430 lines
8.2 KiB
C
430 lines
8.2 KiB
C
/*
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* Mach Operating System
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* Copyright (c) 1992, 1991 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*
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* from: Mach, Revision 2.2 92/04/04 11:35:57 rpd
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* $Id: io.c,v 1.12 1997/07/13 12:13:02 kato Exp $
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*/
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#include "boot.h"
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#include <machine/cpufunc.h>
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#include <sys/reboot.h>
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#ifdef PC98
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#include "../../pc98/pc98.h"
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#endif
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static int getchar(int in_buf);
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/*
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* Gate A20 for high memory
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*/
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void
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gateA20(void)
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{
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outb(0xf2, 0x00);
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outb(0xf6, 0x02);
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}
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/* printf - only handles %d as decimal, %c as char, %s as string */
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void
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printf(const char *format, ...)
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{
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int *dataptr = (int *)&format;
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char c;
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dataptr++;
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while ((c = *format++))
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if (c != '%')
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putchar(c);
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else
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switch (c = *format++) {
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case 'd': {
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int num = *dataptr++;
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char buf[10], *ptr = buf;
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if (num<0) {
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num = -num;
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putchar('-');
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}
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do
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*ptr++ = '0'+num%10;
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while (num /= 10);
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do
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putchar(*--ptr);
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while (ptr != buf);
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break;
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}
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case 'x': {
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unsigned int num = *dataptr++, dig;
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char buf[8], *ptr = buf;
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do
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*ptr++ = (dig=(num&0xf)) > 9?
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'a' + dig - 10 :
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'0' + dig;
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while (num >>= 4);
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do
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putchar(*--ptr);
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while (ptr != buf);
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break;
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}
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case 'c': putchar((*dataptr++)&0xff); break;
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case 's': {
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char *ptr = (char *)*dataptr++;
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while ((c = *ptr++))
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putchar(c);
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break;
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}
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}
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}
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void
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putchar(int c)
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{
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if (c == '\n')
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putchar('\r');
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if (loadflags & RB_DUAL) {
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putc(c);
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serial_putc(c);
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} else if (loadflags & RB_SERIAL)
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serial_putc(c);
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else
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putc(c);
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}
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static int
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getchar(int in_buf)
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{
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int c;
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loop:
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if (loadflags & RB_DUAL) {
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if (ischar())
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c = getc();
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else if (serial_ischar())
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c = serial_getc();
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else
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goto loop;
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} else if (loadflags & RB_SERIAL)
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c = serial_getc();
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else
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c = getc();
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if (c == '\r')
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c = '\n';
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if (c == '\b') {
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if (in_buf != 0) {
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putchar('\b');
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putchar(' ');
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} else {
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goto loop;
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}
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}
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putchar(c);
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return(c);
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}
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/*
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* This routine uses an inb to an unused port, the time to execute that
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* inb is approximately 1.25uS. This value is pretty constant across
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* all CPU's and all buses, with the exception of some PCI implentations
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* that do not forward this I/O adress to the ISA bus as they know it
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* is not a valid ISA bus address, those machines execute this inb in
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* 60 nS :-(.
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*
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* XXX this should be converted to use bios_tick.
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*/
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void
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delay1ms(void)
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{
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#ifdef PC98
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int i = 800;
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while (--i >= 0)
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(void)outb(0x5f,0); /* about 600ns */
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#else
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int i = 800;
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while (--i >= 0)
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(void)inb(0x84);
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#endif
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}
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static __inline int
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isch(void)
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{
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int isc;
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/*
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* Checking the keyboard has the side effect of enabling clock
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* interrupts so that bios_tick works. Check the keyboard to
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* get this side effect even if we only want the serial status.
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*/
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isc = ischar();
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if (loadflags & RB_DUAL) {
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if (isc != 0)
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return (isc);
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} else if (!(loadflags & RB_SERIAL))
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return (isc);
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return (serial_ischar());
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}
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static __inline unsigned
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pword(unsigned physaddr)
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{
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#ifdef PC98
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static int counter = 0;
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int i;
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for (i = 0; i < 512; i++)
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(void)outb(0x5f, 0);
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return (counter++);
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#else
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unsigned result;
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/*
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* Give the fs prefix separately because gas omits it for
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* "movl %fs:0x46c, %eax".
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*/
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__asm __volatile("fs; movl %1, %0" : "=r" (result)
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: "m" (*(unsigned *)physaddr));
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return (result);
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#endif
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}
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int
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gets(char *buf)
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{
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#define bios_tick pword(0x46c)
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#ifdef PC98
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#define BIOS_TICK_MS 1
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#else
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#define BIOS_TICK_MS 55
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#endif
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unsigned initial_bios_tick;
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char *ptr=buf;
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#if BOOTWAIT
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for (initial_bios_tick = bios_tick;
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bios_tick - initial_bios_tick < BOOTWAIT / BIOS_TICK_MS;)
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#endif
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if (isch())
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for (;;) {
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switch(*ptr = getchar(ptr - buf) & 0xff) {
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case '\n':
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case '\r':
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*ptr = '\0';
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return 1;
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case '\b':
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if (ptr > buf) ptr--;
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continue;
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default:
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ptr++;
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}
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#if TIMEOUT + 0
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#if !BOOTWAIT
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#error "TIMEOUT without BOOTWAIT"
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#endif
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for (initial_bios_tick = bios_tick;;) {
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if (isch())
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break;
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if (bios_tick - initial_bios_tick >=
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TIMEOUT / BIOS_TICK_MS)
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return 0;
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}
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#endif
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}
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return 0;
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}
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int
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strcmp(const char *s1, const char *s2)
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{
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while (*s1 == *s2) {
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if (!*s1++)
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return 0;
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s2++;
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}
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return 1;
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}
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#ifdef CDBOOT
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int
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strcasecmp(const char *s1, const char *s2)
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{
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/*
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* We only consider ASCII chars and don't anticipate
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* control characters (they are invalid in filenames
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* anyway).
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*/
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while ((*s1 & 0x5f) == (*s2 & 0x5f)) {
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if (!*s1++)
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return 0;
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s2++;
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}
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return 1;
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}
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#endif /* !CDBOOT */
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void
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bcopy(const void *from, void *to, size_t len)
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{
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char *fp = (char *)from;
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char *tp = (char *)to;
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while (len-- > 0)
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*tp++ = *fp++;
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}
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/* To quote Ken: "You are not expected to understand this." :) */
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void
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twiddle(void)
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{
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putchar((char)tw_chars);
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tw_chars = (tw_chars >> 8) | ((tw_chars & (unsigned long)0xFF) << 24);
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putchar('\b');
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}
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static unsigned short *Crtat = (unsigned short *)0;
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static int row;
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static int col;
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void putc(int c)
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{
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static unsigned short *crtat;
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unsigned char sys_type;
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unsigned short *cp;
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int i, pos;
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if (Crtat == 0) {
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sys_type = *(unsigned char *)V(0xA1501);
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if (sys_type & 0x08) {
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Crtat = (unsigned short *)V(0xE0000);
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crtat = Crtat;
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row = 31;
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col = 80;
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} else {
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Crtat = (unsigned short *)V(0xA0000);
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crtat = Crtat;
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row = 25;
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col = 80;
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}
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}
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switch(c) {
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case '\t':
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do {
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putc(' ');
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} while ((int)crtat % 16);
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break;
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case '\b':
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crtat--;
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break;
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case '\r':
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crtat -= (crtat - Crtat) % col;
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break;
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case '\n':
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crtat += col;
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break;
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default:
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*crtat = (c == 0x5c ? 0xfc : c);
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*(crtat++ + 0x1000) = 0xe1;
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break;
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}
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if (crtat >= Crtat + col * row) {
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cp = Crtat;
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for (i = 1; i < row; i++) {
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bcopy((void *)(cp+col), (void *)cp, col*2);
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cp += col;
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}
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for (i = 0; i < col; i++) {
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*cp++ = ' ';
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}
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crtat -= col;
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}
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pos = crtat - Crtat;
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while((inb(0x60) & 0x04) == 0) {}
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outb(0x62, 0x49);
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outb(0x60, pos & 0xff);
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outb(0x60, pos >> 8);
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}
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void machine_check(void)
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{
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int ret;
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int i;
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int data = 0;
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u_char epson_machine_id = *(unsigned char *)V(0xA1624);
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/* PC98_SYSTEM_PARAMETER(0x501) */
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ret = ((*(unsigned char*)V(0xA1501)) & 0x08) >> 3;
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/* Wait V-SYNC */
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while (inb(0x60) & 0x20) {}
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while (!(inb(0x60) & 0x20)) {}
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/* ANK 'A' font */
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outb(0xa1, 0x00);
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outb(0xa3, 0x41);
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/* M_NORMAL, use CG window (all NEC OK) */
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/* sum */
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for (i = 0; i < 4; i++) {
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data += *((unsigned long*)V(0xA4000) + i);/* 0xa4000 */
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}
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if (data == 0x6efc58fc) { /* DA data */
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ret |= M_NEC_PC98;
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} else {
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ret |= M_EPSON_PC98;
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}
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ret |= (inb(0x42) & 0x20) ? M_8M : 0;
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/* PC98_SYSTEM_PARAMETER(0x400) */
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if ((*(unsigned char*)V(0xA1400)) & 0x80) {
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ret |= M_NOTE;
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}
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if (ret & M_NEC_PC98) {
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/* PC98_SYSTEM_PARAMETER(0x458) */
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if ((*(unsigned char*)V(0xA1458)) & 0x80) {
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ret |= M_H98;
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} else {
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ret |= M_NOT_H98;
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}
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} else {
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ret |= M_NOT_H98;
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switch (epson_machine_id) {
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case 0x20: /* note A */
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case 0x22: /* note W */
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case 0x27: /* note AE */
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case 0x2a: /* note WR */
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ret |= M_NOTE;
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break;
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default:
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break;
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}
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}
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(*(unsigned long *)V(0xA1620)) = ret;
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}
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