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/*
* FreeBSD kernel unpacker.
* 1993 by Serge Vakulenko
* modified for FreeBSD 2.1 by Gary Jennejohn - 12FEB95
*/
/*
* FreeBSD(98) port
* 1995 by KATO T. of Nagoya University
*/
#include <machine/cpufunc.h> /* for inb/outb */
#include <sys/reboot.h> /* for RB_SERIAL */
short *videomem;
int curs;
int cols;
int lines;
unsigned int port;
#ifdef PC98
unsigned char bios[0x200];
#else
unsigned char bios[0x100];
#endif
extern int end, edata;
void *storage;
void *inbuf;
void *outbuf;
void *window;
void decompress_kernel (void *dest);
int memcmp (const void *arg1, const void *arg2, unsigned len)
{
unsigned char *a = (unsigned char*) arg1;
unsigned char *b = (unsigned char*) arg2;
for (; len-- > 0; ++a, ++b)
if (*a < *b)
return (-1);
else if (*a > *b)
return (1);
return (0);
}
void *memcpy (void *to, const void *from, unsigned len)
{
char *f = (char*) from;
char *t = (char*) to;
while (len-- > 0)
*t++ = *f++;
return (to);
}
void serial_putchar (unsigned char c)
{
unsigned char stat;
if (c == '\n')
serial_putchar('\r');
#ifdef PC98
do {
stat = inb (COMCONSOLE+2);
} while (!(stat & 0x01));
#else
do {
stat = inb (COMCONSOLE+5);
} while (!(stat & 0x20));
#endif
outb (COMCONSOLE, c);
}
void putchar (unsigned char c)
{
switch (c) {
case '\n': curs = (curs + cols) / cols * cols; break;
#ifdef PC98
default: videomem[curs++] = (c == 0x5c ? 0xfc : c); break;
#else
default: videomem[curs++] = 0x0700 | c; break;
#endif
}
while (curs >= cols*lines) {
int col;
memcpy (videomem, videomem+cols, (lines-1) * cols * 2);
for (col = 0; col < cols; col++)
#ifdef PC98
videomem[(lines - 1) * cols + col] = 0x20;
#else
videomem[(lines - 1) * cols + col] = 0x720;
#endif
curs -= cols;
}
/* set cursor position */
#ifdef PC98
while ((inb(0x60) & 0x04) == 0) {}
outb(0x62, 0x49);
outb(0x60, (curs + 1) & 0xff);
outb(0x60, (curs + 1) >> 8);
#else
outb (port, 0x0e); outb (port+1, curs>>8);
outb (port, 0x0f); outb (port+1, curs);
#endif
}
int use_serial;
void putstr (char *s)
{
while (*s) {
if (use_serial)
serial_putchar (*s++);
else
putchar (*s++);
}
}
void error (char *s)
{
putstr ("\n\n");
putstr (s);
putstr ("\n\n -- System halted");
while (1); /* Halt */
}
void boot (int howto)
{
int l, c, *p;
#ifdef PC98
unsigned short gdc_curaddr;
int i;
#endif
/* clear bss */
for (p = &edata; p < &end; ++p)
*p = 0;
inbuf = (void *)0x20000;
outbuf = (void *)0x30000;
window = (void *)0x40000;
storage = (void *)0x50000;
if (!(use_serial = (howto & RB_SERIAL))) {
#ifdef PC98
videomem = (void*)0xa0000;
cols = 80;
lines = 25;
/* Is FIFO buffer empty ? */
while ((inb(0x60) & 0x04) == 0) {}
outb(0x62, 0xe0); /* CSRR command */
/* T-GDC busy ? */
while ((inb(0x60) & 0x01) == 0) {}
/* read cursor address */
gdc_curaddr = inb(0x62);
gdc_curaddr += (inb(0x62) << 8);
/* ignore rest of data */
for (i = 0; i < 3; i++) {
(void)inb(0x62);
}
l = gdc_curaddr / 80 + 1;
c = 0;
#else
/* Test for monochrome video adapter */
if ((*((unsigned char*) 0x410) & 0x30) == 0x30)
videomem = (void*) 0xb0000; /* monochrome */
else
videomem = (void*) 0xb8000; /* color */
port = *(unsigned short*) 0x463;
cols = *(unsigned short*) 0x44a;
lines = 1 + *(unsigned char*) 0x484;
c = *(unsigned char*) 0x450;
l = *(unsigned char*) 0x451;
#endif
if (lines < 25)
lines = 25;
curs = l*cols + c;
if (curs > lines*cols)
curs = (lines-1) * cols;
}
putstr ("Uncompressing kernel...");
decompress_kernel ((void*) KADDR);
putstr ("done\n");
putstr ("Booting the kernel\n");
}
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