2 * linux/arch/arm/boot/compressed/head.S
4 * Copyright (C) 1996-2002 Russell King
5 * Copyright (C) 2004 Hyok S. Choi (MPU support)
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 #include <linux/linkage.h>
16 * Note that these macros must not contain any code which is not
17 * 100% relocatable. Any attempt to do so will result in a crash.
18 * Please select one of the following when turning on debugging.
22 #if defined(CONFIG_DEBUG_ICEDCC)
24 #if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K)
25 .macro loadsp, rb, tmp
28 mcr p14, 0, \ch, c0, c5, 0
30 #elif defined(CONFIG_CPU_V7)
31 .macro loadsp, rb, tmp
34 wait: mrc p14, 0, pc, c0, c1, 0
36 mcr p14, 0, \ch, c0, c5, 0
38 #elif defined(CONFIG_CPU_XSCALE)
39 .macro loadsp, rb, tmp
42 mcr p14, 0, \ch, c8, c0, 0
45 .macro loadsp, rb, tmp
48 mcr p14, 0, \ch, c1, c0, 0
54 #include <mach/debug-macro.S>
60 #if defined(CONFIG_ARCH_SA1100)
61 .macro loadsp, rb, tmp
62 mov \rb, #0x80000000 @ physical base address
63 #ifdef CONFIG_DEBUG_LL_SER3
64 add \rb, \rb, #0x00050000 @ Ser3
66 add \rb, \rb, #0x00010000 @ Ser1
69 #elif defined(CONFIG_ARCH_S3C2410)
70 .macro loadsp, rb, tmp
72 add \rb, \rb, #0x4000 * CONFIG_S3C_LOWLEVEL_UART_PORT
75 .macro loadsp, rb, tmp
93 .macro debug_reloc_start
96 kphex r6, 8 /* processor id */
98 kphex r7, 8 /* architecture id */
99 #ifdef CONFIG_CPU_CP15
101 mrc p15, 0, r0, c1, c0
102 kphex r0, 8 /* control reg */
105 kphex r5, 8 /* decompressed kernel start */
107 kphex r9, 8 /* decompressed kernel end */
109 kphex r4, 8 /* kernel execution address */
114 .macro debug_reloc_end
116 kphex r5, 8 /* end of kernel */
119 bl memdump /* dump 256 bytes at start of kernel */
123 .section ".start", #alloc, #execinstr
125 * sort out different calling conventions
128 .arm @ Always enter in ARM state
130 .type start,#function
136 THUMB( adr r12, BSYM(1f) )
139 .word 0x016f2818 @ Magic numbers to help the loader
140 .word start @ absolute load/run zImage address
141 .word _edata @ zImage end address
143 1: mov r7, r1 @ save architecture ID
144 mov r8, r2 @ save atags pointer
146 #ifndef __ARM_ARCH_2__
148 * Booting from Angel - need to enter SVC mode and disable
149 * FIQs/IRQs (numeric definitions from angel arm.h source).
150 * We only do this if we were in user mode on entry.
152 mrs r2, cpsr @ get current mode
153 tst r2, #3 @ not user?
155 mov r0, #0x17 @ angel_SWIreason_EnterSVC
156 ARM( swi 0x123456 ) @ angel_SWI_ARM
157 THUMB( svc 0xab ) @ angel_SWI_THUMB
159 mrs r2, cpsr @ turn off interrupts to
160 orr r2, r2, #0xc0 @ prevent angel from running
163 teqp pc, #0x0c000003 @ turn off interrupts
167 * Note that some cache flushing and other stuff may
168 * be needed here - is there an Angel SWI call for this?
172 * some architecture specific code can be inserted
173 * by the linker here, but it should preserve r7, r8, and r9.
178 #ifdef CONFIG_AUTO_ZRELADDR
179 @ determine final kernel image address
181 and r4, r4, #0xf8000000
182 add r4, r4, #TEXT_OFFSET
190 ldmia r0, {r1, r2, r3, r5, r6, r9, r11, r12}
194 * We might be running at a different address. We need
195 * to fix up various pointers.
197 sub r0, r0, r1 @ calculate the delta offset
198 add r5, r5, r0 @ _start
199 add r6, r6, r0 @ _edata
201 #ifndef CONFIG_ZBOOT_ROM
202 /* malloc space is above the relocated stack (64k max) */
204 add r10, sp, #0x10000
207 * With ZBOOT_ROM the bss/stack is non relocatable,
208 * but someone could still run this code from RAM,
209 * in which case our reference is _edata.
215 * Check to see if we will overwrite ourselves.
216 * r4 = final kernel address
217 * r5 = start of this image
218 * r9 = size of decompressed image
219 * r10 = end of this image, including bss/stack/malloc space if non XIP
222 * r4 + image length <= r5 -> OK
231 * Relocate ourselves past the end of the decompressed kernel.
232 * r5 = start of this image
234 * r10 = end of the decompressed kernel
235 * Because we always copy ahead, we need to do it from the end and go
236 * backward in case the source and destination overlap.
238 /* Round up to next 256-byte boundary. */
242 sub r9, r6, r5 @ size to copy
243 add r9, r9, #31 @ rounded up to a multiple
244 bic r9, r9, #31 @ ... of 32 bytes
248 1: ldmdb r6!, {r0 - r3, r10 - r12, lr}
250 stmdb r9!, {r0 - r3, r10 - r12, lr}
253 /* Preserve offset to relocated code. */
256 #ifndef CONFIG_ZBOOT_ROM
257 /* cache_clean_flush may use the stack, so relocate it */
263 adr r0, BSYM(restart)
269 * If delta is zero, we are running at the address we were linked at.
273 * r4 = kernel execution address
274 * r7 = architecture ID
285 #ifndef CONFIG_ZBOOT_ROM
287 * If we're running fully PIC === CONFIG_ZBOOT_ROM = n,
288 * we need to fix up pointers into the BSS region.
289 * Note that the stack pointer has already been fixed up.
295 * Relocate all entries in the GOT table.
297 1: ldr r1, [r11, #0] @ relocate entries in the GOT
298 add r1, r1, r0 @ table. This fixes up the
299 str r1, [r11], #4 @ C references.
305 * Relocate entries in the GOT table. We only relocate
306 * the entries that are outside the (relocated) BSS region.
308 1: ldr r1, [r11, #0] @ relocate entries in the GOT
309 cmp r1, r2 @ entry < bss_start ||
310 cmphs r3, r1 @ _end < entry
311 addlo r1, r1, r0 @ table. This fixes up the
312 str r1, [r11], #4 @ C references.
317 not_relocated: mov r0, #0
318 1: str r0, [r2], #4 @ clear bss
326 * The C runtime environment should now be setup sufficiently.
327 * Set up some pointers, and start decompressing.
328 * r4 = kernel execution address
329 * r7 = architecture ID
333 mov r1, sp @ malloc space above stack
334 add r2, sp, #0x10000 @ 64k max
339 mov r0, #0 @ must be zero
340 mov r1, r7 @ restore architecture number
341 mov r2, r8 @ restore atags pointer
342 mov pc, r4 @ call kernel
347 .word __bss_start @ r2
351 .word _image_size @ r9
352 .word _got_start @ r11
354 .word user_stack_end @ sp
357 #ifdef CONFIG_ARCH_RPC
359 params: ldr r0, =0x10000100 @ params_phys for RPC
366 * Turn on the cache. We need to setup some page tables so that we
367 * can have both the I and D caches on.
369 * We place the page tables 16k down from the kernel execution address,
370 * and we hope that nothing else is using it. If we're using it, we
374 * r4 = kernel execution address
375 * r7 = architecture number
378 * r0, r1, r2, r3, r9, r10, r12 corrupted
379 * This routine must preserve:
383 cache_on: mov r3, #8 @ cache_on function
387 * Initialize the highest priority protection region, PR7
388 * to cover all 32bit address and cacheable and bufferable.
390 __armv4_mpu_cache_on:
391 mov r0, #0x3f @ 4G, the whole
392 mcr p15, 0, r0, c6, c7, 0 @ PR7 Area Setting
393 mcr p15, 0, r0, c6, c7, 1
396 mcr p15, 0, r0, c2, c0, 0 @ D-cache on
397 mcr p15, 0, r0, c2, c0, 1 @ I-cache on
398 mcr p15, 0, r0, c3, c0, 0 @ write-buffer on
401 mcr p15, 0, r0, c5, c0, 1 @ I-access permission
402 mcr p15, 0, r0, c5, c0, 0 @ D-access permission
405 mcr p15, 0, r0, c7, c10, 4 @ drain write buffer
406 mcr p15, 0, r0, c7, c5, 0 @ flush(inval) I-Cache
407 mcr p15, 0, r0, c7, c6, 0 @ flush(inval) D-Cache
408 mrc p15, 0, r0, c1, c0, 0 @ read control reg
409 @ ...I .... ..D. WC.M
410 orr r0, r0, #0x002d @ .... .... ..1. 11.1
411 orr r0, r0, #0x1000 @ ...1 .... .... ....
413 mcr p15, 0, r0, c1, c0, 0 @ write control reg
416 mcr p15, 0, r0, c7, c5, 0 @ flush(inval) I-Cache
417 mcr p15, 0, r0, c7, c6, 0 @ flush(inval) D-Cache
420 __armv3_mpu_cache_on:
421 mov r0, #0x3f @ 4G, the whole
422 mcr p15, 0, r0, c6, c7, 0 @ PR7 Area Setting
425 mcr p15, 0, r0, c2, c0, 0 @ cache on
426 mcr p15, 0, r0, c3, c0, 0 @ write-buffer on
429 mcr p15, 0, r0, c5, c0, 0 @ access permission
432 mcr p15, 0, r0, c7, c0, 0 @ invalidate whole cache v3
434 * ?? ARMv3 MMU does not allow reading the control register,
435 * does this really work on ARMv3 MPU?
437 mrc p15, 0, r0, c1, c0, 0 @ read control reg
438 @ .... .... .... WC.M
439 orr r0, r0, #0x000d @ .... .... .... 11.1
440 /* ?? this overwrites the value constructed above? */
442 mcr p15, 0, r0, c1, c0, 0 @ write control reg
444 /* ?? invalidate for the second time? */
445 mcr p15, 0, r0, c7, c0, 0 @ invalidate whole cache v3
448 __setup_mmu: sub r3, r4, #16384 @ Page directory size
449 bic r3, r3, #0xff @ Align the pointer
452 * Initialise the page tables, turning on the cacheable and bufferable
453 * bits for the RAM area only.
457 mov r9, r9, lsl #18 @ start of RAM
458 add r10, r9, #0x10000000 @ a reasonable RAM size
462 1: cmp r1, r9 @ if virt > start of RAM
463 orrhs r1, r1, #0x0c @ set cacheable, bufferable
464 cmp r1, r10 @ if virt > end of RAM
465 bichs r1, r1, #0x0c @ clear cacheable, bufferable
466 str r1, [r0], #4 @ 1:1 mapping
471 * If ever we are running from Flash, then we surely want the cache
472 * to be enabled also for our execution instance... We map 2MB of it
473 * so there is no map overlap problem for up to 1 MB compressed kernel.
474 * If the execution is in RAM then we would only be duplicating the above.
480 orr r1, r1, r2, lsl #20
481 add r0, r3, r2, lsl #2
488 __armv4_mmu_cache_on:
493 mcr p15, 0, r0, c7, c10, 4 @ drain write buffer
494 mcr p15, 0, r0, c8, c7, 0 @ flush I,D TLBs
495 mrc p15, 0, r0, c1, c0, 0 @ read control reg
496 orr r0, r0, #0x5000 @ I-cache enable, RR cache replacement
498 #ifdef CONFIG_CPU_ENDIAN_BE8
499 orr r0, r0, #1 << 25 @ big-endian page tables
501 bl __common_mmu_cache_on
503 mcr p15, 0, r0, c8, c7, 0 @ flush I,D TLBs
507 __armv7_mmu_cache_on:
510 mrc p15, 0, r11, c0, c1, 4 @ read ID_MMFR0
514 mcr p15, 0, r0, c7, c10, 4 @ drain write buffer
516 mcrne p15, 0, r0, c8, c7, 0 @ flush I,D TLBs
518 mrc p15, 0, r0, c1, c0, 0 @ read control reg
519 orr r0, r0, #0x5000 @ I-cache enable, RR cache replacement
520 orr r0, r0, #0x003c @ write buffer
522 #ifdef CONFIG_CPU_ENDIAN_BE8
523 orr r0, r0, #1 << 25 @ big-endian page tables
525 orrne r0, r0, #1 @ MMU enabled
527 mcrne p15, 0, r3, c2, c0, 0 @ load page table pointer
528 mcrne p15, 0, r1, c3, c0, 0 @ load domain access control
530 mcr p15, 0, r0, c1, c0, 0 @ load control register
531 mrc p15, 0, r0, c1, c0, 0 @ and read it back
533 mcr p15, 0, r0, c7, c5, 4 @ ISB
540 mcr p15, 0, r0, c7, c7, 0 @ Invalidate whole cache
541 mcr p15, 0, r0, c7, c10, 4 @ drain write buffer
542 mcr p15, 0, r0, c8, c7, 0 @ flush UTLB
543 mrc p15, 0, r0, c1, c0, 0 @ read control reg
544 orr r0, r0, #0x1000 @ I-cache enable
545 bl __common_mmu_cache_on
547 mcr p15, 0, r0, c8, c7, 0 @ flush UTLB
554 mcr p15, 0, r0, c7, c0, 0 @ invalidate whole cache v3
555 mcr p15, 0, r0, c5, c0, 0 @ invalidate whole TLB v3
557 bl __common_mmu_cache_on
559 mcr p15, 0, r0, c5, c0, 0 @ invalidate whole TLB v3
562 __common_mmu_cache_on:
563 #ifndef CONFIG_THUMB2_KERNEL
565 orr r0, r0, #0x000d @ Write buffer, mmu
568 mcr p15, 0, r3, c2, c0, 0 @ load page table pointer
569 mcr p15, 0, r1, c3, c0, 0 @ load domain access control
571 .align 5 @ cache line aligned
572 1: mcr p15, 0, r0, c1, c0, 0 @ load control register
573 mrc p15, 0, r0, c1, c0, 0 @ and read it back to
574 sub pc, lr, r0, lsr #32 @ properly flush pipeline
578 * Here follow the relocatable cache support functions for the
579 * various processors. This is a generic hook for locating an
580 * entry and jumping to an instruction at the specified offset
581 * from the start of the block. Please note this is all position
591 call_cache_fn: adr r12, proc_types
592 #ifdef CONFIG_CPU_CP15
593 mrc p15, 0, r9, c0, c0 @ get processor ID
595 ldr r9, =CONFIG_PROCESSOR_ID
597 1: ldr r1, [r12, #0] @ get value
598 ldr r2, [r12, #4] @ get mask
599 eor r1, r1, r9 @ (real ^ match)
601 ARM( addeq pc, r12, r3 ) @ call cache function
602 THUMB( addeq r12, r3 )
603 THUMB( moveq pc, r12 ) @ call cache function
608 * Table for cache operations. This is basically:
611 * - 'cache on' method instruction
612 * - 'cache off' method instruction
613 * - 'cache flush' method instruction
615 * We match an entry using: ((real_id ^ match) & mask) == 0
617 * Writethrough caches generally only need 'on' and 'off'
618 * methods. Writeback caches _must_ have the flush method
622 .type proc_types,#object
624 .word 0x41560600 @ ARM6/610
626 W(b) __arm6_mmu_cache_off @ works, but slow
627 W(b) __arm6_mmu_cache_off
630 @ b __arm6_mmu_cache_on @ untested
631 @ b __arm6_mmu_cache_off
632 @ b __armv3_mmu_cache_flush
634 .word 0x00000000 @ old ARM ID
643 .word 0x41007000 @ ARM7/710
645 W(b) __arm7_mmu_cache_off
646 W(b) __arm7_mmu_cache_off
650 .word 0x41807200 @ ARM720T (writethrough)
652 W(b) __armv4_mmu_cache_on
653 W(b) __armv4_mmu_cache_off
657 .word 0x41007400 @ ARM74x
659 W(b) __armv3_mpu_cache_on
660 W(b) __armv3_mpu_cache_off
661 W(b) __armv3_mpu_cache_flush
663 .word 0x41009400 @ ARM94x
665 W(b) __armv4_mpu_cache_on
666 W(b) __armv4_mpu_cache_off
667 W(b) __armv4_mpu_cache_flush
669 .word 0x00007000 @ ARM7 IDs
678 @ Everything from here on will be the new ID system.
680 .word 0x4401a100 @ sa110 / sa1100
682 W(b) __armv4_mmu_cache_on
683 W(b) __armv4_mmu_cache_off
684 W(b) __armv4_mmu_cache_flush
686 .word 0x6901b110 @ sa1110
688 W(b) __armv4_mmu_cache_on
689 W(b) __armv4_mmu_cache_off
690 W(b) __armv4_mmu_cache_flush
693 .word 0xffffff00 @ PXA9xx
694 W(b) __armv4_mmu_cache_on
695 W(b) __armv4_mmu_cache_off
696 W(b) __armv4_mmu_cache_flush
698 .word 0x56158000 @ PXA168
700 W(b) __armv4_mmu_cache_on
701 W(b) __armv4_mmu_cache_off
702 W(b) __armv5tej_mmu_cache_flush
704 .word 0x56050000 @ Feroceon
706 W(b) __armv4_mmu_cache_on
707 W(b) __armv4_mmu_cache_off
708 W(b) __armv5tej_mmu_cache_flush
710 #ifdef CONFIG_CPU_FEROCEON_OLD_ID
711 /* this conflicts with the standard ARMv5TE entry */
712 .long 0x41009260 @ Old Feroceon
714 b __armv4_mmu_cache_on
715 b __armv4_mmu_cache_off
716 b __armv5tej_mmu_cache_flush
719 .word 0x66015261 @ FA526
721 W(b) __fa526_cache_on
722 W(b) __armv4_mmu_cache_off
723 W(b) __fa526_cache_flush
725 @ These match on the architecture ID
727 .word 0x00020000 @ ARMv4T
729 W(b) __armv4_mmu_cache_on
730 W(b) __armv4_mmu_cache_off
731 W(b) __armv4_mmu_cache_flush
733 .word 0x00050000 @ ARMv5TE
735 W(b) __armv4_mmu_cache_on
736 W(b) __armv4_mmu_cache_off
737 W(b) __armv4_mmu_cache_flush
739 .word 0x00060000 @ ARMv5TEJ
741 W(b) __armv4_mmu_cache_on
742 W(b) __armv4_mmu_cache_off
743 W(b) __armv5tej_mmu_cache_flush
745 .word 0x0007b000 @ ARMv6
747 W(b) __armv4_mmu_cache_on
748 W(b) __armv4_mmu_cache_off
749 W(b) __armv6_mmu_cache_flush
751 .word 0x560f5810 @ Marvell PJ4 ARMv6
753 W(b) __armv4_mmu_cache_on
754 W(b) __armv4_mmu_cache_off
755 W(b) __armv6_mmu_cache_flush
757 .word 0x000f0000 @ new CPU Id
759 W(b) __armv7_mmu_cache_on
760 W(b) __armv7_mmu_cache_off
761 W(b) __armv7_mmu_cache_flush
763 .word 0 @ unrecognised type
772 .size proc_types, . - proc_types
775 * Turn off the Cache and MMU. ARMv3 does not support
776 * reading the control register, but ARMv4 does.
779 * r0, r1, r2, r3, r9, r12 corrupted
780 * This routine must preserve:
784 cache_off: mov r3, #12 @ cache_off function
787 __armv4_mpu_cache_off:
788 mrc p15, 0, r0, c1, c0
790 mcr p15, 0, r0, c1, c0 @ turn MPU and cache off
792 mcr p15, 0, r0, c7, c10, 4 @ drain write buffer
793 mcr p15, 0, r0, c7, c6, 0 @ flush D-Cache
794 mcr p15, 0, r0, c7, c5, 0 @ flush I-Cache
797 __armv3_mpu_cache_off:
798 mrc p15, 0, r0, c1, c0
800 mcr p15, 0, r0, c1, c0, 0 @ turn MPU and cache off
802 mcr p15, 0, r0, c7, c0, 0 @ invalidate whole cache v3
805 __armv4_mmu_cache_off:
807 mrc p15, 0, r0, c1, c0
809 mcr p15, 0, r0, c1, c0 @ turn MMU and cache off
811 mcr p15, 0, r0, c7, c7 @ invalidate whole cache v4
812 mcr p15, 0, r0, c8, c7 @ invalidate whole TLB v4
816 __armv7_mmu_cache_off:
817 mrc p15, 0, r0, c1, c0
823 mcr p15, 0, r0, c1, c0 @ turn MMU and cache off
825 bl __armv7_mmu_cache_flush
828 mcr p15, 0, r0, c8, c7, 0 @ invalidate whole TLB
830 mcr p15, 0, r0, c7, c5, 6 @ invalidate BTC
831 mcr p15, 0, r0, c7, c10, 4 @ DSB
832 mcr p15, 0, r0, c7, c5, 4 @ ISB
835 __arm6_mmu_cache_off:
836 mov r0, #0x00000030 @ ARM6 control reg.
837 b __armv3_mmu_cache_off
839 __arm7_mmu_cache_off:
840 mov r0, #0x00000070 @ ARM7 control reg.
841 b __armv3_mmu_cache_off
843 __armv3_mmu_cache_off:
844 mcr p15, 0, r0, c1, c0, 0 @ turn MMU and cache off
846 mcr p15, 0, r0, c7, c0, 0 @ invalidate whole cache v3
847 mcr p15, 0, r0, c5, c0, 0 @ invalidate whole TLB v3
851 * Clean and flush the cache to maintain consistency.
854 * r1, r2, r3, r9, r10, r11, r12 corrupted
855 * This routine must preserve:
863 __armv4_mpu_cache_flush:
866 mcr p15, 0, ip, c7, c6, 0 @ invalidate D cache
867 mov r1, #7 << 5 @ 8 segments
868 1: orr r3, r1, #63 << 26 @ 64 entries
869 2: mcr p15, 0, r3, c7, c14, 2 @ clean & invalidate D index
870 subs r3, r3, #1 << 26
871 bcs 2b @ entries 63 to 0
873 bcs 1b @ segments 7 to 0
876 mcrne p15, 0, ip, c7, c5, 0 @ invalidate I cache
877 mcr p15, 0, ip, c7, c10, 4 @ drain WB
882 mcr p15, 0, r1, c7, c14, 0 @ clean and invalidate D cache
883 mcr p15, 0, r1, c7, c5, 0 @ flush I cache
884 mcr p15, 0, r1, c7, c10, 4 @ drain WB
887 __armv6_mmu_cache_flush:
889 mcr p15, 0, r1, c7, c14, 0 @ clean+invalidate D
890 mcr p15, 0, r1, c7, c5, 0 @ invalidate I+BTB
891 mcr p15, 0, r1, c7, c15, 0 @ clean+invalidate unified
892 mcr p15, 0, r1, c7, c10, 4 @ drain WB
895 __armv7_mmu_cache_flush:
896 mrc p15, 0, r10, c0, c1, 5 @ read ID_MMFR1
897 tst r10, #0xf << 16 @ hierarchical cache (ARMv7)
900 mcr p15, 0, r10, c7, c14, 0 @ clean+invalidate D
903 mcr p15, 0, r10, c7, c10, 5 @ DMB
904 stmfd sp!, {r0-r7, r9-r11}
905 mrc p15, 1, r0, c0, c0, 1 @ read clidr
906 ands r3, r0, #0x7000000 @ extract loc from clidr
907 mov r3, r3, lsr #23 @ left align loc bit field
908 beq finished @ if loc is 0, then no need to clean
909 mov r10, #0 @ start clean at cache level 0
911 add r2, r10, r10, lsr #1 @ work out 3x current cache level
912 mov r1, r0, lsr r2 @ extract cache type bits from clidr
913 and r1, r1, #7 @ mask of the bits for current cache only
914 cmp r1, #2 @ see what cache we have at this level
915 blt skip @ skip if no cache, or just i-cache
916 mcr p15, 2, r10, c0, c0, 0 @ select current cache level in cssr
917 mcr p15, 0, r10, c7, c5, 4 @ isb to sych the new cssr&csidr
918 mrc p15, 1, r1, c0, c0, 0 @ read the new csidr
919 and r2, r1, #7 @ extract the length of the cache lines
920 add r2, r2, #4 @ add 4 (line length offset)
922 ands r4, r4, r1, lsr #3 @ find maximum number on the way size
923 clz r5, r4 @ find bit position of way size increment
925 ands r7, r7, r1, lsr #13 @ extract max number of the index size
927 mov r9, r4 @ create working copy of max way size
929 ARM( orr r11, r10, r9, lsl r5 ) @ factor way and cache number into r11
930 ARM( orr r11, r11, r7, lsl r2 ) @ factor index number into r11
931 THUMB( lsl r6, r9, r5 )
932 THUMB( orr r11, r10, r6 ) @ factor way and cache number into r11
933 THUMB( lsl r6, r7, r2 )
934 THUMB( orr r11, r11, r6 ) @ factor index number into r11
935 mcr p15, 0, r11, c7, c14, 2 @ clean & invalidate by set/way
936 subs r9, r9, #1 @ decrement the way
938 subs r7, r7, #1 @ decrement the index
941 add r10, r10, #2 @ increment cache number
945 ldmfd sp!, {r0-r7, r9-r11}
946 mov r10, #0 @ swith back to cache level 0
947 mcr p15, 2, r10, c0, c0, 0 @ select current cache level in cssr
949 mcr p15, 0, r10, c7, c10, 4 @ DSB
950 mcr p15, 0, r10, c7, c5, 0 @ invalidate I+BTB
951 mcr p15, 0, r10, c7, c10, 4 @ DSB
952 mcr p15, 0, r10, c7, c5, 4 @ ISB
955 __armv5tej_mmu_cache_flush:
956 1: mrc p15, 0, r15, c7, c14, 3 @ test,clean,invalidate D cache
958 mcr p15, 0, r0, c7, c5, 0 @ flush I cache
959 mcr p15, 0, r0, c7, c10, 4 @ drain WB
962 __armv4_mmu_cache_flush:
963 mov r2, #64*1024 @ default: 32K dcache size (*2)
964 mov r11, #32 @ default: 32 byte line size
965 mrc p15, 0, r3, c0, c0, 1 @ read cache type
966 teq r3, r9 @ cache ID register present?
971 mov r2, r2, lsl r1 @ base dcache size *2
972 tst r3, #1 << 14 @ test M bit
973 addne r2, r2, r2, lsr #1 @ +1/2 size if M == 1
977 mov r11, r11, lsl r3 @ cache line size in bytes
980 bic r1, r1, #63 @ align to longest cache line
983 ARM( ldr r3, [r1], r11 ) @ s/w flush D cache
984 THUMB( ldr r3, [r1] ) @ s/w flush D cache
985 THUMB( add r1, r1, r11 )
989 mcr p15, 0, r1, c7, c5, 0 @ flush I cache
990 mcr p15, 0, r1, c7, c6, 0 @ flush D cache
991 mcr p15, 0, r1, c7, c10, 4 @ drain WB
994 __armv3_mmu_cache_flush:
995 __armv3_mpu_cache_flush:
997 mcr p15, 0, r1, c7, c0, 0 @ invalidate whole cache v3
1001 * Various debugging routines for printing hex characters and
1002 * memory, which again must be relocatable.
1006 .type phexbuf,#object
1008 .size phexbuf, . - phexbuf
1010 @ phex corrupts {r0, r1, r2, r3}
1011 phex: adr r3, phexbuf
1025 @ puts corrupts {r0, r1, r2, r3}
1027 1: ldrb r2, [r0], #1
1040 @ putc corrupts {r0, r1, r2, r3}
1047 @ memdump corrupts {r0, r1, r2, r3, r10, r11, r12, lr}
1048 memdump: mov r12, r0
1051 2: mov r0, r11, lsl #2
1059 ldr r0, [r12, r11, lsl #2]
1080 .section ".stack", "aw", %nobits
1081 user_stack: .space 4096