freebsd-dev/sys/i386/boot/netboot/misc.c

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/**************************************************************************
MISC Support Routines
**************************************************************************/
#include "netboot.h"
#define NO_SWITCH /* saves space */
/**************************************************************************
TWIDDLE
**************************************************************************/
twiddle()
{
static int count=0;
char tiddles[]="-\\|/";
putchar(tiddles[(count++)&3]);
putchar('\b');
}
/**************************************************************************
BCOPY
**************************************************************************/
bcopy(s,d,n)
char *s, *d;
int n;
{
while ((n--) > 0) {
*(d++) = *(s++);
}
}
/**************************************************************************
BZERO
**************************************************************************/
bzero(d,n)
char *d;
int n;
{
while ((n--) > 0) {
*(d++) = 0;
}
}
/**************************************************************************
BCOMPARE
**************************************************************************/
bcompare(d,s,n)
char *d,*s;
int n;
{
while ((n--) > 0) {
if (*(d++) != *(s++)) return(0);
}
return(1);
}
/**************************************************************************
SUBSTR (slightly wacky but functional)
**************************************************************************/
char *substr(a,b)
char *a,*b;
{
char *loc1;
char *loc2;
while (*a != '\0') {
loc1 = a;
loc2 = b;
while (*loc1 == *loc2++) {
if (*loc1 == '\0') return (0);
loc1++;
if (*loc2 == '\0') return (loc1);
}
a++;
}
return (0);
}
/**************************************************************************
PRINTF and friends
Formats:
%X - 4 byte ASCII (8 hex digits)
%x - 2 byte ASCII (4 hex digits)
%b - 1 byte ASCII (2 hex digits)
%d - decimal
%c - ASCII char
%s - ASCII string
%I - Internet address in x.x.x.x notation
%L - Binary long
%S - String (multiple of 4 bytes) preceded with 4 byte
binary length
%M - Copy memory. Takes two args, len and ptr
**************************************************************************/
static char hex[]="0123456789ABCDEF";
char *do_printf(buf, fmt, dp)
char *buf, *fmt;
int *dp;
{
register char *p;
char tmp[16];
while (*fmt) {
if (*fmt == '%') { /* switch() uses more space */
fmt++;
if (*fmt == 'L') {
register int h = *(dp++);
*(buf++) = h>>24;
*(buf++) = h>>16;
*(buf++) = h>>8;
*(buf++) = h;
}
if (*fmt == 'S') {
register int len = 0;
char *lenptr = buf;
p = (char *)*dp++;
buf += 4;
while (*p) {
*(buf++) = *p++;
len ++;
}
*(lenptr++) = len>>24;
*(lenptr++) = len>>16;
*(lenptr++) = len>>8;
*lenptr = len;
while (len & 3) {
*(buf++) = 0;
len ++;
}
}
if (*fmt == 'M') {
register int len = *(dp++);
bcopy((char *)*dp++, buf, len);
buf += len;
}
if (*fmt == 'X') {
register int h = *(dp++);
*(buf++) = hex[(h>>28)& 0x0F];
*(buf++) = hex[(h>>24)& 0x0F];
*(buf++) = hex[(h>>20)& 0x0F];
*(buf++) = hex[(h>>16)& 0x0F];
*(buf++) = hex[(h>>12)& 0x0F];
*(buf++) = hex[(h>>8)& 0x0F];
*(buf++) = hex[(h>>4)& 0x0F];
*(buf++) = hex[h& 0x0F];
}
if (*fmt == 'x') {
register int h = *(dp++);
*(buf++) = hex[(h>>12)& 0x0F];
*(buf++) = hex[(h>>8)& 0x0F];
*(buf++) = hex[(h>>4)& 0x0F];
*(buf++) = hex[h& 0x0F];
}
if (*fmt == 'b') {
register int h = *(dp++);
*(buf++) = hex[(h>>4)& 0x0F];
*(buf++) = hex[h& 0x0F];
}
if (*fmt == 'd') {
register int dec = *(dp++);
p = tmp;
if (dec < 0) {
*(buf++) = '-';
dec = -dec;
}
do {
*(p++) = '0' + (dec%10);
dec = dec/10;
} while(dec);
while ((--p) >= tmp) *(buf++) = *p;
}
if (*fmt == 'I') {
buf = sprintf(buf,"%d.%d.%d.%d",
(*(dp)>>24) & 0x00FF,
(*(dp)>>16) & 0x00FF,
(*(dp)>>8) & 0x00FF,
*dp & 0x00FF);
dp++;
}
if (*fmt == 'c')
*(buf++) = *(dp++);
if (*fmt == 's') {
p = (char *)*dp++;
while (*p) *(buf++) = *p++;
}
} else *(buf++) = *fmt;
fmt++;
}
*buf = 0;
return(buf);
}
char *sprintf(buf, fmt, data)
char *fmt, *buf;
int data;
{
return(do_printf(buf,fmt, &data));
}
printf(fmt,data)
char *fmt;
int data;
{
char buf[80],*p;
p = buf;
do_printf(buf,fmt,&data);
while (*p) putchar(*p++);
}
/**************************************************************************
SETIP - Convert an ascii x.x.x.x to binary form
**************************************************************************/
setip(p, i)
char *p;
unsigned *i;
{
unsigned ip = 0;
int val;
if (((val = getdec(&p)) < 0) || (val > 255)) return(0);
if (*p != '.') return(0);
p++;
ip = val;
if (((val = getdec(&p)) < 0) || (val > 255)) return(0);
if (*p != '.') return(0);
p++;
ip = (ip << 8) | val;
if (((val = getdec(&p)) < 0) || (val > 255)) return(0);
if (*p != '.') return(0);
p++;
ip = (ip << 8) | val;
if (((val = getdec(&p)) < 0) || (val > 255)) return(0);
*i = (ip << 8) | val;
return(1);
}
getdec(ptr)
char **ptr;
{
char *p = *ptr;
int ret=0;
if ((*p < '0') || (*p > '9')) return(-1);
while ((*p >= '0') && (*p <= '9')) {
ret = ret*10 + (*p - '0');
p++;
}
*ptr = p;
return(ret);
}
#define K_RDWR 0x60 /* keyboard data & cmds (read/write) */
#define K_STATUS 0x64 /* keyboard status */
#define K_CMD 0x64 /* keybd ctlr command (write-only) */
#define K_OBUF_FUL 0x01 /* output buffer full */
#define K_IBUF_FUL 0x02 /* input buffer full */
#define KC_CMD_WIN 0xd0 /* read output port */
#define KC_CMD_WOUT 0xd1 /* write output port */
#define KB_A20 0x9f /* enable A20,
enable output buffer full interrupt
enable data line
disable clock line */
/*
* Gate A20 for high memory
*/
unsigned char x_20 = KB_A20;
gateA20()
{
#ifdef IBM_L40
outb(0x92, 0x2);
#else IBM_L40
while (inb(K_STATUS) & K_IBUF_FUL);
while (inb(K_STATUS) & K_OBUF_FUL)
(void)inb(K_RDWR);
outb(K_CMD, KC_CMD_WOUT);
while (inb(K_STATUS) & K_IBUF_FUL);
outb(K_RDWR, x_20);
while (inb(K_STATUS) & K_IBUF_FUL);
#endif IBM_L40
}