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common: Convert the U-Boot commands to LG-arrays

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This patch converts the old method of creating a list of command
onto the new LG-arrays code. The old u_boot_cmd section is converted
to new u_boot_list_cmd subsection and LG-array macros used as needed.

Minor adjustments had to be made to the common code to work with the
LG-array macros, mostly the fixup_cmdtable() calls are now passed the
ll_entry_start and ll_entry_count instead of linker-generated symbols.

The command.c had to be adjusted as well so it would use the newly
introduced LG-array API instead of directly using linker-generated
symbols.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Joe Hershberger <joe.hershberger@gmail.com>
Cc: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Marek Vasut
2012-10-12 10:27:04 +00:00
committed by Tom Rini
parent 556751427b
commit 6c7c946cad
10 changed files with 50 additions and 42 deletions
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10
doc/README.commands
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@@ -15,12 +15,12 @@ help: Long description. This is a string
**** Behind the scene ******
The structure created is named with a special prefix (__u_boot_cmd_)
The structure created is named with a special prefix (__u_boot_list_cmd_)
and placed by the linker in a special section.
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 can be found in an array starting at __u_boot_cmd_start.
command can be found in an array starting at _u_boot_list_cmd__start.
To ensure that the linker does not discard these symbols when linking
full U-Boot we generate a list of all the commands we have built (based
@@ -33,6 +33,6 @@ If a new board is defined do not forget to define the command section
by writing in u-boot.lds ($(TOPDIR)/board/boardname/u-boot.lds) these
3 lines:
__u_boot_cmd_start = .;
.u_boot_cmd : { *(.u_boot_cmd) }
__u_boot_cmd_end = .;
.u_boot_list : {
#include "u-boot.lst";
}