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Working PIT irqs, fix GDT bugs

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This commit is contained in:
Kamil Kowalczyk
2025-12-09 17:14:01 +01:00
parent 9c8946de51
commit 64b14f3878
16 changed files with 382 additions and 138 deletions
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33
kernel/platform/i386_pc/sys/pic.c
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@@ -29,8 +29,10 @@ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <libk/types.h>
#include <sys/pic.h>
#include <sys/ioport.h>
#include <sys/isr.h>
#define PIC1 0x20
#define PIC2 0xA0
@@ -38,6 +40,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#define PIC1_DATA (PIC1 + 1)
#define PIC2_CMD PIC2
#define PIC2_DATA (PIC2 + 1)
#define PIC_EOI 0x20
#define ICW1_ICW4 0x01
#define ICW1_SINGLE 0x02
@@ -62,10 +65,10 @@ void pic_init(void) {
ioport_out8(PIC2_CMD, ICW1_INIT | ICW1_ICW4);
ioport_wait();
ioport_out8(PIC1_DATA, 4);
ioport_out8(PIC1_DATA, 0x20);
ioport_wait();
ioport_out8(PIC2_DATA, 2);
ioport_out8(PIC2_DATA, 0x28);
ioport_wait();
ioport_out8(PIC1_DATA, 1<<CASCADE_IRQ);
@@ -79,6 +82,28 @@ void pic_init(void) {
ioport_out8(PIC2_DATA, ICW4_8086);
ioport_wait();
ioport_out8(PIC1_DATA, 0xFF);
ioport_out8(PIC2_DATA, 0xFF);
pic_mask();
}
void pic_mask(void) {
ioport_out8(PIC1_DATA, 0xFF);
ioport_wait();
ioport_out8(PIC2_DATA, 0xFF);
ioport_wait();
}
void pic_unmask(void) {
ioport_out8(PIC1_DATA, 0);
ioport_wait();
ioport_out8(PIC2_DATA, 0);
ioport_wait();
}
void pic_fini(uint8_t trap) {
if (trap >= 40) {
ioport_out8(PIC2_CMD, PIC_EOI);
ioport_wait();
}
ioport_out8(PIC1_CMD, PIC_EOI);
ioport_wait();
}