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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2012 The Chromium OS Authors. All rights reserved.
*
* 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 <arch/io.h>
#include <console/post_codes.h>
#include <cpu/x86/smm.h>
#include "pch.h"
#include <spi-generic.h>
void intel_pch_finalize_smm(void)
{
u16 tco1_cnt;
u16 pmbase;
if (IS_ENABLED(CONFIG_LOCK_SPI_FLASH_RO) ||
IS_ENABLED(CONFIG_LOCK_SPI_FLASH_NO_ACCESS)) {
/* Copy flash regions from FREG0-4 to PR0-4
and enable write protection bit31 */
int i;
u32 lockmask = (1 << 31);
if (IS_ENABLED(CONFIG_LOCK_SPI_FLASH_NO_ACCESS))
lockmask |= (1 << 15);
for (i = 0; i < 20; i += 4)
RCBA32(0x3874 + i) = RCBA32(0x3854 + i) | lockmask;
}
/* Set SPI opcode menu */
RCBA16(0x3894) = SPI_OPPREFIX;
RCBA16(0x3896) = SPI_OPTYPE;
RCBA32(0x3898) = SPI_OPMENU_LOWER;
RCBA32(0x389c) = SPI_OPMENU_UPPER;
/* Lock SPIBAR */
RCBA32_OR(0x3804, (1 << 15));
#if IS_ENABLED(CONFIG_SPI_FLASH_SMM)
/* Re-init SPI driver to handle locked BAR */
spi_init();
#endif
/* TCLOCKDN: TC Lockdown */
RCBA32_OR(0x0050, (1 << 31));
/* BIOS Interface Lockdown */
RCBA32_OR(0x3410, (1 << 0));
/* Function Disable SUS Well Lockdown */
RCBA_AND_OR(8, 0x3420, ~0U, (1 << 7));
/* Global SMI Lock */
pci_or_config16(PCH_LPC_DEV, GEN_PMCON_1, 1 << 4);
/* GEN_PMCON Lock */
pci_or_config8(PCH_LPC_DEV, GEN_PMCON_LOCK, (1 << 1) | (1 << 2));
/* ETR3: CF9GR Lockdown */
pci_update_config32(PCH_LPC_DEV, ETR3, ~ETR3_CF9GR, ETR3_CF9LOCK);
/* R/WO registers */
RCBA32(0x21a4) = RCBA32(0x21a4);
pci_write_config32(PCI_DEV(0, 27, 0), 0x74,
pci_read_config32(PCI_DEV(0, 27, 0), 0x74));
/* TCO_Lock */
pmbase = smm_get_pmbase();
tco1_cnt = inw(pmbase + TCO1_CNT);
tco1_cnt |= TCO_LOCK;
outw(tco1_cnt, pmbase + TCO1_CNT);
/* Indicate finalize step with post code */
outb(POST_OS_BOOT, 0x80);
}
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