f70172129c
if no lapic available, use 8253pit for clock now xv6 runs both on qemu (uniprocessor) and bochs (uniprocessor and MP)
417 lines
8.3 KiB
C
417 lines
8.3 KiB
C
#include "types.h"
|
|
#include "x86.h"
|
|
#include "traps.h"
|
|
#include "defs.h"
|
|
#include "spinlock.h"
|
|
#include "dev.h"
|
|
#include "param.h"
|
|
|
|
struct spinlock console_lock;
|
|
int panicked = 0;
|
|
int use_console_lock = 0;
|
|
|
|
// Copy console output to parallel port, which you can tell
|
|
// .bochsrc to copy to the stdout:
|
|
// parport1: enabled=1, file="/dev/stdout"
|
|
static void
|
|
lpt_putc(int c)
|
|
{
|
|
int i;
|
|
|
|
for(i = 0; !(inb(0x378+1) & 0x80) && i < 12800; i++)
|
|
;
|
|
outb(0x378+0, c);
|
|
outb(0x378+2, 0x08|0x04|0x01);
|
|
outb(0x378+2, 0x08);
|
|
}
|
|
|
|
static void
|
|
cons_putc(int c)
|
|
{
|
|
int crtport = 0x3d4; // io port of CGA
|
|
ushort *crt = (ushort*) 0xB8000; // base of CGA memory
|
|
int ind;
|
|
|
|
if(panicked){
|
|
cli();
|
|
for(;;)
|
|
;
|
|
}
|
|
|
|
lpt_putc(c);
|
|
|
|
// cursor position, 16 bits, col + 80*row
|
|
outb(crtport, 14);
|
|
ind = inb(crtport + 1) << 8;
|
|
outb(crtport, 15);
|
|
ind |= inb(crtport + 1);
|
|
|
|
c &= 0xff;
|
|
|
|
if(c == '\n'){
|
|
ind -= (ind % 80);
|
|
ind += 80;
|
|
} else {
|
|
c |= 0x0700; // black on white
|
|
crt[ind] = c;
|
|
ind++;
|
|
}
|
|
|
|
if((ind / 80) >= 24){
|
|
// scroll up
|
|
memmove(crt, crt + 80, sizeof(crt[0]) * (23 * 80));
|
|
ind -= 80;
|
|
memset(crt + ind, 0, sizeof(crt[0]) * ((24 * 80) - ind));
|
|
}
|
|
|
|
outb(crtport, 14);
|
|
outb(crtport + 1, ind >> 8);
|
|
outb(crtport, 15);
|
|
outb(crtport + 1, ind);
|
|
}
|
|
|
|
void
|
|
printint(int xx, int base, int sgn)
|
|
{
|
|
char buf[16];
|
|
char digits[] = "0123456789ABCDEF";
|
|
int i = 0, neg = 0;
|
|
uint x;
|
|
|
|
if(sgn && xx < 0){
|
|
neg = 1;
|
|
x = 0 - xx;
|
|
} else {
|
|
x = xx;
|
|
}
|
|
|
|
do {
|
|
buf[i++] = digits[x % base];
|
|
} while((x /= base) != 0);
|
|
if(neg)
|
|
buf[i++] = '-';
|
|
|
|
while(--i >= 0)
|
|
cons_putc(buf[i]);
|
|
}
|
|
|
|
// Print to the console. only understands %d, %x, %p, %s.
|
|
void
|
|
cprintf(char *fmt, ...)
|
|
{
|
|
int i, state = 0, c, locking = 0;
|
|
uint *ap = (uint*)(void*)&fmt + 1;
|
|
|
|
if(use_console_lock){
|
|
locking = 1;
|
|
acquire(&console_lock);
|
|
}
|
|
|
|
for(i = 0; fmt[i]; i++){
|
|
c = fmt[i] & 0xff;
|
|
if(state == 0){
|
|
if(c == '%'){
|
|
state = '%';
|
|
} else {
|
|
cons_putc(c);
|
|
}
|
|
} else if(state == '%'){
|
|
if(c == 'd'){
|
|
printint(*ap, 10, 1);
|
|
ap++;
|
|
} else if(c == 'x' || c == 'p'){
|
|
printint(*ap, 16, 0);
|
|
ap++;
|
|
} else if(c == 's'){
|
|
char *s = (char*)*ap;
|
|
ap++;
|
|
if(s == 0){
|
|
cons_putc('0');
|
|
}else{
|
|
while(*s != 0){
|
|
cons_putc(*s);
|
|
s++;
|
|
}
|
|
}
|
|
} else if(c == '%'){
|
|
cons_putc(c);
|
|
} else {
|
|
// Unknown % sequence. Print it to draw attention.
|
|
cons_putc('%');
|
|
cons_putc(c);
|
|
}
|
|
state = 0;
|
|
}
|
|
}
|
|
|
|
if(locking)
|
|
release(&console_lock);
|
|
}
|
|
|
|
void
|
|
panic(char *s)
|
|
{
|
|
__asm __volatile("cli");
|
|
use_console_lock = 0;
|
|
cprintf("panic (%d): ", cpu());
|
|
cprintf(s, 0);
|
|
cprintf("\n", 0);
|
|
panicked = 1; // freeze other CPU
|
|
for(;;)
|
|
;
|
|
}
|
|
|
|
int
|
|
console_write(int minor, char *buf, int n)
|
|
{
|
|
int i;
|
|
|
|
acquire(&console_lock);
|
|
|
|
for(i = 0; i < n; i++) {
|
|
cons_putc(buf[i] & 0xff);
|
|
}
|
|
|
|
release(&console_lock);
|
|
|
|
return n;
|
|
}
|
|
|
|
|
|
#define KBSTATP 0x64 // kbd controller status port(I)
|
|
#define KBS_DIB 0x01 // kbd data in buffer
|
|
#define KBDATAP 0x60 // kbd data port(I)
|
|
|
|
#define NO 0
|
|
|
|
#define SHIFT (1<<0)
|
|
#define CTL (1<<1)
|
|
#define ALT (1<<2)
|
|
|
|
#define CAPSLOCK (1<<3)
|
|
#define NUMLOCK (1<<4)
|
|
#define SCROLLLOCK (1<<5)
|
|
|
|
#define E0ESC (1<<6)
|
|
|
|
// Special keycodes
|
|
#define KEY_HOME 0xE0
|
|
#define KEY_END 0xE1
|
|
#define KEY_UP 0xE2
|
|
#define KEY_DN 0xE3
|
|
#define KEY_LF 0xE4
|
|
#define KEY_RT 0xE5
|
|
#define KEY_PGUP 0xE6
|
|
#define KEY_PGDN 0xE7
|
|
#define KEY_INS 0xE8
|
|
#define KEY_DEL 0xE9
|
|
|
|
static uchar shiftcode[256] =
|
|
{
|
|
[0x1D] CTL,
|
|
[0x2A] SHIFT,
|
|
[0x36] SHIFT,
|
|
[0x38] ALT,
|
|
[0x9D] CTL,
|
|
[0xB8] ALT
|
|
};
|
|
|
|
static uchar togglecode[256] =
|
|
{
|
|
[0x3A] CAPSLOCK,
|
|
[0x45] NUMLOCK,
|
|
[0x46] SCROLLLOCK
|
|
};
|
|
|
|
static uchar normalmap[256] =
|
|
{
|
|
NO, 0x1B, '1', '2', '3', '4', '5', '6', // 0x00
|
|
'7', '8', '9', '0', '-', '=', '\b', '\t',
|
|
'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', // 0x10
|
|
'o', 'p', '[', ']', '\n', NO, 'a', 's',
|
|
'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', // 0x20
|
|
'\'', '`', NO, '\\', 'z', 'x', 'c', 'v',
|
|
'b', 'n', 'm', ',', '.', '/', NO, '*', // 0x30
|
|
NO, ' ', NO, NO, NO, NO, NO, NO,
|
|
NO, NO, NO, NO, NO, NO, NO, '7', // 0x40
|
|
'8', '9', '-', '4', '5', '6', '+', '1',
|
|
'2', '3', '0', '.', NO, NO, NO, NO, // 0x50
|
|
[0x97] KEY_HOME,
|
|
[0x9C] '\n', // KP_Enter
|
|
[0xB5] '/', // KP_Div
|
|
[0xC8] KEY_UP,
|
|
[0xC9] KEY_PGUP,
|
|
[0xCB] KEY_LF,
|
|
[0xCD] KEY_RT,
|
|
[0xCF] KEY_END,
|
|
[0xD0] KEY_DN,
|
|
[0xD1] KEY_PGDN,
|
|
[0xD2] KEY_INS,
|
|
[0xD3] KEY_DEL
|
|
};
|
|
|
|
static uchar shiftmap[256] =
|
|
{
|
|
NO, 033, '!', '@', '#', '$', '%', '^', // 0x00
|
|
'&', '*', '(', ')', '_', '+', '\b', '\t',
|
|
'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', // 0x10
|
|
'O', 'P', '{', '}', '\n', NO, 'A', 'S',
|
|
'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', // 0x20
|
|
'"', '~', NO, '|', 'Z', 'X', 'C', 'V',
|
|
'B', 'N', 'M', '<', '>', '?', NO, '*', // 0x30
|
|
NO, ' ', NO, NO, NO, NO, NO, NO,
|
|
NO, NO, NO, NO, NO, NO, NO, '7', // 0x40
|
|
'8', '9', '-', '4', '5', '6', '+', '1',
|
|
'2', '3', '0', '.', NO, NO, NO, NO, // 0x50
|
|
[0x97] KEY_HOME,
|
|
[0x9C] '\n', // KP_Enter
|
|
[0xB5] '/', // KP_Div
|
|
[0xC8] KEY_UP,
|
|
[0xC9] KEY_PGUP,
|
|
[0xCB] KEY_LF,
|
|
[0xCD] KEY_RT,
|
|
[0xCF] KEY_END,
|
|
[0xD0] KEY_DN,
|
|
[0xD1] KEY_PGDN,
|
|
[0xD2] KEY_INS,
|
|
[0xD3] KEY_DEL
|
|
};
|
|
|
|
#define C(x) (x - '@')
|
|
|
|
static uchar ctlmap[256] =
|
|
{
|
|
NO, NO, NO, NO, NO, NO, NO, NO,
|
|
NO, NO, NO, NO, NO, NO, NO, NO,
|
|
C('Q'), C('W'), C('E'), C('R'), C('T'), C('Y'), C('U'), C('I'),
|
|
C('O'), C('P'), NO, NO, '\r', NO, C('A'), C('S'),
|
|
C('D'), C('F'), C('G'), C('H'), C('J'), C('K'), C('L'), NO,
|
|
NO, NO, NO, C('\\'), C('Z'), C('X'), C('C'), C('V'),
|
|
C('B'), C('N'), C('M'), NO, NO, C('/'), NO, NO,
|
|
[0x97] KEY_HOME,
|
|
[0xB5] C('/'), // KP_Div
|
|
[0xC8] KEY_UP,
|
|
[0xC9] KEY_PGUP,
|
|
[0xCB] KEY_LF,
|
|
[0xCD] KEY_RT,
|
|
[0xCF] KEY_END,
|
|
[0xD0] KEY_DN,
|
|
[0xD1] KEY_PGDN,
|
|
[0xD2] KEY_INS,
|
|
[0xD3] KEY_DEL
|
|
};
|
|
|
|
static uchar *charcode[4] = {
|
|
normalmap,
|
|
shiftmap,
|
|
ctlmap,
|
|
ctlmap
|
|
};
|
|
|
|
#define KBD_BUF 64
|
|
char kbd_buf[KBD_BUF];
|
|
int kbd_r;
|
|
int kbd_w;
|
|
struct spinlock kbd_lock;
|
|
static uint shift;
|
|
|
|
void
|
|
kbd_intr()
|
|
{
|
|
uint st, data, c;
|
|
|
|
acquire(&kbd_lock);
|
|
|
|
st = inb(KBSTATP);
|
|
if((st & KBS_DIB) == 0){
|
|
release(&kbd_lock);
|
|
return;
|
|
}
|
|
data = inb(KBDATAP);
|
|
|
|
if(data == 0xE0) {
|
|
shift |= E0ESC;
|
|
release(&kbd_lock);
|
|
return;
|
|
} else if(data & 0x80) {
|
|
// Key released
|
|
data = (shift & E0ESC ? data : data & 0x7F);
|
|
shift &= ~(shiftcode[data] | E0ESC);
|
|
release(&kbd_lock);
|
|
return;
|
|
} else if(shift & E0ESC) {
|
|
// Last character was an E0 escape; or with 0x80
|
|
data |= 0x80;
|
|
shift &= ~E0ESC;
|
|
}
|
|
|
|
shift |= shiftcode[data];
|
|
shift ^= togglecode[data];
|
|
|
|
c = charcode[shift & (CTL | SHIFT)][data];
|
|
if(shift & CAPSLOCK) {
|
|
if('a' <= c && c <= 'z')
|
|
c += 'A' - 'a';
|
|
else if('A' <= c && c <= 'Z')
|
|
c += 'a' - 'A';
|
|
}
|
|
|
|
// xxx hack
|
|
if(c == 0x0) {
|
|
release(&kbd_lock);
|
|
return;
|
|
}
|
|
|
|
if(((kbd_w + 1) % KBD_BUF) != kbd_r){
|
|
kbd_buf[kbd_w++] = c;
|
|
if(kbd_w >= KBD_BUF)
|
|
kbd_w = 0;
|
|
wakeup(&kbd_r);
|
|
} else {
|
|
cprintf("kbd overflow\n");
|
|
}
|
|
|
|
release(&kbd_lock);
|
|
}
|
|
|
|
int
|
|
console_read(int minor, char *dst, int n)
|
|
{
|
|
uint target = n;
|
|
|
|
acquire(&kbd_lock);
|
|
|
|
while(kbd_w == kbd_r) {
|
|
sleep(&kbd_r, &kbd_lock);
|
|
}
|
|
|
|
while(n > 0 && kbd_w != kbd_r){
|
|
*dst = (kbd_buf[kbd_r]) & 0xff;
|
|
cons_putc(*dst & 0xff);
|
|
dst++;
|
|
--n;
|
|
kbd_r++;
|
|
if(kbd_r >= KBD_BUF)
|
|
kbd_r = 0;
|
|
}
|
|
|
|
release(&kbd_lock);
|
|
|
|
return target - n;
|
|
}
|
|
|
|
void
|
|
console_init()
|
|
{
|
|
initlock(&console_lock, "console");
|
|
initlock(&kbd_lock, "kbd");
|
|
|
|
devsw[CONSOLE].d_write = console_write;
|
|
devsw[CONSOLE].d_read = console_read;
|
|
|
|
irq_setmask_8259A(irq_mask_8259A & ~(1 << IRQ_KBD));
|
|
ioapic_enable(IRQ_KBD, 0);
|
|
|
|
use_console_lock = 1;
|
|
}
|