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Espresso 0.0.2c

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This commit is contained in:
David Goeke
2026-03-20 16:57:08 -05:00
parent 021fdbbcef
commit 5971218b56
77 changed files with 4538 additions and 518 deletions
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22
drivers/pit.c
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@ -2,6 +2,8 @@
#include <port_io.h>
#include <stdio.h>
#include <scheduler.h>
#include <drivers/pit.h>
@ -14,12 +16,14 @@ volatile uint64_t pit_ticks = 0;
bool pit_initialized = false;
void pit_init(void)
{
{
printf("pit_initialized addr = %x\n", &pit_initialized);
#ifdef _DEBUG
printf("[ PIT ] Initializing the PIT...\n");
#endif
uint16_t divisor = (uint16_t)1193;
uint16_t divisor = (uint16_t) 1193;
/* Send command byte */
outb(PIT_COMMAND, 0x36); /* Channel 0, low/high byte, mode 3 (square wave), binary */
@ -35,9 +39,10 @@ void pit_init(void)
#endif
}
void pit_handler(void)
registers_t* pit_handler(registers_t* regs)
{
pit_ticks++;
return regs;
}
void pit_sleep(uint64_t ms)
@ -48,3 +53,14 @@ void pit_sleep(uint64_t ms)
asm volatile ("hlt");
}
}
/*void pit_sleep(uint64_t ms)
{
extern task_t* current_task;
current_task->wakeup_tick = pit_ticks + ms;
current_task->state = TASK_SLEEPING;
asm volatile("int $32");*/ /* force reschedule immediately */
/*}
*/