diff options
Diffstat (limited to 'src/vboot/vboot_loader.c')
| -rw-r--r-- | src/vboot/vboot_loader.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/src/vboot/vboot_loader.c b/src/vboot/vboot_loader.c deleted file mode 100644 index 6a7e284867..0000000000 --- a/src/vboot/vboot_loader.c +++ /dev/null @@ -1,158 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright 2015 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 <arch/early_variables.h> -#include <cbfs.h> -#include <cbmem.h> -#include <console/console.h> -#include <ec/google/chromeec/ec.h> -#include <rmodule.h> -#include <rules.h> -#include <string.h> -#include <vboot/misc.h> -#include <vboot/symbols.h> -#include <vboot/vboot_common.h> - -/* Ensure vboot configuration is valid: */ -_Static_assert(IS_ENABLED(CONFIG_VBOOT_STARTS_IN_BOOTBLOCK) + - IS_ENABLED(CONFIG_VBOOT_STARTS_IN_ROMSTAGE) == 1, - "vboot must either start in bootblock or romstage (not both!)"); -_Static_assert(!IS_ENABLED(CONFIG_VBOOT_SEPARATE_VERSTAGE) || - IS_ENABLED(CONFIG_VBOOT_STARTS_IN_BOOTBLOCK), - "stand-alone verstage must start in (i.e. after) bootblock"); -_Static_assert(!IS_ENABLED(CONFIG_VBOOT_RETURN_FROM_VERSTAGE) || - IS_ENABLED(CONFIG_VBOOT_SEPARATE_VERSTAGE), - "return from verstage only makes sense for separate verstages"); - -/* The stage loading code is compiled and entered from multiple stages. The - * helper functions below attempt to provide more clarity on when certain - * code should be called. */ - -static int verification_should_run(void) -{ - if (IS_ENABLED(CONFIG_VBOOT_SEPARATE_VERSTAGE)) - return ENV_VERSTAGE; - else if (IS_ENABLED(CONFIG_VBOOT_STARTS_IN_ROMSTAGE)) - return ENV_ROMSTAGE; - else if (IS_ENABLED(CONFIG_VBOOT_STARTS_IN_BOOTBLOCK)) - return ENV_BOOTBLOCK; - else - die("impossible!"); -} - -static int verstage_should_load(void) -{ - if (IS_ENABLED(CONFIG_VBOOT_SEPARATE_VERSTAGE)) - return ENV_BOOTBLOCK; - else - return 0; -} - -static int vboot_executed CAR_GLOBAL; - -int vb2_logic_executed(void) -{ - /* If we are in a stage that would load the verstage or execute the - vboot logic directly, we store the answer in a global. */ - if (verstage_should_load() || verification_should_run()) - return car_get_var(vboot_executed); - - if (IS_ENABLED(CONFIG_VBOOT_STARTS_IN_BOOTBLOCK)) { - /* All other stages are "after the bootblock" */ - return !ENV_BOOTBLOCK; - } else if (IS_ENABLED(CONFIG_VBOOT_STARTS_IN_ROMSTAGE)) { - /* Post-RAM stages are "after the romstage" */ -#ifdef __PRE_RAM__ - return 0; -#else - return 1; -#endif - } else { - die("impossible!"); - } -} - -static void vboot_prepare(void) -{ - if (verification_should_run()) { - /* Note: this path is not used for VBOOT_RETURN_FROM_VERSTAGE */ - verstage_main(); - car_set_var(vboot_executed, 1); - vb2_save_recovery_reason_vbnv(); - } else if (verstage_should_load()) { - struct cbfsf file; - struct prog verstage = - PROG_INIT(PROG_VERSTAGE, - CONFIG_CBFS_PREFIX "/verstage"); - - printk(BIOS_DEBUG, "VBOOT: Loading verstage.\n"); - - /* load verstage from RO */ - if (cbfs_boot_locate(&file, prog_name(&verstage), NULL)) - die("failed to load verstage"); - - cbfs_file_data(prog_rdev(&verstage), &file); - - if (cbfs_prog_stage_load(&verstage)) - die("failed to load verstage"); - - /* verify and select a slot */ - prog_run(&verstage); - - /* This is not actually possible to hit this condition at - * runtime, but this provides a hint to the compiler for dead - * code elimination below. */ - if (!IS_ENABLED(CONFIG_VBOOT_RETURN_FROM_VERSTAGE)) - return; - - car_set_var(vboot_executed, 1); - } - - /* - * Fill in vboot cbmem objects before moving to ramstage so all - * downstream users have access to vboot results. This path only - * applies to platforms employing VBOOT_STARTS_IN_ROMSTAGE because - * cbmem comes online prior to vboot verification taking place. For - * other platforms the vboot cbmem objects are initialized when - * cbmem comes online. - */ - if (ENV_ROMSTAGE && IS_ENABLED(CONFIG_VBOOT_STARTS_IN_ROMSTAGE)) { - vb2_store_selected_region(); - vboot_fill_handoff(); - } -} - -static int vboot_locate(struct cbfs_props *props) -{ - struct region selected_region; - - /* Don't honor vboot results until the vboot logic has run. */ - if (!vb2_logic_executed()) - return -1; - - if (vb2_get_selected_region(&selected_region)) - return -1; - - props->offset = region_offset(&selected_region); - props->size = region_sz(&selected_region); - - return 0; -} - -const struct cbfs_locator vboot_locator = { - .name = "VBOOT", - .prepare = vboot_prepare, - .locate = vboot_locate, -}; |