From d1cb0eecd130cb4259ce9fedb32ebcd9ada0d4b7 Mon Sep 17 00:00:00 2001 From: Stefan Reinauer Date: Sat, 4 Jun 2011 10:37:35 -0700 Subject: sb800: move spi prefetch and fast read mode to sb bootblock. So we don't waste time on the first cbfs scan. Signed-off-by: Stefan Reinauer Signed-off-by: Patrick Georgi [adapt persimmon with the same change, and work around romcc bug in bootblock code: it doesn't like MEMACCESS[idx] |= value;] Change-Id: Ic4d0e53d3102be0de0bd18b1b8b29c500bd6d997 Reviewed-on: http://review.coreboot.org/9 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer Reviewed-by: Marc Jones --- src/southbridge/amd/cimx_wrapper/sb800/bootblock.c | 37 ++++++++++++++++++++-- 1 file changed, 34 insertions(+), 3 deletions(-) (limited to 'src/southbridge') diff --git a/src/southbridge/amd/cimx_wrapper/sb800/bootblock.c b/src/southbridge/amd/cimx_wrapper/sb800/bootblock.c index 9d8a349c6e..aaec03cbea 100644 --- a/src/southbridge/amd/cimx_wrapper/sb800/bootblock.c +++ b/src/southbridge/amd/cimx_wrapper/sb800/bootblock.c @@ -20,9 +20,9 @@ #include #include -static void sb800_enable_rom(void) +static void enable_rom(void) { - u32 word; + u16 word; u32 dword; device_t dev; @@ -56,8 +56,39 @@ static void sb800_enable_rom(void) pci_io_write_config16(dev, 0x6c, word); } +static void enable_prefetch(void) +{ + u32 dword; + device_t dev = PCI_DEV(0, 0x14, 0x03); + + /* Enable PrefetchEnSPIFromHost */ + dword = pci_io_read_config32(dev, 0xb8); + pci_io_write_config32(dev, 0xb8, dword | (1 << 24)); +} + +static void enable_spi_fast_mode(void) +{ + u8 byte; + u32 dword; + device_t dev = PCI_DEV(0, 0x14, 0x03); + + // set temp MMIO base + volatile u32 *spi_base = (void *)0xa0000000; + u32 save = pci_io_read_config32(dev, 0xa0); + pci_io_write_config32(dev, 0xa0, (u32) spi_base | 2); + + // early enable of SPI 33 MHz fast mode read + byte = spi_base[3]; + spi_base[3] = (byte & ~(3 << 14)) | (1 << 14); + spi_base[0] = spi_base[0] | (1 << 18); // fast read enable + + pci_io_write_config32(dev, 0xa0, save); +} + static void bootblock_southbridge_init(void) { /* Setup the rom access for 2M */ - sb800_enable_rom(); + enable_rom(); + enable_prefetch(); + enable_spi_fast_mode(); } -- cgit v1.2.3