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bcm2835_dma: add emulation of Raspberry Pi DMA controller

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At present, all DMA transfers complete inline (so a looping descriptor
queue will lock up the device). We also do not model pause/abort,
arbitrarion/priority, or debug features.

Signed-off-by: Grégory ESTRADE <gregory.estrade@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com>
Message-id: 1457467526-8840-6-git-send-email-Andrew.Baumann@microsoft.com
[AB: implement 2D mode, cleanup/refactoring for upstream submission]
Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Grégory ESTRADE 2016-03-16 17:06:02 +00:00 • committed by Peter Maydell
parent 355a8ccc5c
commit 6717f587a4
5 changed files with 484 additions and 0 deletions
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2
include/hw/arm/bcm2835_peripherals.h
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@ -16,6 +16,7 @@
#include "hw/sysbus.h"
#include "hw/char/bcm2835_aux.h"
#include "hw/display/bcm2835_fb.h"
#include "hw/dma/bcm2835_dma.h"
#include "hw/intc/bcm2835_ic.h"
#include "hw/misc/bcm2835_property.h"
#include "hw/misc/bcm2835_mbox.h"
@ -37,6 +38,7 @@ typedef struct BCM2835PeripheralState {
SysBusDevice *uart0;
BCM2835AuxState aux;
BCM2835FBState fb;
BCM2835DMAState dma;
BCM2835ICState ic;
BCM2835PropertyState property;
BCM2835MboxState mboxes;