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

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>

diff --git a/arch/arm/imx-common/cmd_bmode.c b/arch/arm/imx-common/cmd_bmode.c
index 02fe72e..ddc14b0 100644 (file)
--- a/arch/arm/imx-common/cmd_bmode.c
+++ b/arch/arm/imx-common/cmd_bmode.c
@@ -24,6 +24,7 @@
 #include <asm/io.h>
 #include <asm/imx-common/boot_mode.h>
 #include <malloc.h>
+#include <command.h>
 
 static const struct boot_mode *modes[2];
 
@@ -103,9 +104,11 @@ void add_board_boot_modes(const struct boot_mode *p)
        int size;
        char *dest;
 
-       if (__u_boot_cmd_bmode.usage) {
-               free(__u_boot_cmd_bmode.usage);
-               __u_boot_cmd_bmode.usage = NULL;
+       cmd_tbl_t *entry = ll_entry_get(cmd_tbl_t, bmode, cmd);
+
+       if (entry->usage) {
+               free(entry->usage);
+               entry->usage = NULL;
        }
 
        modes[0] = p;
@@ -114,6 +117,6 @@ void add_board_boot_modes(const struct boot_mode *p)
        dest = malloc(size);
        if (dest) {
                create_usage(dest);
-               __u_boot_cmd_bmode.usage = dest;
+               entry->usage = dest;
        }
 }

diff --git a/arch/avr32/lib/board.c b/arch/avr32/lib/board.c
index 9d3b76e..e3287c4 100644 (file)
--- a/arch/avr32/lib/board.c
+++ b/arch/avr32/lib/board.c
@@ -272,8 +272,8 @@ void board_init_r(gd_t *new_gd, ulong dest_addr)
        /*
         * We have to relocate the command table manually
         */
-       fixup_cmdtable(&__u_boot_cmd_start,
-               (ulong)(&__u_boot_cmd_end - &__u_boot_cmd_start));
+       fixup_cmdtable(ll_entry_start(cmd_tbl_t, cmd),
+                       ll_entry_count(cmd_tbl_t, cmd));
 #endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */
 
        /* there are some other pointer constants we must deal with */

diff --git a/arch/m68k/lib/board.c b/arch/m68k/lib/board.c
index 92f935b..02d73fd 100644 (file)
--- a/arch/m68k/lib/board.c
+++ b/arch/m68k/lib/board.c
@@ -416,8 +416,8 @@ void board_init_r (gd_t *id, ulong dest_addr)
        /*
         * We have to relocate the command table manually
         */
-       fixup_cmdtable(&__u_boot_cmd_start,
-               (ulong)(&__u_boot_cmd_end - &__u_boot_cmd_start));
+       fixup_cmdtable(ll_entry_start(cmd_tbl_t, cmd),
+                       ll_entry_count(cmd_tbl_t, cmd));
 #endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */
 
        /* there are some other pointer constants we must deal with */

diff --git a/arch/mips/lib/board.c b/arch/mips/lib/board.c
index b14b33e..7ddd778 100644 (file)
--- a/arch/mips/lib/board.c
+++ b/arch/mips/lib/board.c
@@ -266,8 +266,8 @@ void board_init_r(gd_t *id, ulong dest_addr)
        /*
         * We have to relocate the command table manually
         */
-       fixup_cmdtable(&__u_boot_cmd_start,
-               (ulong)(&__u_boot_cmd_end - &__u_boot_cmd_start));
+       fixup_cmdtable(ll_entry_start(cmd_tbl_t, cmd),
+                       ll_entry_count(cmd_tbl_t, cmd));
 #endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */
 
        /* there are some other pointer constants we must deal with */

diff --git a/arch/nds32/lib/board.c b/arch/nds32/lib/board.c
index 875f220..91395ca 100644 (file)
--- a/arch/nds32/lib/board.c
+++ b/arch/nds32/lib/board.c
@@ -320,8 +320,8 @@ void board_init_r(gd_t *id, ulong dest_addr)
        /*
         * We have to relocate the command table manually
         */
-       fixup_cmdtable(&__u_boot_cmd_start,
-               (ulong)(&__u_boot_cmd_end - &__u_boot_cmd_start));
+       fixup_cmdtable(ll_entry_start(cmd_tbl_t, cmd),
+                       ll_entry_count(cmd_tbl_t, cmd));
 #endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */
 
        serial_initialize();

diff --git a/arch/sparc/lib/board.c b/arch/sparc/lib/board.c
index ff0e0f2..32d025a 100644 (file)
--- a/arch/sparc/lib/board.c
+++ b/arch/sparc/lib/board.c
@@ -246,8 +246,8 @@ void board_init_f(ulong bootflag)
        /*
         * We have to relocate the command table manually
         */
-       fixup_cmdtable(&__u_boot_cmd_start,
-               (ulong)(&__u_boot_cmd_end - &__u_boot_cmd_start));
+       fixup_cmdtable(ll_entry_start(cmd_tbl_t, cmd),
+                       ll_entry_count(cmd_tbl_t, cmd));
 #endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */
 
 #if defined(CONFIG_CMD_AMBAPP) && defined(CONFIG_SYS_AMBAPP_PRINT_ON_STARTUP)

diff --git a/common/cmd_help.c b/common/cmd_help.c
index 8c8178e..3178a1a 100644 (file)
--- a/common/cmd_help.c
+++ b/common/cmd_help.c
@@ -26,9 +26,9 @@
 
 int do_help(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
 {
-       return _do_help(&__u_boot_cmd_start,
-                       &__u_boot_cmd_end - &__u_boot_cmd_start,
-                       cmdtp, flag, argc, argv);
+       cmd_tbl_t *start = ll_entry_start(cmd_tbl_t, cmd);
+       const int len = ll_entry_count(cmd_tbl_t, cmd);
+       return _do_help(start, len, cmdtp, flag, argc, argv);
 }
 
 U_BOOT_CMD(
@@ -41,7 +41,7 @@ U_BOOT_CMD(
 );
 
 /* This does not use the U_BOOT_CMD macro as ? can't be used in symbol names */
-cmd_tbl_t __u_boot_cmd_question_mark Struct_Section = {
+ll_entry_declare(cmd_tbl_t, question_mark, cmd, cmd) = {
        "?",    CONFIG_SYS_MAXARGS,     1,      do_help,
        "alias for 'help'",
 #ifdef  CONFIG_SYS_LONGHELP

diff --git a/common/command.c b/common/command.c
index aa0fb0a..50c8429 100644 (file)
--- a/common/command.c
+++ b/common/command.c
@@ -137,8 +137,9 @@ cmd_tbl_t *find_cmd_tbl (const char *cmd, cmd_tbl_t *table, int table_len)
 
 cmd_tbl_t *find_cmd (const char *cmd)
 {
-       int len = &__u_boot_cmd_end - &__u_boot_cmd_start;
-       return find_cmd_tbl(cmd, &__u_boot_cmd_start, len);
+       cmd_tbl_t *start = ll_entry_start(cmd_tbl_t, cmd);
+       const int len = ll_entry_count(cmd_tbl_t, cmd);
+       return find_cmd_tbl(cmd, start, len);
 }
 
 int cmd_usage(const cmd_tbl_t *cmdtp)
@@ -181,7 +182,9 @@ int var_complete(int argc, char * const argv[], char last_char, int maxv, char *
 
 static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
 {
-       cmd_tbl_t *cmdtp;
+       cmd_tbl_t *cmdtp = ll_entry_start(cmd_tbl_t, cmd);
+       const int count = ll_entry_count(cmd_tbl_t, cmd);
+       const cmd_tbl_t *cmdend = cmdtp + count;
        const char *p;
        int len, clen;
        int n_found = 0;
@@ -195,12 +198,12 @@ static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv
 
        if (argc == 0) {
                /* output full list of commands */
-               for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
+               for (; cmdtp != cmdend; cmdtp++) {
                        if (n_found >= maxv - 2) {
-                               cmdv[n_found++] = "...";
+                               cmdv[n_found] = "...";
                                break;
                        }
-                       cmdv[n_found++] = cmdtp->name;
+                       cmdv[n_found] = cmdtp->name;
                }
                cmdv[n_found] = NULL;
                return n_found;
@@ -228,7 +231,7 @@ static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv
                len = p - cmd;
 
        /* return the partial matches */
-       for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
+       for (; cmdtp != cmdend; cmdtp++) {
 
                clen = strlen(cmdtp->name);
                if (clen < len)

diff --git a/doc/README.commands b/doc/README.commands
index 125f077..923418b 100644 (file)
--- a/doc/README.commands
+++ b/doc/README.commands
@@ -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";
+       }

diff --git a/include/command.h b/include/command.h
index 1f06aa1..24864d5 100644 (file)
--- a/include/command.h
+++ b/include/command.h
@@ -28,6 +28,7 @@
 #define __COMMAND_H
 
 #include <config.h>
+#include <linker_lists.h>
 
 #ifndef NULL
 #define NULL   0
@@ -153,9 +154,6 @@ int cmd_process(int flag, int argc, char * const argv[],
 #define CMD_FLAG_REPEAT                0x0001  /* repeat last command          */
 #define CMD_FLAG_BOOTD         0x0002  /* command is from bootd        */
 
-#define Struct_Section  __attribute__((unused, section(".u_boot_cmd"), \
-               aligned(4)))
-
 #ifdef CONFIG_AUTO_COMPLETE
 # define _CMD_COMPLETE(x) x,
 #else
@@ -167,18 +165,22 @@ int cmd_process(int flag, int argc, char * const argv[],
 # define _CMD_HELP(x)
 #endif
 
-#define U_BOOT_CMD_MKENT_COMPLETE(name,maxargs,rep,cmd,usage,help,comp) \
-       {#name, maxargs, rep, cmd, usage, _CMD_HELP(help) _CMD_COMPLETE(comp)}
+#define U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd,         \
+                               _usage, _help, _comp)                   \
+               { #_name, _maxargs, _rep, _cmd, _usage,                 \
+                       _CMD_HELP(_help) _CMD_COMPLETE(_comp) }
 
-#define U_BOOT_CMD_MKENT(name,maxargs,rep,cmd,usage,help) \
-       U_BOOT_CMD_MKENT_COMPLETE(name,maxargs,rep,cmd,usage,help,NULL)
+#define U_BOOT_CMD_MKENT(_name, _maxargs, _rep, _cmd, _usage, _help)   \
+       U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd,          \
+                                       _usage, _help, NULL)
 
-#define U_BOOT_CMD_COMPLETE(name,maxargs,rep,cmd,usage,help,comp) \
-       cmd_tbl_t __u_boot_cmd_##name Struct_Section = \
-               U_BOOT_CMD_MKENT_COMPLETE(name,maxargs,rep,cmd,usage,help,comp)
+#define U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, _comp) \
+       ll_entry_declare(cmd_tbl_t, _name, cmd, cmd) =                  \
+               U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd,  \
+                                               _usage, _help, _comp);
 
-#define U_BOOT_CMD(name,maxargs,rep,cmd,usage,help) \
-       U_BOOT_CMD_COMPLETE(name,maxargs,rep,cmd,usage,help,NULL)
+#define U_BOOT_CMD(_name, _maxargs, _rep, _cmd, _usage, _help)         \
+       U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, NULL)
 
 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
 void fixup_cmdtable(cmd_tbl_t *cmdtp, int size);