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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2011 Google Inc.
* Copyright (C) 2013-2014 Sage Electronic Engineering LLC.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*/
#include <stdint.h>
#include <arch/cpu.h>
#include <cpu/x86/cache.h>
#include <cpu/x86/msr.h>
#include <cpu/x86/mtrr.h>
#include <arch/io.h>
#include <reset.h>
#include <southbridge/intel/fsp_rangeley/soc.h>
#include "model_406dx.h"
/*
* check for a warm reset and do a hard reset instead.
*/
static void check_for_warm_reset(void)
{
/*
* Check if INIT# is asserted by port 0xCF9 and whether RCBA has been set.
* If either is true, then this is a warm reset so execute a Hard Reset
*/
if ( (inb(0xcf9) == 0x04) ||
(pci_io_read_config32(SOC_LPC_DEV, RCBA) & RCBA_ENABLE) ) {
outb(0x00, 0xcf9);
outb(0x06, 0xcf9);
}
}
static void set_var_mtrr(int reg, uint32_t base, uint32_t size, int type)
{
#ifndef CONFIG_CPU_ADDR_BITS
#error "CONFIG_CPU_ADDR_BITS must be set."
#endif
/* Bit Bit 32-35 of MTRRphysMask should be set to 1 */
msr_t basem, maskm;
basem.lo = base | type;
basem.hi = 0;
wrmsr(MTRRphysBase_MSR(reg), basem);
maskm.lo = ~(size - 1) | MTRRphysMaskValid;
maskm.hi = (1 << (CONFIG_CPU_ADDR_BITS - 32)) - 1;
wrmsr(MTRRphysMask_MSR(reg), maskm);
}
static void enable_rom_caching(void)
{
msr_t msr;
disable_cache();
set_var_mtrr(1, 0xffffffff - CACHE_ROM_SIZE + 1,
CACHE_ROM_SIZE, MTRR_TYPE_WRPROT);
enable_cache();
/* Enable Variable MTRRs */
msr.hi = 0x00000000;
msr.lo = 0x00000800;
wrmsr(MTRRdefType_MSR, msr);
}
static void set_no_evict_mode_msr(void)
{
msr_t msr;
msr.hi = 0x00000000;
msr.lo = 0x00000000;
wrmsr(MSR_NO_EVICT_MODE, msr);
}
static void bootblock_cpu_init(void)
{
/* Check for Warm Reset */
check_for_warm_reset();
enable_rom_caching();
set_no_evict_mode_msr();
}
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