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Diffstat (limited to 'sys/i386/boot/biosboot/boot.c')
-rw-r--r--sys/i386/boot/biosboot/boot.c323
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diff --git a/sys/i386/boot/biosboot/boot.c b/sys/i386/boot/biosboot/boot.c
new file mode 100644
index 000000000000..805303e6dab2
--- /dev/null
+++ b/sys/i386/boot/biosboot/boot.c
@@ -0,0 +1,323 @@
+/*
+ * Ported to boot 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
+ *
+ * Mach Operating System
+ * Copyright (c) 1992, 1991 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
+ * School of Computer Science
+ * Carnegie Mellon University
+ * Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ *
+ * PATCHES MAGIC LEVEL PATCH THAT GOT US HERE
+ * -------------------- ----- ----------------------
+ * CURRENT PATCH LEVEL: 1 00159
+ * -------------------- ----- ----------------------
+ *
+ * 23 May 93 Rodney W. Grimes Added pad to kernel size for structs
+ * allocated by locore.s
+ */
+
+/*
+ * HISTORY
+ * $Log: boot.c,v $
+ * Revision 2.2 92/04/04 11:34:37 rpd
+ * Change date in banner.
+ * [92/04/03 16:51:14 rvb]
+ *
+ * Fix Intel Copyright as per B. Davies authorization.
+ * [92/04/03 rvb]
+ * From 2.5 version.
+ * [92/03/30 mg32]
+ *
+ */
+
+/*
+ Copyright 1988, 1989, 1990, 1991, 1992
+ by Intel Corporation, Santa Clara, California.
+
+ All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appears in all
+copies and that both the copyright notice and this permission notice
+appear in supporting documentation, and that the name of Intel
+not be used in advertising or publicity pertaining to distribution
+of the software without specific, written prior permission.
+
+INTEL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
+IN NO EVENT SHALL INTEL BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
+CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
+NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <sys/param.h>
+#include "boot.h"
+#include <a.out.h>
+#include <sys/reboot.h>
+
+
+struct exec head;
+int argv[10], esym;
+char *name;
+char *names[] = {
+ "/386bsd", "/386bsd.old",
+ "/vmunix", "/vmunix.old"
+};
+#define NUMNAMES (sizeof(names)/sizeof(char *))
+
+extern int end;
+boot(drive)
+int drive;
+{
+ int loadflags, currname = 0;
+ printf("\n>> 386bsd BOOT @ 0x%x: %d/%d k of memory [20/9/92]\n",
+ ouraddr,
+ argv[7] = memsize(0),
+ argv[8] = memsize(1));
+ printf("use options hd(1,...... to boot sd0 when wd0 is also installed\n");
+ gateA20();
+loadstart:
+ /***************************************************************\
+ * As a default set it to the first partition of the first *
+ * floppy or hard drive *
+ \***************************************************************/
+ part = unit = 0;
+ maj = (drive&0x80 ? 0 : 2); /* a good first bet */
+ name = names[currname++];
+
+ loadflags = 0;
+ if (currname == NUMNAMES)
+ currname = 0;
+ getbootdev(&loadflags);
+ if (openrd()) {
+ printf("Can't find %s\n", name);
+ goto loadstart;
+ }
+/* if (inode.i_mode&IEXEC)
+ loadflags |= RB_KDB;
+*/
+ loadprog(loadflags);
+ goto loadstart;
+}
+
+loadprog(howto)
+ int howto;
+{
+ long int startaddr;
+ long int addr; /* physical address.. not directly useable */
+ int i;
+ static int (*x_entry)() = 0;
+ unsigned char tmpbuf[4096]; /* we need to load the first 4k here */
+
+ argv[3] = 0;
+ argv[4] = 0;
+ read(&head, sizeof(head));
+ if (head.a_magic == 0413 )
+ {
+ poff = 4096;
+ }
+ else
+ {
+ printf("Invalid format!\n");
+ return;
+ }
+
+ startaddr = (int)head.a_entry;
+ addr = (startaddr & 0x00f00000); /* some MEG boundary */
+ printf("Booting %s(%d,%c)%s @ 0x%x\n"
+ , devs[maj]
+ , unit
+ , 'a'+part
+ , name
+ , addr);
+ if(addr < ouraddr)
+ {
+ if((addr + head.a_text + head.a_data) > ouraddr)
+ {
+ printf("kernel will not fit below loader\n");
+ return;
+ }
+ /*
+ * The +28672 is for memory allocated by locore.s that must
+ * fit in the bss!
+ */
+ if((addr + head.a_text + head.a_data + head.a_bss + 28672) > 0xa0000)
+ {
+ printf("kernel too big, won't fit in 640K with bss\n");
+ printf("Only hope is to link the kernel for > 1MB\n");
+ return;
+ }
+ if((addr + head.a_text + head.a_data + head.a_bss) > ouraddr)
+ {
+ printf("loader overlaps bss, kernel must bzero\n");
+ }
+ }
+ printf("text=0x%x", head.a_text);
+ /********************************************************/
+ /* LOAD THE TEXT SEGMENT */
+ /* don't clobber the first 4k yet (BIOS NEEDS IT) */
+ /********************************************************/
+ read(tmpbuf,4096);
+ addr += 4096;
+ xread(addr, head.a_text - 4096);
+ addr += head.a_text - 4096;
+
+ /********************************************************/
+ /* Load the Initialised data after the text */
+ /********************************************************/
+ while (addr & CLOFSET)
+ *(char *)addr++ = 0;
+
+ printf(" data=0x%x", head.a_data);
+ xread(addr, head.a_data);
+ addr += head.a_data;
+
+ /********************************************************/
+ /* Skip over the uninitialised data */
+ /* (but clear it) */
+ /********************************************************/
+ printf(" bss=0x%x", head.a_bss);
+ if( (addr < ouraddr) && ((addr + head.a_bss) > ouraddr))
+ {
+ pbzero(addr,ouraddr - (int)addr);
+ }
+ else
+ {
+ pbzero(addr,head.a_bss);
+ }
+ argv[3] = (addr += head.a_bss);
+
+#ifdef LOADSYMS /* not yet, haven't worked this out yet */
+ if (addr > 0x100000)
+ {
+ /********************************************************/
+ /*copy in the symbol header */
+ /********************************************************/
+ pcpy(&head.a_syms, addr, sizeof(head.a_syms));
+ addr += sizeof(head.a_syms);
+
+ /********************************************************/
+ /* READ in the symbol table */
+ /********************************************************/
+ printf(" symbols=[+0x%x", head.a_syms);
+ xread(addr, head.a_syms);
+ addr += head.a_syms;
+
+ /********************************************************/
+ /* Followed by the next integer (another header) */
+ /* more debug symbols? */
+ /********************************************************/
+ read(&i, sizeof(int));
+ pcpy(&i, addr, sizeof(int));
+ i -= sizeof(int);
+ addr += sizeof(int);
+
+
+ /********************************************************/
+ /* and that many bytes of (debug symbols?) */
+ /********************************************************/
+ printf("+0x%x]", i);
+ xread(addr, i);
+ addr += i;
+ }
+#endif LOADSYMS
+ /********************************************************/
+ /* and note the end address of all this */
+ /********************************************************/
+
+ argv[4] = ((addr+sizeof(int)-1))&~(sizeof(int)-1);
+ printf(" total=0x%x",argv[4]);
+
+
+ /*
+ * We now pass the various bootstrap parameters to the loaded
+ * image via the argument list
+ * (THIS IS A BIT OF HISTORY FROM MACH.. LEAVE FOR NOW)
+ * arg1 = boot flags
+ * arg2 = boot device
+ * arg3 = start of symbol table (0 if not loaded)
+ * arg4 = end of symbol table (0 if not loaded)
+ * arg5 = transfer address from image
+ * arg6 = transfer address for next image pointer
+ */
+ switch(maj)
+ {
+ case 2:
+ printf("\n\nInsert file system floppy \n");
+ getchar();
+ break;
+ case 4:
+ break;
+ }
+ argv[1] = howto;
+ argv[2] = (MAKEBOOTDEV(maj, 0, 0, unit, part)) ;
+ argv[5] = (head.a_entry &= 0xfffffff);
+ argv[6] = (int) &x_entry;
+ argv[0] = 8;
+ /****************************************************************/
+ /* copy that first page and overwrite any BIOS variables */
+ /****************************************************************/
+ printf(" entry point=0x%x \n" ,((int)startaddr) & 0xffffff);
+ pcpy(tmpbuf, 0, 4096);
+ startprog(((int)startaddr & 0xffffff),argv);
+}
+
+char namebuf[100];
+getbootdev(howto)
+ int *howto;
+{
+ char c, *ptr = namebuf;
+ printf("Boot: [[[%s(%d,%c)]%s][-s][-a][-d]] :- "
+ , devs[maj]
+ , unit
+ , 'a'+part
+ , name);
+ if (gets(namebuf)) {
+ while (c=*ptr) {
+ while (c==' ')
+ c = *++ptr;
+ if (!c)
+ return;
+ if (c=='-')
+ while ((c = *++ptr) && c!=' ')
+ switch (c) {
+ case 'a':
+ *howto |= RB_ASKNAME; continue;
+ case 's':
+ *howto |= RB_SINGLE; continue;
+ case 'd':
+ *howto |= RB_KDB; continue;
+ case 'b':
+ *howto |= RB_HALT; continue;
+ }
+ else {
+ name = ptr;
+ while ((c = *++ptr) && c!=' ');
+ if (c)
+ *ptr++ = 0;
+ }
+ }
+ }
+}
+
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