68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
// Copyright 2022 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include "common/scope_exit.h"
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#include "core/core.h"
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#include "core/hle/kernel/k_memory_block.h"
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#include "core/hle/kernel/k_page_buffer.h"
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#include "core/hle/kernel/k_page_table.h"
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#include "core/hle/kernel/k_process.h"
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#include "core/hle/kernel/k_thread_local_page.h"
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#include "core/hle/kernel/kernel.h"
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namespace Kernel {
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ResultCode KThreadLocalPage::Initialize(KernelCore& kernel, KProcess* process) {
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// Set that this process owns us.
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m_owner = process;
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m_kernel = &kernel;
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// Allocate a new page.
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KPageBuffer* page_buf = KPageBuffer::Allocate(kernel);
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R_UNLESS(page_buf != nullptr, ResultOutOfMemory);
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auto page_buf_guard = SCOPE_GUARD({ KPageBuffer::Free(kernel, page_buf); });
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// Map the address in.
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const auto phys_addr = kernel.System().DeviceMemory().GetPhysicalAddr(page_buf);
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R_TRY(m_owner->PageTable().MapPages(std::addressof(m_virt_addr), 1, PageSize, phys_addr,
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KMemoryState::ThreadLocal,
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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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ResultCode KThreadLocalPage::Finalize() {
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// Get the physical address of the page.
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const PAddr phys_addr = m_owner->PageTable().GetPhysicalAddr(m_virt_addr);
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ASSERT(phys_addr);
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// Unmap the page.
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R_TRY(m_owner->PageTable().UnmapPages(this->GetAddress(), 1, KMemoryState::ThreadLocal));
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// Free the page.
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KPageBuffer::Free(*m_kernel, KPageBuffer::FromPhysicalAddress(m_kernel->System(), phys_addr));
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return ResultSuccess;
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}
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VAddr KThreadLocalPage::Reserve() {
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for (size_t i = 0; i < m_is_region_free.size(); i++) {
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if (m_is_region_free[i]) {
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m_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 0;
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}
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void KThreadLocalPage::Release(VAddr addr) {
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m_is_region_free[this->GetRegionIndex(addr)] = true;
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}
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} // namespace Kernel
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