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-rw-r--r--ioport.c258
1 files changed, 258 insertions, 0 deletions
diff --git a/ioport.c b/ioport.c
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+++ b/ioport.c
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+/*
+ * 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;
+}
+
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