| 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 */ |