From e9b3fd1d5da628c7207701ead053a318235c86b3 Mon Sep 17 00:00:00 2001 From: Keith Hui Date: Sun, 12 Jan 2020 18:41:26 -0500 Subject: [PATCH] intel/i440bx: Resolve long standing raminit TODOs Drop DRAMT write as it's only rewriting the power on default. PMCR write is required. Update comment on its purpose and move to end of sdram_enable(). Change-Id: I62e8b2531f0f297ffb7db440db89ffa65771b7d5 Signed-off-by: Keith Hui Reviewed-on: https://review.coreboot.org/c/coreboot/+/38383 Tested-by: build bot (Jenkins) Reviewed-by: Angel Pons --- src/northbridge/intel/i440bx/raminit.c | 14 ++------------ 1 file changed, 2 insertions(+), 12 deletions(-) diff --git a/src/northbridge/intel/i440bx/raminit.c b/src/northbridge/intel/i440bx/raminit.c index d5c23cf165..0a864e864a 100644 --- a/src/northbridge/intel/i440bx/raminit.c +++ b/src/northbridge/intel/i440bx/raminit.c @@ -357,10 +357,7 @@ static const u8 register_values[] = { * 1 = Enable * 0 = Disable */ - /* Enable normal refresh and the gated clock. */ - // TODO: Only do this later? - // PMCR, 0x00, 0x14, - PMCR, 0x00, 0x00, + /* PMCR will be set later. */ /* Enable SCRR.SRRAEN and let BX choose the SRR. */ SCRR + 1, 0x00, 0x10, @@ -985,13 +982,6 @@ static void sdram_set_spd_registers(void) /* Setup DRAM buffer strength. */ set_dram_buffer_strength(); - - /* TODO: Set PMCR? */ - // pci_write_config8(NB, PMCR, 0x14); - pci_write_config8(NB, PMCR, 0x10); - - /* TODO: This is for EDO memory only. */ - pci_write_config8(NB, DRAMT, 0x03); } static void sdram_enable(void) @@ -1030,7 +1020,7 @@ static void sdram_enable(void) /* 6. Finally enable refresh. */ PRINT_DEBUG("RAM Enable 6: Enable refresh\n"); - // pci_write_config8(NB, PMCR, 0x10); + pci_write_config8(NB, PMCR, 0x10); spd_enable_refresh(); udelay(1);