mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2025-11-03 20:41:17 +01:00
110 lines
4.7 KiB
C++
110 lines
4.7 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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#pragma once
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#include <mesosphere/kern_common.hpp>
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#include <mesosphere/kern_k_spin_lock.hpp>
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namespace ams::kern {
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struct InitialProcessBinaryLayout;
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}
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namespace ams::kern {
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class KSystemControlBase {
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protected:
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/* Nintendo uses std::mt19937_t for randomness. */
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/* To save space (and because mt19337_t isn't secure anyway), */
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/* We will use TinyMT. */
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static constinit inline bool s_initialized_random_generator;
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static constinit inline util::TinyMT s_random_generator{util::ConstantInitialize};
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static constinit inline KSpinLock s_random_lock;
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public:
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class Init {
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public:
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/* Initialization. */
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static size_t GetRealMemorySize();
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static size_t GetIntendedMemorySize();
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static KPhysicalAddress GetKernelPhysicalBaseAddress(KPhysicalAddress base_address);
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static void GetInitialProcessBinaryLayout(InitialProcessBinaryLayout *out);
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static bool ShouldIncreaseThreadResourceLimit();
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static void CpuOn(u64 core_id, uintptr_t entrypoint, uintptr_t arg);
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static size_t GetApplicationPoolSize();
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static size_t GetAppletPoolSize();
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static size_t GetMinimumNonSecureSystemPoolSize();
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static u8 GetDebugLogUartPort();
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/* Randomness. */
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static void GenerateRandom(u64 *dst, size_t count);
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static u64 GenerateRandomRange(u64 min, u64 max);
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};
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public:
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/* Initialization. */
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static NOINLINE void InitializePhase1(bool skip_target_system = false);
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static NOINLINE void InitializePhase2();
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static NOINLINE u32 GetCreateProcessMemoryPool();
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/* Randomness. */
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static void GenerateRandom(u64 *dst, size_t count);
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static u64 GenerateRandomRange(u64 min, u64 max);
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static u64 GenerateRandomU64();
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/* Register access Access. */
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static Result ReadWriteRegister(u32 *out, ams::svc::PhysicalAddress address, u32 mask, u32 value);
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static void ReadWriteRegisterPrivileged(u32 *out, ams::svc::PhysicalAddress address, u32 mask, u32 value);
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static u32 ReadRegisterPrivileged(ams::svc::PhysicalAddress address);
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static void WriteRegisterPrivileged(ams::svc::PhysicalAddress address, u32 value);
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/* Power management. */
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static void SleepSystem();
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static NORETURN void StopSystem(void *arg = nullptr);
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/* User access. */
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#if defined(ATMOSPHERE_ARCH_ARM64)
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static void CallSecureMonitorFromUser(ams::svc::lp64::SecureMonitorArguments *args);
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#endif
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/* Secure Memory. */
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static size_t CalculateRequiredSecureMemorySize(size_t size, u32 pool);
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static Result AllocateSecureMemory(KVirtualAddress *out, size_t size, u32 pool);
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static void FreeSecureMemory(KVirtualAddress address, size_t size, u32 pool);
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protected:
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template<typename F>
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static ALWAYS_INLINE 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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/* User access. */
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#if defined(ATMOSPHERE_ARCH_ARM64)
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static void CallSecureMonitorFromUserImpl(ams::svc::lp64::SecureMonitorArguments *args);
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#endif
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};
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} |