From 7ceec0ee063215f59ccfd6a931ff8ae6f3e98278 Mon Sep 17 00:00:00 2001
From: Julien CLEMENT <julien.clement@epita.fr>
Date: Mon, 26 Jul 2021 00:24:04 +0200
Subject: [PATCH] working on ocw2

Signed-off-by: Julien CLEMENT <julien.clement@epita.fr>
---
 k/idt.c |  3 +++
 k/pic.c | 10 ++++++++++
 k/pic.h |  1 +
 3 files changed, 14 insertions(+)

diff --git a/k/idt.c b/k/idt.c
index 90d4503..3ec5f32 100644
--- a/k/idt.c
+++ b/k/idt.c
@@ -43,6 +43,9 @@ static struct idt_entry_descriptor idt_entries_descriptors[IDT_NB_ENTRIES] = {
 void interrupt_handler(struct isr_param *isr_param)
 {
     printf("Oh no %d!\r\n", isr_param->int_vector);
+    if (isr_param->int_vector > IDT_RESERVED_ENTRIES
+            && isr_param->int_vector < IDT_RESERVED_ENTRIES + 16)
+        acknowledge(isr_param->int_vector);
 }
 
 struct idt_entry create_idt_entry(struct idt_entry_descriptor descriptor)
diff --git a/k/pic.c b/k/pic.c
index 6045094..e04d533 100644
--- a/k/pic.c
+++ b/k/pic.c
@@ -1,6 +1,7 @@
 #include "idt.h"
 #include "io.h"
 #include "pic.h"
+#include "stdio.h"
 
 static void send_icw1(void)
 {
@@ -42,3 +43,12 @@ void init_pic(void)
     mask_irqs();
     asm volatile("sti");
 }
+
+void acknowledge(uint32_t int_vector)
+{
+    printf("acknowledging %d\r\n", int_vector);
+    uint8_t ocw2 = 0x20;
+    if (int_vector >= IDT_RESERVED_ENTRIES + 8)
+        outb(SLAVE_PIC_A, ocw2);
+    outb(MASTER_PIC_A, ocw2);
+}
diff --git a/k/pic.h b/k/pic.h
index c5cb2d8..40b44cc 100644
--- a/k/pic.h
+++ b/k/pic.h
@@ -9,5 +9,6 @@
 #define ICW1 0x11
 
 void init_pic(void);
+void acknowledge(uint32_t int_vector);
 
 #endif /* !PIC_H */