9fc8cf89e8
Since now we have persistent context, the usage of the flags can be replaced with vb2_context.flags. BRANCH=none BUG=chromium:1021452 TEST=emerge-kukui coreboot Change-Id: I8e5757a8cc09712c3acde9cbaab910b7498681b4 Signed-off-by: Yu-Ping Wu <yupingso@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/36808 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
118 lines
3.3 KiB
C
118 lines
3.3 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2014 The ChromiumOS Authors. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __VBOOT_MISC_H__
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#define __VBOOT_MISC_H__
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#include <assert.h>
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#include <arch/early_variables.h>
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#include <security/vboot/vboot_common.h>
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struct vb2_context;
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struct vb2_shared_data;
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struct selected_region {
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uint32_t offset;
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uint32_t size;
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};
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/*
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* Stores vboot-related information. selected_region is used by verstage to
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* store the location of the selected slot. buffer is used by vboot to store
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* its work buffer. vb2_context is contained within this work buffer, and is
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* accessible via vboot_init_context() and vboot_get_context() (see below).
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* Keep the struct CPU architecture agnostic as it crosses stage boundaries.
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*/
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struct vboot_working_data {
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struct selected_region selected_region;
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/* offset of the buffer from the start of this struct */
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uint16_t buffer_offset;
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uint16_t buffer_size;
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};
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/*
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* Source: security/vboot/common.c
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*/
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struct vboot_working_data *vboot_get_working_data(void);
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struct vb2_context *vboot_get_context(void);
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/* Returns 0 on success. < 0 on failure. */
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int vboot_get_selected_region(struct region *region);
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void vboot_set_selected_region(const struct region *region);
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int vboot_is_slot_selected(void);
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/*
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* Source: security/vboot/vboot_handoff.c
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*/
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void vboot_fill_handoff(void);
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/*
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* Source: security/vboot/bootmode.c
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*/
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void vboot_save_recovery_reason_vbnv(void);
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/*
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* The stage loading code is compiled and entered from multiple stages. The
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* helper functions below attempt to provide more clarity on when certain
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* code should be called. They are implemented inline for better compile-time
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* code elimination.
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*/
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static inline int verification_should_run(void)
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{
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if (CONFIG(VBOOT_SEPARATE_VERSTAGE))
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return ENV_VERSTAGE;
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else if (CONFIG(VBOOT_STARTS_IN_ROMSTAGE))
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return ENV_ROMSTAGE;
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else if (CONFIG(VBOOT_STARTS_IN_BOOTBLOCK))
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return ENV_BOOTBLOCK;
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else
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dead_code();
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}
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static inline int verstage_should_load(void)
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{
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if (CONFIG(VBOOT_SEPARATE_VERSTAGE))
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return ENV_BOOTBLOCK;
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else
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return 0;
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}
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static inline int vboot_logic_executed(void)
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{
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extern int vboot_executed; /* should not be globally accessible */
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/* If we are in the stage that runs verification, or in the stage that
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both loads the verstage and is returned to from it afterwards, we
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need to check a global to see if verfication has run. */
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if (verification_should_run() ||
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(verstage_should_load() && CONFIG(VBOOT_RETURN_FROM_VERSTAGE)))
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return car_get_var(vboot_executed);
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if (CONFIG(VBOOT_STARTS_IN_BOOTBLOCK)) {
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/* All other stages are "after the bootblock" */
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return !ENV_BOOTBLOCK;
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} else if (CONFIG(VBOOT_STARTS_IN_ROMSTAGE)) {
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/* Post-RAM stages are "after the romstage" */
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return !ENV_ROMSTAGE_OR_BEFORE;
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} else {
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dead_code();
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}
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}
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#endif /* __VBOOT_MISC_H__ */
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