main.c revision 55342
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 * 2650477Speter * $FreeBSD: head/sys/boot/pc98/loader/main.c 55342 2000-01-03 15:43:52Z nyan $ 2743561Skato */ 2843561Skato 2943561Skato/* 3043561Skato * MD bootstrap main() and assorted miscellaneous 3143561Skato * commands. 3243561Skato */ 3343561Skato 3443561Skato#include <stand.h> 3543561Skato#include <string.h> 3643561Skato#include <machine/bootinfo.h> 3743561Skato#include <sys/reboot.h> 3843561Skato 3943561Skato#include "bootstrap.h" 4045241Skato#include "libi386/libi386.h" 4143561Skato#include "btxv86.h" 4243561Skato 4343561Skato/* Arguments passed in from the boot1/boot2 loader */ 4443561Skatostatic struct 4543561Skato{ 4643561Skato u_int32_t howto; 4743561Skato u_int32_t bootdev; 4843561Skato u_int32_t res0; 4943561Skato u_int32_t res1; 5043561Skato u_int32_t res2; 5143561Skato u_int32_t bootinfo; 5243561Skato} *kargs; 5343561Skato 5443561Skatostatic u_int32_t initial_howto; 5543561Skatostatic u_int32_t initial_bootdev; 5643561Skatostatic struct bootinfo *initial_bootinfo; 5743561Skato 5843561Skatostruct arch_switch archsw; /* MI/MD interface boundary */ 5943561Skato 6043561Skatostatic void extract_currdev(void); 6143561Skatostatic int isa_inb(int port); 6243561Skatostatic void isa_outb(int port, int value); 6343561Skato 6443561Skato/* from vers.c */ 6543561Skatoextern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[]; 6643561Skato 6743561Skato/* XXX debugging */ 6843561Skatoextern char end[]; 6943561Skato 7043561Skatovoid 7143561Skatomain(void) 7243561Skato{ 7343561Skato int i; 7443561Skato 7543561Skato /* Pick up arguments */ 7643561Skato kargs = (void *)__args; 7743561Skato initial_howto = kargs->howto; 7843561Skato initial_bootdev = kargs->bootdev; 7943561Skato initial_bootinfo = (struct bootinfo *)PTOV(kargs->bootinfo); 8043561Skato 8143561Skato /* 8243561Skato * Initialise the heap as early as possible. Once this is done, malloc() is usable. 8343561Skato */ 8455342Snyan bios_getmem(); 8555342Snyan setheap((void *)end, (void *)bios_basemem); 8643561Skato 8743561Skato /* 8843561Skato * XXX Chicken-and-egg problem; we want to have console output early, but some 8943561Skato * console attributes may depend on reading from eg. the boot device, which we 9043561Skato * can't do yet. 9143561Skato * 9243561Skato * We can use printf() etc. once this is done. 9343561Skato * If the previous boot stage has requested a serial console, prefer that. 9443561Skato */ 9543561Skato if (initial_howto & RB_SERIAL) 9643561Skato setenv("console", "comconsole", 1); 9743561Skato cons_probe(); 9843561Skato 9943561Skato /* 10043561Skato * Initialise the block cache 10143561Skato */ 10243561Skato bcache_init(32, 512); /* 16k cache XXX tune this */ 10343561Skato 10443561Skato /* 10543561Skato * March through the device switch probing for things. 10643561Skato */ 10743561Skato for (i = 0; devsw[i] != NULL; i++) 10843561Skato if (devsw[i]->dv_init != NULL) 10943561Skato (devsw[i]->dv_init)(); 11055342Snyan printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 11143561Skato 11243561Skato printf("\n"); 11355342Snyan printf("%s, Revision %s\n", bootprog_name, bootprog_rev); 11443561Skato printf("(%s, %s)\n", bootprog_maker, bootprog_date); 11543561Skato 11643561Skato extract_currdev(); /* set $currdev and $loaddev */ 11743561Skato setenv("LINES", "24", 1); /* optional */ 11843561Skato 11943561Skato archsw.arch_autoload = i386_autoload; 12043561Skato archsw.arch_getdev = i386_getdev; 12143561Skato archsw.arch_copyin = i386_copyin; 12243561Skato archsw.arch_copyout = i386_copyout; 12343561Skato archsw.arch_readin = i386_readin; 12443561Skato archsw.arch_isainb = isa_inb; 12543561Skato archsw.arch_isaoutb = isa_outb; 12643561Skato 12743561Skato interact(); /* doesn't return */ 12843561Skato} 12943561Skato 13043561Skato/* 13143561Skato * Set the 'current device' by (if possible) recovering the boot device as 13243561Skato * supplied by the initial bootstrap. 13343561Skato * 13443561Skato * XXX should be extended for netbooting. 13543561Skato */ 13643561Skatostatic void 13743561Skatoextract_currdev(void) 13843561Skato{ 13943561Skato struct i386_devdesc currdev; 14043561Skato int major, biosdev; 14143561Skato 14243561Skato /* We're booting from a BIOS disk, try to spiff this */ 14343561Skato currdev.d_dev = devsw[0]; /* XXX presumes that biosdisk is first in devsw */ 14443561Skato currdev.d_type = currdev.d_dev->dv_type; 14543561Skato 14643561Skato if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 14743561Skato /* The passed-in boot device is bad */ 14843561Skato currdev.d_kind.biosdisk.slice = -1; 14943561Skato currdev.d_kind.biosdisk.partition = 0; 15043561Skato biosdev = -1; 15143561Skato } else { 15243561Skato currdev.d_kind.biosdisk.slice = (B_ADAPTOR(initial_bootdev) << 4) + B_CONTROLLER(initial_bootdev) - 1; 15343561Skato currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); 15443561Skato biosdev = initial_bootinfo->bi_bios_dev; 15543561Skato major = B_TYPE(initial_bootdev); 15643561Skato 15743561Skato /* 15843561Skato * If we are booted by an old bootstrap, we have to guess at the BIOS 15943561Skato * unit number. We will loose if there is more than one disk type 16043561Skato * and we are not booting from the lowest-numbered disk type 16143561Skato * (ie. SCSI when IDE also exists). 16243561Skato */ 16344463Skato#ifdef PC98 16453218Snyan if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) { /* biosdev doesn't match major */ 16544463Skato if (B_TYPE(initial_bootdev) == 6) 16644463Skato biosdev = 0x30 + B_UNIT(initial_bootdev); 16744463Skato else 16844463Skato biosdev = (major << 3) + 0x80 + B_UNIT(initial_bootdev); 16953218Snyan } 17043561Skato#else 17143561Skato if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) /* biosdev doesn't match major */ 17243561Skato biosdev = 0x80 + B_UNIT(initial_bootdev); /* assume harddisk */ 17343561Skato#endif 17443561Skato } 17543561Skato 17643561Skato if ((currdev.d_kind.biosdisk.unit = bd_bios2unit(biosdev)) == -1) { 17743561Skato printf("Can't work out which disk we are booting from.\n" 17843561Skato "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); 17943561Skato currdev.d_kind.biosdisk.unit = 0; 18043561Skato } 18143561Skato env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&currdev), i386_setcurrdev, env_nounset); 18243561Skato env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&currdev), env_noset, env_nounset); 18343561Skato} 18443561Skato 18543561SkatoCOMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 18643561Skato 18743561Skatostatic int 18843561Skatocommand_reboot(int argc, char *argv[]) 18943561Skato{ 19043561Skato 19143561Skato printf("Rebooting...\n"); 19243561Skato delay(1000000); 19343561Skato __exit(0); 19443561Skato} 19543561Skato 19643561Skato/* provide this for panic, as it's not in the startup code */ 19743561Skatovoid 19843561Skatoexit(int code) 19943561Skato{ 20043561Skato __exit(code); 20143561Skato} 20243561Skato 20343561SkatoCOMMAND_SET(heap, "heap", "show heap usage", command_heap); 20443561Skato 20543561Skatostatic int 20643561Skatocommand_heap(int argc, char *argv[]) 20743561Skato{ 20843561Skato mallocstats(); 20943561Skato printf("heap base at %p, top at %p\n", end, sbrk(0)); 21043561Skato return(CMD_OK); 21143561Skato} 21243561Skato 21343561Skato/* ISA bus access functions for PnP, derived from <machine/cpufunc.h> */ 21443561Skatostatic int 21543561Skatoisa_inb(int port) 21643561Skato{ 21743561Skato u_char data; 21843561Skato 21943561Skato if (__builtin_constant_p(port) && 22043561Skato (((port) & 0xffff) < 0x100) && 22143561Skato ((port) < 0x10000)) { 22243561Skato __asm __volatile("inb %1,%0" : "=a" (data) : "id" ((u_short)(port))); 22343561Skato } else { 22443561Skato __asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port)); 22543561Skato } 22643561Skato return(data); 22743561Skato} 22843561Skato 22943561Skatostatic void 23043561Skatoisa_outb(int port, int value) 23143561Skato{ 23243561Skato u_char al = value; 23343561Skato 23443561Skato if (__builtin_constant_p(port) && 23543561Skato (((port) & 0xffff) < 0x100) && 23643561Skato ((port) < 0x10000)) { 23743561Skato __asm __volatile("outb %0,%1" : : "a" (al), "id" ((u_short)(port))); 23843561Skato } else { 23943561Skato __asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port)); 24043561Skato } 24143561Skato} 24243561Skato 243