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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Verified Boot for Embedded (VBE) vbe-simple common file
*
* Copyright 2022 Google LLC
* Written by Simon Glass <sjg@chromium.org>
*/
#ifndef __VBE_SIMPLE_H
#define __VBE_SIMPLE_H
enum {
MAX_VERSION_LEN = 256,
NVD_HDR_VER_SHIFT = 0,
NVD_HDR_VER_MASK = 0xf,
NVD_HDR_SIZE_SHIFT = 4,
NVD_HDR_SIZE_MASK = 0xf << NVD_HDR_SIZE_SHIFT,
/* Firmware key-version is in the top 16 bits of fw_ver */
FWVER_KEY_SHIFT = 16,
FWVER_FW_MASK = 0xffff,
NVD_HDR_VER_CUR = 1, /* current version */
};
/** struct simple_priv - information read from the device tree */
struct simple_priv {
u32 area_start;
u32 area_size;
u32 skip_offset;
u32 state_offset;
u32 state_size;
u32 version_offset;
u32 version_size;
const char *storage;
};
/** struct simple_state - state information read from media
*
* @fw_version: Firmware version string
* @fw_vernum: Firmware version number
*/
struct simple_state {
char fw_version[MAX_VERSION_LEN];
u32 fw_vernum;
};
/**
* vbe_simple_read_fw_bootflow() - Read a bootflow for firmware
*
* Locates and loads the firmware image (FIT) needed for the next phase. The FIT
* should ideally use external data, to reduce the amount of it that needs to be
* read.
*
* @bdev: bootdev device containing the firmwre
* @blow: Place to put the created bootflow, on success
* @return 0 if OK, -ve on error
*/
int vbe_simple_read_bootflow_fw(struct udevice *dev, struct bootflow *bflow);
/**
* vbe_simple_read_state() - Read the VBE simple state information
*
* @dev: VBE bootmeth
* @state: Place to put the state
* @return 0 if OK, -ve on error
*/
int vbe_simple_read_state(struct udevice *dev, struct simple_state *state);
#endif /* __VBE_SIMPLE_H */
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