zephyr/soc/lowrisc/opentitan/rom_header.S

30 lines
835 B
ArmAsm
Raw Normal View History

/*
* Copyright (c) 2023 Rivos Inc.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/toolchain.h>
/* exports */
GTEXT(__rom_header)
/* OpenTitan manifest consists of 1024 bytes (256 words) of manifest
* containing signature, device ID, version info, etc. The test ROM
* ignores all of these fields except for entry point.
*
* The layout below conforms to manifest version: 0x71c3 (major),
* 0x6c47 (minor). The manifest format is documented here:
* https://github.com/lowRISC/opentitan/blob/689a163294e1791bd30cfe096decf7f9233abad4/sw/host/opentitanlib/src/image/manifest.rs#L205
*/
SECTION_FUNC(rom_header, __rom_header)
.rept(225)
.word 0
.endr
/* Entry point is relative to the beginning of manifest. */
.word(__start - __rom_header)
/* Extensions entry table goes here. */
.rept(30)
.word 0
.endr