640 lines
16 KiB
C
640 lines
16 KiB
C
/* $NetBSD: main.c,v 1.5 1994/10/27 04:21:17 cgd Exp $ */
|
|
|
|
/*
|
|
* source code in this file is from:
|
|
* 386BSD boot blocks by Julian Elischer (julian@tfs.com)
|
|
* 386BSD Adaptec 1542 SCSI boot blocks by Pace Willisson (pace@blitz.com)
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
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 "config.h"
|
|
#include "nbtypes.h"
|
|
#include "assert.h"
|
|
#include "param.h"
|
|
#include "packet.h"
|
|
#include "ether.h"
|
|
#include "inet.h"
|
|
#include "arp.h"
|
|
#include "tftp.h"
|
|
|
|
#include "proto.h"
|
|
|
|
|
|
u_long work_area_org = RELOC;
|
|
u_long kernel_size;
|
|
u_short real_cs;
|
|
u_long howto = 0;
|
|
u_char vendor_area[64];
|
|
|
|
enum LoadErr {
|
|
load_success,
|
|
load_no_answer,
|
|
load_bad_format,
|
|
load_bad_size,
|
|
};
|
|
|
|
static inline enum LoadErr
|
|
LoadProgFromServer(ipaddr_t server, ipaddr_t gateway, char *file_name) {
|
|
/* TBD - fail (or at least warn) if we don't get the entire file */
|
|
u_long start_addr;
|
|
u_long boot_area_org;
|
|
u_long tmp_reloc_org;
|
|
u_long kern_copy_org;
|
|
u_long kern_copy_p;
|
|
struct exec head;
|
|
u_long boot_argv[4];
|
|
#if 1 /* ndef USE_BUFFER */
|
|
u_char tmpbuf[4096]; /* we need to load the first 4k here */
|
|
#endif
|
|
|
|
SetTftpParms(server, gateway, file_name);
|
|
|
|
/* TBD - heuristics about what we are loading - load linux, ... also */
|
|
|
|
if (Read(&head, sizeof(head)) != sizeof(head))
|
|
return load_bad_size;
|
|
|
|
if (N_GETMAGIC(head) != ZMAGIC) {
|
|
printf("Invalid format!\n");
|
|
return load_bad_format;
|
|
}
|
|
|
|
/* Load/tftp the executable to a temporary area beyond 640k - after
|
|
successful load, copy to correct area. If load fails or is interrrupted,
|
|
we can recover gracefully
|
|
*/
|
|
|
|
start_addr = (u_long)head.a_entry;
|
|
boot_area_org = start_addr & 0x00f00000; /* some MEG boundary */
|
|
tmp_reloc_org = 0x00100000;
|
|
#ifdef USE_BUFFER
|
|
kern_copy_org = tmp_reloc_org + WORK_AREA_SIZE; /* leave free for relocation */
|
|
#else
|
|
kern_copy_org = boot_area_org; /* leave free for relocation */
|
|
#endif
|
|
kern_copy_p = kern_copy_org;
|
|
kernel_size = head.a_text + head.a_data + head.a_bss;
|
|
|
|
printf("Loading ");
|
|
IpPrintAddr(server);
|
|
printf(":%s @ 0x%x\n", file_name, boot_area_org);
|
|
#ifndef USE_BUFFER
|
|
if(boot_area_org < work_area_org) {
|
|
if((boot_area_org + head.a_text + head.a_data) > work_area_org) {
|
|
printf("kernel will not fit below loader\n");
|
|
return load_bad_size;
|
|
}
|
|
if((boot_area_org + head.a_text + head.a_data + head.a_bss) > 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 load_bad_size;
|
|
}
|
|
if(boot_area_org + kernel_size > work_area_org) {
|
|
printf("loader overlaps bss, kernel must bzero\n");
|
|
}
|
|
}
|
|
#else
|
|
if(boot_area_org + kernel_size > 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 load_bad_size;
|
|
}
|
|
/* check if too large for tmp buffer (TBD) */
|
|
#endif
|
|
printf("text=0x%x", head.a_text);
|
|
|
|
#if 01
|
|
/* skip to first 4k boundry */
|
|
Read(tmpbuf, 4096-sizeof(head));
|
|
#endif
|
|
|
|
#if 0 /* ndef USE_BUFFER */
|
|
/********************************************************/
|
|
/* LOAD THE TEXT SEGMENT */
|
|
/* don't clobber the first 4k yet (BIOS NEEDS IT) */
|
|
/********************************************************/
|
|
Read(tmpbuf, sizeof(tmpbuf));
|
|
kern_copy_p += sizeof(tmpbuf);
|
|
PhysRead(kern_copy_p, head.a_text - sizeof(tmpbuf));
|
|
kern_copy_p += head.a_text - sizeof(tmpbuf);
|
|
#else
|
|
/********************************************************/
|
|
/* LOAD THE TEXT SEGMENT */
|
|
/********************************************************/
|
|
PhysRead(kern_copy_p, head.a_text);
|
|
kern_copy_p += head.a_text;
|
|
#endif
|
|
|
|
/********************************************************/
|
|
/* Load the Initialised data after the text */
|
|
/********************************************************/
|
|
/* TBD - this is bogus - file system oriented */
|
|
#define CLSIZE 1
|
|
#define NBPG 4096 /* bytes/page */
|
|
#define CLOFSET (CLSIZE*NBPG-1) /* for clusters, like PGOFSET */
|
|
|
|
while (kern_copy_p & CLOFSET)
|
|
*(char *)kern_copy_p++ = 0;
|
|
|
|
printf(" data=0x%x", head.a_data);
|
|
PhysRead(kern_copy_p, head.a_data);
|
|
kern_copy_p += head.a_data;
|
|
|
|
/********************************************************/
|
|
/* Skip over the uninitialised data */
|
|
/* (but clear it) */
|
|
/********************************************************/
|
|
printf(" bss=0x%x", head.a_bss);
|
|
if (kern_copy_p < RELOC &&
|
|
(kern_copy_p + head.a_bss) > RELOC) {
|
|
PhysBzero(kern_copy_p, RELOC-(u_int)kern_copy_p);
|
|
} else {
|
|
PhysBzero(kern_copy_p, head.a_bss);
|
|
}
|
|
|
|
#ifdef LOADSYMS /* not yet, haven't worked this out yet */
|
|
if (kern_copy_p > 0x100000) {
|
|
/********************************************************/
|
|
/*copy in the symbol header */
|
|
/********************************************************/
|
|
PhysBcopy(&head.a_syms, kern_copy_p, sizeof(head.a_syms));
|
|
kern_copy_p += sizeof(head.a_syms);
|
|
|
|
/********************************************************/
|
|
/* READ in the symbol table */
|
|
/********************************************************/
|
|
printf(" symbols=[+0x%x", head.a_syms);
|
|
Read(kern_copy_p, head.a_syms);
|
|
kern_copy_p += head.a_syms;
|
|
|
|
/********************************************************/
|
|
/* Followed by the next integer (another header) */
|
|
/* more debug symbols? */
|
|
/********************************************************/
|
|
read(&i, sizeof(u_int));
|
|
PhysBcopy(&i, kern_copy_p, sizeof(u_int));
|
|
i -= sizeof(u_int);
|
|
kern_copy_p += sizeof(u_int);
|
|
|
|
/********************************************************/
|
|
/* and that many bytes of (debug symbols?) */
|
|
/********************************************************/
|
|
printf("+0x%x]", i);
|
|
Read(kern_copy_p, i);
|
|
kern_copy_p += i;
|
|
}
|
|
#endif LOADSYMS
|
|
|
|
/********************************************************/
|
|
/* and note the end address of all this */
|
|
/********************************************************/
|
|
|
|
printf(" total=0x%x",kern_copy_p - kern_copy_org);
|
|
|
|
boot_argv[0] = 0;
|
|
boot_argv[1] = howto;
|
|
boot_argv[2] = 0;
|
|
boot_argv[3] = 0;
|
|
|
|
/* TBD - place vendor_area on stack */
|
|
|
|
printf(" entry point=0x%x\n" ,((u_int)start_addr) & 0xffffff);
|
|
|
|
if (howto) {
|
|
static char *rb_option_name[9] = {
|
|
"askname",
|
|
"single",
|
|
"nosync",
|
|
"halt",
|
|
"initname",
|
|
"dfltroot",
|
|
"kdb",
|
|
"rdonly",
|
|
"dump",
|
|
};
|
|
int i;
|
|
printf("Starting kernel with options (0x%x): ", howto);
|
|
for (i=0; i<9; i++) {
|
|
if (howto & (1<<i)) {
|
|
printf("%s ", rb_option_name[i]);
|
|
}
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
#if 0 /* ndef USE_BUFFER */
|
|
PhysBcopy(tmpbuf, boot_area_org, sizeof(tmpbuf));
|
|
#endif
|
|
|
|
StartProg(start_addr & 0xffffff, boot_argv);
|
|
|
|
return load_success; /* hah! */
|
|
}
|
|
|
|
int GetHex(int old) {
|
|
int r, c, ch;
|
|
r = 0;
|
|
ch = 0;
|
|
while((c=getchar()) != '\n') {
|
|
ch = 1;
|
|
if (c>='0' && c<='9')
|
|
r = r*16 + (c-'0');
|
|
else if (c>='a' && c<='f')
|
|
r = r*16 + (c+10-'a');
|
|
}
|
|
if (ch)
|
|
return r;
|
|
else
|
|
return old;
|
|
}
|
|
|
|
static char
|
|
ToHex(int n) {
|
|
n &= 0x0F;
|
|
return n >= 10 ? n - 10 + 'A' : n + '0';
|
|
}
|
|
|
|
static char name_set[][9] = {
|
|
"xxxxxxxx",
|
|
"default",
|
|
};
|
|
|
|
static char *ext_set[] = {
|
|
".netbsd",
|
|
".netbsd.old",
|
|
".386bsd",
|
|
".386bsd.old",
|
|
".vmunix",
|
|
".vmunix.old",
|
|
};
|
|
|
|
static ipaddr_t server_set[2] = {
|
|
0,
|
|
IP_BCASTADDR,
|
|
};
|
|
|
|
static inline void
|
|
TryToLoadSomething(void) {
|
|
int nserver;
|
|
for (nserver=0; nserver<nelt(server_set); nserver++) {
|
|
int nname;
|
|
char file_name[MAX_FILE_NAME_LEN+1];
|
|
file_name[0] = '\0';
|
|
if (GetIpAddress(&server_set[nserver], &ip_myaddr, &ip_gateway, file_name)) {
|
|
if (*file_name) {
|
|
LoadProgFromServer(server_set[nserver], ip_gateway, file_name);
|
|
}
|
|
else {
|
|
/* no file name supplied from server, synthesize one */
|
|
inetaddr_t ip;
|
|
ip.a = ip_myaddr;
|
|
name_set[0][0] = ToHex(ip.s.a0 >> 4);
|
|
name_set[0][1] = ToHex(ip.s.a0);
|
|
name_set[0][2] = ToHex(ip.s.a1 >> 4);
|
|
name_set[0][3] = ToHex(ip.s.a1);
|
|
name_set[0][4] = ToHex(ip.s.a2 >> 4);
|
|
name_set[0][5] = ToHex(ip.s.a2);
|
|
name_set[0][6] = ToHex(ip.s.a3 >> 4);
|
|
name_set[0][7] = ToHex(ip.s.a3);
|
|
name_set[0][8] = 0;
|
|
for (nname=0; nname<nelt(name_set); nname++) {
|
|
int next;
|
|
for (next=0; next<nelt(ext_set); next++) {
|
|
strncpy(file_name, name_set[nname], MAX_FILE_NAME_LEN);
|
|
strncat(file_name, ext_set[next], MAX_FILE_NAME_LEN-strlen(file_name));
|
|
LoadProgFromServer(server_set[nserver], ip_gateway, file_name);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static char *
|
|
DecimalToByte(char *s, u_char *n) {
|
|
for (*n = 0; *s >= '0' && *s <= '9'; s++)
|
|
*n = (*n * 10) + *s - '0';
|
|
return s;
|
|
}
|
|
|
|
static ipaddr_t
|
|
IpConvertAddr(char *p) {
|
|
inetaddr_t addr;
|
|
|
|
if (p == (char *)0 || *p == '\0')
|
|
return IP_ANYADDR;
|
|
p = DecimalToByte(p, &addr.s.a0);
|
|
if (*p == '\0' || *p++ != '.')
|
|
return IP_ANYADDR;
|
|
p = DecimalToByte(p, &addr.s.a1);
|
|
if (*p == '\0' || *p++ != '.')
|
|
return IP_ANYADDR;
|
|
p = DecimalToByte(p, &addr.s.a2);
|
|
if (*p == '\0' || *p++ != '.')
|
|
return IP_ANYADDR;
|
|
p = DecimalToByte(p, &addr.s.a3);
|
|
if (*p != '\0')
|
|
return IP_ANYADDR;
|
|
return addr.a;
|
|
}
|
|
|
|
static int
|
|
GetLine(char **argv, int argvsize) {
|
|
char *p, ch;
|
|
static char line[128];
|
|
int argc;
|
|
|
|
/*
|
|
* Read command line, implement some simple editing features
|
|
*/
|
|
p = line;
|
|
while ((ch = getchar()) != '\r' && ch != '\n' && (p-line) < sizeof(line)) {
|
|
if (ch == '\b') {
|
|
if (p > line) {
|
|
p--;
|
|
printf(" \b");
|
|
}
|
|
} else
|
|
*p++ = ch;
|
|
}
|
|
*p = '\0';
|
|
|
|
/*
|
|
* Break command line up into an argument vector
|
|
*/
|
|
argc = 0;
|
|
for (p = line; *p == ' ' || *p == '\t'; p++)
|
|
/* skip white spaces */;
|
|
while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0') {
|
|
if (argc > argvsize) break;
|
|
argv[(argc)++] = p;
|
|
for (; *p != ' ' && *p != '\t' && *p != '\n' && *p != '\0'; p++)
|
|
/* skip word */;
|
|
if (*p != '\0') *p++ ='\0';
|
|
for (; *p == ' ' || *p == '\t'; p++)
|
|
/* skip white spaces */;
|
|
}
|
|
argv[(argc)] = (char *)0;
|
|
return argc;
|
|
}
|
|
|
|
enum cmd_token_type {
|
|
CMD_GO,
|
|
CMD_HELP,
|
|
CMD_RESET,
|
|
CMD_AUTO,
|
|
CMD_WHO,
|
|
CMD_REBOOT,
|
|
CMD_DISKBOOT,
|
|
CMD_ADDRESS,
|
|
CMD_GATEWAY,
|
|
CMD_TFTP,
|
|
CMD_DEBUG,
|
|
CMD_SINGLE,
|
|
CMD_FILE,
|
|
CMD_SERVER,
|
|
};
|
|
|
|
struct commands {
|
|
enum cmd_token_type cmd_token;
|
|
char *cmd_name;
|
|
char *cmd_help;
|
|
} commands[] = {
|
|
{CMD_GO, "go", " start loaded binary"},
|
|
{CMD_HELP, "help", " this help message"},
|
|
{CMD_RESET, "reset", " reset ethernet board"},
|
|
{CMD_AUTO, "auto", " continue with auto boot"},
|
|
{CMD_WHO, "whoami", " get IP address"},
|
|
{CMD_REBOOT, "reboot", " hard reboot"},
|
|
{CMD_DISKBOOT, "diskboot", " soft reboot (from disk)"},
|
|
{CMD_ADDRESS, "address", "[<addr>] set IP address"},
|
|
{CMD_GATEWAY, "gateway", "[<addr>] set IP gateway"},
|
|
{CMD_SERVER, "server", "[<addr>] set server IP address"},
|
|
{CMD_FILE, "file", "[<name>] set boot file name"},
|
|
{CMD_TFTP, "tftp", " TFTP download"},
|
|
{CMD_DEBUG, "debug", " enter kernel debugger at boot"},
|
|
{CMD_SINGLE, "single", " enter single user at boot"},
|
|
};
|
|
|
|
#define ARGVECSIZE 100
|
|
|
|
/*
|
|
* A very simple and terse monitor
|
|
*/
|
|
static void
|
|
Monitor(void) {
|
|
char *argv[ARGVECSIZE];
|
|
static char file_name[MAX_FILE_NAME_LEN+1] = "default.bsd386";
|
|
int loaded, argc;
|
|
int i;
|
|
int token;
|
|
static ipaddr_t ip_servaddr = IP_ANYADDR;
|
|
|
|
loaded = 0;
|
|
printf("\n"
|
|
#ifdef USE_BOOTP
|
|
"BOOTP/"
|
|
#endif
|
|
#ifdef USE_RARP
|
|
"RARP/"
|
|
#endif
|
|
"TFTP monitor mode\n");
|
|
for (;;) {
|
|
char filename[MAX_FILE_NAME_LEN+1];
|
|
ipaddr_t gateway;
|
|
printf("ethernet boot monitor: ");
|
|
if ((argc = GetLine(argv, ARGVECSIZE)) > 0) {
|
|
|
|
for (token = -1, i = 0; i < nelt(commands); i++) {
|
|
if (strcmp(argv[0], commands[i].cmd_name) == 0) {
|
|
token = commands[i].cmd_token;
|
|
break;
|
|
}
|
|
}
|
|
switch (token) {
|
|
case CMD_HELP:
|
|
for (i = 0; i < nelt(commands); i++)
|
|
printf("%s %s\n", commands[i].cmd_name, commands[i].cmd_help);
|
|
break;
|
|
case CMD_RESET:
|
|
PktInit();
|
|
EtherReset();
|
|
break;
|
|
case CMD_REBOOT:
|
|
EtherStop();
|
|
ResetCpu();
|
|
break;
|
|
case CMD_DISKBOOT:
|
|
EtherStop();
|
|
exit(0);
|
|
break;
|
|
case CMD_AUTO:
|
|
return;
|
|
case CMD_WHO:
|
|
(void) GetIpAddress(&ip_servaddr, &ip_myaddr, &gateway, filename);
|
|
break;
|
|
case CMD_ADDRESS:
|
|
if (argc != 2) {
|
|
printf("My IP address is ");
|
|
IpPrintAddr(ip_myaddr);
|
|
printf("\n");
|
|
} else
|
|
ip_myaddr = IpConvertAddr(argv[1]);
|
|
break;
|
|
case CMD_SERVER:
|
|
if (argc != 2) {
|
|
printf("Server's IP address is ");
|
|
IpPrintAddr(ip_servaddr);
|
|
printf("\n");
|
|
} else
|
|
ip_servaddr = IpConvertAddr(argv[1]);
|
|
break;
|
|
case CMD_FILE:
|
|
if (argc != 2) {
|
|
printf("File name is \"%s\"\n", file_name);
|
|
} else
|
|
strncpy(file_name, argv[1], MAX_FILE_NAME_LEN);
|
|
break;
|
|
case CMD_GATEWAY:
|
|
if (argc != 2) {
|
|
printf("Gateway IP address is ");
|
|
IpPrintAddr(ip_gateway);
|
|
printf("\n");
|
|
} else
|
|
ip_gateway = IpConvertAddr(argv[1]);
|
|
break;
|
|
case CMD_DEBUG:
|
|
howto ^= RB_KDB;
|
|
break;
|
|
case CMD_SINGLE:
|
|
howto ^= RB_SINGLE;
|
|
break;
|
|
case CMD_TFTP:
|
|
if (ip_myaddr == IP_ANYADDR) {
|
|
printf("This machine's IP address must be set first.\n");
|
|
goto complain;
|
|
}
|
|
loaded = LoadProgFromServer(ip_servaddr, ip_gateway, file_name);
|
|
printf("File could not be loaded, giving up.\n");
|
|
break;
|
|
default:
|
|
goto complain;
|
|
}
|
|
} else
|
|
complain:
|
|
printf("Invalid or incorrect command. Type \"help\" for help.\n");
|
|
}
|
|
}
|
|
|
|
static jmp_buf jmp_env;
|
|
|
|
void
|
|
HandleKbdAttn(void) {
|
|
if (IsKbdCharReady())
|
|
if (getc() == 0x1b) {
|
|
EtherReset();
|
|
PktInit();
|
|
longjmp(jmp_env, 1);
|
|
}
|
|
}
|
|
|
|
int time_zero;
|
|
|
|
void
|
|
main(void) {
|
|
|
|
extern char edata[], end[];
|
|
char volatile * volatile p;
|
|
|
|
/* clear bss */
|
|
for (p = edata; p < end; p++)
|
|
*p = 0;
|
|
|
|
printf(
|
|
#ifdef USE_BOOTP
|
|
"BOOTP/"
|
|
#endif
|
|
#ifdef USE_RARP
|
|
"RARP/"
|
|
#endif
|
|
"TFTP bootstrap loader @0x%x: %d/%d k of memory. ^] for attn.\n",
|
|
work_area_org,
|
|
GetMemSize(0),
|
|
GetMemSize(1));
|
|
|
|
gateA20();
|
|
|
|
PktInit();
|
|
if (!EtherInit()) {
|
|
printf("No ethernet board found\n");
|
|
exit(1);
|
|
}
|
|
srand((time_zero=timer()) ^ eth_myaddr[5]);
|
|
|
|
printf("Ethernet address is ");
|
|
EtherPrintAddr(eth_myaddr);
|
|
printf("\n");
|
|
|
|
for (;;) {
|
|
if (setjmp(jmp_env))
|
|
Monitor();
|
|
else {
|
|
TryToLoadSomething();
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef __GNUC__
|
|
void
|
|
__main(void) {
|
|
}
|
|
#endif
|