xlnx-zdma: Add a model of the Xilinx ZynqMP generic DMA

Add a model of the generic DMA found on Xilinx ZynqMP.

Signed-off-by: Francisco Iglesias <frasse.iglesias@gmail.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 20180503214201.29082-2-frasse.iglesias@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 84 insertions, 0 deletions

diff --git a/include/hw/dma/xlnx-zdma.h b/include/hw/dma/xlnx-zdma.h
new file mode 100644
index 0000000..0b240b4
--- /dev/null
+++ b/include/hw/dma/xlnx-zdma.h
@@ -0,0 +1,84 @@
+/*
+ * QEMU model of the ZynqMP generic DMA
+ *
+ * Copyright (c) 2014 Xilinx Inc.
+ * Copyright (c) 2018 FEIMTECH AB
+ *
+ * Written by Edgar E. Iglesias <edgar.iglesias@xilinx.com>,
+ *            Francisco Iglesias <francisco.iglesias@feimtech.se>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef XLNX_ZDMA_H
+#define XLNX_ZDMA_H
+
+#include "hw/sysbus.h"
+#include "hw/register.h"
+#include "sysemu/dma.h"
+
+#define ZDMA_R_MAX (0x204 / 4)
+
+typedef enum {
+    DISABLED = 0,
+    ENABLED = 1,
+    PAUSED = 2,
+} XlnxZDMAState;
+
+typedef union {
+    struct {
+        uint64_t addr;
+        uint32_t size;
+        uint32_t attr;
+    };
+    uint32_t words[4];
+} XlnxZDMADescr;
+
+typedef struct XlnxZDMA {
+    SysBusDevice parent_obj;
+    MemoryRegion iomem;
+    MemTxAttrs attr;
+    MemoryRegion *dma_mr;
+    AddressSpace *dma_as;
+    qemu_irq irq_zdma_ch_imr;
+
+    struct {
+        uint32_t bus_width;
+    } cfg;
+
+    XlnxZDMAState state;
+    bool error;
+
+    XlnxZDMADescr dsc_src;
+    XlnxZDMADescr dsc_dst;
+
+    uint32_t regs[ZDMA_R_MAX];
+    RegisterInfo regs_info[ZDMA_R_MAX];
+
+    /* We don't model the common bufs. Must be at least 16 bytes
+       to model write only mode.  */
+    uint8_t buf[2048];
+} XlnxZDMA;
+
+#define TYPE_XLNX_ZDMA "xlnx.zdma"
+
+#define XLNX_ZDMA(obj) \
+     OBJECT_CHECK(XlnxZDMA, (obj), TYPE_XLNX_ZDMA)
+
+#endif /* XLNX_ZDMA_H */