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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2015-2016 Advanced Micro Devices, Inc.
*
* 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 <console/console.h>
#include <cpu/x86/msr.h>
#include <cpu/amd/mtrr.h>
#include <device/device.h>
#include <device/pci.h>
#include <string.h>
#include <cpu/x86/msr.h>
#include <cpu/x86/pae.h>
#include <pc80/mc146818rtc.h>
#include <cpu/x86/lapic.h>
#include <cpu/cpu.h>
#include <cpu/x86/cache.h>
#include <cpu/x86/mtrr.h>
#include <cpu/amd/amdfam15.h>
#include <arch/acpi.h>
static void model_15_init(device_t dev)
{
printk(BIOS_DEBUG, "Model 15 Init.\n");
u8 i;
msr_t msr;
int msrno;
disable_cache();
/* Enable access to AMD RdDram and WrDram extension bits */
msr = rdmsr(SYSCFG_MSR);
msr.lo |= SYSCFG_MSR_MtrrFixDramModEn;
msr.lo &= ~SYSCFG_MSR_MtrrFixDramEn;
wrmsr(SYSCFG_MSR, msr);
// BSP: make a0000-bffff UC, c0000-fffff WB
msr.lo = msr.hi = 0;
wrmsr(MTRR_FIX_16K_A0000, msr);
msr.lo = msr.hi = 0x1e1e1e1e;
wrmsr(MTRR_FIX_64K_00000, msr);
wrmsr(MTRR_FIX_16K_80000, msr);
for (msrno = MTRR_FIX_4K_C0000 ; msrno <= MTRR_FIX_4K_F8000 ; msrno++)
wrmsr(msrno, msr);
msr = rdmsr(SYSCFG_MSR);
msr.lo &= ~SYSCFG_MSR_MtrrFixDramModEn;
msr.lo |= SYSCFG_MSR_MtrrFixDramEn;
wrmsr(SYSCFG_MSR, msr);
x86_mtrr_check();
x86_enable_cache();
/* zero the machine check error status registers */
msr.lo = 0;
msr.hi = 0;
for (i = 0 ; i < 6 ; i++)
wrmsr(MCI_STATUS + (i * 4), msr);
/* Enable the local CPU APICs */
setup_lapic();
/* DisableCf8ExtCfg */
msr = rdmsr(NB_CFG_MSR);
msr.hi &= ~(1 << (46 - 32));
wrmsr(NB_CFG_MSR, msr);
/* Write protect SMM space with SMMLOCK. */
msr = rdmsr(HWCR_MSR);
msr.lo |= (1 << 0);
wrmsr(HWCR_MSR, msr);
}
static struct device_operations cpu_dev_ops = {
.init = model_15_init,
};
static struct cpu_device_id cpu_table[] = {
{ X86_VENDOR_AMD, 0x670f00 },
{ 0, 0 },
};
static const struct cpu_driver model_15 __cpu_driver = {
.ops = &cpu_dev_ops,
.id_table = cpu_table,
};
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