From 41114650d0aa508f5629f32b1d78683eae2974ce Mon Sep 17 00:00:00 2001 From: Arthur Heymans Date: Wed, 12 Apr 2017 00:10:38 +0200 Subject: sb/intel/i82801jx: Add function to detect s3 resume File copied from i82801gx. Change-Id: I107087b6448f18b6a5ae21c2ae0392c057dd23b2 Signed-off-by: Arthur Heymans Reviewed-on: https://review.coreboot.org/19252 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel Reviewed-by: Martin Roth --- src/southbridge/intel/i82801jx/early_lpc.c | 54 ++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 src/southbridge/intel/i82801jx/early_lpc.c (limited to 'src/southbridge/intel/i82801jx/early_lpc.c') diff --git a/src/southbridge/intel/i82801jx/early_lpc.c b/src/southbridge/intel/i82801jx/early_lpc.c new file mode 100644 index 0000000000..74f0ee2920 --- /dev/null +++ b/src/southbridge/intel/i82801jx/early_lpc.c @@ -0,0 +1,54 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008-2009 coresystems GmbH + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; version 2 of + * the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include "i82801jx.h" + +uint64_t get_initial_timestamp(void) +{ + tsc_t base_time = { + .lo = pci_read_config32(PCI_DEV(0, 0x00, 0), 0xdc), + .hi = pci_read_config32(PCI_DEV(0, 0x1f, 2), 0xd0) + }; + return tsc_to_uint64(base_time); +} + +int southbridge_detect_s3_resume(void) +{ + u32 reg32; + + /* Read PM1_CNT */ + reg32 = inl(DEFAULT_PMBASE + 0x04); + printk(BIOS_DEBUG, "PM1_CNT: %08x\n", reg32); + if (((reg32 >> 10) & 7) == 5) { + if (!acpi_s3_resume_allowed()) { + printk(BIOS_DEBUG, "Resume from S3 detected, but disabled.\n"); + } else { + printk(BIOS_DEBUG, "Resume from S3 detected.\n"); + /* Clear SLP_TYPE. This will break stage2 but + * we care for that when we get there. + */ + outl(reg32 & ~(7 << 10), DEFAULT_PMBASE + 0x04); + return 1; + } + } + + return 0; +} -- cgit v1.2.3