Git Repo - u-boot.git/blame_incremental

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Commit	Line	Data
	1	// SPDX-License-Identifier: GPL-2.0+
	2	/*
	3	* (C) Copyright 2000-2009
	4	* Wolfgang Denk, DENX Software Engineering, [email protected].
	5	*/
	6
	7	#include <common.h>
	8	#include <image.h>
	9	#include <mapmem.h>
	10	#include <asm/global_data.h>
	11	#include <linux/bitops.h>
	12	#include <linux/sizes.h>
	13
	14	DECLARE_GLOBAL_DATA_PTR;
	15
	16	#define LINUX_ARM64_IMAGE_MAGIC 0x644d5241
	17
	18	/* See Documentation/arm64/booting.txt in the Linux kernel */
	19	struct Image_header {
	20	uint32_t code0; /* Executable code */
	21	uint32_t code1; /* Executable code */
	22	uint64_t text_offset; /* Image load offset, LE */
	23	uint64_t image_size; /* Effective Image size, LE */
	24	uint64_t flags; /* Kernel flags, LE */
	25	uint64_t res2; /* reserved */
	26	uint64_t res3; /* reserved */
	27	uint64_t res4; /* reserved */
	28	uint32_t magic; /* Magic number */
	29	uint32_t res5;
	30	};
	31
	32	int booti_setup(ulong image, ulong relocated_addr, ulong size,
	33	bool force_reloc)
	34	{
	35	struct Image_header *ih;
	36	uint64_t dst;
	37	uint64_t image_size, text_offset;
	38
	39	*relocated_addr = image;
	40
	41	ih = (struct Image_header *)map_sysmem(image, 0);
	42
	43	if (ih->magic != le32_to_cpu(LINUX_ARM64_IMAGE_MAGIC)) {
	44	puts("Bad Linux ARM64 Image magic!\n");
	45	return 1;
	46	}
	47
	48	/*
	49	* Prior to Linux commit a2c1d73b94ed, the text_offset field
	50	* is of unknown endianness. In these cases, the image_size
	51	* field is zero, and we can assume a fixed value of 0x80000.
	52	*/
	53	if (ih->image_size == 0) {
	54	puts("Image lacks image_size field, assuming 16MiB\n");
	55	image_size = 16 << 20;
	56	text_offset = 0x80000;
	57	} else {
	58	image_size = le64_to_cpu(ih->image_size);
	59	text_offset = le64_to_cpu(ih->text_offset);
	60	}
	61
	62	*size = image_size;
	63
	64	/*
	65	* If bit 3 of the flags field is set, the 2MB aligned base of the
	66	* kernel image can be anywhere in physical memory, so respect
	67	* images->ep. Otherwise, relocate the image to the base of RAM
	68	* since memory below it is not accessible via the linear mapping.
	69	*/
	70	if (!force_reloc && (le64_to_cpu(ih->flags) & BIT(3)))
	71	dst = image - text_offset;
	72	else
	73	dst = gd->bd->bi_dram[0].start;
	74
	75	*relocated_addr = ALIGN(dst, SZ_2M) + text_offset;
	76
	77	unmap_sysmem(ih);
	78
	79	return 0;
	80	}