mirror of
https://github.com/Atmosphere-NX/Atmosphere
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103 lines
5.3 KiB
C++
103 lines
5.3 KiB
C++
/*
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* Copyright (c) 2018-2020 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 {
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namespace {
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constexpr uintptr_t Invalid = std::numeric_limits<uintptr_t>::max();
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constexpr KAddressSpaceInfo AddressSpaceInfos[] = {
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{ .bit_width = 32, .address = 2_MB, .size = 1_GB - 2_MB, .type = KAddressSpaceInfo::Type_MapSmall, },
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{ .bit_width = 32, .address = 1_GB, .size = 4_GB - 1_GB, .type = KAddressSpaceInfo::Type_MapLarge, },
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{ .bit_width = 32, .address = Invalid, .size = 1_GB, .type = KAddressSpaceInfo::Type_Heap, },
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{ .bit_width = 32, .address = Invalid, .size = 1_GB, .type = KAddressSpaceInfo::Type_Alias, },
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{ .bit_width = 36, .address = 128_MB, .size = 2_GB - 128_MB, .type = KAddressSpaceInfo::Type_MapSmall, },
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{ .bit_width = 36, .address = 2_GB, .size = 64_GB - 2_GB, .type = KAddressSpaceInfo::Type_MapLarge, },
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{ .bit_width = 36, .address = Invalid, .size = 6_GB, .type = KAddressSpaceInfo::Type_Heap, },
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{ .bit_width = 36, .address = Invalid, .size = 6_GB, .type = KAddressSpaceInfo::Type_Alias, },
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{ .bit_width = 39, .address = 128_MB, .size = 512_GB - 128_MB, .type = KAddressSpaceInfo::Type_Map39Bit, },
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{ .bit_width = 39, .address = Invalid, .size = 64_GB, .type = KAddressSpaceInfo::Type_MapSmall, },
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{ .bit_width = 39, .address = Invalid, .size = 6_GB, .type = KAddressSpaceInfo::Type_Heap, },
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{ .bit_width = 39, .address = Invalid, .size = 64_GB, .type = KAddressSpaceInfo::Type_Alias, },
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{ .bit_width = 39, .address = Invalid, .size = 2_GB, .type = KAddressSpaceInfo::Type_Stack, },
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};
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constexpr bool IsAllowedIndexForAddress(size_t index) {
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return index < util::size(AddressSpaceInfos) && AddressSpaceInfos[index].GetAddress() != Invalid;
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}
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constexpr size_t AddressSpaceIndices32Bit[KAddressSpaceInfo::Type_Count] = {
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0, 1, 0, 2, 0, 3,
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};
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constexpr size_t AddressSpaceIndices36Bit[KAddressSpaceInfo::Type_Count] = {
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4, 5, 4, 6, 4, 7,
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};
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constexpr size_t AddressSpaceIndices39Bit[KAddressSpaceInfo::Type_Count] = {
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9, 8, 8, 10, 12, 11,
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};
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constexpr bool IsAllowed32BitType(KAddressSpaceInfo::Type type) {
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return type < KAddressSpaceInfo::Type_Count && type != KAddressSpaceInfo::Type_Map39Bit && type != KAddressSpaceInfo::Type_Stack;
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}
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constexpr bool IsAllowed36BitType(KAddressSpaceInfo::Type type) {
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return type < KAddressSpaceInfo::Type_Count && type != KAddressSpaceInfo::Type_Map39Bit && type != KAddressSpaceInfo::Type_Stack;
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}
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constexpr bool IsAllowed39BitType(KAddressSpaceInfo::Type type) {
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return type < KAddressSpaceInfo::Type_Count && type != KAddressSpaceInfo::Type_MapLarge;
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}
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}
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uintptr_t KAddressSpaceInfo::GetAddressSpaceStart(size_t width, KAddressSpaceInfo::Type type) {
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switch (width) {
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case 32:
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MESOSPHERE_ABORT_UNLESS(IsAllowed32BitType(type));
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MESOSPHERE_ABORT_UNLESS(IsAllowedIndexForAddress(AddressSpaceIndices32Bit[type]));
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return AddressSpaceInfos[AddressSpaceIndices32Bit[type]].GetAddress();
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case 36:
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MESOSPHERE_ABORT_UNLESS(IsAllowed36BitType(type));
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MESOSPHERE_ABORT_UNLESS(IsAllowedIndexForAddress(AddressSpaceIndices36Bit[type]));
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return AddressSpaceInfos[AddressSpaceIndices36Bit[type]].GetAddress();
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case 39:
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MESOSPHERE_ABORT_UNLESS(IsAllowed39BitType(type));
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MESOSPHERE_ABORT_UNLESS(IsAllowedIndexForAddress(AddressSpaceIndices39Bit[type]));
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return AddressSpaceInfos[AddressSpaceIndices39Bit[type]].GetAddress();
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MESOSPHERE_UNREACHABLE_DEFAULT_CASE();
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}
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}
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size_t KAddressSpaceInfo::GetAddressSpaceSize(size_t width, KAddressSpaceInfo::Type type) {
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switch (width) {
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case 32:
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MESOSPHERE_ABORT_UNLESS(IsAllowed32BitType(type));
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return AddressSpaceInfos[AddressSpaceIndices32Bit[type]].GetSize();
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case 36:
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MESOSPHERE_ABORT_UNLESS(IsAllowed36BitType(type));
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return AddressSpaceInfos[AddressSpaceIndices36Bit[type]].GetSize();
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case 39:
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MESOSPHERE_ABORT_UNLESS(IsAllowed39BitType(type));
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return AddressSpaceInfos[AddressSpaceIndices39Bit[type]].GetSize();
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MESOSPHERE_UNREACHABLE_DEFAULT_CASE();
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}
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}
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}
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