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citra/src/core/memory.cpp
Yuri Kunde Schlesner f2a5a77e27 Memory: Fix crash when unmapping a VMA covering cached surfaces 
Unmapping pages tries to flush any cached GPU surfaces touching that
region. When a cached page is invalidated, GetPointerFromVMA() is used
to restore the original pagetable pointer. However, since that VMA has
already been deleted, this hits an UNREACHABLE case in that function.

Now when this happens, just set the page type to Unmapped and continue,
which arrives at the correct end result.
2017-06-21 22:56:31 -07:00

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// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <array>
#include <cstring>
#include "common/assert.h"
#include "common/common_types.h"
#include "common/logging/log.h"
#include "common/swap.h"
#include "core/hle/kernel/process.h"
#include "core/memory.h"
#include "core/memory_setup.h"
#include "core/mmio.h"
#include "video_core/renderer_base.h"
#include "video_core/video_core.h"
namespace Memory {
enum class PageType {
/// Page is unmapped and should cause an access error.
Unmapped,
/// Page is mapped to regular memory. This is the only type you can get pointers to.
Memory,
/// Page is mapped to regular memory, but also needs to check for rasterizer cache flushing and
/// invalidation
RasterizerCachedMemory,
/// Page is mapped to a I/O region. Writing and reading to this page is handled by functions.
Special,
/// Page is mapped to a I/O region, but also needs to check for rasterizer cache flushing and
/// invalidation
RasterizerCachedSpecial,
};
struct SpecialRegion {
VAddr base;
u32 size;
MMIORegionPointer handler;
};
/**
* A (reasonably) fast way of allowing switchable and remappable process address spaces. It loosely
* mimics the way a real CPU page table works, but instead is optimized for minimal decoding and
* fetching requirements when accessing. In the usual case of an access to regular memory, it only
* requires an indexed fetch and a check for NULL.
*/
struct PageTable {
/**
* Array of memory pointers backing each page. An entry can only be non-null if the
* corresponding entry in the `attributes` array is of type `Memory`.
*/
std::array<u8*, PAGE_TABLE_NUM_ENTRIES> pointers;
/**
* Contains MMIO handlers that back memory regions whose entries in the `attribute` array is of
* type `Special`.
*/
std::vector<SpecialRegion> special_regions;
/**
* Array of fine grained page attributes. If it is set to any value other than `Memory`, then
* the corresponding entry in `pointers` MUST be set to null.
*/
std::array<PageType, PAGE_TABLE_NUM_ENTRIES> attributes;
/**
* Indicates the number of externally cached resources touching a page that should be
* flushed before the memory is accessed
*/
std::array<u8, PAGE_TABLE_NUM_ENTRIES> cached_res_count;
};
/// Singular page table used for the singleton process
static PageTable main_page_table;
/// Currently active page table
static PageTable* current_page_table = &main_page_table;
std::array<u8*, PAGE_TABLE_NUM_ENTRIES>* GetCurrentPageTablePointers() {
return &current_page_table->pointers;
}
static void MapPages(u32 base, u32 size, u8* memory, PageType type) {
LOG_DEBUG(HW_Memory, "Mapping %p onto %08X-%08X", memory, base * PAGE_SIZE,
(base + size) * PAGE_SIZE);
u32 end = base + size;
while (base != end) {
ASSERT_MSG(base < PAGE_TABLE_NUM_ENTRIES, "out of range mapping at %08X", base);
// Since pages are unmapped on shutdown after video core is shutdown, the renderer may be
// null here
if (current_page_table->attributes[base] == PageType::RasterizerCachedMemory ||
current_page_table->attributes[base] == PageType::RasterizerCachedSpecial) {
RasterizerFlushAndInvalidateRegion(VirtualToPhysicalAddress(base << PAGE_BITS),
PAGE_SIZE);
}
current_page_table->attributes[base] = type;
current_page_table->pointers[base] = memory;
current_page_table->cached_res_count[base] = 0;
base += 1;
if (memory != nullptr)
memory += PAGE_SIZE;
}
}
void InitMemoryMap() {
main_page_table.pointers.fill(nullptr);
main_page_table.attributes.fill(PageType::Unmapped);
main_page_table.cached_res_count.fill(0);
}
void MapMemoryRegion(VAddr base, u32 size, u8* target) {
ASSERT_MSG((size & PAGE_MASK) == 0, "non-page aligned size: %08X", size);
ASSERT_MSG((base & PAGE_MASK) == 0, "non-page aligned base: %08X", base);
MapPages(base / PAGE_SIZE, size / PAGE_SIZE, target, PageType::Memory);
}
void MapIoRegion(VAddr base, u32 size, MMIORegionPointer mmio_handler) {
ASSERT_MSG((size & PAGE_MASK) == 0, "non-page aligned size: %08X", size);
ASSERT_MSG((base & PAGE_MASK) == 0, "non-page aligned base: %08X", base);
MapPages(base / PAGE_SIZE, size / PAGE_SIZE, nullptr, PageType::Special);
current_page_table->special_regions.emplace_back(SpecialRegion{base, size, mmio_handler});
}
void UnmapRegion(VAddr base, u32 size) {
ASSERT_MSG((size & PAGE_MASK) == 0, "non-page aligned size: %08X", size);
ASSERT_MSG((base & PAGE_MASK) == 0, "non-page aligned base: %08X", base);
MapPages(base / PAGE_SIZE, size / PAGE_SIZE, nullptr, PageType::Unmapped);
}
/**
* Gets a pointer to the exact memory at the virtual address (i.e. not page aligned)
* using a VMA from the current process
*/
static u8* GetPointerFromVMA(VAddr vaddr) {
u8* direct_pointer = nullptr;
auto& vm_manager = Kernel::g_current_process->vm_manager;
auto it = vm_manager.FindVMA(vaddr);
ASSERT(it != vm_manager.vma_map.end());
auto& vma = it->second;
switch (vma.type) {
case Kernel::VMAType::AllocatedMemoryBlock:
direct_pointer = vma.backing_block->data() + vma.offset;
break;
case Kernel::VMAType::BackingMemory:
direct_pointer = vma.backing_memory;
break;
case Kernel::VMAType::Free:
return nullptr;
default:
UNREACHABLE();
}
return direct_pointer + (vaddr - vma.base);
}
/**
* This function should only be called for virtual addreses with attribute `PageType::Special`.
*/
static MMIORegionPointer GetMMIOHandler(VAddr vaddr) {
for (const auto& region : current_page_table->special_regions) {
if (vaddr >= region.base && vaddr < (region.base + region.size)) {
return region.handler;
}
}
ASSERT_MSG(false, "Mapped IO page without a handler @ %08X", vaddr);
return nullptr; // Should never happen
}
template <typename T>
T ReadMMIO(MMIORegionPointer mmio_handler, VAddr addr);
template <typename T>
T Read(const VAddr vaddr) {
const u8* page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS];
if (page_pointer) {
// NOTE: Avoid adding any extra logic to this fast-path block
T value;
std::memcpy(&value, &page_pointer[vaddr & PAGE_MASK], sizeof(T));
return value;
}
PageType type = current_page_table->attributes[vaddr >> PAGE_BITS];
switch (type) {
case PageType::Unmapped:
LOG_ERROR(HW_Memory, "unmapped Read%lu @ 0x%08X", sizeof(T) * 8, vaddr);
return 0;
case PageType::Memory:
ASSERT_MSG(false, "Mapped memory page without a pointer @ %08X", vaddr);
break;
case PageType::RasterizerCachedMemory: {
RasterizerFlushRegion(VirtualToPhysicalAddress(vaddr), sizeof(T));
T value;
std::memcpy(&value, GetPointerFromVMA(vaddr), sizeof(T));
return value;
}
case PageType::Special:
return ReadMMIO<T>(GetMMIOHandler(vaddr), vaddr);
case PageType::RasterizerCachedSpecial: {
RasterizerFlushRegion(VirtualToPhysicalAddress(vaddr), sizeof(T));
return ReadMMIO<T>(GetMMIOHandler(vaddr), vaddr);
}
default:
UNREACHABLE();
}
}
template <typename T>
void WriteMMIO(MMIORegionPointer mmio_handler, VAddr addr, const T data);
template <typename T>
void Write(const VAddr vaddr, const T data) {
u8* page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS];
if (page_pointer) {
// NOTE: Avoid adding any extra logic to this fast-path block
std::memcpy(&page_pointer[vaddr & PAGE_MASK], &data, sizeof(T));
return;
}
PageType type = current_page_table->attributes[vaddr >> PAGE_BITS];
switch (type) {
case PageType::Unmapped:
LOG_ERROR(HW_Memory, "unmapped Write%lu 0x%08X @ 0x%08X", sizeof(data) * 8, (u32)data,
vaddr);
return;
case PageType::Memory:
ASSERT_MSG(false, "Mapped memory page without a pointer @ %08X", vaddr);
break;
case PageType::RasterizerCachedMemory: {
RasterizerFlushAndInvalidateRegion(VirtualToPhysicalAddress(vaddr), sizeof(T));
std::memcpy(GetPointerFromVMA(vaddr), &data, sizeof(T));
break;
}
case PageType::Special:
WriteMMIO<T>(GetMMIOHandler(vaddr), vaddr, data);
break;
case PageType::RasterizerCachedSpecial: {
RasterizerFlushAndInvalidateRegion(VirtualToPhysicalAddress(vaddr), sizeof(T));
WriteMMIO<T>(GetMMIOHandler(vaddr), vaddr, data);
break;
}
default:
UNREACHABLE();
}
}
bool IsValidVirtualAddress(const VAddr vaddr) {
const u8* page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS];
if (page_pointer)
return true;
if (current_page_table->attributes[vaddr >> PAGE_BITS] == PageType::RasterizerCachedMemory)
return true;
if (current_page_table->attributes[vaddr >> PAGE_BITS] != PageType::Special)
return false;
MMIORegionPointer mmio_region = GetMMIOHandler(vaddr);
if (mmio_region) {
return mmio_region->IsValidAddress(vaddr);
}
return false;
}
bool IsValidPhysicalAddress(const PAddr paddr) {
return IsValidVirtualAddress(PhysicalToVirtualAddress(paddr));
}
u8* GetPointer(const VAddr vaddr) {
u8* page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS];
if (page_pointer) {
return page_pointer + (vaddr & PAGE_MASK);
}
if (current_page_table->attributes[vaddr >> PAGE_BITS] == PageType::RasterizerCachedMemory) {
return GetPointerFromVMA(vaddr);
}
LOG_ERROR(HW_Memory, "unknown GetPointer @ 0x%08x", vaddr);
return nullptr;
}
std::string ReadCString(VAddr vaddr, std::size_t max_length) {
std::string string;
string.reserve(max_length);
for (std::size_t i = 0; i < max_length; ++i) {
char c = Read8(vaddr);
if (c == '\0')
break;
string.push_back(c);
++vaddr;
}
string.shrink_to_fit();
return string;
}
u8* GetPhysicalPointer(PAddr address) {
// TODO(Subv): This call should not go through the application's memory mapping.
return GetPointer(PhysicalToVirtualAddress(address));
}
void RasterizerMarkRegionCached(PAddr start, u32 size, int count_delta) {
if (start == 0) {
return;
}
u32 num_pages = ((start + size - 1) >> PAGE_BITS) - (start >> PAGE_BITS) + 1;
PAddr paddr = start;
for (unsigned i = 0; i < num_pages; ++i) {
VAddr vaddr = PhysicalToVirtualAddress(paddr);
u8& res_count = current_page_table->cached_res_count[vaddr >> PAGE_BITS];
ASSERT_MSG(count_delta <= UINT8_MAX - res_count,
"Rasterizer resource cache counter overflow!");
ASSERT_MSG(count_delta >= -res_count, "Rasterizer resource cache counter underflow!");
// Switch page type to cached if now cached
if (res_count == 0) {
PageType& page_type = current_page_table->attributes[vaddr >> PAGE_BITS];
switch (page_type) {
case PageType::Memory:
page_type = PageType::RasterizerCachedMemory;
current_page_table->pointers[vaddr >> PAGE_BITS] = nullptr;
break;
case PageType::Special:
page_type = PageType::RasterizerCachedSpecial;
break;
default:
UNREACHABLE();
}
}
res_count += count_delta;
// Switch page type to uncached if now uncached
if (res_count == 0) {
PageType& page_type = current_page_table->attributes[vaddr >> PAGE_BITS];
switch (page_type) {
case PageType::RasterizerCachedMemory: {
u8* pointer = GetPointerFromVMA(vaddr & ~PAGE_MASK);
if (pointer == nullptr) {
// It's possible that this function has called been while updating the pagetable
// after unmapping a VMA. In that case the underlying VMA will no longer exist,
// and we should just leave the pagetable entry blank.
page_type = PageType::Unmapped;
} else {
page_type = PageType::Memory;
current_page_table->pointers[vaddr >> PAGE_BITS] = pointer;
}
break;
}
case PageType::RasterizerCachedSpecial:
page_type = PageType::Special;
break;
default:
UNREACHABLE();
}
}
paddr += PAGE_SIZE;
}
}
void RasterizerFlushRegion(PAddr start, u32 size) {
if (VideoCore::g_renderer != nullptr) {
VideoCore::g_renderer->Rasterizer()->FlushRegion(start, size);
}
}
void RasterizerFlushAndInvalidateRegion(PAddr start, u32 size) {
if (VideoCore::g_renderer != nullptr) {
VideoCore::g_renderer->Rasterizer()->FlushAndInvalidateRegion(start, size);
}
}
u8 Read8(const VAddr addr) {
return Read<u8>(addr);
}
u16 Read16(const VAddr addr) {
return Read<u16_le>(addr);
}
u32 Read32(const VAddr addr) {
return Read<u32_le>(addr);
}
u64 Read64(const VAddr addr) {
return Read<u64_le>(addr);
}
void ReadBlock(const VAddr src_addr, void* dest_buffer, const size_t size) {
size_t remaining_size = size;
size_t page_index = src_addr >> PAGE_BITS;
size_t page_offset = src_addr & PAGE_MASK;
while (remaining_size > 0) {
const size_t copy_amount = std::min(PAGE_SIZE - page_offset, remaining_size);
const VAddr current_vaddr = (page_index << PAGE_BITS) + page_offset;
switch (current_page_table->attributes[page_index]) {
case PageType::Unmapped: {
LOG_ERROR(HW_Memory, "unmapped ReadBlock @ 0x%08X (start address = 0x%08X, size = %zu)",
current_vaddr, src_addr, size);
std::memset(dest_buffer, 0, copy_amount);
break;
}
case PageType::Memory: {
DEBUG_ASSERT(current_page_table->pointers[page_index]);
const u8* src_ptr = current_page_table->pointers[page_index] + page_offset;
std::memcpy(dest_buffer, src_ptr, copy_amount);
break;
}
case PageType::Special: {
DEBUG_ASSERT(GetMMIOHandler(current_vaddr));
GetMMIOHandler(current_vaddr)->ReadBlock(current_vaddr, dest_buffer, copy_amount);
break;
}
case PageType::RasterizerCachedMemory: {
RasterizerFlushRegion(VirtualToPhysicalAddress(current_vaddr), copy_amount);
std::memcpy(dest_buffer, GetPointerFromVMA(current_vaddr), copy_amount);
break;
}
case PageType::RasterizerCachedSpecial: {
DEBUG_ASSERT(GetMMIOHandler(current_vaddr));
RasterizerFlushRegion(VirtualToPhysicalAddress(current_vaddr), copy_amount);
GetMMIOHandler(current_vaddr)->ReadBlock(current_vaddr, dest_buffer, copy_amount);
break;
}
default:
UNREACHABLE();
}
page_index++;
page_offset = 0;
dest_buffer = static_cast<u8*>(dest_buffer) + copy_amount;
remaining_size -= copy_amount;
}
}
void Write8(const VAddr addr, const u8 data) {
Write<u8>(addr, data);
}
void Write16(const VAddr addr, const u16 data) {
Write<u16_le>(addr, data);
}
void Write32(const VAddr addr, const u32 data) {
Write<u32_le>(addr, data);
}
void Write64(const VAddr addr, const u64 data) {
Write<u64_le>(addr, data);
}
void WriteBlock(const VAddr dest_addr, const void* src_buffer, const size_t size) {
size_t remaining_size = size;
size_t page_index = dest_addr >> PAGE_BITS;
size_t page_offset = dest_addr & PAGE_MASK;
while (remaining_size > 0) {
const size_t copy_amount = std::min(PAGE_SIZE - page_offset, remaining_size);
const VAddr current_vaddr = (page_index << PAGE_BITS) + page_offset;
switch (current_page_table->attributes[page_index]) {
case PageType::Unmapped: {
LOG_ERROR(HW_Memory,
"unmapped WriteBlock @ 0x%08X (start address = 0x%08X, size = %zu)",
current_vaddr, dest_addr, size);
break;
}
case PageType::Memory: {
DEBUG_ASSERT(current_page_table->pointers[page_index]);
u8* dest_ptr = current_page_table->pointers[page_index] + page_offset;
std::memcpy(dest_ptr, src_buffer, copy_amount);
break;
}
case PageType::Special: {
DEBUG_ASSERT(GetMMIOHandler(current_vaddr));
GetMMIOHandler(current_vaddr)->WriteBlock(current_vaddr, src_buffer, copy_amount);
break;
}
case PageType::RasterizerCachedMemory: {
RasterizerFlushAndInvalidateRegion(VirtualToPhysicalAddress(current_vaddr),
copy_amount);
std::memcpy(GetPointerFromVMA(current_vaddr), src_buffer, copy_amount);
break;
}
case PageType::RasterizerCachedSpecial: {
DEBUG_ASSERT(GetMMIOHandler(current_vaddr));
RasterizerFlushAndInvalidateRegion(VirtualToPhysicalAddress(current_vaddr),
copy_amount);
GetMMIOHandler(current_vaddr)->WriteBlock(current_vaddr, src_buffer, copy_amount);
break;
}
default:
UNREACHABLE();
}
page_index++;
page_offset = 0;
src_buffer = static_cast<const u8*>(src_buffer) + copy_amount;
remaining_size -= copy_amount;
}
}
void ZeroBlock(const VAddr dest_addr, const size_t size) {
size_t remaining_size = size;
size_t page_index = dest_addr >> PAGE_BITS;
size_t page_offset = dest_addr & PAGE_MASK;
static const std::array<u8, PAGE_SIZE> zeros = {};
while (remaining_size > 0) {
const size_t copy_amount = std::min(PAGE_SIZE - page_offset, remaining_size);
const VAddr current_vaddr = (page_index << PAGE_BITS) + page_offset;
switch (current_page_table->attributes[page_index]) {
case PageType::Unmapped: {
LOG_ERROR(HW_Memory, "unmapped ZeroBlock @ 0x%08X (start address = 0x%08X, size = %zu)",
current_vaddr, dest_addr, size);
break;
}
case PageType::Memory: {
DEBUG_ASSERT(current_page_table->pointers[page_index]);
u8* dest_ptr = current_page_table->pointers[page_index] + page_offset;
std::memset(dest_ptr, 0, copy_amount);
break;
}
case PageType::Special: {
DEBUG_ASSERT(GetMMIOHandler(current_vaddr));
GetMMIOHandler(current_vaddr)->WriteBlock(current_vaddr, zeros.data(), copy_amount);
break;
}
case PageType::RasterizerCachedMemory: {
RasterizerFlushAndInvalidateRegion(VirtualToPhysicalAddress(current_vaddr),
copy_amount);
std::memset(GetPointerFromVMA(current_vaddr), 0, copy_amount);
break;
}
case PageType::RasterizerCachedSpecial: {
DEBUG_ASSERT(GetMMIOHandler(current_vaddr));
RasterizerFlushAndInvalidateRegion(VirtualToPhysicalAddress(current_vaddr),
copy_amount);
GetMMIOHandler(current_vaddr)->WriteBlock(current_vaddr, zeros.data(), copy_amount);
break;
}
default:
UNREACHABLE();
}
page_index++;
page_offset = 0;
remaining_size -= copy_amount;
}
}
void CopyBlock(VAddr dest_addr, VAddr src_addr, const size_t size) {
size_t remaining_size = size;
size_t page_index = src_addr >> PAGE_BITS;
size_t page_offset = src_addr & PAGE_MASK;
while (remaining_size > 0) {
const size_t copy_amount = std::min(PAGE_SIZE - page_offset, remaining_size);
const VAddr current_vaddr = (page_index << PAGE_BITS) + page_offset;
switch (current_page_table->attributes[page_index]) {
case PageType::Unmapped: {
LOG_ERROR(HW_Memory, "unmapped CopyBlock @ 0x%08X (start address = 0x%08X, size = %zu)",
current_vaddr, src_addr, size);
ZeroBlock(dest_addr, copy_amount);
break;
}
case PageType::Memory: {
DEBUG_ASSERT(current_page_table->pointers[page_index]);
const u8* src_ptr = current_page_table->pointers[page_index] + page_offset;
WriteBlock(dest_addr, src_ptr, copy_amount);
break;
}
case PageType::Special: {
DEBUG_ASSERT(GetMMIOHandler(current_vaddr));
std::vector<u8> buffer(copy_amount);
GetMMIOHandler(current_vaddr)->ReadBlock(current_vaddr, buffer.data(), buffer.size());
WriteBlock(dest_addr, buffer.data(), buffer.size());
break;
}
case PageType::RasterizerCachedMemory: {
RasterizerFlushRegion(VirtualToPhysicalAddress(current_vaddr), copy_amount);
WriteBlock(dest_addr, GetPointerFromVMA(current_vaddr), copy_amount);
break;
}
case PageType::RasterizerCachedSpecial: {
DEBUG_ASSERT(GetMMIOHandler(current_vaddr));
RasterizerFlushRegion(VirtualToPhysicalAddress(current_vaddr), copy_amount);
std::vector<u8> buffer(copy_amount);
GetMMIOHandler(current_vaddr)->ReadBlock(current_vaddr, buffer.data(), buffer.size());
WriteBlock(dest_addr, buffer.data(), buffer.size());
break;
}
default:
UNREACHABLE();
}
page_index++;
page_offset = 0;
dest_addr += copy_amount;
src_addr += copy_amount;
remaining_size -= copy_amount;
}
}
template <>
u8 ReadMMIO<u8>(MMIORegionPointer mmio_handler, VAddr addr) {
return mmio_handler->Read8(addr);
}
template <>
u16 ReadMMIO<u16>(MMIORegionPointer mmio_handler, VAddr addr) {
return mmio_handler->Read16(addr);
}
template <>
u32 ReadMMIO<u32>(MMIORegionPointer mmio_handler, VAddr addr) {
return mmio_handler->Read32(addr);
}
template <>
u64 ReadMMIO<u64>(MMIORegionPointer mmio_handler, VAddr addr) {
return mmio_handler->Read64(addr);
}
template <>
void WriteMMIO<u8>(MMIORegionPointer mmio_handler, VAddr addr, const u8 data) {
mmio_handler->Write8(addr, data);
}
template <>
void WriteMMIO<u16>(MMIORegionPointer mmio_handler, VAddr addr, const u16 data) {
mmio_handler->Write16(addr, data);
}
template <>
void WriteMMIO<u32>(MMIORegionPointer mmio_handler, VAddr addr, const u32 data) {
mmio_handler->Write32(addr, data);
}
template <>
void WriteMMIO<u64>(MMIORegionPointer mmio_handler, VAddr addr, const u64 data) {
mmio_handler->Write64(addr, data);
}
PAddr VirtualToPhysicalAddress(const VAddr addr) {
if (addr == 0) {
return 0;
} else if (addr >= VRAM_VADDR && addr < VRAM_VADDR_END) {
return addr - VRAM_VADDR + VRAM_PADDR;
} else if (addr >= LINEAR_HEAP_VADDR && addr < LINEAR_HEAP_VADDR_END) {
return addr - LINEAR_HEAP_VADDR + FCRAM_PADDR;
} else if (addr >= NEW_LINEAR_HEAP_VADDR && addr < NEW_LINEAR_HEAP_VADDR_END) {
return addr - NEW_LINEAR_HEAP_VADDR + FCRAM_PADDR;
} else if (addr >= DSP_RAM_VADDR && addr < DSP_RAM_VADDR_END) {
return addr - DSP_RAM_VADDR + DSP_RAM_PADDR;
} else if (addr >= IO_AREA_VADDR && addr < IO_AREA_VADDR_END) {
return addr - IO_AREA_VADDR + IO_AREA_PADDR;
} else if (addr >= N3DS_EXTRA_RAM_VADDR && addr < N3DS_EXTRA_RAM_VADDR_END) {
return addr - N3DS_EXTRA_RAM_VADDR + N3DS_EXTRA_RAM_PADDR;
}
LOG_ERROR(HW_Memory, "Unknown virtual address @ 0x%08X", addr);
// To help with debugging, set bit on address so that it's obviously invalid.
return addr | 0x80000000;
}
VAddr PhysicalToVirtualAddress(const PAddr addr) {
if (addr == 0) {
return 0;
} else if (addr >= VRAM_PADDR && addr < VRAM_PADDR_END) {
return addr - VRAM_PADDR + VRAM_VADDR;
} else if (addr >= FCRAM_PADDR && addr < FCRAM_PADDR_END) {
return addr - FCRAM_PADDR + Kernel::g_current_process->GetLinearHeapAreaAddress();
} else if (addr >= DSP_RAM_PADDR && addr < DSP_RAM_PADDR_END) {
return addr - DSP_RAM_PADDR + DSP_RAM_VADDR;
} else if (addr >= IO_AREA_PADDR && addr < IO_AREA_PADDR_END) {
return addr - IO_AREA_PADDR + IO_AREA_VADDR;
} else if (addr >= N3DS_EXTRA_RAM_PADDR && addr < N3DS_EXTRA_RAM_PADDR_END) {
return addr - N3DS_EXTRA_RAM_PADDR + N3DS_EXTRA_RAM_VADDR;
}
LOG_ERROR(HW_Memory, "Unknown physical address @ 0x%08X", addr);
// To help with debugging, set bit on address so that it's obviously invalid.
return addr | 0x80000000;
}
} // namespace
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