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core/memory: Move memory read/write implementation functions into an anonymous namespace 

These will eventually be migrated into the main Memory class, but for
now, we put them in an anonymous namespace, so that the other functions
that use them, can be migrated over separately.
master
Lioncash 2019-11-26 13:58:03 +07:00
parent e58748fd80
commit fc7d0a17b6
1 changed files with 98 additions and 97 deletions
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195
src/core/memory.cpp
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@ -20,8 +20,105 @@
#include "video_core/gpu.h"
namespace Memory {
namespace {
Common::PageTable* current_page_table = nullptr;
static Common::PageTable* current_page_table = nullptr;
/**
* Gets a pointer to the exact memory at the virtual address (i.e. not page aligned)
* using a VMA from the current process
*/
u8* GetPointerFromVMA(const Kernel::Process& process, VAddr vaddr) {
const auto& vm_manager = process.VMManager();
const auto it = vm_manager.FindVMA(vaddr);
DEBUG_ASSERT(vm_manager.IsValidHandle(it));
u8* direct_pointer = nullptr;
const 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);
}
/**
* Gets a pointer to the exact memory at the virtual address (i.e. not page aligned)
* using a VMA from the current process.
*/
u8* GetPointerFromVMA(VAddr vaddr) {
return ::Memory::GetPointerFromVMA(*Core::System::GetInstance().CurrentProcess(), vaddr);
}
template <typename T>
T Read(const VAddr vaddr) {
const u8* const page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS];
if (page_pointer != nullptr) {
// 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;
}
const Common::PageType type = current_page_table->attributes[vaddr >> PAGE_BITS];
switch (type) {
case Common::PageType::Unmapped:
LOG_ERROR(HW_Memory, "Unmapped Read{} @ 0x{:08X}", sizeof(T) * 8, vaddr);
return 0;
case Common::PageType::Memory:
ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", vaddr);
break;
case Common::PageType::RasterizerCachedMemory: {
const u8* const host_ptr{GetPointerFromVMA(vaddr)};
Core::System::GetInstance().GPU().FlushRegion(ToCacheAddr(host_ptr), sizeof(T));
T value;
std::memcpy(&value, host_ptr, sizeof(T));
return value;
}
default:
UNREACHABLE();
}
return {};
}
template <typename T>
void Write(const VAddr vaddr, const T data) {
u8* const page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS];
if (page_pointer != nullptr) {
// NOTE: Avoid adding any extra logic to this fast-path block
std::memcpy(&page_pointer[vaddr & PAGE_MASK], &data, sizeof(T));
return;
}
Common::PageType type = current_page_table->attributes[vaddr >> PAGE_BITS];
switch (type) {
case Common::PageType::Unmapped:
LOG_ERROR(HW_Memory, "Unmapped Write{} 0x{:08X} @ 0x{:016X}", sizeof(data) * 8,
static_cast<u32>(data), vaddr);
return;
case Common::PageType::Memory:
ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", vaddr);
break;
case Common::PageType::RasterizerCachedMemory: {
u8* const host_ptr{GetPointerFromVMA(vaddr)};
Core::System::GetInstance().GPU().InvalidateRegion(ToCacheAddr(host_ptr), sizeof(T));
std::memcpy(host_ptr, &data, sizeof(T));
break;
}
default:
UNREACHABLE();
}
}
} // Anonymous namespace
// Implementation class used to keep the specifics of the memory subsystem hidden
// from outside classes. This also allows modification to the internals of the memory
@ -191,102 +288,6 @@ void SetCurrentPageTable(Kernel::Process& process) {
system.ArmInterface(3).PageTableChanged(*current_page_table, address_space_width);
}
/**
* 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(const Kernel::Process& process, VAddr vaddr) {
const auto& vm_manager = process.VMManager();
const auto it = vm_manager.FindVMA(vaddr);
DEBUG_ASSERT(vm_manager.IsValidHandle(it));
u8* direct_pointer = nullptr;
const 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);
}
/**
* 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) {
return GetPointerFromVMA(*Core::System::GetInstance().CurrentProcess(), vaddr);
}
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;
}
Common::PageType type = current_page_table->attributes[vaddr >> PAGE_BITS];
switch (type) {
case Common::PageType::Unmapped:
LOG_ERROR(HW_Memory, "Unmapped Read{} @ 0x{:08X}", sizeof(T) * 8, vaddr);
return 0;
case Common::PageType::Memory:
ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", vaddr);
break;
case Common::PageType::RasterizerCachedMemory: {
auto host_ptr{GetPointerFromVMA(vaddr)};
Core::System::GetInstance().GPU().FlushRegion(ToCacheAddr(host_ptr), sizeof(T));
T value;
std::memcpy(&value, host_ptr, sizeof(T));
return value;
}
default:
UNREACHABLE();
}
return {};
}
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;
}
Common::PageType type = current_page_table->attributes[vaddr >> PAGE_BITS];
switch (type) {
case Common::PageType::Unmapped:
LOG_ERROR(HW_Memory, "Unmapped Write{} 0x{:08X} @ 0x{:016X}", sizeof(data) * 8,
static_cast<u32>(data), vaddr);
return;
case Common::PageType::Memory:
ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", vaddr);
break;
case Common::PageType::RasterizerCachedMemory: {
auto host_ptr{GetPointerFromVMA(vaddr)};
Core::System::GetInstance().GPU().InvalidateRegion(ToCacheAddr(host_ptr), sizeof(T));
std::memcpy(host_ptr, &data, sizeof(T));
break;
}
default:
UNREACHABLE();
}
}
bool IsKernelVirtualAddress(const VAddr vaddr) {
return KERNEL_REGION_VADDR <= vaddr && vaddr < KERNEL_REGION_END;
}