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 <rmk+kernel@arm.linux.org.uk>
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 @@
* 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 @@
* 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