| /* |
| * Raspberry Pi emulation (c) 2012 Gregory Estrade |
| * This code is licensed under the GNU GPLv2 and later. |
| */ |
| |
| #ifndef BCM2835_MBOX_DEFS_H |
| #define BCM2835_MBOX_DEFS_H |
| |
| /* Constants shared with the ARM identifying separate mailbox channels */ |
| #define MBOX_CHAN_POWER 0 /* for use by the power management interface */ |
| #define MBOX_CHAN_FB 1 /* for use by the frame buffer */ |
| #define MBOX_CHAN_VCHIQ 3 /* for use by the VCHIQ interface */ |
| #define MBOX_CHAN_PROPERTY 8 /* for use by the property channel */ |
| #define MBOX_CHAN_COUNT 9 |
| |
| #define MBOX_SIZE 32 |
| #define MBOX_INVALID_DATA 0x0f |
| |
| /* Layout of the private address space used for communication between |
| * the mbox device emulation, and child devices: each channel occupies |
| * 16 bytes of address space, but only two registers are presently defined. |
| */ |
| #define MBOX_AS_CHAN_SHIFT 4 |
| #define MBOX_AS_DATA 0 /* request / response data (RW at offset 0) */ |
| #define MBOX_AS_PENDING 4 /* pending response status (RO at offset 4) */ |
| |
| #endif /* BCM2835_MBOX_DEFS_H */ |
