xamidev/blankos
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 7 Wiki Activity

Restructuration part 2: libc, programs

Browse Source
This commit is contained in:
xamidev
2024-07-19 17:40:53 +02:00
parent 014b0d2b50
commit b8faf9dd8e
24 changed files with 17 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

90
src/kernel/irq.c Normal file
View File

@@ -0,0 +1,90 @@
#include "system.h"
#include "io.h"
#include "idt.h"
extern void irq0();
extern void irq1();
extern void irq2();
extern void irq3();
extern void irq4();
extern void irq5();
extern void irq6();
extern void irq7();
extern void irq8();
extern void irq9();
extern void irq10();
extern void irq11();
extern void irq12();
extern void irq13();
extern void irq14();
extern void irq15();
void *irq_routines[16] =
{
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0
};
void irq_install_handler(int irq, void (*handler)(struct regs *r))
{
irq_routines[irq] = handler;
}
void irq_uninstall_handler(int irq)
{
irq_routines[irq] = 0;
}
void irq_remap(void)
{
outb(0x20, 0x11);
outb(0xA0, 0x11);
outb(0x21, 0x20);
outb(0xA1, 0x28);
outb(0x21, 0x04);
outb(0xA1, 0x02);
outb(0x21, 0x01);
outb(0xA1, 0x01);
outb(0x21, 0x0);
outb(0xA1, 0x0);
}
void irq_install()
{
irq_remap();
idt_set_gate(32, (unsigned)irq0, 0x08, 0x8E);
idt_set_gate(33, (unsigned)irq1, 0x08, 0x8E);
idt_set_gate(34, (unsigned)irq2, 0x08, 0x8E);
idt_set_gate(35, (unsigned)irq3, 0x08, 0x8E);
idt_set_gate(36, (unsigned)irq4, 0x08, 0x8E);
idt_set_gate(37, (unsigned)irq5, 0x08, 0x8E);
idt_set_gate(38, (unsigned)irq6, 0x08, 0x8E);
idt_set_gate(39, (unsigned)irq7, 0x08, 0x8E);
idt_set_gate(40, (unsigned)irq8, 0x08, 0x8E);
idt_set_gate(41, (unsigned)irq9, 0x08, 0x8E);
idt_set_gate(42, (unsigned)irq10, 0x08, 0x8E);
idt_set_gate(43, (unsigned)irq11, 0x08, 0x8E);
idt_set_gate(44, (unsigned)irq12, 0x08, 0x8E);
idt_set_gate(45, (unsigned)irq13, 0x08, 0x8E);
idt_set_gate(46, (unsigned)irq14, 0x08, 0x8E);
idt_set_gate(47, (unsigned)irq15, 0x08, 0x8E);
}
void irq_handler(struct regs *r)
{
void (*handler)(struct regs *r);
handler = irq_routines[r->int_no-32];
if (handler)
{
handler(r);
}
if (r->int_no >= 40)
{
outb(0xA0, 0x20);
}
outb(0x20, 0x20);
}