/* $OpenBSD: cmd_i386.c,v 1.37 2022/03/29 13:57:53 deraadt Exp $ */ /* * Copyright (c) 1997-1999 Michael Shalayeff * Copyright (c) 1997 Tobias Weingartner * All rights reserved. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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. * */ #include #include #include #include #include "disk.h" #include "debug.h" #include "biosdev.h" #include "libsa.h" #include #ifdef EFIBOOT #include "efiboot.h" #endif extern const char version[]; int Xboot(void); int Xcomaddr(void); int Xdiskinfo(void); int Xmemory(void); int Xregs(void); /* From gidt.S */ int bootbuf(void *, int); const struct cmd_table cmd_machine[] = { { "boot", CMDT_CMD, Xboot }, { "comaddr", CMDT_CMD, Xcomaddr }, { "diskinfo", CMDT_CMD, Xdiskinfo }, { "memory", CMDT_CMD, Xmemory }, #ifdef EFIBOOT { "video", CMDT_CMD, Xvideo_efi }, { "exit", CMDT_CMD, Xexit_efi }, { "poweroff", CMDT_CMD, Xpoweroff_efi }, #endif #ifdef DEBUG { "regs", CMDT_CMD, Xregs }, #endif { NULL, 0 } }; int Xdiskinfo(void) { dump_diskinfo(); return 0; } #ifdef DEBUG int Xregs(void) { DUMP_REGS; return 0; } #endif int Xboot(void) { #ifdef EFIBOOT printf("Not supported yet\n"); #else int dev, part, st; struct diskinfo *dip; char buf[DEV_BSIZE], *dest = (void *)BOOTBIOS_ADDR; if (cmd.argc != 2) { printf("machine boot {fd,hd}<0123>[abcd]\n"); printf("Where [0123] is the disk number," " and [abcd] is the partition.\n"); return 0; } /* Check arg */ if (cmd.argv[1][0] != 'f' && cmd.argv[1][0] != 'h') goto bad; if (cmd.argv[1][1] != 'd') goto bad; if (cmd.argv[1][2] < '0' || cmd.argv[1][2] > '3') goto bad; if ((cmd.argv[1][3] < 'a' || cmd.argv[1][3] > 'd') && cmd.argv[1][3] != '\0') goto bad; printf("Booting from %s ", cmd.argv[1]); dev = (cmd.argv[1][0] == 'h')?0x80:0; dev += (cmd.argv[1][2] - '0'); part = (cmd.argv[1][3] - 'a'); if (part >= 0) printf("[%x,%d]\n", dev, part); else printf("[%x]\n", dev); /* Read boot sector from device */ dip = dklookup(dev); st = dip->diskio(F_READ, dip, 0, 1, buf); if (st) goto bad; /* Frob boot flag in buffer from HD */ if ((dev & 0x80) && (part >= 0)) { int i, j; for (i = 0, j = DOSPARTOFF; i < 4; i++, j += 16) if (part == i) buf[j] |= 0x80; else buf[j] &= ~0x80; } /* Load %dl, ljmp */ bcopy(buf, dest, DEV_BSIZE); bootbuf(dest, dev); bad: printf("Invalid device!\n"); #endif return 0; } int Xmemory(void) { if (cmd.argc >= 2) { int i; /* parse the memory specs */ for (i = 1; i < cmd.argc; i++) { char *p; long long addr, size; p = cmd.argv[i]; size = strtoll(p + 1, &p, 0); /* Size the size */ switch (*p) { case 'G': case 'g': size *= 1024; case 'M': case 'm': size *= 1024; case 'K': case 'k': size *= 1024; p++; } /* Handle (possibly non-existent) address part */ switch (*p) { case '@': addr = strtoll(p + 1, NULL, 0); break; /* Adjust address if we don't need it */ default: if (cmd.argv[i][0] == '=') addr = -1; else addr = 0; } if (addr == 0 || size == 0) { printf("bad language\n"); return 0; } else { switch (cmd.argv[i][0]) { case '-': mem_delete(addr, addr + size); break; case '+': mem_add(addr, addr + size); break; case '=': mem_limit(size); break; default : printf("bad OP\n"); return 0; } } } } dump_biosmem(NULL); return 0; } int Xcomaddr(void) { extern int com_addr; if (cmd.argc >= 2) com_addr = (int)strtol(cmd.argv[1], NULL, 0); return 0; }