hw: move DMA controllers to hw/dma/, configure with default-configs/

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 315 insertions, 0 deletions

diff --git a/hw/dma/sparc32_dma.c b/hw/dma/sparc32_dma.c
new file mode 100644
index 0000000..fd21533
--- /dev/null
+++ b/hw/dma/sparc32_dma.c
@@ -0,0 +1,315 @@
+/*
+ * QEMU Sparc32 DMA controller emulation
+ *
+ * Copyright (c) 2006 Fabrice Bellard
+ *
+ * Modifications:
+ *  2010-Feb-14 Artyom Tarasenko : reworked irq generation
+ *
+ * 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.
+ */
+
+#include "hw/hw.h"
+#include "hw/sparc/sparc32_dma.h"
+#include "hw/sparc/sun4m.h"
+#include "hw/sysbus.h"
+#include "trace.h"
+
+/*
+ * This is the DMA controller part of chip STP2000 (Master I/O), also
+ * produced as NCR89C100. See
+ * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C100.txt
+ * and
+ * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/DMA2.txt
+ */
+
+#define DMA_REGS 4
+#define DMA_SIZE (4 * sizeof(uint32_t))
+/* We need the mask, because one instance of the device is not page
+   aligned (ledma, start address 0x0010) */
+#define DMA_MASK (DMA_SIZE - 1)
+/* OBP says 0x20 bytes for ledma, the extras are aliased to espdma */
+#define DMA_ETH_SIZE (8 * sizeof(uint32_t))
+#define DMA_MAX_REG_OFFSET (2 * DMA_SIZE - 1)
+
+#define DMA_VER 0xa0000000
+#define DMA_INTR 1
+#define DMA_INTREN 0x10
+#define DMA_WRITE_MEM 0x100
+#define DMA_EN 0x200
+#define DMA_LOADED 0x04000000
+#define DMA_DRAIN_FIFO 0x40
+#define DMA_RESET 0x80
+
+/* XXX SCSI and ethernet should have different read-only bit masks */
+#define DMA_CSR_RO_MASK 0xfe000007
+
+typedef struct DMAState DMAState;
+
+struct DMAState {
+    SysBusDevice busdev;
+    MemoryRegion iomem;
+    uint32_t dmaregs[DMA_REGS];
+    qemu_irq irq;
+    void *iommu;
+    qemu_irq gpio[2];
+    uint32_t is_ledma;
+};
+
+enum {
+    GPIO_RESET = 0,
+    GPIO_DMA,
+};
+
+/* Note: on sparc, the lance 16 bit bus is swapped */
+void ledma_memory_read(void *opaque, hwaddr addr,
+                       uint8_t *buf, int len, int do_bswap)
+{
+    DMAState *s = opaque;
+    int i;
+
+    addr |= s->dmaregs[3];
+    trace_ledma_memory_read(addr);
+    if (do_bswap) {
+        sparc_iommu_memory_read(s->iommu, addr, buf, len);
+    } else {
+        addr &= ~1;
+        len &= ~1;
+        sparc_iommu_memory_read(s->iommu, addr, buf, len);
+        for(i = 0; i < len; i += 2) {
+            bswap16s((uint16_t *)(buf + i));
+        }
+    }
+}
+
+void ledma_memory_write(void *opaque, hwaddr addr,
+                        uint8_t *buf, int len, int do_bswap)
+{
+    DMAState *s = opaque;
+    int l, i;
+    uint16_t tmp_buf[32];
+
+    addr |= s->dmaregs[3];
+    trace_ledma_memory_write(addr);
+    if (do_bswap) {
+        sparc_iommu_memory_write(s->iommu, addr, buf, len);
+    } else {
+        addr &= ~1;
+        len &= ~1;
+        while (len > 0) {
+            l = len;
+            if (l > sizeof(tmp_buf))
+                l = sizeof(tmp_buf);
+            for(i = 0; i < l; i += 2) {
+                tmp_buf[i >> 1] = bswap16(*(uint16_t *)(buf + i));
+            }
+            sparc_iommu_memory_write(s->iommu, addr, (uint8_t *)tmp_buf, l);
+            len -= l;
+            buf += l;
+            addr += l;
+        }
+    }
+}
+
+static void dma_set_irq(void *opaque, int irq, int level)
+{
+    DMAState *s = opaque;
+    if (level) {
+        s->dmaregs[0] |= DMA_INTR;
+        if (s->dmaregs[0] & DMA_INTREN) {
+            trace_sparc32_dma_set_irq_raise();
+            qemu_irq_raise(s->irq);
+        }
+    } else {
+        if (s->dmaregs[0] & DMA_INTR) {
+            s->dmaregs[0] &= ~DMA_INTR;
+            if (s->dmaregs[0] & DMA_INTREN) {
+                trace_sparc32_dma_set_irq_lower();
+                qemu_irq_lower(s->irq);
+            }
+        }
+    }
+}
+
+void espdma_memory_read(void *opaque, uint8_t *buf, int len)
+{
+    DMAState *s = opaque;
+
+    trace_espdma_memory_read(s->dmaregs[1]);
+    sparc_iommu_memory_read(s->iommu, s->dmaregs[1], buf, len);
+    s->dmaregs[1] += len;
+}
+
+void espdma_memory_write(void *opaque, uint8_t *buf, int len)
+{
+    DMAState *s = opaque;
+
+    trace_espdma_memory_write(s->dmaregs[1]);
+    sparc_iommu_memory_write(s->iommu, s->dmaregs[1], buf, len);
+    s->dmaregs[1] += len;
+}
+
+static uint64_t dma_mem_read(void *opaque, hwaddr addr,
+                             unsigned size)
+{
+    DMAState *s = opaque;
+    uint32_t saddr;
+
+    if (s->is_ledma && (addr > DMA_MAX_REG_OFFSET)) {
+        /* aliased to espdma, but we can't get there from here */
+        /* buggy driver if using undocumented behavior, just return 0 */
+        trace_sparc32_dma_mem_readl(addr, 0);
+        return 0;
+    }
+    saddr = (addr & DMA_MASK) >> 2;
+    trace_sparc32_dma_mem_readl(addr, s->dmaregs[saddr]);
+    return s->dmaregs[saddr];
+}
+
+static void dma_mem_write(void *opaque, hwaddr addr,
+                          uint64_t val, unsigned size)
+{
+    DMAState *s = opaque;
+    uint32_t saddr;
+
+    if (s->is_ledma && (addr > DMA_MAX_REG_OFFSET)) {
+        /* aliased to espdma, but we can't get there from here */
+        trace_sparc32_dma_mem_writel(addr, 0, val);
+        return;
+    }
+    saddr = (addr & DMA_MASK) >> 2;
+    trace_sparc32_dma_mem_writel(addr, s->dmaregs[saddr], val);
+    switch (saddr) {
+    case 0:
+        if (val & DMA_INTREN) {
+            if (s->dmaregs[0] & DMA_INTR) {
+                trace_sparc32_dma_set_irq_raise();
+                qemu_irq_raise(s->irq);
+            }
+        } else {
+            if (s->dmaregs[0] & (DMA_INTR | DMA_INTREN)) {
+                trace_sparc32_dma_set_irq_lower();
+                qemu_irq_lower(s->irq);
+            }
+        }
+        if (val & DMA_RESET) {
+            qemu_irq_raise(s->gpio[GPIO_RESET]);
+            qemu_irq_lower(s->gpio[GPIO_RESET]);
+        } else if (val & DMA_DRAIN_FIFO) {
+            val &= ~DMA_DRAIN_FIFO;
+        } else if (val == 0)
+            val = DMA_DRAIN_FIFO;
+
+        if (val & DMA_EN && !(s->dmaregs[0] & DMA_EN)) {
+            trace_sparc32_dma_enable_raise();
+            qemu_irq_raise(s->gpio[GPIO_DMA]);
+        } else if (!(val & DMA_EN) && !!(s->dmaregs[0] & DMA_EN)) {
+            trace_sparc32_dma_enable_lower();
+            qemu_irq_lower(s->gpio[GPIO_DMA]);
+        }
+
+        val &= ~DMA_CSR_RO_MASK;
+        val |= DMA_VER;
+        s->dmaregs[0] = (s->dmaregs[0] & DMA_CSR_RO_MASK) | val;
+        break;
+    case 1:
+        s->dmaregs[0] |= DMA_LOADED;
+        /* fall through */
+    default:
+        s->dmaregs[saddr] = val;
+        break;
+    }
+}
+
+static const MemoryRegionOps dma_mem_ops = {
+    .read = dma_mem_read,
+    .write = dma_mem_write,
+    .endianness = DEVICE_NATIVE_ENDIAN,
+    .valid = {
+        .min_access_size = 4,
+        .max_access_size = 4,
+    },
+};
+
+static void dma_reset(DeviceState *d)
+{
+    DMAState *s = container_of(d, DMAState, busdev.qdev);
+
+    memset(s->dmaregs, 0, DMA_SIZE);
+    s->dmaregs[0] = DMA_VER;
+}
+
+static const VMStateDescription vmstate_dma = {
+    .name ="sparc32_dma",
+    .version_id = 2,
+    .minimum_version_id = 2,
+    .minimum_version_id_old = 2,
+    .fields      = (VMStateField []) {
+        VMSTATE_UINT32_ARRAY(dmaregs, DMAState, DMA_REGS),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static int sparc32_dma_init1(SysBusDevice *dev)
+{
+    DMAState *s = FROM_SYSBUS(DMAState, dev);
+    int reg_size;
+
+    sysbus_init_irq(dev, &s->irq);
+
+    reg_size = s->is_ledma ? DMA_ETH_SIZE : DMA_SIZE;
+    memory_region_init_io(&s->iomem, &dma_mem_ops, s, "dma", reg_size);
+    sysbus_init_mmio(dev, &s->iomem);
+
+    qdev_init_gpio_in(&dev->qdev, dma_set_irq, 1);
+    qdev_init_gpio_out(&dev->qdev, s->gpio, 2);
+
+    return 0;
+}
+
+static Property sparc32_dma_properties[] = {
+    DEFINE_PROP_PTR("iommu_opaque", DMAState, iommu),
+    DEFINE_PROP_UINT32("is_ledma", DMAState, is_ledma, 0),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void sparc32_dma_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+
+    k->init = sparc32_dma_init1;
+    dc->reset = dma_reset;
+    dc->vmsd = &vmstate_dma;
+    dc->props = sparc32_dma_properties;
+}
+
+static const TypeInfo sparc32_dma_info = {
+    .name          = "sparc32_dma",
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(DMAState),
+    .class_init    = sparc32_dma_class_init,
+};
+
+static void sparc32_dma_register_types(void)
+{
+    type_register_static(&sparc32_dma_info);
+}
+
+type_init(sparc32_dma_register_types)