| 52,96 → 52,10 |
|---|
| #include <errno.h> |
| #include <bool.h> |
| |
| #include "ata_bd.h" |
| |
| #define NAME "ata_bd" |
| |
| enum { |
| CTL_READ_START = 0, |
| CTL_WRITE_START = 1, |
| }; |
| |
| enum { |
| STATUS_FAILURE = 0 |
| }; |
| |
| enum { |
| MAX_DISKS = 2 |
| }; |
| |
| typedef union { |
| /* Read */ |
| struct { |
| uint8_t data_port; |
| uint8_t error; |
| uint8_t sector_count; |
| uint8_t sector_number; |
| uint8_t cylinder_low; |
| uint8_t cylinder_high; |
| uint8_t drive_head; |
| uint8_t status; |
| }; |
| |
| /* Write */ |
| struct { |
| uint8_t pad0[7]; |
| uint8_t command; |
| }; |
| } ata_cmd_t; |
| |
| typedef union { |
| /* Read */ |
| struct { |
| uint8_t pad0[6]; |
| uint8_t alt_status; |
| uint8_t drive_address; |
| }; |
| |
| /* Write */ |
| struct { |
| uint8_t pad1[6]; |
| uint8_t device_control; |
| uint8_t pad2; |
| }; |
| } ata_ctl_t; |
| |
| enum devctl_bits { |
| DCR_SRST = 0x04, /**< Software Reset */ |
| DCR_nIEN = 0x02 /**< Interrupt Enable (negated) */ |
| }; |
| |
| enum status_bits { |
| SR_BSY = 0x80, /**< Busy */ |
| SR_DRDY = 0x40, /**< Drive Ready */ |
| SR_DWF = 0x20, /**< Drive Write Fault */ |
| SR_DSC = 0x10, /**< Drive Seek Complete */ |
| SR_DRQ = 0x08, /**< Data Request */ |
| SR_CORR = 0x04, /**< Corrected Data */ |
| SR_IDX = 0x02, /**< Index */ |
| SR_ERR = 0x01 /**< Error */ |
| }; |
| |
| enum drive_head_bits { |
| DHR_DRV = 0x10 |
| }; |
| |
| enum error_bits { |
| ER_BBK = 0x80, /**< Bad Block Detected */ |
| ER_UNC = 0x40, /**< Uncorrectable Data Error */ |
| ER_MC = 0x20, /**< Media Changed */ |
| ER_IDNF = 0x10, /**< ID Not Found */ |
| ER_MCR = 0x08, /**< Media Change Request */ |
| ER_ABRT = 0x04, /**< Aborted Command */ |
| ER_TK0NF = 0x02, /**< Track 0 Not Found */ |
| ER_AMNF = 0x01 /**< Address Mark Not Found */ |
| }; |
| |
| typedef struct { |
| bool present; |
| unsigned heads; |
| unsigned cylinders; |
| unsigned sectors; |
| uint64_t blocks; |
| } disk_t; |
| |
| static const size_t block_size = 512; |
| static size_t comm_size; |
| |