src/kernel.c


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#include <stdint.h>
#include <stddef.h>
#include <toxic/vga.h>
#include <toxic/string.h>
#include <toxic/kernel.h>
#include <toxic/idt.h>
#include <toxic/io.h>
#include <mm/kernel_heap.h>
#include <mm/paging.h>

static struct page_directory *kernel_directory;

void start_kernel()
{
	init_display(2);
	vprintl("Hello World!!!\n");
	vprintl("Testing it!!!\n");

	kernel_heap_init();
	interrupts_init();

	kernel_directory = paging_new_directory(PAGING_IS_WRITABLE |
					  PAGING_IS_PRESENT  |
					  PAGING_USER_ACCESS);

	paging_switch(kernel_directory);

	char *ptr = kzalloc(4096);
	char *ptr2;

	paging_map_vaddr(kernel_directory, (void *)0x1000,
		   ptr,
		   (PAGING_USER_ACCESS |
		   PAGING_IS_PRESENT | PAGING_IS_WRITABLE));

	enable_paging();
	enable_interrupts();

	ptr2 = (char *) 0x1000;
	ptr[0] = 'A';
	vprintl(ptr);
	vprintl(ptr2);

	ptr2[1] = 'B';
	vprintl("new ptr\n");
	vprintl(ptr);
	vprintl(ptr2);

	kfree(ptr);

}