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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/mm/proc-xscale.S | |
3 | * | |
4 | * Author: Nicolas Pitre | |
5 | * Created: November 2000 | |
6 | * Copyright: (C) 2000, 2001 MontaVista Software Inc. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * MMU functions for the Intel XScale CPUs | |
13 | * | |
14 | * 2001 Aug 21: | |
15 | * some contributions by Brett Gaines <brett.w.gaines@intel.com> | |
16 | * Copyright 2001 by Intel Corp. | |
17 | * | |
18 | * 2001 Sep 08: | |
19 | * Completely revisited, many important fixes | |
2f82af08 | 20 | * Nicolas Pitre <nico@fluxnic.net> |
1da177e4 LT |
21 | */ |
22 | ||
23 | #include <linux/linkage.h> | |
24 | #include <linux/init.h> | |
25 | #include <asm/assembler.h> | |
5ec9407d | 26 | #include <asm/hwcap.h> |
1da177e4 | 27 | #include <asm/pgtable.h> |
0003cedf | 28 | #include <asm/pgtable-hwdef.h> |
1da177e4 LT |
29 | #include <asm/page.h> |
30 | #include <asm/ptrace.h> | |
31 | #include "proc-macros.S" | |
32 | ||
33 | /* | |
34 | * This is the maximum size of an area which will be flushed. If the area | |
35 | * is larger than this, then we flush the whole cache | |
36 | */ | |
37 | #define MAX_AREA_SIZE 32768 | |
38 | ||
39 | /* | |
40 | * the cache line size of the I and D cache | |
41 | */ | |
42 | #define CACHELINESIZE 32 | |
43 | ||
44 | /* | |
45 | * the size of the data cache | |
46 | */ | |
47 | #define CACHESIZE 32768 | |
48 | ||
49 | /* | |
50 | * Virtual address used to allocate the cache when flushed | |
51 | * | |
52 | * This must be an address range which is _never_ used. It should | |
53 | * apparently have a mapping in the corresponding page table for | |
54 | * compatibility with future CPUs that _could_ require it. For instance we | |
55 | * don't care. | |
56 | * | |
57 | * This must be aligned on a 2*CACHESIZE boundary. The code selects one of | |
58 | * the 2 areas in alternance each time the clean_d_cache macro is used. | |
59 | * Without this the XScale core exhibits cache eviction problems and no one | |
60 | * knows why. | |
61 | * | |
62 | * Reminder: the vector table is located at 0xffff0000-0xffff0fff. | |
63 | */ | |
64 | #define CLEAN_ADDR 0xfffe0000 | |
65 | ||
66 | /* | |
67 | * This macro is used to wait for a CP15 write and is needed | |
68 | * when we have to ensure that the last operation to the co-pro | |
69 | * was completed before continuing with operation. | |
70 | */ | |
71 | .macro cpwait, rd | |
72 | mrc p15, 0, \rd, c2, c0, 0 @ arbitrary read of cp15 | |
73 | mov \rd, \rd @ wait for completion | |
74 | sub pc, pc, #4 @ flush instruction pipeline | |
75 | .endm | |
76 | ||
77 | .macro cpwait_ret, lr, rd | |
78 | mrc p15, 0, \rd, c2, c0, 0 @ arbitrary read of cp15 | |
79 | sub pc, \lr, \rd, LSR #32 @ wait for completion and | |
80 | @ flush instruction pipeline | |
81 | .endm | |
82 | ||
83 | /* | |
84 | * This macro cleans the entire dcache using line allocate. | |
85 | * The main loop has been unrolled to reduce loop overhead. | |
86 | * rd and rs are two scratch registers. | |
87 | */ | |
88 | .macro clean_d_cache, rd, rs | |
89 | ldr \rs, =clean_addr | |
90 | ldr \rd, [\rs] | |
91 | eor \rd, \rd, #CACHESIZE | |
92 | str \rd, [\rs] | |
93 | add \rs, \rd, #CACHESIZE | |
94 | 1: mcr p15, 0, \rd, c7, c2, 5 @ allocate D cache line | |
95 | add \rd, \rd, #CACHELINESIZE | |
96 | mcr p15, 0, \rd, c7, c2, 5 @ allocate D cache line | |
97 | add \rd, \rd, #CACHELINESIZE | |
98 | mcr p15, 0, \rd, c7, c2, 5 @ allocate D cache line | |
99 | add \rd, \rd, #CACHELINESIZE | |
100 | mcr p15, 0, \rd, c7, c2, 5 @ allocate D cache line | |
101 | add \rd, \rd, #CACHELINESIZE | |
102 | teq \rd, \rs | |
103 | bne 1b | |
104 | .endm | |
105 | ||
106 | .data | |
107 | clean_addr: .word CLEAN_ADDR | |
108 | ||
109 | .text | |
110 | ||
111 | /* | |
112 | * cpu_xscale_proc_init() | |
113 | * | |
114 | * Nothing too exciting at the moment | |
115 | */ | |
116 | ENTRY(cpu_xscale_proc_init) | |
391c569d AP |
117 | @ enable write buffer coalescing. Some bootloader disable it |
118 | mrc p15, 0, r1, c1, c0, 1 | |
119 | bic r1, r1, #1 | |
120 | mcr p15, 0, r1, c1, c0, 1 | |
1da177e4 LT |
121 | mov pc, lr |
122 | ||
123 | /* | |
124 | * cpu_xscale_proc_fin() | |
125 | */ | |
126 | ENTRY(cpu_xscale_proc_fin) | |
1da177e4 LT |
127 | mrc p15, 0, r0, c1, c0, 0 @ ctrl register |
128 | bic r0, r0, #0x1800 @ ...IZ........... | |
129 | bic r0, r0, #0x0006 @ .............CA. | |
130 | mcr p15, 0, r0, c1, c0, 0 @ disable caches | |
9ca03a21 | 131 | mov pc, lr |
1da177e4 LT |
132 | |
133 | /* | |
134 | * cpu_xscale_reset(loc) | |
135 | * | |
136 | * Perform a soft reset of the system. Put the CPU into the | |
137 | * same state as it would be if it had been reset, and branch | |
138 | * to what would be the reset vector. | |
139 | * | |
140 | * loc: location to jump to for soft reset | |
2dc7667b NP |
141 | * |
142 | * Beware PXA270 erratum E7. | |
1da177e4 LT |
143 | */ |
144 | .align 5 | |
145 | ENTRY(cpu_xscale_reset) | |
146 | mov r1, #PSR_F_BIT|PSR_I_BIT|SVC_MODE | |
147 | msr cpsr_c, r1 @ reset CPSR | |
2dc7667b NP |
148 | mcr p15, 0, r1, c10, c4, 1 @ unlock I-TLB |
149 | mcr p15, 0, r1, c8, c5, 0 @ invalidate I-TLB | |
1da177e4 LT |
150 | mrc p15, 0, r1, c1, c0, 0 @ ctrl register |
151 | bic r1, r1, #0x0086 @ ........B....CA. | |
152 | bic r1, r1, #0x3900 @ ..VIZ..S........ | |
2dc7667b NP |
153 | sub pc, pc, #4 @ flush pipeline |
154 | @ *** cache line aligned *** | |
1da177e4 | 155 | mcr p15, 0, r1, c1, c0, 0 @ ctrl register |
1da177e4 | 156 | bic r1, r1, #0x0001 @ ...............M |
2dc7667b | 157 | mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches & BTB |
1da177e4 LT |
158 | mcr p15, 0, r1, c1, c0, 0 @ ctrl register |
159 | @ CAUTION: MMU turned off from this point. We count on the pipeline | |
160 | @ already containing those two last instructions to survive. | |
161 | mcr p15, 0, ip, c8, c7, 0 @ invalidate I & D TLBs | |
162 | mov pc, r0 | |
163 | ||
164 | /* | |
165 | * cpu_xscale_do_idle() | |
166 | * | |
167 | * Cause the processor to idle | |
168 | * | |
169 | * For now we do nothing but go to idle mode for every case | |
170 | * | |
171 | * XScale supports clock switching, but using idle mode support | |
172 | * allows external hardware to react to system state changes. | |
173 | */ | |
174 | .align 5 | |
175 | ||
176 | ENTRY(cpu_xscale_do_idle) | |
177 | mov r0, #1 | |
178 | mcr p14, 0, r0, c7, c0, 0 @ Go to IDLE | |
179 | mov pc, lr | |
180 | ||
181 | /* ================================= CACHE ================================ */ | |
182 | ||
183 | /* | |
184 | * flush_user_cache_all() | |
185 | * | |
186 | * Invalidate all cache entries in a particular address | |
187 | * space. | |
188 | */ | |
189 | ENTRY(xscale_flush_user_cache_all) | |
190 | /* FALLTHROUGH */ | |
191 | ||
192 | /* | |
193 | * flush_kern_cache_all() | |
194 | * | |
195 | * Clean and invalidate the entire cache. | |
196 | */ | |
197 | ENTRY(xscale_flush_kern_cache_all) | |
198 | mov r2, #VM_EXEC | |
199 | mov ip, #0 | |
200 | __flush_whole_cache: | |
201 | clean_d_cache r0, r1 | |
202 | tst r2, #VM_EXEC | |
203 | mcrne p15, 0, ip, c7, c5, 0 @ Invalidate I cache & BTB | |
204 | mcrne p15, 0, ip, c7, c10, 4 @ Drain Write (& Fill) Buffer | |
205 | mov pc, lr | |
206 | ||
207 | /* | |
208 | * flush_user_cache_range(start, end, vm_flags) | |
209 | * | |
210 | * Invalidate a range of cache entries in the specified | |
211 | * address space. | |
212 | * | |
213 | * - start - start address (may not be aligned) | |
214 | * - end - end address (exclusive, may not be aligned) | |
215 | * - vma - vma_area_struct describing address space | |
216 | */ | |
217 | .align 5 | |
218 | ENTRY(xscale_flush_user_cache_range) | |
219 | mov ip, #0 | |
220 | sub r3, r1, r0 @ calculate total size | |
221 | cmp r3, #MAX_AREA_SIZE | |
222 | bhs __flush_whole_cache | |
223 | ||
224 | 1: tst r2, #VM_EXEC | |
225 | mcrne p15, 0, r0, c7, c5, 1 @ Invalidate I cache line | |
226 | mcr p15, 0, r0, c7, c10, 1 @ Clean D cache line | |
227 | mcr p15, 0, r0, c7, c6, 1 @ Invalidate D cache line | |
228 | add r0, r0, #CACHELINESIZE | |
229 | cmp r0, r1 | |
230 | blo 1b | |
231 | tst r2, #VM_EXEC | |
232 | mcrne p15, 0, ip, c7, c5, 6 @ Invalidate BTB | |
233 | mcrne p15, 0, ip, c7, c10, 4 @ Drain Write (& Fill) Buffer | |
234 | mov pc, lr | |
235 | ||
236 | /* | |
237 | * coherent_kern_range(start, end) | |
238 | * | |
239 | * Ensure coherency between the Icache and the Dcache in the | |
240 | * region described by start. If you have non-snooping | |
241 | * Harvard caches, you need to implement this function. | |
242 | * | |
243 | * - start - virtual start address | |
244 | * - end - virtual end address | |
245 | * | |
246 | * Note: single I-cache line invalidation isn't used here since | |
247 | * it also trashes the mini I-cache used by JTAG debuggers. | |
248 | */ | |
249 | ENTRY(xscale_coherent_kern_range) | |
8a052e0b NP |
250 | bic r0, r0, #CACHELINESIZE - 1 |
251 | 1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry | |
252 | add r0, r0, #CACHELINESIZE | |
253 | cmp r0, r1 | |
254 | blo 1b | |
255 | mov r0, #0 | |
256 | mcr p15, 0, r0, c7, c5, 0 @ Invalidate I cache & BTB | |
257 | mcr p15, 0, r0, c7, c10, 4 @ Drain Write (& Fill) Buffer | |
258 | mov pc, lr | |
1da177e4 LT |
259 | |
260 | /* | |
261 | * coherent_user_range(start, end) | |
262 | * | |
263 | * Ensure coherency between the Icache and the Dcache in the | |
264 | * region described by start. If you have non-snooping | |
265 | * Harvard caches, you need to implement this function. | |
266 | * | |
267 | * - start - virtual start address | |
268 | * - end - virtual end address | |
1da177e4 LT |
269 | */ |
270 | ENTRY(xscale_coherent_user_range) | |
271 | bic r0, r0, #CACHELINESIZE - 1 | |
272 | 1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry | |
8a052e0b | 273 | mcr p15, 0, r0, c7, c5, 1 @ Invalidate I cache entry |
1da177e4 LT |
274 | add r0, r0, #CACHELINESIZE |
275 | cmp r0, r1 | |
276 | blo 1b | |
277 | mov r0, #0 | |
8a052e0b | 278 | mcr p15, 0, r0, c7, c5, 6 @ Invalidate BTB |
1da177e4 LT |
279 | mcr p15, 0, r0, c7, c10, 4 @ Drain Write (& Fill) Buffer |
280 | mov pc, lr | |
281 | ||
282 | /* | |
2c9b9c84 | 283 | * flush_kern_dcache_area(void *addr, size_t size) |
1da177e4 LT |
284 | * |
285 | * Ensure no D cache aliasing occurs, either with itself or | |
286 | * the I cache | |
287 | * | |
2c9b9c84 RK |
288 | * - addr - kernel address |
289 | * - size - region size | |
1da177e4 | 290 | */ |
2c9b9c84 RK |
291 | ENTRY(xscale_flush_kern_dcache_area) |
292 | add r1, r0, r1 | |
1da177e4 LT |
293 | 1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry |
294 | mcr p15, 0, r0, c7, c6, 1 @ invalidate D entry | |
295 | add r0, r0, #CACHELINESIZE | |
296 | cmp r0, r1 | |
297 | blo 1b | |
298 | mov r0, #0 | |
299 | mcr p15, 0, r0, c7, c5, 0 @ Invalidate I cache & BTB | |
300 | mcr p15, 0, r0, c7, c10, 4 @ Drain Write (& Fill) Buffer | |
301 | mov pc, lr | |
302 | ||
303 | /* | |
304 | * dma_inv_range(start, end) | |
305 | * | |
306 | * Invalidate (discard) the specified virtual address range. | |
307 | * May not write back any entries. If 'start' or 'end' | |
308 | * are not cache line aligned, those lines must be written | |
309 | * back. | |
310 | * | |
311 | * - start - virtual start address | |
312 | * - end - virtual end address | |
313 | */ | |
702b94bf | 314 | xscale_dma_inv_range: |
1da177e4 LT |
315 | tst r0, #CACHELINESIZE - 1 |
316 | bic r0, r0, #CACHELINESIZE - 1 | |
317 | mcrne p15, 0, r0, c7, c10, 1 @ clean D entry | |
318 | tst r1, #CACHELINESIZE - 1 | |
319 | mcrne p15, 0, r1, c7, c10, 1 @ clean D entry | |
320 | 1: mcr p15, 0, r0, c7, c6, 1 @ invalidate D entry | |
321 | add r0, r0, #CACHELINESIZE | |
322 | cmp r0, r1 | |
323 | blo 1b | |
324 | mcr p15, 0, r0, c7, c10, 4 @ Drain Write (& Fill) Buffer | |
325 | mov pc, lr | |
326 | ||
327 | /* | |
328 | * dma_clean_range(start, end) | |
329 | * | |
330 | * Clean the specified virtual address range. | |
331 | * | |
332 | * - start - virtual start address | |
333 | * - end - virtual end address | |
334 | */ | |
702b94bf | 335 | xscale_dma_clean_range: |
1da177e4 LT |
336 | bic r0, r0, #CACHELINESIZE - 1 |
337 | 1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry | |
338 | add r0, r0, #CACHELINESIZE | |
339 | cmp r0, r1 | |
340 | blo 1b | |
341 | mcr p15, 0, r0, c7, c10, 4 @ Drain Write (& Fill) Buffer | |
342 | mov pc, lr | |
343 | ||
344 | /* | |
345 | * dma_flush_range(start, end) | |
346 | * | |
347 | * Clean and invalidate the specified virtual address range. | |
348 | * | |
349 | * - start - virtual start address | |
350 | * - end - virtual end address | |
351 | */ | |
352 | ENTRY(xscale_dma_flush_range) | |
353 | bic r0, r0, #CACHELINESIZE - 1 | |
354 | 1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry | |
355 | mcr p15, 0, r0, c7, c6, 1 @ invalidate D entry | |
356 | add r0, r0, #CACHELINESIZE | |
357 | cmp r0, r1 | |
358 | blo 1b | |
359 | mcr p15, 0, r0, c7, c10, 4 @ Drain Write (& Fill) Buffer | |
360 | mov pc, lr | |
361 | ||
a9c9147e RK |
362 | /* |
363 | * dma_map_area(start, size, dir) | |
364 | * - start - kernel virtual start address | |
365 | * - size - size of region | |
366 | * - dir - DMA direction | |
367 | */ | |
368 | ENTRY(xscale_dma_map_area) | |
369 | add r1, r1, r0 | |
370 | cmp r2, #DMA_TO_DEVICE | |
371 | beq xscale_dma_clean_range | |
372 | bcs xscale_dma_inv_range | |
373 | b xscale_dma_flush_range | |
374 | ENDPROC(xscale_dma_map_area) | |
375 | ||
376 | /* | |
377 | * dma_map_area(start, size, dir) | |
378 | * - start - kernel virtual start address | |
379 | * - size - size of region | |
380 | * - dir - DMA direction | |
381 | */ | |
382 | ENTRY(xscale_dma_a0_map_area) | |
383 | add r1, r1, r0 | |
384 | teq r2, #DMA_TO_DEVICE | |
385 | beq xscale_dma_clean_range | |
386 | b xscale_dma_flush_range | |
387 | ENDPROC(xscsale_dma_a0_map_area) | |
388 | ||
389 | /* | |
390 | * dma_unmap_area(start, size, dir) | |
391 | * - start - kernel virtual start address | |
392 | * - size - size of region | |
393 | * - dir - DMA direction | |
394 | */ | |
395 | ENTRY(xscale_dma_unmap_area) | |
396 | mov pc, lr | |
397 | ENDPROC(xscale_dma_unmap_area) | |
398 | ||
1da177e4 LT |
399 | ENTRY(xscale_cache_fns) |
400 | .long xscale_flush_kern_cache_all | |
401 | .long xscale_flush_user_cache_all | |
402 | .long xscale_flush_user_cache_range | |
403 | .long xscale_coherent_kern_range | |
404 | .long xscale_coherent_user_range | |
2c9b9c84 | 405 | .long xscale_flush_kern_dcache_area |
a9c9147e RK |
406 | .long xscale_dma_map_area |
407 | .long xscale_dma_unmap_area | |
1da177e4 LT |
408 | .long xscale_dma_flush_range |
409 | ||
197c9444 LB |
410 | /* |
411 | * On stepping A0/A1 of the 80200, invalidating D-cache by line doesn't | |
412 | * clear the dirty bits, which means that if we invalidate a dirty line, | |
413 | * the dirty data can still be written back to external memory later on. | |
414 | * | |
415 | * The recommended workaround is to always do a clean D-cache line before | |
416 | * doing an invalidate D-cache line, so on the affected processors, | |
417 | * dma_inv_range() is implemented as dma_flush_range(). | |
418 | * | |
419 | * See erratum #25 of "Intel 80200 Processor Specification Update", | |
420 | * revision January 22, 2003, available at: | |
421 | * http://www.intel.com/design/iio/specupdt/273415.htm | |
422 | */ | |
423 | ENTRY(xscale_80200_A0_A1_cache_fns) | |
424 | .long xscale_flush_kern_cache_all | |
425 | .long xscale_flush_user_cache_all | |
426 | .long xscale_flush_user_cache_range | |
427 | .long xscale_coherent_kern_range | |
428 | .long xscale_coherent_user_range | |
2c9b9c84 | 429 | .long xscale_flush_kern_dcache_area |
a9c9147e RK |
430 | .long xscale_dma_a0_map_area |
431 | .long xscale_dma_unmap_area | |
197c9444 | 432 | .long xscale_dma_flush_range |
197c9444 | 433 | |
1da177e4 LT |
434 | ENTRY(cpu_xscale_dcache_clean_area) |
435 | 1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry | |
436 | add r0, r0, #CACHELINESIZE | |
437 | subs r1, r1, #CACHELINESIZE | |
438 | bhi 1b | |
439 | mov pc, lr | |
440 | ||
1da177e4 LT |
441 | /* =============================== PageTable ============================== */ |
442 | ||
1da177e4 LT |
443 | /* |
444 | * cpu_xscale_switch_mm(pgd) | |
445 | * | |
446 | * Set the translation base pointer to be as described by pgd. | |
447 | * | |
448 | * pgd: new page tables | |
449 | */ | |
450 | .align 5 | |
451 | ENTRY(cpu_xscale_switch_mm) | |
452 | clean_d_cache r1, r2 | |
453 | mcr p15, 0, ip, c7, c5, 0 @ Invalidate I cache & BTB | |
454 | mcr p15, 0, ip, c7, c10, 4 @ Drain Write (& Fill) Buffer | |
455 | mcr p15, 0, r0, c2, c0, 0 @ load page table pointer | |
456 | mcr p15, 0, ip, c8, c7, 0 @ invalidate I & D TLBs | |
457 | cpwait_ret lr, ip | |
458 | ||
459 | /* | |
ad1ae2fe | 460 | * cpu_xscale_set_pte_ext(ptep, pte, ext) |
1da177e4 LT |
461 | * |
462 | * Set a PTE and flush it out | |
463 | * | |
464 | * Errata 40: must set memory to write-through for user read-only pages. | |
465 | */ | |
9e8b5199 RK |
466 | cpu_xscale_mt_table: |
467 | .long 0x00 @ L_PTE_MT_UNCACHED | |
468 | .long PTE_BUFFERABLE @ L_PTE_MT_BUFFERABLE | |
469 | .long PTE_CACHEABLE @ L_PTE_MT_WRITETHROUGH | |
470 | .long PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_WRITEBACK | |
40df2d1d | 471 | .long PTE_EXT_TEX(1) | PTE_BUFFERABLE @ L_PTE_MT_DEV_SHARED |
639b0ae7 | 472 | .long 0x00 @ unused |
9e8b5199 RK |
473 | .long PTE_EXT_TEX(1) | PTE_CACHEABLE @ L_PTE_MT_MINICACHE |
474 | .long PTE_EXT_TEX(1) | PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_WRITEALLOC | |
639b0ae7 | 475 | .long 0x00 @ unused |
9e8b5199 RK |
476 | .long PTE_BUFFERABLE @ L_PTE_MT_DEV_WC |
477 | .long 0x00 @ unused | |
478 | .long PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_DEV_CACHED | |
479 | .long 0x00 @ L_PTE_MT_DEV_NONSHARED | |
db5b7169 | 480 | .long 0x00 @ unused |
9e8b5199 RK |
481 | .long 0x00 @ unused |
482 | .long 0x00 @ unused | |
483 | ||
1da177e4 | 484 | .align 5 |
ad1ae2fe | 485 | ENTRY(cpu_xscale_set_pte_ext) |
da091653 | 486 | xscale_set_pte_ext_prologue |
1da177e4 LT |
487 | |
488 | @ | |
9e8b5199 | 489 | @ Erratum 40: must set memory to write-through for user read-only pages |
1da177e4 | 490 | @ |
9e8b5199 RK |
491 | and ip, r1, #(L_PTE_MT_MASK | L_PTE_USER | L_PTE_WRITE) & ~(4 << 2) |
492 | teq ip, #L_PTE_MT_WRITEBACK | L_PTE_USER | |
493 | ||
494 | moveq r1, #L_PTE_MT_WRITETHROUGH | |
495 | and r1, r1, #L_PTE_MT_MASK | |
496 | adr ip, cpu_xscale_mt_table | |
497 | ldr ip, [ip, r1] | |
498 | bic r2, r2, #0x0c | |
499 | orr r2, r2, ip | |
1da177e4 | 500 | |
da091653 | 501 | xscale_set_pte_ext_epilogue |
1da177e4 LT |
502 | mov pc, lr |
503 | ||
504 | ||
505 | .ltorg | |
506 | ||
507 | .align | |
508 | ||
509 | __INIT | |
510 | ||
511 | .type __xscale_setup, #function | |
512 | __xscale_setup: | |
513 | mcr p15, 0, ip, c7, c7, 0 @ invalidate I, D caches & BTB | |
514 | mcr p15, 0, ip, c7, c10, 4 @ Drain Write (& Fill) Buffer | |
515 | mcr p15, 0, ip, c8, c7, 0 @ invalidate I, D TLBs | |
afe4b25e | 516 | mov r0, #1 << 6 @ cp6 for IOP3xx and Bulverde |
1da177e4 LT |
517 | orr r0, r0, #1 << 13 @ Its undefined whether this |
518 | mcr p15, 0, r0, c15, c1, 0 @ affects USR or SVC modes | |
22b19086 RK |
519 | |
520 | adr r5, xscale_crval | |
521 | ldmia r5, {r5, r6} | |
1da177e4 | 522 | mrc p15, 0, r0, c1, c0, 0 @ get control register |
1da177e4 | 523 | bic r0, r0, r5 |
22b19086 | 524 | orr r0, r0, r6 |
1da177e4 LT |
525 | mov pc, lr |
526 | .size __xscale_setup, . - __xscale_setup | |
527 | ||
528 | /* | |
529 | * R | |
530 | * .RVI ZFRS BLDP WCAM | |
531 | * ..11 1.01 .... .101 | |
532 | * | |
533 | */ | |
22b19086 RK |
534 | .type xscale_crval, #object |
535 | xscale_crval: | |
536 | crval clear=0x00003b07, mmuset=0x00003905, ucset=0x00001900 | |
1da177e4 LT |
537 | |
538 | __INITDATA | |
539 | ||
540 | /* | |
541 | * Purpose : Function pointers used to access above functions - all calls | |
542 | * come through these | |
543 | */ | |
544 | ||
545 | .type xscale_processor_functions, #object | |
546 | ENTRY(xscale_processor_functions) | |
547 | .word v5t_early_abort | |
4fb28474 | 548 | .word legacy_pabort |
1da177e4 LT |
549 | .word cpu_xscale_proc_init |
550 | .word cpu_xscale_proc_fin | |
551 | .word cpu_xscale_reset | |
552 | .word cpu_xscale_do_idle | |
553 | .word cpu_xscale_dcache_clean_area | |
554 | .word cpu_xscale_switch_mm | |
ad1ae2fe | 555 | .word cpu_xscale_set_pte_ext |
1da177e4 LT |
556 | .size xscale_processor_functions, . - xscale_processor_functions |
557 | ||
558 | .section ".rodata" | |
559 | ||
560 | .type cpu_arch_name, #object | |
561 | cpu_arch_name: | |
562 | .asciz "armv5te" | |
563 | .size cpu_arch_name, . - cpu_arch_name | |
564 | ||
565 | .type cpu_elf_name, #object | |
566 | cpu_elf_name: | |
567 | .asciz "v5" | |
568 | .size cpu_elf_name, . - cpu_elf_name | |
569 | ||
197c9444 LB |
570 | .type cpu_80200_A0_A1_name, #object |
571 | cpu_80200_A0_A1_name: | |
572 | .asciz "XScale-80200 A0/A1" | |
573 | .size cpu_80200_A0_A1_name, . - cpu_80200_A0_A1_name | |
574 | ||
1da177e4 LT |
575 | .type cpu_80200_name, #object |
576 | cpu_80200_name: | |
577 | .asciz "XScale-80200" | |
578 | .size cpu_80200_name, . - cpu_80200_name | |
579 | ||
a6a38a66 LB |
580 | .type cpu_80219_name, #object |
581 | cpu_80219_name: | |
582 | .asciz "XScale-80219" | |
583 | .size cpu_80219_name, . - cpu_80219_name | |
584 | ||
1da177e4 LT |
585 | .type cpu_8032x_name, #object |
586 | cpu_8032x_name: | |
587 | .asciz "XScale-IOP8032x Family" | |
588 | .size cpu_8032x_name, . - cpu_8032x_name | |
589 | ||
590 | .type cpu_8033x_name, #object | |
591 | cpu_8033x_name: | |
592 | .asciz "XScale-IOP8033x Family" | |
593 | .size cpu_8033x_name, . - cpu_8033x_name | |
594 | ||
595 | .type cpu_pxa250_name, #object | |
596 | cpu_pxa250_name: | |
597 | .asciz "XScale-PXA250" | |
598 | .size cpu_pxa250_name, . - cpu_pxa250_name | |
599 | ||
600 | .type cpu_pxa210_name, #object | |
601 | cpu_pxa210_name: | |
602 | .asciz "XScale-PXA210" | |
603 | .size cpu_pxa210_name, . - cpu_pxa210_name | |
604 | ||
605 | .type cpu_ixp42x_name, #object | |
606 | cpu_ixp42x_name: | |
607 | .asciz "XScale-IXP42x Family" | |
608 | .size cpu_ixp42x_name, . - cpu_ixp42x_name | |
609 | ||
45fba084 RS |
610 | .type cpu_ixp43x_name, #object |
611 | cpu_ixp43x_name: | |
612 | .asciz "XScale-IXP43x Family" | |
613 | .size cpu_ixp43x_name, . - cpu_ixp43x_name | |
614 | ||
1da177e4 LT |
615 | .type cpu_ixp46x_name, #object |
616 | cpu_ixp46x_name: | |
617 | .asciz "XScale-IXP46x Family" | |
618 | .size cpu_ixp46x_name, . - cpu_ixp46x_name | |
619 | ||
620 | .type cpu_ixp2400_name, #object | |
621 | cpu_ixp2400_name: | |
622 | .asciz "XScale-IXP2400" | |
623 | .size cpu_ixp2400_name, . - cpu_ixp2400_name | |
624 | ||
625 | .type cpu_ixp2800_name, #object | |
626 | cpu_ixp2800_name: | |
627 | .asciz "XScale-IXP2800" | |
628 | .size cpu_ixp2800_name, . - cpu_ixp2800_name | |
629 | ||
630 | .type cpu_pxa255_name, #object | |
631 | cpu_pxa255_name: | |
632 | .asciz "XScale-PXA255" | |
633 | .size cpu_pxa255_name, . - cpu_pxa255_name | |
634 | ||
635 | .type cpu_pxa270_name, #object | |
636 | cpu_pxa270_name: | |
637 | .asciz "XScale-PXA270" | |
638 | .size cpu_pxa270_name, . - cpu_pxa270_name | |
639 | ||
640 | .align | |
641 | ||
02b7dd12 | 642 | .section ".proc.info.init", #alloc, #execinstr |
1da177e4 | 643 | |
197c9444 LB |
644 | .type __80200_A0_A1_proc_info,#object |
645 | __80200_A0_A1_proc_info: | |
646 | .long 0x69052000 | |
647 | .long 0xfffffffe | |
648 | .long PMD_TYPE_SECT | \ | |
649 | PMD_SECT_BUFFERABLE | \ | |
650 | PMD_SECT_CACHEABLE | \ | |
651 | PMD_SECT_AP_WRITE | \ | |
652 | PMD_SECT_AP_READ | |
653 | .long PMD_TYPE_SECT | \ | |
654 | PMD_SECT_AP_WRITE | \ | |
655 | PMD_SECT_AP_READ | |
656 | b __xscale_setup | |
657 | .long cpu_arch_name | |
658 | .long cpu_elf_name | |
659 | .long HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP | |
660 | .long cpu_80200_name | |
661 | .long xscale_processor_functions | |
662 | .long v4wbi_tlb_fns | |
663 | .long xscale_mc_user_fns | |
664 | .long xscale_80200_A0_A1_cache_fns | |
665 | .size __80200_A0_A1_proc_info, . - __80200_A0_A1_proc_info | |
666 | ||
1da177e4 LT |
667 | .type __80200_proc_info,#object |
668 | __80200_proc_info: | |
669 | .long 0x69052000 | |
670 | .long 0xfffffff0 | |
671 | .long PMD_TYPE_SECT | \ | |
672 | PMD_SECT_BUFFERABLE | \ | |
673 | PMD_SECT_CACHEABLE | \ | |
674 | PMD_SECT_AP_WRITE | \ | |
675 | PMD_SECT_AP_READ | |
8799ee9f RK |
676 | .long PMD_TYPE_SECT | \ |
677 | PMD_SECT_AP_WRITE | \ | |
678 | PMD_SECT_AP_READ | |
1da177e4 LT |
679 | b __xscale_setup |
680 | .long cpu_arch_name | |
681 | .long cpu_elf_name | |
682 | .long HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP | |
683 | .long cpu_80200_name | |
684 | .long xscale_processor_functions | |
685 | .long v4wbi_tlb_fns | |
686 | .long xscale_mc_user_fns | |
687 | .long xscale_cache_fns | |
688 | .size __80200_proc_info, . - __80200_proc_info | |
689 | ||
a6a38a66 LB |
690 | .type __80219_proc_info,#object |
691 | __80219_proc_info: | |
692 | .long 0x69052e20 | |
693 | .long 0xffffffe0 | |
694 | .long PMD_TYPE_SECT | \ | |
695 | PMD_SECT_BUFFERABLE | \ | |
696 | PMD_SECT_CACHEABLE | \ | |
697 | PMD_SECT_AP_WRITE | \ | |
698 | PMD_SECT_AP_READ | |
699 | .long PMD_TYPE_SECT | \ | |
700 | PMD_SECT_AP_WRITE | \ | |
701 | PMD_SECT_AP_READ | |
702 | b __xscale_setup | |
703 | .long cpu_arch_name | |
704 | .long cpu_elf_name | |
705 | .long HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP | |
706 | .long cpu_80219_name | |
707 | .long xscale_processor_functions | |
708 | .long v4wbi_tlb_fns | |
709 | .long xscale_mc_user_fns | |
710 | .long xscale_cache_fns | |
711 | .size __80219_proc_info, . - __80219_proc_info | |
712 | ||
1da177e4 LT |
713 | .type __8032x_proc_info,#object |
714 | __8032x_proc_info: | |
715 | .long 0x69052420 | |
36694a4c | 716 | .long 0xfffff7e0 |
1da177e4 LT |
717 | .long PMD_TYPE_SECT | \ |
718 | PMD_SECT_BUFFERABLE | \ | |
719 | PMD_SECT_CACHEABLE | \ | |
720 | PMD_SECT_AP_WRITE | \ | |
721 | PMD_SECT_AP_READ | |
8799ee9f RK |
722 | .long PMD_TYPE_SECT | \ |
723 | PMD_SECT_AP_WRITE | \ | |
724 | PMD_SECT_AP_READ | |
1da177e4 LT |
725 | b __xscale_setup |
726 | .long cpu_arch_name | |
727 | .long cpu_elf_name | |
728 | .long HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP | |
729 | .long cpu_8032x_name | |
730 | .long xscale_processor_functions | |
731 | .long v4wbi_tlb_fns | |
732 | .long xscale_mc_user_fns | |
733 | .long xscale_cache_fns | |
734 | .size __8032x_proc_info, . - __8032x_proc_info | |
735 | ||
736 | .type __8033x_proc_info,#object | |
737 | __8033x_proc_info: | |
738 | .long 0x69054010 | |
7f215abc | 739 | .long 0xfffffd30 |
1da177e4 LT |
740 | .long PMD_TYPE_SECT | \ |
741 | PMD_SECT_BUFFERABLE | \ | |
742 | PMD_SECT_CACHEABLE | \ | |
743 | PMD_SECT_AP_WRITE | \ | |
744 | PMD_SECT_AP_READ | |
8799ee9f RK |
745 | .long PMD_TYPE_SECT | \ |
746 | PMD_SECT_AP_WRITE | \ | |
747 | PMD_SECT_AP_READ | |
1da177e4 LT |
748 | b __xscale_setup |
749 | .long cpu_arch_name | |
750 | .long cpu_elf_name | |
751 | .long HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP | |
752 | .long cpu_8033x_name | |
753 | .long xscale_processor_functions | |
754 | .long v4wbi_tlb_fns | |
755 | .long xscale_mc_user_fns | |
756 | .long xscale_cache_fns | |
757 | .size __8033x_proc_info, . - __8033x_proc_info | |
758 | ||
759 | .type __pxa250_proc_info,#object | |
760 | __pxa250_proc_info: | |
761 | .long 0x69052100 | |
762 | .long 0xfffff7f0 | |
763 | .long PMD_TYPE_SECT | \ | |
764 | PMD_SECT_BUFFERABLE | \ | |
765 | PMD_SECT_CACHEABLE | \ | |
766 | PMD_SECT_AP_WRITE | \ | |
767 | PMD_SECT_AP_READ | |
8799ee9f RK |
768 | .long PMD_TYPE_SECT | \ |
769 | PMD_SECT_AP_WRITE | \ | |
770 | PMD_SECT_AP_READ | |
1da177e4 LT |
771 | b __xscale_setup |
772 | .long cpu_arch_name | |
773 | .long cpu_elf_name | |
774 | .long HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP | |
775 | .long cpu_pxa250_name | |
776 | .long xscale_processor_functions | |
777 | .long v4wbi_tlb_fns | |
778 | .long xscale_mc_user_fns | |
779 | .long xscale_cache_fns | |
780 | .size __pxa250_proc_info, . - __pxa250_proc_info | |
781 | ||
782 | .type __pxa210_proc_info,#object | |
783 | __pxa210_proc_info: | |
784 | .long 0x69052120 | |
785 | .long 0xfffff3f0 | |
786 | .long PMD_TYPE_SECT | \ | |
787 | PMD_SECT_BUFFERABLE | \ | |
788 | PMD_SECT_CACHEABLE | \ | |
789 | PMD_SECT_AP_WRITE | \ | |
790 | PMD_SECT_AP_READ | |
8799ee9f RK |
791 | .long PMD_TYPE_SECT | \ |
792 | PMD_SECT_AP_WRITE | \ | |
793 | PMD_SECT_AP_READ | |
1da177e4 LT |
794 | b __xscale_setup |
795 | .long cpu_arch_name | |
796 | .long cpu_elf_name | |
797 | .long HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP | |
798 | .long cpu_pxa210_name | |
799 | .long xscale_processor_functions | |
800 | .long v4wbi_tlb_fns | |
801 | .long xscale_mc_user_fns | |
802 | .long xscale_cache_fns | |
803 | .size __pxa210_proc_info, . - __pxa210_proc_info | |
804 | ||
805 | .type __ixp2400_proc_info, #object | |
806 | __ixp2400_proc_info: | |
807 | .long 0x69054190 | |
808 | .long 0xfffffff0 | |
809 | .long PMD_TYPE_SECT | \ | |
810 | PMD_SECT_BUFFERABLE | \ | |
811 | PMD_SECT_CACHEABLE | \ | |
812 | PMD_SECT_AP_WRITE | \ | |
813 | PMD_SECT_AP_READ | |
8799ee9f RK |
814 | .long PMD_TYPE_SECT | \ |
815 | PMD_SECT_AP_WRITE | \ | |
816 | PMD_SECT_AP_READ | |
1da177e4 LT |
817 | b __xscale_setup |
818 | .long cpu_arch_name | |
819 | .long cpu_elf_name | |
820 | .long HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP | |
821 | .long cpu_ixp2400_name | |
822 | .long xscale_processor_functions | |
823 | .long v4wbi_tlb_fns | |
824 | .long xscale_mc_user_fns | |
825 | .long xscale_cache_fns | |
826 | .size __ixp2400_proc_info, . - __ixp2400_proc_info | |
827 | ||
828 | .type __ixp2800_proc_info, #object | |
829 | __ixp2800_proc_info: | |
830 | .long 0x690541a0 | |
831 | .long 0xfffffff0 | |
832 | .long PMD_TYPE_SECT | \ | |
833 | PMD_SECT_BUFFERABLE | \ | |
834 | PMD_SECT_CACHEABLE | \ | |
835 | PMD_SECT_AP_WRITE | \ | |
836 | PMD_SECT_AP_READ | |
8799ee9f RK |
837 | .long PMD_TYPE_SECT | \ |
838 | PMD_SECT_AP_WRITE | \ | |
839 | PMD_SECT_AP_READ | |
1da177e4 LT |
840 | b __xscale_setup |
841 | .long cpu_arch_name | |
842 | .long cpu_elf_name | |
843 | .long HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP | |
844 | .long cpu_ixp2800_name | |
845 | .long xscale_processor_functions | |
846 | .long v4wbi_tlb_fns | |
847 | .long xscale_mc_user_fns | |
848 | .long xscale_cache_fns | |
849 | .size __ixp2800_proc_info, . - __ixp2800_proc_info | |
850 | ||
851 | .type __ixp42x_proc_info, #object | |
852 | __ixp42x_proc_info: | |
853 | .long 0x690541c0 | |
854 | .long 0xffffffc0 | |
855 | .long PMD_TYPE_SECT | \ | |
856 | PMD_SECT_BUFFERABLE | \ | |
857 | PMD_SECT_CACHEABLE | \ | |
858 | PMD_SECT_AP_WRITE | \ | |
859 | PMD_SECT_AP_READ | |
8799ee9f RK |
860 | .long PMD_TYPE_SECT | \ |
861 | PMD_SECT_AP_WRITE | \ | |
862 | PMD_SECT_AP_READ | |
1da177e4 LT |
863 | b __xscale_setup |
864 | .long cpu_arch_name | |
865 | .long cpu_elf_name | |
866 | .long HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP | |
867 | .long cpu_ixp42x_name | |
868 | .long xscale_processor_functions | |
869 | .long v4wbi_tlb_fns | |
870 | .long xscale_mc_user_fns | |
871 | .long xscale_cache_fns | |
872 | .size __ixp42x_proc_info, . - __ixp42x_proc_info | |
873 | ||
45fba084 RS |
874 | .type __ixp43x_proc_info, #object |
875 | __ixp43x_proc_info: | |
876 | .long 0x69054040 | |
877 | .long 0xfffffff0 | |
878 | .long PMD_TYPE_SECT | \ | |
879 | PMD_SECT_BUFFERABLE | \ | |
880 | PMD_SECT_CACHEABLE | \ | |
881 | PMD_SECT_AP_WRITE | \ | |
882 | PMD_SECT_AP_READ | |
883 | .long PMD_TYPE_SECT | \ | |
884 | PMD_SECT_AP_WRITE | \ | |
885 | PMD_SECT_AP_READ | |
886 | b __xscale_setup | |
887 | .long cpu_arch_name | |
888 | .long cpu_elf_name | |
889 | .long HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP | |
890 | .long cpu_ixp43x_name | |
891 | .long xscale_processor_functions | |
892 | .long v4wbi_tlb_fns | |
893 | .long xscale_mc_user_fns | |
894 | .long xscale_cache_fns | |
895 | .size __ixp43x_proc_info, . - __ixp43x_proc_info | |
896 | ||
1da177e4 LT |
897 | .type __ixp46x_proc_info, #object |
898 | __ixp46x_proc_info: | |
899 | .long 0x69054200 | |
900 | .long 0xffffff00 | |
8799ee9f RK |
901 | .long PMD_TYPE_SECT | \ |
902 | PMD_SECT_BUFFERABLE | \ | |
903 | PMD_SECT_CACHEABLE | \ | |
904 | PMD_SECT_AP_WRITE | \ | |
905 | PMD_SECT_AP_READ | |
906 | .long PMD_TYPE_SECT | \ | |
907 | PMD_SECT_AP_WRITE | \ | |
908 | PMD_SECT_AP_READ | |
1da177e4 LT |
909 | b __xscale_setup |
910 | .long cpu_arch_name | |
911 | .long cpu_elf_name | |
912 | .long HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP | |
913 | .long cpu_ixp46x_name | |
914 | .long xscale_processor_functions | |
915 | .long v4wbi_tlb_fns | |
916 | .long xscale_mc_user_fns | |
917 | .long xscale_cache_fns | |
918 | .size __ixp46x_proc_info, . - __ixp46x_proc_info | |
919 | ||
920 | .type __pxa255_proc_info,#object | |
921 | __pxa255_proc_info: | |
922 | .long 0x69052d00 | |
923 | .long 0xfffffff0 | |
924 | .long PMD_TYPE_SECT | \ | |
925 | PMD_SECT_BUFFERABLE | \ | |
926 | PMD_SECT_CACHEABLE | \ | |
927 | PMD_SECT_AP_WRITE | \ | |
928 | PMD_SECT_AP_READ | |
8799ee9f RK |
929 | .long PMD_TYPE_SECT | \ |
930 | PMD_SECT_AP_WRITE | \ | |
931 | PMD_SECT_AP_READ | |
1da177e4 LT |
932 | b __xscale_setup |
933 | .long cpu_arch_name | |
934 | .long cpu_elf_name | |
935 | .long HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP | |
936 | .long cpu_pxa255_name | |
937 | .long xscale_processor_functions | |
938 | .long v4wbi_tlb_fns | |
939 | .long xscale_mc_user_fns | |
940 | .long xscale_cache_fns | |
941 | .size __pxa255_proc_info, . - __pxa255_proc_info | |
942 | ||
943 | .type __pxa270_proc_info,#object | |
944 | __pxa270_proc_info: | |
945 | .long 0x69054110 | |
946 | .long 0xfffffff0 | |
947 | .long PMD_TYPE_SECT | \ | |
948 | PMD_SECT_BUFFERABLE | \ | |
949 | PMD_SECT_CACHEABLE | \ | |
950 | PMD_SECT_AP_WRITE | \ | |
951 | PMD_SECT_AP_READ | |
8799ee9f RK |
952 | .long PMD_TYPE_SECT | \ |
953 | PMD_SECT_AP_WRITE | \ | |
954 | PMD_SECT_AP_READ | |
1da177e4 LT |
955 | b __xscale_setup |
956 | .long cpu_arch_name | |
957 | .long cpu_elf_name | |
afe4b25e | 958 | .long HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP |
1da177e4 LT |
959 | .long cpu_pxa270_name |
960 | .long xscale_processor_functions | |
961 | .long v4wbi_tlb_fns | |
962 | .long xscale_mc_user_fns | |
963 | .long xscale_cache_fns | |
964 | .size __pxa270_proc_info, . - __pxa270_proc_info | |
965 |