mctaylors/suyu
1
0
Fork 0
forked from suyu/suyu
Code Pull requests Activity

kernel: transfer_memory: Refactor for new VMM.

Browse source
This commit is contained in:
bunnei 2020-04-08 19:05:31 -04:00
parent c53454ff46
commit 3fcc4cab4f
2 changed files with 16 additions and 130 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

99
src/core/hle/kernel/transfer_memory.cpp
View file

@ -2,10 +2,9 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "core/hle/kernel/errors.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/memory/page_table.h"
#include "core/hle/kernel/process.h"
#include "core/hle/kernel/shared_memory.h"
#include "core/hle/kernel/transfer_memory.h"
#include "core/hle/result.h"
#include "core/memory.h"
@ -22,13 +21,13 @@ TransferMemory::~TransferMemory() {
std::shared_ptr<TransferMemory> TransferMemory::Create(KernelCore& kernel,
Core::Memory::Memory& memory,
VAddr base_address, u64 size,
MemoryPermission permissions) {
VAddr base_address, std::size_t size,
Memory::MemoryPermission permissions) {
std::shared_ptr<TransferMemory> transfer_memory{
std::make_shared<TransferMemory>(kernel, memory)};
transfer_memory->base_address = base_address;
transfer_memory->memory_size = size;
transfer_memory->size = size;
transfer_memory->owner_permissions = permissions;
transfer_memory->owner_process = kernel.CurrentProcess();
@ -39,98 +38,12 @@ const u8* TransferMemory::GetPointer() const {
return memory.GetPointer(base_address);
}
u64 TransferMemory::GetSize() const {
return memory_size;
}
ResultCode TransferMemory::MapMemory(VAddr address, u64 size, MemoryPermission permissions) {
if (memory_size != size) {
return ERR_INVALID_SIZE;
}
if (owner_permissions != permissions) {
return ERR_INVALID_STATE;
}
if (is_mapped) {
return ERR_INVALID_STATE;
}
backing_block = std::make_shared<PhysicalMemory>(size);
const auto map_state = owner_permissions == MemoryPermission::None
? MemoryState::TransferMemoryIsolated
: MemoryState::TransferMemory;
auto& vm_manager = owner_process->VMManager();
const auto map_result = vm_manager.MapMemoryBlock(address, backing_block, 0, size, map_state);
if (map_result.Failed()) {
return map_result.Code();
}
is_mapped = true;
return RESULT_SUCCESS;
}
ResultCode TransferMemory::Reserve() {
auto& vm_manager{owner_process->VMManager()};
const auto check_range_result{vm_manager.CheckRangeState(
base_address, memory_size, MemoryState::FlagTransfer | MemoryState::FlagMemoryPoolAllocated,
MemoryState::FlagTransfer | MemoryState::FlagMemoryPoolAllocated, VMAPermission::All,
VMAPermission::ReadWrite, MemoryAttribute::Mask, MemoryAttribute::None,
MemoryAttribute::IpcAndDeviceMapped)};
if (check_range_result.Failed()) {
return check_range_result.Code();
}
auto [state_, permissions_, attribute] = *check_range_result;
if (const auto result{vm_manager.ReprotectRange(
base_address, memory_size, SharedMemory::ConvertPermissions(owner_permissions))};
result.IsError()) {
return result;
}
return vm_manager.SetMemoryAttribute(base_address, memory_size, MemoryAttribute::Mask,
attribute | MemoryAttribute::Locked);
return owner_process->PageTable().ReserveTransferMemory(base_address, size, owner_permissions);
}
ResultCode TransferMemory::Reset() {
auto& vm_manager{owner_process->VMManager()};
if (const auto result{vm_manager.CheckRangeState(
base_address, memory_size,
MemoryState::FlagTransfer | MemoryState::FlagMemoryPoolAllocated,
MemoryState::FlagTransfer | MemoryState::FlagMemoryPoolAllocated, VMAPermission::None,
VMAPermission::None, MemoryAttribute::Mask, MemoryAttribute::Locked,
MemoryAttribute::IpcAndDeviceMapped)};
result.Failed()) {
return result.Code();
}
if (const auto result{
vm_manager.ReprotectRange(base_address, memory_size, VMAPermission::ReadWrite)};
result.IsError()) {
return result;
}
return vm_manager.SetMemoryAttribute(base_address, memory_size, MemoryAttribute::Mask,
MemoryAttribute::None);
}
ResultCode TransferMemory::UnmapMemory(VAddr address, u64 size) {
if (memory_size != size) {
return ERR_INVALID_SIZE;
}
auto& vm_manager = owner_process->VMManager();
const auto result = vm_manager.UnmapRange(address, size);
if (result.IsError()) {
return result;
}
is_mapped = false;
return RESULT_SUCCESS;
return owner_process->PageTable().ResetTransferMemory(base_address, size);
}
} // namespace Kernel

47
src/core/hle/kernel/transfer_memory.h
View file

@ -6,6 +6,7 @@
#include <memory>
#include "core/hle/kernel/memory/memory_block.h"
#include "core/hle/kernel/object.h"
#include "core/hle/kernel/physical_memory.h"
@ -20,8 +21,6 @@ namespace Kernel {
class KernelCore;
class Process;
enum class MemoryPermission : u32;
/// Defines the interface for transfer memory objects.
///
/// Transfer memory is typically used for the purpose of
@ -36,8 +35,8 @@ public:
static constexpr HandleType HANDLE_TYPE = HandleType::TransferMemory;
static std::shared_ptr<TransferMemory> Create(KernelCore& kernel, Core::Memory::Memory& memory,
VAddr base_address, u64 size,
MemoryPermission permissions);
VAddr base_address, std::size_t size,
Memory::MemoryPermission permissions);
TransferMemory(const TransferMemory&) = delete;
TransferMemory& operator=(const TransferMemory&) = delete;
@ -61,29 +60,9 @@ public:
const u8* GetPointer() const;
/// Gets the size of the memory backing this instance in bytes.
u64 GetSize() const;
/// Attempts to map transfer memory with the given range and memory permissions.
///
/// @param address The base address to being mapping memory at.
/// @param size The size of the memory to map, in bytes.
/// @param permissions The memory permissions to check against when mapping memory.
///
/// @pre The given address, size, and memory permissions must all match
/// the same values that were given when creating the transfer memory
/// instance.
///
ResultCode MapMemory(VAddr address, u64 size, MemoryPermission permissions);
/// Unmaps the transfer memory with the given range
///
/// @param address The base address to begin unmapping memory at.
/// @param size The size of the memory to unmap, in bytes.
///
/// @pre The given address and size must be the same as the ones used
/// to create the transfer memory instance.
///
ResultCode UnmapMemory(VAddr address, u64 size);
constexpr std::size_t GetSize() const {
return size;
}
/// Reserves the region to be used for the transfer memory, called after the transfer memory is
/// created.
@ -94,23 +73,17 @@ public:
ResultCode Reset();
private:
/// Memory block backing this instance.
std::shared_ptr<PhysicalMemory> backing_block;
/// The base address for the memory managed by this instance.
VAddr base_address = 0;
VAddr base_address{};
/// Size of the memory, in bytes, that this instance manages.
u64 memory_size = 0;
std::size_t size{};
/// The memory permissions that are applied to this instance.
MemoryPermission owner_permissions{};
Memory::MemoryPermission owner_permissions{};
/// The process that this transfer memory instance was created under.
Process* owner_process = nullptr;
/// Whether or not this transfer memory instance has mapped memory.
bool is_mapped = false;
Process* owner_process{};
Core::Memory::Memory& memory;
};