ARM Versatile Platform Baseboard emulation.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1804 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 127 insertions, 0 deletions

diff --git a/hw/pl050.c b/hw/pl050.c
new file mode 100644
index 0000000..a71ccf6
--- /dev/null
+++ b/hw/pl050.c
@@ -0,0 +1,127 @@
+/* 
+ * Arm PrimeCell PL050 Kyeboard / Mouse Interface
+ *
+ * Copyright (c) 2006 CodeSourcery.
+ * Written by Paul Brook
+ *
+ * This code is licenced under the GPL.
+ */
+
+#include "vl.h"
+
+typedef struct {
+    void *dev;
+    uint32_t base;
+    uint32_t cr;
+    uint32_t clk;
+    uint32_t last;
+    void *pic;
+    int pending;
+    int irq;
+    int is_mouse;
+} pl050_state;
+
+static const unsigned char pl050_id[] =
+{ 0x50, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
+
+static void pl050_update(void *opaque, int level)
+{
+    pl050_state *s = (pl050_state *)opaque;
+    int raise;
+
+    s->pending = level;
+    raise = (s->pending && (s->cr & 0x10) != 0)
+            || (s->cr & 0x08) != 0;
+    pic_set_irq_new(s->pic, s->irq, raise);
+}
+
+static uint32_t pl050_read(void *opaque, target_phys_addr_t offset)
+{
+    pl050_state *s = (pl050_state *)opaque;
+    offset -= s->base;
+    if (offset >= 0xfe0 && offset < 0x1000)
+        return pl050_id[(offset - 0xfe0) >> 2];
+
+    switch (offset >> 2) {
+    case 0: /* KMICR */
+        return s->cr;
+    case 1: /* KMISTAT */
+        /* KMIC and KMID bits not implemented.  */
+        if (s->pending) {
+            return 0x10;
+        } else {
+            return 0;
+        }
+    case 2: /* KMIDATA */
+        if (s->pending)
+            s->last = ps2_read_data(s->dev);
+        return s->last;
+    case 3: /* KMICLKDIV */
+        return s->clk;
+    case 4: /* KMIIR */
+        return s->pending | 2;
+    default:
+        cpu_abort (cpu_single_env, "pl050_read: Bad offset %x\n", offset);
+        return 0;
+    }
+}
+
+static void pl050_write(void *opaque, target_phys_addr_t offset,
+                          uint32_t value)
+{
+    pl050_state *s = (pl050_state *)opaque;
+    offset -= s->base;
+    switch (offset >> 2) {
+    case 0: /* KMICR */
+        s->cr = value;
+        pl050_update(s, s->pending);
+        /* ??? Need to implement the enable/disable bit.  */
+        break;
+    case 2: /* KMIDATA */
+        /* ??? This should toggle the TX interrupt line.  */
+        /* ??? This means kbd/mouse can block each other.  */
+        if (s->is_mouse) {
+            ps2_write_mouse(s->dev, value);
+        } else {
+            ps2_write_keyboard(s->dev, value);
+        }
+        break;
+    case 3: /* KMICLKDIV */
+        s->clk = value;
+        return;
+    default:
+        cpu_abort (cpu_single_env, "pl050_write: Bad offset %x\n", offset);
+    }
+}
+static CPUReadMemoryFunc *pl050_readfn[] = {
+   pl050_read,
+   pl050_read,
+   pl050_read
+};
+
+static CPUWriteMemoryFunc *pl050_writefn[] = {
+   pl050_write,
+   pl050_write,
+   pl050_write
+};
+
+void pl050_init(uint32_t base, void *pic, int irq, int is_mouse)
+{
+    int iomemtype;
+    pl050_state *s;
+
+    s = (pl050_state *)qemu_mallocz(sizeof(pl050_state));
+    iomemtype = cpu_register_io_memory(0, pl050_readfn,
+                                       pl050_writefn, s);
+    cpu_register_physical_memory(base, 0x00000fff, iomemtype);
+    s->base = base;
+    s->pic = pic;
+    s->irq = irq;
+    s->is_mouse = is_mouse;
+    if (is_mouse)
+        s->dev = ps2_mouse_init(pl050_update, s);
+    else
+        s->dev = ps2_kbd_init(pl050_update, s);
+    /* ??? Save/restore.  */
+}
+