FSP platforms: Clear area in CAR for cbmem
This patch clears the CAR area. The FSP loads the entire CAR area with a pattern instead of clearing it. At least the cbmem area needs to be cleared or cbmem will not use it. Change-Id: I829ddc26133353a784dfc01729af9b3bf427e889 Signed-off-by: Martin Roth <gaumless@gmail.com> Reviewed-on: http://review.coreboot.org/8195 Reviewed-by: Aaron Durbin <adurbin@google.com> Tested-by: build bot (Jenkins) Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
This commit is contained in:
parent
4e6f0c289b
commit
9cd155334b
|
@ -91,14 +91,22 @@ CAR_init_done:
|
|||
* ecx: stack base
|
||||
* edx: stack top
|
||||
*/
|
||||
lea -4(%edx), %esp
|
||||
mov %edx, %esp
|
||||
movl %esp, %ebp
|
||||
pushl %ebx
|
||||
|
||||
/* Clear the cbmem CAR memory region. */
|
||||
movl %ecx, %edi
|
||||
movl %edx, %ecx
|
||||
sub %edi, %ecx
|
||||
shr $2, %ecx
|
||||
xorl %eax, %eax
|
||||
rep stosl
|
||||
|
||||
before_romstage:
|
||||
post_code(0x23)
|
||||
|
||||
/* Call romstage.c main function. */
|
||||
pushl %ebx /* main takes FSP_INFO_HEADER as its argument */
|
||||
call main /* does not return */
|
||||
movb $0xB8, %ah
|
||||
jmp .Lhlt
|
||||
|
|
Loading…
Reference in New Issue