From f1c8ede1a5bcf26f938b3f5a8cfefa8acd156505 Mon Sep 17 00:00:00 2001 From: Arthur Heymans Date: Tue, 17 Oct 2017 22:13:43 +0200 Subject: sb/intel/i82801ix: fetch initial timestamp in bootblock TESTED on Thinkpad x200 Change-Id: I3cd286709f8734793dc6ae303215433eff29d25b Signed-off-by: Arthur Heymans Reviewed-on: https://review.coreboot.org/22077 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth --- src/southbridge/intel/i82801ix/bootblock.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'src/southbridge/intel/i82801ix/bootblock.c') diff --git a/src/southbridge/intel/i82801ix/bootblock.c b/src/southbridge/intel/i82801ix/bootblock.c index 6252712eba..bb025b0eae 100644 --- a/src/southbridge/intel/i82801ix/bootblock.c +++ b/src/southbridge/intel/i82801ix/bootblock.c @@ -14,6 +14,19 @@ */ #include +#include + +static void store_initial_timestamp(void) +{ + /* + * We have two 32bit scratchpad registers available: + * D0:F0 0xdc (SKPAD) + * D31:F2 0xd0 (SATA SP) + */ + tsc_t tsc = rdtsc(); + pci_write_config32(PCI_DEV(0, 0x00, 0), 0xdc, tsc.lo); + pci_write_config32(PCI_DEV(0, 0x1f, 2), 0xd0, tsc.hi); +} static void enable_spi_prefetch(void) { @@ -30,5 +43,6 @@ static void enable_spi_prefetch(void) static void bootblock_southbridge_init(void) { + store_initial_timestamp(); enable_spi_prefetch(); } -- cgit v1.2.3