Zheng Bao (zheng.bao@amd.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2306
-gerrit
commit 7c9d9567b0c0e3f4b7aaa7ae70612bc4b7cacc50 Author: Zheng Bao fishbaozi@gmail.com Date: Sun Feb 17 17:27:46 2013 +0800
AMD S3: Program the flash in a bigger data packet
According to spi.c in src/southbridge/amd/agesa/hudson readwrite = (bytesin + readoffby1) << 4 | bytesout; We can see that Hudson limits the SPI programming data packet size as 15.
We used to write data to SPI in dword mode. It didn't take full advantage of the data packet size. We need to leverage that to speed up programming time.
Change-Id: I615e3c8e754e58702247bc26cfffbedaf5827ea8 Signed-off-by: Zheng Bao zheng.bao@amd.com Signed-off-by: Zheng Bao fishbaozi@gmail.com --- src/cpu/amd/agesa/s3_resume.c | 56 +++++++++++++++++-------------------------- 1 file changed, 22 insertions(+), 34 deletions(-)
diff --git a/src/cpu/amd/agesa/s3_resume.c b/src/cpu/amd/agesa/s3_resume.c index ee9d7c9..278c1da 100644 --- a/src/cpu/amd/agesa/s3_resume.c +++ b/src/cpu/amd/agesa/s3_resume.c @@ -178,29 +178,21 @@ void OemAgesaSaveMtrr(void) /* Fixed MTRRs */ msr_data = rdmsr(0x250);
- flash->write(flash, nvram_pos, 4, &msr_data.lo); - nvram_pos += 4; - flash->write(flash, nvram_pos, 4, &msr_data.hi); - nvram_pos += 4; + flash->write(flash, nvram_pos, 8, &msr_data); + nvram_pos += 8;
msr_data = rdmsr(0x258); - flash->write(flash, nvram_pos, 4, &msr_data.lo); - nvram_pos += 4; - flash->write(flash, nvram_pos, 4, &msr_data.hi); - nvram_pos += 4; + flash->write(flash, nvram_pos, 8, &msr_data); + nvram_pos += 8;
msr_data = rdmsr(0x259); - flash->write(flash, nvram_pos, 4, &msr_data.lo); - nvram_pos += 4; - flash->write(flash, nvram_pos, 4, &msr_data.hi); - nvram_pos += 4; + flash->write(flash, nvram_pos, 8, &msr_data); + nvram_pos += 8;
for (i = 0x268; i < 0x270; i++) { msr_data = rdmsr(i); - flash->write(flash, nvram_pos, 4, &msr_data.lo); - nvram_pos += 4; - flash->write(flash, nvram_pos, 4, &msr_data.hi); - nvram_pos += 4; + flash->write(flash, nvram_pos, 8, &msr_data); + nvram_pos += 8; }
/* Disable access to AMD RdDram and WrDram extension bits */ @@ -211,32 +203,24 @@ void OemAgesaSaveMtrr(void) /* Variable MTRRs */ for (i = 0x200; i < 0x210; i++) { msr_data = rdmsr(i); - flash->write(flash, nvram_pos, 4, &msr_data.lo); - nvram_pos += 4; - flash->write(flash, nvram_pos, 4, &msr_data.hi); - nvram_pos += 4; + flash->write(flash, nvram_pos, 8, &msr_data); + nvram_pos += 8; }
/* SYS_CFG */ msr_data = rdmsr(0xC0010010); - flash->write(flash, nvram_pos, 4, &msr_data.lo); - nvram_pos += 4; - flash->write(flash, nvram_pos, 4, &msr_data.hi); - nvram_pos += 4; + flash->write(flash, nvram_pos, 8, &msr_data); + nvram_pos += 8;
/* TOM */ msr_data = rdmsr(0xC001001A); - flash->write(flash, nvram_pos, 4, &msr_data.lo); - nvram_pos += 4; - flash->write(flash, nvram_pos, 4, &msr_data.hi); - nvram_pos += 4; + flash->write(flash, nvram_pos, 8, &msr_data); + nvram_pos += 8;
/* TOM2 */ msr_data = rdmsr(0xC001001D); - flash->write(flash, nvram_pos, 4, &msr_data.lo); - nvram_pos += 4; - flash->write(flash, nvram_pos, 4, &msr_data.hi); - nvram_pos += 4; + flash->write(flash, nvram_pos, 8, &msr_data); + nvram_pos += 8;
flash->spi->rw = SPI_WRITE_FLAG; spi_release_bus(flash->spi); @@ -290,13 +274,17 @@ u32 OemAgesaSaveS3Info(S3_DATA_TYPE S3DataType, u32 DataSize, void *Data) flash->erase(flash, S3_DATA_VOLATILE_POS, S3_DATA_VOLATILE_SIZE); }
+#ifndef SPI_DATA_PACKET_SIZE +#define SPI_DATA_PACKET_SIZE 0xF +#endif 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 - SPI_DATA_PACKET_SIZE; nvram_pos += SPI_DATA_PACKET_SIZE) { 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, SPI_DATA_PACKET_SIZE, (u8 *)(Data + nvram_pos)); } + flash->write(flash, nvram_pos + pos + 4, DataSize % SPI_DATA_PACKET_SIZE, (u8 *)(Data + nvram_pos));
flash->spi->rw = SPI_WRITE_FLAG; spi_release_bus(flash->spi);