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-rw-r--r--qemu/roms/u-boot/doc/README.commands36
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diff --git a/qemu/roms/u-boot/doc/README.commands b/qemu/roms/u-boot/doc/README.commands
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-
-Commands are added to U-Boot by creating a new command structure.
-This is done by first including command.h, then using the U_BOOT_CMD() macro
-to fill in a cmd_tbl_t struct.
-
-U_BOOT_CMD(name,maxargs,repeatable,command,"usage","help")
-
-name: is the name of the commad. THIS IS NOT a string.
-maxargs: the maximum number of arguments this function takes
-repeatable: either 0 or 1 to indicate if autorepeat is allowed
-command: Function pointer (*cmd)(struct cmd_tbl_s *, int, int, char *[]);
-usage: Short description. This is a string
-help: Long description. This is a string
-
-
-**** Behind the scene ******
-
-The structure created is named with a special prefix and placed by
-the linker in a special section using the linker lists mechanism
-(see include/linker_lists.h)
-
-This makes it possible for the final link to extract all commands
-compiled into any object code and construct a static array so the
-command array can be iterated over using the linker lists macros.
-
-The linker lists feature ensures that the linker does not discard
-these symbols when linking full U-Boot even though they are not
-referenced in the source code as such.
-
-If a new board is defined do not forget to define the command section
-by writing in u-boot.lds ($(srctree)/board/boardname/u-boot.lds) these
-3 lines:
-
- .u_boot_list : {
- KEEP(*(SORT(.u_boot_list*)));
- }