usr/src/sbin/enpload/enpload.c

/*
 * Copyright (c) 1988 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Computer Consoles Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1988 The Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)enpload.c   5.4 (Berkeley) 1/14/91";
#endif /* not lint */

/*
 * CMC Ethernet ``Microcode'' Loader.
 */
#include <sys/types.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <tahoe/if/if_enpreg.h>
#include <stdio.h>
#include <a.out.h>

char    *dev;

main(argc, argv)
        int argc;
        char *argv[];
{
        int enp = -1, fd, first = 1, nostart = 0;

        argc--, argv++;
        if (argc > 0) {
                enp = open(dev = argv[0], O_RDWR);
                if (enp < 0) {
                        fprintf(stderr, "enpload: ");
                        perror(dev);
                        exit(-1);
                }
                argc--, argv++;
        }
        for (; argc > 0; argc--, argv++) {
                if (strcmp(argv[0], "-s") == 0 || strcmp(argv[0], "-S") == 0) {
                        nostart++;
                        continue;
                }
                if (first) {
                        /*
                         * Reset device before first file is loaded.
                         */
                        if (ioctl(enp, ENPIORESET) < 0) {
                                fprintf(stderr, "enpload: %s: ", dev);
                                perror("ioctl (ENPIORESET)");
                                exit(-1);
                        }
                        first = !first;
                }
                if ((fd = open(argv[0], O_RDONLY)) < 0) {
                        fprintf(stderr, "enpload: "), perror(argv[0]);
                        exit(1);
                }
                enpload(enp, fd, argv[0]);
                close(fd);
        }
        if (enp != -1 && !nostart && ioctl(enp, ENPIOGO) < 0) {
                fprintf(stderr, "enpload: ");
                perror("ioctl (ENPIOGO)");
                exit(-1);
        }
        exit(0);
}

#define RELO            0x03FFFF        /* relocation offset */
#define ENPMSTART       0x0             /* start of memory */
#define BSIZE           512             /* buffer size */
char    buff[BSIZE];
char    zbuf[BSIZE];

enpload(enp, fd, filename)
        int enp, fd;
        char *filename;
{
        int cnt, size, lstart;
        struct exec hdr;

        if (read(fd, &hdr, sizeof (hdr)) != sizeof (hdr)) {
                fprintf(stderr, "enpload: %s: Read short (header).\n",
                   filename);
                exit(1);
        }
        if (N_BADMAG(hdr)) {
                fprintf(stderr, "enpload: %s: Bad magic number.\n", filename);
                exit(1);
        }
        size = hdr.a_text + hdr.a_data;
        lstart = (ENPMSTART + (hdr.a_entry & RELO)) - 0x1000;

        printf("%s: Loading %s...", dev, filename);
        (void) lseek(enp, lstart + size, L_SET);
        while (hdr.a_bss >= BSIZE) {
                if (write(enp, zbuf, BSIZE) != BSIZE) {
                        fprintf(stderr, "enpload: Bss write error.\n");
                        exit(-1);
                }
                hdr.a_bss -= BSIZE;
        }
        if (hdr.a_bss > 0 && write(enp, zbuf, hdr.a_bss) != hdr.a_bss) {
                fprintf(stderr, "enpload: Bss write error.\n");
                exit(-1);
        }
        (void) lseek(enp, lstart, L_SET);
        while (size > BSIZE) {
                cnt = read(fd, buff, BSIZE);
                size -= cnt;
                if (write(enp, buff, cnt) != cnt) {
                        fprintf(stderr, "enpload: Write error.\n");
                        exit(-1);
                }
        }
        if (size > 0) {
                cnt = read(fd, buff, size);
                if (write(enp, buff, cnt) != cnt) {
                        fprintf(stderr, "enpload: Write error.\n");
                        exit(-1);
                }
        }
        printf("done.\n");
}