Changeset 100185 in vbox for trunk/include

Timestamp:

Jun 16, 2023 6:54:50 AM (18 months ago)

Author:

vboxsync

Message:

Devices/VMMDev: Add an MMIO interface in addition to the existing PIO interface for guest additions running inside an ARM based guest. Also remove the dependency from the architecture page size and introduce a 4KiB VMM page size as ARM has different page sizes (4KiB, 16KiB, 64KiB) and it can differ between host and guest, bugref:10456

File:

• trunk/include/VBox/VMMDev.h (modified) (3 diffs)

trunk/include/VBox/VMMDev.h

@@ -54 +54 @@
  */
 
+/** The VMMDev assumed page size (not the real guest page size which might be different
+ * between guest and host, on ARM for example), 4KiB is the minimum supported by both
+ * ARM and x86 and was the one used back when the device supported x86 only. */
+#define VMMDEV_PAGE_SIZE                                    _4K
+/** The VMMDev assumed page shift. */
+#define VMMDEV_PAGE_SHIFT                                   12
+/** The VMMDev assumed page offset mask. */
+#define VMMDEV_PAGE_OFFSET_MASK                             0xfff
+
 
 /** Size of VMMDev RAM region accessible by guest.
@@ -59 +68 @@
  * For now: 4 megabyte.
  */
-#define VMMDEV_RAM_SIZE                                     (4 * 256 * PAGE_SIZE)
+#define VMMDEV_RAM_SIZE                                     (4 * 256 * VMMDEV_PAGE_SIZE)
 
 /** Size of VMMDev heap region accessible by guest.
  *  (Must be a power of two (pci range).)
  */
-#define VMMDEV_HEAP_SIZE                                    (4 * PAGE_SIZE)
+#define VMMDEV_HEAP_SIZE                                    (4 * VMMDEV_PAGE_SIZE)
 
 /** Port for generic request interface (relative offset). */
@@ -71 +80 @@
  * This works like VMMDevReq_AcknowledgeEvents when read.  */
 #define VMMDEV_PORT_OFF_REQUEST_FAST                        8
+
+
+/** The MMIO region size if MMIO is used instead of PIO. */
+#define VMMDEV_MMIO_SIZE                                    _4K
+/** Port for generic request interface (relative offset). */
+#define VMMDEV_MMIO_OFF_REQUEST                             0
+/** Port for requests that can be handled w/o going to ring-3 (relative offset).
+ * This works like VMMDevReq_AcknowledgeEvents when read.  */
+#define VMMDEV_MMIO_OFF_REQUEST_FAST                        8