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#include "u.h"
#include "lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
IOQ consiq;
IOQ consoq;
static int useuart;
int debug = 0;
void
kbdchar(int c)
{
c &= 0x7F;
if(c == 0x10)
warp86("\n^P\n", 0);
if(c == 0x12) /* control-r? */
debug = !debug;
consiq.putc(&consiq, c);
}
static int
consputc(void)
{
return consoq.getc(&consoq);
}
void
kbdinit(void)
{
i8042init();
qinit(&consiq);
}
void
consinit(char* name, char* speed)
{
int baud, port;
if(name == nil || cistrcmp(name, "cga") == 0)
return;
port = strtoul(name, 0, 0);
if(port < 0 || port > 1)
return;
if(speed == nil || (baud = strtoul(speed, 0, 0)) == 0)
baud = 9600;
qinit(&consoq);
uartspecial(port, kbdchar, consputc, baud);
useuart = 1;
uartputs(&consoq, "\n", 1);
}
void
consdrain(void)
{
if(useuart)
uartdrain();
}
void
consputs(char* s, int n)
{
cgascreenputs(s, n);
if(useuart)
uartputs(&consoq, s, n);
}
void
warp86(char* s, ulong)
{
if(s != nil)
print(s);
spllo();
consdrain();
i8042reset();
/*
* Often the BIOS hangs during restart if a conventional 8042
* warm-boot sequence is tried. The following is Intel specific and
* seems to perform a cold-boot, but at least it comes back.
* And sometimes there is no keyboard...
*
* The reset register (0xcf9) is usually in one of the bridge
* chips. The actual location and sequence could be extracted from
* ACPI but why bother, this is the end of the line anyway.
*/
print("Takes a licking and keeps on ticking...\n");
*(ushort*)KADDR(0x472) = 0x1234; /* BIOS warm-boot flag */
outb(0xcf9, 0x02);
outb(0xcf9, 0x06);
for(;;)
idle();
}
static int
getline(char *buf, int size, int timeout)
{
int c, i=0;
ulong start;
char echo;
for (;;) {
start = m->ticks;
do{
/* timeout seconds to first char */
if(timeout && ((m->ticks - start) > timeout*HZ))
return -2;
c = consiq.getc(&consiq);
}while(c == -1);
timeout = 0;
if(c == '\r')
c = '\n'; /* turn carriage return into newline */
if(c == '\177')
c = '\010'; /* turn delete into backspace */
if(c == '\025')
echo = '\n'; /* echo ^U as a newline */
else
echo = c;
consputs(&echo, 1);
if(c == '\010'){
if(i > 0)
i--; /* bs deletes last character */
continue;
}
/* a newline ends a line */
if (c == '\n')
break;
/* ^U wipes out the line */
if (c =='\025')
return -1;
if(i == size)
return size;
buf[i++] = c;
}
buf[i] = 0;
return i;
}
int
getstr(char *prompt, char *buf, int size, char *def, int timeout)
{
int len, isdefault;
char pbuf[PRINTSIZE];
buf[0] = 0;
isdefault = (def && *def);
if(isdefault == 0){
timeout = 0;
sprint(pbuf, "%s: ", prompt);
}
else if(timeout)
sprint(pbuf, "%s[default==%s (%ds timeout)]: ", prompt, def, timeout);
else
sprint(pbuf, "%s[default==%s]: ", prompt, def);
for (;;) {
print(pbuf);
consdrain();
len = getline(buf, size, timeout);
switch(len){
case 0:
/* RETURN */
if(isdefault)
break;
continue;
case -1:
/* ^U typed */
continue;
case -2:
/* timeout, use default */
consputs("\n", 1);
len = 0;
break;
default:
break;
}
if(len >= size){
print("line too long\n");
continue;
}
break;
}
if(len == 0 && isdefault)
strncpy(buf, def, size);
return 0;
}
int
print(char *fmt, ...)
{
int n;
va_list arg;
char buf[PRINTSIZE];
va_start(arg, fmt);
n = vseprint(buf, buf+sizeof(buf), fmt, arg) - buf;
va_end(arg);
consputs(buf, n);
return n;
}
void
panic(char *fmt, ...)
{
int n;
va_list arg;
char buf[PRINTSIZE];
strcpy(buf, "panic: ");
va_start(arg, fmt);
n = vseprint(buf+7, buf+sizeof(buf), fmt, arg) - buf;
va_end(arg);
buf[n] = '\n';
consputs(buf, n+1);
//floppymemwrite();
//splhi(); for(;;);
if(etherdetach)
etherdetach();
if(sddetach)
sddetach();
consputs("\nPress almost any key to reset...", 32);
spllo();
while(consiq.getc(&consiq) == -1)
;
warp86(nil, 0);
}
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