mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-23 18:56:03 +00:00
81 lines
2.8 KiB
C++
81 lines
2.8 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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Result KThreadLocalPage::Initialize(KProcess *process) {
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MESOSPHERE_ASSERT_THIS();
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/* Set that this process owns us. */
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this->owner = process;
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/* Allocate a new page. */
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KPageBuffer *page_buf = KPageBuffer::Allocate();
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R_UNLESS(page_buf != nullptr, svc::ResultOutOfMemory());
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auto page_buf_guard = SCOPE_GUARD { KPageBuffer::Free(page_buf); };
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/* Map the address in. */
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R_TRY(this->owner->GetPageTable().MapPages(std::addressof(this->virt_addr), 1, PageSize, page_buf->GetPhysicalAddress(), KMemoryState_ThreadLocal, KMemoryPermission_UserReadWrite));
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/* We succeeded. */
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page_buf_guard.Cancel();
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return ResultSuccess();
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}
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Result KThreadLocalPage::Finalize() {
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MESOSPHERE_ASSERT_THIS();
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/* Get the physical address of the page. */
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KPhysicalAddress phys_addr = Null<KPhysicalAddress>;
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MESOSPHERE_ABORT_UNLESS(this->owner->GetPageTable().GetPhysicalAddress(&phys_addr, this->GetAddress()));
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/* Unmap the page. */
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R_TRY(this->owner->GetPageTable().UnmapPages(this->GetAddress(), 1, KMemoryState_ThreadLocal));
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/* Free the page. */
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KPageBuffer::Free(KPageBuffer::FromPhysicalAddress(phys_addr));
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return ResultSuccess();
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}
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KProcessAddress KThreadLocalPage::Reserve() {
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MESOSPHERE_ASSERT_THIS();
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for (size_t i = 0; i < util::size(this->is_region_free); i++) {
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if (this->is_region_free[i]) {
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this->is_region_free[i] = false;
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return this->GetRegionAddress(i);
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}
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}
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return Null<KProcessAddress>;
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}
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void KThreadLocalPage::Release(KProcessAddress addr) {
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MESOSPHERE_ASSERT_THIS();
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this->is_region_free[this->GetRegionIndex(addr)] = true;
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}
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void *KThreadLocalPage::GetPointer() const {
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MESOSPHERE_ASSERT_THIS();
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KPhysicalAddress phys_addr;
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MESOSPHERE_ABORT_UNLESS(this->owner->GetPageTable().GetPhysicalAddress(std::addressof(phys_addr), this->GetAddress()));
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return static_cast<void *>(KPageBuffer::FromPhysicalAddress(phys_addr));
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}
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}
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