From 865a4fae7793b80e2b8bca76e279d6dfecbeac17 Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 4 Oct 2010 18:02:59 +0100 Subject: [PATCH] ARM: add register documentation for __enable_mmu Add some additional documentation on register usage in __enable_mmu to help complete the overall picture. Signed-off-by: Russell King --- arch/arm/kernel/head.S | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S index ed9ebe59178b..c11dd14afc11 100644 --- a/arch/arm/kernel/head.S +++ b/arch/arm/kernel/head.S @@ -303,6 +303,13 @@ __secondary_data: * Setup common bits before finally enabling the MMU. Essentially * this is just loading the page table pointer and domain access * registers. + * + * r0 = cp#15 control register + * r1 = machine ID + * r2 = atags pointer + * r4 = page table pointer + * r9 = processor ID + * r13 = *virtual* address to jump to upon completion */ __enable_mmu: #ifdef CONFIG_ALIGNMENT_TRAP @@ -335,6 +342,9 @@ ENDPROC(__enable_mmu) * mailing list archives BEFORE sending another post to the list. * * r0 = cp#15 control register + * r1 = machine ID + * r2 = atags pointer + * r9 = processor ID * r13 = *virtual* address to jump to upon completion * * other registers depend on the function called upon completion -- 2.34.1