main.c revision 58871
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 58871 2000-03-31 16:03:02Z kato $ 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 4358871Skato#define KARGS_FLAGS_CD 0x1 4458871Skato#define KARGS_FLAGS_PXE 0x2 4558871Skato 4643561Skato/* Arguments passed in from the boot1/boot2 loader */ 4743561Skatostatic struct 4843561Skato{ 4943561Skato u_int32_t howto; 5043561Skato u_int32_t bootdev; 5158871Skato u_int32_t bootflags; 5258871Skato u_int32_t pxeinfo; 5343561Skato u_int32_t res2; 5443561Skato u_int32_t bootinfo; 5543561Skato} *kargs; 5643561Skato 5743561Skatostatic u_int32_t initial_howto; 5843561Skatostatic u_int32_t initial_bootdev; 5943561Skatostatic struct bootinfo *initial_bootinfo; 6043561Skato 6143561Skatostruct arch_switch archsw; /* MI/MD interface boundary */ 6243561Skato 6343561Skatostatic void extract_currdev(void); 6443561Skatostatic int isa_inb(int port); 6543561Skatostatic void isa_outb(int port, int value); 6643561Skato 6743561Skato/* from vers.c */ 6843561Skatoextern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[]; 6943561Skato 7043561Skato/* XXX debugging */ 7143561Skatoextern char end[]; 7243561Skato 7343561Skatovoid 7443561Skatomain(void) 7543561Skato{ 7643561Skato int i; 7743561Skato 7843561Skato /* Pick up arguments */ 7943561Skato kargs = (void *)__args; 8043561Skato initial_howto = kargs->howto; 8143561Skato initial_bootdev = kargs->bootdev; 8258871Skato initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; 8343561Skato 8443561Skato /* 8543561Skato * Initialise the heap as early as possible. Once this is done, malloc() is usable. 8643561Skato */ 8755342Snyan bios_getmem(); 8855342Snyan setheap((void *)end, (void *)bios_basemem); 8958871Skato 9043561Skato /* 9143561Skato * XXX Chicken-and-egg problem; we want to have console output early, but some 9243561Skato * console attributes may depend on reading from eg. the boot device, which we 9343561Skato * can't do yet. 9443561Skato * 9543561Skato * We can use printf() etc. once this is done. 9643561Skato * If the previous boot stage has requested a serial console, prefer that. 9743561Skato */ 9843561Skato if (initial_howto & RB_SERIAL) 9943561Skato setenv("console", "comconsole", 1); 10043561Skato cons_probe(); 10143561Skato 10243561Skato /* 10343561Skato * Initialise the block cache 10443561Skato */ 10543561Skato bcache_init(32, 512); /* 16k cache XXX tune this */ 10643561Skato 10743561Skato /* 10858871Skato * We only want the PXE disk to try to init itself in the below walk through 10958871Skato * devsw if we actually booted off of PXE. 11058871Skato */ 11158871Skato if((kargs->bootinfo == NULL) && 11258871Skato ((kargs->bootflags & KARGS_FLAGS_PXE) != 0)) { 11358871Skato pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); 11458871Skato } 11558871Skato 11658871Skato /* 11743561Skato * March through the device switch probing for things. 11843561Skato */ 11943561Skato for (i = 0; devsw[i] != NULL; i++) 12043561Skato if (devsw[i]->dv_init != NULL) 12143561Skato (devsw[i]->dv_init)(); 12255342Snyan printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 12343561Skato 12443561Skato printf("\n"); 12555342Snyan printf("%s, Revision %s\n", bootprog_name, bootprog_rev); 12643561Skato printf("(%s, %s)\n", bootprog_maker, bootprog_date); 12743561Skato 12843561Skato extract_currdev(); /* set $currdev and $loaddev */ 12943561Skato setenv("LINES", "24", 1); /* optional */ 13043561Skato 13143561Skato archsw.arch_autoload = i386_autoload; 13243561Skato archsw.arch_getdev = i386_getdev; 13343561Skato archsw.arch_copyin = i386_copyin; 13443561Skato archsw.arch_copyout = i386_copyout; 13543561Skato archsw.arch_readin = i386_readin; 13643561Skato archsw.arch_isainb = isa_inb; 13743561Skato archsw.arch_isaoutb = isa_outb; 13843561Skato 13943561Skato interact(); /* doesn't return */ 14043561Skato} 14143561Skato 14243561Skato/* 14343561Skato * Set the 'current device' by (if possible) recovering the boot device as 14443561Skato * supplied by the initial bootstrap. 14543561Skato * 14643561Skato * XXX should be extended for netbooting. 14743561Skato */ 14843561Skatostatic void 14943561Skatoextract_currdev(void) 15043561Skato{ 15143561Skato struct i386_devdesc currdev; 15243561Skato int major, biosdev; 15343561Skato 15458871Skato /* Assume we are booting from a BIOS disk by default */ 15558871Skato currdev.d_dev = &biosdisk; 15643561Skato currdev.d_type = currdev.d_dev->dv_type; 15743561Skato 15858871Skato /* new-style boot loaders such as pxeldr and cdldr */ 15958871Skato if (kargs->bootinfo == NULL) { 16058871Skato if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { 16158871Skato /* we are booting from a CD with cdldr */ 16258871Skato currdev.d_kind.biosdisk.slice = -1; 16358871Skato currdev.d_kind.biosdisk.partition = 0; 16458871Skato biosdev = initial_bootdev; 16558871Skato } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { 16658871Skato /* we are booting from pxeldr */ 16758871Skato currdev.d_dev = &pxedisk; 16858871Skato currdev.d_type = currdev.d_dev->dv_type; 16958871Skato currdev.d_kind.netif.unit = 0; 17058871Skato } else { 17158871Skato /* we don't know what our boot device is */ 17258871Skato currdev.d_kind.biosdisk.slice = -1; 17358871Skato currdev.d_kind.biosdisk.partition = 0; 17458871Skato biosdev = -1; 17558871Skato } 17658871Skato } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 17743561Skato /* The passed-in boot device is bad */ 17843561Skato currdev.d_kind.biosdisk.slice = -1; 17943561Skato currdev.d_kind.biosdisk.partition = 0; 18043561Skato biosdev = -1; 18143561Skato } else { 18258871Skato currdev.d_kind.biosdisk.slice = (B_ADAPTOR(initial_bootdev) << 4) + 18358871Skato B_CONTROLLER(initial_bootdev) - 1; 18443561Skato currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); 18543561Skato biosdev = initial_bootinfo->bi_bios_dev; 18643561Skato major = B_TYPE(initial_bootdev); 18743561Skato 18843561Skato /* 18943561Skato * If we are booted by an old bootstrap, we have to guess at the BIOS 19043561Skato * unit number. We will loose if there is more than one disk type 19143561Skato * and we are not booting from the lowest-numbered disk type 19243561Skato * (ie. SCSI when IDE also exists). 19343561Skato */ 19444463Skato#ifdef PC98 19553218Snyan if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) { /* biosdev doesn't match major */ 19644463Skato if (B_TYPE(initial_bootdev) == 6) 19744463Skato biosdev = 0x30 + B_UNIT(initial_bootdev); 19844463Skato else 19944463Skato biosdev = (major << 3) + 0x80 + B_UNIT(initial_bootdev); 20053218Snyan } 20143561Skato#else 20243561Skato if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) /* biosdev doesn't match major */ 20343561Skato biosdev = 0x80 + B_UNIT(initial_bootdev); /* assume harddisk */ 20443561Skato#endif 20543561Skato } 20643561Skato 20758871Skato /* 20858871Skato * If we are booting off of a BIOS disk and we didn't succeed in determining 20958871Skato * which one we booted off of, just use disk0: as a reasonable default. 21058871Skato */ 21158871Skato if ((currdev.d_type == devsw[0]->dv_type) && 21258871Skato ((currdev.d_kind.biosdisk.unit = bd_bios2unit(biosdev)) == -1)) { 21343561Skato printf("Can't work out which disk we are booting from.\n" 21443561Skato "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); 21543561Skato currdev.d_kind.biosdisk.unit = 0; 21643561Skato } 21743561Skato env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&currdev), i386_setcurrdev, env_nounset); 21843561Skato env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&currdev), env_noset, env_nounset); 21943561Skato} 22043561Skato 22143561SkatoCOMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 22243561Skato 22343561Skatostatic int 22443561Skatocommand_reboot(int argc, char *argv[]) 22543561Skato{ 22643561Skato 22743561Skato printf("Rebooting...\n"); 22843561Skato delay(1000000); 22943561Skato __exit(0); 23043561Skato} 23143561Skato 23243561Skato/* provide this for panic, as it's not in the startup code */ 23343561Skatovoid 23443561Skatoexit(int code) 23543561Skato{ 23643561Skato __exit(code); 23743561Skato} 23843561Skato 23943561SkatoCOMMAND_SET(heap, "heap", "show heap usage", command_heap); 24043561Skato 24143561Skatostatic int 24243561Skatocommand_heap(int argc, char *argv[]) 24343561Skato{ 24443561Skato mallocstats(); 24543561Skato printf("heap base at %p, top at %p\n", end, sbrk(0)); 24643561Skato return(CMD_OK); 24743561Skato} 24843561Skato 24943561Skato/* ISA bus access functions for PnP, derived from <machine/cpufunc.h> */ 25043561Skatostatic int 25143561Skatoisa_inb(int port) 25243561Skato{ 25343561Skato u_char data; 25443561Skato 25543561Skato if (__builtin_constant_p(port) && 25643561Skato (((port) & 0xffff) < 0x100) && 25743561Skato ((port) < 0x10000)) { 25843561Skato __asm __volatile("inb %1,%0" : "=a" (data) : "id" ((u_short)(port))); 25943561Skato } else { 26043561Skato __asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port)); 26143561Skato } 26243561Skato return(data); 26343561Skato} 26443561Skato 26543561Skatostatic void 26643561Skatoisa_outb(int port, int value) 26743561Skato{ 26843561Skato u_char al = value; 26943561Skato 27043561Skato if (__builtin_constant_p(port) && 27143561Skato (((port) & 0xffff) < 0x100) && 27243561Skato ((port) < 0x10000)) { 27343561Skato __asm __volatile("outb %0,%1" : : "a" (al), "id" ((u_short)(port))); 27443561Skato } else { 27543561Skato __asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port)); 27643561Skato } 27743561Skato} 27843561Skato 279