mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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218 lines
9.4 KiB
C++
218 lines
9.4 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::svc {
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/* ============================= Common ============================= */
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namespace {
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class CacheOperation {
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public:
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virtual void Operate(void *address, size_t size) const = 0;
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};
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Result DoProcessCacheOperation(const CacheOperation &operation, KProcessPageTable &page_table, uintptr_t address, size_t size) {
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/* Determine aligned extents. */
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const uintptr_t aligned_start = util::AlignDown(address, PageSize);
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const uintptr_t aligned_end = util::AlignUp(address + size, PageSize);
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const size_t num_pages = (aligned_end - aligned_start) / PageSize;
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/* Create a page group for the process's memory. */
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KPageGroup pg(page_table.GetBlockInfoManager());
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/* Make and open the page group. */
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R_TRY(page_table.MakeAndOpenPageGroup(std::addressof(pg),
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aligned_start, num_pages,
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KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted,
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KMemoryPermission_UserRead, KMemoryPermission_UserRead,
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KMemoryAttribute_Uncached, KMemoryAttribute_None));
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/* Ensure we don't leak references to the pages we're operating on. */
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ON_SCOPE_EXIT { pg.Close(); };
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/* Operate on all the blocks. */
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uintptr_t cur_address = aligned_start;
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size_t remaining = size;
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for (const auto &block : pg) {
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/* Get the block extents. */
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KVirtualAddress operate_address = block.GetAddress();
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size_t operate_size = block.GetSize();
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/* Adjust to remain within range. */
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if (cur_address < address) {
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operate_address += (address - cur_address);
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}
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if (operate_size > remaining) {
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operate_size = remaining;
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}
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/* Operate. */
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operation.Operate(GetVoidPointer(operate_address), operate_size);
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/* Advance. */
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cur_address += block.GetSize();
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remaining -= operate_size;
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}
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MESOSPHERE_ASSERT(remaining == 0);
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return ResultSuccess();
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}
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void FlushEntireDataCache() {
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/* Flushing cache takes up to 1ms, so determine our minimum end tick. */
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const s64 timeout = KHardwareTimer::GetTick() + ams::svc::Tick(TimeSpan::FromMilliSeconds(1));
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/* Flush the entire data cache. */
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cpu::FlushEntireDataCache();
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/* Wait for 1ms to have passed. */
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while (KHardwareTimer::GetTick() < timeout) {
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cpu::Yield();
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}
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}
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Result FlushDataCache(uintptr_t address, size_t size) {
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/* Succeed if there's nothing to do. */
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R_SUCCEED_IF(size == 0);
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/* Validate that the region is within range. */
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R_UNLESS(GetCurrentProcess().GetPageTable().Contains(address, size), svc::ResultInvalidCurrentMemory());
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/* Flush the cache. */
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R_TRY(cpu::FlushDataCache(reinterpret_cast<void *>(address), size));
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return ResultSuccess();
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}
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Result InvalidateProcessDataCache(ams::svc::Handle process_handle, uint64_t address, uint64_t size) {
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/* Validate address/size. */
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R_UNLESS(size > 0, svc::ResultInvalidSize());
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R_UNLESS(address == static_cast<uintptr_t>(address), svc::ResultInvalidCurrentMemory());
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R_UNLESS(size == static_cast<size_t>(size), svc::ResultInvalidCurrentMemory());
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/* Get the process from its handle. */
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KScopedAutoObject process = GetCurrentProcess().GetHandleTable().GetObject<KProcess>(process_handle);
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R_UNLESS(process.IsNotNull(), svc::ResultInvalidHandle());
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/* Invalidate the cache. */
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R_TRY(process->GetPageTable().InvalidateProcessDataCache(address, size));
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return ResultSuccess();
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}
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Result StoreProcessDataCache(ams::svc::Handle process_handle, uint64_t address, uint64_t size) {
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/* Validate address/size. */
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R_UNLESS(size > 0, svc::ResultInvalidSize());
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R_UNLESS(address == static_cast<uintptr_t>(address), svc::ResultInvalidCurrentMemory());
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R_UNLESS(size == static_cast<size_t>(size), svc::ResultInvalidCurrentMemory());
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/* Get the process from its handle. */
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KScopedAutoObject process = GetCurrentProcess().GetHandleTable().GetObject<KProcess>(process_handle);
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R_UNLESS(process.IsNotNull(), svc::ResultInvalidHandle());
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/* Verify the region is within range. */
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auto &page_table = process->GetPageTable();
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R_UNLESS(page_table.Contains(address, size), svc::ResultInvalidCurrentMemory());
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/* Perform the operation. */
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if (process.GetPointerUnsafe() == GetCurrentProcessPointer()) {
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return cpu::StoreDataCache(reinterpret_cast<void *>(address), size);
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} else {
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class StoreCacheOperation : public CacheOperation {
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public:
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virtual void Operate(void *address, size_t size) const override { cpu::StoreDataCache(address, size); }
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} operation;
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return DoProcessCacheOperation(operation, page_table, address, size);
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}
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}
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Result FlushProcessDataCache(ams::svc::Handle process_handle, uint64_t address, uint64_t size) {
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/* Validate address/size. */
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R_UNLESS(size > 0, svc::ResultInvalidSize());
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R_UNLESS(address == static_cast<uintptr_t>(address), svc::ResultInvalidCurrentMemory());
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R_UNLESS(size == static_cast<size_t>(size), svc::ResultInvalidCurrentMemory());
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/* Get the process from its handle. */
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KScopedAutoObject process = GetCurrentProcess().GetHandleTable().GetObject<KProcess>(process_handle);
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R_UNLESS(process.IsNotNull(), svc::ResultInvalidHandle());
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/* Verify the region is within range. */
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auto &page_table = process->GetPageTable();
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R_UNLESS(page_table.Contains(address, size), svc::ResultInvalidCurrentMemory());
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/* Perform the operation. */
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if (process.GetPointerUnsafe() == GetCurrentProcessPointer()) {
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return cpu::FlushDataCache(reinterpret_cast<void *>(address), size);
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} else {
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class FlushCacheOperation : public CacheOperation {
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public:
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virtual void Operate(void *address, size_t size) const override { cpu::FlushDataCache(address, size); }
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} operation;
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return DoProcessCacheOperation(operation, page_table, address, size);
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}
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}
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}
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/* ============================= 64 ABI ============================= */
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void FlushEntireDataCache64() {
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return FlushEntireDataCache();
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}
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Result FlushDataCache64(ams::svc::Address address, ams::svc::Size size) {
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return FlushDataCache(address, size);
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}
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Result InvalidateProcessDataCache64(ams::svc::Handle process_handle, uint64_t address, uint64_t size) {
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return InvalidateProcessDataCache(process_handle, address, size);
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}
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Result StoreProcessDataCache64(ams::svc::Handle process_handle, uint64_t address, uint64_t size) {
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return StoreProcessDataCache(process_handle, address, size);
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}
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Result FlushProcessDataCache64(ams::svc::Handle process_handle, uint64_t address, uint64_t size) {
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return FlushProcessDataCache(process_handle, address, size);
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}
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/* ============================= 64From32 ABI ============================= */
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void FlushEntireDataCache64From32() {
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return FlushEntireDataCache();
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}
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Result FlushDataCache64From32(ams::svc::Address address, ams::svc::Size size) {
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return FlushDataCache(address, size);
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}
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Result InvalidateProcessDataCache64From32(ams::svc::Handle process_handle, uint64_t address, uint64_t size) {
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return InvalidateProcessDataCache(process_handle, address, size);
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}
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Result StoreProcessDataCache64From32(ams::svc::Handle process_handle, uint64_t address, uint64_t size) {
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return StoreProcessDataCache(process_handle, address, size);
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}
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Result FlushProcessDataCache64From32(ams::svc::Handle process_handle, uint64_t address, uint64_t size) {
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return FlushProcessDataCache(process_handle, address, size);
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}
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}
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