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/*
* bubbl
* Copyright (C) 2025 Raghuram Subramani <raghus2247@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "common.h"
#include <boot/interrupts.h>
#include <kernel/halt.h>
#include <kernel/io.h>
#include <libk/stdio.h>
namespace Interrupts
{
extern "C" void *isr_stub_table[];
entry_t l_entries[256];
descriptor_t descriptor = { sizeof(l_entries) - 1, l_entries };
static bool l_idt_loaded = false;
bool
idt_loaded(void)
{
return l_idt_loaded;
}
void
initialize()
{
load_idt();
printk("\nInterrupts", "IDT Loaded.");
enable();
printk("Interrupts", "Initialized.");
}
void
load_idt(void)
{
for (uint16_t i = 0; i < 256; i++)
l_entries[i] = (entry_t) { 0 };
/* The first 32 entries are exceptions */
for (uint8_t i = 0; i < 32; i++)
l_entries[i] = (entry_t) IDT_ENTRY((uint32_t) isr_stub_table[i],
IDT_PRESENT | IDT_KERNEL_PRIVILEGE_LEVEL
| IDT_32BIT_INTERRUPT_GATE);
__asm__ volatile("lidt %0" ::"m"(descriptor));
l_idt_loaded = true;
}
void
enable(void)
{
if (!l_idt_loaded) {
printk("Interrupts", "Attempt to enable before IDT load.");
ASSERT_NOT_REACHED();
}
__asm__ volatile("sti");
// printk("\ninterrupts", "Enabled.");
}
void
disable(void)
{
__asm__ volatile("cli");
// printk("\ninterrupts", "Disabled.");
}
}
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