mirror of
https://gitlab.com/suyu-emu/suyu.git
synced 2024-03-15 23:15:44 +00:00
339 lines
15 KiB
C++
339 lines
15 KiB
C++
// SPDX-FileCopyrightText: 2021 Skyline Team and Contributors
|
|
// SPDX-License-Identifier: GPL-3.0-or-later
|
|
|
|
#include "common/address_space.h"
|
|
#include "common/assert.h"
|
|
|
|
#define MAP_MEMBER(returnType) \
|
|
template <typename VaType, VaType UnmappedVa, typename PaType, PaType UnmappedPa, \
|
|
bool PaContigSplit, size_t AddressSpaceBits, typename ExtraBlockInfo> \
|
|
requires AddressSpaceValid<VaType, AddressSpaceBits> returnType FlatAddressSpaceMap< \
|
|
VaType, UnmappedVa, PaType, UnmappedPa, PaContigSplit, AddressSpaceBits, ExtraBlockInfo>
|
|
#define MAP_MEMBER_CONST() \
|
|
template <typename VaType, VaType UnmappedVa, typename PaType, PaType UnmappedPa, \
|
|
bool PaContigSplit, size_t AddressSpaceBits, typename ExtraBlockInfo> \
|
|
requires AddressSpaceValid<VaType, AddressSpaceBits> FlatAddressSpaceMap< \
|
|
VaType, UnmappedVa, PaType, UnmappedPa, PaContigSplit, AddressSpaceBits, ExtraBlockInfo>
|
|
|
|
#define MM_MEMBER(returnType) \
|
|
template <typename VaType, VaType UnmappedVa, size_t AddressSpaceBits> \
|
|
requires AddressSpaceValid<VaType, AddressSpaceBits> returnType \
|
|
FlatMemoryManager<VaType, UnmappedVa, AddressSpaceBits>
|
|
|
|
#define ALLOC_MEMBER(returnType) \
|
|
template <typename VaType, VaType UnmappedVa, size_t AddressSpaceBits> \
|
|
requires AddressSpaceValid<VaType, AddressSpaceBits> returnType \
|
|
FlatAllocator<VaType, UnmappedVa, AddressSpaceBits>
|
|
#define ALLOC_MEMBER_CONST() \
|
|
template <typename VaType, VaType UnmappedVa, size_t AddressSpaceBits> \
|
|
requires AddressSpaceValid<VaType, AddressSpaceBits> \
|
|
FlatAllocator<VaType, UnmappedVa, AddressSpaceBits>
|
|
|
|
namespace Common {
|
|
MAP_MEMBER_CONST()::FlatAddressSpaceMap(VaType vaLimit_,
|
|
std::function<void(VaType, VaType)> unmapCallback_)
|
|
: unmapCallback(std::move(unmapCallback_)), vaLimit(vaLimit_) {
|
|
if (vaLimit > VaMaximum)
|
|
UNREACHABLE_MSG("Invalid VA limit!");
|
|
}
|
|
|
|
MAP_MEMBER(void)::MapLocked(VaType virt, PaType phys, VaType size, ExtraBlockInfo extraInfo) {
|
|
VaType virtEnd{virt + size};
|
|
|
|
if (virtEnd > vaLimit)
|
|
UNREACHABLE_MSG("Trying to map a block past the VA limit: virtEnd: 0x{:X}, vaLimit: 0x{:X}",
|
|
virtEnd, vaLimit);
|
|
|
|
auto blockEndSuccessor{std::lower_bound(blocks.begin(), blocks.end(), virtEnd)};
|
|
if (blockEndSuccessor == blocks.begin())
|
|
UNREACHABLE_MSG("Trying to map a block before the VA start: virtEnd: 0x{:X}", virtEnd);
|
|
|
|
auto blockEndPredecessor{std::prev(blockEndSuccessor)};
|
|
|
|
if (blockEndSuccessor != blocks.end()) {
|
|
// We have blocks in front of us, if one is directly in front then we don't have to add a
|
|
// tail
|
|
if (blockEndSuccessor->virt != virtEnd) {
|
|
PaType tailPhys{[&]() -> PaType {
|
|
if constexpr (!PaContigSplit) {
|
|
return blockEndPredecessor
|
|
->phys; // Always propagate unmapped regions rather than calculating offset
|
|
} else {
|
|
if (blockEndPredecessor->Unmapped())
|
|
return blockEndPredecessor->phys; // Always propagate unmapped regions
|
|
// rather than calculating offset
|
|
else
|
|
return blockEndPredecessor->phys + virtEnd - blockEndPredecessor->virt;
|
|
}
|
|
}()};
|
|
|
|
if (blockEndPredecessor->virt >= virt) {
|
|
// If this block's start would be overlapped by the map then reuse it as a tail
|
|
// block
|
|
blockEndPredecessor->virt = virtEnd;
|
|
blockEndPredecessor->phys = tailPhys;
|
|
blockEndPredecessor->extraInfo = blockEndPredecessor->extraInfo;
|
|
|
|
// No longer predecessor anymore
|
|
blockEndSuccessor = blockEndPredecessor--;
|
|
} else {
|
|
// Else insert a new one and we're done
|
|
blocks.insert(blockEndSuccessor,
|
|
{Block(virt, phys, extraInfo),
|
|
Block(virtEnd, tailPhys, blockEndPredecessor->extraInfo)});
|
|
if (unmapCallback)
|
|
unmapCallback(virt, size);
|
|
|
|
return;
|
|
}
|
|
}
|
|
} else {
|
|
// blockEndPredecessor will always be unmapped as blocks has to be terminated by an unmapped
|
|
// chunk
|
|
if (blockEndPredecessor != blocks.begin() && blockEndPredecessor->virt >= virt) {
|
|
// Move the unmapped block start backwards
|
|
blockEndPredecessor->virt = virtEnd;
|
|
|
|
// No longer predecessor anymore
|
|
blockEndSuccessor = blockEndPredecessor--;
|
|
} else {
|
|
// Else insert a new one and we're done
|
|
blocks.insert(blockEndSuccessor,
|
|
{Block(virt, phys, extraInfo), Block(virtEnd, UnmappedPa, {})});
|
|
if (unmapCallback)
|
|
unmapCallback(virt, size);
|
|
|
|
return;
|
|
}
|
|
}
|
|
|
|
auto blockStartSuccessor{blockEndSuccessor};
|
|
|
|
// Walk the block vector to find the start successor as this is more efficient than another
|
|
// binary search in most scenarios
|
|
while (std::prev(blockStartSuccessor)->virt >= virt)
|
|
blockStartSuccessor--;
|
|
|
|
// Check that the start successor is either the end block or something in between
|
|
if (blockStartSuccessor->virt > virtEnd) {
|
|
UNREACHABLE_MSG("Unsorted block in AS map: virt: 0x{:X}", blockStartSuccessor->virt);
|
|
} else if (blockStartSuccessor->virt == virtEnd) {
|
|
// We need to create a new block as there are none spare that we would overwrite
|
|
blocks.insert(blockStartSuccessor, Block(virt, phys, extraInfo));
|
|
} else {
|
|
// Erase overwritten blocks
|
|
if (auto eraseStart{std::next(blockStartSuccessor)}; eraseStart != blockEndSuccessor)
|
|
blocks.erase(eraseStart, blockEndSuccessor);
|
|
|
|
// Reuse a block that would otherwise be overwritten as a start block
|
|
blockStartSuccessor->virt = virt;
|
|
blockStartSuccessor->phys = phys;
|
|
blockStartSuccessor->extraInfo = extraInfo;
|
|
}
|
|
|
|
if (unmapCallback)
|
|
unmapCallback(virt, size);
|
|
}
|
|
|
|
MAP_MEMBER(void)::UnmapLocked(VaType virt, VaType size) {
|
|
VaType virtEnd{virt + size};
|
|
|
|
if (virtEnd > vaLimit)
|
|
UNREACHABLE_MSG("Trying to map a block past the VA limit: virtEnd: 0x{:X}, vaLimit: 0x{:X}",
|
|
virtEnd, vaLimit);
|
|
|
|
auto blockEndSuccessor{std::lower_bound(blocks.begin(), blocks.end(), virtEnd)};
|
|
if (blockEndSuccessor == blocks.begin())
|
|
UNREACHABLE_MSG("Trying to unmap a block before the VA start: virtEnd: 0x{:X}", virtEnd);
|
|
|
|
auto blockEndPredecessor{std::prev(blockEndSuccessor)};
|
|
|
|
auto walkBackToPredecessor{[&](auto iter) {
|
|
while (iter->virt >= virt)
|
|
iter--;
|
|
|
|
return iter;
|
|
}};
|
|
|
|
auto eraseBlocksWithEndUnmapped{[&](auto unmappedEnd) {
|
|
auto blockStartPredecessor{walkBackToPredecessor(unmappedEnd)};
|
|
auto blockStartSuccessor{std::next(blockStartPredecessor)};
|
|
|
|
auto eraseEnd{[&]() {
|
|
if (blockStartPredecessor->Unmapped()) {
|
|
// If the start predecessor is unmapped then we can erase everything in our region
|
|
// and be done
|
|
return std::next(unmappedEnd);
|
|
} else {
|
|
// Else reuse the end predecessor as the start of our unmapped region then erase all
|
|
// up to it
|
|
unmappedEnd->virt = virt;
|
|
return unmappedEnd;
|
|
}
|
|
}()};
|
|
|
|
// We can't have two unmapped regions after each other
|
|
if (eraseEnd != blocks.end() &&
|
|
(eraseEnd == blockStartSuccessor ||
|
|
(blockStartPredecessor->Unmapped() && eraseEnd->Unmapped())))
|
|
UNREACHABLE_MSG("Multiple contiguous unmapped regions are unsupported!");
|
|
|
|
blocks.erase(blockStartSuccessor, eraseEnd);
|
|
}};
|
|
|
|
// We can avoid any splitting logic if these are the case
|
|
if (blockEndPredecessor->Unmapped()) {
|
|
if (blockEndPredecessor->virt > virt)
|
|
eraseBlocksWithEndUnmapped(blockEndPredecessor);
|
|
|
|
if (unmapCallback)
|
|
unmapCallback(virt, size);
|
|
|
|
return; // The region is unmapped, bail out early
|
|
} else if (blockEndSuccessor->virt == virtEnd && blockEndSuccessor->Unmapped()) {
|
|
eraseBlocksWithEndUnmapped(blockEndSuccessor);
|
|
|
|
if (unmapCallback)
|
|
unmapCallback(virt, size);
|
|
|
|
return; // The region is unmapped here and doesn't need splitting, bail out early
|
|
} else if (blockEndSuccessor == blocks.end()) {
|
|
// This should never happen as the end should always follow an unmapped block
|
|
UNREACHABLE_MSG("Unexpected Memory Manager state!");
|
|
} else if (blockEndSuccessor->virt != virtEnd) {
|
|
// If one block is directly in front then we don't have to add a tail
|
|
|
|
// The previous block is mapped so we will need to add a tail with an offset
|
|
PaType tailPhys{[&]() {
|
|
if constexpr (PaContigSplit)
|
|
return blockEndPredecessor->phys + virtEnd - blockEndPredecessor->virt;
|
|
else
|
|
return blockEndPredecessor->phys;
|
|
}()};
|
|
|
|
if (blockEndPredecessor->virt >= virt) {
|
|
// If this block's start would be overlapped by the unmap then reuse it as a tail block
|
|
blockEndPredecessor->virt = virtEnd;
|
|
blockEndPredecessor->phys = tailPhys;
|
|
|
|
// No longer predecessor anymore
|
|
blockEndSuccessor = blockEndPredecessor--;
|
|
} else {
|
|
blocks.insert(blockEndSuccessor,
|
|
{Block(virt, UnmappedPa, {}),
|
|
Block(virtEnd, tailPhys, blockEndPredecessor->extraInfo)});
|
|
if (unmapCallback)
|
|
unmapCallback(virt, size);
|
|
|
|
return; // The previous block is mapped and ends before
|
|
}
|
|
}
|
|
|
|
// Walk the block vector to find the start predecessor as this is more efficient than another
|
|
// binary search in most scenarios
|
|
auto blockStartPredecessor{walkBackToPredecessor(blockEndSuccessor)};
|
|
auto blockStartSuccessor{std::next(blockStartPredecessor)};
|
|
|
|
if (blockStartSuccessor->virt > virtEnd) {
|
|
UNREACHABLE_MSG("Unsorted block in AS map: virt: 0x{:X}", blockStartSuccessor->virt);
|
|
} else if (blockStartSuccessor->virt == virtEnd) {
|
|
// There are no blocks between the start and the end that would let us skip inserting a new
|
|
// one for head
|
|
|
|
// The previous block is may be unmapped, if so we don't need to insert any unmaps after it
|
|
if (blockStartPredecessor->Mapped())
|
|
blocks.insert(blockStartSuccessor, Block(virt, UnmappedPa, {}));
|
|
} else if (blockStartPredecessor->Unmapped()) {
|
|
// If the previous block is unmapped
|
|
blocks.erase(blockStartSuccessor, blockEndPredecessor);
|
|
} else {
|
|
// Erase overwritten blocks, skipping the first one as we have written the unmapped start
|
|
// block there
|
|
if (auto eraseStart{std::next(blockStartSuccessor)}; eraseStart != blockEndSuccessor)
|
|
blocks.erase(eraseStart, blockEndSuccessor);
|
|
|
|
// Add in the unmapped block header
|
|
blockStartSuccessor->virt = virt;
|
|
blockStartSuccessor->phys = UnmappedPa;
|
|
}
|
|
|
|
if (unmapCallback)
|
|
unmapCallback(virt, size);
|
|
}
|
|
|
|
ALLOC_MEMBER_CONST()::FlatAllocator(VaType vaStart_, VaType vaLimit_)
|
|
: Base(vaLimit_), currentLinearAllocEnd(vaStart_), vaStart(vaStart_) {}
|
|
|
|
ALLOC_MEMBER(VaType)::Allocate(VaType size) {
|
|
std::scoped_lock lock(this->blockMutex);
|
|
|
|
VaType allocStart{UnmappedVa};
|
|
VaType allocEnd{currentLinearAllocEnd + size};
|
|
|
|
// Avoid searching backwards in the address space if possible
|
|
if (allocEnd >= currentLinearAllocEnd && allocEnd <= this->vaLimit) {
|
|
auto allocEndSuccessor{
|
|
std::lower_bound(this->blocks.begin(), this->blocks.end(), allocEnd)};
|
|
if (allocEndSuccessor == this->blocks.begin())
|
|
UNREACHABLE_MSG("First block in AS map is invalid!");
|
|
|
|
auto allocEndPredecessor{std::prev(allocEndSuccessor)};
|
|
if (allocEndPredecessor->virt <= currentLinearAllocEnd) {
|
|
allocStart = currentLinearAllocEnd;
|
|
} else {
|
|
// Skip over fixed any mappings in front of us
|
|
while (allocEndSuccessor != this->blocks.end()) {
|
|
if (allocEndSuccessor->virt - allocEndPredecessor->virt < size ||
|
|
allocEndPredecessor->Mapped()) {
|
|
allocStart = allocEndPredecessor->virt;
|
|
break;
|
|
}
|
|
|
|
allocEndPredecessor = allocEndSuccessor++;
|
|
|
|
// Use the VA limit to calculate if we can fit in the final block since it has no
|
|
// successor
|
|
if (allocEndSuccessor == this->blocks.end()) {
|
|
allocEnd = allocEndPredecessor->virt + size;
|
|
|
|
if (allocEnd >= allocEndPredecessor->virt && allocEnd <= this->vaLimit)
|
|
allocStart = allocEndPredecessor->virt;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (allocStart != UnmappedVa) {
|
|
currentLinearAllocEnd = allocStart + size;
|
|
} else { // If linear allocation overflows the AS then find a gap
|
|
if (this->blocks.size() <= 2)
|
|
UNREACHABLE_MSG("Unexpected allocator state!");
|
|
|
|
auto searchPredecessor{this->blocks.begin()};
|
|
auto searchSuccessor{std::next(searchPredecessor)};
|
|
|
|
while (searchSuccessor != this->blocks.end() &&
|
|
(searchSuccessor->virt - searchPredecessor->virt < size ||
|
|
searchPredecessor->Mapped())) {
|
|
searchPredecessor = searchSuccessor++;
|
|
}
|
|
|
|
if (searchSuccessor != this->blocks.end())
|
|
allocStart = searchPredecessor->virt;
|
|
else
|
|
return {}; // AS is full
|
|
}
|
|
|
|
this->MapLocked(allocStart, true, size, {});
|
|
return allocStart;
|
|
}
|
|
|
|
ALLOC_MEMBER(void)::AllocateFixed(VaType virt, VaType size) {
|
|
this->Map(virt, true, size);
|
|
}
|
|
|
|
ALLOC_MEMBER(void)::Free(VaType virt, VaType size) {
|
|
this->Unmap(virt, size);
|
|
}
|
|
} // namespace Common
|