72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Verified Boot for Embedded (VBE) vbe-simple common file
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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_SIMPLE_H
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#define __VBE_SIMPLE_H
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enum {
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MAX_VERSION_LEN = 256,
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NVD_HDR_VER_SHIFT = 0,
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NVD_HDR_VER_MASK = 0xf,
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NVD_HDR_SIZE_SHIFT = 4,
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NVD_HDR_SIZE_MASK = 0xf << NVD_HDR_SIZE_SHIFT,
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/* Firmware key-version is in the top 16 bits of fw_ver */
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FWVER_KEY_SHIFT = 16,
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FWVER_FW_MASK = 0xffff,
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NVD_HDR_VER_CUR = 1, /* current version */
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};
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/** struct simple_priv - information read from the device tree */
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struct simple_priv {
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u32 area_start;
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u32 area_size;
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u32 skip_offset;
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u32 state_offset;
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u32 state_size;
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u32 version_offset;
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u32 version_size;
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const char *storage;
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};
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/** struct simple_state - state information read from media
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*
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* @fw_version: Firmware version string
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* @fw_vernum: Firmware version number
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*/
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struct simple_state {
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char fw_version[MAX_VERSION_LEN];
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u32 fw_vernum;
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};
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/**
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* vbe_simple_read_fw_bootflow() - Read a bootflow for firmware
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*
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* Locates and loads the firmware image (FIT) needed for the next phase. The FIT
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* should ideally use external data, to reduce the amount of it that needs to be
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* read.
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*
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* @bdev: bootdev device containing the firmwre
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* @blow: Place to put the created bootflow, on success
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* @return 0 if OK, -ve on error
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*/
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int vbe_simple_read_bootflow_fw(struct udevice *dev, struct bootflow *bflow);
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/**
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* vbe_simple_read_state() - Read the VBE simple state information
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*
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* @dev: VBE bootmeth
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* @state: Place to put the state
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* @return 0 if OK, -ve on error
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*/
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int vbe_simple_read_state(struct udevice *dev, struct simple_state *state);
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#endif /* __VBE_SIMPLE_H */
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