split out ioport related stuffs from vl.c into ioport.c.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 258 insertions, 0 deletions

diff --git a/ioport.c b/ioport.c
new file mode 100644
index 0000000000..d875209115
--- /dev/null
+++ b/ioport.c
@@ -0,0 +1,258 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * 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.
+ */
+/*
+ * splitted out ioport related stuffs from vl.c.
+ */
+
+#include "ioport.h"
+
+/***********************************************************/
+/* IO Port */
+
+//#define DEBUG_UNUSED_IOPORT
+//#define DEBUG_IOPORT
+
+#ifdef DEBUG_IOPORT
+#  define LOG_IOPORT(...) qemu_log_mask(CPU_LOG_IOPORT, ## __VA_ARGS__)
+#else
+#  define LOG_IOPORT(...) do { } while (0)
+#endif
+
+/* XXX: use a two level table to limit memory usage */
+
+static void *ioport_opaque[MAX_IOPORTS];
+static IOPortReadFunc *ioport_read_table[3][MAX_IOPORTS];
+static IOPortWriteFunc *ioport_write_table[3][MAX_IOPORTS];
+
+static IOPortReadFunc default_ioport_readb, default_ioport_readw, default_ioport_readl;
+static IOPortWriteFunc default_ioport_writeb, default_ioport_writew, default_ioport_writel;
+
+static uint32_t ioport_read(int index, uint32_t address)
+{
+    static IOPortReadFunc *default_func[3] = {
+        default_ioport_readb,
+        default_ioport_readw,
+        default_ioport_readl
+    };
+    IOPortReadFunc *func = ioport_read_table[index][address];
+    if (!func)
+        func = default_func[index];
+    return func(ioport_opaque[address], address);
+}
+
+static void ioport_write(int index, uint32_t address, uint32_t data)
+{
+    static IOPortWriteFunc *default_func[3] = {
+        default_ioport_writeb,
+        default_ioport_writew,
+        default_ioport_writel
+    };
+    IOPortWriteFunc *func = ioport_write_table[index][address];
+    if (!func)
+        func = default_func[index];
+    func(ioport_opaque[address], address, data);
+}
+
+static uint32_t default_ioport_readb(void *opaque, uint32_t address)
+{
+#ifdef DEBUG_UNUSED_IOPORT
+    fprintf(stderr, "unused inb: port=0x%04x\n", address);
+#endif
+    return 0xff;
+}
+
+static void default_ioport_writeb(void *opaque, uint32_t address, uint32_t data)
+{
+#ifdef DEBUG_UNUSED_IOPORT
+    fprintf(stderr, "unused outb: port=0x%04x data=0x%02x\n", address, data);
+#endif
+}
+
+/* default is to make two byte accesses */
+static uint32_t default_ioport_readw(void *opaque, uint32_t address)
+{
+    uint32_t data;
+    data = ioport_read(0, address);
+    address = (address + 1) & (MAX_IOPORTS - 1);
+    data |= ioport_read(0, address) << 8;
+    return data;
+}
+
+static void default_ioport_writew(void *opaque, uint32_t address, uint32_t data)
+{
+    ioport_write(0, address, data & 0xff);
+    address = (address + 1) & (MAX_IOPORTS - 1);
+    ioport_write(0, address, (data >> 8) & 0xff);
+}
+
+static uint32_t default_ioport_readl(void *opaque, uint32_t address)
+{
+#ifdef DEBUG_UNUSED_IOPORT
+    fprintf(stderr, "unused inl: port=0x%04x\n", address);
+#endif
+    return 0xffffffff;
+}
+
+static void default_ioport_writel(void *opaque, uint32_t address, uint32_t data)
+{
+#ifdef DEBUG_UNUSED_IOPORT
+    fprintf(stderr, "unused outl: port=0x%04x data=0x%02x\n", address, data);
+#endif
+}
+
+/* size is the word size in byte */
+int register_ioport_read(int start, int length, int size,
+                         IOPortReadFunc *func, void *opaque)
+{
+    int i, bsize;
+
+    if (size == 1) {
+        bsize = 0;
+    } else if (size == 2) {
+        bsize = 1;
+    } else if (size == 4) {
+        bsize = 2;
+    } else {
+        hw_error("register_ioport_read: invalid size");
+        return -1;
+    }
+    for(i = start; i < start + length; i += size) {
+        ioport_read_table[bsize][i] = func;
+        if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque)
+            hw_error("register_ioport_read: invalid opaque");
+        ioport_opaque[i] = opaque;
+    }
+    return 0;
+}
+
+/* size is the word size in byte */
+int register_ioport_write(int start, int length, int size,
+                          IOPortWriteFunc *func, void *opaque)
+{
+    int i, bsize;
+
+    if (size == 1) {
+        bsize = 0;
+    } else if (size == 2) {
+        bsize = 1;
+    } else if (size == 4) {
+        bsize = 2;
+    } else {
+        hw_error("register_ioport_write: invalid size");
+        return -1;
+    }
+    for(i = start; i < start + length; i += size) {
+        ioport_write_table[bsize][i] = func;
+        if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque)
+            hw_error("register_ioport_write: invalid opaque");
+        ioport_opaque[i] = opaque;
+    }
+    return 0;
+}
+
+void isa_unassign_ioport(int start, int length)
+{
+    int i;
+
+    for(i = start; i < start + length; i++) {
+        ioport_read_table[0][i] = default_ioport_readb;
+        ioport_read_table[1][i] = default_ioport_readw;
+        ioport_read_table[2][i] = default_ioport_readl;
+
+        ioport_write_table[0][i] = default_ioport_writeb;
+        ioport_write_table[1][i] = default_ioport_writew;
+        ioport_write_table[2][i] = default_ioport_writel;
+
+        ioport_opaque[i] = NULL;
+    }
+}
+
+/***********************************************************/
+
+void cpu_outb(CPUState *env, int addr, int val)
+{
+    LOG_IOPORT("outb: %04x %02x\n", addr, val);
+    ioport_write(0, addr, val);
+#ifdef CONFIG_KQEMU
+    if (env)
+        env->last_io_time = cpu_get_time_fast();
+#endif
+}
+
+void cpu_outw(CPUState *env, int addr, int val)
+{
+    LOG_IOPORT("outw: %04x %04x\n", addr, val);
+    ioport_write(1, addr, val);
+#ifdef CONFIG_KQEMU
+    if (env)
+        env->last_io_time = cpu_get_time_fast();
+#endif
+}
+
+void cpu_outl(CPUState *env, int addr, int val)
+{
+    LOG_IOPORT("outl: %04x %08x\n", addr, val);
+    ioport_write(2, addr, val);
+#ifdef CONFIG_KQEMU
+    if (env)
+        env->last_io_time = cpu_get_time_fast();
+#endif
+}
+
+int cpu_inb(CPUState *env, int addr)
+{
+    int val;
+    val = ioport_read(0, addr);
+    LOG_IOPORT("inb : %04x %02x\n", addr, val);
+#ifdef CONFIG_KQEMU
+    if (env)
+        env->last_io_time = cpu_get_time_fast();
+#endif
+    return val;
+}
+
+int cpu_inw(CPUState *env, int addr)
+{
+    int val;
+    val = ioport_read(1, addr);
+    LOG_IOPORT("inw : %04x %04x\n", addr, val);
+#ifdef CONFIG_KQEMU
+    if (env)
+        env->last_io_time = cpu_get_time_fast();
+#endif
+    return val;
+}
+
+int cpu_inl(CPUState *env, int addr)
+{
+    int val;
+    val = ioport_read(2, addr);
+    LOG_IOPORT("inl : %04x %08x\n", addr, val);
+#ifdef CONFIG_KQEMU
+    if (env)
+        env->last_io_time = cpu_get_time_fast();
+#endif
+    return val;
+}
+