155 lines
3.6 KiB
C
155 lines
3.6 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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*
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* Values for ATA / PATA devices
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*/
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#pragma once
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#define ATA_SR_BSY 0x80
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#define ATA_SR_DRDY 0x40
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#define ATA_SR_DF 0x20
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#define ATA_SR_DSC 0x10
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#define ATA_SR_DRQ 0x08
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#define ATA_SR_CORR 0x04
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#define ATA_SR_IDX 0x02
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#define ATA_SR_ERR 0x01
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#define ATA_ER_BBK 0x80
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#define ATA_ER_UNC 0x40
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#define ATA_ER_MC 0x20
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#define ATA_ER_IDNF 0x10
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#define ATA_ER_MCR 0x08
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#define ATA_ER_ABRT 0x04
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#define ATA_ER_TK0NF 0x02
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#define ATA_ER_AMNF 0x01
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#define ATA_CMD_READ_PIO 0x20
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#define ATA_CMD_READ_PIO_EXT 0x24
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#define ATA_CMD_READ_DMA 0xC8
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#define ATA_CMD_READ_DMA_EXT 0x25
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#define ATA_CMD_WRITE_PIO 0x30
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#define ATA_CMD_WRITE_PIO_EXT 0x34
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#define ATA_CMD_WRITE_DMA 0xCA
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#define ATA_CMD_WRITE_DMA_EXT 0x35
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#define ATA_CMD_CACHE_FLUSH 0xE7
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#define ATA_CMD_CACHE_FLUSH_EXT 0xEA
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#define ATA_CMD_PACKET 0xA0
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#define ATA_CMD_IDENTIFY_PACKET 0xA1
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#define ATA_CMD_IDENTIFY 0xEC
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#define ATAPI_CMD_READ 0xA8
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#define ATAPI_CMD_EJECT 0x1B
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#define ATA_IDENT_DEVICETYPE 0
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#define ATA_IDENT_CYLINDERS 2
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#define ATA_IDENT_HEADS 6
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#define ATA_IDENT_SECTORS 12
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#define ATA_IDENT_SERIAL 20
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#define ATA_IDENT_MODEL 54
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#define ATA_IDENT_CAPABILITIES 98
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#define ATA_IDENT_FIELDVALID 106
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#define ATA_IDENT_MAX_LBA 120
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#define ATA_IDENT_COMMANDSETS 164
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#define ATA_IDENT_MAX_LBA_EXT 200
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#define IDE_ATA 0x00
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#define IDE_ATAPI 0x01
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#define ATA_MASTER 0x00
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#define ATA_SLAVE 0x01
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#define ATA_REG_DATA 0x00
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#define ATA_REG_ERROR 0x01
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#define ATA_REG_FEATURES 0x01
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#define ATA_REG_SECCOUNT0 0x02
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#define ATA_REG_LBA0 0x03
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#define ATA_REG_LBA1 0x04
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#define ATA_REG_LBA2 0x05
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#define ATA_REG_HDDEVSEL 0x06
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#define ATA_REG_COMMAND 0x07
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#define ATA_REG_STATUS 0x07
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#define ATA_REG_SECCOUNT1 0x08
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#define ATA_REG_LBA3 0x09
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#define ATA_REG_LBA4 0x0A
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#define ATA_REG_LBA5 0x0B
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#define ATA_REG_CONTROL 0x0C
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#define ATA_REG_ALTSTATUS 0x0C
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#define ATA_REG_DEVADDRESS 0x0D
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// Channels:
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#define ATA_PRIMARY 0x00
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#define ATA_SECONDARY 0x01
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// Directions:
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#define ATA_READ 0x00
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#define ATA_WRITE 0x01
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typedef struct {
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uint16_t base;
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uint16_t ctrl;
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uint16_t bmide;
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uint16_t nien;
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} ide_channel_regs_t;
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typedef struct {
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uint8_t reserved;
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uint8_t channel;
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uint8_t drive;
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uint16_t type;
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uint16_t signature;
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uint16_t capabilities;
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uint32_t command_sets;
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uint32_t size;
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uint8_t model[41];
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} ide_device_t;
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typedef struct {
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uint8_t status;
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uint8_t chs_first_sector[3];
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uint8_t type;
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uint8_t chs_last_sector[3];
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uint32_t lba_first_sector;
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uint32_t sector_count;
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} partition_t;
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typedef struct {
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uint16_t flags;
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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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uint16_t sectors_per_int;
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uint16_t unused3;
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uint16_t capabilities[2];
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uint16_t unused4[2];
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uint16_t valid_ext_data;
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uint16_t unused5[5];
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uint16_t size_of_rw_mult;
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uint32_t sectors_28;
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uint16_t unused6[38];
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uint64_t sectors_48;
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uint16_t unused7[152];
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} __attribute__((packed)) ata_identify_t;
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typedef struct {
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uint8_t boostrap[446];
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partition_t partitions[4];
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uint8_t signature[2];
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} __attribute__((packed)) mbr_t;
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struct ata_device {
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int io_base;
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int control;
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int slave;
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int is_atapi;
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ata_identify_t identity;
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unsigned int atapi_lba;
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unsigned int atapi_sector_size;
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};
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typedef union {
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uint8_t command_bytes[12];
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uint16_t command_words[6];
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} atapi_command_t;
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