[PATCH 10/10] ARM: add register documentation for __enable_mmu
Russell King - ARM Linux
linux at arm.linux.org.uk
Mon Oct 4 13:09:40 EDT 2010
Add some additional documentation on register usage in __enable_mmu
to help complete the overall picture.
Signed-off-by: Russell King <rmk+kernel at arm.linux.org.uk>
---
arch/arm/kernel/head.S | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index ed9ebe5..c11dd14 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
--
1.6.2.5
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