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 */ 28