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coreboot: config to cache ramstage outside CBMEM

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Haswell was the original chipset to store the cache
in another area besides CBMEM. However, it was specific
to the implementation. Instead, provide a generic way
to obtain the location of the ramstage cache. This option
is selected using the CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM
Kconfig option.

BUG=chrome-os-partner:23249
BRANCH=None
TEST=Built and booted with baytrail support. Also built for
     falco successfully.

Change-Id: I70d0940f7a8f73640c92a75fd22588c2c234241b
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/172602
Reviewed-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/4876
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
This commit is contained in:
Aaron Durbin
2013-10-10 20:37:04 -05:00
committed by Aaron Durbin
parent 6ac3405fdf
commit 75e297428f
7 changed files with 213 additions and 119 deletions
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47
src/lib/cbfs.c
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@ -127,53 +127,6 @@ void *cbfs_load_optionrom(struct cbfs_media *media, uint16_t vendor,
#include <rmodule.h>
#include <romstage_handoff.h>
/* When CONFIG_RELOCATABLE_RAMSTAGE is enabled and this file is being compiled
* for the romstage, the rmodule loader is used. */
void __attribute__((weak))
cache_loaded_ramstage(struct romstage_handoff *handoff,
const struct cbmem_entry *ramstage, void *entry_point)
{
uint32_t ramstage_size;
const struct cbmem_entry *entry;
if (handoff == NULL)
return;
ramstage_size = cbmem_entry_size(ramstage);
/* cbmem_entry_add() does a find() before add(). */
entry = cbmem_entry_add(CBMEM_ID_RAMSTAGE_CACHE, ramstage_size);
if (entry == NULL)
return;
/* Keep track of the entry point in the handoff structure. */
handoff->ramstage_entry_point = (uint32_t)entry_point;
memcpy(cbmem_entry_start(entry), cbmem_entry_start(ramstage),
ramstage_size);
}
void * __attribute__((weak))
load_cached_ramstage(struct romstage_handoff *handoff,
const struct cbmem_entry *ramstage)
{
const struct cbmem_entry *entry_cache;
if (handoff == NULL)
return NULL;
entry_cache = cbmem_entry_find(CBMEM_ID_RAMSTAGE_CACHE);
if (entry_cache == NULL)
return NULL;
/* Load the cached ramstage copy into the to-be-run region. */
memcpy(cbmem_entry_start(ramstage), cbmem_entry_start(entry_cache),
cbmem_entry_size(ramstage));
return (void *)handoff->ramstage_entry_point;
}
static void *load_stage_from_cbfs(struct cbfs_media *media, const char *name,
struct romstage_handoff *handoff)
{