By now, the majority of architectures have working relocation support, so the few remaining architectures have become exceptions. To make this more obvious, we make working relocation now the default case, and flag the remaining cases with CONFIG_NEEDS_MANUAL_RELOC. Signed-off-by: Wolfgang Denk <wd@denx.de> Tested-by: Heiko Schocher <hs@denx.de> Tested-by: Reinhard Meyer <u-boot@emk-elektronik.de>
505 lines
11 KiB
C
505 lines
11 KiB
C
/*
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* (C) Copyright 2000-2009
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* Command Processor Table
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*/
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#include <common.h>
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#include <command.h>
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/*
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* Use puts() instead of printf() to avoid printf buffer overflow
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* for long help messages
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*/
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int _do_help (cmd_tbl_t *cmd_start, int cmd_items, cmd_tbl_t * cmdtp, int
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flag, int argc, char * const argv[])
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{
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int i;
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int rcode = 0;
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if (argc == 1) { /*show list of commands */
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cmd_tbl_t *cmd_array[cmd_items];
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int i, j, swaps;
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/* Make array of commands from .uboot_cmd section */
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cmdtp = cmd_start;
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for (i = 0; i < cmd_items; i++) {
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cmd_array[i] = cmdtp++;
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}
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/* Sort command list (trivial bubble sort) */
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for (i = cmd_items - 1; i > 0; --i) {
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swaps = 0;
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for (j = 0; j < i; ++j) {
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if (strcmp (cmd_array[j]->name,
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cmd_array[j + 1]->name) > 0) {
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cmd_tbl_t *tmp;
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tmp = cmd_array[j];
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cmd_array[j] = cmd_array[j + 1];
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cmd_array[j + 1] = tmp;
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++swaps;
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}
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}
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if (!swaps)
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break;
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}
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/* print short help (usage) */
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for (i = 0; i < cmd_items; i++) {
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const char *usage = cmd_array[i]->usage;
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/* allow user abort */
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if (ctrlc ())
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return 1;
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if (usage == NULL)
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continue;
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printf("%-*s- %s\n", CONFIG_SYS_HELP_CMD_WIDTH,
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cmd_array[i]->name, usage);
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}
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return 0;
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}
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/*
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* command help (long version)
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*/
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for (i = 1; i < argc; ++i) {
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if ((cmdtp = find_cmd_tbl (argv[i], cmd_start, cmd_items )) != NULL) {
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rcode |= cmd_usage(cmdtp);
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} else {
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printf ("Unknown command '%s' - try 'help'"
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" without arguments for list of all"
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" known commands\n\n", argv[i]
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);
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rcode = 1;
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}
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}
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return rcode;
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}
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/***************************************************************************
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* find command table entry for a command
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*/
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cmd_tbl_t *find_cmd_tbl (const char *cmd, cmd_tbl_t *table, int table_len)
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{
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cmd_tbl_t *cmdtp;
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cmd_tbl_t *cmdtp_temp = table; /*Init value */
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const char *p;
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int len;
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int n_found = 0;
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/*
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* Some commands allow length modifiers (like "cp.b");
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* compare command name only until first dot.
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*/
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len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd);
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for (cmdtp = table;
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cmdtp != table + table_len;
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cmdtp++) {
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if (strncmp (cmd, cmdtp->name, len) == 0) {
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if (len == strlen (cmdtp->name))
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return cmdtp; /* full match */
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cmdtp_temp = cmdtp; /* abbreviated command ? */
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n_found++;
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}
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}
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if (n_found == 1) { /* exactly one match */
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return cmdtp_temp;
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}
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return NULL; /* not found or ambiguous command */
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}
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cmd_tbl_t *find_cmd (const char *cmd)
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{
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int len = &__u_boot_cmd_end - &__u_boot_cmd_start;
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return find_cmd_tbl(cmd, &__u_boot_cmd_start, len);
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}
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int cmd_usage(cmd_tbl_t *cmdtp)
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{
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printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);
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#ifdef CONFIG_SYS_LONGHELP
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printf("Usage:\n%s ", cmdtp->name);
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if (!cmdtp->help) {
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puts ("- No additional help available.\n");
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return 1;
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}
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puts (cmdtp->help);
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putc ('\n');
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#endif /* CONFIG_SYS_LONGHELP */
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return 1;
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}
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#ifdef CONFIG_AUTO_COMPLETE
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int var_complete(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
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{
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#if 0 /* need to reimplement */
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static char tmp_buf[512];
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int space;
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space = last_char == '\0' || last_char == ' ' || last_char == '\t';
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if (space && argc == 1)
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return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf);
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if (!space && argc == 2)
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return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf);
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#endif
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return 0;
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}
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static void install_auto_complete_handler(const char *cmd,
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int (*complete)(int argc, char * const argv[], char last_char, int maxv, char *cmdv[]))
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{
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cmd_tbl_t *cmdtp;
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cmdtp = find_cmd(cmd);
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if (cmdtp == NULL)
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return;
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cmdtp->complete = complete;
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}
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void install_auto_complete(void)
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{
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#if defined(CONFIG_CMD_EDITENV)
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install_auto_complete_handler("editenv", var_complete);
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#endif
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install_auto_complete_handler("printenv", var_complete);
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install_auto_complete_handler("setenv", var_complete);
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#if defined(CONFIG_CMD_RUN)
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install_auto_complete_handler("run", var_complete);
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#endif
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}
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/*************************************************************************************/
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static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
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{
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cmd_tbl_t *cmdtp;
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const char *p;
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int len, clen;
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int n_found = 0;
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const char *cmd;
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/* sanity? */
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if (maxv < 2)
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return -2;
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cmdv[0] = NULL;
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if (argc == 0) {
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/* output full list of commands */
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for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
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if (n_found >= maxv - 2) {
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cmdv[n_found++] = "...";
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break;
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}
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cmdv[n_found++] = cmdtp->name;
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}
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cmdv[n_found] = NULL;
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return n_found;
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}
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/* more than one arg or one but the start of the next */
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if (argc > 1 || (last_char == '\0' || last_char == ' ' || last_char == '\t')) {
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cmdtp = find_cmd(argv[0]);
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if (cmdtp == NULL || cmdtp->complete == NULL) {
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cmdv[0] = NULL;
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return 0;
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}
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return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
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}
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cmd = argv[0];
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/*
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* Some commands allow length modifiers (like "cp.b");
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* compare command name only until first dot.
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*/
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p = strchr(cmd, '.');
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if (p == NULL)
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len = strlen(cmd);
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else
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len = p - cmd;
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/* return the partial matches */
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for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
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clen = strlen(cmdtp->name);
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if (clen < len)
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continue;
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if (memcmp(cmd, cmdtp->name, len) != 0)
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continue;
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/* too many! */
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if (n_found >= maxv - 2) {
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cmdv[n_found++] = "...";
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break;
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}
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cmdv[n_found++] = cmdtp->name;
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}
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cmdv[n_found] = NULL;
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return n_found;
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}
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static int make_argv(char *s, int argvsz, char *argv[])
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{
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int argc = 0;
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/* split into argv */
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while (argc < argvsz - 1) {
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/* skip any white space */
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while ((*s == ' ') || (*s == '\t'))
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++s;
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if (*s == '\0') /* end of s, no more args */
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break;
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argv[argc++] = s; /* begin of argument string */
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/* find end of string */
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while (*s && (*s != ' ') && (*s != '\t'))
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++s;
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if (*s == '\0') /* end of s, no more args */
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break;
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*s++ = '\0'; /* terminate current arg */
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}
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argv[argc] = NULL;
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return argc;
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}
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static void print_argv(const char *banner, const char *leader, const char *sep, int linemax, char * const argv[])
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{
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int ll = leader != NULL ? strlen(leader) : 0;
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int sl = sep != NULL ? strlen(sep) : 0;
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int len, i;
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if (banner) {
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puts("\n");
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puts(banner);
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}
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i = linemax; /* force leader and newline */
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while (*argv != NULL) {
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len = strlen(*argv) + sl;
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if (i + len >= linemax) {
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puts("\n");
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if (leader)
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puts(leader);
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i = ll - sl;
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} else if (sep)
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puts(sep);
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puts(*argv++);
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i += len;
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}
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printf("\n");
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}
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static int find_common_prefix(char * const argv[])
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{
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int i, len;
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char *anchor, *s, *t;
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if (*argv == NULL)
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return 0;
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/* begin with max */
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anchor = *argv++;
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len = strlen(anchor);
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while ((t = *argv++) != NULL) {
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s = anchor;
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for (i = 0; i < len; i++, t++, s++) {
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if (*t != *s)
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break;
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}
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len = s - anchor;
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}
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return len;
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}
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static char tmp_buf[CONFIG_SYS_CBSIZE]; /* copy of console I/O buffer */
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int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp)
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{
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int n = *np, col = *colp;
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char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
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char *cmdv[20];
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char *s, *t;
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const char *sep;
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int i, j, k, len, seplen, argc;
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int cnt;
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char last_char;
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if (strcmp(prompt, CONFIG_SYS_PROMPT) != 0)
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return 0; /* not in normal console */
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cnt = strlen(buf);
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if (cnt >= 1)
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last_char = buf[cnt - 1];
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else
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last_char = '\0';
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/* copy to secondary buffer which will be affected */
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strcpy(tmp_buf, buf);
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/* separate into argv */
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argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
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/* do the completion and return the possible completions */
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i = complete_cmdv(argc, argv, last_char, sizeof(cmdv)/sizeof(cmdv[0]), cmdv);
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/* no match; bell and out */
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if (i == 0) {
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if (argc > 1) /* allow tab for non command */
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return 0;
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putc('\a');
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return 1;
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}
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s = NULL;
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len = 0;
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sep = NULL;
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seplen = 0;
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if (i == 1) { /* one match; perfect */
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k = strlen(argv[argc - 1]);
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s = cmdv[0] + k;
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len = strlen(s);
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sep = " ";
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seplen = 1;
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} else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */
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k = strlen(argv[argc - 1]);
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j -= k;
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if (j > 0) {
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s = cmdv[0] + k;
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len = j;
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}
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}
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if (s != NULL) {
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k = len + seplen;
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/* make sure it fits */
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if (n + k >= CONFIG_SYS_CBSIZE - 2) {
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putc('\a');
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return 1;
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}
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t = buf + cnt;
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for (i = 0; i < len; i++)
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*t++ = *s++;
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if (sep != NULL)
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for (i = 0; i < seplen; i++)
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*t++ = sep[i];
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*t = '\0';
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n += k;
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col += k;
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puts(t - k);
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if (sep == NULL)
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putc('\a');
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*np = n;
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*colp = col;
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} else {
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print_argv(NULL, " ", " ", 78, cmdv);
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puts(prompt);
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puts(buf);
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}
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return 1;
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}
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#endif
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#ifdef CMD_DATA_SIZE
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int cmd_get_data_size(char* arg, int default_size)
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{
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/* Check for a size specification .b, .w or .l.
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*/
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int len = strlen(arg);
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if (len > 2 && arg[len-2] == '.') {
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switch(arg[len-1]) {
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case 'b':
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return 1;
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case 'w':
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return 2;
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case 'l':
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return 4;
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case 's':
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return -2;
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default:
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return -1;
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}
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}
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return default_size;
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}
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#endif
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#if defined(CONFIG_NEEDS_MANUAL_RELOC)
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DECLARE_GLOBAL_DATA_PTR;
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void fixup_cmdtable(cmd_tbl_t *cmdtp, int size)
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{
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int i;
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if (gd->reloc_off == 0)
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return;
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for (i = 0; i < size; i++) {
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ulong addr;
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addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
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#if DEBUG_COMMANDS
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printf("Command \"%s\": 0x%08lx => 0x%08lx\n",
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cmdtp->name, (ulong) (cmdtp->cmd), addr);
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#endif
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cmdtp->cmd =
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(int (*)(struct cmd_tbl_s *, int, int, char * const []))addr;
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addr = (ulong)(cmdtp->name) + gd->reloc_off;
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cmdtp->name = (char *)addr;
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if (cmdtp->usage) {
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addr = (ulong)(cmdtp->usage) + gd->reloc_off;
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cmdtp->usage = (char *)addr;
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}
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#ifdef CONFIG_SYS_LONGHELP
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if (cmdtp->help) {
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addr = (ulong)(cmdtp->help) + gd->reloc_off;
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cmdtp->help = (char *)addr;
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}
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#endif
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cmdtp++;
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}
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}
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#endif
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