1*99494e69SAndrew Baumann /* 2*99494e69SAndrew Baumann * Raspberry Pi emulation (c) 2012 Gregory Estrade 3*99494e69SAndrew Baumann * This code is licensed under the GNU GPLv2 and later. 4*99494e69SAndrew Baumann */ 5*99494e69SAndrew Baumann 6*99494e69SAndrew Baumann #ifndef BCM2835_MBOX_DEFS_H 7*99494e69SAndrew Baumann #define BCM2835_MBOX_DEFS_H 8*99494e69SAndrew Baumann 9*99494e69SAndrew Baumann /* Constants shared with the ARM identifying separate mailbox channels */ 10*99494e69SAndrew Baumann #define MBOX_CHAN_POWER 0 /* for use by the power management interface */ 11*99494e69SAndrew Baumann #define MBOX_CHAN_FB 1 /* for use by the frame buffer */ 12*99494e69SAndrew Baumann #define MBOX_CHAN_VCHIQ 3 /* for use by the VCHIQ interface */ 13*99494e69SAndrew Baumann #define MBOX_CHAN_PROPERTY 8 /* for use by the property channel */ 14*99494e69SAndrew Baumann #define MBOX_CHAN_COUNT 9 15*99494e69SAndrew Baumann 16*99494e69SAndrew Baumann #define MBOX_SIZE 32 17*99494e69SAndrew Baumann #define MBOX_INVALID_DATA 0x0f 18*99494e69SAndrew Baumann 19*99494e69SAndrew Baumann /* Layout of the private address space used for communication between 20*99494e69SAndrew Baumann * the mbox device emulation, and child devices: each channel occupies 21*99494e69SAndrew Baumann * 16 bytes of address space, but only two registers are presently defined. 22*99494e69SAndrew Baumann */ 23*99494e69SAndrew Baumann #define MBOX_AS_CHAN_SHIFT 4 24*99494e69SAndrew Baumann #define MBOX_AS_DATA 0 /* request / response data (RW at offset 0) */ 25*99494e69SAndrew Baumann #define MBOX_AS_PENDING 4 /* pending response status (RO at offset 4) */ 26*99494e69SAndrew Baumann 27*99494e69SAndrew Baumann #endif /* BCM2835_MBOX_DEFS_H */ 28