aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/kernel/head.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/kernel/head.S')
-rw-r--r--arch/arm/kernel/head.S38
1 files changed, 26 insertions, 12 deletions
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index c0225da3fb21..f06ff9feb0db 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -391,6 +391,7 @@ ENDPROC(__turn_mmu_on)
391 391
392 392
393#ifdef CONFIG_SMP_ON_UP 393#ifdef CONFIG_SMP_ON_UP
394 __INIT
394__fixup_smp: 395__fixup_smp:
395 and r3, r9, #0x000f0000 @ architecture version 396 and r3, r9, #0x000f0000 @ architecture version
396 teq r3, #0x000f0000 @ CPU ID supported? 397 teq r3, #0x000f0000 @ CPU ID supported?
@@ -415,18 +416,7 @@ __fixup_smp_on_up:
415 sub r3, r0, r3 416 sub r3, r0, r3
416 add r4, r4, r3 417 add r4, r4, r3
417 add r5, r5, r3 418 add r5, r5, r3
4182: cmp r4, r5 419 b __do_fixup_smp_on_up
419 movhs pc, lr
420 ldmia r4!, {r0, r6}
421 ARM( str r6, [r0, r3] )
422 THUMB( add r0, r0, r3 )
423#ifdef __ARMEB__
424 THUMB( mov r6, r6, ror #16 ) @ Convert word order for big-endian.
425#endif
426 THUMB( strh r6, [r0], #2 ) @ For Thumb-2, store as two halfwords
427 THUMB( mov r6, r6, lsr #16 ) @ to be robust against misaligned r3.
428 THUMB( strh r6, [r0] )
429 b 2b
430ENDPROC(__fixup_smp) 420ENDPROC(__fixup_smp)
431 421
432 .align 422 .align
@@ -440,7 +430,31 @@ smp_on_up:
440 ALT_SMP(.long 1) 430 ALT_SMP(.long 1)
441 ALT_UP(.long 0) 431 ALT_UP(.long 0)
442 .popsection 432 .popsection
433#endif
443 434
435 .text
436__do_fixup_smp_on_up:
437 cmp r4, r5
438 movhs pc, lr
439 ldmia r4!, {r0, r6}
440 ARM( str r6, [r0, r3] )
441 THUMB( add r0, r0, r3 )
442#ifdef __ARMEB__
443 THUMB( mov r6, r6, ror #16 ) @ Convert word order for big-endian.
444#endif 444#endif
445 THUMB( strh r6, [r0], #2 ) @ For Thumb-2, store as two halfwords
446 THUMB( mov r6, r6, lsr #16 ) @ to be robust against misaligned r3.
447 THUMB( strh r6, [r0] )
448 b __do_fixup_smp_on_up
449ENDPROC(__do_fixup_smp_on_up)
450
451ENTRY(fixup_smp)
452 stmfd sp!, {r4 - r6, lr}
453 mov r4, r0
454 add r5, r0, r1
455 mov r3, #0
456 bl __do_fixup_smp_on_up
457 ldmfd sp!, {r4 - r6, pc}
458ENDPROC(fixup_smp)
445 459
446#include "head-common.S" 460#include "head-common.S"