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121 lines
3.3 KiB
C
121 lines
3.3 KiB
C
/*
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* (C) Copyright 2001
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* Erik Theisen, Wave 7 Optics, etheisen@mindspring.com.
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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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* IBM 4XX DCR Functions
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*/
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#include <common.h>
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#include <config.h>
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#include <command.h>
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#if defined(CONFIG_4xx) && (CONFIG_COMMANDS & CFG_CMD_SETGETDCR)
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/* ======================================================================
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* Interpreter command to retrieve an IBM PPC 4xx Device Control Register
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* ======================================================================
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*/
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int do_getdcr ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[] )
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{
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unsigned short dcrn; /* Device Control Register Num */
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unsigned long value; /* DCR's value */
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unsigned long get_dcr(unsigned short);
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/* Validate arguments */
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if (argc < 2) {
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printf("Usage:\n%s\n", cmdtp->usage);
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return 1;
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}
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/* Get a DCR */
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dcrn = (unsigned short)simple_strtoul(argv[ 1 ], NULL, 16);
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value = get_dcr(dcrn);
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printf("%04x: %08lx\n", dcrn, value);
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return 0;
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} /* do_getdcr */
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/* ======================================================================
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* Interpreter command to set an IBM PPC 4xx Device Control Register
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* ======================================================================
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*/
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int do_setdcr ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
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{
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unsigned long get_dcr(unsigned short );
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unsigned long set_dcr(unsigned short , unsigned long );
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unsigned short dcrn; /* Device Control Register Num */
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unsigned long value;
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/* DCR's value */
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int nbytes;
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extern char console_buffer[];
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/* Validate arguments */
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if (argc < 2) {
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printf("Usage:\n%s\n", cmdtp->usage);
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return 1;
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}
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/* Set a DCR */
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dcrn = (unsigned short)simple_strtoul(argv[1], NULL, 16);
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do {
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value = get_dcr(dcrn);
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printf("%04x: %08lx", dcrn, value);
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nbytes = readline(" ? ");
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if (nbytes == 0) {
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/*
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* <CR> pressed as only input, don't modify current
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* location and exit command.
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*/
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nbytes = 1;
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return 0;
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} else {
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unsigned long i;
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char *endp;
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i = simple_strtoul(console_buffer, &endp, 16);
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nbytes = endp - console_buffer;
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if (nbytes)
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set_dcr(dcrn, i);
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}
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} while (nbytes);
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return 0;
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} /* do_setdcr */
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/***************************************************/
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U_BOOT_CMD(
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getdcr, 2, 1, do_getdcr,
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"getdcr - Get an IBM PPC 4xx DCR's value\n",
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"dcrn - return a DCR's value.\n"
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);
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U_BOOT_CMD(
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setdcr, 2, 1, do_setdcr,
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"setdcr - Set an IBM PPC 4xx DCR's value\n",
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"dcrn - set a DCR's value.\n"
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);
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#endif /* CONFIG_4xx & CFG_CMD_SETGETDCR */
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