diff options
| author | Grégory ESTRADE <gregory.estrade@gmail.com> | 2016-03-16 17:06:02 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2016-03-16 17:42:18 +0000 |
| commit | 6717f587a478be37294cc5cfbbd84c5a6ce1aa1f (patch) | |
| tree | 9cb53643be1c8dff2798c61448c4bc3037b05122 /include/hw/dma/bcm2835_dma.h | |
| parent | 355a8ccc5c57b7ce8758585e2d5d8b7f82b38bec (diff) | |
| download | qemu-6717f587a478be37294cc5cfbbd84c5a6ce1aa1f.tar.gz | |
bcm2835_dma: add emulation of Raspberry Pi DMA controller
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>
Diffstat (limited to 'include/hw/dma/bcm2835_dma.h')
| -rw-r--r-- | include/hw/dma/bcm2835_dma.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/include/hw/dma/bcm2835_dma.h b/include/hw/dma/bcm2835_dma.h new file mode 100644 index 0000000000..75312e2e17 --- /dev/null +++ b/include/hw/dma/bcm2835_dma.h @@ -0,0 +1,47 @@ +/* + * Raspberry Pi emulation (c) 2012 Gregory Estrade + * This code is licensed under the GNU GPLv2 and later. + */ + +#ifndef BCM2835_DMA_H +#define BCM2835_DMA_H + +#include "qemu-common.h" +#include "exec/address-spaces.h" +#include "hw/sysbus.h" + +typedef struct { + uint32_t cs; + uint32_t conblk_ad; + uint32_t ti; + uint32_t source_ad; + uint32_t dest_ad; + uint32_t txfr_len; + uint32_t stride; + uint32_t nextconbk; + uint32_t debug; + + qemu_irq irq; +} BCM2835DMAChan; + +#define TYPE_BCM2835_DMA "bcm2835-dma" +#define BCM2835_DMA(obj) \ + OBJECT_CHECK(BCM2835DMAState, (obj), TYPE_BCM2835_DMA) + +#define BCM2835_DMA_NCHANS 16 + +typedef struct { + /*< private >*/ + SysBusDevice busdev; + /*< public >*/ + + MemoryRegion iomem0, iomem15; + MemoryRegion *dma_mr; + AddressSpace dma_as; + + BCM2835DMAChan chan[BCM2835_DMA_NCHANS]; + uint32_t int_status; + uint32_t enable; +} BCM2835DMAState; + +#endif |