c021ffee45
Change-Id: I949ff7de072e5e0753d9c8ff0bf98abfca25798b Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/16637 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com>
60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2010 Advanced Micro Devices, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of 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 <stdint.h>
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#include <arch/io.h>
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#include <arch/acpi.h>
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#include <cbmem.h>
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#include "SBPLATFORM.h"
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int acpi_get_sleep_type(void)
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{
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u16 tmp = inw(PM1_CNT_BLK_ADDRESS);
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tmp = ((tmp & (7 << 10)) >> 10);
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return (int)tmp;
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}
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#if IS_ENABLED(CONFIG_LATE_CBMEM_INIT)
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#ifndef __PRE_RAM__
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void backup_top_of_ram(uint64_t ramtop)
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{
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u32 dword = (u32) ramtop;
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int nvram_pos = 0xf8, i; /* temp */
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for (i = 0; i < 4; i++) {
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outb(nvram_pos, BIOSRAM_INDEX);
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outb((dword >>(8 * i)) & 0xff , BIOSRAM_DATA);
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nvram_pos++;
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}
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}
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#endif
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unsigned long get_top_of_ram(void)
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{
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u32 xdata = 0;
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int xnvram_pos = 0xf8, xi;
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if (acpi_get_sleep_type() != 3)
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return 0;
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for (xi = 0; xi < 4; xi++) {
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outb(xnvram_pos, BIOSRAM_INDEX);
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xdata &= ~(0xff << (xi * 8));
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xdata |= inb(BIOSRAM_DATA) << (xi *8);
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xnvram_pos++;
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}
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return (unsigned long) xdata;
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}
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#endif
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