Split disk.h into block.h and std/disk.h.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 129 insertions, 0 deletions

diff --git a/src/block.h b/src/block.h
new file mode 100644
index 0000000..3492806
--- /dev/null
+++ b/src/block.h
@@ -0,0 +1,129 @@
+#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