main.c revision 66246
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 66246 2000-09-22 12:51:22Z 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 7359167Skato/* XXX - I dont know why we have to do this, but it helps. */ 7459167Skato#if defined(LOADER_NFS_SUPPORT) || defined(LOADER_TFTP_SUPPORT) 7559167Skatochar Heap[200*1024]; 7659167Skato#endif 7759167Skato 7843561Skatovoid 7943561Skatomain(void) 8043561Skato{ 8143561Skato int i; 8243561Skato 8343561Skato /* Pick up arguments */ 8443561Skato kargs = (void *)__args; 8543561Skato initial_howto = kargs->howto; 8643561Skato initial_bootdev = kargs->bootdev; 8758871Skato initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; 8843561Skato 8943561Skato /* 9043561Skato * Initialise the heap as early as possible. Once this is done, malloc() is usable. 9143561Skato */ 9255342Snyan bios_getmem(); 9359167Skato 9459167Skato /* XXX - I dont know why we have to do this, but it helps PXE. */ 9559167Skato#if defined(LOADER_NFS_SUPPORT) || defined(LOADER_TFTP_SUPPORT) 9659167Skato setheap(Heap, Heap+sizeof(Heap)); 9759167Skato#else 9855342Snyan setheap((void *)end, (void *)bios_basemem); 9959167Skato#endif 10058871Skato 10143561Skato /* 10243561Skato * XXX Chicken-and-egg problem; we want to have console output early, but some 10343561Skato * console attributes may depend on reading from eg. the boot device, which we 10443561Skato * can't do yet. 10543561Skato * 10643561Skato * We can use printf() etc. once this is done. 10743561Skato * If the previous boot stage has requested a serial console, prefer that. 10843561Skato */ 10943561Skato if (initial_howto & RB_SERIAL) 11043561Skato setenv("console", "comconsole", 1); 11166246Skato if (initial_howto & RB_MUTE) 11266246Skato setenv("console", "nullconsole", 1); 11343561Skato cons_probe(); 11443561Skato 11543561Skato /* 11643561Skato * Initialise the block cache 11743561Skato */ 11843561Skato bcache_init(32, 512); /* 16k cache XXX tune this */ 11943561Skato 12043561Skato /* 12158871Skato * We only want the PXE disk to try to init itself in the below walk through 12258871Skato * devsw if we actually booted off of PXE. 12358871Skato */ 12458871Skato if((kargs->bootinfo == NULL) && 12558871Skato ((kargs->bootflags & KARGS_FLAGS_PXE) != 0)) { 12658871Skato pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); 12758871Skato } 12858871Skato 12958871Skato /* 13043561Skato * March through the device switch probing for things. 13143561Skato */ 13243561Skato for (i = 0; devsw[i] != NULL; i++) 13343561Skato if (devsw[i]->dv_init != NULL) 13443561Skato (devsw[i]->dv_init)(); 13555342Snyan printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 13643561Skato 13743561Skato printf("\n"); 13855342Snyan printf("%s, Revision %s\n", bootprog_name, bootprog_rev); 13943561Skato printf("(%s, %s)\n", bootprog_maker, bootprog_date); 14043561Skato 14143561Skato extract_currdev(); /* set $currdev and $loaddev */ 14243561Skato setenv("LINES", "24", 1); /* optional */ 14343561Skato 14443561Skato archsw.arch_autoload = i386_autoload; 14543561Skato archsw.arch_getdev = i386_getdev; 14643561Skato archsw.arch_copyin = i386_copyin; 14743561Skato archsw.arch_copyout = i386_copyout; 14843561Skato archsw.arch_readin = i386_readin; 14943561Skato archsw.arch_isainb = isa_inb; 15043561Skato archsw.arch_isaoutb = isa_outb; 15143561Skato 15243561Skato interact(); /* doesn't return */ 15343561Skato} 15443561Skato 15543561Skato/* 15643561Skato * Set the 'current device' by (if possible) recovering the boot device as 15743561Skato * supplied by the initial bootstrap. 15843561Skato * 15943561Skato * XXX should be extended for netbooting. 16043561Skato */ 16143561Skatostatic void 16243561Skatoextract_currdev(void) 16343561Skato{ 16443561Skato struct i386_devdesc currdev; 16543561Skato int major, biosdev; 16643561Skato 16758871Skato /* Assume we are booting from a BIOS disk by default */ 16858871Skato currdev.d_dev = &biosdisk; 16943561Skato currdev.d_type = currdev.d_dev->dv_type; 17043561Skato 17158871Skato /* new-style boot loaders such as pxeldr and cdldr */ 17258871Skato if (kargs->bootinfo == NULL) { 17358871Skato if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { 17458871Skato /* we are booting from a CD with cdldr */ 17558871Skato currdev.d_kind.biosdisk.slice = -1; 17658871Skato currdev.d_kind.biosdisk.partition = 0; 17758871Skato biosdev = initial_bootdev; 17858871Skato } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { 17958871Skato /* we are booting from pxeldr */ 18058871Skato currdev.d_dev = &pxedisk; 18158871Skato currdev.d_type = currdev.d_dev->dv_type; 18258871Skato currdev.d_kind.netif.unit = 0; 18358871Skato } else { 18458871Skato /* we don't know what our boot device is */ 18558871Skato currdev.d_kind.biosdisk.slice = -1; 18658871Skato currdev.d_kind.biosdisk.partition = 0; 18758871Skato biosdev = -1; 18858871Skato } 18958871Skato } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 19043561Skato /* The passed-in boot device is bad */ 19143561Skato currdev.d_kind.biosdisk.slice = -1; 19243561Skato currdev.d_kind.biosdisk.partition = 0; 19343561Skato biosdev = -1; 19443561Skato } else { 19558871Skato currdev.d_kind.biosdisk.slice = (B_ADAPTOR(initial_bootdev) << 4) + 19658871Skato B_CONTROLLER(initial_bootdev) - 1; 19743561Skato currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); 19843561Skato biosdev = initial_bootinfo->bi_bios_dev; 19943561Skato major = B_TYPE(initial_bootdev); 20043561Skato 20143561Skato /* 20243561Skato * If we are booted by an old bootstrap, we have to guess at the BIOS 20343561Skato * unit number. We will loose if there is more than one disk type 20443561Skato * and we are not booting from the lowest-numbered disk type 20543561Skato * (ie. SCSI when IDE also exists). 20643561Skato */ 20744463Skato#ifdef PC98 20853218Snyan if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) { /* biosdev doesn't match major */ 20944463Skato if (B_TYPE(initial_bootdev) == 6) 21044463Skato biosdev = 0x30 + B_UNIT(initial_bootdev); 21144463Skato else 21244463Skato biosdev = (major << 3) + 0x80 + B_UNIT(initial_bootdev); 21353218Snyan } 21443561Skato#else 21543561Skato if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) /* biosdev doesn't match major */ 21643561Skato biosdev = 0x80 + B_UNIT(initial_bootdev); /* assume harddisk */ 21743561Skato#endif 21843561Skato } 21943561Skato 22058871Skato /* 22158871Skato * If we are booting off of a BIOS disk and we didn't succeed in determining 22258871Skato * which one we booted off of, just use disk0: as a reasonable default. 22358871Skato */ 22458871Skato if ((currdev.d_type == devsw[0]->dv_type) && 22558871Skato ((currdev.d_kind.biosdisk.unit = bd_bios2unit(biosdev)) == -1)) { 22643561Skato printf("Can't work out which disk we are booting from.\n" 22743561Skato "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); 22843561Skato currdev.d_kind.biosdisk.unit = 0; 22943561Skato } 23043561Skato env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&currdev), i386_setcurrdev, env_nounset); 23143561Skato env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&currdev), env_noset, env_nounset); 23243561Skato} 23343561Skato 23443561SkatoCOMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 23543561Skato 23643561Skatostatic int 23743561Skatocommand_reboot(int argc, char *argv[]) 23843561Skato{ 23959535Snyan int i; 24043561Skato 24159535Snyan for (i = 0; devsw[i] != NULL; ++i) 24259535Snyan if (devsw[i]->dv_cleanup != NULL) 24359535Snyan (devsw[i]->dv_cleanup)(); 24459535Snyan 24543561Skato printf("Rebooting...\n"); 24643561Skato delay(1000000); 24743561Skato __exit(0); 24843561Skato} 24943561Skato 25043561Skato/* provide this for panic, as it's not in the startup code */ 25143561Skatovoid 25243561Skatoexit(int code) 25343561Skato{ 25443561Skato __exit(code); 25543561Skato} 25643561Skato 25743561SkatoCOMMAND_SET(heap, "heap", "show heap usage", command_heap); 25843561Skato 25943561Skatostatic int 26043561Skatocommand_heap(int argc, char *argv[]) 26143561Skato{ 26243561Skato mallocstats(); 26343561Skato printf("heap base at %p, top at %p\n", end, sbrk(0)); 26443561Skato return(CMD_OK); 26543561Skato} 26643561Skato 26743561Skato/* ISA bus access functions for PnP, derived from <machine/cpufunc.h> */ 26843561Skatostatic int 26943561Skatoisa_inb(int port) 27043561Skato{ 27143561Skato u_char data; 27243561Skato 27343561Skato if (__builtin_constant_p(port) && 27443561Skato (((port) & 0xffff) < 0x100) && 27543561Skato ((port) < 0x10000)) { 27643561Skato __asm __volatile("inb %1,%0" : "=a" (data) : "id" ((u_short)(port))); 27743561Skato } else { 27843561Skato __asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port)); 27943561Skato } 28043561Skato return(data); 28143561Skato} 28243561Skato 28343561Skatostatic void 28443561Skatoisa_outb(int port, int value) 28543561Skato{ 28643561Skato u_char al = value; 28743561Skato 28843561Skato if (__builtin_constant_p(port) && 28943561Skato (((port) & 0xffff) < 0x100) && 29043561Skato ((port) < 0x10000)) { 29143561Skato __asm __volatile("outb %0,%1" : : "a" (al), "id" ((u_short)(port))); 29243561Skato } else { 29343561Skato __asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port)); 29443561Skato } 29543561Skato} 29643561Skato 297