freebsd-dev/sys/boot/pc98/boot2/io.c
2004-07-30 09:42:04 +00:00

432 lines
8.2 KiB
C

/*
* 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.
*
* from: Mach, Revision 2.2 92/04/04 11:35:57 rpd
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "boot.h"
#include <machine/cpufunc.h>
#include <sys/reboot.h>
#ifdef PC98
#include <pc98/pc98/pc98.h>
#endif
static int getchar(int in_buf);
/*
* Gate A20 for high memory
*/
void
gateA20(void)
{
outb(0xf2, 0x00);
outb(0xf6, 0x02);
}
/* printf - only handles %d as decimal, %c as char, %s as string */
void
printf(const char *format, ...)
{
int *dataptr = (void *)&format;
char c;
dataptr++;
while ((c = *format++))
if (c != '%')
putchar(c);
else
switch (c = *format++) {
case 'd': {
int num = *dataptr++;
char buf[10], *ptr = buf;
if (num<0) {
num = -num;
putchar('-');
}
do
*ptr++ = '0'+num%10;
while (num /= 10);
do
putchar(*--ptr);
while (ptr != buf);
break;
}
case 'x': {
unsigned int num = *dataptr++, dig;
char buf[8], *ptr = buf;
do
*ptr++ = (dig=(num&0xf)) > 9?
'a' + dig - 10 :
'0' + dig;
while (num >>= 4);
do
putchar(*--ptr);
while (ptr != buf);
break;
}
case 'c': putchar((*dataptr++)&0xff); break;
case 's': {
char *ptr = (char *)*dataptr++;
while ((c = *ptr++))
putchar(c);
break;
}
}
}
void
putchar(int c)
{
if (c == '\n')
putchar('\r');
if (loadflags & RB_DUAL) {
putc(c);
serial_putc(c);
} else if (loadflags & RB_SERIAL)
serial_putc(c);
else
putc(c);
}
static int
getchar(int in_buf)
{
int c;
loop:
if (loadflags & RB_DUAL) {
if (ischar())
c = getc();
else if (serial_ischar())
c = serial_getc();
else
goto loop;
} else if (loadflags & RB_SERIAL)
c = serial_getc();
else
c = getc();
if (c == '\r')
c = '\n';
if (c == '\b') {
if (in_buf != 0) {
putchar('\b');
putchar(' ');
} else {
goto loop;
}
}
putchar(c);
return(c);
}
/*
* This routine uses an inb to an unused port, the time to execute that
* inb is approximately 1.25uS. This value is pretty constant across
* all CPU's and all buses, with the exception of some PCI implentations
* that do not forward this I/O address to the ISA bus as they know it
* is not a valid ISA bus address, those machines execute this inb in
* 60 nS :-(.
*
* XXX this should be converted to use bios_tick.
*/
void
delay1ms(void)
{
#ifdef PC98
int i = 800;
while (--i >= 0)
(void)outb(0x5f,0); /* about 600ns */
#else
int i = 800;
while (--i >= 0)
(void)inb(0x84);
#endif
}
static __inline int
isch(void)
{
int isc;
/*
* Checking the keyboard has the side effect of enabling clock
* interrupts so that bios_tick works. Check the keyboard to
* get this side effect even if we only want the serial status.
*/
isc = ischar();
if (loadflags & RB_DUAL) {
if (isc != 0)
return (isc);
} else if (!(loadflags & RB_SERIAL))
return (isc);
return (serial_ischar());
}
static __inline unsigned
pword(unsigned physaddr)
{
#ifdef PC98
static int counter = 0;
int i;
for (i = 0; i < 512; i++)
(void)outb(0x5f, 0);
return (counter++);
#else
unsigned result;
/*
* Give the fs prefix separately because gas omits it for
* "movl %fs:0x46c, %eax".
*/
__asm __volatile("fs; movl %1, %0" : "=r" (result)
: "m" (*(unsigned *)physaddr));
return (result);
#endif
}
int
gets(char *buf)
{
#define bios_tick pword(0x46c)
#ifdef PC98
#define BIOS_TICK_MS 1
#else
#define BIOS_TICK_MS 55
#endif
unsigned initial_bios_tick;
char *ptr=buf;
#if BOOTWAIT
for (initial_bios_tick = bios_tick;
bios_tick - initial_bios_tick < BOOTWAIT / BIOS_TICK_MS;)
#endif
if (isch())
for (;;) {
switch(*ptr = getchar(ptr - buf) & 0xff) {
case '\n':
case '\r':
*ptr = '\0';
return 1;
case '\b':
if (ptr > buf) ptr--;
continue;
default:
ptr++;
}
#if TIMEOUT + 0
#if !BOOTWAIT
#error "TIMEOUT without BOOTWAIT"
#endif
for (initial_bios_tick = bios_tick;;) {
if (isch())
break;
if (bios_tick - initial_bios_tick >=
TIMEOUT / BIOS_TICK_MS)
return 0;
}
#endif
}
return 0;
}
int
strcmp(const char *s1, const char *s2)
{
while (*s1 == *s2) {
if (!*s1++)
return 0;
s2++;
}
return 1;
}
#ifdef CDBOOT
int
strcasecmp(const char *s1, const char *s2)
{
/*
* We only consider ASCII chars and don't anticipate
* control characters (they are invalid in filenames
* anyway).
*/
while ((*s1 & 0x5f) == (*s2 & 0x5f)) {
if (!*s1++)
return 0;
s2++;
}
return 1;
}
#endif /* !CDBOOT */
void
memcpy(const void *from, void *to, size_t len)
{
const char *fp = (const char *)from;
char *tp = (char *)to;
while (len-- > 0)
*tp++ = *fp++;
}
/* To quote Ken: "You are not expected to understand this." :) */
void
twiddle(void)
{
putchar((char)tw_chars);
tw_chars = (tw_chars >> 8) | ((tw_chars & (unsigned long)0xFF) << 24);
putchar('\b');
}
static unsigned short *Crtat = (unsigned short *)0;
static int row;
static int col;
void putc(int c)
{
static unsigned short *crtat;
unsigned char sys_type;
unsigned short *cp;
int i, pos;
if (Crtat == 0) {
sys_type = *(unsigned char *)V(0xA1501);
if (sys_type & 0x08) {
Crtat = (unsigned short *)V(0xE0000);
crtat = Crtat;
row = 31;
col = 80;
} else {
Crtat = (unsigned short *)V(0xA0000);
crtat = Crtat;
row = 25;
col = 80;
}
}
switch(c) {
case '\t':
do {
putc(' ');
} while ((int)crtat % 16);
break;
case '\b':
crtat--;
break;
case '\r':
crtat -= (crtat - Crtat) % col;
break;
case '\n':
crtat += col;
break;
default:
*crtat = (c == 0x5c ? 0xfc : c);
*(crtat++ + 0x1000) = 0xe1;
break;
}
if (crtat >= Crtat + col * row) {
cp = Crtat;
for (i = 1; i < row; i++) {
memcpy((void *)(cp+col), (void *)cp, col*2);
cp += col;
}
for (i = 0; i < col; i++) {
*cp++ = ' ';
}
crtat -= col;
}
pos = crtat - Crtat;
while((inb(0x60) & 0x04) == 0) {}
outb(0x62, 0x49);
outb(0x60, pos & 0xff);
outb(0x60, pos >> 8);
}
void machine_check(void)
{
int ret;
int i;
int data = 0;
u_char epson_machine_id = *(unsigned char *)V(0xA1624);
/* PC98_SYSTEM_PARAMETER(0x501) */
ret = ((*(unsigned char*)V(0xA1501)) & 0x08) >> 3;
/* Wait V-SYNC */
while (inb(0x60) & 0x20) {}
while (!(inb(0x60) & 0x20)) {}
/* ANK 'A' font */
outb(0xa1, 0x00);
outb(0xa3, 0x41);
/* M_NORMAL, use CG window (all NEC OK) */
/* sum */
for (i = 0; i < 4; i++) {
data += *((unsigned long*)V(0xA4000) + i);/* 0xa4000 */
}
if (data == 0x6efc58fc) { /* DA data */
ret |= M_NEC_PC98;
} else {
ret |= M_EPSON_PC98;
}
ret |= (inb(0x42) & 0x20) ? M_8M : 0;
/* PC98_SYSTEM_PARAMETER(0x400) */
if ((*(unsigned char*)V(0xA1400)) & 0x80) {
ret |= M_NOTE;
}
if (ret & M_NEC_PC98) {
/* PC98_SYSTEM_PARAMETER(0x458) */
if ((*(unsigned char*)V(0xA1458)) & 0x80) {
ret |= M_H98;
} else {
ret |= M_NOT_H98;
}
} else {
ret |= M_NOT_H98;
switch (epson_machine_id) {
case 0x20: /* note A */
case 0x22: /* note W */
case 0x27: /* note AE */
case 0x2a: /* note WR */
ret |= M_NOTE;
break;
default:
break;
}
}
(*(unsigned long *)V(0xA1620)) = ret;
}