| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2013 Google, 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 <device/pci_ops.h> |
| #include <cpu/x86/cache.h> |
| #include <cpu/x86/msr.h> |
| #include <cpu/x86/mtrr.h> |
| #include <soc/iosf.h> |
| #include <cpu/intel/microcode/microcode.c> |
| |
| 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); |
| } |
| |
| static void enable_rom_caching(void) |
| { |
| msr_t msr; |
| |
| disable_cache(); |
| /* Why only top 4MiB ? */ |
| set_var_mtrr(1, 0xffc00000, 4*1024*1024, 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 void bootblock_cpu_init(void) |
| { |
| /* Allow memory-mapped PCI config access. */ |
| setup_mmconfig(); |
| |
| /* Load microcode before any caching. */ |
| intel_update_microcode_from_cbfs(); |
| enable_rom_caching(); |
| } |