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elog: Get rid of the staging_header variable. 

The header is at the start of the log. There's no reason to either keep a
seperate pointer to it, or to keep a copy of it in some other bit of memory.

Built and booted on Link and used 'mosys eventlog list' to list the
contents of the log. Ran

for x in $(seq 1 2000); do
  cat elog.event.kernel_clean > /sys/firmware/gsmi/append_to_eventlog;
done

And ran mosys eventlog list again to verify that the log had been shrunk
correctly.

Change-Id: I2afcd52c0ce5bbb662ac56f2895cdbea28d5c2ce
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/49304
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/4239
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
Gabe Black 2013-04-23 19:36:01 -07:00 committed by Alexandru Gagniuc
parent 60f820835f
commit e62e0369d5
2 changed files with 7 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
src/drivers/elog/elog.c
View File

@ -376,7 +376,7 @@ static void elog_validate_and_fill(struct elog_descriptor *elog)
elog->area_state = ELOG_AREA_HAS_CONTENT;
/* Validate the header */
if (!elog_is_header_valid(elog->staging_header)) {
if (!elog_is_header_valid(elog_get_header(elog))) {
elog->header_state = ELOG_HEADER_INVALID;
return;
}
@ -390,8 +390,7 @@ static void elog_validate_and_fill(struct elog_descriptor *elog)
*/
static void elog_init_descriptor(struct elog_descriptor *elog,
elog_descriptor_type type,
u8 *buffer, u32 size,
struct elog_header *header)
u8 *buffer, u32 size)
{
elog_debug("elog_init_descriptor(type=%u buffer=0x%p size=%u)\n",
type, buffer, size);
@ -407,10 +406,6 @@ static void elog_init_descriptor(struct elog_descriptor *elog,
if (type == ELOG_DESCRIPTOR_FLASH)
elog_spi->read(elog_spi, elog->flash_base, size, buffer);
/* Get staging header from backing store */
elog->staging_header = header;
memcpy(header, buffer, sizeof(struct elog_header));
/* Data starts immediately after header */
elog->data = &buffer[sizeof(struct elog_header)];
elog->data_size = size - sizeof(struct elog_header);
@ -430,7 +425,7 @@ static void elog_reinit_descriptor(struct elog_descriptor *elog)
{
elog_debug("elog_reinit_descriptor()\n");
elog_init_descriptor(elog, elog->type, elog->backing_store,
elog->total_size, elog->staging_header);
elog->total_size);
}
/*
@ -438,7 +433,6 @@ static void elog_reinit_descriptor(struct elog_descriptor *elog)
*/
static int elog_setup_descriptors(u32 flash_base, u32 area_size)
{
struct elog_header *staging_header;
u8 *area;
elog_debug("elog_setup_descriptors(base=0x%08x size=%u)\n",
@ -450,20 +444,14 @@ static int elog_setup_descriptors(u32 flash_base, u32 area_size)
return -1;
}
staging_header = malloc(sizeof(struct elog_header));
if (!staging_header) {
printk(BIOS_ERR, "ELOG: Unable to allocate header\n");
return -1;
}
area = malloc(area_size);
if (!area) {
printk(BIOS_ERR, "ELOG: Unable to determine flash address\n");
printk(BIOS_ERR, "ELOG: Unable to allocate backing store\n");
return -1;
}
elog_get_flash()->flash_base = flash_base;
elog_init_descriptor(elog_get_flash(), ELOG_DESCRIPTOR_FLASH,
area, area_size, staging_header);
area, area_size);
/* Initialize the memory area to look like a cleared flash area */
area = malloc(area_size);
@ -472,8 +460,7 @@ static int elog_setup_descriptors(u32 flash_base, u32 area_size)
return -1;
}
memset(area, ELOG_TYPE_EOL, area_size);
elog_init_descriptor(elog_get_mem(), ELOG_DESCRIPTOR_MEMORY,
area, area_size, (struct elog_header *)area);
elog_init_descriptor(elog_get_mem(), ELOG_DESCRIPTOR_MEMORY,area, area_size);
return 0;
}
@ -500,7 +487,7 @@ static void elog_prepare_empty(struct elog_descriptor *elog,
return;
/* Write out the header */
header = elog->staging_header;
header = elog_get_header(elog);
header->magic = ELOG_SIGNATURE;
header->version = ELOG_VERSION;
header->header_size = sizeof(struct elog_header);

1
src/drivers/elog/elog_internal.h
View File

@ -77,7 +77,6 @@ struct elog_descriptor {
elog_area_state area_state;
elog_header_state header_state;
elog_event_buffer_state event_buffer_state;
struct elog_header *staging_header;
void *backing_store;
u8 *data;
u32 flash_base;