1 files changed, 73 insertions, 0 deletions

diff --git a/src/core/mem_map.h b/src/core/mem_map.h
new file mode 100644
index 000000000..ad5abd16d
--- /dev/null
+++ b/src/core/mem_map.h
@@ -0,0 +1,73 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.
+
+#pragma once
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+#include "common_types.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+enum {
+    MEM_BOOTROM_SIZE        = 0x00010000,       ///< Bootrom (super secret code/data @ 0x8000) size
+    MEM_MPCORE_PRIV_SIZE    = 0x00002000,       ///< MPCore private memory region size
+    MEM_VRAM_SIZE           = 0x00600000,       ///< VRAM size
+    MEM_DSP_SIZE            = 0x00080000,       ///< DSP memory size
+    MEM_AXI_WRAM_SIZE       = 0x00080000,       ///< AXI WRAM size
+    MEM_FCRAM_SIZE          = 0x08000000,       ///< FCRAM size... Really 0x07E00000, but power of 2
+                                            //      works much better
+    MEM_SCRATCHPAD_SIZE     = 0x00004000,  ///< Typical stack size - TODO: Read from exheader
+                            
+    MEM_VRAM_MASK           = 0x007FFFFF,
+    MEM_FCRAM_MASK          = (MEM_FCRAM_SIZE - 1),                 ///< FCRAM mask
+    MEM_SCRATCHPAD_MASK     = (MEM_SCRATCHPAD_SIZE - 1),           ///< Scratchpad memory mask
+                            
+    MEM_FCRAM_PADDR     = 0x20000000,                           ///< FCRAM physical address
+    MEM_FCRAM_PADDR_END = (MEM_FCRAM_PADDR + MEM_FCRAM_SIZE),   ///< FCRAM end of physical space
+    MEM_FCRAM_VADDR     = 0x08000000,                           ///< FCRAM virtual address
+    MEM_FCRAM_VADDR_END = (MEM_FCRAM_VADDR + MEM_FCRAM_SIZE),   ///< FCRAM end of virtual space
+
+    MEM_VRAM_VADDR          = 0x1F000000,
+    MEM_SCRATCHPAD_VADDR    = (0x10000000 - MEM_SCRATCHPAD_SIZE),  ///< Scratchpad virtual address
+};
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+namespace Memory {
+
+// Base is a pointer to the base of the memory map. Yes, some MMU tricks
+// are used to set up a full GC or Wii memory map in process memory.  on
+// 32-bit, you have to mask your offsets with 0x3FFFFFFF. This means that
+// some things are mirrored too many times, but eh... it works.
+
+// In 64-bit, this might point to "high memory" (above the 32-bit limit),
+// so be sure to load it into a 64-bit register.
+extern u8 *g_base; 
+
+// These are guaranteed to point to "low memory" addresses (sub-32-bit).
+// 64-bit: Pointers to low-mem (sub-0x10000000) mirror
+// 32-bit: Same as the corresponding physical/virtual pointers.
+extern u8* g_fcram;                     ///< Main memory
+extern u8* g_vram;                      ///< Video memory (VRAM)
+extern u8* g_scratchpad;    ///< Stack memory
+
+void Init();
+void Shutdown();
+
+u8 Read8(const u32 addr);
+u16 Read16(const u32 addr);
+u32 Read32(const u32 addr);
+
+u32 Read8_ZX(const u32 addr);
+u32 Read16_ZX(const u32 addr);
+
+void Write8(const u32 addr, const u8 data);
+void Write16(const u32 addr, const u16 data);
+void Write32(const u32 addr, const u32 data);
+
+u8* GetPointer(const u32 Address);
+
+} // namespace