From 6808ef9ac2a66a261bf341a99c3edb1e69f1cbdd Mon Sep 17 00:00:00 2001 From: Bin Chen Date: Sat, 27 Jan 2018 16:59:09 +1100 Subject: move booti_setup to arch/arm/lig/image.c Follow bootz's pattern by moving the booti_setup to arch/arm/lib. This allows to use booti_setup in other paths, e.g booting an Android image containing Image format. Note that kernel relocation is move out of booti_setup and it is the caller's responsibility to do it and allows them do it differently. say, cmd/booti.c just do a manually, while in the bootm path, we can use bootm_load_os(with some changes). Signed-off-by: Bin Chen Reviewed-by: Tom Rini --- arch/arm/lib/Makefile | 2 +- arch/arm/lib/image.c | 77 +++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 78 insertions(+), 1 deletion(-) create mode 100644 arch/arm/lib/image.c (limited to 'arch/arm/lib') diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile index 876024f..b5ffffd 100644 --- a/arch/arm/lib/Makefile +++ b/arch/arm/lib/Makefile @@ -32,7 +32,7 @@ endif obj-$(CONFIG_CPU_V7M) += cmd_boot.o obj-$(CONFIG_OF_LIBFDT) += bootm-fdt.o -obj-$(CONFIG_CMD_BOOTI) += bootm.o +obj-$(CONFIG_CMD_BOOTI) += bootm.o image.o obj-$(CONFIG_CMD_BOOTM) += bootm.o obj-$(CONFIG_CMD_BOOTZ) += bootm.o zimage.o obj-$(CONFIG_SYS_L2_PL310) += cache-pl310.o diff --git a/arch/arm/lib/image.c b/arch/arm/lib/image.c new file mode 100644 index 0000000..f72cf63 --- /dev/null +++ b/arch/arm/lib/image.c @@ -0,0 +1,77 @@ +/* + * (C) Copyright 2000-2009 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include + +DECLARE_GLOBAL_DATA_PTR; + +#define LINUX_ARM64_IMAGE_MAGIC 0x644d5241 + +/* See Documentation/arm64/booting.txt in the Linux kernel */ +struct Image_header { + uint32_t code0; /* Executable code */ + uint32_t code1; /* Executable code */ + uint64_t text_offset; /* Image load offset, LE */ + uint64_t image_size; /* Effective Image size, LE */ + uint64_t flags; /* Kernel flags, LE */ + uint64_t res2; /* reserved */ + uint64_t res3; /* reserved */ + uint64_t res4; /* reserved */ + uint32_t magic; /* Magic number */ + uint32_t res5; +}; + +int booti_setup(ulong image, ulong *relocated_addr, ulong *size) +{ + struct Image_header *ih; + uint64_t dst; + uint64_t image_size, text_offset; + + *relocated_addr = image; + + ih = (struct Image_header *)map_sysmem(image, 0); + + if (ih->magic != le32_to_cpu(LINUX_ARM64_IMAGE_MAGIC)) { + puts("Bad Linux ARM64 Image magic!\n"); + return 1; + } + + /* + * Prior to Linux commit a2c1d73b94ed, the text_offset field + * is of unknown endianness. In these cases, the image_size + * field is zero, and we can assume a fixed value of 0x80000. + */ + if (ih->image_size == 0) { + puts("Image lacks image_size field, assuming 16MiB\n"); + image_size = 16 << 20; + text_offset = 0x80000; + } else { + image_size = le64_to_cpu(ih->image_size); + text_offset = le64_to_cpu(ih->text_offset); + } + + *size = image_size; + + /* + * If bit 3 of the flags field is set, the 2MB aligned base of the + * kernel image can be anywhere in physical memory, so respect + * images->ep. Otherwise, relocate the image to the base of RAM + * since memory below it is not accessible via the linear mapping. + */ + if (le64_to_cpu(ih->flags) & BIT(3)) + dst = image - text_offset; + else + dst = gd->bd->bi_dram[0].start; + + *relocated_addr = ALIGN(dst, SZ_2M) + text_offset; + + unmap_sysmem(ih); + + return 0; +} -- cgit v1.1