diff options
| -rw-r--r-- | cmd/booti.c | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/cmd/booti.c b/cmd/booti.c index bff87a8..da6fb01 100644 --- a/cmd/booti.c +++ b/cmd/booti.c @@ -11,6 +11,8 @@ #include <image.h> #include <lmb.h> #include <mapmem.h> +#include <linux/kernel.h> +#include <linux/sizes.h> DECLARE_GLOBAL_DATA_PTR; @@ -20,7 +22,7 @@ struct Image_header { uint32_t code1; /* Executable code */ uint64_t text_offset; /* Image load offset, LE */ uint64_t image_size; /* Effective Image size, LE */ - uint64_t res1; /* reserved */ + uint64_t flags; /* Kernel flags, LE */ uint64_t res2; /* reserved */ uint64_t res3; /* reserved */ uint64_t res4; /* reserved */ @@ -34,7 +36,7 @@ static int booti_setup(bootm_headers_t *images) { struct Image_header *ih; uint64_t dst; - uint64_t image_size; + uint64_t image_size, text_offset; ih = (struct Image_header *)map_sysmem(images->ep, 0); @@ -42,19 +44,33 @@ static int booti_setup(bootm_headers_t *images) 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 we are not at the correct run-time location, set the new - * correct location and then move the image there. + * 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. */ - dst = gd->bd->bi_dram[0].start + le64_to_cpu(ih->text_offset); + 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); |