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AMD S3 resume: Add framwork to write bigger data 

This patch is based on 'AMD S3: Program the flash in a bigger data packet'[1]

Some AMD south bridge can write bigger data when saving S3 info.
In this patch, I use config 'AMD_SB_SPI_TX_LEN' to contral data size.
AMD_SB_SPI_TX_LEN is defined in 'src/southbridge/amd/Kconfig'
and then can be overridden in the Kconfig for specific
southbridges that support larger size.

I have tested on AMD Parmer and Thatcher. We will release a new board
whose south bridge can transfer more than 4 bytes each time.

[1] http://review.coreboot.org/#/c/2306/

Change-Id: Id984955d46eae487e39d45979f1a90054aa9f54b
Signed-off-by: Siyuan Wang <SiYuan.Wang@amd.com>
Signed-off-by: Siyuan Wang <wangsiyuanbuaa@gmail.com>
Reviewed-on: http://review.coreboot.org/3413
Tested-by: build bot (Jenkins)
Reviewed-by: Bruce Griffith <Bruce.Griffith@se-eng.com>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
Siyuan Wang 2013-06-08 10:25:06 +08:00 committed by Ronald G. Minnich
parent bc2c9efd56
commit 0d8d482f63
2 changed files with 12 additions and 2 deletions
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11
src/cpu/amd/agesa/s3_resume.c
View File

@ -152,10 +152,16 @@ void write_mtrr(struct spi_flash *flash, u32 *p_nvram_pos, unsigned idx)
{
msr_t msr_data;
msr_data = rdmsr(idx);
#if CONFIG_AMD_SB_SPI_TX_LEN >= 8
flash->write(flash, *p_nvram_pos, 8, &msr_data);
*p_nvram_pos += 8;
#else
flash->write(flash, *p_nvram_pos, 4, &msr_data.lo);
*p_nvram_pos += 4;
flash->write(flash, *p_nvram_pos, 4, &msr_data.hi);
*p_nvram_pos += 4;
#endif
}
#endif
@ -264,10 +270,11 @@ u32 OemAgesaSaveS3Info(S3_DATA_TYPE S3DataType, u32 DataSize, void *Data)
nvram_pos = 0;
flash->write(flash, nvram_pos + pos, sizeof(DataSize), &DataSize);
for (nvram_pos = 0; nvram_pos < DataSize; nvram_pos += 4) {
for (nvram_pos = 0; nvram_pos < DataSize - CONFIG_AMD_SB_SPI_TX_LEN; nvram_pos += CONFIG_AMD_SB_SPI_TX_LEN) {
data = *(u32 *) (Data + nvram_pos);
flash->write(flash, nvram_pos + pos + 4, sizeof(u32), (u32 *)(Data + nvram_pos));
flash->write(flash, nvram_pos + pos + 4, CONFIG_AMD_SB_SPI_TX_LEN, (u8 *)(Data + nvram_pos));
}
flash->write(flash, nvram_pos + pos + 4, DataSize % CONFIG_AMD_SB_SPI_TX_LEN, (u8 *)(Data + nvram_pos));
flash->spi->rw = SPI_WRITE_FLAG;
spi_release_bus(flash->spi);

3
src/southbridge/amd/Kconfig
View File

@ -18,3 +18,6 @@ source src/southbridge/amd/sr5650/Kconfig
config SPI_FLASH
bool
default y if HAVE_ACPI_RESUME && CPU_AMD_AGESA
config AMD_SB_SPI_TX_LEN
int
default 4