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KimisOS
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More ATA stuff

This commit is contained in:
notsomeidiot123 2025-09-05 12:58:05 -04:00
parent 3e3ce1fe26
commit aaf48337ec
1 changed files with 25 additions and 2 deletions
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27
src/kmodules/disk_driver.c
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@ -54,7 +54,8 @@ make fini function to destroy global object, and free any remaining resources.
#define ATA_IDENTIFY 0xEC
#define ATA_MASTER_DRIVE 0x1F0
#define ATA_PRIMARY_BUS 0x1F0
#define ATA_SECONDARY_BUS 0x170
#define ATA_IS_ATA(a) a[0] & 0x8000
#define ATA_GET_SZ28(a) (a[60] | (a[61] << 16))
@ -93,11 +94,33 @@ make fini function to destroy global object, and free any remaining resources.
//data address mark not found
#define ATA_AMNF(a) a & 0x1;
struct {
uint8_t pio_mode:1;
uint8_t lba48:1;
uint8_t drive:2;
}settings = {1, 0, 0};
void fini();
void ata_identify();
//return 1 if ready, 0 if not
uint16_t get_bus_from_drive(uint32_t drive){
return drive & 2 ? ATA_SECONDARY_BUS : ATA_PRIMARY_BUS;
}
int ata_ready(uint32_t drive){
uint16_t status = inb(drive ATA_ALT_STATUS);
uint16_t bus = get_bus_from_drive(drive);
if(settings.drive != drive){
if(drive & 1){
outb(bus ATA_DRIVE_HEAD, drive & 1 ? 0xB0 : 0xA0);
}
for(uint32_t i = 0; i < 15; i++){
uint8_t _ = inb(bus ATA_ALT_STATUS);
}
settings.drive = drive;
}
uint8_t status = inb(bus ATA_ALT_STATUS);
if(!ATA_BSY(status) || ATA_DRQ(status)) return 1;
return 0;
}