| /* |
| * 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 <string.h> |
| #include <arch/acpi.h> |
| #include <cbmem.h> |
| #include <console/console.h> |
| #include <console/streams.h> |
| #include <cpu/x86/tsc.h> |
| #include <program_loading.h> |
| #include <rmodule.h> |
| #include <stage_cache.h> |
| |
| #include <soc/ramstage.h> |
| #include <soc/efi_wrapper.h> |
| |
| static void ABI_X86 send_to_console(unsigned char b) |
| { |
| console_tx_byte(b); |
| } |
| |
| static efi_wrapper_entry_t load_refcode_from_cache(void) |
| { |
| struct prog refcode; |
| |
| printk(BIOS_DEBUG, "refcode loading from cache.\n"); |
| |
| stage_cache_load_stage(STAGE_REFCODE, &refcode); |
| |
| return (efi_wrapper_entry_t)prog_entry(&refcode); |
| } |
| |
| static efi_wrapper_entry_t load_reference_code(void) |
| { |
| struct prog prog = |
| PROG_INIT(PROG_REFCODE, CONFIG_CBFS_PREFIX "/refcode"); |
| struct rmod_stage_load refcode = { |
| .cbmem_id = CBMEM_ID_REFCODE, |
| .prog = &prog, |
| }; |
| |
| if (acpi_is_wakeup_s3()) { |
| return load_refcode_from_cache(); |
| } |
| |
| if (prog_locate(&prog)) { |
| printk(BIOS_DEBUG, "Couldn't locate reference code.\n"); |
| return NULL; |
| } |
| |
| if (rmodule_stage_load(&refcode)) { |
| printk(BIOS_DEBUG, "Error loading reference code.\n"); |
| return NULL; |
| } |
| |
| /* Cache loaded reference code. */ |
| stage_cache_add(STAGE_REFCODE, &prog); |
| |
| return prog_entry(&prog); |
| } |
| |
| void baytrail_run_reference_code(void) |
| { |
| int ret; |
| efi_wrapper_entry_t entry; |
| struct efi_wrapper_params wrp = { |
| .version = EFI_WRAPPER_VER, |
| .console_out = send_to_console, |
| }; |
| |
| entry = load_reference_code(); |
| |
| if (entry == NULL) |
| return; |
| |
| wrp.tsc_ticks_per_microsecond = tsc_freq_mhz(); |
| |
| /* Call into reference code. */ |
| ret = entry(&wrp); |
| |
| if (ret != 0) { |
| printk(BIOS_DEBUG, "Reference code returned %d\n", ret); |
| return; |
| } |
| } |