[PATCH] ARM: init: update secondary_data register documentation
From: mirq-linux@rere.qmqm.pl (Michał Mirosław)
Date: 2018-11-10 20:37:04
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
Fix secondary_data pointer register and document other
occurrences in SMP boot code.
Fixes: 34d926266500 ("[ARM] Fix SMP booting")
Signed-off-by: Micha? Miros?aw <mirq-linux@rere.qmqm.pl>
---
arch/arm/kernel/head.S | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 6b1148cafffd..43d0ce070d29 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S@@ -413,7 +413,7 @@ ENDPROC(secondary_startup) ENDPROC(secondary_startup_arm) /* - * r6 = &secondary_data + * r7 = &secondary_data */ ENTRY(__secondary_switched) ldr sp, [r7, #12] @ get secondary_data.stack
@@ -443,6 +443,7 @@ __secondary_data: * r2 = atags or dtb pointer * r4 = TTBR pointer (low word) * r5 = TTBR pointer (high word if LPAE) + * r7 = secondary_data pointer (SMP) * r9 = processor ID * r13 = *virtual* address to jump to upon completion */
@@ -480,6 +481,7 @@ ENDPROC(__enable_mmu) * r0 = cp#15 control register * r1 = machine ID * r2 = atags or dtb pointer + * r7 = secondary_data pointer (SMP) * r9 = processor ID * r13 = *virtual* address to jump to upon completion *
--
2.19.1