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cbfs_spi: Initialize spi_flash when initializing cbfs_cache 

Most devices do not use SPI before they initialize CBMEM. This change
initializes spi_flash in the CBMEM_INIT_HOOK to initialize the postram
cbfs cache so it is not overwritten when boot_device_init is called
later.

BUG=chromium:210230
BRANCH=none
TEST=confirm that the first cbfs access can occur before RAM initialized
and after on panther and jerry.

Change-Id: If3b6efc04082190e81c3773c0d3ce116bb12421f
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 0ab242786a16eba7fb423694f6b266e27d7660ec
Original-Change-Id: I5f884b473e51e6813fdd726bba06b56baf3841b0
Original-Signed-off-by: Mary Ruthven <mruthven@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/314311
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/12601
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Mary Ruthven 2015-11-24 09:43:27 -08:00 committed by Patrick Georgi
parent 5b242f6307
commit a8aef3acbc
3 changed files with 12 additions and 5 deletions
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2
src/include/memlayout.h
View File

@ -82,7 +82,7 @@
#if ENV_ROMSTAGE
#define PRERAM_CBFS_CACHE(addr, size) CBFS_CACHE(addr, size)
#define POSTRAM_CBFS_CACHE(addr, size) \
REGION(dram_cbfs_cache, addr, size, 4)
REGION(postram_cbfs_cache, addr, size, 4)
#elif defined(__PRE_RAM__)
#define PRERAM_CBFS_CACHE(addr, size) CBFS_CACHE(addr, size)
#define POSTRAM_CBFS_CACHE(addr, size) \

6
src/include/symbols.h
View File

@ -41,9 +41,9 @@ extern u8 _stack[];
extern u8 _estack[];
#define _stack_size (_estack - _stack)
extern u8 _dram_cbfs_cache[];
extern u8 _edram_cbfs_cache[];
#define _dram_cbfs_cache_size (_edram_cbfs_cache - _dram_cbfs_cache)
extern u8 _postram_cbfs_cache[];
extern u8 _epostram_cbfs_cache[];
#define _postram_cbfs_cache_size (_epostram_cbfs_cache - _postram_cbfs_cache)
extern u8 _cbfs_cache[];
extern u8 _ecbfs_cache[];

9
src/lib/cbfs_spi.c
View File

@ -45,7 +45,14 @@ static struct mmap_helper_region_device mdev =
static void initialize_mdev(int unused)
{
mmap_helper_device_init(&mdev, _dram_cbfs_cache, _dram_cbfs_cache_size);
/*
* Call boot_device_init() to ensure spi_flash is initialized before
* backing mdev with postram cache. This prevents the mdev backing from
* being overwritten if spi_flash was not accessed before dram was up.
*/
boot_device_init();
mmap_helper_device_init(&mdev, _postram_cbfs_cache,
_postram_cbfs_cache_size);
}
ROMSTAGE_CBMEM_INIT_HOOK(initialize_mdev);