r4, r4, MSR_IS@l /* TS=1? */ | |
836 | beq 1f /* If not, leave STS=0 */ | |
837 | oris r3, r3, PPC47x_MMUCR_STS@h /* Set STS=1 */ | |
838 | 1: mtspr SPRN_MMUCR, r3 /* Put MMUCR */ | |
839 | sync | |
840 | ||
841 | /* Find the entry we are running from */ | |
842 | bl 2f | |
843 | 2: mflr r23 | |
844 | tlbsx r23, 0, r23 | |
845 | tlbre r24, r23, 0 /* TLB Word 0 */ | |
846 | tlbre r25, r23, 1 /* TLB Word 1 */ | |
847 | tlbre r26, r23, 2 /* TLB Word 2 */ | |
848 | ||
849 | ||
850 | /* | |
851 | * Invalidates all the tlb entries by writing to 256 RPNs(r4) | |
852 | * of 4k page size in all 4 ways (0-3 in r3). | |
853 | * This would invalidate the entire UTLB including the one we are | |
854 | * running from. However the shadow TLB entries would help us | |
855 | * to continue the execution, until we flush them (rfi/isync). | |
856 | */ | |
857 | addis r3, 0, 0x8000 /* specify the way */ | |
858 | addi r4, 0, 0 /* TLB Word0 = (EPN=0, VALID = 0) */ | |
859 | addi r5, 0, 0 | |
860 | b clear_utlb_entry | |
861 | ||
862 | /* Align the loop to speed things up. from head_44x.S */ | |
863 | .align 6 | |
864 | ||
865 | clear_utlb_entry: | |
866 | ||
867 | tlbwe r4, r3, 0 | |
868 | tlbwe r5, r3, 1 | |
869 | tlbwe r5, r3, 2 | |
870 | addis r3, r3, 0x2000 /* Increment the way */ | |
871 | cmpwi r3, 0 | |
872 | bne clear_utlb_entry | |
873 | addis r3, 0, 0x8000 | |
874 | addis r4, r4, 0x100 /* Increment the EPN */ | |
875 | cmpwi r4, 0 | |
876 | bne clear_utlb_entry | |
877 | ||
878 | /* Create the entries in the other address space */ | |
879 | mfmsr r5 | |
880 | rlwinm r7, r5, 27, 31, 31 /* Get the TS (Bit 26) from MSR */ | |
881 | xori r7, r7, 1 /* r7 = !TS */ | |
882 | ||
883 | insrwi r24, r7, 1, 21 /* Change the TS in the saved TLB word 0 */ | |
884 | ||
885 | /* | |
886 | * write out the TLB entries for the tmp mapping | |
887 | * Use way '0' so that we could easily invalidate it later. | |
888 | */ | |
889 | lis r3, 0x8000 /* Way '0' */ | |
890 | ||
891 | tlbwe r24, r3, 0 | |
892 | tlbwe r25, r3, 1 | |
893 | tlbwe r26, r3, 2 | |
894 | ||
895 | /* Update the msr to the new TS */ | |
896 | insrwi r5, r7, 1, 26 | |
897 | ||
898 | bl 1f | |
899 | 1: mflr r6 | |
900 | addi r6, r6, (2f-1b) | |
901 | ||
902 | mtspr SPRN_SRR0, r6 | |
903 | mtspr SPRN_SRR1, r5 | |
904 | rfi | |
905 | ||
906 | /* | |
907 | * Now we are in the tmp address space. | |
908 | * Create a 1:1 mapping for 0-2GiB in the original TS. | |
909 | */ | |
910 | 2: | |
911 | li r3, 0 | |
912 | li r4, 0 /* TLB Word 0 */ | |
913 | li r5, 0 /* TLB Word 1 */ | |
914 | li r6, 0 | |
915 | ori r6, r6, PPC47x_TLB2_S_RWX /* TLB word 2 */ | |
916 | ||
917 | li r8, 0 /* PageIndex */ | |
918 | ||
919 | xori r7, r7, 1 /* revert back to original TS */ | |
920 | ||
921 | write_utlb: | |
922 | rotlwi r5, r8, 28 /* RPN = PageIndex * 256M */ | |
923 | /* ERPN = 0 as we don't use memory above 2G */ | |
924 | ||
925 | mr r4, r5 /* EPN = RPN */ | |
926 | ori r4, r4, (PPC47x_TLB0_VALID | PPC47x_TLB0_256M) | |
927 | insrwi r4, r7, 1, 21 /* Insert the TS to Word 0 */ | |
928 | ||
929 | tlbwe r4, r3, 0 /* Write out the entries */ | |
930 | tlbwe r5, r3, 1 | |
931 | tlbwe r6, r3, 2 | |
932 | addi r8, r8, 1 | |
933 | cmpwi r8, 8 /* Have we completed ? */ | |
934 | bne write_utlb | |
935 | ||
936 | /* make sure we complete the TLB write up */ | |
937 | isync | |
938 | ||
939 | /* | |
940 | * Prepare to jump to the 1:1 mapping. | |
941 | * 1) Extract page size of the tmp mapping | |
942 | * DSIZ = TLB_Word0[22:27] | |
943 | * 2) Calculate the physical address of the address | |
944 | * to jump to. | |
945 | */ | |
946 | rlwinm r10, r24, 0, 22, 27 | |
947 | ||
948 | cmpwi r10, PPC47x_TLB0_4K | |
949 | bne 0f | |
950 | li r10, 0x1000 /* r10 = 4k */ | |
951 | bl 1f | |
952 | ||
953 | 0: | |
954 | /* Defaults to 256M */ | |
955 | lis r10, 0x1000 | |
956 | ||
957 | bl 1f | |
958 | 1: mflr r4 | |
959 | addi r4, r4, (2f-1b) /* virtual address of 2f */ | |
960 | ||
961 | subi r11, r10, 1 /* offsetmask = Pagesize - 1 */ | |
962 | not r10, r11 /* Pagemask = ~(offsetmask) */ | |
963 | ||
964 | and r5, r25, r10 /* Physical page */ | |
965 | and r6, r4, r11 /* offset within the current page */ | |
966 | ||
967 | or r5, r5, r6 /* Physical address for 2f */ | |
968 | ||
969 | /* Switch the TS in MSR to the original one */ | |
970 | mfmsr r8 | |
971 | insrwi r8, r7, 1, 26 | |
972 | ||
973 | mtspr SPRN_SRR1, r8 | |
974 | mtspr SPRN_SRR0, r5 | |
975 | rfi | |
976 | ||
977 | 2: | |
978 | /* Invalidate the tmp mapping */ | |
979 | lis r3, 0x8000 /* Way '0' */ | |
980 | ||
981 | clrrwi r24, r24, 12 /* Clear the valid bit */ | |
982 | tlbwe r24, r3, 0 | |
983 | tlbwe r25, r3, 1 | |
984 | tlbwe r26, r3, 2 | |
985 | ||
986 | /* Make sure we complete the TLB write and flush the shadow TLB */ | |
987 | isync | |
988 | ||
989 | #endif | |
990 | ||
991 | ppc44x_map_done: | |
992 | ||
674bfa48 SP |
993 | |
994 | /* Restore the parameters */ | |
995 | mr r3, r29 | |
996 | mr r4, r30 | |
997 | mr r5, r31 | |
998 | ||
b3df895a SAS |
999 | li r0, 0 |
1000 | #else | |
3d1229d6 ME |
1001 | li r0, 0 |
1002 | ||
1003 | /* | |
1004 | * Set Machine Status Register to a known status, | |
1005 | * switch the MMU off and jump to 1: in a single step. | |
1006 | */ | |
1007 | ||
1008 | mr r8, r0 | |
1009 | ori r8, r8, MSR_RI|MSR_ME | |
1010 | mtspr SPRN_SRR1, r8 | |
1011 | addi r8, r4, 1f - relocate_new_kernel | |
1012 | mtspr SPRN_SRR0, r8 | |
1013 | sync | |
1014 | rfi | |
1015 | ||
1016 | 1: | |
b3df895a | 1017 | #endif |
3d1229d6 ME |
1018 | /* from this point address translation is turned off */ |
1019 | /* and interrupts are disabled */ | |
1020 | ||
1021 | /* set a new stack at the bottom of our page... */ | |
1022 | /* (not really needed now) */ | |
d9178f4c | 1023 | addi r1, r4, KEXEC_CONTROL_PAGE_SIZE - 8 /* for LR Save+Back Chain */ |
3d1229d6 ME |
1024 | stw r0, 0(r1) |
1025 | ||
1026 | /* Do the copies */ | |
1027 | li r6, 0 /* checksum */ | |
1028 | mr r0, r3 | |
1029 | b 1f | |
1030 | ||
1031 | 0: /* top, read another word for the indirection page */ | |
1032 | lwzu r0, 4(r3) | |
1033 | ||
1034 | 1: | |
1035 | /* is it a destination page? (r8) */ | |
1036 | rlwinm. r7, r0, 0, 31, 31 /* IND_DESTINATION (1<<0) */ | |
1037 | beq 2f | |
1038 | ||
1039 | rlwinm r8, r0, 0, 0, 19 /* clear kexec flags, page align */ | |
1040 | b 0b | |
1041 | ||
1042 | 2: /* is it an indirection page? (r3) */ | |
1043 | rlwinm. r7, r0, 0, 30, 30 /* IND_INDIRECTION (1<<1) */ | |
1044 | beq 2f | |
1045 | ||
1046 | rlwinm r3, r0, 0, 0, 19 /* clear kexec flags, page align */ | |
1047 | subi r3, r3, 4 | |
1048 | b 0b | |
1049 | ||
1050 | 2: /* are we done? */ | |
1051 | rlwinm. r7, r0, 0, 29, 29 /* IND_DONE (1<<2) */ | |
1052 | beq 2f | |
1053 | b 3f | |
1054 | ||
1055 | 2: /* is it a source page? (r9) */ | |
1056 | rlwinm. r7, r0, 0, 28, 28 /* IND_SOURCE (1<<3) */ | |
1057 | beq 0b | |
1058 | ||
1059 | rlwinm r9, r0, 0, 0, 19 /* clear kexec flags, page align */ | |
1060 | ||
1061 | li r7, PAGE_SIZE / 4 | |
1062 | mtctr r7 | |
1063 | subi r9, r9, 4 | |
1064 | subi r8, r8, 4 | |
1065 | 9: | |
1066 | lwzu r0, 4(r9) /* do the copy */ | |
1067 | xor r6, r6, r0 | |
1068 | stwu r0, 4(r8) | |
1069 | dcbst 0, r8 | |
1070 | sync | |
1071 | icbi 0, r8 | |
1072 | bdnz 9b | |
1073 | ||
1074 | addi r9, r9, 4 | |
1075 | addi r8, r8, 4 | |
1076 | b 0b | |
1077 | ||
1078 | 3: | |
1079 | ||
1080 | /* To be certain of avoiding problems with self-modifying code | |
1081 | * execute a serializing instruction here. | |
1082 | */ | |
1083 | isync | |
1084 | sync | |
1085 | ||
4562c986 MM |
1086 | mfspr r3, SPRN_PIR /* current core we are running on */ |
1087 | mr r4, r5 /* load physical address of chunk called */ | |
1088 | ||
3d1229d6 ME |
1089 | /* jump to the entry point, usually the setup routine */ |
1090 | mtlr r5 | |
1091 | blrl | |
1092 | ||
1093 | 1: b 1b | |
1094 | ||
1095 | relocate_new_kernel_end: | |
1096 | ||
1097 | .globl relocate_new_kernel_size | |
1098 | relocate_new_kernel_size: | |
1099 | .long relocate_new_kernel_end - relocate_new_kernel | |
1100 | #endif |