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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * linux/arch/arm/mm/proc-xscale.S
4 *
5 * Author: Nicolas Pitre
6 * Created: November 2000
7 * Copyright: (C) 2000, 2001 MontaVista Software Inc.
8 *
9 * MMU functions for the Intel XScale CPUs
10 *
11 * 2001 Aug 21:
12 * some contributions by Brett Gaines <brett.w.gaines@intel.com>
13 * Copyright 2001 by Intel Corp.
14 *
15 * 2001 Sep 08:
16 * Completely revisited, many important fixes
17 * Nicolas Pitre <nico@fluxnic.net>
18 */
19
20#include <linux/linkage.h>
21#include <linux/init.h>
22#include <linux/cfi_types.h>
23#include <linux/pgtable.h>
24#include <asm/assembler.h>
25#include <asm/hwcap.h>
26#include <asm/pgtable-hwdef.h>
27#include <asm/page.h>
28#include <asm/ptrace.h>
29#include "proc-macros.S"
30
31/*
32 * This is the maximum size of an area which will be flushed. If the area
33 * is larger than this, then we flush the whole cache
34 */
35#define MAX_AREA_SIZE 32768
36
37/*
38 * the cache line size of the I and D cache
39 */
40#define CACHELINESIZE 32
41
42/*
43 * the size of the data cache
44 */
45#define CACHESIZE 32768
46
47/*
48 * Virtual address used to allocate the cache when flushed
49 *
50 * This must be an address range which is _never_ used. It should
51 * apparently have a mapping in the corresponding page table for
52 * compatibility with future CPUs that _could_ require it. For instance we
53 * don't care.
54 *
55 * This must be aligned on a 2*CACHESIZE boundary. The code selects one of
56 * the 2 areas in alternance each time the clean_d_cache macro is used.
57 * Without this the XScale core exhibits cache eviction problems and no one
58 * knows why.
59 *
60 * Reminder: the vector table is located at 0xffff0000-0xffff0fff.
61 */
62#define CLEAN_ADDR 0xfffe0000
63
64/*
65 * This macro is used to wait for a CP15 write and is needed
66 * when we have to ensure that the last operation to the co-pro
67 * was completed before continuing with operation.
68 */
69 .macro cpwait, rd
70 mrc p15, 0, \rd, c2, c0, 0 @ arbitrary read of cp15
71 mov \rd, \rd @ wait for completion
72 sub pc, pc, #4 @ flush instruction pipeline
73 .endm
74
75 .macro cpwait_ret, lr, rd
76 mrc p15, 0, \rd, c2, c0, 0 @ arbitrary read of cp15
77 sub pc, \lr, \rd, LSR #32 @ wait for completion and
78 @ flush instruction pipeline
79 .endm
80
81/*
82 * This macro cleans the entire dcache using line allocate.
83 * The main loop has been unrolled to reduce loop overhead.
84 * rd and rs are two scratch registers.
85 */
86 .macro clean_d_cache, rd, rs
87 ldr \rs, =clean_addr
88 ldr \rd, [\rs]
89 eor \rd, \rd, #CACHESIZE
90 str \rd, [\rs]
91 add \rs, \rd, #CACHESIZE
921: mcr p15, 0, \rd, c7, c2, 5 @ allocate D cache line
93 add \rd, \rd, #CACHELINESIZE
94 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 teq \rd, \rs
101 bne 1b
102 .endm
103
104 .data
105 .align 2
106clean_addr: .word CLEAN_ADDR
107
108 .text
109
110/*
111 * cpu_xscale_proc_init()
112 *
113 * Nothing too exciting at the moment
114 */
115SYM_TYPED_FUNC_START(cpu_xscale_proc_init)
116 @ enable write buffer coalescing. Some bootloader disable it
117 mrc p15, 0, r1, c1, c0, 1
118 bic r1, r1, #1
119 mcr p15, 0, r1, c1, c0, 1
120 ret lr
121SYM_FUNC_END(cpu_xscale_proc_init)
122
123/*
124 * cpu_xscale_proc_fin()
125 */
126SYM_TYPED_FUNC_START(cpu_xscale_proc_fin)
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
131 ret lr
132SYM_FUNC_END(cpu_xscale_proc_fin)
133
134/*
135 * cpu_xscale_reset(loc)
136 *
137 * Perform a soft reset of the system. Put the CPU into the
138 * same state as it would be if it had been reset, and branch
139 * to what would be the reset vector.
140 *
141 * loc: location to jump to for soft reset
142 *
143 * Beware PXA270 erratum E7.
144 */
145 .align 5
146 .pushsection .idmap.text, "ax"
147SYM_TYPED_FUNC_START(cpu_xscale_reset)
148 mov r1, #PSR_F_BIT|PSR_I_BIT|SVC_MODE
149 msr cpsr_c, r1 @ reset CPSR
150 mcr p15, 0, r1, c10, c4, 1 @ unlock I-TLB
151 mcr p15, 0, r1, c8, c5, 0 @ invalidate I-TLB
152 mrc p15, 0, r1, c1, c0, 0 @ ctrl register
153 bic r1, r1, #0x0086 @ ........B....CA.
154 bic r1, r1, #0x3900 @ ..VIZ..S........
155 sub pc, pc, #4 @ flush pipeline
156 @ *** cache line aligned ***
157 mcr p15, 0, r1, c1, c0, 0 @ ctrl register
158 bic r1, r1, #0x0001 @ ...............M
159 mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches & BTB
160 mcr p15, 0, r1, c1, c0, 0 @ ctrl register
161 @ CAUTION: MMU turned off from this point. We count on the pipeline
162 @ already containing those two last instructions to survive.
163 mcr p15, 0, ip, c8, c7, 0 @ invalidate I & D TLBs
164 ret r0
165SYM_FUNC_END(cpu_xscale_reset)
166 .popsection
167
168/*
169 * cpu_xscale_do_idle()
170 *
171 * Cause the processor to idle
172 *
173 * For now we do nothing but go to idle mode for every case
174 *
175 * XScale supports clock switching, but using idle mode support
176 * allows external hardware to react to system state changes.
177 */
178 .align 5
179
180SYM_TYPED_FUNC_START(cpu_xscale_do_idle)
181 mov r0, #1
182 mcr p14, 0, r0, c7, c0, 0 @ Go to IDLE
183 ret lr
184SYM_FUNC_END(cpu_xscale_do_idle)
185
186/* ================================= CACHE ================================ */
187
188/*
189 * flush_icache_all()
190 *
191 * Unconditionally clean and invalidate the entire icache.
192 */
193SYM_TYPED_FUNC_START(xscale_flush_icache_all)
194 mov r0, #0
195 mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
196 ret lr
197SYM_FUNC_END(xscale_flush_icache_all)
198
199/*
200 * flush_user_cache_all()
201 *
202 * Invalidate all cache entries in a particular address
203 * space.
204 */
205SYM_FUNC_ALIAS(xscale_flush_user_cache_all, xscale_flush_kern_cache_all)
206
207/*
208 * flush_kern_cache_all()
209 *
210 * Clean and invalidate the entire cache.
211 */
212SYM_TYPED_FUNC_START(xscale_flush_kern_cache_all)
213 mov r2, #VM_EXEC
214 mov ip, #0
215__flush_whole_cache:
216 clean_d_cache r0, r1
217 tst r2, #VM_EXEC
218 mcrne p15, 0, ip, c7, c5, 0 @ Invalidate I cache & BTB
219 mcrne p15, 0, ip, c7, c10, 4 @ Drain Write (& Fill) Buffer
220 ret lr
221SYM_FUNC_END(xscale_flush_kern_cache_all)
222
223/*
224 * flush_user_cache_range(start, end, vm_flags)
225 *
226 * Invalidate a range of cache entries in the specified
227 * address space.
228 *
229 * - start - start address (may not be aligned)
230 * - end - end address (exclusive, may not be aligned)
231 * - vma - vma_area_struct describing address space
232 */
233 .align 5
234SYM_TYPED_FUNC_START(xscale_flush_user_cache_range)
235 mov ip, #0
236 sub r3, r1, r0 @ calculate total size
237 cmp r3, #MAX_AREA_SIZE
238 bhs __flush_whole_cache
239
2401: tst r2, #VM_EXEC
241 mcrne p15, 0, r0, c7, c5, 1 @ Invalidate I cache line
242 mcr p15, 0, r0, c7, c10, 1 @ Clean D cache line
243 mcr p15, 0, r0, c7, c6, 1 @ Invalidate D cache line
244 add r0, r0, #CACHELINESIZE
245 cmp r0, r1
246 blo 1b
247 tst r2, #VM_EXEC
248 mcrne p15, 0, ip, c7, c5, 6 @ Invalidate BTB
249 mcrne p15, 0, ip, c7, c10, 4 @ Drain Write (& Fill) Buffer
250 ret lr
251SYM_FUNC_END(xscale_flush_user_cache_range)
252
253/*
254 * coherent_kern_range(start, end)
255 *
256 * Ensure coherency between the Icache and the Dcache in the
257 * region described by start. If you have non-snooping
258 * Harvard caches, you need to implement this function.
259 *
260 * - start - virtual start address
261 * - end - virtual end address
262 *
263 * Note: single I-cache line invalidation isn't used here since
264 * it also trashes the mini I-cache used by JTAG debuggers.
265 */
266SYM_TYPED_FUNC_START(xscale_coherent_kern_range)
267 bic r0, r0, #CACHELINESIZE - 1
2681: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
269 add r0, r0, #CACHELINESIZE
270 cmp r0, r1
271 blo 1b
272 mov r0, #0
273 mcr p15, 0, r0, c7, c5, 0 @ Invalidate I cache & BTB
274 mcr p15, 0, r0, c7, c10, 4 @ Drain Write (& Fill) Buffer
275 ret lr
276SYM_FUNC_END(xscale_coherent_kern_range)
277
278/*
279 * coherent_user_range(start, end)
280 *
281 * Ensure coherency between the Icache and the Dcache in the
282 * region described by start. If you have non-snooping
283 * Harvard caches, you need to implement this function.
284 *
285 * - start - virtual start address
286 * - end - virtual end address
287 */
288SYM_TYPED_FUNC_START(xscale_coherent_user_range)
289 bic r0, r0, #CACHELINESIZE - 1
2901: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
291 mcr p15, 0, r0, c7, c5, 1 @ Invalidate I cache entry
292 add r0, r0, #CACHELINESIZE
293 cmp r0, r1
294 blo 1b
295 mov r0, #0
296 mcr p15, 0, r0, c7, c5, 6 @ Invalidate BTB
297 mcr p15, 0, r0, c7, c10, 4 @ Drain Write (& Fill) Buffer
298 ret lr
299SYM_FUNC_END(xscale_coherent_user_range)
300
301/*
302 * flush_kern_dcache_area(void *addr, size_t size)
303 *
304 * Ensure no D cache aliasing occurs, either with itself or
305 * the I cache
306 *
307 * - addr - kernel address
308 * - size - region size
309 */
310SYM_TYPED_FUNC_START(xscale_flush_kern_dcache_area)
311 add r1, r0, r1
3121: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
313 mcr p15, 0, r0, c7, c6, 1 @ invalidate D entry
314 add r0, r0, #CACHELINESIZE
315 cmp r0, r1
316 blo 1b
317 mov r0, #0
318 mcr p15, 0, r0, c7, c5, 0 @ Invalidate I cache & BTB
319 mcr p15, 0, r0, c7, c10, 4 @ Drain Write (& Fill) Buffer
320 ret lr
321SYM_FUNC_END(xscale_flush_kern_dcache_area)
322
323/*
324 * dma_inv_range(start, end)
325 *
326 * Invalidate (discard) the specified virtual address range.
327 * May not write back any entries. If 'start' or 'end'
328 * are not cache line aligned, those lines must be written
329 * back.
330 *
331 * - start - virtual start address
332 * - end - virtual end address
333 */
334xscale_dma_inv_range:
335 tst r0, #CACHELINESIZE - 1
336 bic r0, r0, #CACHELINESIZE - 1
337 mcrne p15, 0, r0, c7, c10, 1 @ clean D entry
338 tst r1, #CACHELINESIZE - 1
339 mcrne p15, 0, r1, c7, c10, 1 @ clean D entry
3401: mcr p15, 0, r0, c7, c6, 1 @ invalidate D entry
341 add r0, r0, #CACHELINESIZE
342 cmp r0, r1
343 blo 1b
344 mcr p15, 0, r0, c7, c10, 4 @ Drain Write (& Fill) Buffer
345 ret lr
346
347/*
348 * dma_clean_range(start, end)
349 *
350 * Clean the specified virtual address range.
351 *
352 * - start - virtual start address
353 * - end - virtual end address
354 */
355xscale_dma_clean_range:
356 bic r0, r0, #CACHELINESIZE - 1
3571: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
358 add r0, r0, #CACHELINESIZE
359 cmp r0, r1
360 blo 1b
361 mcr p15, 0, r0, c7, c10, 4 @ Drain Write (& Fill) Buffer
362 ret lr
363
364/*
365 * dma_flush_range(start, end)
366 *
367 * Clean and invalidate the specified virtual address range.
368 *
369 * - start - virtual start address
370 * - end - virtual end address
371 */
372SYM_TYPED_FUNC_START(xscale_dma_flush_range)
373 bic r0, r0, #CACHELINESIZE - 1
3741: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
375 mcr p15, 0, r0, c7, c6, 1 @ invalidate D entry
376 add r0, r0, #CACHELINESIZE
377 cmp r0, r1
378 blo 1b
379 mcr p15, 0, r0, c7, c10, 4 @ Drain Write (& Fill) Buffer
380 ret lr
381SYM_FUNC_END(xscale_dma_flush_range)
382
383/*
384 * dma_map_area(start, size, dir)
385 * - start - kernel virtual start address
386 * - size - size of region
387 * - dir - DMA direction
388 */
389SYM_TYPED_FUNC_START(xscale_dma_map_area)
390 add r1, r1, r0
391 cmp r2, #DMA_TO_DEVICE
392 beq xscale_dma_clean_range
393 bcs xscale_dma_inv_range
394 b xscale_dma_flush_range
395SYM_FUNC_END(xscale_dma_map_area)
396
397/*
398 * On stepping A0/A1 of the 80200, invalidating D-cache by line doesn't
399 * clear the dirty bits, which means that if we invalidate a dirty line,
400 * the dirty data can still be written back to external memory later on.
401 *
402 * The recommended workaround is to always do a clean D-cache line before
403 * doing an invalidate D-cache line, so on the affected processors,
404 * dma_inv_range() is implemented as dma_flush_range().
405 *
406 * See erratum #25 of "Intel 80200 Processor Specification Update",
407 * revision January 22, 2003, available at:
408 * http://www.intel.com/design/iio/specupdt/273415.htm
409 */
410
411/*
412 * dma_map_area(start, size, dir)
413 * - start - kernel virtual start address
414 * - size - size of region
415 * - dir - DMA direction
416 */
417SYM_TYPED_FUNC_START(xscale_80200_A0_A1_dma_map_area)
418 add r1, r1, r0
419 teq r2, #DMA_TO_DEVICE
420 beq xscale_dma_clean_range
421 b xscale_dma_flush_range
422SYM_FUNC_END(xscale_80200_A0_A1_dma_map_area)
423
424/*
425 * dma_unmap_area(start, size, dir)
426 * - start - kernel virtual start address
427 * - size - size of region
428 * - dir - DMA direction
429 */
430SYM_TYPED_FUNC_START(xscale_dma_unmap_area)
431 ret lr
432SYM_FUNC_END(xscale_dma_unmap_area)
433
434SYM_TYPED_FUNC_START(cpu_xscale_dcache_clean_area)
4351: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
436 add r0, r0, #CACHELINESIZE
437 subs r1, r1, #CACHELINESIZE
438 bhi 1b
439 ret lr
440SYM_FUNC_END(cpu_xscale_dcache_clean_area)
441
442/* =============================== PageTable ============================== */
443
444/*
445 * cpu_xscale_switch_mm(pgd)
446 *
447 * Set the translation base pointer to be as described by pgd.
448 *
449 * pgd: new page tables
450 */
451 .align 5
452SYM_TYPED_FUNC_START(cpu_xscale_switch_mm)
453 clean_d_cache r1, r2
454 mcr p15, 0, ip, c7, c5, 0 @ Invalidate I cache & BTB
455 mcr p15, 0, ip, c7, c10, 4 @ Drain Write (& Fill) Buffer
456 mcr p15, 0, r0, c2, c0, 0 @ load page table pointer
457 mcr p15, 0, ip, c8, c7, 0 @ invalidate I & D TLBs
458 cpwait_ret lr, ip
459SYM_FUNC_END(cpu_xscale_switch_mm)
460
461/*
462 * cpu_xscale_set_pte_ext(ptep, pte, ext)
463 *
464 * Set a PTE and flush it out
465 *
466 * Errata 40: must set memory to write-through for user read-only pages.
467 */
468cpu_xscale_mt_table:
469 .long 0x00 @ L_PTE_MT_UNCACHED
470 .long PTE_BUFFERABLE @ L_PTE_MT_BUFFERABLE
471 .long PTE_CACHEABLE @ L_PTE_MT_WRITETHROUGH
472 .long PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_WRITEBACK
473 .long PTE_EXT_TEX(1) | PTE_BUFFERABLE @ L_PTE_MT_DEV_SHARED
474 .long 0x00 @ unused
475 .long PTE_EXT_TEX(1) | PTE_CACHEABLE @ L_PTE_MT_MINICACHE
476 .long PTE_EXT_TEX(1) | PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_WRITEALLOC
477 .long 0x00 @ unused
478 .long PTE_BUFFERABLE @ L_PTE_MT_DEV_WC
479 .long 0x00 @ unused
480 .long PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_DEV_CACHED
481 .long 0x00 @ L_PTE_MT_DEV_NONSHARED
482 .long 0x00 @ unused
483 .long 0x00 @ unused
484 .long 0x00 @ unused
485
486 .align 5
487SYM_TYPED_FUNC_START(cpu_xscale_set_pte_ext)
488 xscale_set_pte_ext_prologue
489
490 @
491 @ Erratum 40: must set memory to write-through for user read-only pages
492 @
493 and ip, r1, #(L_PTE_MT_MASK | L_PTE_USER | L_PTE_RDONLY) & ~(4 << 2)
494 teq ip, #L_PTE_MT_WRITEBACK | L_PTE_USER | L_PTE_RDONLY
495
496 moveq r1, #L_PTE_MT_WRITETHROUGH
497 and r1, r1, #L_PTE_MT_MASK
498 adr ip, cpu_xscale_mt_table
499 ldr ip, [ip, r1]
500 bic r2, r2, #0x0c
501 orr r2, r2, ip
502
503 xscale_set_pte_ext_epilogue
504 ret lr
505SYM_FUNC_END(cpu_xscale_set_pte_ext)
506
507 .ltorg
508 .align
509
510.globl cpu_xscale_suspend_size
511.equ cpu_xscale_suspend_size, 4 * 6
512#ifdef CONFIG_ARM_CPU_SUSPEND
513SYM_TYPED_FUNC_START(cpu_xscale_do_suspend)
514 stmfd sp!, {r4 - r9, lr}
515 mrc p14, 0, r4, c6, c0, 0 @ clock configuration, for turbo mode
516 mrc p15, 0, r5, c15, c1, 0 @ CP access reg
517 mrc p15, 0, r6, c13, c0, 0 @ PID
518 mrc p15, 0, r7, c3, c0, 0 @ domain ID
519 mrc p15, 0, r8, c1, c0, 1 @ auxiliary control reg
520 mrc p15, 0, r9, c1, c0, 0 @ control reg
521 bic r4, r4, #2 @ clear frequency change bit
522 stmia r0, {r4 - r9} @ store cp regs
523 ldmfd sp!, {r4 - r9, pc}
524SYM_FUNC_END(cpu_xscale_do_suspend)
525
526SYM_TYPED_FUNC_START(cpu_xscale_do_resume)
527 ldmia r0, {r4 - r9} @ load cp regs
528 mov ip, #0
529 mcr p15, 0, ip, c8, c7, 0 @ invalidate I & D TLBs
530 mcr p15, 0, ip, c7, c7, 0 @ invalidate I & D caches, BTB
531 mcr p14, 0, r4, c6, c0, 0 @ clock configuration, turbo mode.
532 mcr p15, 0, r5, c15, c1, 0 @ CP access reg
533 mcr p15, 0, r6, c13, c0, 0 @ PID
534 mcr p15, 0, r7, c3, c0, 0 @ domain ID
535 mcr p15, 0, r1, c2, c0, 0 @ translation table base addr
536 mcr p15, 0, r8, c1, c0, 1 @ auxiliary control reg
537 mov r0, r9 @ control register
538 b cpu_resume_mmu
539SYM_FUNC_END(cpu_xscale_do_resume)
540#endif
541
542 .type __xscale_setup, #function
543__xscale_setup:
544 mcr p15, 0, ip, c7, c7, 0 @ invalidate I, D caches & BTB
545 mcr p15, 0, ip, c7, c10, 4 @ Drain Write (& Fill) Buffer
546 mcr p15, 0, ip, c8, c7, 0 @ invalidate I, D TLBs
547 mov r0, #1 << 6 @ cp6 for IOP3xx and Bulverde
548 orr r0, r0, #1 << 13 @ Its undefined whether this
549 mcr p15, 0, r0, c15, c1, 0 @ affects USR or SVC modes
550
551 adr r5, xscale_crval
552 ldmia r5, {r5, r6}
553 mrc p15, 0, r0, c1, c0, 0 @ get control register
554 bic r0, r0, r5
555 orr r0, r0, r6
556 ret lr
557 .size __xscale_setup, . - __xscale_setup
558
559 /*
560 * R
561 * .RVI ZFRS BLDP WCAM
562 * ..11 1.01 .... .101
563 *
564 */
565 .type xscale_crval, #object
566xscale_crval:
567 crval clear=0x00003b07, mmuset=0x00003905, ucset=0x00001900
568
569 __INITDATA
570
571 @ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
572 define_processor_functions xscale, dabort=v5t_early_abort, pabort=legacy_pabort, suspend=1
573
574 .section ".rodata"
575
576 string cpu_arch_name, "armv5te"
577 string cpu_elf_name, "v5"
578
579 string cpu_80200_A0_A1_name, "XScale-80200 A0/A1"
580 string cpu_80200_name, "XScale-80200"
581 string cpu_80219_name, "XScale-80219"
582 string cpu_8032x_name, "XScale-IOP8032x Family"
583 string cpu_8033x_name, "XScale-IOP8033x Family"
584 string cpu_pxa250_name, "XScale-PXA250"
585 string cpu_pxa210_name, "XScale-PXA210"
586 string cpu_ixp42x_name, "XScale-IXP42x Family"
587 string cpu_ixp43x_name, "XScale-IXP43x Family"
588 string cpu_ixp46x_name, "XScale-IXP46x Family"
589 string cpu_ixp2400_name, "XScale-IXP2400"
590 string cpu_ixp2800_name, "XScale-IXP2800"
591 string cpu_pxa255_name, "XScale-PXA255"
592 string cpu_pxa270_name, "XScale-PXA270"
593
594 .align
595
596 .section ".proc.info.init", "a"
597
598.macro xscale_proc_info name:req, cpu_val:req, cpu_mask:req, cpu_name:req, cache
599 .type __\name\()_proc_info,#object
600__\name\()_proc_info:
601 .long \cpu_val
602 .long \cpu_mask
603 .long PMD_TYPE_SECT | \
604 PMD_SECT_BUFFERABLE | \
605 PMD_SECT_CACHEABLE | \
606 PMD_SECT_AP_WRITE | \
607 PMD_SECT_AP_READ
608 .long PMD_TYPE_SECT | \
609 PMD_SECT_AP_WRITE | \
610 PMD_SECT_AP_READ
611 initfn __xscale_setup, __\name\()_proc_info
612 .long cpu_arch_name
613 .long cpu_elf_name
614 .long HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP
615 .long \cpu_name
616 .long xscale_processor_functions
617 .long v4wbi_tlb_fns
618 .long xscale_mc_user_fns
619 .ifb \cache
620 .long xscale_cache_fns
621 .else
622 .long \cache
623 .endif
624 .size __\name\()_proc_info, . - __\name\()_proc_info
625.endm
626
627 xscale_proc_info 80200_A0_A1, 0x69052000, 0xfffffffe, cpu_80200_name, \
628 cache=xscale_80200_A0_A1_cache_fns
629 xscale_proc_info 80200, 0x69052000, 0xfffffff0, cpu_80200_name
630 xscale_proc_info 80219, 0x69052e20, 0xffffffe0, cpu_80219_name
631 xscale_proc_info 8032x, 0x69052420, 0xfffff7e0, cpu_8032x_name
632 xscale_proc_info 8033x, 0x69054010, 0xfffffd30, cpu_8033x_name
633 xscale_proc_info pxa250, 0x69052100, 0xfffff7f0, cpu_pxa250_name
634 xscale_proc_info pxa210, 0x69052120, 0xfffff3f0, cpu_pxa210_name
635 xscale_proc_info ixp2400, 0x69054190, 0xfffffff0, cpu_ixp2400_name
636 xscale_proc_info ixp2800, 0x690541a0, 0xfffffff0, cpu_ixp2800_name
637 xscale_proc_info ixp42x, 0x690541c0, 0xffffffc0, cpu_ixp42x_name
638 xscale_proc_info ixp43x, 0x69054040, 0xfffffff0, cpu_ixp43x_name
639 xscale_proc_info ixp46x, 0x69054200, 0xffffff00, cpu_ixp46x_name
640 xscale_proc_info pxa255, 0x69052d00, 0xfffffff0, cpu_pxa255_name
641 xscale_proc_info pxa270, 0x69054110, 0xfffffff0, cpu_pxa270_name
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
20 * Nicolas Pitre <nico@fluxnic.net>
21 */
22
23#include <linux/linkage.h>
24#include <linux/init.h>
25#include <asm/assembler.h>
26#include <asm/hwcap.h>
27#include <asm/pgtable.h>
28#include <asm/pgtable-hwdef.h>
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
941: 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
107clean_addr: .word CLEAN_ADDR
108
109 .text
110
111/*
112 * cpu_xscale_proc_init()
113 *
114 * Nothing too exciting at the moment
115 */
116ENTRY(cpu_xscale_proc_init)
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
121 mov pc, lr
122
123/*
124 * cpu_xscale_proc_fin()
125 */
126ENTRY(cpu_xscale_proc_fin)
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
131 mov pc, lr
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
141 *
142 * Beware PXA270 erratum E7.
143 */
144 .align 5
145 .pushsection .idmap.text, "ax"
146ENTRY(cpu_xscale_reset)
147 mov r1, #PSR_F_BIT|PSR_I_BIT|SVC_MODE
148 msr cpsr_c, r1 @ reset CPSR
149 mcr p15, 0, r1, c10, c4, 1 @ unlock I-TLB
150 mcr p15, 0, r1, c8, c5, 0 @ invalidate I-TLB
151 mrc p15, 0, r1, c1, c0, 0 @ ctrl register
152 bic r1, r1, #0x0086 @ ........B....CA.
153 bic r1, r1, #0x3900 @ ..VIZ..S........
154 sub pc, pc, #4 @ flush pipeline
155 @ *** cache line aligned ***
156 mcr p15, 0, r1, c1, c0, 0 @ ctrl register
157 bic r1, r1, #0x0001 @ ...............M
158 mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches & BTB
159 mcr p15, 0, r1, c1, c0, 0 @ ctrl register
160 @ CAUTION: MMU turned off from this point. We count on the pipeline
161 @ already containing those two last instructions to survive.
162 mcr p15, 0, ip, c8, c7, 0 @ invalidate I & D TLBs
163 mov pc, r0
164ENDPROC(cpu_xscale_reset)
165 .popsection
166
167/*
168 * cpu_xscale_do_idle()
169 *
170 * Cause the processor to idle
171 *
172 * For now we do nothing but go to idle mode for every case
173 *
174 * XScale supports clock switching, but using idle mode support
175 * allows external hardware to react to system state changes.
176 */
177 .align 5
178
179ENTRY(cpu_xscale_do_idle)
180 mov r0, #1
181 mcr p14, 0, r0, c7, c0, 0 @ Go to IDLE
182 mov pc, lr
183
184/* ================================= CACHE ================================ */
185
186/*
187 * flush_icache_all()
188 *
189 * Unconditionally clean and invalidate the entire icache.
190 */
191ENTRY(xscale_flush_icache_all)
192 mov r0, #0
193 mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
194 mov pc, lr
195ENDPROC(xscale_flush_icache_all)
196
197/*
198 * flush_user_cache_all()
199 *
200 * Invalidate all cache entries in a particular address
201 * space.
202 */
203ENTRY(xscale_flush_user_cache_all)
204 /* FALLTHROUGH */
205
206/*
207 * flush_kern_cache_all()
208 *
209 * Clean and invalidate the entire cache.
210 */
211ENTRY(xscale_flush_kern_cache_all)
212 mov r2, #VM_EXEC
213 mov ip, #0
214__flush_whole_cache:
215 clean_d_cache r0, r1
216 tst r2, #VM_EXEC
217 mcrne p15, 0, ip, c7, c5, 0 @ Invalidate I cache & BTB
218 mcrne p15, 0, ip, c7, c10, 4 @ Drain Write (& Fill) Buffer
219 mov pc, lr
220
221/*
222 * flush_user_cache_range(start, end, vm_flags)
223 *
224 * Invalidate a range of cache entries in the specified
225 * address space.
226 *
227 * - start - start address (may not be aligned)
228 * - end - end address (exclusive, may not be aligned)
229 * - vma - vma_area_struct describing address space
230 */
231 .align 5
232ENTRY(xscale_flush_user_cache_range)
233 mov ip, #0
234 sub r3, r1, r0 @ calculate total size
235 cmp r3, #MAX_AREA_SIZE
236 bhs __flush_whole_cache
237
2381: tst r2, #VM_EXEC
239 mcrne p15, 0, r0, c7, c5, 1 @ Invalidate I cache line
240 mcr p15, 0, r0, c7, c10, 1 @ Clean D cache line
241 mcr p15, 0, r0, c7, c6, 1 @ Invalidate D cache line
242 add r0, r0, #CACHELINESIZE
243 cmp r0, r1
244 blo 1b
245 tst r2, #VM_EXEC
246 mcrne p15, 0, ip, c7, c5, 6 @ Invalidate BTB
247 mcrne p15, 0, ip, c7, c10, 4 @ Drain Write (& Fill) Buffer
248 mov pc, lr
249
250/*
251 * coherent_kern_range(start, end)
252 *
253 * Ensure coherency between the Icache and the Dcache in the
254 * region described by start. If you have non-snooping
255 * Harvard caches, you need to implement this function.
256 *
257 * - start - virtual start address
258 * - end - virtual end address
259 *
260 * Note: single I-cache line invalidation isn't used here since
261 * it also trashes the mini I-cache used by JTAG debuggers.
262 */
263ENTRY(xscale_coherent_kern_range)
264 bic r0, r0, #CACHELINESIZE - 1
2651: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
266 add r0, r0, #CACHELINESIZE
267 cmp r0, r1
268 blo 1b
269 mov r0, #0
270 mcr p15, 0, r0, c7, c5, 0 @ Invalidate I cache & BTB
271 mcr p15, 0, r0, c7, c10, 4 @ Drain Write (& Fill) Buffer
272 mov pc, lr
273
274/*
275 * coherent_user_range(start, end)
276 *
277 * Ensure coherency between the Icache and the Dcache in the
278 * region described by start. If you have non-snooping
279 * Harvard caches, you need to implement this function.
280 *
281 * - start - virtual start address
282 * - end - virtual end address
283 */
284ENTRY(xscale_coherent_user_range)
285 bic r0, r0, #CACHELINESIZE - 1
2861: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
287 mcr p15, 0, r0, c7, c5, 1 @ Invalidate I cache entry
288 add r0, r0, #CACHELINESIZE
289 cmp r0, r1
290 blo 1b
291 mov r0, #0
292 mcr p15, 0, r0, c7, c5, 6 @ Invalidate BTB
293 mcr p15, 0, r0, c7, c10, 4 @ Drain Write (& Fill) Buffer
294 mov pc, lr
295
296/*
297 * flush_kern_dcache_area(void *addr, size_t size)
298 *
299 * Ensure no D cache aliasing occurs, either with itself or
300 * the I cache
301 *
302 * - addr - kernel address
303 * - size - region size
304 */
305ENTRY(xscale_flush_kern_dcache_area)
306 add r1, r0, r1
3071: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
308 mcr p15, 0, r0, c7, c6, 1 @ invalidate D entry
309 add r0, r0, #CACHELINESIZE
310 cmp r0, r1
311 blo 1b
312 mov r0, #0
313 mcr p15, 0, r0, c7, c5, 0 @ Invalidate I cache & BTB
314 mcr p15, 0, r0, c7, c10, 4 @ Drain Write (& Fill) Buffer
315 mov pc, lr
316
317/*
318 * dma_inv_range(start, end)
319 *
320 * Invalidate (discard) the specified virtual address range.
321 * May not write back any entries. If 'start' or 'end'
322 * are not cache line aligned, those lines must be written
323 * back.
324 *
325 * - start - virtual start address
326 * - end - virtual end address
327 */
328xscale_dma_inv_range:
329 tst r0, #CACHELINESIZE - 1
330 bic r0, r0, #CACHELINESIZE - 1
331 mcrne p15, 0, r0, c7, c10, 1 @ clean D entry
332 tst r1, #CACHELINESIZE - 1
333 mcrne p15, 0, r1, c7, c10, 1 @ clean D entry
3341: mcr p15, 0, r0, c7, c6, 1 @ invalidate D entry
335 add r0, r0, #CACHELINESIZE
336 cmp r0, r1
337 blo 1b
338 mcr p15, 0, r0, c7, c10, 4 @ Drain Write (& Fill) Buffer
339 mov pc, lr
340
341/*
342 * dma_clean_range(start, end)
343 *
344 * Clean the specified virtual address range.
345 *
346 * - start - virtual start address
347 * - end - virtual end address
348 */
349xscale_dma_clean_range:
350 bic r0, r0, #CACHELINESIZE - 1
3511: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
352 add r0, r0, #CACHELINESIZE
353 cmp r0, r1
354 blo 1b
355 mcr p15, 0, r0, c7, c10, 4 @ Drain Write (& Fill) Buffer
356 mov pc, lr
357
358/*
359 * dma_flush_range(start, end)
360 *
361 * Clean and invalidate the specified virtual address range.
362 *
363 * - start - virtual start address
364 * - end - virtual end address
365 */
366ENTRY(xscale_dma_flush_range)
367 bic r0, r0, #CACHELINESIZE - 1
3681: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
369 mcr p15, 0, r0, c7, c6, 1 @ invalidate D entry
370 add r0, r0, #CACHELINESIZE
371 cmp r0, r1
372 blo 1b
373 mcr p15, 0, r0, c7, c10, 4 @ Drain Write (& Fill) Buffer
374 mov pc, lr
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 */
382ENTRY(xscale_dma_map_area)
383 add r1, r1, r0
384 cmp r2, #DMA_TO_DEVICE
385 beq xscale_dma_clean_range
386 bcs xscale_dma_inv_range
387 b xscale_dma_flush_range
388ENDPROC(xscale_dma_map_area)
389
390/*
391 * dma_map_area(start, size, dir)
392 * - start - kernel virtual start address
393 * - size - size of region
394 * - dir - DMA direction
395 */
396ENTRY(xscale_80200_A0_A1_dma_map_area)
397 add r1, r1, r0
398 teq r2, #DMA_TO_DEVICE
399 beq xscale_dma_clean_range
400 b xscale_dma_flush_range
401ENDPROC(xscale_80200_A0_A1_dma_map_area)
402
403/*
404 * dma_unmap_area(start, size, dir)
405 * - start - kernel virtual start address
406 * - size - size of region
407 * - dir - DMA direction
408 */
409ENTRY(xscale_dma_unmap_area)
410 mov pc, lr
411ENDPROC(xscale_dma_unmap_area)
412
413 .globl xscale_flush_kern_cache_louis
414 .equ xscale_flush_kern_cache_louis, xscale_flush_kern_cache_all
415
416 @ define struct cpu_cache_fns (see <asm/cacheflush.h> and proc-macros.S)
417 define_cache_functions xscale
418
419/*
420 * On stepping A0/A1 of the 80200, invalidating D-cache by line doesn't
421 * clear the dirty bits, which means that if we invalidate a dirty line,
422 * the dirty data can still be written back to external memory later on.
423 *
424 * The recommended workaround is to always do a clean D-cache line before
425 * doing an invalidate D-cache line, so on the affected processors,
426 * dma_inv_range() is implemented as dma_flush_range().
427 *
428 * See erratum #25 of "Intel 80200 Processor Specification Update",
429 * revision January 22, 2003, available at:
430 * http://www.intel.com/design/iio/specupdt/273415.htm
431 */
432.macro a0_alias basename
433 .globl xscale_80200_A0_A1_\basename
434 .type xscale_80200_A0_A1_\basename , %function
435 .equ xscale_80200_A0_A1_\basename , xscale_\basename
436.endm
437
438/*
439 * Most of the cache functions are unchanged for these processor revisions.
440 * Export suitable alias symbols for the unchanged functions:
441 */
442 a0_alias flush_icache_all
443 a0_alias flush_user_cache_all
444 a0_alias flush_kern_cache_all
445 a0_alias flush_kern_cache_louis
446 a0_alias flush_user_cache_range
447 a0_alias coherent_kern_range
448 a0_alias coherent_user_range
449 a0_alias flush_kern_dcache_area
450 a0_alias dma_flush_range
451 a0_alias dma_unmap_area
452
453 @ define struct cpu_cache_fns (see <asm/cacheflush.h> and proc-macros.S)
454 define_cache_functions xscale_80200_A0_A1
455
456ENTRY(cpu_xscale_dcache_clean_area)
4571: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
458 add r0, r0, #CACHELINESIZE
459 subs r1, r1, #CACHELINESIZE
460 bhi 1b
461 mov pc, lr
462
463/* =============================== PageTable ============================== */
464
465/*
466 * cpu_xscale_switch_mm(pgd)
467 *
468 * Set the translation base pointer to be as described by pgd.
469 *
470 * pgd: new page tables
471 */
472 .align 5
473ENTRY(cpu_xscale_switch_mm)
474 clean_d_cache r1, r2
475 mcr p15, 0, ip, c7, c5, 0 @ Invalidate I cache & BTB
476 mcr p15, 0, ip, c7, c10, 4 @ Drain Write (& Fill) Buffer
477 mcr p15, 0, r0, c2, c0, 0 @ load page table pointer
478 mcr p15, 0, ip, c8, c7, 0 @ invalidate I & D TLBs
479 cpwait_ret lr, ip
480
481/*
482 * cpu_xscale_set_pte_ext(ptep, pte, ext)
483 *
484 * Set a PTE and flush it out
485 *
486 * Errata 40: must set memory to write-through for user read-only pages.
487 */
488cpu_xscale_mt_table:
489 .long 0x00 @ L_PTE_MT_UNCACHED
490 .long PTE_BUFFERABLE @ L_PTE_MT_BUFFERABLE
491 .long PTE_CACHEABLE @ L_PTE_MT_WRITETHROUGH
492 .long PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_WRITEBACK
493 .long PTE_EXT_TEX(1) | PTE_BUFFERABLE @ L_PTE_MT_DEV_SHARED
494 .long 0x00 @ unused
495 .long PTE_EXT_TEX(1) | PTE_CACHEABLE @ L_PTE_MT_MINICACHE
496 .long PTE_EXT_TEX(1) | PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_WRITEALLOC
497 .long 0x00 @ unused
498 .long PTE_BUFFERABLE @ L_PTE_MT_DEV_WC
499 .long 0x00 @ unused
500 .long PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_DEV_CACHED
501 .long 0x00 @ L_PTE_MT_DEV_NONSHARED
502 .long 0x00 @ unused
503 .long 0x00 @ unused
504 .long 0x00 @ unused
505
506 .align 5
507ENTRY(cpu_xscale_set_pte_ext)
508 xscale_set_pte_ext_prologue
509
510 @
511 @ Erratum 40: must set memory to write-through for user read-only pages
512 @
513 and ip, r1, #(L_PTE_MT_MASK | L_PTE_USER | L_PTE_RDONLY) & ~(4 << 2)
514 teq ip, #L_PTE_MT_WRITEBACK | L_PTE_USER | L_PTE_RDONLY
515
516 moveq r1, #L_PTE_MT_WRITETHROUGH
517 and r1, r1, #L_PTE_MT_MASK
518 adr ip, cpu_xscale_mt_table
519 ldr ip, [ip, r1]
520 bic r2, r2, #0x0c
521 orr r2, r2, ip
522
523 xscale_set_pte_ext_epilogue
524 mov pc, lr
525
526 .ltorg
527 .align
528
529.globl cpu_xscale_suspend_size
530.equ cpu_xscale_suspend_size, 4 * 6
531#ifdef CONFIG_ARM_CPU_SUSPEND
532ENTRY(cpu_xscale_do_suspend)
533 stmfd sp!, {r4 - r9, lr}
534 mrc p14, 0, r4, c6, c0, 0 @ clock configuration, for turbo mode
535 mrc p15, 0, r5, c15, c1, 0 @ CP access reg
536 mrc p15, 0, r6, c13, c0, 0 @ PID
537 mrc p15, 0, r7, c3, c0, 0 @ domain ID
538 mrc p15, 0, r8, c1, c1, 0 @ auxiliary control reg
539 mrc p15, 0, r9, c1, c0, 0 @ control reg
540 bic r4, r4, #2 @ clear frequency change bit
541 stmia r0, {r4 - r9} @ store cp regs
542 ldmfd sp!, {r4 - r9, pc}
543ENDPROC(cpu_xscale_do_suspend)
544
545ENTRY(cpu_xscale_do_resume)
546 ldmia r0, {r4 - r9} @ load cp regs
547 mov ip, #0
548 mcr p15, 0, ip, c8, c7, 0 @ invalidate I & D TLBs
549 mcr p15, 0, ip, c7, c7, 0 @ invalidate I & D caches, BTB
550 mcr p14, 0, r4, c6, c0, 0 @ clock configuration, turbo mode.
551 mcr p15, 0, r5, c15, c1, 0 @ CP access reg
552 mcr p15, 0, r6, c13, c0, 0 @ PID
553 mcr p15, 0, r7, c3, c0, 0 @ domain ID
554 mcr p15, 0, r1, c2, c0, 0 @ translation table base addr
555 mcr p15, 0, r8, c1, c1, 0 @ auxiliary control reg
556 mov r0, r9 @ control register
557 b cpu_resume_mmu
558ENDPROC(cpu_xscale_do_resume)
559#endif
560
561 .type __xscale_setup, #function
562__xscale_setup:
563 mcr p15, 0, ip, c7, c7, 0 @ invalidate I, D caches & BTB
564 mcr p15, 0, ip, c7, c10, 4 @ Drain Write (& Fill) Buffer
565 mcr p15, 0, ip, c8, c7, 0 @ invalidate I, D TLBs
566 mov r0, #1 << 6 @ cp6 for IOP3xx and Bulverde
567 orr r0, r0, #1 << 13 @ Its undefined whether this
568 mcr p15, 0, r0, c15, c1, 0 @ affects USR or SVC modes
569
570 adr r5, xscale_crval
571 ldmia r5, {r5, r6}
572 mrc p15, 0, r0, c1, c0, 0 @ get control register
573 bic r0, r0, r5
574 orr r0, r0, r6
575 mov pc, lr
576 .size __xscale_setup, . - __xscale_setup
577
578 /*
579 * R
580 * .RVI ZFRS BLDP WCAM
581 * ..11 1.01 .... .101
582 *
583 */
584 .type xscale_crval, #object
585xscale_crval:
586 crval clear=0x00003b07, mmuset=0x00003905, ucset=0x00001900
587
588 __INITDATA
589
590 @ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
591 define_processor_functions xscale, dabort=v5t_early_abort, pabort=legacy_pabort, suspend=1
592
593 .section ".rodata"
594
595 string cpu_arch_name, "armv5te"
596 string cpu_elf_name, "v5"
597
598 string cpu_80200_A0_A1_name, "XScale-80200 A0/A1"
599 string cpu_80200_name, "XScale-80200"
600 string cpu_80219_name, "XScale-80219"
601 string cpu_8032x_name, "XScale-IOP8032x Family"
602 string cpu_8033x_name, "XScale-IOP8033x Family"
603 string cpu_pxa250_name, "XScale-PXA250"
604 string cpu_pxa210_name, "XScale-PXA210"
605 string cpu_ixp42x_name, "XScale-IXP42x Family"
606 string cpu_ixp43x_name, "XScale-IXP43x Family"
607 string cpu_ixp46x_name, "XScale-IXP46x Family"
608 string cpu_ixp2400_name, "XScale-IXP2400"
609 string cpu_ixp2800_name, "XScale-IXP2800"
610 string cpu_pxa255_name, "XScale-PXA255"
611 string cpu_pxa270_name, "XScale-PXA270"
612
613 .align
614
615 .section ".proc.info.init", #alloc, #execinstr
616
617.macro xscale_proc_info name:req, cpu_val:req, cpu_mask:req, cpu_name:req, cache
618 .type __\name\()_proc_info,#object
619__\name\()_proc_info:
620 .long \cpu_val
621 .long \cpu_mask
622 .long PMD_TYPE_SECT | \
623 PMD_SECT_BUFFERABLE | \
624 PMD_SECT_CACHEABLE | \
625 PMD_SECT_AP_WRITE | \
626 PMD_SECT_AP_READ
627 .long PMD_TYPE_SECT | \
628 PMD_SECT_AP_WRITE | \
629 PMD_SECT_AP_READ
630 b __xscale_setup
631 .long cpu_arch_name
632 .long cpu_elf_name
633 .long HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP
634 .long \cpu_name
635 .long xscale_processor_functions
636 .long v4wbi_tlb_fns
637 .long xscale_mc_user_fns
638 .ifb \cache
639 .long xscale_cache_fns
640 .else
641 .long \cache
642 .endif
643 .size __\name\()_proc_info, . - __\name\()_proc_info
644.endm
645
646 xscale_proc_info 80200_A0_A1, 0x69052000, 0xfffffffe, cpu_80200_name, \
647 cache=xscale_80200_A0_A1_cache_fns
648 xscale_proc_info 80200, 0x69052000, 0xfffffff0, cpu_80200_name
649 xscale_proc_info 80219, 0x69052e20, 0xffffffe0, cpu_80219_name
650 xscale_proc_info 8032x, 0x69052420, 0xfffff7e0, cpu_8032x_name
651 xscale_proc_info 8033x, 0x69054010, 0xfffffd30, cpu_8033x_name
652 xscale_proc_info pxa250, 0x69052100, 0xfffff7f0, cpu_pxa250_name
653 xscale_proc_info pxa210, 0x69052120, 0xfffff3f0, cpu_pxa210_name
654 xscale_proc_info ixp2400, 0x69054190, 0xfffffff0, cpu_ixp2400_name
655 xscale_proc_info ixp2800, 0x690541a0, 0xfffffff0, cpu_ixp2800_name
656 xscale_proc_info ixp42x, 0x690541c0, 0xffffffc0, cpu_ixp42x_name
657 xscale_proc_info ixp43x, 0x69054040, 0xfffffff0, cpu_ixp43x_name
658 xscale_proc_info ixp46x, 0x69054200, 0xffffff00, cpu_ixp46x_name
659 xscale_proc_info pxa255, 0x69052d00, 0xfffffff0, cpu_pxa255_name
660 xscale_proc_info pxa270, 0x69054110, 0xfffffff0, cpu_pxa270_name