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// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <random>
#include "common/common_sizes.h"
#include "core/hle/kernel/board/nintendo/nx/k_system_control.h"
#include "core/hle/kernel/board/nintendo/nx/secure_monitor.h"
#include "core/hle/kernel/k_trace.h"
namespace Kernel::Board::Nintendo::Nx {
namespace impl {
constexpr inline const std::size_t RequiredNonSecureSystemMemorySizeVi = 0x2238 * 4 * 1024;
constexpr inline const std::size_t RequiredNonSecureSystemMemorySizeNvservices = 0x710 * 4 * 1024;
constexpr inline const std::size_t RequiredNonSecureSystemMemorySizeMisc = 0x80 * 4 * 1024;
} // namespace impl
constexpr inline const std::size_t RequiredNonSecureSystemMemorySize =
impl::RequiredNonSecureSystemMemorySizeVi + impl::RequiredNonSecureSystemMemorySizeNvservices +
impl::RequiredNonSecureSystemMemorySizeMisc;
namespace {
u32 GetMemoryModeForInit() {
return 0x01;
}
u32 GetMemorySizeForInit() {
return 0;
}
Smc::MemoryArrangement GetMemoryArrangeForInit() {
switch (GetMemoryModeForInit() & 0x3F) {
case 0x01:
default:
return Smc::MemoryArrangement_4GB;
case 0x02:
return Smc::MemoryArrangement_4GBForAppletDev;
case 0x03:
return Smc::MemoryArrangement_4GBForSystemDev;
case 0x11:
return Smc::MemoryArrangement_6GB;
case 0x12:
return Smc::MemoryArrangement_6GBForAppletDev;
case 0x21:
return Smc::MemoryArrangement_8GB;
}
}
} // namespace
// Initialization.
size_t KSystemControl::Init::GetIntendedMemorySize() {
switch (GetMemorySizeForInit()) {
case Smc::MemorySize_4GB:
default: // All invalid modes should go to 4GB.
return Size_4_GB;
case Smc::MemorySize_6GB:
return Size_6_GB;
case Smc::MemorySize_8GB:
return Size_8_GB;
}
}
PAddr KSystemControl::Init::GetKernelPhysicalBaseAddress(u64 base_address) {
return base_address;
}
bool KSystemControl::Init::ShouldIncreaseThreadResourceLimit() {
return true;
}
std::size_t KSystemControl::Init::GetApplicationPoolSize() {
// Get the base pool size.
const size_t base_pool_size = []() -> size_t {
switch (GetMemoryArrangeForInit()) {
case Smc::MemoryArrangement_4GB:
default:
return Size_3285_MB;
case Smc::MemoryArrangement_4GBForAppletDev:
return Size_2048_MB;
case Smc::MemoryArrangement_4GBForSystemDev:
return Size_3285_MB;
case Smc::MemoryArrangement_6GB:
return Size_4916_MB;
case Smc::MemoryArrangement_6GBForAppletDev:
return Size_3285_MB;
case Smc::MemoryArrangement_8GB:
return Size_4916_MB;
}
}();
// Return (possibly) adjusted size.
return base_pool_size;
}
size_t KSystemControl::Init::GetAppletPoolSize() {
// Get the base pool size.
const size_t base_pool_size = []() -> size_t {
switch (GetMemoryArrangeForInit()) {
case Smc::MemoryArrangement_4GB:
default:
return Size_507_MB;
case Smc::MemoryArrangement_4GBForAppletDev:
return Size_1554_MB;
case Smc::MemoryArrangement_4GBForSystemDev:
return Size_448_MB;
case Smc::MemoryArrangement_6GB:
return Size_562_MB;
case Smc::MemoryArrangement_6GBForAppletDev:
return Size_2193_MB;
case Smc::MemoryArrangement_8GB:
return Size_2193_MB;
}
}();
// Return (possibly) adjusted size.
constexpr size_t ExtraSystemMemoryForAtmosphere = Size_33_MB;
return base_pool_size - ExtraSystemMemoryForAtmosphere - KTraceBufferSize;
}
size_t KSystemControl::Init::GetMinimumNonSecureSystemPoolSize() {
// Verify that our minimum is at least as large as Nintendo's.
constexpr size_t MinimumSize = RequiredNonSecureSystemMemorySize;
static_assert(MinimumSize >= 0x29C8000);
return MinimumSize;
}
namespace {
template <typename F>
u64 GenerateUniformRange(u64 min, u64 max, F f) {
// Handle the case where the difference is too large to represent.
if (max == std::numeric_limits<u64>::max() && min == std::numeric_limits<u64>::min()) {
return f();
}
// Iterate until we get a value in range.
const u64 range_size = ((max + 1) - min);
const u64 effective_max = (std::numeric_limits<u64>::max() / range_size) * range_size;
while (true) {
if (const u64 rnd = f(); rnd < effective_max) {
return min + (rnd % range_size);
}
}
}
} // Anonymous namespace
u64 KSystemControl::GenerateRandomU64() {
static std::random_device device;
static std::mt19937 gen(device());
static std::uniform_int_distribution<u64> distribution(1, std::numeric_limits<u64>::max());
return distribution(gen);
}
u64 KSystemControl::GenerateRandomRange(u64 min, u64 max) {
return GenerateUniformRange(min, max, GenerateRandomU64);
}
} // namespace Kernel::Board::Nintendo::Nx
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