1/* 2 * Raspberry Pi emulation (c) 2012 Gregory Estrade 3 * 4 * This work is licensed under the terms of the GNU GPL, version 2 or later. 5 * See the COPYING file in the top-level directory. 6 */ 7 8#ifndef BCM2835_MBOX_DEFS_H 9#define BCM2835_MBOX_DEFS_H 10 11/* Constants shared with the ARM identifying separate mailbox channels */ 12#define MBOX_CHAN_POWER 0 /* for use by the power management interface */ 13#define MBOX_CHAN_FB 1 /* for use by the frame buffer */ 14#define MBOX_CHAN_VCHIQ 3 /* for use by the VCHIQ interface */ 15#define MBOX_CHAN_PROPERTY 8 /* for use by the property channel */ 16#define MBOX_CHAN_COUNT 9 17 18#define MBOX_SIZE 32 19#define MBOX_INVALID_DATA 0x0f 20 21/* Layout of the private address space used for communication between 22 * the mbox device emulation, and child devices: each channel occupies 23 * 16 bytes of address space, but only two registers are presently defined. 24 */ 25#define MBOX_AS_CHAN_SHIFT 4 26#define MBOX_AS_DATA 0 /* request / response data (RW at offset 0) */ 27#define MBOX_AS_PENDING 4 /* pending response status (RO at offset 4) */ 28 29#endif /* BCM2835_MBOX_DEFS_H */ 30