Commit cd86ec26 authored by Volodymyr Babchuk's avatar Volodymyr Babchuk Committed by Anas Nashif
Browse files

aarch64: add ability to generate image header 



Image header is compatible with Linux aarch64 boot protocol,
so zephyr can be booted with U-boot or Xen loader.

Signed-off-by: default avatarVolodymyr Babchuk <volodymyr_babchuk@epam.com>
parent 7191b64c

arch/arm/core/aarch64/CMakeLists.txt

+1 −0
Original line number Diff line number Diff line
@@ -31,5 +31,6 @@ zephyr_library_sources_ifdef(CONFIG_GEN_SW_ISR_TABLE isr_wrapper.S) 
zephyr_library_sources_ifdef(CONFIG_IRQ_OFFLOAD irq_offload.c)

zephyr_library_sources_ifdef(CONFIG_THREAD_LOCAL_STORAGE ../common/tls.c)

zephyr_library_sources_ifdef(CONFIG_ARM_PSCI smccc-call.S)

zephyr_library_sources_ifdef(CONFIG_AARCH64_IMAGE_HEADER header.S)



add_subdirectory_ifdef(CONFIG_ARM_MMU mmu)

arch/arm/core/aarch64/Kconfig

+6 −0
Original line number Diff line number Diff line
@@ -56,6 +56,12 @@ config CMSIS_V2_THREAD_DYNAMIC_STACK_SIZE 
config IPM_CONSOLE_STACK_SIZE

	default 2048



config AARCH64_IMAGE_HEADER

	bool "Add image header"

	help

	  This option enables standard ARM64 boot image header used by Linux

	  and understood by loaders such as u-boot on Xen xl tool.



if CPU_CORTEX_A



config ARMV8_A_NS

arch/arm/core/aarch64/header.S

0 → 100644
+42 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2020 EPAM Systems

 *

 * SPDX-License-Identifier: Apache-2.0

 */



#include <linker/sections.h>

#include <arch/cpu.h>

#include "mmu/arm_mmu.h"



#if CONFIG_MMU_PAGE_SIZE == 4096

#define HEADER_PGSIZE	1

#elif CONFIG_MMU_PAGE_SIZE == 16384

#define HEADER_PGSIZE	2

#elif CONFIG_MMU_PAGE_SIZE == 65536

#define HEADER_PGSIZE	3

#else

#define HEADER_PGSIZE 0

#warning "Can't determine page size for header flags"

#endif



#define HEADER_FLAGS	(HEADER_PGSIZE << 1)



_ASM_FILE_PROLOGUE



SECTION_SUBSEC_FUNC(image_header,_image_header_section,_image_header)

	b	__start				// branch to kernel start

	.long	0				// reserved

	.quad	0				// Image load offset from start

						// of RAM, little-endian



	.quad	_flash_used			// Effective size of kernel

						// image, little-endian



	.quad	HEADER_FLAGS			// Informative flags,

						// little-endian



	.quad	0				// reserved

	.quad	0				// reserved

	.quad	0				// reserved

	.ascii	"ARM\x64"			// Magic number

	.long	0				// reserved

include/arch/arm/aarch64/scripts/linker.ld

+6 −0
Original line number Diff line number Diff line
@@ -107,6 +107,12 @@ SECTIONS 
#ifndef CONFIG_XIP

        z_mapped_start = .;

#endif



#ifdef CONFIG_AARCH64_IMAGE_HEADER

        KEEP(*(.image_header))

        KEEP(*(".image_header.*"))

#endif



        _vector_start = .;

        KEEP(*(.exc_vector_table))

        KEEP(*(".exc_vector_table.*"))

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