rwhandler: simplified way to register for mem/io

[qemu.git] / rwhandler.h

diff --git a/rwhandler.h b/rwhandler.h
new file mode 100644 (file)
index 0000000..bc11849
--- /dev/null
+++ b/rwhandler.h
@@ -0,0 +1,27 @@
+#ifndef READ_WRITE_HANDLER_H
+#define READ_WRITE_HANDLER_H
+
+#include "qemu-common.h"
+#include "ioport.h"
+
+typedef struct ReadWriteHandler ReadWriteHandler;
+
+/* len is guaranteed to be one of 1, 2 or 4, addr is guaranteed to fit in an
+ * appropriate type (io/memory/etc). They do not need to be range checked. */
+typedef void WriteHandlerFunc(ReadWriteHandler *, pcibus_t addr,
+                              uint32_t value, int len);
+typedef uint32_t ReadHandlerFunc(ReadWriteHandler *, pcibus_t addr, int len);
+
+struct ReadWriteHandler {
+    WriteHandlerFunc *write;
+    ReadHandlerFunc *read;
+};
+
+/* Helpers for when we want to use a single routine with length. */
+/* CPU memory handler: both read and write must be present. */
+int cpu_register_io_memory_simple(ReadWriteHandler *);
+/* io port handler: can supply only read or write handlers. */
+int register_ioport_simple(ReadWriteHandler *,
+                           pio_addr_t start, int length, int size);
+
+#endif