/*- * Copyright (c) 1998 Michael Smith * 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 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 AUTHOR 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. * * $FreeBSD$ */ /* * MD bootstrap main() and assorted miscellaneous * commands. */ #include #include #include #include #include "bootstrap.h" #include "libi386/libi386.h" #include "btxv86.h" #define KARGS_FLAGS_CD 0x1 #define KARGS_FLAGS_PXE 0x2 /* Arguments passed in from the boot1/boot2 loader */ static struct { u_int32_t howto; u_int32_t bootdev; u_int32_t bootflags; u_int32_t pxeinfo; u_int32_t res2; u_int32_t bootinfo; } *kargs; static u_int32_t initial_howto; static u_int32_t initial_bootdev; static struct bootinfo *initial_bootinfo; struct arch_switch archsw; /* MI/MD interface boundary */ static void extract_currdev(void); static int isa_inb(int port); static void isa_outb(int port, int value); /* from vers.c */ extern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[]; /* XXX debugging */ extern char end[]; /* XXX - I dont know why we have to do this, but it helps. */ #if defined(LOADER_NFS_SUPPORT) || defined(LOADER_TFTP_SUPPORT) char Heap[200*1024]; #endif void main(void) { int i; /* Pick up arguments */ kargs = (void *)__args; initial_howto = kargs->howto; initial_bootdev = kargs->bootdev; initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; /* * Initialise the heap as early as possible. Once this is done, malloc() is usable. */ bios_getmem(); /* XXX - I dont know why we have to do this, but it helps PXE. */ #if defined(LOADER_NFS_SUPPORT) || defined(LOADER_TFTP_SUPPORT) setheap(Heap, Heap+sizeof(Heap)); #else setheap((void *)end, (void *)bios_basemem); #endif /* * XXX Chicken-and-egg problem; we want to have console output early, but some * console attributes may depend on reading from eg. the boot device, which we * can't do yet. * * We can use printf() etc. once this is done. * If the previous boot stage has requested a serial console, prefer that. */ if (initial_howto & RB_SERIAL) setenv("console", "comconsole", 1); cons_probe(); /* * Initialise the block cache */ bcache_init(32, 512); /* 16k cache XXX tune this */ /* * We only want the PXE disk to try to init itself in the below walk through * devsw if we actually booted off of PXE. */ if((kargs->bootinfo == NULL) && ((kargs->bootflags & KARGS_FLAGS_PXE) != 0)) { pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); } /* * March through the device switch probing for things. */ for (i = 0; devsw[i] != NULL; i++) if (devsw[i]->dv_init != NULL) (devsw[i]->dv_init)(); printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); printf("\n"); printf("%s, Revision %s\n", bootprog_name, bootprog_rev); printf("(%s, %s)\n", bootprog_maker, bootprog_date); extract_currdev(); /* set $currdev and $loaddev */ setenv("LINES", "24", 1); /* optional */ archsw.arch_autoload = i386_autoload; archsw.arch_getdev = i386_getdev; archsw.arch_copyin = i386_copyin; archsw.arch_copyout = i386_copyout; archsw.arch_readin = i386_readin; archsw.arch_isainb = isa_inb; archsw.arch_isaoutb = isa_outb; interact(); /* doesn't return */ } /* * Set the 'current device' by (if possible) recovering the boot device as * supplied by the initial bootstrap. * * XXX should be extended for netbooting. */ static void extract_currdev(void) { struct i386_devdesc currdev; int major, biosdev; /* Assume we are booting from a BIOS disk by default */ currdev.d_dev = &biosdisk; currdev.d_type = currdev.d_dev->dv_type; /* new-style boot loaders such as pxeldr and cdldr */ if (kargs->bootinfo == NULL) { if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { /* we are booting from a CD with cdldr */ currdev.d_kind.biosdisk.slice = -1; currdev.d_kind.biosdisk.partition = 0; biosdev = initial_bootdev; } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { /* we are booting from pxeldr */ currdev.d_dev = &pxedisk; currdev.d_type = currdev.d_dev->dv_type; currdev.d_kind.netif.unit = 0; } else { /* we don't know what our boot device is */ currdev.d_kind.biosdisk.slice = -1; currdev.d_kind.biosdisk.partition = 0; biosdev = -1; } } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { /* The passed-in boot device is bad */ currdev.d_kind.biosdisk.slice = -1; currdev.d_kind.biosdisk.partition = 0; biosdev = -1; } else { currdev.d_kind.biosdisk.slice = (B_ADAPTOR(initial_bootdev) << 4) + B_CONTROLLER(initial_bootdev) - 1; currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); biosdev = initial_bootinfo->bi_bios_dev; major = B_TYPE(initial_bootdev); /* * If we are booted by an old bootstrap, we have to guess at the BIOS * unit number. We will loose if there is more than one disk type * and we are not booting from the lowest-numbered disk type * (ie. SCSI when IDE also exists). */ #ifdef PC98 if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) { /* biosdev doesn't match major */ if (B_TYPE(initial_bootdev) == 6) biosdev = 0x30 + B_UNIT(initial_bootdev); else biosdev = (major << 3) + 0x80 + B_UNIT(initial_bootdev); } #else if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) /* biosdev doesn't match major */ biosdev = 0x80 + B_UNIT(initial_bootdev); /* assume harddisk */ #endif } /* * If we are booting off of a BIOS disk and we didn't succeed in determining * which one we booted off of, just use disk0: as a reasonable default. */ if ((currdev.d_type == devsw[0]->dv_type) && ((currdev.d_kind.biosdisk.unit = bd_bios2unit(biosdev)) == -1)) { printf("Can't work out which disk we are booting from.\n" "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); currdev.d_kind.biosdisk.unit = 0; } env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&currdev), i386_setcurrdev, env_nounset); env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&currdev), env_noset, env_nounset); } COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); static int command_reboot(int argc, char *argv[]) { int i; for (i = 0; devsw[i] != NULL; ++i) if (devsw[i]->dv_cleanup != NULL) (devsw[i]->dv_cleanup)(); printf("Rebooting...\n"); delay(1000000); __exit(0); } /* provide this for panic, as it's not in the startup code */ void exit(int code) { __exit(code); } COMMAND_SET(heap, "heap", "show heap usage", command_heap); static int command_heap(int argc, char *argv[]) { mallocstats(); printf("heap base at %p, top at %p\n", end, sbrk(0)); return(CMD_OK); } /* ISA bus access functions for PnP, derived from */ static int isa_inb(int port) { u_char data; if (__builtin_constant_p(port) && (((port) & 0xffff) < 0x100) && ((port) < 0x10000)) { __asm __volatile("inb %1,%0" : "=a" (data) : "id" ((u_short)(port))); } else { __asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port)); } return(data); } static void isa_outb(int port, int value) { u_char al = value; if (__builtin_constant_p(port) && (((port) & 0xffff) < 0x100) && ((port) < 0x10000)) { __asm __volatile("outb %0,%1" : : "a" (al), "id" ((u_short)(port))); } else { __asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port)); } }