main.c revision 201339
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 201339 2009-12-31 12:05:48Z nyan $"); 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> 3943561Skato#include <sys/reboot.h> 4043561Skato 4143561Skato#include "bootstrap.h" 4245241Skato#include "libi386/libi386.h" 43201339Snyan#include "libpc98/libpc98.h" 4443561Skato#include "btxv86.h" 4543561Skato 4658871Skato#define KARGS_FLAGS_CD 0x1 4758871Skato#define KARGS_FLAGS_PXE 0x2 4858871Skato 4943561Skato/* Arguments passed in from the boot1/boot2 loader */ 5043561Skatostatic struct 5143561Skato{ 5243561Skato u_int32_t howto; 5343561Skato u_int32_t bootdev; 5458871Skato u_int32_t bootflags; 5558871Skato u_int32_t pxeinfo; 5643561Skato u_int32_t res2; 5743561Skato u_int32_t bootinfo; 5843561Skato} *kargs; 5943561Skato 6043561Skatostatic u_int32_t initial_howto; 6143561Skatostatic u_int32_t initial_bootdev; 6243561Skatostatic struct bootinfo *initial_bootinfo; 6343561Skato 6443561Skatostruct arch_switch archsw; /* MI/MD interface boundary */ 6543561Skato 6643561Skatostatic void extract_currdev(void); 6743561Skatostatic int isa_inb(int port); 6843561Skatostatic void isa_outb(int port, int value); 6968358Snyanvoid exit(int code); 7043561Skato 7143561Skato/* from vers.c */ 7243561Skatoextern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[]; 7343561Skato 7443561Skato/* XXX debugging */ 7543561Skatoextern char end[]; 7643561Skato 77153600Snyanstatic void *heap_top; 78153600Snyanstatic void *heap_bottom; 79153600Snyan 8068358Snyanint 8143561Skatomain(void) 8243561Skato{ 8343561Skato int i; 8443561Skato 85201339Snyan /* Set machine type to PC98_SYSTEM_PARAMETER. */ 86201339Snyan set_machine_type(); 87201339Snyan 8843561Skato /* Pick up arguments */ 8943561Skato kargs = (void *)__args; 9043561Skato initial_howto = kargs->howto; 9143561Skato initial_bootdev = kargs->bootdev; 9258871Skato initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; 9343561Skato 94181436Sjhb /* Initialize the v86 register set to a known-good state. */ 95181436Sjhb bzero(&v86, sizeof(v86)); 96181436Sjhb v86.efl = PSL_RESERVED_DEFAULT | PSL_I; 97181436Sjhb 9843561Skato /* 9943561Skato * Initialise the heap as early as possible. Once this is done, malloc() is usable. 10043561Skato */ 10155342Snyan bios_getmem(); 10259167Skato 103200253Snyan#if defined(LOADER_BZIP2_SUPPORT) 104200255Snyan if (high_heap_size > 0) { 105200255Snyan heap_top = PTOV(high_heap_base + high_heap_size); 106200255Snyan heap_bottom = PTOV(high_heap_base); 107200255Snyan if (high_heap_base < memtop_copyin) 108200255Snyan memtop_copyin = high_heap_base; 109200255Snyan } else 110153600Snyan#endif 111200255Snyan { 112200255Snyan heap_top = (void *)PTOV(bios_basemem); 113200255Snyan heap_bottom = (void *)end; 114200255Snyan } 115153600Snyan setheap(heap_bottom, heap_top); 11658871Skato 11743561Skato /* 11843561Skato * XXX Chicken-and-egg problem; we want to have console output early, but some 11943561Skato * console attributes may depend on reading from eg. the boot device, which we 12043561Skato * can't do yet. 12143561Skato * 12243561Skato * We can use printf() etc. once this is done. 12343561Skato * If the previous boot stage has requested a serial console, prefer that. 12443561Skato */ 125150751Snyan bi_setboothowto(initial_howto); 126146698Sjhb if (initial_howto & RB_MULTIPLE) { 127146698Sjhb if (initial_howto & RB_SERIAL) 128146698Sjhb setenv("console", "comconsole vidconsole", 1); 129146698Sjhb else 130146698Sjhb setenv("console", "vidconsole comconsole", 1); 131146698Sjhb } else if (initial_howto & RB_SERIAL) 13243561Skato setenv("console", "comconsole", 1); 133146698Sjhb else if (initial_howto & RB_MUTE) 13466246Skato setenv("console", "nullconsole", 1); 13543561Skato cons_probe(); 13643561Skato 13743561Skato /* 13843561Skato * Initialise the block cache 13943561Skato */ 14043561Skato bcache_init(32, 512); /* 16k cache XXX tune this */ 14143561Skato 14243561Skato /* 14386131Snyan * Special handling for PXE and CD booting. 14458871Skato */ 145126970Snyan if (kargs->bootinfo == 0) { 14686131Snyan /* 14786131Snyan * We only want the PXE disk to try to init itself in the below 14886131Snyan * walk through devsw if we actually booted off of PXE. 14986131Snyan */ 15086131Snyan if (kargs->bootflags & KARGS_FLAGS_PXE) 15186131Snyan pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); 15286131Snyan else if (kargs->bootflags & KARGS_FLAGS_CD) 15386131Snyan bc_add(initial_bootdev); 15458871Skato } 15558871Skato 156190046Snyan archsw.arch_autoload = i386_autoload; 157190046Snyan archsw.arch_getdev = i386_getdev; 158190046Snyan archsw.arch_copyin = i386_copyin; 159190046Snyan archsw.arch_copyout = i386_copyout; 160190046Snyan archsw.arch_readin = i386_readin; 161190046Snyan archsw.arch_isainb = isa_inb; 162190046Snyan archsw.arch_isaoutb = isa_outb; 163190046Snyan 16458871Skato /* 16543561Skato * March through the device switch probing for things. 16643561Skato */ 16743561Skato for (i = 0; devsw[i] != NULL; i++) 16843561Skato if (devsw[i]->dv_init != NULL) 16943561Skato (devsw[i]->dv_init)(); 17055342Snyan printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 171136891Snyan if (initial_bootinfo != NULL) { 172136891Snyan initial_bootinfo->bi_basemem = bios_basemem / 1024; 173136891Snyan initial_bootinfo->bi_extmem = bios_extmem / 1024; 174136891Snyan } 17543561Skato 17643561Skato printf("\n"); 17755342Snyan printf("%s, Revision %s\n", bootprog_name, bootprog_rev); 17843561Skato printf("(%s, %s)\n", bootprog_maker, bootprog_date); 17943561Skato 18043561Skato extract_currdev(); /* set $currdev and $loaddev */ 18143561Skato setenv("LINES", "24", 1); /* optional */ 18243561Skato 18343561Skato interact(); /* doesn't return */ 18468358Snyan 18568358Snyan /* if we ever get here, it is an error */ 18668358Snyan return (1); 18743561Skato} 18843561Skato 18943561Skato/* 19043561Skato * Set the 'current device' by (if possible) recovering the boot device as 19143561Skato * supplied by the initial bootstrap. 19243561Skato * 19343561Skato * XXX should be extended for netbooting. 19443561Skato */ 19543561Skatostatic void 19643561Skatoextract_currdev(void) 19743561Skato{ 19868358Snyan struct i386_devdesc new_currdev; 199190046Snyan int major; 200190046Snyan int biosdev = -1; 20143561Skato 20258871Skato /* Assume we are booting from a BIOS disk by default */ 20368358Snyan new_currdev.d_dev = &biosdisk; 20443561Skato 20558871Skato /* new-style boot loaders such as pxeldr and cdldr */ 206126970Snyan if (kargs->bootinfo == 0) { 20758871Skato if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { 20886131Snyan /* we are booting from a CD with cdboot */ 20986131Snyan new_currdev.d_dev = &bioscd; 210163897Smarcel new_currdev.d_unit = bc_bios2unit(initial_bootdev); 21158871Skato } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { 21258871Skato /* we are booting from pxeldr */ 21368358Snyan new_currdev.d_dev = &pxedisk; 214163897Smarcel new_currdev.d_unit = 0; 21558871Skato } else { 21658871Skato /* we don't know what our boot device is */ 21768358Snyan new_currdev.d_kind.biosdisk.slice = -1; 21868358Snyan new_currdev.d_kind.biosdisk.partition = 0; 21958871Skato biosdev = -1; 22058871Skato } 22158871Skato } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 22243561Skato /* The passed-in boot device is bad */ 22368358Snyan new_currdev.d_kind.biosdisk.slice = -1; 22468358Snyan new_currdev.d_kind.biosdisk.partition = 0; 22543561Skato biosdev = -1; 22643561Skato } else { 227172924Snyan new_currdev.d_kind.biosdisk.slice = B_SLICE(initial_bootdev) - 1; 22868358Snyan new_currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); 22943561Skato biosdev = initial_bootinfo->bi_bios_dev; 23043561Skato major = B_TYPE(initial_bootdev); 23143561Skato 23243561Skato /* 23343561Skato * If we are booted by an old bootstrap, we have to guess at the BIOS 234160964Syar * unit number. We will lose if there is more than one disk type 23543561Skato * and we are not booting from the lowest-numbered disk type 23643561Skato * (ie. SCSI when IDE also exists). 23743561Skato */ 23853218Snyan if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) { /* biosdev doesn't match major */ 23944463Skato if (B_TYPE(initial_bootdev) == 6) 24044463Skato biosdev = 0x30 + B_UNIT(initial_bootdev); 24144463Skato else 24244463Skato biosdev = (major << 3) + 0x80 + B_UNIT(initial_bootdev); 24353218Snyan } 24443561Skato } 24586131Snyan new_currdev.d_type = new_currdev.d_dev->dv_type; 24643561Skato 24758871Skato /* 24858871Skato * If we are booting off of a BIOS disk and we didn't succeed in determining 24958871Skato * which one we booted off of, just use disk0: as a reasonable default. 25058871Skato */ 25186131Snyan if ((new_currdev.d_type == biosdisk.dv_type) && 252163897Smarcel ((new_currdev.d_unit = bd_bios2unit(biosdev)) == -1)) { 25343561Skato printf("Can't work out which disk we are booting from.\n" 25443561Skato "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); 255163897Smarcel new_currdev.d_unit = 0; 25643561Skato } 25768358Snyan env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev), 25868358Snyan i386_setcurrdev, env_nounset); 25968358Snyan env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset, 26068358Snyan env_nounset); 26143561Skato} 26243561Skato 26343561SkatoCOMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 26443561Skato 26543561Skatostatic int 26643561Skatocommand_reboot(int argc, char *argv[]) 26743561Skato{ 26859535Snyan int i; 26943561Skato 27059535Snyan for (i = 0; devsw[i] != NULL; ++i) 27159535Snyan if (devsw[i]->dv_cleanup != NULL) 27259535Snyan (devsw[i]->dv_cleanup)(); 27359535Snyan 27443561Skato printf("Rebooting...\n"); 27543561Skato delay(1000000); 27643561Skato __exit(0); 27743561Skato} 27843561Skato 27943561Skato/* provide this for panic, as it's not in the startup code */ 28043561Skatovoid 28143561Skatoexit(int code) 28243561Skato{ 28343561Skato __exit(code); 28443561Skato} 28543561Skato 28643561SkatoCOMMAND_SET(heap, "heap", "show heap usage", command_heap); 28743561Skato 28843561Skatostatic int 28943561Skatocommand_heap(int argc, char *argv[]) 29043561Skato{ 29143561Skato mallocstats(); 292153600Snyan printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom, 293153600Snyan sbrk(0), heap_top); 29443561Skato return(CMD_OK); 29543561Skato} 29643561Skato 29743561Skato/* ISA bus access functions for PnP, derived from <machine/cpufunc.h> */ 29843561Skatostatic int 29943561Skatoisa_inb(int port) 30043561Skato{ 30143561Skato u_char data; 30243561Skato 30343561Skato if (__builtin_constant_p(port) && 30443561Skato (((port) & 0xffff) < 0x100) && 30543561Skato ((port) < 0x10000)) { 30643561Skato __asm __volatile("inb %1,%0" : "=a" (data) : "id" ((u_short)(port))); 30743561Skato } else { 30843561Skato __asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port)); 30943561Skato } 31043561Skato return(data); 31143561Skato} 31243561Skato 31343561Skatostatic void 31443561Skatoisa_outb(int port, int value) 31543561Skato{ 31643561Skato u_char al = value; 31743561Skato 31843561Skato if (__builtin_constant_p(port) && 31943561Skato (((port) & 0xffff) < 0x100) && 32043561Skato ((port) < 0x10000)) { 32143561Skato __asm __volatile("outb %0,%1" : : "a" (al), "id" ((u_short)(port))); 32243561Skato } else { 32343561Skato __asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port)); 32443561Skato } 32543561Skato} 32643561Skato 327