ide stuff

kernel/drivers/atapi/ata.h

@@ -0,0 +1,60 @@
+#ifndef KATA_H
+#define KATA_H
+
+#include <stdint.h>
+
+#define IDE_PRIMARY_IO_BASE 0x1F0
+#define IDE_PRIMARY_CRTL_BASE 0x3F6
+
+#define IDE_SECONDARY_IO_BASE 0x170
+#define IDE_SECONDARY_CRTL_BASE 0x376
+
+#define IO_DATA_REG 0x00
+#define IO_ERROR_REG 0x01
+#define IO_FEATURE_REG 0x01
+#define IO_SECTOR_COUNT_REG 0x02
+#define IO_SECTOR_NUM_REG 0x03 
+#define IO_LBA_LO_REG 0x03
+#define IO_CYL_LO_REG 0x04
+#define IO_LBA_MID_REG 0x04
+#define IO_LBA_HI_REG 0x05
+#define IO_CYL_HI_REG 0x05
+#define IO_DRIVE_SELECT_REG 0x06
+#define IO_STATUS_REG 0x07
+#define IO_CMD_REG 0x07
+
+#define CTRL_ALT_STATUS_REG 0x00
+#define CTRL_DEV_CTRL_REG 0x00
+#define CTRL_DRIVE_ADDR_REG 0x01
+
+#define ERROR_REG_AMNF  0b00000001  // Address mark not found
+#define ERROR_REG_TKZNF 0b00000010  // Track zero not found
+#define ERROR_REG_ABRT  0b00000100  // Aborted command
+#define ERROR_REG_MCR   0b00001000  // Media change request
+#define ERROR_REG_IDNF  0b00010000  // ID not found
+#define ERROR_REG_MC    0b00100000  // Media changed
+#define ERROR_REG_UNC   0b01000000  // Uncorrectable data error
+#define ERROR_REG_BBK   0b10000000  // Bad Block detected
+
+#define DRIVE_SELECT_REG_BN     0b00000111
+#define DRIVE_SELECT_REG_DRV    0b00010000
+#define DRIVE_SELECT_REG_LBAA   0b01000000
+
+#define STATUS_REG_ERR  0b00000001
+#define STATUS_REG_IDX  0b00000010
+#define STATUS_REG_CORR 0b00000100
+#define STATUS_REG_DRQ  0b00001000
+#define STATUS_REG_SRV  0b00010000
+#define STATUS_REG_DF   0b00100000
+#define STATUS_REG_RDY  0b01000000
+#define STATUS_REG_BSY  0b10000000
+
+#define DEV_CTRL_REG_nIEN   0b00000001
+#define DEV_CTRL_REG_SRST   0b00000010
+#define DEV_CTRL_REG_HOB    0b10000000
+
+#define DRIVE_ADDR_REG_DS0  0b00000001
+#define DRIVE_ADDR_REG_DS1  0b00000010
+#define DRIVE_ADDR_REG      0b00111100
+
+#endif

kernel/drivers/atapi/ata_stubs.S

@@ -0,0 +1,7 @@
+#include "drivers/atapi/ata.h"
+
+.code32
+
+.global ident_drives
+ident_drives:
+    ret