include/hw/misc/bcm2835_mbox_defs.h

   1 /*
   2  * Raspberry Pi emulation (c) 2012 Gregory Estrade
   3  * This code is licensed under the GNU GPLv2 and later.
   4  */
   5
   6 #ifndef BCM2835_MBOX_DEFS_H
   7 #define BCM2835_MBOX_DEFS_H
   8
   9 /* Constants shared with the ARM identifying separate mailbox channels */
  10 #define MBOX_CHAN_POWER    0 /* for use by the power management interface */
  11 #define MBOX_CHAN_FB       1 /* for use by the frame buffer */
  12 #define MBOX_CHAN_VCHIQ    3 /* for use by the VCHIQ interface */
  13 #define MBOX_CHAN_PROPERTY 8 /* for use by the property channel */
  14 #define MBOX_CHAN_COUNT    9
  15
  16 #define MBOX_SIZE          32
  17 #define MBOX_INVALID_DATA  0x0f
  18
  19 /* Layout of the private address space used for communication between
  20  * the mbox device emulation, and child devices: each channel occupies
  21  * 16 bytes of address space, but only two registers are presently defined.
  22  */
  23 #define MBOX_AS_CHAN_SHIFT 4
  24 #define MBOX_AS_DATA       0 /* request / response data (RW at offset 0) */
  25 #define MBOX_AS_PENDING    4 /* pending response status (RO at offset 4) */
  26
  27 #endif /* BCM2835_MBOX_DEFS_H */