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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 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.
*/
#include <arch/io.h>
#include <cpu/x86/cache.h>
#include <cpu/x86/msr.h>
#include <cpu/x86/mtrr.h>
#include <cpu/intel/microcode/microcode.c>
#include <soc/iosf.h>
#include <soc/pci_devs.h>
#include <soc/spi.h>
#include <soc/iomap.h>
#include <soc/lpc.h>
#include <soc/gpio.h>
#include <reset.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(LPC_BDF, RCBA) & RCBA_ENABLE) ) {
outb(0x00, 0xcf9);
outb(0x06, 0xcf9);
}
}
static void set_var_mtrr(int reg, uint32_t base, uint32_t size, int type)
{
msr_t basem, maskm;
basem.lo = base | type;
basem.hi = 0;
wrmsr(MTRR_PHYS_BASE(reg), basem);
maskm.lo = ~(size - 1) | MTRR_PHYS_MASK_VALID;
maskm.hi = (1 << (CONFIG_CPU_ADDR_BITS - 32)) - 1;
wrmsr(MTRR_PHYS_MASK(reg), maskm);
}
/*
* Enable Prefetching and Caching.
*/
static void enable_spi_prefetch(void)
{
u32 *bcr = (u32 *)(SPI_BASE_ADDRESS + BCR);
/* Enable caching and prefetching in the SPI controller. */
write32(bcr, (read32(bcr) & ~SRC_MASK) | SRC_CACHE_PREFETCH);
}
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(MTRR_DEF_TYPE_MSR, msr);
}
static void setup_mmconfig(void)
{
uint32_t reg;
/* Set up the MMCONF range. The register lives in the BUNIT. The
* IO variant of the config access needs to be used initially to
* properly configure as the IOSF access registers live in PCI
* config space. */
reg = 0;
/* Clear the extended register. */
pci_io_write_config32(IOSF_PCI_DEV, MCRX_REG, reg);
reg = CONFIG_MMCONF_BASE_ADDRESS | 1;
pci_io_write_config32(IOSF_PCI_DEV, MDR_REG, reg);
reg = IOSF_OPCODE(IOSF_OP_WRITE_BUNIT) | IOSF_PORT(IOSF_PORT_BUNIT) |
IOSF_REG(BUNIT_MMCONF_REG) | IOSF_BYTE_EN;
pci_io_write_config32(IOSF_PCI_DEV, MCR_REG, reg);
}
static const uint8_t lpc_pads[12] = {
70, 68, 67, 66, 69, 71, 65, 72, 86, 90, 88, 92,
};
static void set_up_lpc_pads(void)
{
uint32_t reg = IO_BASE_ADDRESS | SET_BAR_ENABLE;
pci_write_config32(LPC_BDF, IOBASE, reg);
for (reg = 0; reg < 12; reg++)
score_select_func(lpc_pads[reg], 1);
}
static void bootblock_cpu_init(void)
{
check_for_warm_reset();
/* Load microcode before any caching. */
intel_update_microcode_from_cbfs();
/* Allow memory-mapped PCI config access. */
setup_mmconfig();
enable_rom_caching();
enable_spi_prefetch();
set_up_lpc_pads();
}
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