Initial Contribution

1 files changed, 200 insertions, 0 deletions

diff --git a/hw/goldfish_device.c b/hw/goldfish_device.c
new file mode 100644
index 0000000..a7d80a6
--- /dev/null
+++ b/hw/goldfish_device.c
@@ -0,0 +1,200 @@
+/* Copyright (C) 2007-2008 The Android Open Source Project
+**
+** This software is licensed under the terms of the GNU General Public
+** License version 2, as published by the Free Software Foundation, and
+** may be copied, distributed, and modified under those terms.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+** GNU General Public License for more details.
+*/
+#include "vl.h"
+#include "arm_pic.h"
+#include "goldfish_device.h"
+
+#define PDEV_BUS_OP_DONE        (0x00)
+#define PDEV_BUS_OP_REMOVE_DEV  (0x04)
+#define PDEV_BUS_OP_ADD_DEV     (0x08)
+
+#define PDEV_BUS_OP_INIT        (0x00)
+
+#define PDEV_BUS_OP             (0x00)
+#define PDEV_BUS_GET_NAME       (0x04)
+#define PDEV_BUS_NAME_LEN       (0x08)
+#define PDEV_BUS_ID             (0x0c)
+#define PDEV_BUS_IO_BASE        (0x10)
+#define PDEV_BUS_IO_SIZE        (0x14)
+#define PDEV_BUS_IRQ            (0x18)
+#define PDEV_BUS_IRQ_COUNT      (0x1c)
+
+struct bus_state {
+    struct goldfish_device dev;
+    struct goldfish_device *current;
+};
+
+qemu_irq *goldfish_pic;
+static struct goldfish_device *first_device;
+static struct goldfish_device *last_device;
+uint32_t goldfish_free_base;
+uint32_t goldfish_free_irq;
+
+void goldfish_device_set_irq(struct goldfish_device *dev, int irq, int level)
+{
+    if(irq >= dev->irq_count)
+        cpu_abort (cpu_single_env, "goldfish_device_set_irq: Bad irq %d >= %d\n", irq, dev->irq_count);
+    else
+        qemu_set_irq(goldfish_pic[dev->irq + irq], level);
+}
+
+int goldfish_add_device_no_io(struct goldfish_device *dev)
+{
+    if(dev->base == 0) {
+        dev->base = goldfish_free_base;
+        goldfish_free_base += dev->size;
+    }
+    if(dev->irq == 0 && dev->irq_count > 0) {
+        dev->irq = goldfish_free_irq;
+        goldfish_free_irq += dev->irq_count;
+    }
+    //printf("goldfish_add_device: %s, base %x %x, irq %d %d\n",
+    //       dev->name, dev->base, dev->size, dev->irq, dev->irq_count);
+    dev->next = NULL;
+    if(last_device) {
+        last_device->next = dev;
+    }
+    else {
+        first_device = dev;
+    }
+    last_device = dev;
+    return 0;
+}
+
+int goldfish_device_add(struct goldfish_device *dev,
+                       CPUReadMemoryFunc **mem_read,
+                       CPUWriteMemoryFunc **mem_write,
+                       void *opaque)
+{
+    int iomemtype;
+    goldfish_add_device_no_io(dev);
+    iomemtype = cpu_register_io_memory(0, mem_read,
+                                       mem_write, opaque);
+    cpu_register_physical_memory(dev->base, dev->size, iomemtype);
+    return 0;
+}
+
+static uint32_t goldfish_bus_read(void *opaque, target_phys_addr_t offset)
+{
+    struct bus_state *s = (struct bus_state *)opaque;
+    offset -= s->dev.base;
+
+    switch (offset) {
+        case PDEV_BUS_OP:
+            if(s->current) {
+                s->current->reported_state = 1;
+                s->current = s->current->next;
+            }
+            else {
+                s->current = first_device;
+            }
+            while(s->current && s->current->reported_state == 1)
+                s->current = s->current->next;
+            if(s->current)
+                return PDEV_BUS_OP_ADD_DEV;
+            else {
+                goldfish_device_set_irq(&s->dev, 0, 0);
+                return PDEV_BUS_OP_DONE;
+            }
+
+        case PDEV_BUS_NAME_LEN:
+            return s->current ? strlen(s->current->name) : 0;
+        case PDEV_BUS_ID:
+            return s->current ? s->current->id : 0;
+        case PDEV_BUS_IO_BASE:
+            return s->current ? s->current->base : 0;
+        case PDEV_BUS_IO_SIZE:
+            return s->current ? s->current->size : 0;
+        case PDEV_BUS_IRQ:
+            return s->current ? s->current->irq : 0;
+        case PDEV_BUS_IRQ_COUNT:
+            return s->current ? s->current->irq_count : 0;
+    default:
+        cpu_abort (cpu_single_env, "goldfish_bus_read: Bad offset %x\n", offset);
+        return 0;
+    }
+}
+
+static void goldfish_bus_op_init(struct bus_state *s)
+{
+    struct goldfish_device *dev = first_device;
+    while(dev) {
+        dev->reported_state = 0;
+        dev = dev->next;
+    }
+    s->current = NULL;
+    goldfish_device_set_irq(&s->dev, 0, first_device != NULL);
+}
+
+static void goldfish_bus_write(void *opaque, target_phys_addr_t offset, uint32_t value)
+{
+    struct bus_state *s = (struct bus_state *)opaque;
+    offset -= s->dev.base;
+
+    switch(offset) {
+        case PDEV_BUS_OP:
+            switch(value) {
+                case PDEV_BUS_OP_INIT:
+                    goldfish_bus_op_init(s);
+                    break;
+                default:
+                    cpu_abort (cpu_single_env, "goldfish_bus_write: Bad PDEV_BUS_OP value %x\n", value);
+            };
+            break;
+        case PDEV_BUS_GET_NAME:
+            if(s->current)
+                pmemcpy(value, s->current->name, strlen(s->current->name));
+            break;
+        default:
+            cpu_abort (cpu_single_env, "goldfish_bus_write: Bad offset %x\n", offset);
+    }
+}
+
+static CPUReadMemoryFunc *goldfish_bus_readfn[] = {
+    goldfish_bus_read,
+    goldfish_bus_read,
+    goldfish_bus_read
+};
+
+static CPUWriteMemoryFunc *goldfish_bus_writefn[] = {
+    goldfish_bus_write,
+    goldfish_bus_write,
+    goldfish_bus_write
+};
+
+
+static struct bus_state bus_state = {
+    .dev = {
+        .name = "goldfish_device_bus",
+        .id = -1,
+        .base = 0x10001000,
+        .size = 0x1000,
+        .irq = 1,
+        .irq_count = 1,
+    }
+};
+
+void goldfish_device_init(qemu_irq *pic, uint32_t base, uint32_t size, uint32_t irq, uint32_t irq_count)
+{
+    goldfish_pic = pic;
+    goldfish_free_base = base;
+    goldfish_free_irq = irq;
+}
+
+int goldfish_device_bus_init(uint32_t base, uint32_t irq)
+{
+    bus_state.dev.base = base;
+    bus_state.dev.irq = irq;
+
+    return goldfish_device_add(&bus_state.dev, goldfish_bus_readfn, goldfish_bus_writefn, &bus_state);
+}
+