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x86: Use struct mrc_region to describe a mrc region

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Currently struct fmap_entry is used to describe a mrc region.
However this structure contains some other fields that are not
related to mrc cache and causes confusion. Besides, it does not
include a base address field to store SPI flash's base address.
Instead in the mrccache.c it tries to use CONFIG_ROM_SIZE to
calculate the SPI flash base address, which unfortunately is
not 100% correct as CONFIG_ROM_SIZE may not match the whole
SPI flash size.

Define a new struct mrc_region and use it instead.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2015-10-11 21:37:41 -07:00 committed by Simon Glass
parent 42913a1c7a
commit 4b9f6a669e
3 changed files with 27 additions and 15 deletions
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2
arch/x86/cpu/ivybridge/sdram.c
View file

@ -138,7 +138,7 @@ static int read_seed_from_cmos(struct pei_data *pei_data)
static int prepare_mrc_cache(struct pei_data *pei_data)
{
struct mrc_data_container *mrc_cache;
struct fmap_entry entry;
struct mrc_region entry;
int ret;
ret = read_seed_from_cmos(pei_data);

13
arch/x86/include/asm/mrccache.h
View file

@ -22,7 +22,12 @@ struct __packed mrc_data_container {
u8 data[0]; /* Variable size, platform/run time dependent */
};
struct fmap_entry;
struct mrc_region {
u32 base;
u32 offset;
u32 length;
};
struct udevice;
/**
@ -34,7 +39,7 @@ struct udevice;
* @entry: Position and size of MRC cache in SPI flash
* @return pointer to latest record, or NULL if none
*/
struct mrc_data_container *mrccache_find_current(struct fmap_entry *entry);
struct mrc_data_container *mrccache_find_current(struct mrc_region *entry);
/**
* mrccache_update() - update the MRC cache with a new record
@ -48,7 +53,7 @@ struct mrc_data_container *mrccache_find_current(struct fmap_entry *entry);
* @return 0 if updated, -EEXIST if the record is the same as the latest
* record, -EINVAL if the record is not valid, other error if SPI write failed
*/
int mrccache_update(struct udevice *sf, struct fmap_entry *entry,
int mrccache_update(struct udevice *sf, struct mrc_region *entry,
struct mrc_data_container *cur);
/**
@ -87,7 +92,7 @@ int mrccache_reserve(void);
* tree, -EINVAL if MRC region properties format is incorrect, other error
* if SPI flash probe failed.
*/
int mrccache_get_region(struct udevice **devp, struct fmap_entry *entry);
int mrccache_get_region(struct udevice **devp, struct mrc_region *entry);
/**
* mrccache_save() - save MRC data to the SPI flash

27
arch/x86/lib/mrccache.c
View file

@ -40,13 +40,13 @@ static int is_mrc_cache(struct mrc_data_container *cache)
return cache && (cache->signature == MRC_DATA_SIGNATURE);
}
struct mrc_data_container *mrccache_find_current(struct fmap_entry *entry)
struct mrc_data_container *mrccache_find_current(struct mrc_region *entry)
{
struct mrc_data_container *cache, *next;
ulong base_addr, end_addr;
uint id;
base_addr = (1ULL << 32) - CONFIG_ROM_SIZE + entry->offset;
base_addr = entry->base + entry->offset;
end_addr = base_addr + entry->length;
cache = NULL;
@ -85,12 +85,12 @@ struct mrc_data_container *mrccache_find_current(struct fmap_entry *entry)
*
* @return next cache entry if found, NULL if we got to the end
*/
static struct mrc_data_container *find_next_mrc_cache(struct fmap_entry *entry,
static struct mrc_data_container *find_next_mrc_cache(struct mrc_region *entry,
struct mrc_data_container *cache)
{
ulong base_addr, end_addr;
base_addr = (1ULL << 32) - CONFIG_ROM_SIZE + entry->offset;
base_addr = entry->base + entry->offset;
end_addr = base_addr + entry->length;
cache = next_mrc_block(cache);
@ -106,7 +106,7 @@ static struct mrc_data_container *find_next_mrc_cache(struct fmap_entry *entry,
return cache;
}
int mrccache_update(struct udevice *sf, struct fmap_entry *entry,
int mrccache_update(struct udevice *sf, struct mrc_region *entry,
struct mrc_data_container *cur)
{
struct mrc_data_container *cache;
@ -118,7 +118,7 @@ int mrccache_update(struct udevice *sf, struct fmap_entry *entry,
return -EINVAL;
/* Find the last used block */
base_addr = (1ULL << 32) - CONFIG_ROM_SIZE + entry->offset;
base_addr = entry->base + entry->offset;
debug("Updating MRC cache data\n");
cache = mrccache_find_current(entry);
if (cache && (cache->data_size == cur->data_size) &&
@ -189,10 +189,11 @@ int mrccache_reserve(void)
return 0;
}
int mrccache_get_region(struct udevice **devp, struct fmap_entry *entry)
int mrccache_get_region(struct udevice **devp, struct mrc_region *entry)
{
const void *blob = gd->fdt_blob;
int node, mrc_node;
u32 reg[2];
int ret;
/* Find the flash chip within the SPI controller node */
@ -200,13 +201,19 @@ int mrccache_get_region(struct udevice **devp, struct fmap_entry *entry)
if (node < 0)
return -ENOENT;
if (fdtdec_get_int_array(blob, node, "memory-map", reg, 2))
return -FDT_ERR_NOTFOUND;
entry->base = reg[0];
/* Find the place where we put the MRC cache */
mrc_node = fdt_subnode_offset(blob, node, "rw-mrc-cache");
if (mrc_node < 0)
return -EPERM;
if (fdtdec_read_fmap_entry(blob, mrc_node, "rm-mrc-cache", entry))
return -EINVAL;
if (fdtdec_get_int_array(blob, mrc_node, "reg", reg, 2))
return -FDT_ERR_NOTFOUND;
entry->offset = reg[0];
entry->length = reg[1];
if (devp) {
ret = uclass_get_device_by_of_offset(UCLASS_SPI_FLASH, node,
@ -222,7 +229,7 @@ int mrccache_get_region(struct udevice **devp, struct fmap_entry *entry)
int mrccache_save(void)
{
struct mrc_data_container *data;
struct fmap_entry entry;
struct mrc_region entry;
struct udevice *sf;
int ret;