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-rw-r--r--src/block.h129
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diff --git a/src/block.h b/src/block.h
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+#ifndef __BLOCK_H
+#define __BLOCK_H
+
+#include "types.h" // u32
+
+
+/****************************************************************
+ * Disk command request
+ ****************************************************************/
+
+struct disk_op_s {
+ u64 lba;
+ void *buf_fl;
+ struct drive_s *drive_g;
+ u16 count;
+ u8 command;
+};
+
+#define CMD_RESET 0x00
+#define CMD_READ 0x02
+#define CMD_WRITE 0x03
+#define CMD_VERIFY 0x04
+#define CMD_FORMAT 0x05
+#define CMD_SEEK 0x07
+#define CMD_ISREADY 0x10
+
+
+/****************************************************************
+ * Global storage
+ ****************************************************************/
+
+struct chs_s {
+ u16 heads; // # heads
+ u16 cylinders; // # cylinders
+ u16 spt; // # sectors / track
+ u16 pad;
+};
+
+// ElTorito Device Emulation data
+struct cdemu_s {
+ struct drive_s *emulated_drive_gf;
+ u32 ilba;
+ u16 buffer_segment;
+ u16 load_segment;
+ u16 sector_count;
+ u8 active;
+ u8 media;
+ u8 emulated_extdrive;
+
+ // Virtual device
+ struct chs_s lchs;
+};
+
+struct drive_s {
+ u8 type; // Driver type (DTYPE_*)
+ u8 floppy_type; // Type of floppy (only for floppy drives).
+ struct chs_s lchs; // Logical CHS
+ u64 sectors; // Total sectors count
+ u32 cntl_id; // Unique id for a given driver type.
+ u8 removable; // Is media removable (currently unused)
+
+ // Info for EDD calls
+ u8 translation; // type of translation
+ u16 blksize; // block size
+ struct chs_s pchs; // Physical CHS
+};
+
+#define DISK_SECTOR_SIZE 512
+#define CDROM_SECTOR_SIZE 2048
+
+#define DTYPE_NONE 0x00
+#define DTYPE_FLOPPY 0x01
+#define DTYPE_ATA 0x02
+#define DTYPE_ATA_ATAPI 0x03
+#define DTYPE_RAMDISK 0x04
+#define DTYPE_CDEMU 0x05
+#define DTYPE_AHCI 0x06
+#define DTYPE_AHCI_ATAPI 0x07
+#define DTYPE_VIRTIO_SCSI 0x08
+#define DTYPE_VIRTIO_BLK 0x09
+#define DTYPE_USB 0x0a
+#define DTYPE_UAS 0x0b
+#define DTYPE_LSI_SCSI 0x0c
+#define DTYPE_ESP_SCSI 0x0d
+#define DTYPE_MEGASAS 0x0e
+
+#define MAXDESCSIZE 80
+
+#define TRANSLATION_NONE 0
+#define TRANSLATION_LBA 1
+#define TRANSLATION_LARGE 2
+#define TRANSLATION_RECHS 3
+
+#define EXTTYPE_FLOPPY 0
+#define EXTTYPE_HD 1
+#define EXTTYPE_CD 2
+
+#define EXTSTART_HD 0x80
+#define EXTSTART_CD 0xE0
+
+
+/****************************************************************
+ * Function defs
+ ****************************************************************/
+
+// block.c
+extern struct dpte_s DefaultDPTE;
+extern u8 FloppyCount, CDCount;
+extern u8 *bounce_buf_fl;
+struct drive_s *getDrive(u8 exttype, u8 extdriveoffset);
+int getDriveId(u8 exttype, struct drive_s *drive_g);
+void map_floppy_drive(struct drive_s *drive_g);
+void map_hd_drive(struct drive_s *drive_g);
+void map_cd_drive(struct drive_s *drive_g);
+struct bregs;
+void __disk_ret(struct bregs *regs, u32 linecode, const char *fname);
+void __disk_ret_unimplemented(struct bregs *regs, u32 linecode
+ , const char *fname);
+int process_op(struct disk_op_s *op);
+int send_disk_op(struct disk_op_s *op);
+int create_bounce_buf(void);
+
+// Helper function for setting up a return code.
+#define disk_ret(regs, code) \
+ __disk_ret((regs), (code) | (__LINE__ << 8), __func__)
+#define disk_ret_unimplemented(regs, code) \
+ __disk_ret_unimplemented((regs), (code) | (__LINE__ << 8), __func__)
+
+#endif // block.h