+ DISK_IOCTL_GETBLOCKSIZE = 4,\r
+ \r
+ /**\r
+ * ioctl(..., tTplDisk_CacheRegion *Region)\r
+ * \brief Sets the cache importantce and protocol for a section of\r
+ * memory.\r
+ * \param Region Pointer to a region information structure\r
+ * \return Boolean failure\r
+ */\r
+ DISK_IOCTL_SETCACHEREGION,\r
+ \r
+ /**\r
+ * ioctl(..., Uint64 *Info[2])\r
+ * \brief Asks the driver to precache a region of disk.\r
+ * \param Info 64-bit Address and Size pair describing the area to cache\r
+ * \return Number of blocks cached\r
+ */\r
+ DISK_IOCTL_PRECACHE\r
+};\r
+\r
+typedef struct sTplDisk_CacheRegion\r
+{\r
+ Uint64 Base; //!< Base of cache region\r
+ Uint64 Length; //!< Size of cache region\r
+ /**\r
+ * \brief Cache Protocol & Flags\r
+ * \r
+ * The low 4 bits denot the cache protocol to be used by the\r
+ * region (see ::eTplDisk_CacheProtocols for a list).\r
+ * The high 4 bits denote flags to apply to the cache (see\r
+ * ::eTplDisk_CacheFlags)\r
+ */\r
+ Uint8 Flags;\r
+ Uint8 Priority; //!< Lower is a higher proritory\r
+ Uint16 CacheSize; //!< Maximum size of cache, in blocks\r
+} tTplDisk_CacheRegion;\r
+\r
+/**\r
+ * \brief Cache protocols to use\r
+ */\r
+enum eTplDisk_CacheProtocols\r
+{\r
+ /**\r
+ * \brief Region is not cached\r
+ */\r
+ DISK_CACHEPROTO_DONTCACHE,\r
+ /**\r
+ * \brief Most recently used blocks cached\r
+ * \note This is the default action for undefined regions\r
+ */\r
+ DISK_CACHEPROTO_RECENTLYUSED,\r
+ /**\r
+ * \brief Cache the entire region in memory\r
+ * \r
+ * This is a faster version of setting Length to CacheSize*BlockSize\r
+ */\r
+ DISK_CACHEPROTO_FULLCACHE,\r
+ \r
+ /**\r
+ * \brief Cache only on demand\r
+ * \r
+ * Only cache when the ::DISK_IOCTL_PRECACHE ioctl is used\r
+ */\r
+ DISK_CACHEPROTO_EXPLICIT\r
+};\r
+enum eTplDisk_CacheFlags\r
+{\r
+ DISK_CACHEFLAG_WRITETHROUGH\r