Add file missed in last commit.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3151 c046a42c-6fe2-441c-8c8c-71466251a162

hw/vmport.c

@@ -0,0 +1,96 @@
+/*
+ * QEMU VMPort emulation
+ *
+ * Copyright (C) 2007 Hervé Poussineau
+ *
+ * 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 "vl.h"
+#include "cpu-all.h"
+
+#define VMPORT_CMD_GETVERSION 0x0a
+#define VMPORT_CMD_GETRAMSIZE 0x14
+
+#define VMPORT_ENTRIES 0x2c
+#define VMPORT_MAGIC   0x564D5868
+
+typedef struct _VMPortState
+{
+    CPUState *env;
+    IOPortReadFunc *func[VMPORT_ENTRIES];
+    void *opaque[VMPORT_ENTRIES];
+} VMPortState;
+
+static VMPortState port_state;
+
+void vmport_register(unsigned char command, IOPortReadFunc *func, void *opaque)
+{
+    if (command >= VMPORT_ENTRIES)
+        return;
+
+    port_state.func[command] = func;
+    port_state.opaque[command] = opaque;
+}
+
+static uint32_t vmport_ioport_read(void *opaque, uint32_t addr)
+{
+    VMPortState *s = opaque;
+    unsigned char command;
+    target_ulong eax;
+
+    eax = s->env->regs[R_EAX];
+    if (eax != VMPORT_MAGIC)
+        return eax;
+
+    command = s->env->regs[R_ECX];
+    if (command >= VMPORT_ENTRIES)
+        return eax;
+    if (!s->func[command])
+    {
+        printf("vmport: unknown command %x\n", command);
+        return eax;
+    }
+
+    return s->func[command](s->opaque[command], addr);
+}
+
+static uint32_t vmport_cmd_get_version(void *opaque, uint32_t addr)
+{
+    CPUState *env = opaque;
+    env->regs[R_EBX] = VMPORT_MAGIC;
+    return 6;
+}
+
+static uint32_t vmport_cmd_ram_size(void *opaque, uint32_t addr)
+{
+    CPUState *env = opaque;
+    env->regs[R_EBX] = 0x1177;
+    return ram_size;
+}
+
+void vmport_init(CPUState *env)
+{
+    port_state.env = env;
+
+    register_ioport_read(0x5658, 1, 4, vmport_ioport_read, &port_state);
+
+    /* Register some generic port commands */
+    vmport_register(VMPORT_CMD_GETVERSION, vmport_cmd_get_version, env);
+    vmport_register(VMPORT_CMD_GETRAMSIZE, vmport_cmd_ram_size, env);
+}