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Diffstat (limited to 'qemu/roms/u-boot/doc/README.commands')
-rw-r--r-- | qemu/roms/u-boot/doc/README.commands | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/qemu/roms/u-boot/doc/README.commands b/qemu/roms/u-boot/doc/README.commands deleted file mode 100644 index afd5577b0..000000000 --- a/qemu/roms/u-boot/doc/README.commands +++ /dev/null @@ -1,36 +0,0 @@ - -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*))); - } |