main.c revision 126970
143561Skato/*- 243561Skato * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 343561Skato * All rights reserved. 443561Skato * 543561Skato * Redistribution and use in source and binary forms, with or without 643561Skato * modification, are permitted provided that the following conditions 743561Skato * are met: 843561Skato * 1. Redistributions of source code must retain the above copyright 943561Skato * notice, this list of conditions and the following disclaimer. 1043561Skato * 2. Redistributions in binary form must reproduce the above copyright 1143561Skato * notice, this list of conditions and the following disclaimer in the 1243561Skato * documentation and/or other materials provided with the distribution. 1343561Skato * 1443561Skato * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1543561Skato * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1643561Skato * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1743561Skato * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1843561Skato * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1943561Skato * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2043561Skato * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2143561Skato * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2243561Skato * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2343561Skato * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2443561Skato * SUCH DAMAGE. 2543561Skato */ 2643561Skato 27119880Sobrien#include <sys/cdefs.h> 28119880Sobrien__FBSDID("$FreeBSD: head/sys/boot/pc98/loader/main.c 126970 2004-03-14 09:43:15Z nyan $"); 29119880Sobrien 3043561Skato/* 3143561Skato * MD bootstrap main() and assorted miscellaneous 3243561Skato * commands. 3343561Skato */ 3443561Skato 3543561Skato#include <stand.h> 3643561Skato#include <string.h> 3743561Skato#include <machine/bootinfo.h> 3843561Skato#include <sys/reboot.h> 3943561Skato 4043561Skato#include "bootstrap.h" 4145241Skato#include "libi386/libi386.h" 4243561Skato#include "btxv86.h" 4343561Skato 4458871Skato#define KARGS_FLAGS_CD 0x1 4558871Skato#define KARGS_FLAGS_PXE 0x2 4658871Skato 4743561Skato/* Arguments passed in from the boot1/boot2 loader */ 4843561Skatostatic struct 4943561Skato{ 5043561Skato u_int32_t howto; 5143561Skato u_int32_t bootdev; 5258871Skato u_int32_t bootflags; 5358871Skato u_int32_t pxeinfo; 5443561Skato u_int32_t res2; 5543561Skato u_int32_t bootinfo; 5643561Skato} *kargs; 5743561Skato 5843561Skatostatic u_int32_t initial_howto; 5943561Skatostatic u_int32_t initial_bootdev; 6043561Skatostatic struct bootinfo *initial_bootinfo; 6143561Skato 6243561Skatostruct arch_switch archsw; /* MI/MD interface boundary */ 6343561Skato 6443561Skatostatic void extract_currdev(void); 6543561Skatostatic int isa_inb(int port); 6643561Skatostatic void isa_outb(int port, int value); 6768358Snyanvoid exit(int code); 6843561Skato 6943561Skato/* from vers.c */ 7043561Skatoextern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[]; 7143561Skato 7243561Skato/* XXX debugging */ 7343561Skatoextern char end[]; 7443561Skato 7568358Snyanint 7643561Skatomain(void) 7743561Skato{ 7843561Skato int i; 7943561Skato 8043561Skato /* Pick up arguments */ 8143561Skato kargs = (void *)__args; 8243561Skato initial_howto = kargs->howto; 8343561Skato initial_bootdev = kargs->bootdev; 8458871Skato initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; 8543561Skato 8643561Skato /* 8743561Skato * Initialise the heap as early as possible. Once this is done, malloc() is usable. 8843561Skato */ 8955342Snyan bios_getmem(); 9059167Skato 9155342Snyan setheap((void *)end, (void *)bios_basemem); 9258871Skato 9343561Skato /* 9443561Skato * XXX Chicken-and-egg problem; we want to have console output early, but some 9543561Skato * console attributes may depend on reading from eg. the boot device, which we 9643561Skato * can't do yet. 9743561Skato * 9843561Skato * We can use printf() etc. once this is done. 9943561Skato * If the previous boot stage has requested a serial console, prefer that. 10043561Skato */ 10143561Skato if (initial_howto & RB_SERIAL) 10243561Skato setenv("console", "comconsole", 1); 10366246Skato if (initial_howto & RB_MUTE) 10466246Skato setenv("console", "nullconsole", 1); 10543561Skato cons_probe(); 10643561Skato 10743561Skato /* 10843561Skato * Initialise the block cache 10943561Skato */ 11043561Skato bcache_init(32, 512); /* 16k cache XXX tune this */ 11143561Skato 11243561Skato /* 11386131Snyan * Special handling for PXE and CD booting. 11458871Skato */ 115126970Snyan if (kargs->bootinfo == 0) { 11686131Snyan /* 11786131Snyan * We only want the PXE disk to try to init itself in the below 11886131Snyan * walk through devsw if we actually booted off of PXE. 11986131Snyan */ 12086131Snyan if (kargs->bootflags & KARGS_FLAGS_PXE) 12186131Snyan pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); 12286131Snyan else if (kargs->bootflags & KARGS_FLAGS_CD) 12386131Snyan bc_add(initial_bootdev); 12458871Skato } 12558871Skato 12658871Skato /* 12743561Skato * March through the device switch probing for things. 12843561Skato */ 12943561Skato for (i = 0; devsw[i] != NULL; i++) 13043561Skato if (devsw[i]->dv_init != NULL) 13143561Skato (devsw[i]->dv_init)(); 13255342Snyan printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 13343561Skato 13483532Snyan#ifndef PC98 13583532Snyan /* detect ACPI for future reference */ 13683532Snyan biosacpi_detect(); 13783532Snyan#endif 13883532Snyan 13943561Skato printf("\n"); 14055342Snyan printf("%s, Revision %s\n", bootprog_name, bootprog_rev); 14143561Skato printf("(%s, %s)\n", bootprog_maker, bootprog_date); 14243561Skato 14343561Skato extract_currdev(); /* set $currdev and $loaddev */ 14443561Skato setenv("LINES", "24", 1); /* optional */ 14543561Skato 14643561Skato archsw.arch_autoload = i386_autoload; 14743561Skato archsw.arch_getdev = i386_getdev; 14843561Skato archsw.arch_copyin = i386_copyin; 14943561Skato archsw.arch_copyout = i386_copyout; 15043561Skato archsw.arch_readin = i386_readin; 15143561Skato archsw.arch_isainb = isa_inb; 15243561Skato archsw.arch_isaoutb = isa_outb; 15343561Skato 15443561Skato interact(); /* doesn't return */ 15568358Snyan 15668358Snyan /* if we ever get here, it is an error */ 15768358Snyan return (1); 15843561Skato} 15943561Skato 16043561Skato/* 16143561Skato * Set the 'current device' by (if possible) recovering the boot device as 16243561Skato * supplied by the initial bootstrap. 16343561Skato * 16443561Skato * XXX should be extended for netbooting. 16543561Skato */ 16643561Skatostatic void 16743561Skatoextract_currdev(void) 16843561Skato{ 16968358Snyan struct i386_devdesc new_currdev; 17086131Snyan int major, biosdev = -1; 17143561Skato 17258871Skato /* Assume we are booting from a BIOS disk by default */ 17368358Snyan new_currdev.d_dev = &biosdisk; 17443561Skato 17558871Skato /* new-style boot loaders such as pxeldr and cdldr */ 176126970Snyan if (kargs->bootinfo == 0) { 17758871Skato if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { 17886131Snyan /* we are booting from a CD with cdboot */ 17986131Snyan new_currdev.d_dev = &bioscd; 18086131Snyan new_currdev.d_kind.bioscd.unit = bc_bios2unit(initial_bootdev); 18158871Skato } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { 18258871Skato /* we are booting from pxeldr */ 18368358Snyan new_currdev.d_dev = &pxedisk; 18468358Snyan new_currdev.d_kind.netif.unit = 0; 18558871Skato } else { 18658871Skato /* we don't know what our boot device is */ 18768358Snyan new_currdev.d_kind.biosdisk.slice = -1; 18868358Snyan new_currdev.d_kind.biosdisk.partition = 0; 18958871Skato biosdev = -1; 19058871Skato } 19158871Skato } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 19243561Skato /* The passed-in boot device is bad */ 19368358Snyan new_currdev.d_kind.biosdisk.slice = -1; 19468358Snyan new_currdev.d_kind.biosdisk.partition = 0; 19543561Skato biosdev = -1; 19643561Skato } else { 19768358Snyan new_currdev.d_kind.biosdisk.slice = (B_ADAPTOR(initial_bootdev) << 4) + 19868358Snyan B_CONTROLLER(initial_bootdev) - 1; 19968358Snyan new_currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); 20043561Skato biosdev = initial_bootinfo->bi_bios_dev; 20143561Skato major = B_TYPE(initial_bootdev); 20243561Skato 20343561Skato /* 20443561Skato * If we are booted by an old bootstrap, we have to guess at the BIOS 20543561Skato * unit number. We will loose if there is more than one disk type 20643561Skato * and we are not booting from the lowest-numbered disk type 20743561Skato * (ie. SCSI when IDE also exists). 20843561Skato */ 20944463Skato#ifdef PC98 21053218Snyan if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) { /* biosdev doesn't match major */ 21144463Skato if (B_TYPE(initial_bootdev) == 6) 21244463Skato biosdev = 0x30 + B_UNIT(initial_bootdev); 21344463Skato else 21444463Skato biosdev = (major << 3) + 0x80 + B_UNIT(initial_bootdev); 21553218Snyan } 21643561Skato#else 21743561Skato if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) /* biosdev doesn't match major */ 21843561Skato biosdev = 0x80 + B_UNIT(initial_bootdev); /* assume harddisk */ 21943561Skato#endif 22043561Skato } 22186131Snyan new_currdev.d_type = new_currdev.d_dev->dv_type; 22243561Skato 22358871Skato /* 22458871Skato * If we are booting off of a BIOS disk and we didn't succeed in determining 22558871Skato * which one we booted off of, just use disk0: as a reasonable default. 22658871Skato */ 22786131Snyan if ((new_currdev.d_type == biosdisk.dv_type) && 22868358Snyan ((new_currdev.d_kind.biosdisk.unit = bd_bios2unit(biosdev)) == -1)) { 22943561Skato printf("Can't work out which disk we are booting from.\n" 23043561Skato "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); 23168358Snyan new_currdev.d_kind.biosdisk.unit = 0; 23243561Skato } 23368358Snyan env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev), 23468358Snyan i386_setcurrdev, env_nounset); 23568358Snyan env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset, 23668358Snyan env_nounset); 23743561Skato} 23843561Skato 23943561SkatoCOMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 24043561Skato 24143561Skatostatic int 24243561Skatocommand_reboot(int argc, char *argv[]) 24343561Skato{ 24459535Snyan int i; 24543561Skato 24659535Snyan for (i = 0; devsw[i] != NULL; ++i) 24759535Snyan if (devsw[i]->dv_cleanup != NULL) 24859535Snyan (devsw[i]->dv_cleanup)(); 24959535Snyan 25043561Skato printf("Rebooting...\n"); 25143561Skato delay(1000000); 25243561Skato __exit(0); 25343561Skato} 25443561Skato 25543561Skato/* provide this for panic, as it's not in the startup code */ 25643561Skatovoid 25743561Skatoexit(int code) 25843561Skato{ 25943561Skato __exit(code); 26043561Skato} 26143561Skato 26243561SkatoCOMMAND_SET(heap, "heap", "show heap usage", command_heap); 26343561Skato 26443561Skatostatic int 26543561Skatocommand_heap(int argc, char *argv[]) 26643561Skato{ 26743561Skato mallocstats(); 26843561Skato printf("heap base at %p, top at %p\n", end, sbrk(0)); 26943561Skato return(CMD_OK); 27043561Skato} 27143561Skato 27243561Skato/* ISA bus access functions for PnP, derived from <machine/cpufunc.h> */ 27343561Skatostatic int 27443561Skatoisa_inb(int port) 27543561Skato{ 27643561Skato u_char data; 27743561Skato 27843561Skato if (__builtin_constant_p(port) && 27943561Skato (((port) & 0xffff) < 0x100) && 28043561Skato ((port) < 0x10000)) { 28143561Skato __asm __volatile("inb %1,%0" : "=a" (data) : "id" ((u_short)(port))); 28243561Skato } else { 28343561Skato __asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port)); 28443561Skato } 28543561Skato return(data); 28643561Skato} 28743561Skato 28843561Skatostatic void 28943561Skatoisa_outb(int port, int value) 29043561Skato{ 29143561Skato u_char al = value; 29243561Skato 29343561Skato if (__builtin_constant_p(port) && 29443561Skato (((port) & 0xffff) < 0x100) && 29543561Skato ((port) < 0x10000)) { 29643561Skato __asm __volatile("outb %0,%1" : : "a" (al), "id" ((u_short)(port))); 29743561Skato } else { 29843561Skato __asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port)); 29943561Skato } 30043561Skato} 30143561Skato 302