aboutsummaryrefslogtreecommitdiff
path: root/source
diff options
context:
space:
mode:
Diffstat (limited to 'source')
-rw-r--r--source/memmap.cpp87
-rw-r--r--source/nds/dma_adj.h1
2 files changed, 80 insertions, 8 deletions
diff --git a/source/memmap.cpp b/source/memmap.cpp
index 755f7a0..20110f9 100644
--- a/source/memmap.cpp
+++ b/source/memmap.cpp
@@ -113,6 +113,12 @@
#include "unzip/unzip.h"
+#ifdef DS2_DMA
+#include "ds2_cpu.h"
+#include "ds2_dma.h"
+#include "dma_adj.h"
+#endif
+
#ifdef __W32_HEAP
#include <malloc.h>
#endif
@@ -414,7 +420,11 @@ bool8 CMemory::Init ()
RAM = (uint8 *) malloc (0x20000);
SRAM = (uint8 *) malloc (0x20000);
VRAM = (uint8 *) malloc (0x10000);
+#ifdef DS2_DMA
+ ROM = (uint8 *) AlignedMalloc (MAX_ROM_SIZE + 0x200 + 0x8000, 32, &PtrAdj.ROM);
+#else
ROM = (uint8 *) malloc (MAX_ROM_SIZE + 0x200 + 0x8000);
+#endif
memset (RAM, 0, 0x20000);
memset (SRAM, 0, 0x20000);
memset (VRAM, 0, 0x10000);
@@ -451,9 +461,9 @@ bool8 CMemory::Init ()
// Add 0x8000 to ROM image pointer to stop SuperFX code accessing
// unallocated memory (can cause crash on some ports).
- ROM += 0x8000;
+ ROM += 0x8000; // still 32-byte aligned
- C4RAM = ROM + 0x400000 + 8192 * 8;
+ C4RAM = ROM + 0x400000 + 8192 * 8; // still 32-byte aligned
::ROM = ROM;
::SRAM = SRAM;
::RegRAM = FillRAM;
@@ -468,7 +478,6 @@ bool8 CMemory::Init ()
SuperFX.pvRom = (uint8 *) ROM;
#endif
- // DS2 DMA notes: Can this be sped up with DMA from a block of zeroes? [Neb]
ZeroMemory (IPPU.TileCache [TILE_2BIT], MAX_2BIT_TILES * 128);
ZeroMemory (IPPU.TileCache [TILE_4BIT], MAX_4BIT_TILES * 128);
ZeroMemory (IPPU.TileCache [TILE_8BIT], MAX_8BIT_TILES * 128);
@@ -508,7 +517,11 @@ void CMemory::Deinit ()
if (ROM)
{
ROM -= 0x8000;
+#ifdef DS2_RAM
+ AlignedFree ((char *) ROM, PtrAdj.ROM);
+#else
free ((char *) ROM);
+#endif
ROM = NULL;
}
@@ -642,9 +655,21 @@ again:
((hi_score > lo_score && ScoreHiROM (TRUE) > hi_score) ||
(hi_score <= lo_score && ScoreLoROM (TRUE) > lo_score)))
{
+#ifdef DS2_DMA
+ __dcache_writeback_all();
+ {
+ unsigned int i;
+ for (i = 0; i < TotalFileSize; i += 512)
+ {
+ ds2_DMAcopy_32Byte (2 /* channel: emu internal */, Memory.ROM + i, Memory.ROM + i + 512, 512);
+ ds2_DMA_wait(2);
+ ds2_DMA_stop(2);
+ }
+ }
+#else
// memmove required: Overlapping addresses [Neb]
- // DS2 DMA notes: Can be split into 512-byte DMA blocks [Neb]
memmove (Memory.ROM, Memory.ROM + 512, TotalFileSize - 512);
+#endif
TotalFileSize -= 512;
S9xMessage (S9X_INFO, S9X_HEADER_WARNING,
"Try specifying the -nhd command line option if the game doesn't work\n");
@@ -653,7 +678,7 @@ again:
orig_lo_score = lo_score = ScoreLoROM (FALSE);
}
- CalculatedSize = (TotalFileSize / 0x2000) * 0x2000;
+ CalculatedSize = TotalFileSize & ~0x1FFF; // round down to lower 0x2000
ZeroMemory (ROM + CalculatedSize, MAX_ROM_SIZE - CalculatedSize);
if(CalculatedSize >0x400000&&
@@ -961,7 +986,20 @@ uint32 CMemory::FileLoader (uint8* buffer, const char* filename, int32 maxsize)
{
// memmove required: Overlapping addresses [Neb]
// DS2 DMA notes: Can be split into 512-byte DMA blocks [Neb]
+#ifdef DS2_DMA
+ __dcache_writeback_all();
+ {
+ unsigned int i;
+ for (i = 0; i < calc_size; i += 512)
+ {
+ ds2_DMAcopy_32Byte (2 /* channel: emu internal */, ptr + i, ptr + i + 512, 512);
+ ds2_DMA_wait(2);
+ ds2_DMA_stop(2);
+ }
+ }
+#else
memmove (ptr, ptr + 512, calc_size);
+#endif
HeaderCount++;
FileSize -= 512;
}
@@ -1203,25 +1241,47 @@ void S9xDeinterleaveType2 (bool8 reset)
((i & 12) >> 2);
}
- // DS2 DMA notes: ROM needs to be 32-byte aligned [Neb]
+#ifdef DS2_DMA
+ unsigned int TmpAdj;
+ uint8 *tmp = (uint8 *) AlignedMalloc (0x10000, 32, &TmpAdj);
+#else
uint8 *tmp = (uint8 *) malloc (0x10000);
+#endif
if (tmp)
{
+#ifdef DS2_DMA
+ __dcache_writeback_all();
+#endif
for (i = 0; i < nblocks * 2; i++)
{
for (int j = i; j < nblocks * 2; j++)
{
if (blocks [j] == i)
{
+#ifdef DS2_DMA
+ ds2_DMAcopy_32Byte (2 /* channel: emu internal */, tmp, &Memory.ROM [blocks [j] * 0x10000], 0x10000);
+ ds2_DMA_wait(2);
+ ds2_DMA_stop(2);
+
+ ds2_DMAcopy_32Byte (2 /* channel: emu internal */, &Memory.ROM [blocks [j] * 0x10000],
+ &Memory.ROM [blocks [i] * 0x10000], 0x10000);
+ ds2_DMA_wait(2);
+ ds2_DMA_stop(2);
+
+ ds2_DMAcopy_32Byte (2 /* channel: emu internal */, &Memory.ROM [blocks [i] * 0x10000], tmp, 0x10000);
+ ds2_DMA_wait(2);
+ ds2_DMA_stop(2);
+#else
// memmove converted: Different mallocs [Neb]
memcpy (tmp, &Memory.ROM [blocks [j] * 0x10000], 0x10000);
+
// memmove converted: Different addresses, or identical if blocks[i] == blocks[j] [Neb]
- // DS2 DMA notes: Don't do DMA at all if blocks[i] == blocks[j] [Neb]
memcpy (&Memory.ROM [blocks [j] * 0x10000],
&Memory.ROM [blocks [i] * 0x10000], 0x10000);
// memmove converted: Different mallocs [Neb]
memcpy (&Memory.ROM [blocks [i] * 0x10000], tmp, 0x10000);
+#endif
uint8 b = blocks [j];
blocks [j] = blocks [i];
blocks [i] = b;
@@ -1633,7 +1693,6 @@ bool8 CMemory::LoadSRAM (const char *filename)
{
// S-RAM file has a header - remove it
// memmove required: Overlapping addresses [Neb]
- // DS2 DMA notes: Can be split into 512-byte DMA blocks [Neb]
memmove (::SRAM, ::SRAM + 512, size);
}
if (len == size + SRTC_SRAM_PAD)
@@ -2573,12 +2632,24 @@ void CMemory::SuperFXROMMap ()
// Replicate the first 2Mb of the ROM at ROM + 2MB such that each 32K
// block is repeated twice in each 64K block.
+#ifdef DS2_DMA
+ __dcache_writeback_all();
+#endif
for (c = 0; c < 64; c++)
{
+#ifdef DS2_DMA
+ ds2_DMAcopy_32Byte(2 /* channel: emu internal */, &ROM [0x200000 + c * 0x10000], &ROM [c * 0x8000], 0x8000);
+ ds2_DMAcopy_32Byte(3 /* channel: emu internal 2 */, &ROM [0x208000 + c * 0x10000], &ROM [c * 0x8000], 0x8000);
+ ds2_DMA_wait(2);
+ ds2_DMA_wait(3);
+ ds2_DMA_stop(2);
+ ds2_DMA_stop(3);
+#else
// memmove converted: Different addresses [Neb]
memcpy (&ROM [0x200000 + c * 0x10000], &ROM [c * 0x8000], 0x8000);
// memmove converted: Different addresses [Neb]
memcpy (&ROM [0x208000 + c * 0x10000], &ROM [c * 0x8000], 0x8000);
+#endif
}
WriteProtectROM ();
diff --git a/source/nds/dma_adj.h b/source/nds/dma_adj.h
index dd4a6e4..3852f09 100644
--- a/source/nds/dma_adj.h
+++ b/source/nds/dma_adj.h
@@ -12,6 +12,7 @@ struct SPointerAdjustments {
unsigned int GFXScreen;
/* These are used by Snes9x. */
+ unsigned int ROM;
};
extern struct SPointerAdjustments PtrAdj;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 08:45:44 +0000