src/drivers/ata.c


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#include <toxic/io.h>

int
ata_read_sector(
	int lba,
	int total,
	void *buf)
{
	int i, j;
	unsigned short *ptr; /* Get 2 bytes at a time from the controller */

	outb(0x1F6, (lba >> 24) | 0xE0);
	outb(0x1F2, total);
	outb(0x1F3, (unsigned char)(lba & 0xff));
	outb(0x1F4, (unsigned char)(lba >> 8));
	outb(0x1F5, (unsigned char)(lba >> 16));
	outb(0x1F7, 0x20);

	ptr = (unsigned short *)buf;

	for (i = 0; i < total; i++) {
		char c = insb(0x1F7);
		/* This should be implemented in interrupts */
		while (!(c & 0x08))
			c = insb(0x1F7);

		for (j = 0; j < 256; j++) {
			*ptr = insw(0x1F0);
			ptr++;
		}
	}

	return 0;
}