Massive refactoring of all code + audio skeleton.

This should make it easier to find files and (in the future) split things
up into separate libraries.
It also changes around emulator initialization to make it a little more
difficult to do things out of order and a little more sensible as to when
real init work happens.
Also adding a skeleton audio system/driver and reworking CPU register
access to be more extensible.

src/xenia/memory.h

@@ -0,0 +1,67 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2013 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_CORE_MEMORY_H_
+#define XENIA_CORE_MEMORY_H_
+
+#include <xenia/common.h>
+#include <xenia/core/ref.h>
+
+
+typedef struct {
+  int reserved;
+} xe_memory_options_t;
+
+
+struct xe_memory;
+typedef struct xe_memory* xe_memory_ref;
+
+
+xe_memory_ref xe_memory_create(xe_memory_options_t options);
+xe_memory_ref xe_memory_retain(xe_memory_ref memory);
+void xe_memory_release(xe_memory_ref memory);
+
+uint8_t *xe_memory_addr(xe_memory_ref memory, size_t guest_addr = 0);
+
+void xe_memory_copy(xe_memory_ref memory,
+                    uint32_t dest, uint32_t src, uint32_t size);
+
+uint32_t xe_memory_search_aligned(xe_memory_ref memory, size_t start,
+                                  size_t end, const uint32_t *values,
+                                  const size_t value_count);
+
+// These methods slice off memory from the virtual address space, unless
+// base_address is specified in which case they place into an address in
+// memory.
+
+enum {
+  XE_MEMORY_FLAG_64KB_PAGES = (1 << 1),
+  XE_MEMORY_FLAG_PHYSICAL   = (1 << 2),
+  XE_MEMORY_FLAG_ZERO       = (1 << 3),
+};
+
+enum {
+  XE_MEMORY_ACCESS_READ     = (1 << 1),
+  XE_MEMORY_ACCESS_WRITE    = (1 << 2)
+};
+
+void xe_memory_heap_dump(xe_memory_ref memory);
+
+uint32_t xe_memory_heap_alloc(xe_memory_ref memory, uint32_t base_address,
+                              uint32_t size, uint32_t flags,
+                              uint32_t alignment = 0x20);
+int  xe_memory_heap_free(xe_memory_ref memory, uint32_t addr, uint32_t size);
+
+bool xe_memory_is_valid(xe_memory_ref memory, uint32_t address);
+int xe_memory_protect(xe_memory_ref memory, uint32_t address, uint32_t size,
+                      uint32_t access);
+uint32_t xe_memory_query_protect(xe_memory_ref memory, uint32_t address);
+
+
+#endif  // XENIA_CORE_MEMORY_H_