bcm2835_mbox_defs.h (1124B)
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 */