Follow bootz's pattern by moving the booti_setup to arch/arm/lib. This allows to use that function in other path, e.g booting an android image contains 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 bin.chen@linaro.org --- arch/arm/lib/Makefile | 2 +- arch/arm/lib/image.c | 76 ++++++++++++++++++++++++++++++++++++++++++ cmd/booti.c | 92 ++++++++------------------------------------------- include/image.h | 10 ++++++ 4 files changed, 100 insertions(+), 80 deletions(-) create mode 100644 arch/arm/lib/image.c
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile index 6e96cfb..8122788 100644 --- a/arch/arm/lib/Makefile +++ b/arch/arm/lib/Makefile @@ -26,7 +26,7 @@ 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..460f8eb --- /dev/null +++ b/arch/arm/lib/image.c @@ -0,0 +1,76 @@ +/* + * (C) Copyright 2000-2009 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <mapmem.h> + +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; +} diff --git a/cmd/booti.c b/cmd/booti.c index da6fb01..91e61da 100644 --- a/cmd/booti.c +++ b/cmd/booti.c @@ -16,77 +16,6 @@
DECLARE_GLOBAL_DATA_PTR;
-/* 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; -}; - -#define LINUX_ARM64_IMAGE_MAGIC 0x644d5241 - -static int booti_setup(bootm_headers_t *images) -{ - struct Image_header *ih; - uint64_t dst; - uint64_t image_size, text_offset; - - ih = (struct Image_header *)map_sysmem(images->ep, 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); - } - - /* - * 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 = images->ep - text_offset; - else - dst = gd->bd->bi_dram[0].start; - - dst = ALIGN(dst, SZ_2M) + text_offset; - - unmap_sysmem(ih); - - if (images->ep != dst) { - void *src; - - debug("Moving Image from 0x%lx to 0x%llx\n", images->ep, dst); - - src = (void *)images->ep; - images->ep = dst; - memmove((void *)dst, src, image_size); - } - - return 0; -} - /* * Image booting support */ @@ -94,31 +23,36 @@ static int booti_start(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], bootm_headers_t *images) { int ret; - struct Image_header *ih; + ulong ld; + ulong relocated_addr; + ulong image_size;
ret = do_bootm_states(cmdtp, flag, argc, argv, BOOTM_STATE_START, images, 1);
/* Setup Linux kernel Image entry point */ if (!argc) { - images->ep = load_addr; + ld = load_addr; debug("* kernel: default image load address = 0x%08lx\n", load_addr); } else { - images->ep = simple_strtoul(argv[0], NULL, 16); + ld = simple_strtoul(argv[0], NULL, 16); debug("* kernel: cmdline image address = 0x%08lx\n", images->ep); }
- ret = booti_setup(images); + ret = booti_setup(ld, &relocated_addr, &image_size); if (ret != 0) return 1;
- ih = (struct Image_header *)map_sysmem(images->ep, 0); - - lmb_reserve(&images->lmb, images->ep, le32_to_cpu(ih->image_size)); + /* Handle BOOTM_STATE_LOADOS */ + if (relocated_addr != ld) { + debug("Moving Image from 0x%lx to 0x%lx\n", ld, relocated_addr); + memmove((void *)relocated_addr, (void *)ld, image_size); + }
- unmap_sysmem(ih); + images->ep = relocated_addr; + lmb_reserve(&images->lmb, images->ep, le32_to_cpu(image_size));
/* * Handle the BOOTM_STATE_FINDOTHER state ourselves as we do not diff --git a/include/image.h b/include/image.h index 8264c52..ade948e 100644 --- a/include/image.h +++ b/include/image.h @@ -848,6 +848,16 @@ int image_setup_linux(bootm_headers_t *images); */ int bootz_setup(ulong image, ulong *start, ulong *end);
+/** + * Return the correct start address and size of a Linux aarch64 Image, + * also kernel relocation inside, if needed. + * + * @image: Address of image + * @start: Returns start address of image + * @size : Returns size image + * @return 0 if OK, 1 if the image was not recognised + */ +int booti_setup(ulong image, ulong *relocated_addr, ulong *size);
/*******************************************************************/ /* New uImage format specific code (prefixed with fit_) */