102 lines
2.0 KiB
C
102 lines
2.0 KiB
C
#pragma once
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#include <stdint.h>
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#define ATA_PRIMARY 0x1F0
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#define ATA_SECONDARY 0x170
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#define ATA_MASTER 0x00
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#define ATA_SLAVE 0x10
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// Input to controller
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#define ATA_FEATURE(x) (x + 1)
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#define ATA_COUNT(x) (x + 2)
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#define ATA_LBAL(x) (x + 3)
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#define ATA_LBAM(x) (x + 4)
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#define ATA_LBAH(x) (x + 5)
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#define ATA_DEVICE(x) (x + 6)
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#define ATA_COMMAND(x) (x + 7)
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#define ATA_CONTROL(x) (x + 0x206)
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// Output from controller
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#define ATA_DATA(x) (x + 0)
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#define ATA_ERROR(x) (x + 1)
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// COUNT
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// LBAL
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// LBAM
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// LBAH
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// DEVICE
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#define ATA_STATUS(x) (x + 7)
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#define ATA_ERR (1<<0)
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#define ATA_DRQ (1<<3)
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#define ATA_SRV (1<<4)
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#define ATA_DF (1<<5)
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#define ATA_RDY (1<<6)
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#define ATA_BSY (1<<7)
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#define ATA_nIEN (1<<1)
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#define ATA_SRST (1<<2)
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#define ATA_CMD_IDENTIFY 0xEC
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#define ATA_CMD_IDENTIFY_PACKET 0xA1
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#define ATA_CMD_READ_SECTORS 0x20
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#define ATA_CMD_WRITE_SECTORS 0x30
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#define ATA_CMD_PACKET 0xA0
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#define ATAPI_LBA_MAGIC 0xEB1401
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typedef struct ata_drive
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{
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int exists;
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int bus;
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int ms;
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int atapi;
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struct {
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uint16_t config;
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uint16_t unused1[9];
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char serial[20];
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uint16_t unused2[3];
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char firmware[8];
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char model[40];
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uint8_t unused3;
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uint8_t sectors_per_interrupt;
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uint16_t unused4;
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uint16_t capabilities[2];
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uint16_t unused5[2];
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uint16_t validity;
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uint16_t unused6[3];
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uint32_t capacity_sectors;
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uint16_t sectors_per_command;
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uint32_t capacity_lba28;
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uint16_t unused7[38];
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uint64_t capcity_lba48;
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uint16_t unused8[152];
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}__attribute__((packed)) id;
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} ata_drive;
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ata_drive drives[4];
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typedef struct ata_cmd_st
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{
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uint16_t bus;
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union {
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uint8_t feature;
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uint8_t error;
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};
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uint8_t count;
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union {
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uint64_t lba;
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uint8_t lba_sep[4];
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};
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uint8_t device;
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union {
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uint8_t command;
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uint8_t status;
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};
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uint8_t wait_status;
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} ata_cmd_t;
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int ata_read_block(struct ata_drive *drive, uint64_t lba, void *buffer);
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int ata_write_block(struct ata_drive *drive, uint64_t lba, void *buffer);
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void ata_init();
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