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1/*
2 * linux/arch/arm/mm/proc-v7.S
3 *
4 * Copyright (C) 2001 Deep Blue Solutions Ltd.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This is the "shell" of the ARMv7 processor support.
11 */
12#include <linux/init.h>
13#include <linux/linkage.h>
14#include <asm/assembler.h>
15#include <asm/asm-offsets.h>
16#include <asm/hwcap.h>
17#include <asm/pgtable-hwdef.h>
18#include <asm/pgtable.h>
19
20#include "proc-macros.S"
21
22#ifdef CONFIG_ARM_LPAE
23#include "proc-v7-3level.S"
24#else
25#include "proc-v7-2level.S"
26#endif
27
28ENTRY(cpu_v7_proc_init)
29 mov pc, lr
30ENDPROC(cpu_v7_proc_init)
31
32ENTRY(cpu_v7_proc_fin)
33 mrc p15, 0, r0, c1, c0, 0 @ ctrl register
34 bic r0, r0, #0x1000 @ ...i............
35 bic r0, r0, #0x0006 @ .............ca.
36 mcr p15, 0, r0, c1, c0, 0 @ disable caches
37 mov pc, lr
38ENDPROC(cpu_v7_proc_fin)
39
40/*
41 * cpu_v7_reset(loc)
42 *
43 * Perform a soft reset of the system. Put the CPU into the
44 * same state as it would be if it had been reset, and branch
45 * to what would be the reset vector.
46 *
47 * - loc - location to jump to for soft reset
48 *
49 * This code must be executed using a flat identity mapping with
50 * caches disabled.
51 */
52 .align 5
53 .pushsection .idmap.text, "ax"
54ENTRY(cpu_v7_reset)
55 mrc p15, 0, r1, c1, c0, 0 @ ctrl register
56 bic r1, r1, #0x1 @ ...............m
57 THUMB( bic r1, r1, #1 << 30 ) @ SCTLR.TE (Thumb exceptions)
58 mcr p15, 0, r1, c1, c0, 0 @ disable MMU
59 isb
60 bx r0
61ENDPROC(cpu_v7_reset)
62 .popsection
63
64/*
65 * cpu_v7_do_idle()
66 *
67 * Idle the processor (eg, wait for interrupt).
68 *
69 * IRQs are already disabled.
70 */
71ENTRY(cpu_v7_do_idle)
72 dsb @ WFI may enter a low-power mode
73 wfi
74 mov pc, lr
75ENDPROC(cpu_v7_do_idle)
76
77ENTRY(cpu_v7_dcache_clean_area)
78 ALT_SMP(W(nop)) @ MP extensions imply L1 PTW
79 ALT_UP_B(1f)
80 mov pc, lr
811: dcache_line_size r2, r3
822: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
83 add r0, r0, r2
84 subs r1, r1, r2
85 bhi 2b
86 dsb ishst
87 mov pc, lr
88ENDPROC(cpu_v7_dcache_clean_area)
89
90 string cpu_v7_name, "ARMv7 Processor"
91 .align
92
93/* Suspend/resume support: derived from arch/arm/mach-s5pv210/sleep.S */
94.globl cpu_v7_suspend_size
95.equ cpu_v7_suspend_size, 4 * 9
96#ifdef CONFIG_ARM_CPU_SUSPEND
97ENTRY(cpu_v7_do_suspend)
98 stmfd sp!, {r4 - r10, lr}
99 mrc p15, 0, r4, c13, c0, 0 @ FCSE/PID
100 mrc p15, 0, r5, c13, c0, 3 @ User r/o thread ID
101 stmia r0!, {r4 - r5}
102#ifdef CONFIG_MMU
103 mrc p15, 0, r6, c3, c0, 0 @ Domain ID
104#ifdef CONFIG_ARM_LPAE
105 mrrc p15, 1, r5, r7, c2 @ TTB 1
106#else
107 mrc p15, 0, r7, c2, c0, 1 @ TTB 1
108#endif
109 mrc p15, 0, r11, c2, c0, 2 @ TTB control register
110#endif
111 mrc p15, 0, r8, c1, c0, 0 @ Control register
112 mrc p15, 0, r9, c1, c0, 1 @ Auxiliary control register
113 mrc p15, 0, r10, c1, c0, 2 @ Co-processor access control
114 stmia r0, {r5 - r11}
115 ldmfd sp!, {r4 - r10, pc}
116ENDPROC(cpu_v7_do_suspend)
117
118ENTRY(cpu_v7_do_resume)
119 mov ip, #0
120 mcr p15, 0, ip, c7, c5, 0 @ invalidate I cache
121 mcr p15, 0, ip, c13, c0, 1 @ set reserved context ID
122 ldmia r0!, {r4 - r5}
123 mcr p15, 0, r4, c13, c0, 0 @ FCSE/PID
124 mcr p15, 0, r5, c13, c0, 3 @ User r/o thread ID
125 ldmia r0, {r5 - r11}
126#ifdef CONFIG_MMU
127 mcr p15, 0, ip, c8, c7, 0 @ invalidate TLBs
128 mcr p15, 0, r6, c3, c0, 0 @ Domain ID
129#ifdef CONFIG_ARM_LPAE
130 mcrr p15, 0, r1, ip, c2 @ TTB 0
131 mcrr p15, 1, r5, r7, c2 @ TTB 1
132#else
133 ALT_SMP(orr r1, r1, #TTB_FLAGS_SMP)
134 ALT_UP(orr r1, r1, #TTB_FLAGS_UP)
135 mcr p15, 0, r1, c2, c0, 0 @ TTB 0
136 mcr p15, 0, r7, c2, c0, 1 @ TTB 1
137#endif
138 mcr p15, 0, r11, c2, c0, 2 @ TTB control register
139 ldr r4, =PRRR @ PRRR
140 ldr r5, =NMRR @ NMRR
141 mcr p15, 0, r4, c10, c2, 0 @ write PRRR
142 mcr p15, 0, r5, c10, c2, 1 @ write NMRR
143#endif /* CONFIG_MMU */
144 mrc p15, 0, r4, c1, c0, 1 @ Read Auxiliary control register
145 teq r4, r9 @ Is it already set?
146 mcrne p15, 0, r9, c1, c0, 1 @ No, so write it
147 mcr p15, 0, r10, c1, c0, 2 @ Co-processor access control
148 isb
149 dsb
150 mov r0, r8 @ control register
151 b cpu_resume_mmu
152ENDPROC(cpu_v7_do_resume)
153#endif
154
155#ifdef CONFIG_CPU_PJ4B
156 globl_equ cpu_pj4b_switch_mm, cpu_v7_switch_mm
157 globl_equ cpu_pj4b_set_pte_ext, cpu_v7_set_pte_ext
158 globl_equ cpu_pj4b_proc_init, cpu_v7_proc_init
159 globl_equ cpu_pj4b_proc_fin, cpu_v7_proc_fin
160 globl_equ cpu_pj4b_reset, cpu_v7_reset
161#ifdef CONFIG_PJ4B_ERRATA_4742
162ENTRY(cpu_pj4b_do_idle)
163 dsb @ WFI may enter a low-power mode
164 wfi
165 dsb @barrier
166 mov pc, lr
167ENDPROC(cpu_pj4b_do_idle)
168#else
169 globl_equ cpu_pj4b_do_idle, cpu_v7_do_idle
170#endif
171 globl_equ cpu_pj4b_dcache_clean_area, cpu_v7_dcache_clean_area
172 globl_equ cpu_pj4b_do_suspend, cpu_v7_do_suspend
173 globl_equ cpu_pj4b_do_resume, cpu_v7_do_resume
174 globl_equ cpu_pj4b_suspend_size, cpu_v7_suspend_size
175
176#endif
177
178/*
179 * __v7_setup
180 *
181 * Initialise TLB, Caches, and MMU state ready to switch the MMU
182 * on. Return in r0 the new CP15 C1 control register setting.
183 *
184 * This should be able to cover all ARMv7 cores.
185 *
186 * It is assumed that:
187 * - cache type register is implemented
188 */
189__v7_ca5mp_setup:
190__v7_ca9mp_setup:
191__v7_cr7mp_setup:
192 mov r10, #(1 << 0) @ Cache/TLB ops broadcasting
193 b 1f
194__v7_ca7mp_setup:
195__v7_ca12mp_setup:
196__v7_ca15mp_setup:
197 mov r10, #0
1981:
199#ifdef CONFIG_SMP
200 ALT_SMP(mrc p15, 0, r0, c1, c0, 1)
201 ALT_UP(mov r0, #(1 << 6)) @ fake it for UP
202 tst r0, #(1 << 6) @ SMP/nAMP mode enabled?
203 orreq r0, r0, #(1 << 6) @ Enable SMP/nAMP mode
204 orreq r0, r0, r10 @ Enable CPU-specific SMP bits
205 mcreq p15, 0, r0, c1, c0, 1
206#endif
207 b __v7_setup
208
209__v7_pj4b_setup:
210#ifdef CONFIG_CPU_PJ4B
211
212/* Auxiliary Debug Modes Control 1 Register */
213#define PJ4B_STATIC_BP (1 << 2) /* Enable Static BP */
214#define PJ4B_INTER_PARITY (1 << 8) /* Disable Internal Parity Handling */
215#define PJ4B_BCK_OFF_STREX (1 << 5) /* Enable the back off of STREX instr */
216#define PJ4B_CLEAN_LINE (1 << 16) /* Disable data transfer for clean line */
217
218/* Auxiliary Debug Modes Control 2 Register */
219#define PJ4B_FAST_LDR (1 << 23) /* Disable fast LDR */
220#define PJ4B_SNOOP_DATA (1 << 25) /* Do not interleave write and snoop data */
221#define PJ4B_CWF (1 << 27) /* Disable Critical Word First feature */
222#define PJ4B_OUTSDNG_NC (1 << 29) /* Disable outstanding non cacheable rqst */
223#define PJ4B_L1_REP_RR (1 << 30) /* L1 replacement - Strict round robin */
224#define PJ4B_AUX_DBG_CTRL2 (PJ4B_SNOOP_DATA | PJ4B_CWF |\
225 PJ4B_OUTSDNG_NC | PJ4B_L1_REP_RR)
226
227/* Auxiliary Functional Modes Control Register 0 */
228#define PJ4B_SMP_CFB (1 << 1) /* Set SMP mode. Join the coherency fabric */
229#define PJ4B_L1_PAR_CHK (1 << 2) /* Support L1 parity checking */
230#define PJ4B_BROADCAST_CACHE (1 << 8) /* Broadcast Cache and TLB maintenance */
231
232/* Auxiliary Debug Modes Control 0 Register */
233#define PJ4B_WFI_WFE (1 << 22) /* WFI/WFE - serve the DVM and back to idle */
234
235 /* Auxiliary Debug Modes Control 1 Register */
236 mrc p15, 1, r0, c15, c1, 1
237 orr r0, r0, #PJ4B_CLEAN_LINE
238 orr r0, r0, #PJ4B_BCK_OFF_STREX
239 orr r0, r0, #PJ4B_INTER_PARITY
240 bic r0, r0, #PJ4B_STATIC_BP
241 mcr p15, 1, r0, c15, c1, 1
242
243 /* Auxiliary Debug Modes Control 2 Register */
244 mrc p15, 1, r0, c15, c1, 2
245 bic r0, r0, #PJ4B_FAST_LDR
246 orr r0, r0, #PJ4B_AUX_DBG_CTRL2
247 mcr p15, 1, r0, c15, c1, 2
248
249 /* Auxiliary Functional Modes Control Register 0 */
250 mrc p15, 1, r0, c15, c2, 0
251#ifdef CONFIG_SMP
252 orr r0, r0, #PJ4B_SMP_CFB
253#endif
254 orr r0, r0, #PJ4B_L1_PAR_CHK
255 orr r0, r0, #PJ4B_BROADCAST_CACHE
256 mcr p15, 1, r0, c15, c2, 0
257
258 /* Auxiliary Debug Modes Control 0 Register */
259 mrc p15, 1, r0, c15, c1, 0
260 orr r0, r0, #PJ4B_WFI_WFE
261 mcr p15, 1, r0, c15, c1, 0
262
263#endif /* CONFIG_CPU_PJ4B */
264
265__v7_setup:
266 adr r12, __v7_setup_stack @ the local stack
267 stmia r12, {r0-r5, r7, r9, r11, lr}
268 bl v7_flush_dcache_louis
269 ldmia r12, {r0-r5, r7, r9, r11, lr}
270
271 mrc p15, 0, r0, c0, c0, 0 @ read main ID register
272 and r10, r0, #0xff000000 @ ARM?
273 teq r10, #0x41000000
274 bne 3f
275 and r5, r0, #0x00f00000 @ variant
276 and r6, r0, #0x0000000f @ revision
277 orr r6, r6, r5, lsr #20-4 @ combine variant and revision
278 ubfx r0, r0, #4, #12 @ primary part number
279
280 /* Cortex-A8 Errata */
281 ldr r10, =0x00000c08 @ Cortex-A8 primary part number
282 teq r0, r10
283 bne 2f
284#if defined(CONFIG_ARM_ERRATA_430973) && !defined(CONFIG_ARCH_MULTIPLATFORM)
285
286 teq r5, #0x00100000 @ only present in r1p*
287 mrceq p15, 0, r10, c1, c0, 1 @ read aux control register
288 orreq r10, r10, #(1 << 6) @ set IBE to 1
289 mcreq p15, 0, r10, c1, c0, 1 @ write aux control register
290#endif
291#ifdef CONFIG_ARM_ERRATA_458693
292 teq r6, #0x20 @ only present in r2p0
293 mrceq p15, 0, r10, c1, c0, 1 @ read aux control register
294 orreq r10, r10, #(1 << 5) @ set L1NEON to 1
295 orreq r10, r10, #(1 << 9) @ set PLDNOP to 1
296 mcreq p15, 0, r10, c1, c0, 1 @ write aux control register
297#endif
298#ifdef CONFIG_ARM_ERRATA_460075
299 teq r6, #0x20 @ only present in r2p0
300 mrceq p15, 1, r10, c9, c0, 2 @ read L2 cache aux ctrl register
301 tsteq r10, #1 << 22
302 orreq r10, r10, #(1 << 22) @ set the Write Allocate disable bit
303 mcreq p15, 1, r10, c9, c0, 2 @ write the L2 cache aux ctrl register
304#endif
305 b 3f
306
307 /* Cortex-A9 Errata */
3082: ldr r10, =0x00000c09 @ Cortex-A9 primary part number
309 teq r0, r10
310 bne 3f
311#ifdef CONFIG_ARM_ERRATA_742230
312 cmp r6, #0x22 @ only present up to r2p2
313 mrcle p15, 0, r10, c15, c0, 1 @ read diagnostic register
314 orrle r10, r10, #1 << 4 @ set bit #4
315 mcrle p15, 0, r10, c15, c0, 1 @ write diagnostic register
316#endif
317#ifdef CONFIG_ARM_ERRATA_742231
318 teq r6, #0x20 @ present in r2p0
319 teqne r6, #0x21 @ present in r2p1
320 teqne r6, #0x22 @ present in r2p2
321 mrceq p15, 0, r10, c15, c0, 1 @ read diagnostic register
322 orreq r10, r10, #1 << 12 @ set bit #12
323 orreq r10, r10, #1 << 22 @ set bit #22
324 mcreq p15, 0, r10, c15, c0, 1 @ write diagnostic register
325#endif
326#ifdef CONFIG_ARM_ERRATA_743622
327 teq r5, #0x00200000 @ only present in r2p*
328 mrceq p15, 0, r10, c15, c0, 1 @ read diagnostic register
329 orreq r10, r10, #1 << 6 @ set bit #6
330 mcreq p15, 0, r10, c15, c0, 1 @ write diagnostic register
331#endif
332#if defined(CONFIG_ARM_ERRATA_751472) && defined(CONFIG_SMP)
333 ALT_SMP(cmp r6, #0x30) @ present prior to r3p0
334 ALT_UP_B(1f)
335 mrclt p15, 0, r10, c15, c0, 1 @ read diagnostic register
336 orrlt r10, r10, #1 << 11 @ set bit #11
337 mcrlt p15, 0, r10, c15, c0, 1 @ write diagnostic register
3381:
339#endif
340
341 /* Cortex-A15 Errata */
3423: ldr r10, =0x00000c0f @ Cortex-A15 primary part number
343 teq r0, r10
344 bne 4f
345
346#ifdef CONFIG_ARM_ERRATA_773022
347 cmp r6, #0x4 @ only present up to r0p4
348 mrcle p15, 0, r10, c1, c0, 1 @ read aux control register
349 orrle r10, r10, #1 << 1 @ disable loop buffer
350 mcrle p15, 0, r10, c1, c0, 1 @ write aux control register
351#endif
352
3534: mov r10, #0
354 mcr p15, 0, r10, c7, c5, 0 @ I+BTB cache invalidate
355#ifdef CONFIG_MMU
356 mcr p15, 0, r10, c8, c7, 0 @ invalidate I + D TLBs
357 v7_ttb_setup r10, r4, r8, r5 @ TTBCR, TTBRx setup
358 ldr r5, =PRRR @ PRRR
359 ldr r6, =NMRR @ NMRR
360 mcr p15, 0, r5, c10, c2, 0 @ write PRRR
361 mcr p15, 0, r6, c10, c2, 1 @ write NMRR
362#endif
363 dsb @ Complete invalidations
364#ifndef CONFIG_ARM_THUMBEE
365 mrc p15, 0, r0, c0, c1, 0 @ read ID_PFR0 for ThumbEE
366 and r0, r0, #(0xf << 12) @ ThumbEE enabled field
367 teq r0, #(1 << 12) @ check if ThumbEE is present
368 bne 1f
369 mov r5, #0
370 mcr p14, 6, r5, c1, c0, 0 @ Initialize TEEHBR to 0
371 mrc p14, 6, r0, c0, c0, 0 @ load TEECR
372 orr r0, r0, #1 @ set the 1st bit in order to
373 mcr p14, 6, r0, c0, c0, 0 @ stop userspace TEEHBR access
3741:
375#endif
376 adr r5, v7_crval
377 ldmia r5, {r5, r6}
378 ARM_BE8(orr r6, r6, #1 << 25) @ big-endian page tables
379#ifdef CONFIG_SWP_EMULATE
380 orr r5, r5, #(1 << 10) @ set SW bit in "clear"
381 bic r6, r6, #(1 << 10) @ clear it in "mmuset"
382#endif
383 mrc p15, 0, r0, c1, c0, 0 @ read control register
384 bic r0, r0, r5 @ clear bits them
385 orr r0, r0, r6 @ set them
386 THUMB( orr r0, r0, #1 << 30 ) @ Thumb exceptions
387 mov pc, lr @ return to head.S:__ret
388ENDPROC(__v7_setup)
389
390 .align 2
391__v7_setup_stack:
392 .space 4 * 11 @ 11 registers
393
394 __INITDATA
395
396 @ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
397 define_processor_functions v7, dabort=v7_early_abort, pabort=v7_pabort, suspend=1
398#ifdef CONFIG_CPU_PJ4B
399 define_processor_functions pj4b, dabort=v7_early_abort, pabort=v7_pabort, suspend=1
400#endif
401
402 .section ".rodata"
403
404 string cpu_arch_name, "armv7"
405 string cpu_elf_name, "v7"
406 .align
407
408 .section ".proc.info.init", #alloc, #execinstr
409
410 /*
411 * Standard v7 proc info content
412 */
413.macro __v7_proc initfunc, mm_mmuflags = 0, io_mmuflags = 0, hwcaps = 0, proc_fns = v7_processor_functions
414 ALT_SMP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | \
415 PMD_SECT_AF | PMD_FLAGS_SMP | \mm_mmuflags)
416 ALT_UP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | \
417 PMD_SECT_AF | PMD_FLAGS_UP | \mm_mmuflags)
418 .long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | \
419 PMD_SECT_AP_READ | PMD_SECT_AF | \io_mmuflags
420 W(b) \initfunc
421 .long cpu_arch_name
422 .long cpu_elf_name
423 .long HWCAP_SWP | HWCAP_HALF | HWCAP_THUMB | HWCAP_FAST_MULT | \
424 HWCAP_EDSP | HWCAP_TLS | \hwcaps
425 .long cpu_v7_name
426 .long \proc_fns
427 .long v7wbi_tlb_fns
428 .long v6_user_fns
429 .long v7_cache_fns
430.endm
431
432#ifndef CONFIG_ARM_LPAE
433 /*
434 * ARM Ltd. Cortex A5 processor.
435 */
436 .type __v7_ca5mp_proc_info, #object
437__v7_ca5mp_proc_info:
438 .long 0x410fc050
439 .long 0xff0ffff0
440 __v7_proc __v7_ca5mp_setup
441 .size __v7_ca5mp_proc_info, . - __v7_ca5mp_proc_info
442
443 /*
444 * ARM Ltd. Cortex A9 processor.
445 */
446 .type __v7_ca9mp_proc_info, #object
447__v7_ca9mp_proc_info:
448 .long 0x410fc090
449 .long 0xff0ffff0
450 __v7_proc __v7_ca9mp_setup
451 .size __v7_ca9mp_proc_info, . - __v7_ca9mp_proc_info
452
453#endif /* CONFIG_ARM_LPAE */
454
455 /*
456 * Marvell PJ4B processor.
457 */
458#ifdef CONFIG_CPU_PJ4B
459 .type __v7_pj4b_proc_info, #object
460__v7_pj4b_proc_info:
461 .long 0x560f5800
462 .long 0xff0fff00
463 __v7_proc __v7_pj4b_setup, proc_fns = pj4b_processor_functions
464 .size __v7_pj4b_proc_info, . - __v7_pj4b_proc_info
465#endif
466
467 /*
468 * ARM Ltd. Cortex R7 processor.
469 */
470 .type __v7_cr7mp_proc_info, #object
471__v7_cr7mp_proc_info:
472 .long 0x410fc170
473 .long 0xff0ffff0
474 __v7_proc __v7_cr7mp_setup
475 .size __v7_cr7mp_proc_info, . - __v7_cr7mp_proc_info
476
477 /*
478 * ARM Ltd. Cortex A7 processor.
479 */
480 .type __v7_ca7mp_proc_info, #object
481__v7_ca7mp_proc_info:
482 .long 0x410fc070
483 .long 0xff0ffff0
484 __v7_proc __v7_ca7mp_setup
485 .size __v7_ca7mp_proc_info, . - __v7_ca7mp_proc_info
486
487 /*
488 * ARM Ltd. Cortex A12 processor.
489 */
490 .type __v7_ca12mp_proc_info, #object
491__v7_ca12mp_proc_info:
492 .long 0x410fc0d0
493 .long 0xff0ffff0
494 __v7_proc __v7_ca12mp_setup
495 .size __v7_ca12mp_proc_info, . - __v7_ca12mp_proc_info
496
497 /*
498 * ARM Ltd. Cortex A15 processor.
499 */
500 .type __v7_ca15mp_proc_info, #object
501__v7_ca15mp_proc_info:
502 .long 0x410fc0f0
503 .long 0xff0ffff0
504 __v7_proc __v7_ca15mp_setup
505 .size __v7_ca15mp_proc_info, . - __v7_ca15mp_proc_info
506
507 /*
508 * Qualcomm Inc. Krait processors.
509 */
510 .type __krait_proc_info, #object
511__krait_proc_info:
512 .long 0x510f0400 @ Required ID value
513 .long 0xff0ffc00 @ Mask for ID
514 /*
515 * Some Krait processors don't indicate support for SDIV and UDIV
516 * instructions in the ARM instruction set, even though they actually
517 * do support them.
518 */
519 __v7_proc __v7_setup, hwcaps = HWCAP_IDIV
520 .size __krait_proc_info, . - __krait_proc_info
521
522 /*
523 * Match any ARMv7 processor core.
524 */
525 .type __v7_proc_info, #object
526__v7_proc_info:
527 .long 0x000f0000 @ Required ID value
528 .long 0x000f0000 @ Mask for ID
529 __v7_proc __v7_setup
530 .size __v7_proc_info, . - __v7_proc_info
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * linux/arch/arm/mm/proc-v7.S
4 *
5 * Copyright (C) 2001 Deep Blue Solutions Ltd.
6 *
7 * This is the "shell" of the ARMv7 processor support.
8 */
9#include <linux/arm-smccc.h>
10#include <linux/init.h>
11#include <linux/linkage.h>
12#include <linux/pgtable.h>
13#include <asm/assembler.h>
14#include <asm/asm-offsets.h>
15#include <asm/hwcap.h>
16#include <asm/pgtable-hwdef.h>
17#include <asm/memory.h>
18
19#include "proc-macros.S"
20
21#ifdef CONFIG_ARM_LPAE
22#include "proc-v7-3level.S"
23#else
24#include "proc-v7-2level.S"
25#endif
26
27ENTRY(cpu_v7_proc_init)
28 ret lr
29ENDPROC(cpu_v7_proc_init)
30
31ENTRY(cpu_v7_proc_fin)
32 mrc p15, 0, r0, c1, c0, 0 @ ctrl register
33 bic r0, r0, #0x1000 @ ...i............
34 bic r0, r0, #0x0006 @ .............ca.
35 mcr p15, 0, r0, c1, c0, 0 @ disable caches
36 ret lr
37ENDPROC(cpu_v7_proc_fin)
38
39/*
40 * cpu_v7_reset(loc, hyp)
41 *
42 * Perform a soft reset of the system. Put the CPU into the
43 * same state as it would be if it had been reset, and branch
44 * to what would be the reset vector.
45 *
46 * - loc - location to jump to for soft reset
47 * - hyp - indicate if restart occurs in HYP mode
48 *
49 * This code must be executed using a flat identity mapping with
50 * caches disabled.
51 */
52 .align 5
53 .pushsection .idmap.text, "ax"
54ENTRY(cpu_v7_reset)
55 mrc p15, 0, r2, c1, c0, 0 @ ctrl register
56 bic r2, r2, #0x1 @ ...............m
57 THUMB( bic r2, r2, #1 << 30 ) @ SCTLR.TE (Thumb exceptions)
58 mcr p15, 0, r2, c1, c0, 0 @ disable MMU
59 isb
60#ifdef CONFIG_ARM_VIRT_EXT
61 teq r1, #0
62 bne __hyp_soft_restart
63#endif
64 bx r0
65ENDPROC(cpu_v7_reset)
66 .popsection
67
68/*
69 * cpu_v7_do_idle()
70 *
71 * Idle the processor (eg, wait for interrupt).
72 *
73 * IRQs are already disabled.
74 */
75ENTRY(cpu_v7_do_idle)
76 dsb @ WFI may enter a low-power mode
77 wfi
78 ret lr
79ENDPROC(cpu_v7_do_idle)
80
81ENTRY(cpu_v7_dcache_clean_area)
82 ALT_SMP(W(nop)) @ MP extensions imply L1 PTW
83 ALT_UP_B(1f)
84 ret lr
851: dcache_line_size r2, r3
862: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
87 add r0, r0, r2
88 subs r1, r1, r2
89 bhi 2b
90 dsb ishst
91 ret lr
92ENDPROC(cpu_v7_dcache_clean_area)
93
94#ifdef CONFIG_ARM_PSCI
95 .arch_extension sec
96ENTRY(cpu_v7_smc_switch_mm)
97 stmfd sp!, {r0 - r3}
98 movw r0, #:lower16:ARM_SMCCC_ARCH_WORKAROUND_1
99 movt r0, #:upper16:ARM_SMCCC_ARCH_WORKAROUND_1
100 smc #0
101 ldmfd sp!, {r0 - r3}
102 b cpu_v7_switch_mm
103ENDPROC(cpu_v7_smc_switch_mm)
104 .arch_extension virt
105ENTRY(cpu_v7_hvc_switch_mm)
106 stmfd sp!, {r0 - r3}
107 movw r0, #:lower16:ARM_SMCCC_ARCH_WORKAROUND_1
108 movt r0, #:upper16:ARM_SMCCC_ARCH_WORKAROUND_1
109 hvc #0
110 ldmfd sp!, {r0 - r3}
111 b cpu_v7_switch_mm
112ENDPROC(cpu_v7_hvc_switch_mm)
113#endif
114ENTRY(cpu_v7_iciallu_switch_mm)
115 mov r3, #0
116 mcr p15, 0, r3, c7, c5, 0 @ ICIALLU
117 b cpu_v7_switch_mm
118ENDPROC(cpu_v7_iciallu_switch_mm)
119ENTRY(cpu_v7_bpiall_switch_mm)
120 mov r3, #0
121 mcr p15, 0, r3, c7, c5, 6 @ flush BTAC/BTB
122 b cpu_v7_switch_mm
123ENDPROC(cpu_v7_bpiall_switch_mm)
124
125 string cpu_v7_name, "ARMv7 Processor"
126 .align
127
128/* Suspend/resume support: derived from arch/arm/mach-s5pv210/sleep.S */
129.globl cpu_v7_suspend_size
130.equ cpu_v7_suspend_size, 4 * 9
131#ifdef CONFIG_ARM_CPU_SUSPEND
132ENTRY(cpu_v7_do_suspend)
133 stmfd sp!, {r4 - r11, lr}
134 mrc p15, 0, r4, c13, c0, 0 @ FCSE/PID
135 mrc p15, 0, r5, c13, c0, 3 @ User r/o thread ID
136 stmia r0!, {r4 - r5}
137#ifdef CONFIG_MMU
138 mrc p15, 0, r6, c3, c0, 0 @ Domain ID
139#ifdef CONFIG_ARM_LPAE
140 mrrc p15, 1, r5, r7, c2 @ TTB 1
141#else
142 mrc p15, 0, r7, c2, c0, 1 @ TTB 1
143#endif
144 mrc p15, 0, r11, c2, c0, 2 @ TTB control register
145#endif
146 mrc p15, 0, r8, c1, c0, 0 @ Control register
147 mrc p15, 0, r9, c1, c0, 1 @ Auxiliary control register
148 mrc p15, 0, r10, c1, c0, 2 @ Co-processor access control
149 stmia r0, {r5 - r11}
150 ldmfd sp!, {r4 - r11, pc}
151ENDPROC(cpu_v7_do_suspend)
152
153ENTRY(cpu_v7_do_resume)
154 mov ip, #0
155 mcr p15, 0, ip, c7, c5, 0 @ invalidate I cache
156 mcr p15, 0, ip, c13, c0, 1 @ set reserved context ID
157 ldmia r0!, {r4 - r5}
158 mcr p15, 0, r4, c13, c0, 0 @ FCSE/PID
159 mcr p15, 0, r5, c13, c0, 3 @ User r/o thread ID
160 ldmia r0, {r5 - r11}
161#ifdef CONFIG_MMU
162 mcr p15, 0, ip, c8, c7, 0 @ invalidate TLBs
163 mcr p15, 0, r6, c3, c0, 0 @ Domain ID
164#ifdef CONFIG_ARM_LPAE
165 mcrr p15, 0, r1, ip, c2 @ TTB 0
166 mcrr p15, 1, r5, r7, c2 @ TTB 1
167#else
168 ALT_SMP(orr r1, r1, #TTB_FLAGS_SMP)
169 ALT_UP(orr r1, r1, #TTB_FLAGS_UP)
170 mcr p15, 0, r1, c2, c0, 0 @ TTB 0
171 mcr p15, 0, r7, c2, c0, 1 @ TTB 1
172#endif
173 mcr p15, 0, r11, c2, c0, 2 @ TTB control register
174 ldr r4, =PRRR @ PRRR
175 ldr r5, =NMRR @ NMRR
176 mcr p15, 0, r4, c10, c2, 0 @ write PRRR
177 mcr p15, 0, r5, c10, c2, 1 @ write NMRR
178#endif /* CONFIG_MMU */
179 mrc p15, 0, r4, c1, c0, 1 @ Read Auxiliary control register
180 teq r4, r9 @ Is it already set?
181 mcrne p15, 0, r9, c1, c0, 1 @ No, so write it
182 mcr p15, 0, r10, c1, c0, 2 @ Co-processor access control
183 isb
184 dsb
185 mov r0, r8 @ control register
186 b cpu_resume_mmu
187ENDPROC(cpu_v7_do_resume)
188#endif
189
190.globl cpu_ca9mp_suspend_size
191.equ cpu_ca9mp_suspend_size, cpu_v7_suspend_size + 4 * 2
192#ifdef CONFIG_ARM_CPU_SUSPEND
193ENTRY(cpu_ca9mp_do_suspend)
194 stmfd sp!, {r4 - r5}
195 mrc p15, 0, r4, c15, c0, 1 @ Diagnostic register
196 mrc p15, 0, r5, c15, c0, 0 @ Power register
197 stmia r0!, {r4 - r5}
198 ldmfd sp!, {r4 - r5}
199 b cpu_v7_do_suspend
200ENDPROC(cpu_ca9mp_do_suspend)
201
202ENTRY(cpu_ca9mp_do_resume)
203 ldmia r0!, {r4 - r5}
204 mrc p15, 0, r10, c15, c0, 1 @ Read Diagnostic register
205 teq r4, r10 @ Already restored?
206 mcrne p15, 0, r4, c15, c0, 1 @ No, so restore it
207 mrc p15, 0, r10, c15, c0, 0 @ Read Power register
208 teq r5, r10 @ Already restored?
209 mcrne p15, 0, r5, c15, c0, 0 @ No, so restore it
210 b cpu_v7_do_resume
211ENDPROC(cpu_ca9mp_do_resume)
212#endif
213
214#ifdef CONFIG_CPU_PJ4B
215 globl_equ cpu_pj4b_switch_mm, cpu_v7_switch_mm
216 globl_equ cpu_pj4b_set_pte_ext, cpu_v7_set_pte_ext
217 globl_equ cpu_pj4b_proc_init, cpu_v7_proc_init
218 globl_equ cpu_pj4b_proc_fin, cpu_v7_proc_fin
219 globl_equ cpu_pj4b_reset, cpu_v7_reset
220#ifdef CONFIG_PJ4B_ERRATA_4742
221ENTRY(cpu_pj4b_do_idle)
222 dsb @ WFI may enter a low-power mode
223 wfi
224 dsb @barrier
225 ret lr
226ENDPROC(cpu_pj4b_do_idle)
227#else
228 globl_equ cpu_pj4b_do_idle, cpu_v7_do_idle
229#endif
230 globl_equ cpu_pj4b_dcache_clean_area, cpu_v7_dcache_clean_area
231#ifdef CONFIG_ARM_CPU_SUSPEND
232ENTRY(cpu_pj4b_do_suspend)
233 stmfd sp!, {r6 - r10}
234 mrc p15, 1, r6, c15, c1, 0 @ save CP15 - extra features
235 mrc p15, 1, r7, c15, c2, 0 @ save CP15 - Aux Func Modes Ctrl 0
236 mrc p15, 1, r8, c15, c1, 2 @ save CP15 - Aux Debug Modes Ctrl 2
237 mrc p15, 1, r9, c15, c1, 1 @ save CP15 - Aux Debug Modes Ctrl 1
238 mrc p15, 0, r10, c9, c14, 0 @ save CP15 - PMC
239 stmia r0!, {r6 - r10}
240 ldmfd sp!, {r6 - r10}
241 b cpu_v7_do_suspend
242ENDPROC(cpu_pj4b_do_suspend)
243
244ENTRY(cpu_pj4b_do_resume)
245 ldmia r0!, {r6 - r10}
246 mcr p15, 1, r6, c15, c1, 0 @ restore CP15 - extra features
247 mcr p15, 1, r7, c15, c2, 0 @ restore CP15 - Aux Func Modes Ctrl 0
248 mcr p15, 1, r8, c15, c1, 2 @ restore CP15 - Aux Debug Modes Ctrl 2
249 mcr p15, 1, r9, c15, c1, 1 @ restore CP15 - Aux Debug Modes Ctrl 1
250 mcr p15, 0, r10, c9, c14, 0 @ restore CP15 - PMC
251 b cpu_v7_do_resume
252ENDPROC(cpu_pj4b_do_resume)
253#endif
254.globl cpu_pj4b_suspend_size
255.equ cpu_pj4b_suspend_size, cpu_v7_suspend_size + 4 * 5
256
257#endif
258
259/*
260 * __v7_setup
261 *
262 * Initialise TLB, Caches, and MMU state ready to switch the MMU
263 * on. Return in r0 the new CP15 C1 control register setting.
264 *
265 * r1, r2, r4, r5, r9, r13 must be preserved - r13 is not a stack
266 * r4: TTBR0 (low word)
267 * r5: TTBR0 (high word if LPAE)
268 * r8: TTBR1
269 * r9: Main ID register
270 *
271 * This should be able to cover all ARMv7 cores.
272 *
273 * It is assumed that:
274 * - cache type register is implemented
275 */
276__v7_ca5mp_setup:
277__v7_ca9mp_setup:
278__v7_cr7mp_setup:
279__v7_cr8mp_setup:
280 mov r10, #(1 << 0) @ Cache/TLB ops broadcasting
281 b 1f
282__v7_ca7mp_setup:
283__v7_ca12mp_setup:
284__v7_ca15mp_setup:
285__v7_b15mp_setup:
286__v7_ca17mp_setup:
287 mov r10, #0
2881: adr r0, __v7_setup_stack_ptr
289 ldr r12, [r0]
290 add r12, r12, r0 @ the local stack
291 stmia r12, {r1-r6, lr} @ v7_invalidate_l1 touches r0-r6
292 bl v7_invalidate_l1
293 ldmia r12, {r1-r6, lr}
294#ifdef CONFIG_SMP
295 orr r10, r10, #(1 << 6) @ Enable SMP/nAMP mode
296 ALT_SMP(mrc p15, 0, r0, c1, c0, 1)
297 ALT_UP(mov r0, r10) @ fake it for UP
298 orr r10, r10, r0 @ Set required bits
299 teq r10, r0 @ Were they already set?
300 mcrne p15, 0, r10, c1, c0, 1 @ No, update register
301#endif
302 b __v7_setup_cont
303
304/*
305 * Errata:
306 * r0, r10 available for use
307 * r1, r2, r4, r5, r9, r13: must be preserved
308 * r3: contains MIDR rX number in bits 23-20
309 * r6: contains MIDR rXpY as 8-bit XY number
310 * r9: MIDR
311 */
312__ca8_errata:
313#if defined(CONFIG_ARM_ERRATA_430973) && !defined(CONFIG_ARCH_MULTIPLATFORM)
314 teq r3, #0x00100000 @ only present in r1p*
315 mrceq p15, 0, r0, c1, c0, 1 @ read aux control register
316 orreq r0, r0, #(1 << 6) @ set IBE to 1
317 mcreq p15, 0, r0, c1, c0, 1 @ write aux control register
318#endif
319#ifdef CONFIG_ARM_ERRATA_458693
320 teq r6, #0x20 @ only present in r2p0
321 mrceq p15, 0, r0, c1, c0, 1 @ read aux control register
322 orreq r0, r0, #(1 << 5) @ set L1NEON to 1
323 orreq r0, r0, #(1 << 9) @ set PLDNOP to 1
324 mcreq p15, 0, r0, c1, c0, 1 @ write aux control register
325#endif
326#ifdef CONFIG_ARM_ERRATA_460075
327 teq r6, #0x20 @ only present in r2p0
328 mrceq p15, 1, r0, c9, c0, 2 @ read L2 cache aux ctrl register
329 tsteq r0, #1 << 22
330 orreq r0, r0, #(1 << 22) @ set the Write Allocate disable bit
331 mcreq p15, 1, r0, c9, c0, 2 @ write the L2 cache aux ctrl register
332#endif
333 b __errata_finish
334
335__ca9_errata:
336#ifdef CONFIG_ARM_ERRATA_742230
337 cmp r6, #0x22 @ only present up to r2p2
338 mrcle p15, 0, r0, c15, c0, 1 @ read diagnostic register
339 orrle r0, r0, #1 << 4 @ set bit #4
340 mcrle p15, 0, r0, c15, c0, 1 @ write diagnostic register
341#endif
342#ifdef CONFIG_ARM_ERRATA_742231
343 teq r6, #0x20 @ present in r2p0
344 teqne r6, #0x21 @ present in r2p1
345 teqne r6, #0x22 @ present in r2p2
346 mrceq p15, 0, r0, c15, c0, 1 @ read diagnostic register
347 orreq r0, r0, #1 << 12 @ set bit #12
348 orreq r0, r0, #1 << 22 @ set bit #22
349 mcreq p15, 0, r0, c15, c0, 1 @ write diagnostic register
350#endif
351#ifdef CONFIG_ARM_ERRATA_743622
352 teq r3, #0x00200000 @ only present in r2p*
353 mrceq p15, 0, r0, c15, c0, 1 @ read diagnostic register
354 orreq r0, r0, #1 << 6 @ set bit #6
355 mcreq p15, 0, r0, c15, c0, 1 @ write diagnostic register
356#endif
357#if defined(CONFIG_ARM_ERRATA_751472) && defined(CONFIG_SMP)
358 ALT_SMP(cmp r6, #0x30) @ present prior to r3p0
359 ALT_UP_B(1f)
360 mrclt p15, 0, r0, c15, c0, 1 @ read diagnostic register
361 orrlt r0, r0, #1 << 11 @ set bit #11
362 mcrlt p15, 0, r0, c15, c0, 1 @ write diagnostic register
3631:
364#endif
365 b __errata_finish
366
367__ca15_errata:
368#ifdef CONFIG_ARM_ERRATA_773022
369 cmp r6, #0x4 @ only present up to r0p4
370 mrcle p15, 0, r0, c1, c0, 1 @ read aux control register
371 orrle r0, r0, #1 << 1 @ disable loop buffer
372 mcrle p15, 0, r0, c1, c0, 1 @ write aux control register
373#endif
374 b __errata_finish
375
376__ca12_errata:
377#ifdef CONFIG_ARM_ERRATA_818325_852422
378 mrc p15, 0, r10, c15, c0, 1 @ read diagnostic register
379 orr r10, r10, #1 << 12 @ set bit #12
380 mcr p15, 0, r10, c15, c0, 1 @ write diagnostic register
381#endif
382#ifdef CONFIG_ARM_ERRATA_821420
383 mrc p15, 0, r10, c15, c0, 2 @ read internal feature reg
384 orr r10, r10, #1 << 1 @ set bit #1
385 mcr p15, 0, r10, c15, c0, 2 @ write internal feature reg
386#endif
387#ifdef CONFIG_ARM_ERRATA_825619
388 mrc p15, 0, r10, c15, c0, 1 @ read diagnostic register
389 orr r10, r10, #1 << 24 @ set bit #24
390 mcr p15, 0, r10, c15, c0, 1 @ write diagnostic register
391#endif
392#ifdef CONFIG_ARM_ERRATA_857271
393 mrc p15, 0, r10, c15, c0, 1 @ read diagnostic register
394 orr r10, r10, #3 << 10 @ set bits #10 and #11
395 mcr p15, 0, r10, c15, c0, 1 @ write diagnostic register
396#endif
397 b __errata_finish
398
399__ca17_errata:
400#ifdef CONFIG_ARM_ERRATA_852421
401 cmp r6, #0x12 @ only present up to r1p2
402 mrcle p15, 0, r10, c15, c0, 1 @ read diagnostic register
403 orrle r10, r10, #1 << 24 @ set bit #24
404 mcrle p15, 0, r10, c15, c0, 1 @ write diagnostic register
405#endif
406#ifdef CONFIG_ARM_ERRATA_852423
407 cmp r6, #0x12 @ only present up to r1p2
408 mrcle p15, 0, r10, c15, c0, 1 @ read diagnostic register
409 orrle r10, r10, #1 << 12 @ set bit #12
410 mcrle p15, 0, r10, c15, c0, 1 @ write diagnostic register
411#endif
412#ifdef CONFIG_ARM_ERRATA_857272
413 mrc p15, 0, r10, c15, c0, 1 @ read diagnostic register
414 orr r10, r10, #3 << 10 @ set bits #10 and #11
415 mcr p15, 0, r10, c15, c0, 1 @ write diagnostic register
416#endif
417 b __errata_finish
418
419__v7_pj4b_setup:
420#ifdef CONFIG_CPU_PJ4B
421
422/* Auxiliary Debug Modes Control 1 Register */
423#define PJ4B_STATIC_BP (1 << 2) /* Enable Static BP */
424#define PJ4B_INTER_PARITY (1 << 8) /* Disable Internal Parity Handling */
425#define PJ4B_CLEAN_LINE (1 << 16) /* Disable data transfer for clean line */
426
427/* Auxiliary Debug Modes Control 2 Register */
428#define PJ4B_FAST_LDR (1 << 23) /* Disable fast LDR */
429#define PJ4B_SNOOP_DATA (1 << 25) /* Do not interleave write and snoop data */
430#define PJ4B_CWF (1 << 27) /* Disable Critical Word First feature */
431#define PJ4B_OUTSDNG_NC (1 << 29) /* Disable outstanding non cacheable rqst */
432#define PJ4B_L1_REP_RR (1 << 30) /* L1 replacement - Strict round robin */
433#define PJ4B_AUX_DBG_CTRL2 (PJ4B_SNOOP_DATA | PJ4B_CWF |\
434 PJ4B_OUTSDNG_NC | PJ4B_L1_REP_RR)
435
436/* Auxiliary Functional Modes Control Register 0 */
437#define PJ4B_SMP_CFB (1 << 1) /* Set SMP mode. Join the coherency fabric */
438#define PJ4B_L1_PAR_CHK (1 << 2) /* Support L1 parity checking */
439#define PJ4B_BROADCAST_CACHE (1 << 8) /* Broadcast Cache and TLB maintenance */
440
441/* Auxiliary Debug Modes Control 0 Register */
442#define PJ4B_WFI_WFE (1 << 22) /* WFI/WFE - serve the DVM and back to idle */
443
444 /* Auxiliary Debug Modes Control 1 Register */
445 mrc p15, 1, r0, c15, c1, 1
446 orr r0, r0, #PJ4B_CLEAN_LINE
447 orr r0, r0, #PJ4B_INTER_PARITY
448 bic r0, r0, #PJ4B_STATIC_BP
449 mcr p15, 1, r0, c15, c1, 1
450
451 /* Auxiliary Debug Modes Control 2 Register */
452 mrc p15, 1, r0, c15, c1, 2
453 bic r0, r0, #PJ4B_FAST_LDR
454 orr r0, r0, #PJ4B_AUX_DBG_CTRL2
455 mcr p15, 1, r0, c15, c1, 2
456
457 /* Auxiliary Functional Modes Control Register 0 */
458 mrc p15, 1, r0, c15, c2, 0
459#ifdef CONFIG_SMP
460 orr r0, r0, #PJ4B_SMP_CFB
461#endif
462 orr r0, r0, #PJ4B_L1_PAR_CHK
463 orr r0, r0, #PJ4B_BROADCAST_CACHE
464 mcr p15, 1, r0, c15, c2, 0
465
466 /* Auxiliary Debug Modes Control 0 Register */
467 mrc p15, 1, r0, c15, c1, 0
468 orr r0, r0, #PJ4B_WFI_WFE
469 mcr p15, 1, r0, c15, c1, 0
470
471#endif /* CONFIG_CPU_PJ4B */
472
473__v7_setup:
474 adr r0, __v7_setup_stack_ptr
475 ldr r12, [r0]
476 add r12, r12, r0 @ the local stack
477 stmia r12, {r1-r6, lr} @ v7_invalidate_l1 touches r0-r6
478 bl v7_invalidate_l1
479 ldmia r12, {r1-r6, lr}
480
481__v7_setup_cont:
482 and r0, r9, #0xff000000 @ ARM?
483 teq r0, #0x41000000
484 bne __errata_finish
485 and r3, r9, #0x00f00000 @ variant
486 and r6, r9, #0x0000000f @ revision
487 orr r6, r6, r3, lsr #20-4 @ combine variant and revision
488 ubfx r0, r9, #4, #12 @ primary part number
489
490 /* Cortex-A8 Errata */
491 ldr r10, =0x00000c08 @ Cortex-A8 primary part number
492 teq r0, r10
493 beq __ca8_errata
494
495 /* Cortex-A9 Errata */
496 ldr r10, =0x00000c09 @ Cortex-A9 primary part number
497 teq r0, r10
498 beq __ca9_errata
499
500 /* Cortex-A12 Errata */
501 ldr r10, =0x00000c0d @ Cortex-A12 primary part number
502 teq r0, r10
503 beq __ca12_errata
504
505 /* Cortex-A17 Errata */
506 ldr r10, =0x00000c0e @ Cortex-A17 primary part number
507 teq r0, r10
508 beq __ca17_errata
509
510 /* Cortex-A15 Errata */
511 ldr r10, =0x00000c0f @ Cortex-A15 primary part number
512 teq r0, r10
513 beq __ca15_errata
514
515__errata_finish:
516 mov r10, #0
517 mcr p15, 0, r10, c7, c5, 0 @ I+BTB cache invalidate
518#ifdef CONFIG_MMU
519 mcr p15, 0, r10, c8, c7, 0 @ invalidate I + D TLBs
520 v7_ttb_setup r10, r4, r5, r8, r3 @ TTBCR, TTBRx setup
521 ldr r3, =PRRR @ PRRR
522 ldr r6, =NMRR @ NMRR
523 mcr p15, 0, r3, c10, c2, 0 @ write PRRR
524 mcr p15, 0, r6, c10, c2, 1 @ write NMRR
525#endif
526 dsb @ Complete invalidations
527#ifndef CONFIG_ARM_THUMBEE
528 mrc p15, 0, r0, c0, c1, 0 @ read ID_PFR0 for ThumbEE
529 and r0, r0, #(0xf << 12) @ ThumbEE enabled field
530 teq r0, #(1 << 12) @ check if ThumbEE is present
531 bne 1f
532 mov r3, #0
533 mcr p14, 6, r3, c1, c0, 0 @ Initialize TEEHBR to 0
534 mrc p14, 6, r0, c0, c0, 0 @ load TEECR
535 orr r0, r0, #1 @ set the 1st bit in order to
536 mcr p14, 6, r0, c0, c0, 0 @ stop userspace TEEHBR access
5371:
538#endif
539 adr r3, v7_crval
540 ldmia r3, {r3, r6}
541 ARM_BE8(orr r6, r6, #1 << 25) @ big-endian page tables
542#ifdef CONFIG_SWP_EMULATE
543 orr r3, r3, #(1 << 10) @ set SW bit in "clear"
544 bic r6, r6, #(1 << 10) @ clear it in "mmuset"
545#endif
546 mrc p15, 0, r0, c1, c0, 0 @ read control register
547 bic r0, r0, r3 @ clear bits them
548 orr r0, r0, r6 @ set them
549 THUMB( orr r0, r0, #1 << 30 ) @ Thumb exceptions
550 ret lr @ return to head.S:__ret
551
552 .align 2
553__v7_setup_stack_ptr:
554 .word PHYS_RELATIVE(__v7_setup_stack, .)
555ENDPROC(__v7_setup)
556
557 .bss
558 .align 2
559__v7_setup_stack:
560 .space 4 * 7 @ 7 registers
561
562 __INITDATA
563
564 .weak cpu_v7_bugs_init
565
566 @ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
567 define_processor_functions v7, dabort=v7_early_abort, pabort=v7_pabort, suspend=1, bugs=cpu_v7_bugs_init
568
569#ifdef CONFIG_HARDEN_BRANCH_PREDICTOR
570 @ generic v7 bpiall on context switch
571 globl_equ cpu_v7_bpiall_proc_init, cpu_v7_proc_init
572 globl_equ cpu_v7_bpiall_proc_fin, cpu_v7_proc_fin
573 globl_equ cpu_v7_bpiall_reset, cpu_v7_reset
574 globl_equ cpu_v7_bpiall_do_idle, cpu_v7_do_idle
575 globl_equ cpu_v7_bpiall_dcache_clean_area, cpu_v7_dcache_clean_area
576 globl_equ cpu_v7_bpiall_set_pte_ext, cpu_v7_set_pte_ext
577 globl_equ cpu_v7_bpiall_suspend_size, cpu_v7_suspend_size
578#ifdef CONFIG_ARM_CPU_SUSPEND
579 globl_equ cpu_v7_bpiall_do_suspend, cpu_v7_do_suspend
580 globl_equ cpu_v7_bpiall_do_resume, cpu_v7_do_resume
581#endif
582 define_processor_functions v7_bpiall, dabort=v7_early_abort, pabort=v7_pabort, suspend=1, bugs=cpu_v7_bugs_init
583
584#define HARDENED_BPIALL_PROCESSOR_FUNCTIONS v7_bpiall_processor_functions
585#else
586#define HARDENED_BPIALL_PROCESSOR_FUNCTIONS v7_processor_functions
587#endif
588
589#ifndef CONFIG_ARM_LPAE
590 @ Cortex-A8 - always needs bpiall switch_mm implementation
591 globl_equ cpu_ca8_proc_init, cpu_v7_proc_init
592 globl_equ cpu_ca8_proc_fin, cpu_v7_proc_fin
593 globl_equ cpu_ca8_reset, cpu_v7_reset
594 globl_equ cpu_ca8_do_idle, cpu_v7_do_idle
595 globl_equ cpu_ca8_dcache_clean_area, cpu_v7_dcache_clean_area
596 globl_equ cpu_ca8_set_pte_ext, cpu_v7_set_pte_ext
597 globl_equ cpu_ca8_switch_mm, cpu_v7_bpiall_switch_mm
598 globl_equ cpu_ca8_suspend_size, cpu_v7_suspend_size
599#ifdef CONFIG_ARM_CPU_SUSPEND
600 globl_equ cpu_ca8_do_suspend, cpu_v7_do_suspend
601 globl_equ cpu_ca8_do_resume, cpu_v7_do_resume
602#endif
603 define_processor_functions ca8, dabort=v7_early_abort, pabort=v7_pabort, suspend=1, bugs=cpu_v7_ca8_ibe
604
605 @ Cortex-A9 - needs more registers preserved across suspend/resume
606 @ and bpiall switch_mm for hardening
607 globl_equ cpu_ca9mp_proc_init, cpu_v7_proc_init
608 globl_equ cpu_ca9mp_proc_fin, cpu_v7_proc_fin
609 globl_equ cpu_ca9mp_reset, cpu_v7_reset
610 globl_equ cpu_ca9mp_do_idle, cpu_v7_do_idle
611 globl_equ cpu_ca9mp_dcache_clean_area, cpu_v7_dcache_clean_area
612#ifdef CONFIG_HARDEN_BRANCH_PREDICTOR
613 globl_equ cpu_ca9mp_switch_mm, cpu_v7_bpiall_switch_mm
614#else
615 globl_equ cpu_ca9mp_switch_mm, cpu_v7_switch_mm
616#endif
617 globl_equ cpu_ca9mp_set_pte_ext, cpu_v7_set_pte_ext
618 define_processor_functions ca9mp, dabort=v7_early_abort, pabort=v7_pabort, suspend=1, bugs=cpu_v7_bugs_init
619#endif
620
621 @ Cortex-A15 - needs iciallu switch_mm for hardening
622 globl_equ cpu_ca15_proc_init, cpu_v7_proc_init
623 globl_equ cpu_ca15_proc_fin, cpu_v7_proc_fin
624 globl_equ cpu_ca15_reset, cpu_v7_reset
625 globl_equ cpu_ca15_do_idle, cpu_v7_do_idle
626 globl_equ cpu_ca15_dcache_clean_area, cpu_v7_dcache_clean_area
627#ifdef CONFIG_HARDEN_BRANCH_PREDICTOR
628 globl_equ cpu_ca15_switch_mm, cpu_v7_iciallu_switch_mm
629#else
630 globl_equ cpu_ca15_switch_mm, cpu_v7_switch_mm
631#endif
632 globl_equ cpu_ca15_set_pte_ext, cpu_v7_set_pte_ext
633 globl_equ cpu_ca15_suspend_size, cpu_v7_suspend_size
634 globl_equ cpu_ca15_do_suspend, cpu_v7_do_suspend
635 globl_equ cpu_ca15_do_resume, cpu_v7_do_resume
636 define_processor_functions ca15, dabort=v7_early_abort, pabort=v7_pabort, suspend=1, bugs=cpu_v7_ca15_ibe
637#ifdef CONFIG_CPU_PJ4B
638 define_processor_functions pj4b, dabort=v7_early_abort, pabort=v7_pabort, suspend=1
639#endif
640
641 .section ".rodata"
642
643 string cpu_arch_name, "armv7"
644 string cpu_elf_name, "v7"
645 .align
646
647 .section ".proc.info.init", "a"
648
649 /*
650 * Standard v7 proc info content
651 */
652.macro __v7_proc name, initfunc, mm_mmuflags = 0, io_mmuflags = 0, hwcaps = 0, proc_fns = v7_processor_functions, cache_fns = v7_cache_fns
653 ALT_SMP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | \
654 PMD_SECT_AF | PMD_FLAGS_SMP | \mm_mmuflags)
655 ALT_UP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | \
656 PMD_SECT_AF | PMD_FLAGS_UP | \mm_mmuflags)
657 .long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | \
658 PMD_SECT_AP_READ | PMD_SECT_AF | \io_mmuflags
659 initfn \initfunc, \name
660 .long cpu_arch_name
661 .long cpu_elf_name
662 .long HWCAP_SWP | HWCAP_HALF | HWCAP_THUMB | HWCAP_FAST_MULT | \
663 HWCAP_EDSP | HWCAP_TLS | \hwcaps
664 .long cpu_v7_name
665 .long \proc_fns
666 .long v7wbi_tlb_fns
667 .long v6_user_fns
668 .long \cache_fns
669.endm
670
671#ifndef CONFIG_ARM_LPAE
672 /*
673 * ARM Ltd. Cortex A5 processor.
674 */
675 .type __v7_ca5mp_proc_info, #object
676__v7_ca5mp_proc_info:
677 .long 0x410fc050
678 .long 0xff0ffff0
679 __v7_proc __v7_ca5mp_proc_info, __v7_ca5mp_setup
680 .size __v7_ca5mp_proc_info, . - __v7_ca5mp_proc_info
681
682 /*
683 * ARM Ltd. Cortex A9 processor.
684 */
685 .type __v7_ca9mp_proc_info, #object
686__v7_ca9mp_proc_info:
687 .long 0x410fc090
688 .long 0xff0ffff0
689 __v7_proc __v7_ca9mp_proc_info, __v7_ca9mp_setup, proc_fns = ca9mp_processor_functions
690 .size __v7_ca9mp_proc_info, . - __v7_ca9mp_proc_info
691
692 /*
693 * ARM Ltd. Cortex A8 processor.
694 */
695 .type __v7_ca8_proc_info, #object
696__v7_ca8_proc_info:
697 .long 0x410fc080
698 .long 0xff0ffff0
699 __v7_proc __v7_ca8_proc_info, __v7_setup, proc_fns = ca8_processor_functions
700 .size __v7_ca8_proc_info, . - __v7_ca8_proc_info
701
702#endif /* CONFIG_ARM_LPAE */
703
704 /*
705 * Marvell PJ4B processor.
706 */
707#ifdef CONFIG_CPU_PJ4B
708 .type __v7_pj4b_proc_info, #object
709__v7_pj4b_proc_info:
710 .long 0x560f5800
711 .long 0xff0fff00
712 __v7_proc __v7_pj4b_proc_info, __v7_pj4b_setup, proc_fns = pj4b_processor_functions
713 .size __v7_pj4b_proc_info, . - __v7_pj4b_proc_info
714#endif
715
716 /*
717 * ARM Ltd. Cortex R7 processor.
718 */
719 .type __v7_cr7mp_proc_info, #object
720__v7_cr7mp_proc_info:
721 .long 0x410fc170
722 .long 0xff0ffff0
723 __v7_proc __v7_cr7mp_proc_info, __v7_cr7mp_setup
724 .size __v7_cr7mp_proc_info, . - __v7_cr7mp_proc_info
725
726 /*
727 * ARM Ltd. Cortex R8 processor.
728 */
729 .type __v7_cr8mp_proc_info, #object
730__v7_cr8mp_proc_info:
731 .long 0x410fc180
732 .long 0xff0ffff0
733 __v7_proc __v7_cr8mp_proc_info, __v7_cr8mp_setup
734 .size __v7_cr8mp_proc_info, . - __v7_cr8mp_proc_info
735
736 /*
737 * ARM Ltd. Cortex A7 processor.
738 */
739 .type __v7_ca7mp_proc_info, #object
740__v7_ca7mp_proc_info:
741 .long 0x410fc070
742 .long 0xff0ffff0
743 __v7_proc __v7_ca7mp_proc_info, __v7_ca7mp_setup
744 .size __v7_ca7mp_proc_info, . - __v7_ca7mp_proc_info
745
746 /*
747 * ARM Ltd. Cortex A12 processor.
748 */
749 .type __v7_ca12mp_proc_info, #object
750__v7_ca12mp_proc_info:
751 .long 0x410fc0d0
752 .long 0xff0ffff0
753 __v7_proc __v7_ca12mp_proc_info, __v7_ca12mp_setup, proc_fns = HARDENED_BPIALL_PROCESSOR_FUNCTIONS
754 .size __v7_ca12mp_proc_info, . - __v7_ca12mp_proc_info
755
756 /*
757 * ARM Ltd. Cortex A15 processor.
758 */
759 .type __v7_ca15mp_proc_info, #object
760__v7_ca15mp_proc_info:
761 .long 0x410fc0f0
762 .long 0xff0ffff0
763 __v7_proc __v7_ca15mp_proc_info, __v7_ca15mp_setup, proc_fns = ca15_processor_functions
764 .size __v7_ca15mp_proc_info, . - __v7_ca15mp_proc_info
765
766 /*
767 * Broadcom Corporation Brahma-B15 processor.
768 */
769 .type __v7_b15mp_proc_info, #object
770__v7_b15mp_proc_info:
771 .long 0x420f00f0
772 .long 0xff0ffff0
773 __v7_proc __v7_b15mp_proc_info, __v7_b15mp_setup, proc_fns = ca15_processor_functions, cache_fns = b15_cache_fns
774 .size __v7_b15mp_proc_info, . - __v7_b15mp_proc_info
775
776 /*
777 * ARM Ltd. Cortex A17 processor.
778 */
779 .type __v7_ca17mp_proc_info, #object
780__v7_ca17mp_proc_info:
781 .long 0x410fc0e0
782 .long 0xff0ffff0
783 __v7_proc __v7_ca17mp_proc_info, __v7_ca17mp_setup, proc_fns = HARDENED_BPIALL_PROCESSOR_FUNCTIONS
784 .size __v7_ca17mp_proc_info, . - __v7_ca17mp_proc_info
785
786 /* ARM Ltd. Cortex A73 processor */
787 .type __v7_ca73_proc_info, #object
788__v7_ca73_proc_info:
789 .long 0x410fd090
790 .long 0xff0ffff0
791 __v7_proc __v7_ca73_proc_info, __v7_setup, proc_fns = HARDENED_BPIALL_PROCESSOR_FUNCTIONS
792 .size __v7_ca73_proc_info, . - __v7_ca73_proc_info
793
794 /* ARM Ltd. Cortex A75 processor */
795 .type __v7_ca75_proc_info, #object
796__v7_ca75_proc_info:
797 .long 0x410fd0a0
798 .long 0xff0ffff0
799 __v7_proc __v7_ca75_proc_info, __v7_setup, proc_fns = HARDENED_BPIALL_PROCESSOR_FUNCTIONS
800 .size __v7_ca75_proc_info, . - __v7_ca75_proc_info
801
802 /*
803 * Qualcomm Inc. Krait processors.
804 */
805 .type __krait_proc_info, #object
806__krait_proc_info:
807 .long 0x510f0400 @ Required ID value
808 .long 0xff0ffc00 @ Mask for ID
809 /*
810 * Some Krait processors don't indicate support for SDIV and UDIV
811 * instructions in the ARM instruction set, even though they actually
812 * do support them. They also don't indicate support for fused multiply
813 * instructions even though they actually do support them.
814 */
815 __v7_proc __krait_proc_info, __v7_setup, hwcaps = HWCAP_IDIV | HWCAP_VFPv4
816 .size __krait_proc_info, . - __krait_proc_info
817
818 /*
819 * Match any ARMv7 processor core.
820 */
821 .type __v7_proc_info, #object
822__v7_proc_info:
823 .long 0x000f0000 @ Required ID value
824 .long 0x000f0000 @ Mask for ID
825 __v7_proc __v7_proc_info, __v7_setup
826 .size __v7_proc_info, . - __v7_proc_info