- __disk_ret(__func__, __LINE__, (regs), (code))
+ __disk_ret((regs), (code) | (__LINE__ << 8), __func__)
+void __disk_ret_unimplemented(struct bregs *regs, u32 linecode
+ , const char *fname);
+#define disk_ret_unimplemented(regs, code) \
+ __disk_ret_unimplemented((regs), (code) | (__LINE__ << 8), __func__)
+
+
+/****************************************************************
+ * Master boot record
+ ****************************************************************/
+
+struct packed_chs_s {
+ u8 heads;
+ u8 sptcyl;
+ u8 cyllow;
+};
+
+struct partition_s {
+ u8 status;
+ struct packed_chs_s first;
+ u8 type;
+ struct packed_chs_s last;
+ u32 lba;
+ u32 count;
+} PACKED;
+
+struct mbr_s {
+ u8 code[440];
+ // 0x01b8
+ u32 diskseg;
+ // 0x01bc
+ u16 null;
+ // 0x01be
+ struct partition_s partitions[4];
+ // 0x01fe
+ u16 signature;
+} PACKED;
+
+#define MBR_SIGNATURE 0xaa55
+
+
+/****************************************************************
+ * 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