mirror of
https://github.com/Atmosphere-NX/Atmosphere
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259 lines
13 KiB
C++
259 lines
13 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <mesosphere.hpp>
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namespace ams::kern::init {
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#define SLAB_COUNT(CLASS) g_slab_resource_counts.num_##CLASS
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#define FOREACH_SLAB_TYPE(HANDLER, ...) \
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HANDLER(KProcess, (SLAB_COUNT(KProcess)), ## __VA_ARGS__) \
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HANDLER(KThread, (SLAB_COUNT(KThread)), ## __VA_ARGS__) \
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HANDLER(KEvent, (SLAB_COUNT(KEvent)), ## __VA_ARGS__) \
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HANDLER(KInterruptEvent, (SLAB_COUNT(KInterruptEvent)), ## __VA_ARGS__) \
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HANDLER(KPort, (SLAB_COUNT(KPort)), ## __VA_ARGS__) \
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HANDLER(KSharedMemory, (SLAB_COUNT(KSharedMemory)), ## __VA_ARGS__) \
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HANDLER(KSharedMemoryInfo, (SLAB_COUNT(KSharedMemory) * 8), ## __VA_ARGS__) \
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HANDLER(KTransferMemory, (SLAB_COUNT(KTransferMemory)), ## __VA_ARGS__) \
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HANDLER(KCodeMemory, (SLAB_COUNT(KCodeMemory)), ## __VA_ARGS__) \
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HANDLER(KDeviceAddressSpace, (SLAB_COUNT(KDeviceAddressSpace)), ## __VA_ARGS__) \
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HANDLER(KSession, (SLAB_COUNT(KSession)), ## __VA_ARGS__) \
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HANDLER(KSessionRequest, (SLAB_COUNT(KSession) * 2), ## __VA_ARGS__) \
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HANDLER(KLightSession, (SLAB_COUNT(KLightSession)), ## __VA_ARGS__) \
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HANDLER(KThreadLocalPage, (SLAB_COUNT(KProcess) + (SLAB_COUNT(KProcess) + SLAB_COUNT(KThread)) / 8), ## __VA_ARGS__) \
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HANDLER(KObjectName, (SLAB_COUNT(KObjectName)), ## __VA_ARGS__) \
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HANDLER(KResourceLimit, (SLAB_COUNT(KResourceLimit)), ## __VA_ARGS__) \
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HANDLER(KEventInfo, (SLAB_COUNT(KThread) + SLAB_COUNT(KDebug)), ## __VA_ARGS__) \
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HANDLER(KDebug, (SLAB_COUNT(KDebug)), ## __VA_ARGS__) \
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HANDLER(KIoPool, (SLAB_COUNT(KIoPool)), ## __VA_ARGS__) \
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HANDLER(KIoRegion, (SLAB_COUNT(KIoRegion)), ## __VA_ARGS__) \
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HANDLER(KSecureSystemResource, (SLAB_COUNT(KProcess)), ## __VA_ARGS__)
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namespace {
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#define DEFINE_SLAB_TYPE_ENUM_MEMBER(NAME, COUNT, ...) KSlabType_##NAME,
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enum KSlabType : u32 {
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FOREACH_SLAB_TYPE(DEFINE_SLAB_TYPE_ENUM_MEMBER)
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KSlabType_Count,
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};
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#undef DEFINE_SLAB_TYPE_ENUM_MEMBER
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/* Constexpr counts. */
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constexpr size_t SlabCountKProcess = 80;
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constexpr size_t SlabCountKThread = 800;
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constexpr size_t SlabCountKEvent = 900;
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constexpr size_t SlabCountKInterruptEvent = 100;
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constexpr size_t SlabCountKPort = 384;
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constexpr size_t SlabCountKSharedMemory = 80;
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constexpr size_t SlabCountKTransferMemory = 200;
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constexpr size_t SlabCountKCodeMemory = 10;
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constexpr size_t SlabCountKDeviceAddressSpace = 300;
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constexpr size_t SlabCountKSession = 1133;
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constexpr size_t SlabCountKLightSession = 100;
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constexpr size_t SlabCountKObjectName = 7;
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constexpr size_t SlabCountKResourceLimit = 5;
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constexpr size_t SlabCountKDebug = cpu::NumCores;
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constexpr size_t SlabCountKIoPool = 1;
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constexpr size_t SlabCountKIoRegion = 6;
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constexpr size_t SlabCountExtraKThread = (1024 + 256 + 256) - SlabCountKThread;
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namespace test {
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constexpr size_t RequiredSizeForExtraThreadCount = SlabCountExtraKThread * (sizeof(KThread) + (sizeof(KThreadLocalPage) / 8) + sizeof(KEventInfo));
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static_assert(RequiredSizeForExtraThreadCount <= KernelSlabHeapAdditionalSize);
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static_assert(KernelPageBufferHeapSize == 2 * PageSize + (SlabCountKProcess + SlabCountKThread + (SlabCountKProcess + SlabCountKThread) / 8) * PageSize);
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static_assert(KernelPageBufferAdditionalSize == (SlabCountExtraKThread + (SlabCountExtraKThread / 8)) * PageSize);
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}
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/* Global to hold our resource counts. */
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constinit KSlabResourceCounts g_slab_resource_counts = {
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.num_KProcess = SlabCountKProcess,
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.num_KThread = SlabCountKThread,
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.num_KEvent = SlabCountKEvent,
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.num_KInterruptEvent = SlabCountKInterruptEvent,
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.num_KPort = SlabCountKPort,
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.num_KSharedMemory = SlabCountKSharedMemory,
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.num_KTransferMemory = SlabCountKTransferMemory,
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.num_KCodeMemory = SlabCountKCodeMemory,
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.num_KDeviceAddressSpace = SlabCountKDeviceAddressSpace,
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.num_KSession = SlabCountKSession,
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.num_KLightSession = SlabCountKLightSession,
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.num_KObjectName = SlabCountKObjectName,
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.num_KResourceLimit = SlabCountKResourceLimit,
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.num_KDebug = SlabCountKDebug,
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.num_KIoPool = SlabCountKIoPool,
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.num_KIoRegion = SlabCountKIoRegion,
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};
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template<typename T>
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NOINLINE KVirtualAddress InitializeSlabHeap(KVirtualAddress address, size_t num_objects) {
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const size_t size = util::AlignUp(sizeof(T) * num_objects, alignof(void *));
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KVirtualAddress start = util::AlignUp(GetInteger(address), alignof(T));
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if (size > 0) {
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const KMemoryRegion *region = KMemoryLayout::Find(start + size - 1);
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MESOSPHERE_ABORT_UNLESS(region != nullptr);
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MESOSPHERE_ABORT_UNLESS(region->IsDerivedFrom(KMemoryRegionType_KernelSlab));
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T::InitializeSlabHeap(GetVoidPointer(start), size);
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}
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return start + size;
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}
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}
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const KSlabResourceCounts &GetSlabResourceCounts() {
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return g_slab_resource_counts;
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}
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void InitializeSlabResourceCounts() {
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/* Note: Nintendo initializes all fields here, but we initialize all constants at compile-time. */
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if (KSystemControl::Init::ShouldIncreaseThreadResourceLimit()) {
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g_slab_resource_counts.num_KThread += SlabCountExtraKThread;
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}
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}
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size_t CalculateSlabHeapGapSize() {
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constexpr size_t KernelSlabHeapGapSize = 2_MB - 320_KB;
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static_assert(KernelSlabHeapGapSize <= KernelSlabHeapGapsSizeMax);
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return KernelSlabHeapGapSize;
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}
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size_t CalculateTotalSlabHeapSize() {
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size_t size = 0;
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#define ADD_SLAB_SIZE(NAME, COUNT, ...) ({ \
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size += alignof(NAME); \
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size += util::AlignUp(sizeof(NAME) * (COUNT), alignof(void *)); \
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});
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/* Add the size required for each slab. */
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FOREACH_SLAB_TYPE(ADD_SLAB_SIZE)
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#undef ADD_SLAB_SIZE
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/* Add the reserved size. */
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size += CalculateSlabHeapGapSize();
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return size;
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}
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void InitializeSlabHeaps() {
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/* Get the slab region, since that's where we'll be working. */
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const KMemoryRegion &slab_region = KMemoryLayout::GetSlabRegion();
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KVirtualAddress address = slab_region.GetAddress();
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/* Initialize slab type array to be in sorted order. */
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KSlabType slab_types[KSlabType_Count];
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for (size_t i = 0; i < util::size(slab_types); i++) { slab_types[i] = static_cast<KSlabType>(i); }
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/* N shuffles the slab type array with the following simple algorithm. */
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for (size_t i = 0; i < util::size(slab_types); i++) {
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const size_t rnd = KSystemControl::GenerateRandomRange(0, util::size(slab_types) - 1);
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std::swap(slab_types[i], slab_types[rnd]);
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}
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/* Create an array to represent the gaps between the slabs. */
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const size_t total_gap_size = CalculateSlabHeapGapSize();
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size_t slab_gaps[util::size(slab_types)];
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for (size_t i = 0; i < util::size(slab_gaps); i++) {
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/* Note: This is an off-by-one error from Nintendo's intention, because GenerateRandomRange is inclusive. */
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/* However, Nintendo also has the off-by-one error, and it's "harmless", so we will include it ourselves. */
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slab_gaps[i] = KSystemControl::GenerateRandomRange(0, total_gap_size);
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}
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/* Sort the array, so that we can treat differences between values as offsets to the starts of slabs. */
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for (size_t i = 1; i < util::size(slab_gaps); i++) {
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for (size_t j = i; j > 0 && slab_gaps[j-1] > slab_gaps[j]; j--) {
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std::swap(slab_gaps[j], slab_gaps[j-1]);
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}
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}
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/* Track the gaps, so that we can free them to the unused slab tree. */
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KVirtualAddress gap_start = address;
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size_t gap_size = 0;
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for (size_t i = 0; i < util::size(slab_types); i++) {
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/* Add the random gap to the address. */
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const auto cur_gap = (i == 0) ? slab_gaps[0] : slab_gaps[i] - slab_gaps[i - 1];
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address += cur_gap;
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gap_size += cur_gap;
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#define INITIALIZE_SLAB_HEAP(NAME, COUNT, ...) \
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case KSlabType_##NAME: \
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if (COUNT > 0) { \
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address = InitializeSlabHeap<NAME>(address, COUNT); \
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} \
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break;
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/* Initialize the slabheap. */
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switch (slab_types[i]) {
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/* For each of the slab types, we want to initialize that heap. */
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FOREACH_SLAB_TYPE(INITIALIZE_SLAB_HEAP)
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/* If we somehow get an invalid type, abort. */
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MESOSPHERE_UNREACHABLE_DEFAULT_CASE();
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}
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/* If we've hit the end of a gap, free it. */
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if (gap_start + gap_size != address) {
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FreeUnusedSlabMemory(gap_start, gap_size);
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gap_start = address;
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gap_size = 0;
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}
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}
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/* Free the end of the slab region. */
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FreeUnusedSlabMemory(gap_start, gap_size + (slab_region.GetEndAddress() - GetInteger(address)));
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}
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}
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namespace ams::kern {
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void KPageBufferSlabHeap::Initialize(KDynamicPageManager &allocator) {
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/* Get slab resource counts. */
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const auto &counts = init::GetSlabResourceCounts();
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/* If size is correct, account for thread local pages. */
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if (BufferSize == PageSize) {
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s_buffer_count += counts.num_KProcess + counts.num_KThread + (counts.num_KProcess + counts.num_KThread) / 8;
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}
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/* Set our object size. */
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m_obj_size = BufferSize;
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/* Initialize the base allocator. */
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KSlabHeapImpl::Initialize();
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/* Allocate the desired page count. */
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for (size_t i = 0; i < s_buffer_count; ++i) {
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/* Allocate an appropriate buffer. */
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auto * const pb = (BufferSize <= PageSize) ? allocator.Allocate() : allocator.Allocate(BufferSize / PageSize);
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MESOSPHERE_ABORT_UNLESS(pb != nullptr);
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/* Free to our slab. */
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KSlabHeapImpl::Free(pb);
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}
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}
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}
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