commit 7fe04c614ad59d6cfb16efa1ede4228ce5bdca92
parent 50d022beb7584de8b42c5802c06b23dcb9c9363a
Author: erai <erai@omiltem.net>
Date: Mon, 3 Jun 2024 00:40:28 -0400
remove serial io
Diffstat:
| M | kernel.c | | | 70 | +++------------------------------------------------------------------- |
1 file changed, 3 insertions(+), 67 deletions(-)
diff --git a/kernel.c b/kernel.c
@@ -89,79 +89,12 @@ _w32(p: *byte, x: int): int;
_r16(p: *byte): int;
_w16(p: *byte, x: int): int;
-// FIXME a very dumb and lossy but simple serial debug
-
enum {
- IO_COM0 = 0x3f8,
IO_PIC1 = 0x20,
IO_PIC2 = 0xa0,
IO_PIT = 0x40,
}
-setup_serial() {
- outb(IO_COM0 + 1, 0x00);
- outb(IO_COM0 + 3, 0x80);
- outb(IO_COM0 + 0, 0x03);
- outb(IO_COM0 + 1, 0x00);
- outb(IO_COM0 + 3, 0x03);
- outb(IO_COM0 + 2, 0xc7);
- outb(IO_COM0 + 4, 0x0f);
-
- outb(IO_COM0, 0x1b);
- outb(IO_COM0, '[');
- outb(IO_COM0, 'H');
-
- outb(IO_COM0, 0x1b);
- outb(IO_COM0, '[');
- outb(IO_COM0, 'J');
-}
-
-sputc(c: int) {
- outb(IO_COM0, c);
-}
-
-sputs(s: *byte) {
- var i: int;
- i = 0;
- loop {
- if !s[i] {
- break;
- }
- sputc(s[i]:int);
- i = i + 1;
- }
-}
-
-sputd(x: int) {
- var d: int;
- if x < 0 {
- d = -(x % -10);
- x = x / -10;
- sputc('-');
- if x {
- sputd(x);
- }
- sputc('0' + d);
- } else {
- d = x % 10;
- x = x / 10;
- if x {
- sputd(x);
- }
- sputc('0' + d);
- }
-}
-
-sputh(x: int) {
- var d: int;
- d = x & 15;
- x = x >> 4;
- if x {
- sputh(x);
- }
- sputc("0123456789abcdef"[d]:int);
-}
-
gdt_tss(s: *int, base: int, size: int, access: int, flags: int) {
s[0] = (((base & ~0xffff) << 32)
+ ((flags & 0xf) << 52)
@@ -4866,6 +4799,9 @@ vexec(prog: *byte, argv: **byte, envp: **byte): int {
}
task_init(t: *task) {
+ // open("/dev/null") => 0
+ // open("/dev/tty") => 1
+ // dup(1) => 2
if vexec("/init", 0:**byte, 0:**byte) != 0 {
kdie("failed to exec init");
}
