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// MIT License, Copyright (c) 2020 Marvin Borner
#include <cpu.h>
#include <def.h>
#include <ide.h>
#include <print.h>
int ide_stat()
{
inb(IDE_IO + IDE_CMD);
inb(IDE_IO + IDE_CMD);
inb(IDE_IO + IDE_CMD);
inb(IDE_IO + IDE_CMD);
return inb(IDE_IO + IDE_CMD);
}
void ide_wait()
{
int stat = 0;
do
stat = ide_stat();
while ((stat & IDE_BUSY) != 0);
}
// TODO: Fix strange ide_read bugs
void *ide_read(void *b, u32 block)
{
u8 sector_count = BLOCK_SIZE / SECTOR_SIZE; // 2
u32 sector = block * sector_count;
outb(IDE_IO + IDE_SECTOR_COUNT, (u8)sector_count); // Number of sectors
outb(IDE_IO + IDE_LOW, LBA_LOW(sector));
outb(IDE_IO + IDE_MID, LBA_MID(sector));
outb(IDE_IO + IDE_HIGH, LBA_HIGH(sector));
// Slave/Master << 4 and last 4 bits
outb(IDE_IO + IDE_SELECT, 0xE0 | (1 << 4) | LBA_LAST(sector));
outb(IDE_IO + IDE_CMD, IDE_CMD_READ);
ide_wait();
insl(IDE_IO, b, BLOCK_SIZE / 4);
return b;
}
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