70b26e4356
VBE supports booting firmware during the SPL phases, i.e. so that VPL can start SPL and SPL can start U-Boot. It also supports booting an OS, when in U-Boot. As a first step towards these features, add functions to indicate the current VBE phase. The firmware selection is done in VPL and the OS selection is done in U-Boot proper. Signed-off-by: Simon Glass <sjg@chromium.org>
77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Verified Boot for Embedded (VBE) support
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* See doc/develop/vbe.rst
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*
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* Copyright 2022 Google LLC
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#ifndef __VBE_H
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#define __VBE_H
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/**
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* enum vbe_phase_t - current phase of VBE
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*
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* VBE operates in two distinct phases. In VPL it has to choose which firmware
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* to run (SPL, U-Boot, OP-TEE, etc.). It then carries on running until it gets
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* to U-Boot, where it decides which OS to run
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*
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* @VBE_PHASE_FIRMWARE: Selecting the firmware to run
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* @VBE_PHASE_OS: Selecting the Operating System to run
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*/
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enum vbe_phase_t {
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VBE_PHASE_FIRMWARE,
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VBE_PHASE_OS,
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};
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/**
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* vbe_phase() - get current VBE phase
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*
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* Returns: Current VBE phase
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*/
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static inline enum vbe_phase_t vbe_phase(void)
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{
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if (IS_ENABLED(CONFIG_SPL_BUILD))
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return VBE_PHASE_FIRMWARE;
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return VBE_PHASE_OS;
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}
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/**
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* vbe_list() - List the VBE bootmeths
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*
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* This shows a list of the VBE bootmeth devices
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*
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* @return 0 (always)
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*/
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int vbe_list(void);
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/**
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* vbe_find_by_any() - Find a VBE bootmeth by name or sequence
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*
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* @name: name (e.g. "vbe-simple"), or sequence ("2") to find
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* @devp: returns the device found, on success
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* Return: 0 if OK, -ve on error
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*/
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int vbe_find_by_any(const char *name, struct udevice **devp);
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/**
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* vbe_find_first_device() - Find the first VBE bootmeth
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*
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* @devp: Returns first available VBE bootmeth, or NULL if none
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* Returns: 0 (always)
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*/
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int vbe_find_first_device(struct udevice **devp);
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/**
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* vbe_find_next_device() - Find the next available VBE bootmeth
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*
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* @devp: Previous device to start from. Returns next available VBE bootmeth,
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* or NULL if none
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* Returns: 0 (always)
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*/
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int vbe_find_next_device(struct udevice **devp);
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#endif
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