main.c revision 220311
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 220311 2011-04-03 22:31:51Z marcel $"); 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> 38181436Sjhb#include <machine/psl.h> 39220311Smarcel#include <sys/param.h> 4043561Skato#include <sys/reboot.h> 4143561Skato 4243561Skato#include "bootstrap.h" 4345241Skato#include "libi386/libi386.h" 44201339Snyan#include "libpc98/libpc98.h" 4543561Skato#include "btxv86.h" 4643561Skato 4758871Skato#define KARGS_FLAGS_CD 0x1 4858871Skato#define KARGS_FLAGS_PXE 0x2 4958871Skato 5043561Skato/* Arguments passed in from the boot1/boot2 loader */ 5143561Skatostatic struct 5243561Skato{ 5343561Skato u_int32_t howto; 5443561Skato u_int32_t bootdev; 5558871Skato u_int32_t bootflags; 5658871Skato u_int32_t pxeinfo; 5743561Skato u_int32_t res2; 5843561Skato u_int32_t bootinfo; 5943561Skato} *kargs; 6043561Skato 6143561Skatostatic u_int32_t initial_howto; 6243561Skatostatic u_int32_t initial_bootdev; 6343561Skatostatic struct bootinfo *initial_bootinfo; 6443561Skato 6543561Skatostruct arch_switch archsw; /* MI/MD interface boundary */ 6643561Skato 6743561Skatostatic void extract_currdev(void); 6843561Skatostatic int isa_inb(int port); 6943561Skatostatic void isa_outb(int port, int value); 7068358Snyanvoid exit(int code); 7143561Skato 7243561Skato/* from vers.c */ 7343561Skatoextern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[]; 7443561Skato 7543561Skato/* XXX debugging */ 7643561Skatoextern char end[]; 7743561Skato 78153600Snyanstatic void *heap_top; 79153600Snyanstatic void *heap_bottom; 80153600Snyan 81220311Smarcelstatic uint64_t 82220311Smarcelpc98_loadaddr(u_int type, void *data, uint64_t addr) 83220311Smarcel{ 84220311Smarcel struct stat st; 85220311Smarcel 86220311Smarcel if (type == LOAD_ELF) 87220311Smarcel return (roundup(addr, PAGE_SIZE)); 88220311Smarcel 89220311Smarcel /* We cannot use 15M-16M area on pc98. */ 90220311Smarcel if (type == LOAD_RAW && addr < 0x1000000 && stat(data, &st) == 0 && 91220311Smarcel (st.st_size == -1 || addr + st.st_size > 0xf00000)) 92220311Smarcel addr = 0x1000000; 93220311Smarcel return (addr); 94220311Smarcel} 95220311Smarcel 9668358Snyanint 9743561Skatomain(void) 9843561Skato{ 9943561Skato int i; 10043561Skato 101201339Snyan /* Set machine type to PC98_SYSTEM_PARAMETER. */ 102201339Snyan set_machine_type(); 103201339Snyan 10443561Skato /* Pick up arguments */ 10543561Skato kargs = (void *)__args; 10643561Skato initial_howto = kargs->howto; 10743561Skato initial_bootdev = kargs->bootdev; 10858871Skato initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; 10943561Skato 110181436Sjhb /* Initialize the v86 register set to a known-good state. */ 111181436Sjhb bzero(&v86, sizeof(v86)); 112181436Sjhb v86.efl = PSL_RESERVED_DEFAULT | PSL_I; 113181436Sjhb 11443561Skato /* 11543561Skato * Initialise the heap as early as possible. Once this is done, malloc() is usable. 11643561Skato */ 11755342Snyan bios_getmem(); 11859167Skato 119200253Snyan#if defined(LOADER_BZIP2_SUPPORT) 120200255Snyan if (high_heap_size > 0) { 121200255Snyan heap_top = PTOV(high_heap_base + high_heap_size); 122200255Snyan heap_bottom = PTOV(high_heap_base); 123200255Snyan if (high_heap_base < memtop_copyin) 124200255Snyan memtop_copyin = high_heap_base; 125200255Snyan } else 126153600Snyan#endif 127200255Snyan { 128200255Snyan heap_top = (void *)PTOV(bios_basemem); 129200255Snyan heap_bottom = (void *)end; 130200255Snyan } 131153600Snyan setheap(heap_bottom, heap_top); 13258871Skato 13343561Skato /* 13443561Skato * XXX Chicken-and-egg problem; we want to have console output early, but some 13543561Skato * console attributes may depend on reading from eg. the boot device, which we 13643561Skato * can't do yet. 13743561Skato * 13843561Skato * We can use printf() etc. once this is done. 13943561Skato * If the previous boot stage has requested a serial console, prefer that. 14043561Skato */ 141150751Snyan bi_setboothowto(initial_howto); 142146698Sjhb if (initial_howto & RB_MULTIPLE) { 143146698Sjhb if (initial_howto & RB_SERIAL) 144146698Sjhb setenv("console", "comconsole vidconsole", 1); 145146698Sjhb else 146146698Sjhb setenv("console", "vidconsole comconsole", 1); 147146698Sjhb } else if (initial_howto & RB_SERIAL) 14843561Skato setenv("console", "comconsole", 1); 149146698Sjhb else if (initial_howto & RB_MUTE) 15066246Skato setenv("console", "nullconsole", 1); 15143561Skato cons_probe(); 15243561Skato 15343561Skato /* 15443561Skato * Initialise the block cache 15543561Skato */ 15643561Skato bcache_init(32, 512); /* 16k cache XXX tune this */ 15743561Skato 15843561Skato /* 15986131Snyan * Special handling for PXE and CD booting. 16058871Skato */ 161126970Snyan if (kargs->bootinfo == 0) { 16286131Snyan /* 16386131Snyan * We only want the PXE disk to try to init itself in the below 16486131Snyan * walk through devsw if we actually booted off of PXE. 16586131Snyan */ 16686131Snyan if (kargs->bootflags & KARGS_FLAGS_PXE) 16786131Snyan pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); 16886131Snyan else if (kargs->bootflags & KARGS_FLAGS_CD) 16986131Snyan bc_add(initial_bootdev); 17058871Skato } 17158871Skato 172190046Snyan archsw.arch_autoload = i386_autoload; 173190046Snyan archsw.arch_getdev = i386_getdev; 174190046Snyan archsw.arch_copyin = i386_copyin; 175190046Snyan archsw.arch_copyout = i386_copyout; 176190046Snyan archsw.arch_readin = i386_readin; 177190046Snyan archsw.arch_isainb = isa_inb; 178190046Snyan archsw.arch_isaoutb = isa_outb; 179220311Smarcel archsw.arch_loadaddr = pc98_loadaddr; 180190046Snyan 18158871Skato /* 18243561Skato * March through the device switch probing for things. 18343561Skato */ 18443561Skato for (i = 0; devsw[i] != NULL; i++) 18543561Skato if (devsw[i]->dv_init != NULL) 18643561Skato (devsw[i]->dv_init)(); 18755342Snyan printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 188136891Snyan if (initial_bootinfo != NULL) { 189136891Snyan initial_bootinfo->bi_basemem = bios_basemem / 1024; 190136891Snyan initial_bootinfo->bi_extmem = bios_extmem / 1024; 191136891Snyan } 19243561Skato 19343561Skato printf("\n"); 19455342Snyan printf("%s, Revision %s\n", bootprog_name, bootprog_rev); 19543561Skato printf("(%s, %s)\n", bootprog_maker, bootprog_date); 19643561Skato 19743561Skato extract_currdev(); /* set $currdev and $loaddev */ 19843561Skato setenv("LINES", "24", 1); /* optional */ 19943561Skato 20043561Skato interact(); /* doesn't return */ 20168358Snyan 20268358Snyan /* if we ever get here, it is an error */ 20368358Snyan return (1); 20443561Skato} 20543561Skato 20643561Skato/* 20743561Skato * Set the 'current device' by (if possible) recovering the boot device as 20843561Skato * supplied by the initial bootstrap. 20943561Skato * 21043561Skato * XXX should be extended for netbooting. 21143561Skato */ 21243561Skatostatic void 21343561Skatoextract_currdev(void) 21443561Skato{ 21568358Snyan struct i386_devdesc new_currdev; 216190046Snyan int major; 217190046Snyan int biosdev = -1; 21843561Skato 21958871Skato /* Assume we are booting from a BIOS disk by default */ 22068358Snyan new_currdev.d_dev = &biosdisk; 22143561Skato 22258871Skato /* new-style boot loaders such as pxeldr and cdldr */ 223126970Snyan if (kargs->bootinfo == 0) { 22458871Skato if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { 22586131Snyan /* we are booting from a CD with cdboot */ 22686131Snyan new_currdev.d_dev = &bioscd; 227163897Smarcel new_currdev.d_unit = bc_bios2unit(initial_bootdev); 22858871Skato } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { 22958871Skato /* we are booting from pxeldr */ 23068358Snyan new_currdev.d_dev = &pxedisk; 231163897Smarcel new_currdev.d_unit = 0; 23258871Skato } else { 23358871Skato /* we don't know what our boot device is */ 23468358Snyan new_currdev.d_kind.biosdisk.slice = -1; 23568358Snyan new_currdev.d_kind.biosdisk.partition = 0; 23658871Skato biosdev = -1; 23758871Skato } 23858871Skato } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 23943561Skato /* The passed-in boot device is bad */ 24068358Snyan new_currdev.d_kind.biosdisk.slice = -1; 24168358Snyan new_currdev.d_kind.biosdisk.partition = 0; 24243561Skato biosdev = -1; 24343561Skato } else { 244172924Snyan new_currdev.d_kind.biosdisk.slice = B_SLICE(initial_bootdev) - 1; 24568358Snyan new_currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); 24643561Skato biosdev = initial_bootinfo->bi_bios_dev; 24743561Skato major = B_TYPE(initial_bootdev); 24843561Skato 24943561Skato /* 25043561Skato * If we are booted by an old bootstrap, we have to guess at the BIOS 251160964Syar * unit number. We will lose if there is more than one disk type 25243561Skato * and we are not booting from the lowest-numbered disk type 25343561Skato * (ie. SCSI when IDE also exists). 25443561Skato */ 25553218Snyan if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) { /* biosdev doesn't match major */ 25644463Skato if (B_TYPE(initial_bootdev) == 6) 25744463Skato biosdev = 0x30 + B_UNIT(initial_bootdev); 25844463Skato else 25944463Skato biosdev = (major << 3) + 0x80 + B_UNIT(initial_bootdev); 26053218Snyan } 26143561Skato } 26286131Snyan new_currdev.d_type = new_currdev.d_dev->dv_type; 26343561Skato 26458871Skato /* 26558871Skato * If we are booting off of a BIOS disk and we didn't succeed in determining 26658871Skato * which one we booted off of, just use disk0: as a reasonable default. 26758871Skato */ 26886131Snyan if ((new_currdev.d_type == biosdisk.dv_type) && 269163897Smarcel ((new_currdev.d_unit = bd_bios2unit(biosdev)) == -1)) { 27043561Skato printf("Can't work out which disk we are booting from.\n" 27143561Skato "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); 272163897Smarcel new_currdev.d_unit = 0; 27343561Skato } 27468358Snyan env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev), 27568358Snyan i386_setcurrdev, env_nounset); 27668358Snyan env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset, 27768358Snyan env_nounset); 27843561Skato} 27943561Skato 28043561SkatoCOMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 28143561Skato 28243561Skatostatic int 28343561Skatocommand_reboot(int argc, char *argv[]) 28443561Skato{ 28559535Snyan int i; 28643561Skato 28759535Snyan for (i = 0; devsw[i] != NULL; ++i) 28859535Snyan if (devsw[i]->dv_cleanup != NULL) 28959535Snyan (devsw[i]->dv_cleanup)(); 29059535Snyan 29143561Skato printf("Rebooting...\n"); 29243561Skato delay(1000000); 29343561Skato __exit(0); 29443561Skato} 29543561Skato 29643561Skato/* provide this for panic, as it's not in the startup code */ 29743561Skatovoid 29843561Skatoexit(int code) 29943561Skato{ 30043561Skato __exit(code); 30143561Skato} 30243561Skato 30343561SkatoCOMMAND_SET(heap, "heap", "show heap usage", command_heap); 30443561Skato 30543561Skatostatic int 30643561Skatocommand_heap(int argc, char *argv[]) 30743561Skato{ 30843561Skato mallocstats(); 309153600Snyan printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom, 310153600Snyan sbrk(0), heap_top); 31143561Skato return(CMD_OK); 31243561Skato} 31343561Skato 31443561Skato/* ISA bus access functions for PnP, derived from <machine/cpufunc.h> */ 31543561Skatostatic int 31643561Skatoisa_inb(int port) 31743561Skato{ 31843561Skato u_char data; 31943561Skato 32043561Skato if (__builtin_constant_p(port) && 32143561Skato (((port) & 0xffff) < 0x100) && 32243561Skato ((port) < 0x10000)) { 32343561Skato __asm __volatile("inb %1,%0" : "=a" (data) : "id" ((u_short)(port))); 32443561Skato } else { 32543561Skato __asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port)); 32643561Skato } 32743561Skato return(data); 32843561Skato} 32943561Skato 33043561Skatostatic void 33143561Skatoisa_outb(int port, int value) 33243561Skato{ 33343561Skato u_char al = value; 33443561Skato 33543561Skato if (__builtin_constant_p(port) && 33643561Skato (((port) & 0xffff) < 0x100) && 33743561Skato ((port) < 0x10000)) { 33843561Skato __asm __volatile("outb %0,%1" : : "a" (al), "id" ((u_short)(port))); 33943561Skato } else { 34043561Skato __asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port)); 34143561Skato } 34243561Skato} 34343561Skato 344