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Merge pull request #725 from yuriks/remove-common-crap 

Remove unused hash and mem_arena from common
This commit is contained in:
Yuri Kunde Schlesner 2015-05-07 16:18:03 -07:00
parent 10ef39624a 3396f352cb
commit 4560178f66
7 changed files with 31 additions and 1103 deletions
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4
src/common/CMakeLists.txt
View File

@ -5,13 +5,11 @@ set(SRCS
break_points.cpp
emu_window.cpp
file_util.cpp
hash.cpp
key_map.cpp
logging/filter.cpp
logging/text_formatter.cpp
logging/backend.cpp
math_util.cpp
mem_arena.cpp
memory_util.cpp
misc.cpp
profiler.cpp
@ -36,7 +34,6 @@ set(HEADERS
emu_window.h
fifo_queue.h
file_util.h
hash.h
key_map.h
linear_disk_cache.h
logging/text_formatter.h
@ -45,7 +42,6 @@ set(HEADERS
logging/backend.h
make_unique.h
math_util.h
mem_arena.h
memory_util.h
platform.h
profiler.h

524
src/common/hash.cpp
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@ -1,524 +0,0 @@
// Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include "common/common_funcs.h" // For rotl
#include "common/hash.h"
#include "common/platform.h"
#if _M_SSE >= 0x402
#include "common/cpu_detect.h"
#include <nmmintrin.h>
#endif
static u64 (*ptrHashFunction)(const u8 *src, int len, u32 samples) = &GetMurmurHash3;
// uint32_t
// WARNING - may read one more byte!
// Implementation from Wikipedia.
u32 HashFletcher(const u8* data_u8, size_t length)
{
const u16* data = (const u16*)data_u8; /* Pointer to the data to be summed */
size_t len = (length + 1) / 2; /* Length in 16-bit words */
u32 sum1 = 0xffff, sum2 = 0xffff;
while (len)
{
size_t tlen = len > 360 ? 360 : len;
len -= tlen;
do {
sum1 += *data++;
sum2 += sum1;
}
while (--tlen);
sum1 = (sum1 & 0xffff) + (sum1 >> 16);
sum2 = (sum2 & 0xffff) + (sum2 >> 16);
}
// Second reduction step to reduce sums to 16 bits
sum1 = (sum1 & 0xffff) + (sum1 >> 16);
sum2 = (sum2 & 0xffff) + (sum2 >> 16);
return(sum2 << 16 | sum1);
}
// Implementation from Wikipedia
// Slightly slower than Fletcher above, but slightly more reliable.
#define MOD_ADLER 65521
// data: Pointer to the data to be summed; len is in bytes
u32 HashAdler32(const u8* data, size_t len)
{
u32 a = 1, b = 0;
while (len)
{
size_t tlen = len > 5550 ? 5550 : len;
len -= tlen;
do
{
a += *data++;
b += a;
}
while (--tlen);
a = (a & 0xffff) + (a >> 16) * (65536 - MOD_ADLER);
b = (b & 0xffff) + (b >> 16) * (65536 - MOD_ADLER);
}
// It can be shown that a <= 0x1013a here, so a single subtract will do.
if (a >= MOD_ADLER)
{
a -= MOD_ADLER;
}
// It can be shown that b can reach 0xfff87 here.
b = (b & 0xffff) + (b >> 16) * (65536 - MOD_ADLER);
if (b >= MOD_ADLER)
{
b -= MOD_ADLER;
}
return((b << 16) | a);
}
// Stupid hash - but can't go back now :)
// Don't use for new things. At least it's reasonably fast.
u32 HashEctor(const u8* ptr, int length)
{
u32 crc = 0;
for (int i = 0; i < length; i++)
{
crc ^= ptr[i];
crc = (crc << 3) | (crc >> 29);
}
return(crc);
}
#if EMU_ARCH_BITS == 64
//-----------------------------------------------------------------------------
// Block read - if your platform needs to do endian-swapping or can only
// handle aligned reads, do the conversion here
inline u64 getblock(const u64 * p, int i)
{
return p[i];
}
//----------
// Block mix - combine the key bits with the hash bits and scramble everything
inline void bmix64(u64 & h1, u64 & h2, u64 & k1, u64 & k2, u64 & c1, u64 & c2)
{
k1 *= c1;
k1 = _rotl64(k1,23);
k1 *= c2;
h1 ^= k1;
h1 += h2;
h2 = _rotl64(h2,41);
k2 *= c2;
k2 = _rotl64(k2,23);
k2 *= c1;
h2 ^= k2;
h2 += h1;
h1 = h1*3+0x52dce729;
h2 = h2*3+0x38495ab5;
c1 = c1*5+0x7b7d159c;
c2 = c2*5+0x6bce6396;
}
//----------
// Finalization mix - avalanches all bits to within 0.05% bias
inline u64 fmix64(u64 k)
{
k ^= k >> 33;
k *= 0xff51afd7ed558ccd;
k ^= k >> 33;
k *= 0xc4ceb9fe1a85ec53;
k ^= k >> 33;
return k;
}
u64 GetMurmurHash3(const u8 *src, int len, u32 samples)
{
const u8 * data = (const u8*)src;
const int nblocks = len / 16;
u32 Step = (len / 8);
if(samples == 0) samples = std::max(Step, 1u);
Step = Step / samples;
if(Step < 1) Step = 1;
u64 h1 = 0x9368e53c2f6af274;
u64 h2 = 0x586dcd208f7cd3fd;
u64 c1 = 0x87c37b91114253d5;
u64 c2 = 0x4cf5ad432745937f;
//----------
// body
const u64 * blocks = (const u64 *)(data);
for(int i = 0; i < nblocks; i+=Step)
{
u64 k1 = getblock(blocks,i*2+0);
u64 k2 = getblock(blocks,i*2+1);
bmix64(h1,h2,k1,k2,c1,c2);
}
//----------
// tail
const u8 * tail = (const u8*)(data + nblocks*16);
u64 k1 = 0;
u64 k2 = 0;
switch(len & 15)
{
case 15: k2 ^= u64(tail[14]) << 48;
case 14: k2 ^= u64(tail[13]) << 40;
case 13: k2 ^= u64(tail[12]) << 32;
case 12: k2 ^= u64(tail[11]) << 24;
case 11: k2 ^= u64(tail[10]) << 16;
case 10: k2 ^= u64(tail[ 9]) << 8;
case 9: k2 ^= u64(tail[ 8]) << 0;
case 8: k1 ^= u64(tail[ 7]) << 56;
case 7: k1 ^= u64(tail[ 6]) << 48;
case 6: k1 ^= u64(tail[ 5]) << 40;
case 5: k1 ^= u64(tail[ 4]) << 32;
case 4: k1 ^= u64(tail[ 3]) << 24;
case 3: k1 ^= u64(tail[ 2]) << 16;
case 2: k1 ^= u64(tail[ 1]) << 8;
case 1: k1 ^= u64(tail[ 0]) << 0;
bmix64(h1,h2,k1,k2,c1,c2);
};
//----------
// finalization
h2 ^= len;
h1 += h2;
h2 += h1;
h1 = fmix64(h1);
h2 = fmix64(h2);
h1 += h2;
return h1;
}
// CRC32 hash using the SSE4.2 instruction
u64 GetCRC32(const u8 *src, int len, u32 samples)
{
#if _M_SSE >= 0x402
u64 h = len;
u32 Step = (len / 8);
const u64 *data = (const u64 *)src;
const u64 *end = data + Step;
if(samples == 0) samples = std::max(Step, 1u);
Step = Step / samples;
if(Step < 1) Step = 1;
while(data < end)
{
h = _mm_crc32_u64(h, data[0]);
data += Step;
}
const u8 *data2 = (const u8*)end;
return _mm_crc32_u64(h, u64(data2[0]));
#else
return 0;
#endif
}
/*
* NOTE: This hash function is used for custom texture loading/dumping, so
* it should not be changed, which would require all custom textures to be
* recalculated for their new hash values. If the hashing function is
* changed, make sure this one is still used when the legacy parameter is
* true.
*/
u64 GetHashHiresTexture(const u8 *src, int len, u32 samples)
{
const u64 m = 0xc6a4a7935bd1e995;
u64 h = len * m;
const int r = 47;
u32 Step = (len / 8);
const u64 *data = (const u64 *)src;
const u64 *end = data + Step;
if(samples == 0) samples = std::max(Step, 1u);
Step = Step / samples;
if(Step < 1) Step = 1;
while(data < end)
{
u64 k = data[0];
data+=Step;
k *= m;
k ^= k >> r;
k *= m;
h ^= k;
h *= m;
}
const u8 * data2 = (const u8*)end;
switch(len & 7)
{
case 7: h ^= u64(data2[6]) << 48;
case 6: h ^= u64(data2[5]) << 40;
case 5: h ^= u64(data2[4]) << 32;
case 4: h ^= u64(data2[3]) << 24;
case 3: h ^= u64(data2[2]) << 16;
case 2: h ^= u64(data2[1]) << 8;
case 1: h ^= u64(data2[0]);
h *= m;
};
h ^= h >> r;
h *= m;
h ^= h >> r;
return h;
}
#else
// CRC32 hash using the SSE4.2 instruction
u64 GetCRC32(const u8 *src, int len, u32 samples)
{
#if _M_SSE >= 0x402
u32 h = len;
u32 Step = (len/4);
const u32 *data = (const u32 *)src;
const u32 *end = data + Step;
if(samples == 0) samples = std::max(Step, 1u);
Step = Step / samples;
if(Step < 1) Step = 1;
while(data < end)
{
h = _mm_crc32_u32(h, data[0]);
data += Step;
}
const u8 *data2 = (const u8*)end;
return (u64)_mm_crc32_u32(h, u32(data2[0]));
#else
return 0;
#endif
}
//-----------------------------------------------------------------------------
// Block read - if your platform needs to do endian-swapping or can only
// handle aligned reads, do the conversion here
inline u32 getblock(const u32 * p, int i)
{
return p[i];
}
//----------
// Finalization mix - force all bits of a hash block to avalanche
// avalanches all bits to within 0.25% bias
inline u32 fmix32(u32 h)
{
h ^= h >> 16;
h *= 0x85ebca6b;
h ^= h >> 13;
h *= 0xc2b2ae35;
h ^= h >> 16;
return h;
}
inline void bmix32(u32 & h1, u32 & h2, u32 & k1, u32 & k2, u32 & c1, u32 & c2)
{
k1 *= c1;
k1 = _rotl(k1,11);
k1 *= c2;
h1 ^= k1;
h1 += h2;
h2 = _rotl(h2,17);
k2 *= c2;
k2 = _rotl(k2,11);
k2 *= c1;
h2 ^= k2;
h2 += h1;
h1 = h1*3+0x52dce729;
h2 = h2*3+0x38495ab5;
c1 = c1*5+0x7b7d159c;
c2 = c2*5+0x6bce6396;
}
//----------
u64 GetMurmurHash3(const u8* src, int len, u32 samples)
{
const u8 * data = (const u8*)src;
u32 out[2];
const int nblocks = len / 8;
u32 Step = (len / 4);
if(samples == 0) samples = std::max(Step, 1u);
Step = Step / samples;
if(Step < 1) Step = 1;
u32 h1 = 0x8de1c3ac;
u32 h2 = 0xbab98226;
u32 c1 = 0x95543787;
u32 c2 = 0x2ad7eb25;
//----------
// body
const u32 * blocks = (const u32 *)(data + nblocks*8);
for(int i = -nblocks; i < 0; i+=Step)
{
u32 k1 = getblock(blocks,i*2+0);
u32 k2 = getblock(blocks,i*2+1);
bmix32(h1,h2,k1,k2,c1,c2);
}
//----------
// tail
const u8 * tail = (const u8*)(data + nblocks*8);
u32 k1 = 0;
u32 k2 = 0;
switch(len & 7)
{
case 7: k2 ^= tail[6] << 16;
case 6: k2 ^= tail[5] << 8;
case 5: k2 ^= tail[4] << 0;
case 4: k1 ^= tail[3] << 24;
case 3: k1 ^= tail[2] << 16;
case 2: k1 ^= tail[1] << 8;
case 1: k1 ^= tail[0] << 0;
bmix32(h1,h2,k1,k2,c1,c2);
};
//----------
// finalization
h2 ^= len;
h1 += h2;
h2 += h1;
h1 = fmix32(h1);
h2 = fmix32(h2);
h1 += h2;
h2 += h1;
out[0] = h1;
out[1] = h2;
return *((u64 *)&out);
}
/*
* FIXME: The old 32-bit version of this hash made different hashes than the
* 64-bit version. Until someone can make a new version of the 32-bit one that
* makes identical hashes, this is just a c/p of the 64-bit one.
*/
u64 GetHashHiresTexture(const u8 *src, int len, u32 samples)
{
const u64 m = 0xc6a4a7935bd1e995ULL;
u64 h = len * m;
const int r = 47;
u32 Step = (len / 8);
const u64 *data = (const u64 *)src;
const u64 *end = data + Step;
if(samples == 0) samples = std::max(Step, 1u);
Step = Step / samples;
if(Step < 1) Step = 1;
while(data < end)
{
u64 k = data[0];
data+=Step;
k *= m;
k ^= k >> r;
k *= m;
h ^= k;
h *= m;
}
const u8 * data2 = (const u8*)end;
switch(len & 7)
{
case 7: h ^= u64(data2[6]) << 48;
case 6: h ^= u64(data2[5]) << 40;
case 5: h ^= u64(data2[4]) << 32;
case 4: h ^= u64(data2[3]) << 24;
case 3: h ^= u64(data2[2]) << 16;
case 2: h ^= u64(data2[1]) << 8;
case 1: h ^= u64(data2[0]);
h *= m;
};
h ^= h >> r;
h *= m;
h ^= h >> r;
return h;
}
#endif
u64 GetHash64(const u8 *src, int len, u32 samples)
{
return ptrHashFunction(src, len, samples);
}
// sets the hash function used for the texture cache
void SetHash64Function(bool useHiresTextures)
{
if (useHiresTextures)
{
ptrHashFunction = &GetHashHiresTexture;
}
#if _M_SSE >= 0x402
else if (cpu_info.bSSE4_2 && !useHiresTextures) // sse crc32 version
{
ptrHashFunction = &GetCRC32;
}
#endif
else
{
ptrHashFunction = &GetMurmurHash3;
}
}

17
src/common/hash.h
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@ -1,17 +0,0 @@
// Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include "common/common_types.h"
u32 HashFletcher(const u8* data_u8, size_t length); // FAST. Length & 1 == 0.
u32 HashAdler32(const u8* data, size_t len); // Fairly accurate, slightly slower
u32 HashFNV(const u8* ptr, int length); // Another fast and decent hash
u32 HashEctor(const u8* ptr, int length); // JUNK. DO NOT USE FOR NEW THINGS
u64 GetCRC32(const u8 *src, int len, u32 samples); // SSE4.2 version of CRC32
u64 GetHashHiresTexture(const u8 *src, int len, u32 samples);
u64 GetMurmurHash3(const u8 *src, int len, u32 samples);
u64 GetHash64(const u8 *src, int len, u32 samples);
void SetHash64Function(bool useHiresTextures);

394
src/common/mem_arena.cpp
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@ -1,394 +0,0 @@
// Copyright (C) 2003 Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0 or later versions.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#include <string>
#include "common/logging/log.h"
#include "common/mem_arena.h"
#include "common/memory_util.h"
#include "common/platform.h"
#include "common/string_util.h"
#ifndef _WIN32
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#ifdef ANDROID
#include <sys/ioctl.h>
#include <linux/ashmem.h>
#endif
#endif
#ifdef ANDROID
// Hopefully this ABI will never change...
#define ASHMEM_DEVICE "/dev/ashmem"
/*
* ashmem_create_region - creates a new ashmem region and returns the file
* descriptor, or <0 on error
*
* `name' is an optional label to give the region (visible in /proc/pid/maps)
* `size' is the size of the region, in page-aligned bytes
*/
int ashmem_create_region(const char *name, size_t size)
{
int fd, ret;
fd = open(ASHMEM_DEVICE, O_RDWR);
if (fd < 0)
return fd;
if (name) {
char buf[ASHMEM_NAME_LEN];
strncpy(buf, name, sizeof(buf));
ret = ioctl(fd, ASHMEM_SET_NAME, buf);
if (ret < 0)
goto error;
}
ret = ioctl(fd, ASHMEM_SET_SIZE, size);
if (ret < 0)
goto error;
return fd;
error:
LOG_ERROR(Common_Memory, "NASTY ASHMEM ERROR: ret = %08x", ret);
close(fd);
return ret;
}
int ashmem_set_prot_region(int fd, int prot)
{
return ioctl(fd, ASHMEM_SET_PROT_MASK, prot);
}
int ashmem_pin_region(int fd, size_t offset, size_t len)
{
struct ashmem_pin pin = { offset, len };
return ioctl(fd, ASHMEM_PIN, &pin);
}
int ashmem_unpin_region(int fd, size_t offset, size_t len)
{
struct ashmem_pin pin = { offset, len };
return ioctl(fd, ASHMEM_UNPIN, &pin);
}
#endif // Android
#if defined(_WIN32)
SYSTEM_INFO sysInfo;
#endif
// Windows mappings need to be on 64K boundaries, due to Alpha legacy.
#ifdef _WIN32
size_t roundup(size_t x) {
int gran = sysInfo.dwAllocationGranularity ? sysInfo.dwAllocationGranularity : 0x10000;
return (x + gran - 1) & ~(gran - 1);
}
#else
size_t roundup(size_t x) {
return x;
}
#endif
void MemArena::GrabLowMemSpace(size_t size)
{
#ifdef _WIN32
hMemoryMapping = CreateFileMapping(INVALID_HANDLE_VALUE, nullptr, PAGE_READWRITE, 0, (DWORD)(size), nullptr);
GetSystemInfo(&sysInfo);
#elif defined(ANDROID)
// Use ashmem so we don't have to allocate a file on disk!
fd = ashmem_create_region("Citra_RAM", size);
// Note that it appears that ashmem is pinned by default, so no need to pin.
if (fd < 0)
{
LOG_ERROR(Common_Memory, "Failed to grab ashmem space of size: %08x errno: %d", (int)size, (int)(errno));
return;
}
#else
// Try to find a non-existing filename for our shared memory.
// In most cases the first one will be available, but it's nicer to search
// a bit more.
for (int i = 0; i < 10000; i++)
{
std::string file_name = Common::StringFromFormat("/citramem.%d", i);
fd = shm_open(file_name.c_str(), O_RDWR | O_CREAT | O_EXCL, 0600);
if (fd != -1)
{
shm_unlink(file_name.c_str());
break;
}
else if (errno != EEXIST)
{
LOG_ERROR(Common_Memory, "shm_open failed: %s", strerror(errno));
return;
}
}
if (ftruncate(fd, size) < 0)
LOG_ERROR(Common_Memory, "Failed to allocate low memory space");
#endif
}
void MemArena::ReleaseSpace()
{
#ifdef _WIN32
CloseHandle(hMemoryMapping);
hMemoryMapping = 0;
#else
close(fd);
#endif
}
void *MemArena::CreateView(s64 offset, size_t size, void *base)
{
#ifdef _WIN32
size = roundup(size);
void *ptr = MapViewOfFileEx(hMemoryMapping, FILE_MAP_ALL_ACCESS, 0, (DWORD)((u64)offset), size, base);
return ptr;
#else
void *retval = mmap(base, size, PROT_READ | PROT_WRITE, MAP_SHARED |
// Do not sync memory to underlying file. Linux has this by default.
#ifdef __FreeBSD__
MAP_NOSYNC |
#endif
((base == nullptr) ? 0 : MAP_FIXED), fd, offset);
if (retval == MAP_FAILED)
{
LOG_ERROR(Common_Memory, "mmap failed");
return nullptr;
}
return retval;
#endif
}
void MemArena::ReleaseView(void* view, size_t size)
{
#ifdef _WIN32
UnmapViewOfFile(view);
#else
munmap(view, size);
#endif
}
u8* MemArena::Find4GBBase()
{
#if EMU_ARCH_BITS == 64
#ifdef _WIN32
// 64 bit
u8* base = (u8*)VirtualAlloc(0, 0xE1000000, MEM_RESERVE, PAGE_READWRITE);
VirtualFree(base, 0, MEM_RELEASE);
return base;
#else
// Very precarious - mmap cannot return an error when trying to map already used pages.
// This makes the Windows approach above unusable on Linux, so we will simply pray...
return reinterpret_cast<u8*>(0x2300000000ULL);
#endif
#else // 32 bit
#ifdef _WIN32
u8* base = (u8*)VirtualAlloc(0, 0x10000000, MEM_RESERVE, PAGE_READWRITE);
if (base) {
VirtualFree(base, 0, MEM_RELEASE);
}
return base;
#else
void* base = mmap(0, 0x10000000, PROT_READ | PROT_WRITE,
MAP_ANON | MAP_SHARED, -1, 0);
if (base == MAP_FAILED) {
LOG_ERROR(Common_Memory, "Failed to map 256 MB of memory space: %s", strerror(errno));
return 0;
}
munmap(base, 0x10000000);
return static_cast<u8*>(base);
#endif
#endif
}
// 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.
size_t position = 0;
size_t last_position = 0;
// Zero all the pointers to be sure.
for (int i = 0; i < num_views; i++)
{
if (views[i].out_ptr_low)
*views[i].out_ptr_low = 0;
if (views[i].out_ptr)
*views[i].out_ptr = 0;
}
int i;
for (i = 0; i < num_views; i++)
{
const MemoryView &view = views[i];
if (view.size == 0)
continue;
SKIP(flags, view.flags);
if (view.flags & MV_MIRROR_PREVIOUS) {
position = last_position;
}
else {
*(view.out_ptr_low) = (u8*)arena->CreateView(position, view.size);
if (!*view.out_ptr_low)
goto bail;
}
#if EMU_ARCH_BITS == 64
*view.out_ptr = (u8*)arena->CreateView(
position, view.size, base + view.virtual_address);
#else
if (view.flags & MV_MIRROR_PREVIOUS) { // TODO: should check if the two & 0x3FFFFFFF are identical.
// No need to create multiple identical views.
*view.out_ptr = *views[i - 1].out_ptr;
}
else {
*view.out_ptr = (u8*)arena->CreateView(
position, view.size, base + (view.virtual_address & 0x3FFFFFFF));
if (!*view.out_ptr)
goto bail;
}
#endif
last_position = position;
position += roundup(view.size);
}
return true;
bail:
// Argh! ERROR! Free what we grabbed so far so we can try again.
for (int j = 0; j <= i; j++)
{
if (views[i].size == 0)
continue;
SKIP(flags, views[i].flags);
if (views[j].out_ptr_low && *views[j].out_ptr_low)
{
arena->ReleaseView(*views[j].out_ptr_low, views[j].size);
*views[j].out_ptr_low = nullptr;
}
if (*views[j].out_ptr)
{
#if EMU_ARCH_BITS == 64
arena->ReleaseView(*views[j].out_ptr, views[j].size);
#else
if (!(views[j].flags & MV_MIRROR_PREVIOUS))
{
arena->ReleaseView(*views[j].out_ptr, views[j].size);
}
#endif
*views[j].out_ptr = nullptr;
}
}
return false;
}
u8 *MemoryMap_Setup(const MemoryView *views, int num_views, u32 flags, MemArena *arena)
{
size_t total_mem = 0;
int base_attempts = 0;
for (int i = 0; i < num_views; i++)
{
if (views[i].size == 0)
continue;
SKIP(flags, views[i].flags);
if ((views[i].flags & MV_MIRROR_PREVIOUS) == 0)
total_mem += roundup(views[i].size);
}
// Grab some pagefile backed memory out of the void ...
arena->GrabLowMemSpace(total_mem);
// Now, create views in high memory where there's plenty of space.
#if EMU_ARCH_BITS == 64
u8 *base = MemArena::Find4GBBase();
// This really shouldn't fail - in 64-bit, there will always be enough
// address space.
if (!Memory_TryBase(base, views, num_views, flags, arena))
{
LOG_ERROR(Common_Memory, "MemoryMap_Setup: Failed finding a memory base.");
return 0;
}
#elif defined(_WIN32)
// Try a whole range of possible bases. Return once we got a valid one.
u32 max_base_addr = 0x7FFF0000 - 0x10000000;
u8 *base = nullptr;
for (u32 base_addr = 0x01000000; base_addr < max_base_addr; base_addr += 0x400000)
{
base_attempts++;
base = (u8 *)base_addr;
if (Memory_TryBase(base, views, num_views, flags, arena))
{
LOG_DEBUG(Common_Memory, "Found valid memory base at %p after %i tries.", base, base_attempts);
base_attempts = 0;
break;
}
}
#else
// Linux32 is fine with the x64 method, although limited to 32-bit with no automirrors.
u8 *base = MemArena::Find4GBBase();
if (!Memory_TryBase(base, views, num_views, flags, arena))
{
LOG_ERROR(Common_Memory, "MemoryMap_Setup: Failed finding a memory base.");
return 0;
}
#endif
if (base_attempts)
LOG_ERROR(Common_Memory, "No possible memory base pointer found!");
return base;
}
void MemoryMap_Shutdown(const MemoryView *views, int num_views, u32 flags, MemArena *arena)
{
for (int i = 0; i < num_views; i++)
{
if (views[i].size == 0)
continue;
SKIP(flags, views[i].flags);
if (views[i].out_ptr_low && *views[i].out_ptr_low)
arena->ReleaseView(*views[i].out_ptr_low, views[i].size);
if (*views[i].out_ptr && (views[i].out_ptr_low && *views[i].out_ptr != *views[i].out_ptr_low))
arena->ReleaseView(*views[i].out_ptr, views[i].size);
*views[i].out_ptr = nullptr;
if (views[i].out_ptr_low)
*views[i].out_ptr_low = nullptr;
}
}

70
src/common/mem_arena.h
View File

@ -1,70 +0,0 @@
// Copyright (C) 2003 Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0 or later versions.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#pragma once
#ifdef _WIN32
#include <windows.h>
#endif
#include "common/common_types.h"
// This class lets you create a block of anonymous RAM, and then arbitrarily map views into it.
// Multiple views can mirror the same section of the block, which makes it very convient for emulating
// memory mirrors.
class MemArena
{
public:
void GrabLowMemSpace(size_t size);
void ReleaseSpace();
void *CreateView(s64 offset, size_t size, void *base = 0);
void ReleaseView(void *view, size_t size);
// This only finds 1 GB in 32-bit
static u8 *Find4GBBase();
private:
#ifdef _WIN32
HANDLE hMemoryMapping;
#else
int fd;
#endif
};
enum {
MV_MIRROR_PREVIOUS = 1,
// MV_FAKE_VMEM = 2,
// MV_WII_ONLY = 4,
MV_IS_PRIMARY_RAM = 0x100,
MV_IS_EXTRA1_RAM = 0x200,
MV_IS_EXTRA2_RAM = 0x400,
};
struct MemoryView
{
u8 **out_ptr_low;
u8 **out_ptr;
u32 virtual_address;
u32 size;
u32 flags;
};
// Uses a memory arena to set up an emulator-friendly memory map according to
// a passed-in list of MemoryView structures.
u8 *MemoryMap_Setup(const MemoryView *views, int num_views, u32 flags, MemArena *arena);
void MemoryMap_Shutdown(const MemoryView *views, int num_views, u32 flags, MemArena *arena);

113
src/core/mem_map.cpp
View File

@ -2,10 +2,8 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/common_funcs.h"
#include "common/common_types.h"
#include "common/logging/log.h"
#include "common/mem_arena.h"
#include "core/mem_map.h"
@ -13,100 +11,51 @@
namespace Memory {
u8* g_base; ///< The base pointer to the auto-mirrored arena.
u8* g_exefs_code; ///< ExeFS:/.code is loaded here
u8* g_system_mem; ///< System memory
u8* g_heap; ///< Application heap (main memory)
u8* g_heap_linear; ///< Linear heap
u8* g_vram; ///< Video memory (VRAM) pointer
u8* g_shared_mem; ///< Shared memory
u8* g_dsp_mem; ///< DSP memory
u8* g_kernel_mem; ///< Kernel memory
static MemArena arena; ///< The MemArena class
namespace {
u8* g_exefs_code; ///< ExeFS:/.code is loaded here
u8* g_system_mem; ///< System memory
u8* g_heap; ///< Application heap (main memory)
u8* g_heap_linear; ///< Linear heap
u8* g_vram; ///< Video memory (VRAM) pointer
u8* g_shared_mem; ///< Shared memory
u8* g_dsp_mem; ///< DSP memory
u8* g_kernel_mem; ///< Kernel memory
static u8* physical_bootrom; ///< Bootrom physical memory
static u8* uncached_bootrom;
static u8* physical_exefs_code; ///< Phsical ExeFS:/.code is loaded here
static u8* physical_system_mem; ///< System physical memory
static u8* physical_fcram; ///< Main physical memory (FCRAM)
static u8* physical_heap_gsp; ///< GSP heap physical memory
static u8* physical_vram; ///< Video physical memory (VRAM)
static u8* physical_shared_mem; ///< Physical shared memory
static u8* physical_dsp_mem; ///< Physical DSP memory
static u8* physical_kernel_mem; ///< Kernel memory
// We don't declare the IO region in here since its handled by other means.
static MemoryView g_views[] = {
{&g_exefs_code, &physical_exefs_code, EXEFS_CODE_VADDR, EXEFS_CODE_SIZE, 0},
{&g_vram, &physical_vram, VRAM_VADDR, VRAM_SIZE, 0},
{&g_heap, &physical_fcram, HEAP_VADDR, HEAP_SIZE, MV_IS_PRIMARY_RAM},
{&g_shared_mem, &physical_shared_mem, SHARED_MEMORY_VADDR, SHARED_MEMORY_SIZE, 0},
{&g_system_mem, &physical_system_mem, SYSTEM_MEMORY_VADDR, SYSTEM_MEMORY_SIZE, 0},
{&g_dsp_mem, &physical_dsp_mem, DSP_MEMORY_VADDR, DSP_MEMORY_SIZE, 0},
{&g_kernel_mem, &physical_kernel_mem, KERNEL_MEMORY_VADDR, KERNEL_MEMORY_SIZE, 0},
{&g_heap_linear, &physical_heap_gsp, HEAP_LINEAR_VADDR, HEAP_LINEAR_SIZE, 0},
struct MemoryArea {
u8** ptr;
size_t size;
};
/*static MemoryView views[] =
{
{&m_pScratchPad, &m_pPhysicalScratchPad, 0x00010000, SCRATCHPAD_SIZE, 0},
{NULL, &m_pUncachedScratchPad, 0x40010000, SCRATCHPAD_SIZE, MV_MIRROR_PREVIOUS},
{&m_pVRAM, &m_pPhysicalVRAM, 0x04000000, 0x00800000, 0},
{NULL, &m_pUncachedVRAM, 0x44000000, 0x00800000, MV_MIRROR_PREVIOUS},
{&m_pRAM, &m_pPhysicalRAM, 0x08000000, g_MemorySize, MV_IS_PRIMARY_RAM}, // only from 0x08800000 is it usable (last 24 megs)
{NULL, &m_pUncachedRAM, 0x48000000, g_MemorySize, MV_MIRROR_PREVIOUS | MV_IS_PRIMARY_RAM},
{NULL, &m_pKernelRAM, 0x88000000, g_MemorySize, MV_MIRROR_PREVIOUS | MV_IS_PRIMARY_RAM},
// We don't declare the IO regions in here since its handled by other means.
static MemoryArea memory_areas[] = {
{&g_exefs_code, EXEFS_CODE_SIZE },
{&g_vram, VRAM_SIZE },
{&g_heap, HEAP_SIZE },
{&g_shared_mem, SHARED_MEMORY_SIZE},
{&g_system_mem, SYSTEM_MEMORY_SIZE},
{&g_dsp_mem, DSP_MEMORY_SIZE },
{&g_kernel_mem, KERNEL_MEMORY_SIZE},
{&g_heap_linear, HEAP_LINEAR_SIZE },
};
// TODO: There are a few swizzled mirrors of VRAM, not sure about the best way to
// implement those.
};*/
static const int kNumMemViews = sizeof(g_views) / sizeof(MemoryView); ///< Number of mem views
}
void Init() {
int flags = 0;
for (size_t i = 0; i < ARRAY_SIZE(g_views); i++) {
if (g_views[i].flags & MV_IS_PRIMARY_RAM)
g_views[i].size = FCRAM_SIZE;
for (MemoryArea& area : memory_areas) {
*area.ptr = new u8[area.size];
}
g_base = MemoryMap_Setup(g_views, kNumMemViews, flags, &arena);
MemBlock_Init();
LOG_DEBUG(HW_Memory, "initialized OK, RAM at %p (mirror at 0 @ %p)", g_heap,
physical_fcram);
LOG_DEBUG(HW_Memory, "initialized OK, RAM at %p", g_heap);
}
void Shutdown() {
u32 flags = 0;
MemoryMap_Shutdown(g_views, kNumMemViews, flags, &arena);
arena.ReleaseSpace();
MemBlock_Shutdown();
g_base = nullptr;
g_exefs_code = nullptr;
g_system_mem = nullptr;
g_heap = nullptr;
g_heap_linear = nullptr;
g_vram = nullptr;
g_shared_mem = nullptr;
g_dsp_mem = nullptr;
g_kernel_mem = nullptr;
physical_bootrom = nullptr;
uncached_bootrom = nullptr;
physical_exefs_code = nullptr;
physical_system_mem = nullptr;
physical_fcram = nullptr;
physical_heap_gsp = nullptr;
physical_vram = nullptr;
physical_shared_mem = nullptr;
physical_dsp_mem = nullptr;
physical_kernel_mem = nullptr;
for (MemoryArea& area : memory_areas) {
delete[] *area.ptr;
*area.ptr = nullptr;
}
LOG_DEBUG(HW_Memory, "shutdown OK");
}

12
src/core/mem_map.h
View File

@ -105,18 +105,6 @@ struct MemoryBlock {
////////////////////////////////////////////////////////////////////////////////////////////////////
// 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_heap_linear; ///< Linear heap (main memory)
extern u8* g_heap; ///< Application heap (main memory)
extern u8* g_vram; ///< Video memory (VRAM)