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add: multiboot2 memory map debug print

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xamidev
2024-09-04 20:17:01 +02:00
parent f1f45fbeb6
commit 3b39a0a1f4
2 changed files with 444 additions and 1 deletions
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28
src/kernel/kmain.c
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@@ -12,10 +12,12 @@
#include <stdint.h>
#include "../drivers/framebuffer.h"
#include "kmain.h"
#include "multiboot2.h"
void kmain(multiboot2_info *mb_info)
{
multiboot2_tag_framebuffer *fb_info = NULL;
struct multiboot_tag_mmap *mmap_tag = NULL;
uint8_t *tags = mb_info->tags;
while (1) {
@@ -23,9 +25,12 @@ void kmain(multiboot2_info *mb_info)
uint32_t tag_size = *((uint32_t*) (tags + 4));
if (tag_type == 0) break;
if (tag_type == 8) {
if (tag_type == MULTIBOOT_TAG_TYPE_FRAMEBUFFER) {
fb_info = (multiboot2_tag_framebuffer*) tags;
}
if (tag_type == MULTIBOOT_TAG_TYPE_MMAP) {
mmap_tag = (struct multiboot_tag_mmap*) tags;
}
tags += ((tag_size + 7) & ~7);
}
@@ -54,6 +59,27 @@ void kmain(multiboot2_info *mb_info)
printf("[kernel] framebuffer discovered at 0x%x\n", fb_info->framebuffer_addr);
printf("[kernel] fb0: width=%u, height=%u, pitch=%u, bpp=%u\n", fb_info->framebuffer_width, fb_info->framebuffer_height, fb_info->framebuffer_pitch, fb_info->framebuffer_bpp);
if (mmap_tag)
{
printf("[kernel] found memory map tag by multiboot2\n");
struct multiboot_mmap_entry *mmap = mmap_tag->entries;
while ((uint8_t*) mmap < tags + mmap_tag->size)
{
if (mmap->addr != 0)
{
printf("[debug] base addr=0x%x%x, length=0x%x%x, type=%u\n",
(uint32_t) (mmap->addr >> 32),
(uint32_t) (mmap->addr & 0xFFFFFFFF),
(uint32_t) (mmap->len >> 32),
(uint32_t) (mmap->len & 0xFFFFFFFF),
mmap->type);
}
mmap = (struct multiboot_mmap_entry*) ((uint8_t*)mmap + mmap_tag->entry_size);
}
}
init_serial();
gdt_install();
idt_install();