main.c revision 330311
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: stable/11/stand/pc98/loader/main.c 330311 2018-03-03 06:37:53Z kevans $"); 29119880Sobrien 3043561Skato/* 3143561Skato * MD bootstrap main() and assorted miscellaneous 3243561Skato * commands. 3343561Skato */ 3443561Skato 3543561Skato#include <stand.h> 36235264Savg#include <stddef.h> 3743561Skato#include <string.h> 3843561Skato#include <machine/bootinfo.h> 39240854Snyan#include <machine/cpufunc.h> 40220311Smarcel#include <sys/param.h> 4143561Skato#include <sys/reboot.h> 4243561Skato 4343561Skato#include "bootstrap.h" 44235264Savg#include "common/bootargs.h" 4545241Skato#include "libi386/libi386.h" 46201339Snyan#include "libpc98/libpc98.h" 4743561Skato#include "btxv86.h" 4843561Skato 49235264SavgCTASSERT(sizeof(struct bootargs) == BOOTARGS_SIZE); 50235264SavgCTASSERT(offsetof(struct bootargs, bootinfo) == BA_BOOTINFO); 51235264SavgCTASSERT(offsetof(struct bootargs, bootflags) == BA_BOOTFLAGS); 52235264SavgCTASSERT(offsetof(struct bootinfo, bi_size) == BI_SIZE); 5358871Skato 5443561Skato/* Arguments passed in from the boot1/boot2 loader */ 55235264Savgstatic struct bootargs *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); 6668358Snyanvoid exit(int code); 6743561Skato 6843561Skato/* from vers.c */ 69312318Semasteextern char bootprog_info[]; 7043561Skato 7143561Skato/* XXX debugging */ 7243561Skatoextern char end[]; 7343561Skato 74153600Snyanstatic void *heap_top; 75153600Snyanstatic void *heap_bottom; 76153600Snyan 77220311Smarcelstatic uint64_t 78220311Smarcelpc98_loadaddr(u_int type, void *data, uint64_t addr) 79220311Smarcel{ 80220311Smarcel struct stat st; 81220311Smarcel 82220311Smarcel if (type == LOAD_ELF) 83220311Smarcel return (roundup(addr, PAGE_SIZE)); 84220311Smarcel 85220311Smarcel /* We cannot use 15M-16M area on pc98. */ 86220311Smarcel if (type == LOAD_RAW && addr < 0x1000000 && stat(data, &st) == 0 && 87220311Smarcel (st.st_size == -1 || addr + st.st_size > 0xf00000)) 88220311Smarcel addr = 0x1000000; 89220311Smarcel return (addr); 90220311Smarcel} 91220311Smarcel 9268358Snyanint 9343561Skatomain(void) 9443561Skato{ 9543561Skato int i; 9643561Skato 97201339Snyan /* Set machine type to PC98_SYSTEM_PARAMETER. */ 98201339Snyan set_machine_type(); 99201339Snyan 10043561Skato /* Pick up arguments */ 10143561Skato kargs = (void *)__args; 10243561Skato initial_howto = kargs->howto; 10343561Skato initial_bootdev = kargs->bootdev; 10458871Skato initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; 10543561Skato 106181436Sjhb /* Initialize the v86 register set to a known-good state. */ 107181436Sjhb bzero(&v86, sizeof(v86)); 108181436Sjhb v86.efl = PSL_RESERVED_DEFAULT | PSL_I; 109181436Sjhb 11043561Skato /* 11143561Skato * Initialise the heap as early as possible. Once this is done, malloc() is usable. 11243561Skato */ 11355342Snyan bios_getmem(); 11459167Skato 115200253Snyan#if defined(LOADER_BZIP2_SUPPORT) 116200255Snyan if (high_heap_size > 0) { 117200255Snyan heap_top = PTOV(high_heap_base + high_heap_size); 118200255Snyan heap_bottom = PTOV(high_heap_base); 119200255Snyan if (high_heap_base < memtop_copyin) 120200255Snyan memtop_copyin = high_heap_base; 121200255Snyan } else 122153600Snyan#endif 123200255Snyan { 124200255Snyan heap_top = (void *)PTOV(bios_basemem); 125200255Snyan heap_bottom = (void *)end; 126200255Snyan } 127153600Snyan setheap(heap_bottom, heap_top); 12858871Skato 12943561Skato /* 13043561Skato * XXX Chicken-and-egg problem; we want to have console output early, but some 13143561Skato * console attributes may depend on reading from eg. the boot device, which we 13243561Skato * can't do yet. 13343561Skato * 13443561Skato * We can use printf() etc. once this is done. 13543561Skato * If the previous boot stage has requested a serial console, prefer that. 13643561Skato */ 137150751Snyan bi_setboothowto(initial_howto); 138146698Sjhb if (initial_howto & RB_MULTIPLE) { 139146698Sjhb if (initial_howto & RB_SERIAL) 140146698Sjhb setenv("console", "comconsole vidconsole", 1); 141146698Sjhb else 142146698Sjhb setenv("console", "vidconsole comconsole", 1); 143146698Sjhb } else if (initial_howto & RB_SERIAL) 14443561Skato setenv("console", "comconsole", 1); 145146698Sjhb else if (initial_howto & RB_MUTE) 14666246Skato setenv("console", "nullconsole", 1); 14743561Skato cons_probe(); 14843561Skato 14943561Skato /* 150298230Sallanjude * Initialise the block cache. Set the upper limit. 15143561Skato */ 152298230Sallanjude bcache_init(32768, 512); 15343561Skato 15443561Skato /* 15586131Snyan * Special handling for PXE and CD booting. 15658871Skato */ 157126970Snyan if (kargs->bootinfo == 0) { 15886131Snyan /* 15986131Snyan * We only want the PXE disk to try to init itself in the below 16086131Snyan * walk through devsw if we actually booted off of PXE. 16186131Snyan */ 16286131Snyan if (kargs->bootflags & KARGS_FLAGS_PXE) 16386131Snyan pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); 16486131Snyan else if (kargs->bootflags & KARGS_FLAGS_CD) 16586131Snyan bc_add(initial_bootdev); 16658871Skato } 16758871Skato 168190046Snyan archsw.arch_autoload = i386_autoload; 169190046Snyan archsw.arch_getdev = i386_getdev; 170190046Snyan archsw.arch_copyin = i386_copyin; 171190046Snyan archsw.arch_copyout = i386_copyout; 172190046Snyan archsw.arch_readin = i386_readin; 173190046Snyan archsw.arch_isainb = isa_inb; 174190046Snyan archsw.arch_isaoutb = isa_outb; 175220311Smarcel archsw.arch_loadaddr = pc98_loadaddr; 176190046Snyan 17758871Skato /* 17843561Skato * March through the device switch probing for things. 17943561Skato */ 18043561Skato for (i = 0; devsw[i] != NULL; i++) 18143561Skato if (devsw[i]->dv_init != NULL) 18243561Skato (devsw[i]->dv_init)(); 18355342Snyan printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 184136891Snyan if (initial_bootinfo != NULL) { 185136891Snyan initial_bootinfo->bi_basemem = bios_basemem / 1024; 186136891Snyan initial_bootinfo->bi_extmem = bios_extmem / 1024; 187136891Snyan } 18843561Skato 189312318Semaste printf("\n%s", bootprog_info); 19043561Skato 19143561Skato extract_currdev(); /* set $currdev and $loaddev */ 19243561Skato setenv("LINES", "24", 1); /* optional */ 19343561Skato 194330311Skevans interact(); /* doesn't return */ 19568358Snyan 19668358Snyan /* if we ever get here, it is an error */ 19768358Snyan return (1); 19843561Skato} 19943561Skato 20043561Skato/* 20143561Skato * Set the 'current device' by (if possible) recovering the boot device as 20243561Skato * supplied by the initial bootstrap. 20343561Skato * 20443561Skato * XXX should be extended for netbooting. 20543561Skato */ 20643561Skatostatic void 20743561Skatoextract_currdev(void) 20843561Skato{ 209240852Snyan struct i386_devdesc new_currdev; 210240852Snyan int major; 211240852Snyan int biosdev = -1; 21243561Skato 21358871Skato /* Assume we are booting from a BIOS disk by default */ 21468358Snyan new_currdev.d_dev = &biosdisk; 21543561Skato 21658871Skato /* new-style boot loaders such as pxeldr and cdldr */ 217126970Snyan if (kargs->bootinfo == 0) { 21858871Skato if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { 21986131Snyan /* we are booting from a CD with cdboot */ 22086131Snyan new_currdev.d_dev = &bioscd; 221163897Smarcel new_currdev.d_unit = bc_bios2unit(initial_bootdev); 22258871Skato } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { 22358871Skato /* we are booting from pxeldr */ 22468358Snyan new_currdev.d_dev = &pxedisk; 225163897Smarcel new_currdev.d_unit = 0; 22658871Skato } else { 22758871Skato /* we don't know what our boot device is */ 22868358Snyan new_currdev.d_kind.biosdisk.slice = -1; 22968358Snyan new_currdev.d_kind.biosdisk.partition = 0; 23058871Skato biosdev = -1; 23158871Skato } 23258871Skato } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 23343561Skato /* The passed-in boot device is bad */ 23468358Snyan new_currdev.d_kind.biosdisk.slice = -1; 23568358Snyan new_currdev.d_kind.biosdisk.partition = 0; 23643561Skato biosdev = -1; 23743561Skato } else { 238172924Snyan new_currdev.d_kind.biosdisk.slice = B_SLICE(initial_bootdev) - 1; 23968358Snyan new_currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); 24043561Skato biosdev = initial_bootinfo->bi_bios_dev; 24143561Skato major = B_TYPE(initial_bootdev); 24243561Skato 24343561Skato /* 24443561Skato * If we are booted by an old bootstrap, we have to guess at the BIOS 245160964Syar * unit number. We will lose if there is more than one disk type 24643561Skato * and we are not booting from the lowest-numbered disk type 24743561Skato * (ie. SCSI when IDE also exists). 24843561Skato */ 24953218Snyan if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) { /* biosdev doesn't match major */ 25044463Skato if (B_TYPE(initial_bootdev) == 6) 25144463Skato biosdev = 0x30 + B_UNIT(initial_bootdev); 25244463Skato else 25344463Skato biosdev = (major << 3) + 0x80 + B_UNIT(initial_bootdev); 25453218Snyan } 25543561Skato } 25686131Snyan new_currdev.d_type = new_currdev.d_dev->dv_type; 257240852Snyan 25858871Skato /* 25958871Skato * If we are booting off of a BIOS disk and we didn't succeed in determining 26058871Skato * which one we booted off of, just use disk0: as a reasonable default. 26158871Skato */ 26286131Snyan if ((new_currdev.d_type == biosdisk.dv_type) && 263163897Smarcel ((new_currdev.d_unit = bd_bios2unit(biosdev)) == -1)) { 26443561Skato printf("Can't work out which disk we are booting from.\n" 26543561Skato "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); 266163897Smarcel new_currdev.d_unit = 0; 26743561Skato } 268240852Snyan 26968358Snyan env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev), 27068358Snyan i386_setcurrdev, env_nounset); 27168358Snyan env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset, 27268358Snyan env_nounset); 27343561Skato} 27443561Skato 27543561SkatoCOMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 27643561Skato 27743561Skatostatic int 27843561Skatocommand_reboot(int argc, char *argv[]) 27943561Skato{ 28059535Snyan int i; 28143561Skato 28259535Snyan for (i = 0; devsw[i] != NULL; ++i) 28359535Snyan if (devsw[i]->dv_cleanup != NULL) 28459535Snyan (devsw[i]->dv_cleanup)(); 28559535Snyan 28643561Skato printf("Rebooting...\n"); 28743561Skato delay(1000000); 28843561Skato __exit(0); 28943561Skato} 29043561Skato 29143561Skato/* provide this for panic, as it's not in the startup code */ 29243561Skatovoid 29343561Skatoexit(int code) 29443561Skato{ 29543561Skato __exit(code); 29643561Skato} 29743561Skato 29843561SkatoCOMMAND_SET(heap, "heap", "show heap usage", command_heap); 29943561Skato 30043561Skatostatic int 30143561Skatocommand_heap(int argc, char *argv[]) 30243561Skato{ 30343561Skato mallocstats(); 304153600Snyan printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom, 305153600Snyan sbrk(0), heap_top); 30643561Skato return(CMD_OK); 30743561Skato} 30843561Skato 309240854Snyan/* ISA bus access functions for PnP. */ 310240852Snyanstatic int 31143561Skatoisa_inb(int port) 31243561Skato{ 313240854Snyan 314240854Snyan return (inb(port)); 31543561Skato} 31643561Skato 31743561Skatostatic void 31843561Skatoisa_outb(int port, int value) 31943561Skato{ 320240854Snyan 321240854Snyan outb(port, value); 32243561Skato} 323