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authorShizZy <shizzy@6bit.net>2013-09-06 05:04:04 +0200
committerShizZy <shizzy@6bit.net>2013-09-06 05:04:04 +0200
commit62d873da3ec77044d0135dbb2c6492eca29482fa (patch)
tree3a21f3df2e1784af68f2df5ac98ced6a73f43c20 /src
parentadded core and mem_map files to the project (diff)
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Diffstat (limited to 'src')
-rw-r--r--src/common/src/common_funcs.h2
-rw-r--r--src/common/src/mem_arena.cpp10
-rw-r--r--src/common/src/mem_arena.h3
-rw-r--r--src/core/src/mem_map.cpp52
-rw-r--r--src/core/src/mem_map.h29
5 files changed, 80 insertions, 16 deletions
diff --git a/src/common/src/common_funcs.h b/src/common/src/common_funcs.h
index 73320a3ac..9fa44c894 100644
--- a/src/common/src/common_funcs.h
+++ b/src/common/src/common_funcs.h
@@ -22,6 +22,8 @@ template<> struct CompileTimeAssert<true> {};
#define b32(x) (b16(x) | (b16(x) >>16) )
#define ROUND_UP_POW2(x) (b32(x - 1) + 1)
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
+
#if defined __GNUC__ && !defined __SSSE3__ && !defined _M_GENERIC
#include <emmintrin.h>
static __inline __m128i __attribute__((__always_inline__))
diff --git a/src/common/src/mem_arena.cpp b/src/common/src/mem_arena.cpp
index 13cd00fd3..291103be7 100644
--- a/src/common/src/mem_arena.cpp
+++ b/src/common/src/mem_arena.cpp
@@ -163,14 +163,6 @@ u8* MemArena::Find4GBBase()
}
-// yeah, this could also be done in like two bitwise ops...
-#define SKIP(a_flags, b_flags) \
- if (!(a_flags & MV_WII_ONLY) && (b_flags & MV_WII_ONLY)) \
- continue; \
- if (!(a_flags & MV_FAKE_VMEM) && (b_flags & MV_FAKE_VMEM)) \
- continue; \
-
-
static bool Memory_TryBase(u8 *base, const MemoryView *views, int num_views, u32 flags, MemArena *arena) {
// OK, we know where to find free space. Now grab it!
// We just mimic the popular BAT setup.
@@ -189,7 +181,6 @@ static bool Memory_TryBase(u8 *base, const MemoryView *views, int num_views, u32
int i;
for (i = 0; i < num_views; i++)
{
- SKIP(flags, views[i].flags);
if (views[i].flags & MV_MIRROR_PREVIOUS) {
position = last_position;
} else {
@@ -230,7 +221,6 @@ u8 *MemoryMap_Setup(const MemoryView *views, int num_views, u32 flags, MemArena
for (int i = 0; i < num_views; i++)
{
- SKIP(flags, views[i].flags);
if ((views[i].flags & MV_MIRROR_PREVIOUS) == 0)
total_mem += views[i].size;
}
diff --git a/src/common/src/mem_arena.h b/src/common/src/mem_arena.h
index 4c3ded0df..3c14756db 100644
--- a/src/common/src/mem_arena.h
+++ b/src/common/src/mem_arena.h
@@ -37,8 +37,7 @@ private:
enum {
MV_MIRROR_PREVIOUS = 1,
- MV_FAKE_VMEM = 2,
- MV_WII_ONLY = 4,
+ MV_IS_PRIMARY_RAM = 0x100,
};
struct MemoryView
diff --git a/src/core/src/mem_map.cpp b/src/core/src/mem_map.cpp
index 3ff516cbd..e649da91b 100644
--- a/src/core/src/mem_map.cpp
+++ b/src/core/src/mem_map.cpp
@@ -22,10 +22,41 @@
* http://code.google.com/p/gekko-gc-emu/
*/
+#include "common.h"
+#include "mem_arena.h"
+
#include "mem_map.h"
+#include "core.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
namespace Memory {
+
+u8* g_mem_base = NULL; ///< The base pointer to the auto-mirrored arena.
+
+MemArena g_mem_arena; ///< The MemArena class
+
+u8* g_fcram = NULL; ///< Main memory (FCRAM) pointer
+u8* g_vram = NULL; ///< Video memory (VRAM) pointer
+
+u8* g_physical_fcram = NULL; ///< Main physical memory (FCRAM)
+u8* g_physical_vram = NULL; ///< Video physical memory (VRAM)
+
+// We don't declare the IO region in here since its handled by other means.
+static MemoryView g_mem_views[] =
+{
+ {NULL, NULL, 0x00000000, MEM_BOOTROM_SIZE, 0},
+ {NULL, NULL, 0x00010000, MEM_BOOTROM_SIZE, MV_MIRROR_PREVIOUS},
+ {NULL, NULL, 0x17E00000, MEM_MPCORE_PRIV_SIZE, 0},
+ {&g_vram, &g_physical_vram, 0x18000000, MEM_VRAM_SIZE, 0},
+ {NULL, NULL, 0x1FF00000, MEM_DSP_SIZE, 0},
+ {NULL, NULL, 0x1FF80000, MEM_AXI_WRAM_SIZE, 0},
+ {&g_ram, &g_physical_fcram, 0x20000000, MEM_FCRAM_SIZE, MV_IS_PRIMARY_RAM},
+};
+
+static const int kNumMemViews = sizeof(g_mem_views) / sizeof(MemoryView); ///< Number of mem views
+
u8 Read8(const u32 addr) {
return 0xDE;
}
@@ -47,6 +78,27 @@ void Write16(const u32 addr, const u32 data) {
void Write32(const u32 addr, const u32 data) {
}
+void Init() {
+ int flags = 0;
+
+ for (size_t i = 0; i < ARRAY_SIZE(g_mem_views); i++) {
+ if (g_mem_views[i].flags & MV_IS_PRIMARY_RAM)
+ g_mem_views[i].size = MEMORY_SIZE;
+ }
+ g_base = MemoryMap_Setup(g_mem_views, kNumMemViews, flags, &g_mem_arena);
+
+ INFO_LOG(MEMMAP, "Memory system initialized. RAM at %p (mirror at 0 @ %p)", g_fcram,
+ g_physical_fcram);
+}
+
+void Shutdown() {
+ u32 flags = 0;
+ MemoryMap_Shutdown(g_mem_views, kNumMemViews, flags, &g_mem_arena);
+ g_mem_arena.ReleaseSpace();
+ g_mem_base = NULL;
+ INFO_LOG(MEMMAP, "Memory system shut down.");
+}
+
} // namespace
diff --git a/src/core/src/mem_map.h b/src/core/src/mem_map.h
index 8ef6e58a2..3251fc416 100644
--- a/src/core/src/mem_map.h
+++ b/src/core/src/mem_map.h
@@ -32,13 +32,34 @@
////////////////////////////////////////////////////////////////////////////////////////////////////
+#define MEM_BOOTROM_SIZE 0x00010000 ///< Bootrom (super secret code/data @ 0x8000) size
+#define MEM_MPCORE_PRIV_SIZE 0x00002000 ///< MPCore private memory region size
+#define MEM_VRAM_SIZE 0x00600000 ///< VRAM size
+#define MEM_DSP_SIZE 0x00080000 ///< DSP memory size
+#define MEM_AXI_WRAM_SIZE 0x00080000 ///< AXI WRAM size
+#define MEM_FCRAM_SIZE 0x08000000 ///< FCRAM size
+
+#define MEMORY_SIZE MEM_FCRAM_SIZE
+#define MEMORY_MASK (MEM_FCRAM_SIZE - 1) ///< Main memory mask
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
namespace Memory {
-extern u8* g_ram;
-extern u8* g_vram;
+// 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;
-extern u32 g_memory_size;
-extern u32 g_memory_mask;
+// 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_ram; ///< Main memory
+extern u8* g_vram; ///< Video memory (VRAM)
void Init();
void Shutdown();