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Commit 865a4fae authored by Russell King's avatar Russell King
Browse files

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: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 00945010

arch/arm/kernel/head.S

+10 −0
Original line number Original line Diff line number Diff line
@@ -303,6 +303,13 @@ __secondary_data: 
 * Setup common bits before finally enabling the MMU.  Essentially

 * Setup common bits before finally enabling the MMU.  Essentially

 * this is just loading the page table pointer and domain access

 * this is just loading the page table pointer and domain access

 * registers.

 * 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:

__enable_mmu:

#ifdef CONFIG_ALIGNMENT_TRAP

#ifdef CONFIG_ALIGNMENT_TRAP
@@ -335,6 +342,9 @@ ENDPROC(__enable_mmu) 
 * mailing list archives BEFORE sending another post to the list.

 * mailing list archives BEFORE sending another post to the list.

 *

 *

 *  r0  = cp#15 control register

 *  r0  = cp#15 control register

 *  r1  = machine ID

 *  r2  = atags pointer

 *  r9  = processor ID

 *  r13 = *virtual* address to jump to upon completion

 *  r13 = *virtual* address to jump to upon completion

 *

 *

 * other registers depend on the function called upon completion

 * other registers depend on the function called upon completion