/* * 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 * $Id: io.c,v 1.13 1997/12/05 11:50:42 kato Exp $ */ #include "boot.h" #include #include #ifdef PC98 #include #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 = (int *)&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 adress 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 bcopy(const void *from, void *to, size_t len) { char *fp = (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++) { bcopy((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; }