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bootm: refactor image detection and os load steps

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Created a bootm_start() that handles the parsing and detection of all
the images that will be used by the bootm command (OS, ramdisk, fdt).
As part of this we now tract all the relevant image offsets in the
bootm_headers_t struct. This will allow us to have all the needed
state for future sub-commands and lets us reduce a bit of arch
specific code on SPARC.

Created a bootm_load_os() that deals with decompression and loading
the OS image.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Kumar Gala 2008-08-15 08:24:41 -05:00 • committed by Wolfgang Denk
parent e906cfae08
commit 396f635b8f
3 changed files with 146 additions and 118 deletions
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9
include/image.h
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@ -187,6 +187,13 @@ typedef struct image_header {
uint8_t ih_name[IH_NMLEN]; /* Image Name */
} image_header_t;
typedef struct image_info {
ulong start, end; /* start/end of blob */
ulong image_start, image_len; /* start of image within blob, len of image */
ulong load; /* load addr for the image */
uint8_t comp, type, os; /* compression, type of image, os type */
} image_info_t;
/*
* Legacy and FIT format headers used by do_bootm() and do_bootm_<os>()
* routines.
@ -219,6 +226,7 @@ typedef struct bootm_headers {
#endif
#endif
image_info_t os; /* os image info */
ulong ep; /* entry point of OS */
ulong rd_start, rd_end;/* ramdisk start/end */
@ -229,6 +237,7 @@ typedef struct bootm_headers {
ulong ft_len; /* length of flat device tree */
int verify; /* getenv("verify")[0] != 'n' */
int valid; /* set to 1 if we've set values in the header */
#ifndef USE_HOSTCC
struct lmb lmb; /* for memory mgmt */
#endif