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arch/x86: cache postcar in stage cache 

Stash and reload postcar stage in the stage cache for increased
S3 resume speed. It's impact is small (2 ms or so), but there's
no need to go to the boot media on resume to reload something
that was already loaded. This aligns with the same paths we take
on ramstage as well.

Change-Id: I4313794826120853163c7366e81346858747ed0a
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/17649
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
This commit is contained in:
Aaron Durbin 2016-11-29 15:52:08 -06:00
parent afe8aeed81
commit d008413a3c
2 changed files with 22 additions and 7 deletions
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28
src/arch/x86/postcar_loader.c
View File

@ -20,6 +20,8 @@
#include <cpu/x86/mtrr.h>
#include <program_loading.h>
#include <rmodule.h>
#include <romstage_handoff.h>
#include <stage_cache.h>
static inline void stack_push(struct postcar_frame *pcf, uint32_t val)
{
@ -110,18 +112,14 @@ void *postcar_commit_mtrrs(struct postcar_frame *pcf)
return (void *) pcf->stack;
}
void run_postcar_phase(struct postcar_frame *pcf)
static void load_postcar_cbfs(struct prog *prog, struct postcar_frame *pcf)
{
struct prog prog =
PROG_INIT(PROG_UNKNOWN, CONFIG_CBFS_PREFIX "/postcar");
struct rmod_stage_load rsl = {
.cbmem_id = CBMEM_ID_AFTER_CAR,
.prog = &prog,
.prog = prog,
};
postcar_commit_mtrrs(pcf);
if (prog_locate(&prog))
if (prog_locate(prog))
die("Failed to locate after CAR program.\n");
if (rmodule_stage_load(&rsl))
die("Failed to load after CAR program.\n");
@ -139,5 +137,21 @@ void run_postcar_phase(struct postcar_frame *pcf)
prog_segment_loaded((uintptr_t)rsl.params, sizeof(uintptr_t),
SEG_FINAL);
if (!IS_ENABLED(CONFIG_NO_STAGE_CACHE))
stage_cache_add(STAGE_POSTCAR, prog);
}
void run_postcar_phase(struct postcar_frame *pcf)
{
struct prog prog =
PROG_INIT(PROG_UNKNOWN, CONFIG_CBFS_PREFIX "/postcar");
postcar_commit_mtrrs(pcf);
if (!IS_ENABLED(CONFIG_NO_STAGE_CACHE) && romstage_handoff_is_resume())
stage_cache_load_stage(STAGE_POSTCAR, &prog);
else
load_postcar_cbfs(&prog, pcf);
prog_run(&prog);
}

1
src/include/stage_cache.h
View File

@ -23,6 +23,7 @@
enum {
STAGE_RAMSTAGE,
STAGE_REFCODE,
STAGE_POSTCAR,
};
/* Cache the loaded stage provided according to the parameters. */