[Qemu-devel] [PATCH v2 8/8] isa_mmio: simplify access to system I/O region

[Hervé Poussineau]

We can now simply use address_space_rw instead of the more convoluted
cpu_in() and cpu_out() functions.

Signed-off-by: Hervé Poussineau <address@hidden>
---
 hw/isa/isa_mmio.c |   42 +++++++++++-------------------------------
 1 file changed, 11 insertions(+), 31 deletions(-)

diff --git a/hw/isa/isa_mmio.c b/hw/isa/isa_mmio.c
index d4dbf13..5bf8878 100644
--- a/hw/isa/isa_mmio.c
+++ b/hw/isa/isa_mmio.c
@@ -26,44 +26,24 @@
 #include "hw/isa/isa.h"
 #include "exec/address-spaces.h"
 
-static void isa_mmio_writeb (void *opaque, hwaddr addr,
-                                  uint32_t val)
+static void isa_mmio_write(void *opaque, hwaddr addr, uint64_t data,
+                           unsigned int size)
 {
-    cpu_outb(addr & IOPORTS_MASK, val);
+    addr &= IOPORTS_MASK;
+    address_space_write(&address_space_io, addr, (uint8_t *)&data, size);
 }
 
-static void isa_mmio_writew(void *opaque, hwaddr addr,
-                               uint32_t val)
+static uint64_t isa_mmio_read(void *opaque, hwaddr addr, unsigned int size)
 {
-    cpu_outw(addr & IOPORTS_MASK, val);
-}
-
-static void isa_mmio_writel(void *opaque, hwaddr addr,
-                               uint32_t val)
-{
-    cpu_outl(addr & IOPORTS_MASK, val);
-}
-
-static uint32_t isa_mmio_readb (void *opaque, hwaddr addr)
-{
-    return cpu_inb(addr & IOPORTS_MASK);
-}
-
-static uint32_t isa_mmio_readw(void *opaque, hwaddr addr)
-{
-    return cpu_inw(addr & IOPORTS_MASK);
-}
-
-static uint32_t isa_mmio_readl(void *opaque, hwaddr addr)
-{
-    return cpu_inl(addr & IOPORTS_MASK);
+    uint64_t data = 0;
+    addr &= IOPORTS_MASK;
+    address_space_read(&address_space_io, addr, (uint8_t *)&data, size);
+    return data;
 }
 
 static const MemoryRegionOps isa_mmio_ops = {
-    .old_mmio = {
-        .write = { isa_mmio_writeb, isa_mmio_writew, isa_mmio_writel },
-        .read = { isa_mmio_readb, isa_mmio_readw, isa_mmio_readl, },
-    },
+    .write = isa_mmio_write,
+    .read = isa_mmio_read,
     .endianness = DEVICE_LITTLE_ENDIAN,
 };
 
-- 
1.7.10.4