99494e696e
This adds the system mailboxes which are used to communicate with a number of GPU peripherals on Pi/Pi2. Reviewed-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
28 lines
1.0 KiB
C
28 lines
1.0 KiB
C
/*
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* Raspberry Pi emulation (c) 2012 Gregory Estrade
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* This code is licensed under the GNU GPLv2 and later.
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*/
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#ifndef BCM2835_MBOX_DEFS_H
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#define BCM2835_MBOX_DEFS_H
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/* Constants shared with the ARM identifying separate mailbox channels */
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#define MBOX_CHAN_POWER 0 /* for use by the power management interface */
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#define MBOX_CHAN_FB 1 /* for use by the frame buffer */
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#define MBOX_CHAN_VCHIQ 3 /* for use by the VCHIQ interface */
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#define MBOX_CHAN_PROPERTY 8 /* for use by the property channel */
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#define MBOX_CHAN_COUNT 9
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#define MBOX_SIZE 32
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#define MBOX_INVALID_DATA 0x0f
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/* Layout of the private address space used for communication between
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* the mbox device emulation, and child devices: each channel occupies
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* 16 bytes of address space, but only two registers are presently defined.
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*/
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#define MBOX_AS_CHAN_SHIFT 4
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#define MBOX_AS_DATA 0 /* request / response data (RW at offset 0) */
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#define MBOX_AS_PENDING 4 /* pending response status (RO at offset 4) */
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#endif /* BCM2835_MBOX_DEFS_H */
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