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// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <array>
#include "common/assert.h"
#include "common/literals.h"
#include "core/hle/kernel/k_address_space_info.h"
namespace Kernel {
namespace {
using namespace Common::Literals;
constexpr u64 Size_Invalid = UINT64_MAX;
// clang-format off
constexpr std::array<KAddressSpaceInfo, 13> AddressSpaceInfos{{
{ .bit_width = 32, .address = 2_MiB , .size = 1_GiB - 2_MiB , .type = KAddressSpaceInfo::Type::MapSmall, },
{ .bit_width = 32, .address = 1_GiB , .size = 4_GiB - 1_GiB , .type = KAddressSpaceInfo::Type::MapLarge, },
{ .bit_width = 32, .address = Size_Invalid, .size = 1_GiB , .type = KAddressSpaceInfo::Type::Alias, },
{ .bit_width = 32, .address = Size_Invalid, .size = 1_GiB , .type = KAddressSpaceInfo::Type::Heap, },
{ .bit_width = 36, .address = 128_MiB , .size = 2_GiB - 128_MiB, .type = KAddressSpaceInfo::Type::MapSmall, },
{ .bit_width = 36, .address = 2_GiB , .size = 64_GiB - 2_GiB , .type = KAddressSpaceInfo::Type::MapLarge, },
{ .bit_width = 36, .address = Size_Invalid, .size = 6_GiB , .type = KAddressSpaceInfo::Type::Heap, },
{ .bit_width = 36, .address = Size_Invalid, .size = 6_GiB , .type = KAddressSpaceInfo::Type::Alias, },
{ .bit_width = 39, .address = 128_MiB , .size = 512_GiB - 128_MiB, .type = KAddressSpaceInfo::Type::Map39Bit, },
{ .bit_width = 39, .address = Size_Invalid, .size = 64_GiB , .type = KAddressSpaceInfo::Type::MapSmall },
{ .bit_width = 39, .address = Size_Invalid, .size = 6_GiB , .type = KAddressSpaceInfo::Type::Heap, },
{ .bit_width = 39, .address = Size_Invalid, .size = 64_GiB , .type = KAddressSpaceInfo::Type::Alias, },
{ .bit_width = 39, .address = Size_Invalid, .size = 2_GiB , .type = KAddressSpaceInfo::Type::Stack, },
}};
// clang-format on
constexpr bool IsAllowedIndexForAddress(std::size_t index) {
return index < AddressSpaceInfos.size() && AddressSpaceInfos[index].address != Size_Invalid;
}
using IndexArray =
std::array<std::size_t, static_cast<std::size_t>(KAddressSpaceInfo::Type::Count)>;
constexpr IndexArray AddressSpaceIndices32Bit{
0, 1, 0, 2, 0, 3,
};
constexpr IndexArray AddressSpaceIndices36Bit{
4, 5, 4, 6, 4, 7,
};
constexpr IndexArray AddressSpaceIndices39Bit{
9, 8, 8, 10, 12, 11,
};
constexpr bool IsAllowed32BitType(KAddressSpaceInfo::Type type) {
return type < KAddressSpaceInfo::Type::Count && type != KAddressSpaceInfo::Type::Map39Bit &&
type != KAddressSpaceInfo::Type::Stack;
}
constexpr bool IsAllowed36BitType(KAddressSpaceInfo::Type type) {
return type < KAddressSpaceInfo::Type::Count && type != KAddressSpaceInfo::Type::Map39Bit &&
type != KAddressSpaceInfo::Type::Stack;
}
constexpr bool IsAllowed39BitType(KAddressSpaceInfo::Type type) {
return type < KAddressSpaceInfo::Type::Count && type != KAddressSpaceInfo::Type::MapLarge;
}
} // namespace
u64 KAddressSpaceInfo::GetAddressSpaceStart(std::size_t width, Type type) {
const std::size_t index{static_cast<std::size_t>(type)};
switch (width) {
case 32:
ASSERT(IsAllowed32BitType(type));
ASSERT(IsAllowedIndexForAddress(AddressSpaceIndices32Bit[index]));
return AddressSpaceInfos[AddressSpaceIndices32Bit[index]].address;
case 36:
ASSERT(IsAllowed36BitType(type));
ASSERT(IsAllowedIndexForAddress(AddressSpaceIndices36Bit[index]));
return AddressSpaceInfos[AddressSpaceIndices36Bit[index]].address;
case 39:
ASSERT(IsAllowed39BitType(type));
ASSERT(IsAllowedIndexForAddress(AddressSpaceIndices39Bit[index]));
return AddressSpaceInfos[AddressSpaceIndices39Bit[index]].address;
}
ASSERT(false);
return 0;
}
std::size_t KAddressSpaceInfo::GetAddressSpaceSize(std::size_t width, Type type) {
const std::size_t index{static_cast<std::size_t>(type)};
switch (width) {
case 32:
ASSERT(IsAllowed32BitType(type));
return AddressSpaceInfos[AddressSpaceIndices32Bit[index]].size;
case 36:
ASSERT(IsAllowed36BitType(type));
return AddressSpaceInfos[AddressSpaceIndices36Bit[index]].size;
case 39:
ASSERT(IsAllowed39BitType(type));
return AddressSpaceInfos[AddressSpaceIndices39Bit[index]].size;
}
ASSERT(false);
return 0;
}
} // namespace Kernel
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