yuzu/src/core/hle/kernel/vm_manager.cpp
Lioncash 7c9644646f
general: Make formatting of logged hex values more straightforward
This makes the formatting expectations more obvious (e.g. any zero padding specified
is padding that's entirely dedicated to the value being printed, not any pretty-printing
that also gets tacked on).
2018-05-02 09:49:36 -04:00

400 lines
13 KiB
C++

// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <iterator>
#include "common/assert.h"
#include "common/logging/log.h"
#include "core/arm/arm_interface.h"
#include "core/core.h"
#include "core/hle/kernel/errors.h"
#include "core/hle/kernel/vm_manager.h"
#include "core/memory.h"
#include "core/memory_hook.h"
#include "core/memory_setup.h"
namespace Kernel {
static const char* GetMemoryStateName(MemoryState state) {
static const char* names[] = {
"Unmapped",
"Io",
"Normal",
"CodeStatic",
"CodeMutable",
"Heap",
"Shared",
"Unknown1"
"ModuleCodeStatic",
"ModuleCodeMutable",
"IpcBuffer0",
"Mapped",
"ThreadLocal",
"TransferMemoryIsolated",
"TransferMemory",
"ProcessMemory",
"Unknown2"
"IpcBuffer1",
"IpcBuffer3",
"KernelStack",
};
return names[(int)state];
}
bool VirtualMemoryArea::CanBeMergedWith(const VirtualMemoryArea& next) const {
ASSERT(base + size == next.base);
if (permissions != next.permissions || meminfo_state != next.meminfo_state ||
type != next.type) {
return false;
}
if (type == VMAType::AllocatedMemoryBlock &&
(backing_block != next.backing_block || offset + size != next.offset)) {
return false;
}
if (type == VMAType::BackingMemory && backing_memory + size != next.backing_memory) {
return false;
}
if (type == VMAType::MMIO && paddr + size != next.paddr) {
return false;
}
return true;
}
VMManager::VMManager() {
Reset();
}
VMManager::~VMManager() {
Reset();
}
void VMManager::Reset() {
vma_map.clear();
// Initialize the map with a single free region covering the entire managed space.
VirtualMemoryArea initial_vma;
initial_vma.size = MAX_ADDRESS;
vma_map.emplace(initial_vma.base, initial_vma);
page_table.pointers.fill(nullptr);
page_table.special_regions.clear();
page_table.attributes.fill(Memory::PageType::Unmapped);
UpdatePageTableForVMA(initial_vma);
}
VMManager::VMAHandle VMManager::FindVMA(VAddr target) const {
if (target >= MAX_ADDRESS) {
return vma_map.end();
} else {
return std::prev(vma_map.upper_bound(target));
}
}
ResultVal<VMManager::VMAHandle> VMManager::MapMemoryBlock(VAddr target,
std::shared_ptr<std::vector<u8>> block,
size_t offset, u64 size,
MemoryState state) {
ASSERT(block != nullptr);
ASSERT(offset + size <= block->size());
// This is the appropriately sized VMA that will turn into our allocation.
CASCADE_RESULT(VMAIter vma_handle, CarveVMA(target, size));
VirtualMemoryArea& final_vma = vma_handle->second;
ASSERT(final_vma.size == size);
Core::CPU().MapBackingMemory(target, size, block->data() + offset,
VMAPermission::ReadWriteExecute);
final_vma.type = VMAType::AllocatedMemoryBlock;
final_vma.permissions = VMAPermission::ReadWrite;
final_vma.meminfo_state = state;
final_vma.backing_block = block;
final_vma.offset = offset;
UpdatePageTableForVMA(final_vma);
return MakeResult<VMAHandle>(MergeAdjacent(vma_handle));
}
ResultVal<VMManager::VMAHandle> VMManager::MapBackingMemory(VAddr target, u8* memory, u64 size,
MemoryState state) {
ASSERT(memory != nullptr);
// This is the appropriately sized VMA that will turn into our allocation.
CASCADE_RESULT(VMAIter vma_handle, CarveVMA(target, size));
VirtualMemoryArea& final_vma = vma_handle->second;
ASSERT(final_vma.size == size);
Core::CPU().MapBackingMemory(target, size, memory, VMAPermission::ReadWriteExecute);
final_vma.type = VMAType::BackingMemory;
final_vma.permissions = VMAPermission::ReadWrite;
final_vma.meminfo_state = state;
final_vma.backing_memory = memory;
UpdatePageTableForVMA(final_vma);
return MakeResult<VMAHandle>(MergeAdjacent(vma_handle));
}
ResultVal<VMManager::VMAHandle> VMManager::MapMMIO(VAddr target, PAddr paddr, u64 size,
MemoryState state,
Memory::MemoryHookPointer mmio_handler) {
// This is the appropriately sized VMA that will turn into our allocation.
CASCADE_RESULT(VMAIter vma_handle, CarveVMA(target, size));
VirtualMemoryArea& final_vma = vma_handle->second;
ASSERT(final_vma.size == size);
final_vma.type = VMAType::MMIO;
final_vma.permissions = VMAPermission::ReadWrite;
final_vma.meminfo_state = state;
final_vma.paddr = paddr;
final_vma.mmio_handler = mmio_handler;
UpdatePageTableForVMA(final_vma);
return MakeResult<VMAHandle>(MergeAdjacent(vma_handle));
}
VMManager::VMAIter VMManager::Unmap(VMAIter vma_handle) {
VirtualMemoryArea& vma = vma_handle->second;
vma.type = VMAType::Free;
vma.permissions = VMAPermission::None;
vma.meminfo_state = MemoryState::Unmapped;
vma.backing_block = nullptr;
vma.offset = 0;
vma.backing_memory = nullptr;
vma.paddr = 0;
UpdatePageTableForVMA(vma);
return MergeAdjacent(vma_handle);
}
ResultCode VMManager::UnmapRange(VAddr target, u64 size) {
CASCADE_RESULT(VMAIter vma, CarveVMARange(target, size));
VAddr target_end = target + size;
VMAIter end = vma_map.end();
// The comparison against the end of the range must be done using addresses since VMAs can be
// merged during this process, causing invalidation of the iterators.
while (vma != end && vma->second.base < target_end) {
vma = std::next(Unmap(vma));
}
ASSERT(FindVMA(target)->second.size >= size);
Core::CPU().UnmapMemory(target, size);
return RESULT_SUCCESS;
}
VMManager::VMAHandle VMManager::Reprotect(VMAHandle vma_handle, VMAPermission new_perms) {
VMAIter iter = StripIterConstness(vma_handle);
VirtualMemoryArea& vma = iter->second;
vma.permissions = new_perms;
UpdatePageTableForVMA(vma);
return MergeAdjacent(iter);
}
ResultCode VMManager::ReprotectRange(VAddr target, u64 size, VMAPermission new_perms) {
CASCADE_RESULT(VMAIter vma, CarveVMARange(target, size));
VAddr target_end = target + size;
VMAIter end = vma_map.end();
// The comparison against the end of the range must be done using addresses since VMAs can be
// merged during this process, causing invalidation of the iterators.
while (vma != end && vma->second.base < target_end) {
vma = std::next(StripIterConstness(Reprotect(vma, new_perms)));
}
return RESULT_SUCCESS;
}
void VMManager::RefreshMemoryBlockMappings(const std::vector<u8>* block) {
// If this ever proves to have a noticeable performance impact, allow users of the function to
// specify a specific range of addresses to limit the scan to.
for (const auto& p : vma_map) {
const VirtualMemoryArea& vma = p.second;
if (block == vma.backing_block.get()) {
UpdatePageTableForVMA(vma);
}
}
}
void VMManager::LogLayout() const {
for (const auto& p : vma_map) {
const VirtualMemoryArea& vma = p.second;
NGLOG_DEBUG(Kernel, "{:016X} - {:016X} size: {:016X} {}{}{} {}", vma.base,
vma.base + vma.size, vma.size,
(u8)vma.permissions & (u8)VMAPermission::Read ? 'R' : '-',
(u8)vma.permissions & (u8)VMAPermission::Write ? 'W' : '-',
(u8)vma.permissions & (u8)VMAPermission::Execute ? 'X' : '-',
GetMemoryStateName(vma.meminfo_state));
}
}
VMManager::VMAIter VMManager::StripIterConstness(const VMAHandle& iter) {
// This uses a neat C++ trick to convert a const_iterator to a regular iterator, given
// non-const access to its container.
return vma_map.erase(iter, iter); // Erases an empty range of elements
}
ResultVal<VMManager::VMAIter> VMManager::CarveVMA(VAddr base, u64 size) {
ASSERT_MSG((size & Memory::PAGE_MASK) == 0, "non-page aligned size: 0x{:016X}", size);
ASSERT_MSG((base & Memory::PAGE_MASK) == 0, "non-page aligned base: 0x{:016X}", base);
VMAIter vma_handle = StripIterConstness(FindVMA(base));
if (vma_handle == vma_map.end()) {
// Target address is outside the range managed by the kernel
return ERR_INVALID_ADDRESS;
}
VirtualMemoryArea& vma = vma_handle->second;
if (vma.type != VMAType::Free) {
// Region is already allocated
return ERR_INVALID_ADDRESS_STATE;
}
u64 start_in_vma = base - vma.base;
u64 end_in_vma = start_in_vma + size;
if (end_in_vma > vma.size) {
// Requested allocation doesn't fit inside VMA
return ERR_INVALID_ADDRESS_STATE;
}
if (end_in_vma != vma.size) {
// Split VMA at the end of the allocated region
SplitVMA(vma_handle, end_in_vma);
}
if (start_in_vma != 0) {
// Split VMA at the start of the allocated region
vma_handle = SplitVMA(vma_handle, start_in_vma);
}
return MakeResult<VMAIter>(vma_handle);
}
ResultVal<VMManager::VMAIter> VMManager::CarveVMARange(VAddr target, u64 size) {
ASSERT_MSG((size & Memory::PAGE_MASK) == 0, "non-page aligned size: 0x{:016X}", size);
ASSERT_MSG((target & Memory::PAGE_MASK) == 0, "non-page aligned base: 0x{:016X}", target);
VAddr target_end = target + size;
ASSERT(target_end >= target);
ASSERT(target_end <= MAX_ADDRESS);
ASSERT(size > 0);
VMAIter begin_vma = StripIterConstness(FindVMA(target));
VMAIter i_end = vma_map.lower_bound(target_end);
for (auto i = begin_vma; i != i_end; ++i) {
if (i->second.type == VMAType::Free) {
return ERR_INVALID_ADDRESS_STATE;
}
}
if (target != begin_vma->second.base) {
begin_vma = SplitVMA(begin_vma, target - begin_vma->second.base);
}
VMAIter end_vma = StripIterConstness(FindVMA(target_end));
if (end_vma != vma_map.end() && target_end != end_vma->second.base) {
end_vma = SplitVMA(end_vma, target_end - end_vma->second.base);
}
return MakeResult<VMAIter>(begin_vma);
}
VMManager::VMAIter VMManager::SplitVMA(VMAIter vma_handle, u64 offset_in_vma) {
VirtualMemoryArea& old_vma = vma_handle->second;
VirtualMemoryArea new_vma = old_vma; // Make a copy of the VMA
// For now, don't allow no-op VMA splits (trying to split at a boundary) because it's probably
// a bug. This restriction might be removed later.
ASSERT(offset_in_vma < old_vma.size);
ASSERT(offset_in_vma > 0);
old_vma.size = offset_in_vma;
new_vma.base += offset_in_vma;
new_vma.size -= offset_in_vma;
switch (new_vma.type) {
case VMAType::Free:
break;
case VMAType::AllocatedMemoryBlock:
new_vma.offset += offset_in_vma;
break;
case VMAType::BackingMemory:
new_vma.backing_memory += offset_in_vma;
break;
case VMAType::MMIO:
new_vma.paddr += offset_in_vma;
break;
}
ASSERT(old_vma.CanBeMergedWith(new_vma));
return vma_map.emplace_hint(std::next(vma_handle), new_vma.base, new_vma);
}
VMManager::VMAIter VMManager::MergeAdjacent(VMAIter iter) {
VMAIter next_vma = std::next(iter);
if (next_vma != vma_map.end() && iter->second.CanBeMergedWith(next_vma->second)) {
iter->second.size += next_vma->second.size;
vma_map.erase(next_vma);
}
if (iter != vma_map.begin()) {
VMAIter prev_vma = std::prev(iter);
if (prev_vma->second.CanBeMergedWith(iter->second)) {
prev_vma->second.size += iter->second.size;
vma_map.erase(iter);
iter = prev_vma;
}
}
return iter;
}
void VMManager::UpdatePageTableForVMA(const VirtualMemoryArea& vma) {
switch (vma.type) {
case VMAType::Free:
Memory::UnmapRegion(page_table, vma.base, vma.size);
break;
case VMAType::AllocatedMemoryBlock:
Memory::MapMemoryRegion(page_table, vma.base, vma.size,
vma.backing_block->data() + vma.offset);
break;
case VMAType::BackingMemory:
Memory::MapMemoryRegion(page_table, vma.base, vma.size, vma.backing_memory);
break;
case VMAType::MMIO:
Memory::MapIoRegion(page_table, vma.base, vma.size, vma.mmio_handler);
break;
}
}
u64 VMManager::GetTotalMemoryUsage() {
NGLOG_WARNING(Kernel, "(STUBBED) called");
return 0xF8000000;
}
u64 VMManager::GetTotalHeapUsage() {
NGLOG_WARNING(Kernel, "(STUBBED) called");
return 0x0;
}
VAddr VMManager::GetAddressSpaceBaseAddr() {
NGLOG_WARNING(Kernel, "(STUBBED) called");
return 0x8000000;
}
u64 VMManager::GetAddressSpaceSize() {
NGLOG_WARNING(Kernel, "(STUBBED) called");
return MAX_ADDRESS;
}
} // namespace Kernel