diff --git a/include/exec/ioport.h b/include/exec/ioport.h
index b476857..ba3ebb8 100644
--- a/include/exec/ioport.h
+++ b/include/exec/ioport.h
@@ -25,7 +25,6 @@
 #define IOPORT_H
 
 #include "qemu-common.h"
-#include "exec/iorange.h"
 
 typedef uint32_t pio_addr_t;
 #define FMT_pioaddr     PRIx32
@@ -36,10 +35,6 @@ typedef uint32_t pio_addr_t;
 /* These should really be in isa.h, but are here to make pc.h happy.  */
 typedef void (IOPortWriteFunc)(void *opaque, uint32_t address, uint32_t data);
 typedef uint32_t (IOPortReadFunc)(void *opaque, uint32_t address);
-typedef void (IOPortDestructor)(void *opaque);
-
-void ioport_register(IORange *iorange);
-void isa_unassign_ioport(pio_addr_t start, int length);
 
 void cpu_outb(pio_addr_t addr, uint8_t val);
 void cpu_outw(pio_addr_t addr, uint16_t val);
diff --git a/include/exec/iorange.h b/include/exec/iorange.h
deleted file mode 100644
index cd980a8..0000000
--- a/include/exec/iorange.h
+++ /dev/null
@@ -1,31 +0,0 @@
-#ifndef IORANGE_H
-#define IORANGE_H
-
-#include <stdint.h>
-
-typedef struct IORange IORange;
-typedef struct IORangeOps IORangeOps;
-
-struct IORangeOps {
-    void (*read)(IORange *iorange, uint64_t offset, unsigned width,
-                 uint64_t *data);
-    void (*write)(IORange *iorange, uint64_t offset, unsigned width,
-                  uint64_t data);
-    void (*destructor)(IORange *iorange);
-};
-
-struct IORange {
-    const IORangeOps *ops;
-    uint64_t base;
-    uint64_t len;
-};
-
-static inline void iorange_init(IORange *iorange, const IORangeOps *ops,
-                                uint64_t base, uint64_t len)
-{
-    iorange->ops = ops;
-    iorange->base = base;
-    iorange->len = len;
-}
-
-#endif
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 5c9a958..cad73f5 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -22,7 +22,6 @@
 #include "exec/cpu-common.h"
 #include "exec/hwaddr.h"
 #include "qemu/queue.h"
-#include "exec/iorange.h"
 #include "exec/ioport.h"
 #include "qemu/int128.h"
 
@@ -42,14 +41,6 @@ struct MemoryRegionMmio {
     CPUWriteMemoryFunc *write[3];
 };
 
-/* Internal use; thunks between old-style IORange and MemoryRegions. */
-typedef struct MemoryRegionIORange MemoryRegionIORange;
-struct MemoryRegionIORange {
-    IORange iorange;
-    MemoryRegion *mr;
-    hwaddr offset;
-};
-
 /*
  * Memory region callbacks
  */
diff --git a/ioport.c b/ioport.c
index 9f15567..000087e 100644
--- a/ioport.c
+++ b/ioport.c
@@ -30,252 +30,14 @@
 #include "exec/memory.h"
 #include "exec/address-spaces.h"
 
-/***********************************************************/
-/* IO Port */
-
-//#define DEBUG_UNUSED_IOPORT
 //#define DEBUG_IOPORT
 
-#ifdef DEBUG_UNUSED_IOPORT
-#  define LOG_UNUSED_IOPORT(fmt, ...) fprintf(stderr, fmt, ## __VA_ARGS__)
-#else
-#  define LOG_UNUSED_IOPORT(fmt, ...) do{ } while (0)
-#endif
-
 #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 IOPortDestructor *ioport_destructor_table[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 * const 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 * const 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)
-{
-    LOG_UNUSED_IOPORT("unused inb: port=0x%04"PRIx32"\n", address);
-    return 0xff;
-}
-
-static void default_ioport_writeb(void *opaque, uint32_t address, uint32_t data)
-{
-    LOG_UNUSED_IOPORT("unused outb: port=0x%04"PRIx32" data=0x%02"PRIx32"\n",
-                      address, data);
-}
-
-/* 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) & IOPORTS_MASK;
-    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) & IOPORTS_MASK;
-    ioport_write(0, address, (data >> 8) & 0xff);
-}
-
-static uint32_t default_ioport_readl(void *opaque, uint32_t address)
-{
-    LOG_UNUSED_IOPORT("unused inl: port=0x%04"PRIx32"\n", address);
-    return 0xffffffff;
-}
-
-static void default_ioport_writel(void *opaque, uint32_t address, uint32_t data)
-{
-    LOG_UNUSED_IOPORT("unused outl: port=0x%04"PRIx32" data=0x%02"PRIx32"\n",
-                      address, data);
-}
-
-static int ioport_bsize(int size, int *bsize)
-{
-    if (size == 1) {
-        *bsize = 0;
-    } else if (size == 2) {
-        *bsize = 1;
-    } else if (size == 4) {
-        *bsize = 2;
-    } else {
-        return -1;
-    }
-    return 0;
-}
-
-/* size is the word size in byte */
-static int register_ioport_read(pio_addr_t start, int length, int size,
-                                IOPortReadFunc *func, void *opaque)
-{
-    int i, bsize;
-
-    if (ioport_bsize(size, &bsize)) {
-        hw_error("register_ioport_read: invalid size");
-        return -1;
-    }
-    for(i = start; i < start + length; ++i) {
-        ioport_read_table[bsize][i] = func;
-        if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque)
-            hw_error("register_ioport_read: invalid opaque for address 0x%x",
-                     i);
-        ioport_opaque[i] = opaque;
-    }
-    return 0;
-}
-
-/* size is the word size in byte */
-static int register_ioport_write(pio_addr_t start, int length, int size,
-                                 IOPortWriteFunc *func, void *opaque)
-{
-    int i, bsize;
-
-    if (ioport_bsize(size, &bsize)) {
-        hw_error("register_ioport_write: invalid size");
-        return -1;
-    }
-    for(i = start; i < start + length; ++i) {
-        ioport_write_table[bsize][i] = func;
-        if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque)
-            hw_error("register_ioport_write: invalid opaque for address 0x%x",
-                     i);
-        ioport_opaque[i] = opaque;
-    }
-    return 0;
-}
-
-static uint32_t ioport_readb_thunk(void *opaque, uint32_t addr)
-{
-    IORange *ioport = opaque;
-    uint64_t data;
-
-    ioport->ops->read(ioport, addr - ioport->base, 1, &data);
-    return data;
-}
-
-static uint32_t ioport_readw_thunk(void *opaque, uint32_t addr)
-{
-    IORange *ioport = opaque;
-    uint64_t data;
-
-    ioport->ops->read(ioport, addr - ioport->base, 2, &data);
-    return data;
-}
-
-static uint32_t ioport_readl_thunk(void *opaque, uint32_t addr)
-{
-    IORange *ioport = opaque;
-    uint64_t data;
-
-    ioport->ops->read(ioport, addr - ioport->base, 4, &data);
-    return data;
-}
-
-static void ioport_writeb_thunk(void *opaque, uint32_t addr, uint32_t data)
-{
-    IORange *ioport = opaque;
-
-    ioport->ops->write(ioport, addr - ioport->base, 1, data);
-}
-
-static void ioport_writew_thunk(void *opaque, uint32_t addr, uint32_t data)
-{
-    IORange *ioport = opaque;
-
-    ioport->ops->write(ioport, addr - ioport->base, 2, data);
-}
-
-static void ioport_writel_thunk(void *opaque, uint32_t addr, uint32_t data)
-{
-    IORange *ioport = opaque;
-
-    ioport->ops->write(ioport, addr - ioport->base, 4, data);
-}
-
-static void iorange_destructor_thunk(void *opaque)
-{
-    IORange *iorange = opaque;
-
-    if (iorange->ops->destructor) {
-        iorange->ops->destructor(iorange);
-    }
-}
-
-void ioport_register(IORange *ioport)
-{
-    register_ioport_read(ioport->base, ioport->len, 1,
-                         ioport_readb_thunk, ioport);
-    register_ioport_read(ioport->base, ioport->len, 2,
-                         ioport_readw_thunk, ioport);
-    register_ioport_read(ioport->base, ioport->len, 4,
-                         ioport_readl_thunk, ioport);
-    register_ioport_write(ioport->base, ioport->len, 1,
-                          ioport_writeb_thunk, ioport);
-    register_ioport_write(ioport->base, ioport->len, 2,
-                          ioport_writew_thunk, ioport);
-    register_ioport_write(ioport->base, ioport->len, 4,
-                          ioport_writel_thunk, ioport);
-    ioport_destructor_table[ioport->base] = iorange_destructor_thunk;
-}
-
-void isa_unassign_ioport(pio_addr_t start, int length)
-{
-    int i;
-
-    if (ioport_destructor_table[start]) {
-        ioport_destructor_table[start](ioport_opaque[start]);
-        ioport_destructor_table[start] = NULL;
-    }
-    for(i = start; i < start + length; i++) {
-        ioport_read_table[0][i] = NULL;
-        ioport_read_table[1][i] = NULL;
-        ioport_read_table[2][i] = NULL;
-
-        ioport_write_table[0][i] = NULL;
-        ioport_write_table[1][i] = NULL;
-        ioport_write_table[2][i] = NULL;
-
-        ioport_opaque[i] = NULL;
-    }
-}
-
-/***********************************************************/
-
 void cpu_outb(pio_addr_t addr, uint8_t val)
 {
     LOG_IOPORT("outb: %04"FMT_pioaddr" %02"PRIx8"\n", addr, val);
