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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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70
drivers/irq.c
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@ -3,46 +3,74 @@
#include <drivers/pit.h>
#include <port_io.h>
/* TEMP DEBUG */
#include <tty.h>
#include <kernel/syscall.h>
#include <drivers/irq.h>
#define NUM_IRQS 0x90
irq_func_t func_list[NUM_IRQS];
#define MAX_IRQ_HANDLERS 128 /* the maximum number of irq handlers */
typedef struct {
uint32_t irq_no;
irq_func_t func;
} irq_handler_t;
static volatile uint32_t num_irqs_missed = 0;
uint32_t num_irq_handlers = 0;
irq_handler_t handler_list[MAX_IRQ_HANDLERS];
volatile uint32_t num_irqs_missed = 0;
void irq_init(void)
{
for (int i = 0; i < NUM_IRQS; i++)
for (int i = 0; i < MAX_IRQ_HANDLERS; i++)
{
func_list[i] = 0x0;
handler_list[i].irq_no = 0;
handler_list[i].func = NULL;
}
set_irq_handler(0, (irq_func_t*) pit_handler);
set_irq_handler(1, (irq_func_t*) keyboard_handler);
set_irq_handler(0, (irq_func_t) pit_handler);
//set_irq_handler(1, (irq_func_t) ps2_keyboard_handler);
}
void irq_handler(uint8_t irq_number)
registers_t* irq_handler(uint32_t irq, registers_t* regs)
{
if (irq_number < NUM_IRQS)
{
if (func_list[irq_number])
uint8_t funcs_called = 0;
if (num_irq_handlers > 0)
{
for (unsigned int i = 0; i < MAX_IRQ_HANDLERS; i++)
{
func_list[irq_number]();
outb(0x20, 0x20); /* Acknowledge the IRQ to PIC */
}
else
{
num_irqs_missed++;
if (handler_list[i].irq_no == irq && handler_list[i].func != NULL)
{
regs = handler_list[i].func(regs);
funcs_called++;
/* PIC IRQ acknowledgement happens in idt.c */
}
}
}
if (funcs_called == 0)
{
num_irqs_missed++;
}
return regs;
}
void set_irq_handler(uint32_t num, irq_func_t* handler)
uint32_t get_interrupts_missed(void)
{
if (num < NUM_IRQS)
return num_irqs_missed;
}
void set_irq_handler(uint32_t num, irq_func_t handler)
{
if (num < MAX_IRQ_HANDLERS)
{
func_list[num] = (irq_func_t)handler;
handler_list[num].irq_no = num;
handler_list[num].func = handler;
num_irq_handlers++;
}
}