255 lines
8.6 KiB
C++
255 lines
8.6 KiB
C++
// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include <random>
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#include "common/literals.h"
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#include "common/settings.h"
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#include "kernel/board/nintendo/nx/k_system_control.h"
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#include "kernel/board/nintendo/nx/secure_monitor.h"
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#include "kernel/k_memory_manager.h"
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#include "kernel/k_page_table.h"
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#include "kernel/k_trace.h"
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#include "kernel/kernel.h"
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#include "kernel/svc_results.h"
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namespace Kernel::Board::Nintendo::Nx {
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namespace impl {
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using namespace Common::Literals;
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constexpr const std::size_t RequiredNonSecureSystemMemorySizeVi = 0x2280 * 4_KiB;
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constexpr const std::size_t RequiredNonSecureSystemMemorySizeViFatal = 0x200 * 4_KiB;
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constexpr const std::size_t RequiredNonSecureSystemMemorySizeNvservices = 0x704 * 4_KiB;
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constexpr const std::size_t RequiredNonSecureSystemMemorySizeMisc = 0x80 * 4_KiB;
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} // namespace impl
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constexpr const std::size_t RequiredNonSecureSystemMemorySize =
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impl::RequiredNonSecureSystemMemorySizeVi + impl::RequiredNonSecureSystemMemorySizeNvservices +
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impl::RequiredNonSecureSystemMemorySizeMisc;
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constexpr const std::size_t RequiredNonSecureSystemMemorySizeWithFatal =
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RequiredNonSecureSystemMemorySize + impl::RequiredNonSecureSystemMemorySizeViFatal;
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constexpr const std::size_t SecureAlignment = 128_KiB;
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namespace {
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using namespace Common::Literals;
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u32 GetMemorySizeForInit() {
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switch (Settings::values.memory_layout_mode.GetValue()) {
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case Settings::MemoryLayout::Memory_4Gb:
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return Smc::MemorySize_4GB;
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case Settings::MemoryLayout::Memory_6Gb:
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return Smc::MemorySize_6GB;
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case Settings::MemoryLayout::Memory_8Gb:
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return Smc::MemorySize_8GB;
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}
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return Smc::MemorySize_4GB;
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}
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Smc::MemoryArrangement GetMemoryArrangeForInit() {
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switch (Settings::values.memory_layout_mode.GetValue()) {
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case Settings::MemoryLayout::Memory_4Gb:
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return Smc::MemoryArrangement_4GB;
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case Settings::MemoryLayout::Memory_6Gb:
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return Smc::MemoryArrangement_6GB;
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case Settings::MemoryLayout::Memory_8Gb:
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return Smc::MemoryArrangement_8GB;
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}
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return Smc::MemoryArrangement_4GB;
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}
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} // namespace
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size_t KSystemControl::Init::GetRealMemorySize() {
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return GetIntendedMemorySize();
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}
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// Initialization.
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size_t KSystemControl::Init::GetIntendedMemorySize() {
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switch (GetMemorySizeForInit()) {
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case Smc::MemorySize_4GB:
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default: // All invalid modes should go to 4GB.
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return 4_GiB;
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case Smc::MemorySize_6GB:
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return 6_GiB;
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case Smc::MemorySize_8GB:
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return 8_GiB;
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}
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}
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KPhysicalAddress KSystemControl::Init::GetKernelPhysicalBaseAddress(KPhysicalAddress base_address) {
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const size_t real_dram_size = KSystemControl::Init::GetRealMemorySize();
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const size_t intended_dram_size = KSystemControl::Init::GetIntendedMemorySize();
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if (intended_dram_size * 2 < real_dram_size) {
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return base_address;
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} else {
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return base_address + ((real_dram_size - intended_dram_size) / 2);
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}
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}
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bool KSystemControl::Init::ShouldIncreaseThreadResourceLimit() {
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return true;
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}
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std::size_t KSystemControl::Init::GetApplicationPoolSize() {
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// Get the base pool size.
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const size_t base_pool_size = []() -> size_t {
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switch (GetMemoryArrangeForInit()) {
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case Smc::MemoryArrangement_4GB:
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default:
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return 3285_MiB;
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case Smc::MemoryArrangement_4GBForAppletDev:
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return 2048_MiB;
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case Smc::MemoryArrangement_4GBForSystemDev:
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return 3285_MiB;
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case Smc::MemoryArrangement_6GB:
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return 4916_MiB;
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case Smc::MemoryArrangement_6GBForAppletDev:
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return 3285_MiB;
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case Smc::MemoryArrangement_8GB:
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// Real kernel sets this to 4916_MiB. We are not debugging applets.
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return 6547_MiB;
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}
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}();
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// Return (possibly) adjusted size.
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return base_pool_size;
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}
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size_t KSystemControl::Init::GetAppletPoolSize() {
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// Get the base pool size.
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const size_t base_pool_size = []() -> size_t {
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switch (GetMemoryArrangeForInit()) {
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case Smc::MemoryArrangement_4GB:
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default:
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return 507_MiB;
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case Smc::MemoryArrangement_4GBForAppletDev:
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return 1554_MiB;
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case Smc::MemoryArrangement_4GBForSystemDev:
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return 448_MiB;
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case Smc::MemoryArrangement_6GB:
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return 562_MiB;
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case Smc::MemoryArrangement_6GBForAppletDev:
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return 2193_MiB;
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case Smc::MemoryArrangement_8GB:
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//! Real kernel sets this to 2193_MiB. We are not debugging applets.
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return 562_MiB;
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}
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}();
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// Return (possibly) adjusted size.
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constexpr size_t ExtraSystemMemoryForAtmosphere = 33_MiB;
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return base_pool_size - ExtraSystemMemoryForAtmosphere - KTraceBufferSize;
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}
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size_t KSystemControl::Init::GetMinimumNonSecureSystemPoolSize() {
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// Verify that our minimum is at least as large as Nintendo's.
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constexpr size_t MinimumSizeWithFatal = RequiredNonSecureSystemMemorySizeWithFatal;
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static_assert(MinimumSizeWithFatal >= 0x2C04000);
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constexpr size_t MinimumSizeWithoutFatal = RequiredNonSecureSystemMemorySize;
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static_assert(MinimumSizeWithoutFatal >= 0x2A00000);
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return MinimumSizeWithFatal;
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}
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namespace {
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template <typename F>
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u64 GenerateUniformRange(u64 min, u64 max, F f) {
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// Handle the case where the difference is too large to represent.
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if (max == std::numeric_limits<u64>::max() && min == std::numeric_limits<u64>::min()) {
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return f();
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}
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// Iterate until we get a value in range.
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const u64 range_size = ((max + 1) - min);
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const u64 effective_max = (std::numeric_limits<u64>::max() / range_size) * range_size;
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while (true) {
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if (const u64 rnd = f(); rnd < effective_max) {
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return min + (rnd % range_size);
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}
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}
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}
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} // Anonymous namespace
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u64 KSystemControl::GenerateRandomU64() {
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std::random_device device;
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std::mt19937 gen(device());
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std::uniform_int_distribution<u64> distribution(1, std::numeric_limits<u64>::max());
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return distribution(gen);
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}
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u64 KSystemControl::GenerateRandomRange(u64 min, u64 max) {
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return GenerateUniformRange(min, max, GenerateRandomU64);
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}
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size_t KSystemControl::CalculateRequiredSecureMemorySize(size_t size, u32 pool) {
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if (pool == static_cast<u32>(KMemoryManager::Pool::Applet)) {
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return 0;
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} else {
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// return KSystemControlBase::CalculateRequiredSecureMemorySize(size, pool);
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return size;
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}
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}
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Result KSystemControl::AllocateSecureMemory(KernelCore& kernel, KVirtualAddress* out, size_t size,
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u32 pool) {
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// Applet secure memory is handled separately.
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UNIMPLEMENTED_IF(pool == static_cast<u32>(KMemoryManager::Pool::Applet));
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// Ensure the size is aligned.
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const size_t alignment =
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(pool == static_cast<u32>(KMemoryManager::Pool::System) ? PageSize : SecureAlignment);
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R_UNLESS(Common::IsAligned(size, alignment), ResultInvalidSize);
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// Allocate the memory.
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const size_t num_pages = size / PageSize;
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const KPhysicalAddress paddr = kernel.MemoryManager().AllocateAndOpenContinuous(
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num_pages, alignment / PageSize,
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KMemoryManager::EncodeOption(static_cast<KMemoryManager::Pool>(pool),
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KMemoryManager::Direction::FromFront));
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R_UNLESS(paddr != 0, ResultOutOfMemory);
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// Ensure we don't leak references to the memory on error.
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ON_RESULT_FAILURE {
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kernel.MemoryManager().Close(paddr, num_pages);
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};
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// We succeeded.
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*out = KPageTable::GetHeapVirtualAddress(kernel, paddr);
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R_SUCCEED();
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}
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void KSystemControl::FreeSecureMemory(KernelCore& kernel, KVirtualAddress address, size_t size,
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u32 pool) {
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// Applet secure memory is handled separately.
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UNIMPLEMENTED_IF(pool == static_cast<u32>(KMemoryManager::Pool::Applet));
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// Ensure the size is aligned.
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const size_t alignment =
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(pool == static_cast<u32>(KMemoryManager::Pool::System) ? PageSize : SecureAlignment);
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ASSERT(Common::IsAligned(GetInteger(address), alignment));
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ASSERT(Common::IsAligned(size, alignment));
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// Close the secure region's pages.
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kernel.MemoryManager().Close(KPageTable::GetHeapPhysicalAddress(kernel, address),
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size / PageSize);
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}
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// Insecure Memory.
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KResourceLimit* KSystemControl::GetInsecureMemoryResourceLimit(KernelCore& kernel) {
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return kernel.GetSystemResourceLimit();
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}
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u32 KSystemControl::GetInsecureMemoryPool() {
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return static_cast<u32>(KMemoryManager::Pool::SystemNonSecure);
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}
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} // namespace Kernel::Board::Nintendo::Nx
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