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#include <arch/types.h>

/**

 * RAM disk version

 */

#define RD_VERSION  0

/**

 * RAM disk magic number

 */

#define RD_MAGIC_SIZE   4

#define RD_MAG0         'H'

#define RD_MAG1         'O'

#define RD_MAG2         'R'

#define RD_MAG3         'D'

/**

 * RAM disk data encoding types

 */

#define RD_DATA_NONE    0

#define RD_DATA_LSB     1       /* Least significant byte first (little endian) */

#define RD_DATA_MSB     2       /* Most signigicant byte first (big endian) */

/**

 * RAM disk error return codes

 */

#define RE_OK           0   /* No error */

#define RE_INVALID      1   /* Invalid RAM disk image */

#define RE_UNSUPPORTED      2   /* Non-supported image (e.g. wrong version) */

/** RAM disk header */

typedef struct {

    uint8_t magic[RD_MAGIC_SIZE];

    uint8_t version;

    uint8_t data_type;

    uint32_t header_size;

    uint64_t data_size;

} rd_header;