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Big code refactor, get rid of HAL entirely

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This commit is contained in:
Kamil Kowalczyk
2025-11-11 21:26:27 +01:00
parent 7015bc9576
commit 566b35f4d5
84 changed files with 477 additions and 520 deletions
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39
kernel/intr/pit.c Normal file
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#include <stdint.h>
#include "intr/pit.h"
#include "io/io.h"
#define PIT_COUNTER0 0x40
#define PIT_CMD 0x43
#define PIT_CMD_BINARY 0x00
#define PIT_CMD_BCD 0x01
#define PIT_CMD_MODE0 0x00
#define PIT_CMD_MODE1 0x02
#define PIT_CMD_MODE2 0x04
#define PIT_CMD_MODE3 0x06
#define PIT_CMD_MODE4 0x08
#define PIT_CMD_MODE5 0x0A
#define PIT_CMD_LATCH 0x00
#define PIT_CMD_RW_LOW 0x10
#define PIT_CMD_RW_HI 0x20
#define PIT_CMD_RW_BOTH 0x30
#define PIT_CMD_COUNTER0 0x00
#define PIT_CMD_COUNTER1 0x40
#define PIT_CMD_COUNTER2 0x80
#define PIT_CMD_READBACK 0xC0
#define PIT_FREQ 1193182
volatile uint32_t PIT_TICKS;
void intr_pit_init(void) {
uint32_t hz = 1000;
uint32_t div = PIT_FREQ / hz;
io_out8(PIT_CMD, PIT_CMD_BINARY | PIT_CMD_MODE3 | PIT_CMD_RW_BOTH | PIT_CMD_COUNTER0);
io_out8(PIT_COUNTER0, div & 0xFF);
io_out8(PIT_COUNTER0, div >> 8);
}
void intr_pit_wait(uint32_t ms) {
uint32_t now = PIT_TICKS;
while (PIT_TICKS - now < ms);
}