59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
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/*
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* This file is part of the coreboot project.
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*
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* Copyright 2013 Google Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; version 2 of
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* the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <console/console.h>
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#include <device/pci_def.h>
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#include <device/pci_ops.h>
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#include <security/vboot/vbnv.h>
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#include <pc80/mc146818rtc.h>
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#include <elog.h>
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#include "pmutil.h"
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#include "rtc.h"
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/* PCI Configuration Space (D31:F0): LPC */
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#if defined(__SIMPLE_DEVICE__)
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#define PCH_LPC_DEV PCI_DEV(0, 0x1f, 0)
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#else
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#define PCH_LPC_DEV dev_find_slot(0, PCI_DEVFN(0x1f, 0))
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#endif
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int rtc_failure(void)
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{
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return !!(pci_read_config8(PCH_LPC_DEV, D31F0_GEN_PMCON_3)
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& RTC_BATTERY_DEAD);
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}
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void sb_rtc_init(void)
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{
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int rtc_failed = rtc_failure();
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if (rtc_failed) {
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if (IS_ENABLED(CONFIG_ELOG))
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elog_add_event(ELOG_TYPE_RTC_RESET);
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pci_update_config8(PCH_LPC_DEV, D31F0_GEN_PMCON_3,
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~RTC_BATTERY_DEAD, 0);
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}
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printk(BIOS_DEBUG, "RTC: failed = 0x%x\n", rtc_failed);
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cmos_init(rtc_failed);
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}
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int vbnv_cmos_failed(void)
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{
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return rtc_failure();
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}
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