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arch/x86/walkcbfs.S: Fix the cbfs base addr for some fmap 

Defining the memory mapped base in fmap for example "FLASH@0xff800000
0x80000" for a 8M flash is optional in fmap files. This will also
reflect in the generated fmap_config.h. Fix the assembly cbfs walker
walkcbfs.S for fmap lacking a definition of the flash base.

Change-Id: I96b18f675e625abee503648ffdc6031978a4269a
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55452
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Michał Żygowski <michal.zygowski@3mdeb.com>
This commit is contained in:
Arthur Heymans 2021-06-12 22:33:25 +02:00 committed by Patrick Georgi
parent 30701763e3
commit ddbc771524
1 changed files with 7 additions and 1 deletions
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8
src/arch/x86/walkcbfs.S
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@ -13,6 +13,12 @@
#define CBFS_FILE_STRUCTSIZE (CBFS_FILE_OFFSET + 4)
#if FMAP_SECTION_COREBOOT_START < (0xffffffff - CONFIG_ROM_SIZE + 1)
#define COREBOOT_CBFS_START (0xffffffff - CONFIG_ROM_SIZE + 1 + FMAP_SECTION_COREBOOT_START)
#else
#define COREBOOT_CBFS_START FMAP_SECTION_COREBOOT_START
#endif
.code32
.section .init
.global walkcbfs_asm
@ -26,7 +32,7 @@
walkcbfs_asm:
cld
movl $FMAP_SECTION_COREBOOT_START, %ebx
movl $COREBOOT_CBFS_START, %ebx
/* determine filename length */
mov $0, %eax