mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-17 23:12:17 +00:00
299 lines
11 KiB
C++
299 lines
11 KiB
C++
/*
|
|
* Copyright (c) 2018-2020 Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include <exosphere.hpp>
|
|
#include "secmon_cache.hpp"
|
|
#include "secmon_setup.hpp"
|
|
#include "secmon_spinlock.hpp"
|
|
#include "secmon_map.hpp"
|
|
#include "smc/secmon_smc_info.hpp"
|
|
|
|
namespace ams::secmon {
|
|
|
|
namespace {
|
|
|
|
constexpr inline const uintptr_t BootCodeAddress = MemoryRegionVirtualTzramBootCode.GetAddress();
|
|
constexpr inline const size_t BootCodeSize = MemoryRegionVirtualTzramBootCode.GetSize();
|
|
|
|
constinit uintptr_t g_smc_user_page_physical_address = 0;
|
|
constinit uintptr_t g_ams_iram_page_physical_address = 0;
|
|
constinit uintptr_t g_ams_user_page_physical_address = 0;
|
|
|
|
constinit SpinLockType g_ams_iram_page_spin_lock = {};
|
|
constinit SpinLockType g_ams_user_page_spin_lock = {};
|
|
|
|
using namespace ams::mmu;
|
|
|
|
constexpr inline PageTableMappingAttribute MappingAttributesEl3NonSecureRwData = AddMappingAttributeIndex(PageTableMappingAttributes_El3NonSecureRwData, MemoryAttributeIndexNormal);
|
|
constexpr inline PageTableMappingAttribute MappingAttributesEl3NonSecureDevice = AddMappingAttributeIndex(PageTableMappingAttributes_El3NonSecureRwData, MemoryAttributeIndexDevice);
|
|
|
|
constexpr void UnmapBootCodeImpl(u64 *l1, u64 *l2, u64 *l3, uintptr_t boot_code, size_t boot_code_size) {
|
|
/* Unmap the L3 entries corresponding to the boot code. */
|
|
InvalidateL3Entries(l3, boot_code, boot_code_size);
|
|
}
|
|
|
|
constexpr void UnmapTzramImpl(u64 *l1, u64 *l2, u64 *l3) {
|
|
/* Unmap the L3 entries corresponding to tzram. */
|
|
InvalidateL3Entries(l3, MemoryRegionPhysicalTzram.GetAddress(), MemoryRegionPhysicalTzram.GetSize());
|
|
|
|
/* Unmap the L2 entries corresponding to those L3 entries. */
|
|
InvalidateL2Entries(l2, MemoryRegionPhysicalTzramL2.GetAddress(), MemoryRegionPhysicalTzramL2.GetSize());
|
|
|
|
/* Unmap the L1 entry corresponding to to those L2 entries. */
|
|
InvalidateL1Entries(l1, MemoryRegionPhysical.GetAddress(), MemoryRegionPhysical.GetSize());
|
|
}
|
|
|
|
constexpr void MapSmcUserPageImpl(u64 *l3, uintptr_t address) {
|
|
/* Set the L3 entry. */
|
|
SetL3BlockEntry(l3, MemoryRegionVirtualSmcUserPage.GetAddress(), address, MemoryRegionVirtualSmcUserPage.GetSize(), MappingAttributesEl3NonSecureRwData);
|
|
}
|
|
|
|
constexpr void UnmapSmcUserPageImpl(u64 *l3) {
|
|
/* Unmap the L3 entry. */
|
|
InvalidateL3Entries(l3, MemoryRegionVirtualSmcUserPage.GetAddress(), MemoryRegionVirtualSmcUserPage.GetSize());
|
|
}
|
|
|
|
constexpr void MapAtmosphereIramPageImpl(u64 *l3, uintptr_t address) {
|
|
/* Set the L3 entry. */
|
|
SetL3BlockEntry(l3, MemoryRegionVirtualAtmosphereIramPage.GetAddress(), address, MemoryRegionVirtualAtmosphereIramPage.GetSize(), MappingAttributesEl3NonSecureDevice);
|
|
}
|
|
|
|
constexpr void UnmapAtmosphereIramPageImpl(u64 *l3) {
|
|
/* Unmap the L3 entry. */
|
|
InvalidateL3Entries(l3, MemoryRegionVirtualAtmosphereIramPage.GetAddress(), MemoryRegionVirtualAtmosphereIramPage.GetSize());
|
|
}
|
|
|
|
constexpr void MapAtmosphereUserPageImpl(u64 *l3, uintptr_t address) {
|
|
/* Set the L3 entry. */
|
|
SetL3BlockEntry(l3, MemoryRegionVirtualAtmosphereUserPage.GetAddress(), address, MemoryRegionVirtualAtmosphereUserPage.GetSize(), MappingAttributesEl3NonSecureRwData);
|
|
}
|
|
|
|
constexpr void UnmapAtmosphereUserPageImpl(u64 *l3) {
|
|
/* Unmap the L3 entry. */
|
|
InvalidateL3Entries(l3, MemoryRegionVirtualAtmosphereUserPage.GetAddress(), MemoryRegionVirtualAtmosphereUserPage.GetSize());
|
|
}
|
|
|
|
void ClearLow(uintptr_t address, size_t size) {
|
|
/* Clear the low part. */
|
|
util::ClearMemory(reinterpret_cast<void *>(address), size / 2);
|
|
}
|
|
|
|
void ClearHigh(uintptr_t address, size_t size) {
|
|
/* Clear the high part. */
|
|
util::ClearMemory(reinterpret_cast<void *>(address + size / 2), size / 2);
|
|
}
|
|
|
|
bool IsPhysicalMemoryAddress(uintptr_t address) {
|
|
return (address - MemoryRegionDram.GetAddress()) < GetPhysicalMemorySize();
|
|
}
|
|
|
|
}
|
|
|
|
void ClearBootCodeHigh() {
|
|
ClearHigh(BootCodeAddress, BootCodeSize);
|
|
}
|
|
|
|
void UnmapBootCode() {
|
|
/* Get the tables. */
|
|
u64 * const l1 = MemoryRegionVirtualTzramL1PageTable.GetPointer<u64>();
|
|
u64 * const l2_l3 = MemoryRegionVirtualTzramL2L3PageTable.GetPointer<u64>();
|
|
|
|
/* Clear the low boot code region; high was already cleared by a previous call. */
|
|
ClearLow(BootCodeAddress, BootCodeSize);
|
|
|
|
/* Unmap. */
|
|
UnmapBootCodeImpl(l1, l2_l3, l2_l3, BootCodeAddress, BootCodeSize);
|
|
|
|
/* Ensure the mappings are consistent. */
|
|
secmon::EnsureMappingConsistency();
|
|
}
|
|
|
|
size_t GetPhysicalMemorySize() {
|
|
switch (smc::GetPhysicalMemorySize()) {
|
|
case pkg1::MemorySize_4GB: return 4_GB;
|
|
case pkg1::MemorySize_6GB: return 6_GB;
|
|
case pkg1::MemorySize_8GB: return 8_GB;
|
|
AMS_UNREACHABLE_DEFAULT_CASE();
|
|
}
|
|
}
|
|
|
|
void UnmapTzram() {
|
|
/* Get the tables. */
|
|
u64 * const l1 = MemoryRegionVirtualTzramL1PageTable.GetPointer<u64>();
|
|
u64 * const l2_l3 = MemoryRegionVirtualTzramL2L3PageTable.GetPointer<u64>();
|
|
|
|
/* Unmap. */
|
|
UnmapTzramImpl(l1, l2_l3, l2_l3);
|
|
|
|
/* Ensure the mappings are consistent. */
|
|
secmon::EnsureMappingConsistency();
|
|
}
|
|
|
|
uintptr_t MapSmcUserPage(uintptr_t address) {
|
|
if (g_smc_user_page_physical_address == 0) {
|
|
if (!IsPhysicalMemoryAddress(address)) {
|
|
return 0;
|
|
}
|
|
|
|
if (!util::IsAligned(address, 4_KB)) {
|
|
return 0;
|
|
}
|
|
|
|
g_smc_user_page_physical_address = address;
|
|
|
|
u64 * const l2_l3 = MemoryRegionVirtualTzramL2L3PageTable.GetPointer<u64>();
|
|
|
|
MapSmcUserPageImpl(l2_l3, address);
|
|
|
|
/* Ensure the mappings are consistent. */
|
|
secmon::EnsureMappingConsistency(MemoryRegionVirtualSmcUserPage.GetAddress());
|
|
} else {
|
|
AMS_ABORT_UNLESS(address == g_smc_user_page_physical_address);
|
|
}
|
|
|
|
return MemoryRegionVirtualSmcUserPage.GetAddress();
|
|
}
|
|
|
|
void UnmapSmcUserPage() {
|
|
if (g_smc_user_page_physical_address == 0) {
|
|
return;
|
|
}
|
|
|
|
/* Ensure that the page is no longer in cache. */
|
|
hw::FlushDataCache(MemoryRegionVirtualSmcUserPage.GetPointer<void>(), MemoryRegionVirtualSmcUserPage.GetSize());
|
|
hw::DataSynchronizationBarrierInnerShareable();
|
|
|
|
u64 * const l2_l3 = MemoryRegionVirtualTzramL2L3PageTable.GetPointer<u64>();
|
|
|
|
UnmapSmcUserPageImpl(l2_l3);
|
|
|
|
/* Ensure the mappings are consistent. */
|
|
secmon::EnsureMappingConsistency(MemoryRegionVirtualSmcUserPage.GetAddress());
|
|
|
|
g_smc_user_page_physical_address = 0;
|
|
}
|
|
|
|
uintptr_t MapAtmosphereIramPage(uintptr_t address) {
|
|
/* Acquire the ams iram spinlock. */
|
|
AcquireSpinLock(g_ams_iram_page_spin_lock);
|
|
auto lock_guard = SCOPE_GUARD { ReleaseSpinLock(g_ams_iram_page_spin_lock); };
|
|
|
|
/* Validate that the page is an IRAM page. */
|
|
if (!MemoryRegionPhysicalIram.Contains(address, 1)) {
|
|
return 0;
|
|
}
|
|
|
|
/* Validate that the page is aligned. */
|
|
if (!util::IsAligned(address, 4_KB)) {
|
|
return 0;
|
|
}
|
|
|
|
/* Map the page. */
|
|
g_ams_iram_page_physical_address = address;
|
|
|
|
u64 * const l2_l3 = MemoryRegionVirtualTzramL2L3PageTable.GetPointer<u64>();
|
|
|
|
MapAtmosphereIramPageImpl(l2_l3, address);
|
|
|
|
/* Ensure the mappings are consistent. */
|
|
secmon::EnsureMappingConsistency(MemoryRegionVirtualAtmosphereIramPage.GetAddress());
|
|
|
|
/* Hold the lock. */
|
|
lock_guard.Cancel();
|
|
|
|
return MemoryRegionVirtualAtmosphereIramPage.GetAddress();
|
|
}
|
|
|
|
void UnmapAtmosphereIramPage() {
|
|
/* Can't unmap if nothing's unmapped. */
|
|
if (g_ams_iram_page_physical_address == 0) {
|
|
return;
|
|
}
|
|
|
|
/* Ensure that the page is no longer in cache. */
|
|
hw::FlushDataCache(MemoryRegionVirtualAtmosphereIramPage.GetPointer<void>(), MemoryRegionVirtualAtmosphereIramPage.GetSize());
|
|
hw::DataSynchronizationBarrierInnerShareable();
|
|
|
|
/* Unmap the page. */
|
|
u64 * const l2_l3 = MemoryRegionVirtualTzramL2L3PageTable.GetPointer<u64>();
|
|
|
|
UnmapAtmosphereIramPageImpl(l2_l3);
|
|
|
|
/* Ensure the mappings are consistent. */
|
|
secmon::EnsureMappingConsistency(MemoryRegionVirtualAtmosphereIramPage.GetAddress());
|
|
|
|
/* Release the page. */
|
|
g_ams_iram_page_physical_address = 0;
|
|
|
|
ReleaseSpinLock(g_ams_iram_page_spin_lock);
|
|
}
|
|
|
|
uintptr_t MapAtmosphereUserPage(uintptr_t address) {
|
|
/* Acquire the ams user spinlock. */
|
|
AcquireSpinLock(g_ams_user_page_spin_lock);
|
|
auto lock_guard = SCOPE_GUARD { ReleaseSpinLock(g_ams_user_page_spin_lock); };
|
|
|
|
/* Validate that the page is a dram page. */
|
|
if (!IsPhysicalMemoryAddress(address)) {
|
|
return 0;
|
|
}
|
|
|
|
/* Validate that the page is aligned. */
|
|
if (!util::IsAligned(address, 4_KB)) {
|
|
return 0;
|
|
}
|
|
|
|
/* Map the page. */
|
|
g_ams_user_page_physical_address = address;
|
|
|
|
u64 * const l2_l3 = MemoryRegionVirtualTzramL2L3PageTable.GetPointer<u64>();
|
|
|
|
MapAtmosphereUserPageImpl(l2_l3, address);
|
|
|
|
/* Ensure the mappings are consistent. */
|
|
secmon::EnsureMappingConsistency(MemoryRegionVirtualAtmosphereUserPage.GetAddress());
|
|
|
|
/* Hold the lock. */
|
|
lock_guard.Cancel();
|
|
|
|
return MemoryRegionVirtualAtmosphereUserPage.GetAddress();
|
|
}
|
|
|
|
void UnmapAtmosphereUserPage() {
|
|
/* Can't unmap if nothing's unmapped. */
|
|
if (g_ams_user_page_physical_address == 0) {
|
|
return;
|
|
}
|
|
|
|
/* Ensure that the page is no longer in cache. */
|
|
hw::FlushDataCache(MemoryRegionVirtualAtmosphereUserPage.GetPointer<void>(), MemoryRegionVirtualAtmosphereUserPage.GetSize());
|
|
hw::DataSynchronizationBarrierInnerShareable();
|
|
|
|
/* Unmap the page. */
|
|
u64 * const l2_l3 = MemoryRegionVirtualTzramL2L3PageTable.GetPointer<u64>();
|
|
|
|
UnmapAtmosphereUserPageImpl(l2_l3);
|
|
|
|
/* Ensure the mappings are consistent. */
|
|
secmon::EnsureMappingConsistency(MemoryRegionVirtualAtmosphereUserPage.GetAddress());
|
|
|
|
/* Release the page. */
|
|
g_ams_user_page_physical_address = 0;
|
|
|
|
ReleaseSpinLock(g_ams_user_page_spin_lock);
|
|
}
|
|
|
|
}
|