mirror of
https://git.suyu.dev/suyu/suyu
synced 2024-11-01 12:57:52 +00:00
kernel: memory: Add PageHeap class, to manage a heap of pages.
This commit is contained in:
bunnei
parent
dc720311cc
commit
3927012734
3 changed files with 483 additions and 0 deletions
|
|
@ -159,6 +159,8 @@ add_library(core STATIC
|
|||
hle/kernel/memory/memory_block.h
|
||||
hle/kernel/memory/memory_types.h
|
||||
hle/kernel/memory/page_linked_list.h
|
||||
hle/kernel/memory/page_heap.cpp
|
||||
hle/kernel/memory/page_heap.h
|
||||
hle/kernel/memory/slab_heap.h
|
||||
hle/kernel/memory/system_control.cpp
|
||||
hle/kernel/memory/system_control.h
|
||||
|
|
|
|||
116
src/core/hle/kernel/memory/page_heap.cpp
Normal file
116
src/core/hle/kernel/memory/page_heap.cpp
Normal file
|
|
@ -0,0 +1,116 @@
|
|||
// Copyright 2020 yuzu Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#include "core/core.h"
|
||||
#include "core/hle/kernel/memory/page_heap.h"
|
||||
#include "core/memory.h"
|
||||
|
||||
namespace Kernel::Memory {
|
||||
|
||||
void PageHeap::Initialize(VAddr address, std::size_t size, std::size_t metadata_size) {
|
||||
// Check our assumptions
|
||||
ASSERT(Common::IsAligned((address), PageSize));
|
||||
ASSERT(Common::IsAligned(size, PageSize));
|
||||
|
||||
// Set our members
|
||||
heap_address = address;
|
||||
heap_size = size;
|
||||
|
||||
// Setup bitmaps
|
||||
metadata.resize(metadata_size / sizeof(u64));
|
||||
u64* cur_bitmap_storage{metadata.data()};
|
||||
for (std::size_t i = 0; i < MemoryBlockPageShifts.size(); i++) {
|
||||
const std::size_t cur_block_shift{MemoryBlockPageShifts[i]};
|
||||
const std::size_t next_block_shift{
|
||||
(i != MemoryBlockPageShifts.size() - 1) ? MemoryBlockPageShifts[i + 1] : 0};
|
||||
cur_bitmap_storage = blocks[i].Initialize(heap_address, heap_size, cur_block_shift,
|
||||
next_block_shift, cur_bitmap_storage);
|
||||
}
|
||||
}
|
||||
|
||||
VAddr PageHeap::AllocateBlock(s32 index) {
|
||||
const std::size_t needed_size{blocks[index].GetSize()};
|
||||
|
||||
for (s32 i{index}; i < static_cast<s32>(MemoryBlockPageShifts.size()); i++) {
|
||||
if (const VAddr addr{blocks[i].PopBlock()}; addr) {
|
||||
if (const std::size_t allocated_size{blocks[i].GetSize()};
|
||||
allocated_size > needed_size) {
|
||||
Free(addr + needed_size, (allocated_size - needed_size) / PageSize);
|
||||
}
|
||||
return addr;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void PageHeap::FreeBlock(VAddr block, s32 index) {
|
||||
do {
|
||||
block = blocks[index++].PushBlock(block);
|
||||
} while (block != 0);
|
||||
}
|
||||
|
||||
void PageHeap::Free(VAddr addr, std::size_t num_pages) {
|
||||
// Freeing no pages is a no-op
|
||||
if (num_pages == 0) {
|
||||
return;
|
||||
}
|
||||
|
||||
// Find the largest block size that we can free, and free as many as possible
|
||||
s32 big_index{static_cast<s32>(MemoryBlockPageShifts.size()) - 1};
|
||||
const VAddr start{addr};
|
||||
const VAddr end{(num_pages * PageSize) + addr};
|
||||
VAddr before_start{start};
|
||||
VAddr before_end{start};
|
||||
VAddr after_start{end};
|
||||
VAddr after_end{end};
|
||||
while (big_index >= 0) {
|
||||
const std::size_t block_size{blocks[big_index].GetSize()};
|
||||
const VAddr big_start{Common::AlignUp((start), block_size)};
|
||||
const VAddr big_end{Common::AlignDown((end), block_size)};
|
||||
if (big_start < big_end) {
|
||||
// Free as many big blocks as we can
|
||||
for (auto block{big_start}; block < big_end; block += block_size) {
|
||||
FreeBlock(block, big_index);
|
||||
}
|
||||
before_end = big_start;
|
||||
after_start = big_end;
|
||||
break;
|
||||
}
|
||||
big_index--;
|
||||
}
|
||||
ASSERT(big_index >= 0);
|
||||
|
||||
// Free space before the big blocks
|
||||
for (s32 i{big_index - 1}; i >= 0; i--) {
|
||||
const std::size_t block_size{blocks[i].GetSize()};
|
||||
while (before_start + block_size <= before_end) {
|
||||
before_end -= block_size;
|
||||
FreeBlock(before_end, i);
|
||||
}
|
||||
}
|
||||
|
||||
// Free space after the big blocks
|
||||
for (s32 i{big_index - 1}; i >= 0; i--) {
|
||||
const std::size_t block_size{blocks[i].GetSize()};
|
||||
while (after_start + block_size <= after_end) {
|
||||
FreeBlock(after_start, i);
|
||||
after_start += block_size;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
std::size_t PageHeap::CalculateMetadataOverheadSize(std::size_t region_size) {
|
||||
std::size_t overhead_size = 0;
|
||||
for (std::size_t i = 0; i < MemoryBlockPageShifts.size(); i++) {
|
||||
const std::size_t cur_block_shift{MemoryBlockPageShifts[i]};
|
||||
const std::size_t next_block_shift{
|
||||
(i != MemoryBlockPageShifts.size() - 1) ? MemoryBlockPageShifts[i + 1] : 0};
|
||||
overhead_size += PageHeap::Block::CalculateMetadataOverheadSize(
|
||||
region_size, cur_block_shift, next_block_shift);
|
||||
}
|
||||
return Common::AlignUp(overhead_size, PageSize);
|
||||
}
|
||||
|
||||
} // namespace Kernel::Memory
|
||||
365
src/core/hle/kernel/memory/page_heap.h
Normal file
365
src/core/hle/kernel/memory/page_heap.h
Normal file
|
|
@ -0,0 +1,365 @@
|
|||
// Copyright 2020 yuzu Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <array>
|
||||
#include <vector>
|
||||
|
||||
#include "common/alignment.h"
|
||||
#include "common/assert.h"
|
||||
#include "common/bit_util.h"
|
||||
#include "common/common_funcs.h"
|
||||
#include "common/common_types.h"
|
||||
#include "core/hle/kernel/memory/memory_types.h"
|
||||
|
||||
namespace Kernel::Memory {
|
||||
|
||||
class PageHeap final : NonCopyable {
|
||||
public:
|
||||
static constexpr s32 GetAlignedBlockIndex(std::size_t num_pages, std::size_t align_pages) {
|
||||
const std::size_t target_pages{std::max(num_pages, align_pages)};
|
||||
for (std::size_t i = 0; i < NumMemoryBlockPageShifts; i++) {
|
||||
if (target_pages <= (std::size_t(1) << MemoryBlockPageShifts[i]) / PageSize) {
|
||||
return static_cast<s32>(i);
|
||||
}
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
static constexpr s32 GetBlockIndex(std::size_t num_pages) {
|
||||
for (s32 i{static_cast<s32>(NumMemoryBlockPageShifts) - 1}; i >= 0; i--) {
|
||||
if (num_pages >= (std::size_t(1) << MemoryBlockPageShifts[i]) / PageSize) {
|
||||
return i;
|
||||
}
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
static constexpr std::size_t GetBlockSize(std::size_t index) {
|
||||
return std::size_t(1) << MemoryBlockPageShifts[index];
|
||||
}
|
||||
|
||||
static constexpr std::size_t GetBlockNumPages(std::size_t index) {
|
||||
return GetBlockSize(index) / PageSize;
|
||||
}
|
||||
|
||||
private:
|
||||
static constexpr std::size_t NumMemoryBlockPageShifts{7};
|
||||
static constexpr std::array<std::size_t, NumMemoryBlockPageShifts> MemoryBlockPageShifts{
|
||||
0xC, 0x10, 0x15, 0x16, 0x19, 0x1D, 0x1E};
|
||||
|
||||
class Block final : NonCopyable {
|
||||
private:
|
||||
class Bitmap final : NonCopyable {
|
||||
public:
|
||||
static constexpr std::size_t MaxDepth{4};
|
||||
|
||||
private:
|
||||
std::array<u64*, MaxDepth> bit_storages{};
|
||||
std::size_t num_bits{};
|
||||
std::size_t used_depths{};
|
||||
|
||||
public:
|
||||
constexpr Bitmap() = default;
|
||||
|
||||
constexpr std::size_t GetNumBits() const {
|
||||
return num_bits;
|
||||
}
|
||||
constexpr s32 GetHighestDepthIndex() const {
|
||||
return static_cast<s32>(used_depths) - 1;
|
||||
}
|
||||
|
||||
constexpr u64* Initialize(u64* storage, std::size_t size) {
|
||||
//* Initially, everything is un-set
|
||||
num_bits = 0;
|
||||
|
||||
// Calculate the needed bitmap depth
|
||||
used_depths = static_cast<std::size_t>(GetRequiredDepth(size));
|
||||
ASSERT(used_depths <= MaxDepth);
|
||||
|
||||
// Set the bitmap pointers
|
||||
for (s32 depth{GetHighestDepthIndex()}; depth >= 0; depth--) {
|
||||
bit_storages[depth] = storage;
|
||||
size = Common::AlignUp(size, 64) / 64;
|
||||
storage += size;
|
||||
}
|
||||
|
||||
return storage;
|
||||
}
|
||||
|
||||
s64 FindFreeBlock() const {
|
||||
uintptr_t offset{};
|
||||
s32 depth{};
|
||||
|
||||
do {
|
||||
const u64 v{bit_storages[depth][offset]};
|
||||
if (v == 0) {
|
||||
// Non-zero depth indicates that a previous level had a free block
|
||||
ASSERT(depth == 0);
|
||||
return -1;
|
||||
}
|
||||
offset = offset * 64 + Common::CountTrailingZeroes64(v);
|
||||
++depth;
|
||||
} while (depth < static_cast<s32>(used_depths));
|
||||
|
||||
return static_cast<s64>(offset);
|
||||
}
|
||||
|
||||
constexpr void SetBit(std::size_t offset) {
|
||||
SetBit(GetHighestDepthIndex(), offset);
|
||||
num_bits++;
|
||||
}
|
||||
|
||||
constexpr void ClearBit(std::size_t offset) {
|
||||
ClearBit(GetHighestDepthIndex(), offset);
|
||||
num_bits--;
|
||||
}
|
||||
|
||||
constexpr bool ClearRange(std::size_t offset, std::size_t count) {
|
||||
const s32 depth{GetHighestDepthIndex()};
|
||||
const std::size_t bit_ind{offset / 64};
|
||||
u64* bits{bit_storages[depth]};
|
||||
if (count < 64) {
|
||||
const std::size_t shift{offset % 64};
|
||||
ASSERT(shift + count <= 64);
|
||||
// Check that all the bits are set
|
||||
const u64 mask{((u64(1) << count) - 1) << shift};
|
||||
u64 v{bits[bit_ind]};
|
||||
if ((v & mask) != mask) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// Clear the bits
|
||||
v &= ~mask;
|
||||
bits[bit_ind] = v;
|
||||
if (v == 0) {
|
||||
ClearBit(depth - 1, bit_ind);
|
||||
}
|
||||
} else {
|
||||
ASSERT(offset % 64 == 0);
|
||||
ASSERT(count % 64 == 0);
|
||||
// Check that all the bits are set
|
||||
std::size_t remaining{count};
|
||||
std::size_t i = 0;
|
||||
do {
|
||||
if (bits[bit_ind + i++] != ~u64(0)) {
|
||||
return false;
|
||||
}
|
||||
remaining -= 64;
|
||||
} while (remaining > 0);
|
||||
|
||||
// Clear the bits
|
||||
remaining = count;
|
||||
i = 0;
|
||||
do {
|
||||
bits[bit_ind + i] = 0;
|
||||
ClearBit(depth - 1, bit_ind + i);
|
||||
i++;
|
||||
remaining -= 64;
|
||||
} while (remaining > 0);
|
||||
}
|
||||
|
||||
num_bits -= count;
|
||||
return true;
|
||||
}
|
||||
|
||||
private:
|
||||
constexpr void SetBit(s32 depth, std::size_t offset) {
|
||||
while (depth >= 0) {
|
||||
const std::size_t ind{offset / 64};
|
||||
const std::size_t which{offset % 64};
|
||||
const u64 mask{u64(1) << which};
|
||||
|
||||
u64* bit{std::addressof(bit_storages[depth][ind])};
|
||||
const u64 v{*bit};
|
||||
ASSERT((v & mask) == 0);
|
||||
*bit = v | mask;
|
||||
if (v) {
|
||||
break;
|
||||
}
|
||||
offset = ind;
|
||||
depth--;
|
||||
}
|
||||
}
|
||||
|
||||
constexpr void ClearBit(s32 depth, std::size_t offset) {
|
||||
while (depth >= 0) {
|
||||
const std::size_t ind{offset / 64};
|
||||
const std::size_t which{offset % 64};
|
||||
const u64 mask{u64(1) << which};
|
||||
|
||||
u64* bit{std::addressof(bit_storages[depth][ind])};
|
||||
u64 v{*bit};
|
||||
ASSERT((v & mask) != 0);
|
||||
v &= ~mask;
|
||||
*bit = v;
|
||||
if (v) {
|
||||
break;
|
||||
}
|
||||
offset = ind;
|
||||
depth--;
|
||||
}
|
||||
}
|
||||
|
||||
private:
|
||||
static constexpr s32 GetRequiredDepth(std::size_t region_size) {
|
||||
s32 depth = 0;
|
||||
while (true) {
|
||||
region_size /= 64;
|
||||
depth++;
|
||||
if (region_size == 0) {
|
||||
return depth;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
public:
|
||||
static constexpr std::size_t CalculateMetadataOverheadSize(std::size_t region_size) {
|
||||
std::size_t overhead_bits = 0;
|
||||
for (s32 depth{GetRequiredDepth(region_size) - 1}; depth >= 0; depth--) {
|
||||
region_size = Common::AlignUp(region_size, 64) / 64;
|
||||
overhead_bits += region_size;
|
||||
}
|
||||
return overhead_bits * sizeof(u64);
|
||||
}
|
||||
};
|
||||
|
||||
private:
|
||||
Bitmap bitmap;
|
||||
VAddr heap_address{};
|
||||
uintptr_t end_offset{};
|
||||
std::size_t block_shift{};
|
||||
std::size_t next_block_shift{};
|
||||
|
||||
public:
|
||||
constexpr Block() = default;
|
||||
|
||||
constexpr std::size_t GetShift() const {
|
||||
return block_shift;
|
||||
}
|
||||
constexpr std::size_t GetNextShift() const {
|
||||
return next_block_shift;
|
||||
}
|
||||
constexpr std::size_t GetSize() const {
|
||||
return std::size_t(1) << GetShift();
|
||||
}
|
||||
constexpr std::size_t GetNumPages() const {
|
||||
return GetSize() / PageSize;
|
||||
}
|
||||
constexpr std::size_t GetNumFreeBlocks() const {
|
||||
return bitmap.GetNumBits();
|
||||
}
|
||||
constexpr std::size_t GetNumFreePages() const {
|
||||
return GetNumFreeBlocks() * GetNumPages();
|
||||
}
|
||||
|
||||
constexpr u64* Initialize(VAddr addr, std::size_t size, std::size_t bs, std::size_t nbs,
|
||||
u64* bit_storage) {
|
||||
// Set shifts
|
||||
block_shift = bs;
|
||||
next_block_shift = nbs;
|
||||
|
||||
// Align up the address
|
||||
VAddr end{addr + size};
|
||||
const std::size_t align{(next_block_shift != 0) ? (u64(1) << next_block_shift)
|
||||
: (u64(1) << block_shift)};
|
||||
addr = Common::AlignDown((addr), align);
|
||||
end = Common::AlignUp((end), align);
|
||||
|
||||
heap_address = addr;
|
||||
end_offset = (end - addr) / (u64(1) << block_shift);
|
||||
return bitmap.Initialize(bit_storage, end_offset);
|
||||
}
|
||||
|
||||
constexpr VAddr PushBlock(VAddr address) {
|
||||
// Set the bit for the free block
|
||||
std::size_t offset{(address - heap_address) >> GetShift()};
|
||||
bitmap.SetBit(offset);
|
||||
|
||||
// If we have a next shift, try to clear the blocks below and return the address
|
||||
if (GetNextShift()) {
|
||||
const std::size_t diff{u64(1) << (GetNextShift() - GetShift())};
|
||||
offset = Common::AlignDown(offset, diff);
|
||||
if (bitmap.ClearRange(offset, diff)) {
|
||||
return heap_address + (offset << GetShift());
|
||||
}
|
||||
}
|
||||
|
||||
// We couldn't coalesce, or we're already as big as possible
|
||||
return 0;
|
||||
}
|
||||
|
||||
VAddr PopBlock() {
|
||||
// Find a free block
|
||||
const s64 soffset{bitmap.FindFreeBlock()};
|
||||
if (soffset < 0) {
|
||||
return 0;
|
||||
}
|
||||
const std::size_t offset{static_cast<std::size_t>(soffset)};
|
||||
|
||||
// Update our tracking and return it
|
||||
bitmap.ClearBit(offset);
|
||||
return heap_address + (offset << GetShift());
|
||||
}
|
||||
|
||||
public:
|
||||
static constexpr std::size_t CalculateMetadataOverheadSize(std::size_t region_size,
|
||||
std::size_t cur_block_shift,
|
||||
std::size_t next_block_shift) {
|
||||
const std::size_t cur_block_size{(u64(1) << cur_block_shift)};
|
||||
const std::size_t next_block_size{(u64(1) << next_block_shift)};
|
||||
const std::size_t align{(next_block_shift != 0) ? next_block_size : cur_block_size};
|
||||
return Bitmap::CalculateMetadataOverheadSize(
|
||||
(align * 2 + Common::AlignUp(region_size, align)) / cur_block_size);
|
||||
}
|
||||
};
|
||||
|
||||
public:
|
||||
PageHeap() = default;
|
||||
|
||||
constexpr VAddr GetAddress() const {
|
||||
return heap_address;
|
||||
}
|
||||
constexpr std::size_t GetSize() const {
|
||||
return heap_size;
|
||||
}
|
||||
constexpr VAddr GetEndAddress() const {
|
||||
return GetAddress() + GetSize();
|
||||
}
|
||||
constexpr std::size_t GetPageOffset(VAddr block) const {
|
||||
return (block - GetAddress()) / PageSize;
|
||||
}
|
||||
|
||||
void Initialize(VAddr heap_address, std::size_t heap_size, std::size_t metadata_size);
|
||||
VAddr AllocateBlock(s32 index);
|
||||
void Free(VAddr addr, std::size_t num_pages);
|
||||
|
||||
void UpdateUsedSize() {
|
||||
used_size = heap_size - (GetNumFreePages() * PageSize);
|
||||
}
|
||||
|
||||
static std::size_t CalculateMetadataOverheadSize(std::size_t region_size);
|
||||
|
||||
private:
|
||||
constexpr std::size_t GetNumFreePages() const {
|
||||
std::size_t num_free{};
|
||||
|
||||
for (const auto& block : blocks) {
|
||||
num_free += block.GetNumFreePages();
|
||||
}
|
||||
|
||||
return num_free;
|
||||
}
|
||||
|
||||
void FreeBlock(VAddr block, s32 index);
|
||||
|
||||
VAddr heap_address{};
|
||||
std::size_t heap_size{};
|
||||
std::size_t used_size{};
|
||||
std::array<Block, NumMemoryBlockPageShifts> blocks{};
|
||||
std::vector<u64> metadata;
|
||||
};
|
||||
|
||||
} // namespace Kernel::Memory
|
||||
Loading…
Reference in a new issue