mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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300 lines
11 KiB
C++
300 lines
11 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 <exosphere.hpp>
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#include "secmon_cache.hpp"
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#include "secmon_setup.hpp"
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#include "secmon_spinlock.hpp"
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#include "secmon_map.hpp"
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#include "smc/secmon_smc_info.hpp"
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namespace ams::secmon {
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namespace {
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constexpr inline const uintptr_t BootCodeAddress = MemoryRegionVirtualTzramBootCode.GetAddress();
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constexpr inline const size_t BootCodeSize = MemoryRegionVirtualTzramBootCode.GetSize();
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constinit uintptr_t g_smc_user_page_physical_address = 0;
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constinit uintptr_t g_ams_iram_page_physical_address = 0;
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constinit uintptr_t g_ams_user_page_physical_address = 0;
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constinit SpinLockType g_ams_iram_page_spin_lock = {};
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constinit SpinLockType g_ams_user_page_spin_lock = {};
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using namespace ams::mmu;
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constexpr inline PageTableMappingAttribute MappingAttributesEl3NonSecureRwData = AddMappingAttributeIndex(PageTableMappingAttributes_El3NonSecureRwData, MemoryAttributeIndexNormal);
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constexpr inline PageTableMappingAttribute MappingAttributesEl3NonSecureDevice = AddMappingAttributeIndex(PageTableMappingAttributes_El3NonSecureRwData, MemoryAttributeIndexDevice);
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constexpr void UnmapBootCodeImpl(u64 *l1, u64 *l2, u64 *l3, uintptr_t boot_code, size_t boot_code_size) {
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/* Unmap the L3 entries corresponding to the boot code. */
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AMS_UNUSED(l1, l2);
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InvalidateL3Entries(l3, boot_code, boot_code_size);
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}
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constexpr void UnmapTzramImpl(u64 *l1, u64 *l2, u64 *l3) {
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/* Unmap the L3 entries corresponding to tzram. */
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InvalidateL3Entries(l3, MemoryRegionPhysicalTzram.GetAddress(), MemoryRegionPhysicalTzram.GetSize());
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/* Unmap the L2 entries corresponding to those L3 entries. */
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InvalidateL2Entries(l2, MemoryRegionPhysicalTzramL2.GetAddress(), MemoryRegionPhysicalTzramL2.GetSize());
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/* Unmap the L1 entry corresponding to to those L2 entries. */
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InvalidateL1Entries(l1, MemoryRegionPhysical.GetAddress(), MemoryRegionPhysical.GetSize());
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}
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constexpr void MapSmcUserPageImpl(u64 *l3, uintptr_t address) {
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/* Set the L3 entry. */
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SetL3BlockEntry(l3, MemoryRegionVirtualSmcUserPage.GetAddress(), address, MemoryRegionVirtualSmcUserPage.GetSize(), MappingAttributesEl3NonSecureRwData);
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}
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constexpr void UnmapSmcUserPageImpl(u64 *l3) {
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/* Unmap the L3 entry. */
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InvalidateL3Entries(l3, MemoryRegionVirtualSmcUserPage.GetAddress(), MemoryRegionVirtualSmcUserPage.GetSize());
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}
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constexpr void MapAtmosphereIramPageImpl(u64 *l3, uintptr_t address) {
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/* Set the L3 entry. */
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SetL3BlockEntry(l3, MemoryRegionVirtualAtmosphereIramPage.GetAddress(), address, MemoryRegionVirtualAtmosphereIramPage.GetSize(), MappingAttributesEl3NonSecureDevice);
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}
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constexpr void UnmapAtmosphereIramPageImpl(u64 *l3) {
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/* Unmap the L3 entry. */
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InvalidateL3Entries(l3, MemoryRegionVirtualAtmosphereIramPage.GetAddress(), MemoryRegionVirtualAtmosphereIramPage.GetSize());
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}
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constexpr void MapAtmosphereUserPageImpl(u64 *l3, uintptr_t address) {
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/* Set the L3 entry. */
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SetL3BlockEntry(l3, MemoryRegionVirtualAtmosphereUserPage.GetAddress(), address, MemoryRegionVirtualAtmosphereUserPage.GetSize(), MappingAttributesEl3NonSecureRwData);
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}
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constexpr void UnmapAtmosphereUserPageImpl(u64 *l3) {
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/* Unmap the L3 entry. */
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InvalidateL3Entries(l3, MemoryRegionVirtualAtmosphereUserPage.GetAddress(), MemoryRegionVirtualAtmosphereUserPage.GetSize());
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}
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void ClearLow(uintptr_t address, size_t size) {
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/* Clear the low part. */
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util::ClearMemory(reinterpret_cast<void *>(address), size / 2);
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}
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void ClearHigh(uintptr_t address, size_t size) {
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/* Clear the high part. */
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util::ClearMemory(reinterpret_cast<void *>(address + size / 2), size / 2);
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}
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bool IsPhysicalMemoryAddress(uintptr_t address) {
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return (address - MemoryRegionDram.GetAddress()) < GetPhysicalMemorySize();
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}
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}
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void ClearBootCodeHigh() {
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ClearHigh(BootCodeAddress, BootCodeSize);
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}
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void UnmapBootCode() {
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/* Get the tables. */
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u64 * const l1 = MemoryRegionVirtualTzramL1PageTable.GetPointer<u64>();
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u64 * const l2_l3 = MemoryRegionVirtualTzramL2L3PageTable.GetPointer<u64>();
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/* Clear the low boot code region; high was already cleared by a previous call. */
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ClearLow(BootCodeAddress, BootCodeSize);
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/* Unmap. */
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UnmapBootCodeImpl(l1, l2_l3, l2_l3, BootCodeAddress, BootCodeSize);
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/* Ensure the mappings are consistent. */
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secmon::EnsureMappingConsistency();
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}
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size_t GetPhysicalMemorySize() {
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switch (smc::GetPhysicalMemorySize()) {
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case pkg1::MemorySize_4GB: return 4_GB;
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case pkg1::MemorySize_6GB: return 6_GB;
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case pkg1::MemorySize_8GB: return 8_GB;
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AMS_UNREACHABLE_DEFAULT_CASE();
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}
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}
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void UnmapTzram() {
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/* Get the tables. */
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u64 * const l1 = MemoryRegionVirtualTzramL1PageTable.GetPointer<u64>();
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u64 * const l2_l3 = MemoryRegionVirtualTzramL2L3PageTable.GetPointer<u64>();
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/* Unmap. */
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UnmapTzramImpl(l1, l2_l3, l2_l3);
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/* Ensure the mappings are consistent. */
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secmon::EnsureMappingConsistency();
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}
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uintptr_t MapSmcUserPage(uintptr_t address) {
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if (g_smc_user_page_physical_address == 0) {
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if (!IsPhysicalMemoryAddress(address)) {
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return 0;
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}
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if (!util::IsAligned(address, 4_KB)) {
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return 0;
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}
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g_smc_user_page_physical_address = address;
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u64 * const l2_l3 = MemoryRegionVirtualTzramL2L3PageTable.GetPointer<u64>();
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MapSmcUserPageImpl(l2_l3, address);
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/* Ensure the mappings are consistent. */
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secmon::EnsureMappingConsistency(MemoryRegionVirtualSmcUserPage.GetAddress());
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} else {
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AMS_ABORT_UNLESS(address == g_smc_user_page_physical_address);
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}
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return MemoryRegionVirtualSmcUserPage.GetAddress();
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}
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void UnmapSmcUserPage() {
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if (g_smc_user_page_physical_address == 0) {
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return;
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}
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/* Ensure that the page is no longer in cache. */
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hw::FlushDataCache(MemoryRegionVirtualSmcUserPage.GetPointer<void>(), MemoryRegionVirtualSmcUserPage.GetSize());
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hw::DataSynchronizationBarrierInnerShareable();
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u64 * const l2_l3 = MemoryRegionVirtualTzramL2L3PageTable.GetPointer<u64>();
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UnmapSmcUserPageImpl(l2_l3);
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/* Ensure the mappings are consistent. */
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secmon::EnsureMappingConsistency(MemoryRegionVirtualSmcUserPage.GetAddress());
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g_smc_user_page_physical_address = 0;
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}
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uintptr_t MapAtmosphereIramPage(uintptr_t address) {
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/* Acquire the ams iram spinlock. */
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AcquireSpinLock(g_ams_iram_page_spin_lock);
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auto lock_guard = SCOPE_GUARD { ReleaseSpinLock(g_ams_iram_page_spin_lock); };
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/* Validate that the page is an IRAM page. */
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if (!MemoryRegionPhysicalIram.Contains(address, 1)) {
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return 0;
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}
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/* Validate that the page is aligned. */
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if (!util::IsAligned(address, 4_KB)) {
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return 0;
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}
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/* Map the page. */
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g_ams_iram_page_physical_address = address;
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u64 * const l2_l3 = MemoryRegionVirtualTzramL2L3PageTable.GetPointer<u64>();
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MapAtmosphereIramPageImpl(l2_l3, address);
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/* Ensure the mappings are consistent. */
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secmon::EnsureMappingConsistency(MemoryRegionVirtualAtmosphereIramPage.GetAddress());
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/* Hold the lock. */
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lock_guard.Cancel();
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return MemoryRegionVirtualAtmosphereIramPage.GetAddress();
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}
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void UnmapAtmosphereIramPage() {
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/* Can't unmap if nothing's unmapped. */
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if (g_ams_iram_page_physical_address == 0) {
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return;
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}
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/* Ensure that the page is no longer in cache. */
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hw::FlushDataCache(MemoryRegionVirtualAtmosphereIramPage.GetPointer<void>(), MemoryRegionVirtualAtmosphereIramPage.GetSize());
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hw::DataSynchronizationBarrierInnerShareable();
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/* Unmap the page. */
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u64 * const l2_l3 = MemoryRegionVirtualTzramL2L3PageTable.GetPointer<u64>();
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UnmapAtmosphereIramPageImpl(l2_l3);
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/* Ensure the mappings are consistent. */
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secmon::EnsureMappingConsistency(MemoryRegionVirtualAtmosphereIramPage.GetAddress());
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/* Release the page. */
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g_ams_iram_page_physical_address = 0;
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ReleaseSpinLock(g_ams_iram_page_spin_lock);
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}
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uintptr_t MapAtmosphereUserPage(uintptr_t address) {
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/* Acquire the ams user spinlock. */
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AcquireSpinLock(g_ams_user_page_spin_lock);
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auto lock_guard = SCOPE_GUARD { ReleaseSpinLock(g_ams_user_page_spin_lock); };
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/* Validate that the page is a dram page. */
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if (!IsPhysicalMemoryAddress(address)) {
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return 0;
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}
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/* Validate that the page is aligned. */
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if (!util::IsAligned(address, 4_KB)) {
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return 0;
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}
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/* Map the page. */
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g_ams_user_page_physical_address = address;
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u64 * const l2_l3 = MemoryRegionVirtualTzramL2L3PageTable.GetPointer<u64>();
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MapAtmosphereUserPageImpl(l2_l3, address);
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/* Ensure the mappings are consistent. */
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secmon::EnsureMappingConsistency(MemoryRegionVirtualAtmosphereUserPage.GetAddress());
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/* Hold the lock. */
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lock_guard.Cancel();
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return MemoryRegionVirtualAtmosphereUserPage.GetAddress();
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}
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void UnmapAtmosphereUserPage() {
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/* Can't unmap if nothing's unmapped. */
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if (g_ams_user_page_physical_address == 0) {
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return;
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}
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/* Ensure that the page is no longer in cache. */
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hw::FlushDataCache(MemoryRegionVirtualAtmosphereUserPage.GetPointer<void>(), MemoryRegionVirtualAtmosphereUserPage.GetSize());
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hw::DataSynchronizationBarrierInnerShareable();
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/* Unmap the page. */
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u64 * const l2_l3 = MemoryRegionVirtualTzramL2L3PageTable.GetPointer<u64>();
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UnmapAtmosphereUserPageImpl(l2_l3);
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/* Ensure the mappings are consistent. */
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secmon::EnsureMappingConsistency(MemoryRegionVirtualAtmosphereUserPage.GetAddress());
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/* Release the page. */
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g_ams_user_page_physical_address = 0;
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ReleaseSpinLock(g_ams_user_page_spin_lock);
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}
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}
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