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ELOG: Find flash base in FMAP if possible 

Now that we have FMAP support in coreboot use it to find the
offset in flash for ELOG to use.

If coreboot has elog configured with a smaller size then use
that over the FMAP size.  This is because I set aside a 16KB
region in the FMAP but we only use 4KB of it to keep the impact
to boot/resume speed to a minimum.

FMAP: Found "FMAP" version 1.0 at ffe10000.
FMAP: base = 0 size = 800000 #areas = 32
FMAP: area RW_ELOG found
FMAP:   offset: 3f0000
FMAP:   size:   16384 bytes
FMAP: No valid base address, using 0xff800000
ELOG: base=0x003f0000 base_ptr=0xffbf0000
ELOG: MEM @0x00190ad8 FLASH @0xffbf0000
ELOG: areas are 4096 bytes, full threshold 3072, shrink size 1024

Change-Id: I3d826812c0f259d61f41b42797c58dd179f9f1c8
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/1706
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
Duncan Laurie 2012-08-15 13:14:58 -07:00 committed by Stefan Reinauer
parent f1c76ef605
commit 86bf3f518f
2 changed files with 27 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
src/drivers/elog/elog.c
View File

@ -28,7 +28,9 @@
#include <elog.h>
#include "elog_internal.h"
#if CONFIG_ELOG_FLASH_BASE == 0
#if CONFIG_CHROMEOS
#include <vendorcode/google/chromeos/fmap.h>
#elif CONFIG_ELOG_FLASH_BASE == 0
#error "CONFIG_ELOG_FLASH_BASE is invalid"
#endif
#if CONFIG_ELOG_FULL_THRESHOLD >= CONFIG_ELOG_AREA_SIZE
@ -735,6 +737,12 @@ int elog_clear(void)
*/
int elog_init(void)
{
u32 flash_base = CONFIG_ELOG_FLASH_BASE;
int flash_size = CONFIG_ELOG_AREA_SIZE;
#if CONFIG_CHROMEOS
u8 *flash_base_ptr;
#endif
if (elog_initialized)
return 0;
@ -746,9 +754,24 @@ int elog_init(void)
return -1;
}
#if CONFIG_CHROMEOS
/* Find the ELOG base and size in FMAP */
flash_size = find_fmap_entry("RW_ELOG", (void **)&flash_base_ptr);
if (flash_size < 0) {
printk(BIOS_WARNING, "ELOG: Unable to find RW_ELOG in FMAP, "
"using CONFIG_ELOG_FLASH_BASE instead\n");
flash_size = CONFIG_ELOG_AREA_SIZE;
} else {
flash_base = elog_flash_address_to_offset(flash_base_ptr);
/* Use configured size if smaller than FMAP size */
if (flash_size > CONFIG_ELOG_AREA_SIZE)
flash_size = CONFIG_ELOG_AREA_SIZE;
}
#endif
/* Setup descriptors for flash and memory areas */
if (elog_setup_descriptors(CONFIG_ELOG_FLASH_BASE,
CONFIG_ELOG_AREA_SIZE) < 0) {
if (elog_setup_descriptors(flash_base, flash_size) < 0) {
printk(BIOS_ERR, "ELOG: Unable to initialize descriptors\n");
return -1;
}

1
src/vendorcode/google/chromeos/Makefile.inc
View File

@ -25,3 +25,4 @@ romstage-y += vboot.c
ramstage-y += gnvs.c
romstage-y += fmap.c
ramstage-y += fmap.c
smm-y += fmap.c