From 7e8c8e92bb7c754a759b7f3bf955f6fd95d44d86 Mon Sep 17 00:00:00 2001 From: Stefan Reinauer Date: Tue, 4 Sep 2012 10:59:29 -0700 Subject: Add PCIe init and NMode flag to PEI data structure The IvyBridge reference code does some slow and extensive PCIe init that we do not need on Link. Hence, add a flag to disable/enable running that init code from coreboot. NMode was used during bringup. We'll switch the setting back to auto, to let MRC decide the right thing. Change-Id: Ia989bb9ea079aadfeb41dc3029b7c2c623e84760 Signed-off-by: Stefan Reinauer Reviewed-on: http://review.coreboot.org/1826 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth Reviewed-by: Ronald G. Minnich --- src/northbridge/intel/sandybridge/pei_data.h | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) (limited to 'src/northbridge/intel/sandybridge') diff --git a/src/northbridge/intel/sandybridge/pei_data.h b/src/northbridge/intel/sandybridge/pei_data.h index cabda3fea4..8c907c1db8 100644 --- a/src/northbridge/intel/sandybridge/pei_data.h +++ b/src/northbridge/intel/sandybridge/pei_data.h @@ -31,7 +31,7 @@ #define PEI_DATA_H typedef void (*tx_byte_func)(unsigned char byte); -#define PEI_VERSION 3 +#define PEI_VERSION 4 struct pei_data { uint32_t pei_version; @@ -99,6 +99,17 @@ struct pei_data uint8_t spd_data[4][256]; tx_byte_func tx_byte; int ddr3lv_support; + /* pcie_init needs to be set to 1 to have the system agent initialize + * PCIe. Note: This should only be required if your system has Gen3 devices + * and it will increase your boot time by at least 100ms. + */ + int pcie_init; + /* N mode functionality. Leave this setting at 0. + * 0 Auto + * 1 1N + * 2 2N + */ + int nmode; } __attribute__((packed)); #endif -- cgit v1.2.3