| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2012 Google 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 <stdint.h> |
| #include <console/console.h> |
| #include <arch/cpu.h> |
| #include <cf9_reset.h> |
| #include <cpu/x86/bist.h> |
| #include <cpu/x86/msr.h> |
| #include <cpu/x86/mtrr.h> |
| #include <timestamp.h> |
| #include <device/pci_def.h> |
| #include <cpu/x86/lapic.h> |
| #include <cbmem.h> |
| #include <commonlib/helpers.h> |
| #include <program_loading.h> |
| #include <romstage_handoff.h> |
| #include <vendorcode/google/chromeos/chromeos.h> |
| #if CONFIG(EC_GOOGLE_CHROMEEC) |
| #include <ec/google/chromeec/ec.h> |
| #endif |
| #include <northbridge/intel/haswell/haswell.h> |
| #include <northbridge/intel/haswell/raminit.h> |
| #include <southbridge/intel/lynxpoint/pch.h> |
| #include <southbridge/intel/lynxpoint/me.h> |
| #include <cpu/intel/romstage.h> |
| #include "haswell.h" |
| |
| /* platform_enter_postcar() determines the stack to use after |
| * cache-as-ram is torn down as well as the MTRR settings to use, |
| * and continues execution in postcar stage. */ |
| void platform_enter_postcar(void) |
| { |
| struct postcar_frame pcf; |
| uintptr_t top_of_ram; |
| |
| if (postcar_frame_init(&pcf, 0)) |
| die("Unable to initialize postcar frame.\n"); |
| /* Cache the ROM as WP just below 4GiB. */ |
| postcar_frame_add_romcache(&pcf, MTRR_TYPE_WRPROT); |
| |
| /* Cache RAM as WB from 0 -> CACHE_TMP_RAMTOP. */ |
| postcar_frame_add_mtrr(&pcf, 0, CACHE_TMP_RAMTOP, MTRR_TYPE_WRBACK); |
| |
| /* Cache at least 8 MiB below the top of ram, and at most 8 MiB |
| * above top of the ram. This satisfies MTRR alignment requirement |
| * with different TSEG size configurations. |
| */ |
| top_of_ram = ALIGN_DOWN((uintptr_t)cbmem_top(), 8*MiB); |
| postcar_frame_add_mtrr(&pcf, top_of_ram - 8*MiB, 16*MiB, |
| MTRR_TYPE_WRBACK); |
| |
| run_postcar_phase(&pcf); |
| } |
| |
| void romstage_common(const struct romstage_params *params) |
| { |
| int boot_mode; |
| int wake_from_s3; |
| |
| if (params->bist == 0) |
| enable_lapic(); |
| |
| wake_from_s3 = early_pch_init(params->gpio_map, params->rcba_config); |
| |
| /* Halt if there was a built in self test failure */ |
| report_bist_failure(params->bist); |
| |
| /* Perform some early chipset initialization required |
| * before RAM initialization can work |
| */ |
| haswell_early_initialization(HASWELL_MOBILE); |
| printk(BIOS_DEBUG, "Back from haswell_early_initialization()\n"); |
| |
| if (wake_from_s3) { |
| #if CONFIG(HAVE_ACPI_RESUME) |
| printk(BIOS_DEBUG, "Resume from S3 detected.\n"); |
| #else |
| printk(BIOS_DEBUG, "Resume from S3 detected, but disabled.\n"); |
| wake_from_s3 = 0; |
| #endif |
| } |
| |
| /* There are hard coded assumptions of 2 meaning s3 wake. Normalize |
| * the users of the 2 literal here based off wake_from_s3. */ |
| boot_mode = wake_from_s3 ? 2 : 0; |
| |
| /* Prepare USB controller early in S3 resume */ |
| if (wake_from_s3) |
| enable_usb_bar(); |
| |
| post_code(0x3a); |
| params->pei_data->boot_mode = boot_mode; |
| |
| timestamp_add_now(TS_BEFORE_INITRAM); |
| |
| report_platform_info(); |
| |
| if (params->copy_spd != NULL) |
| params->copy_spd(params->pei_data); |
| |
| sdram_initialize(params->pei_data); |
| |
| timestamp_add_now(TS_AFTER_INITRAM); |
| |
| post_code(0x3b); |
| |
| intel_early_me_status(); |
| |
| if (!wake_from_s3) { |
| cbmem_initialize_empty(); |
| /* Save data returned from MRC on non-S3 resumes. */ |
| save_mrc_data(params->pei_data); |
| } else if (cbmem_initialize()) { |
| #if CONFIG(HAVE_ACPI_RESUME) |
| /* Failed S3 resume, reset to come up cleanly */ |
| system_reset(); |
| #endif |
| } |
| |
| haswell_unhide_peg(); |
| |
| setup_sdram_meminfo(params->pei_data); |
| |
| romstage_handoff_init(wake_from_s3); |
| |
| post_code(0x3f); |
| } |