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// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "common/scope_exit.h"
#include "core/core.h"
#include "core/hle/kernel/k_memory_block.h"
#include "core/hle/kernel/k_page_buffer.h"
#include "core/hle/kernel/k_page_table.h"
#include "core/hle/kernel/k_process.h"
#include "core/hle/kernel/k_thread_local_page.h"
#include "core/hle/kernel/kernel.h"
namespace Kernel {
Result KThreadLocalPage::Initialize(KernelCore& kernel, KProcess* process) {
// Set that this process owns us.
m_owner = process;
m_kernel = std::addressof(kernel);
// Allocate a new page.
KPageBuffer* page_buf = KPageBuffer::Allocate(kernel);
R_UNLESS(page_buf != nullptr, ResultOutOfMemory);
auto page_buf_guard = SCOPE_GUARD {
KPageBuffer::Free(kernel, page_buf);
};
// Map the address in.
const auto phys_addr = kernel.System().DeviceMemory().GetPhysicalAddr(page_buf);
R_TRY(m_owner->GetPageTable().MapPages(std::addressof(m_virt_addr), 1, PageSize, phys_addr,
KMemoryState::ThreadLocal,
KMemoryPermission::UserReadWrite));
// We succeeded.
page_buf_guard.Cancel();
return ResultSuccess;
}
Result KThreadLocalPage::Finalize() {
// Get the physical address of the page.
KPhysicalAddress phys_addr{};
ASSERT(m_owner->GetPageTable().GetPhysicalAddress(std::addressof(phys_addr), m_virt_addr));
// Unmap the page.
R_TRY(m_owner->GetPageTable().UnmapPages(this->GetAddress(), 1, KMemoryState::ThreadLocal));
// Free the page.
KPageBuffer::Free(*m_kernel, KPageBuffer::FromPhysicalAddress(m_kernel->System(), phys_addr));
return ResultSuccess;
}
KProcessAddress KThreadLocalPage::Reserve() {
for (size_t i = 0; i < m_is_region_free.size(); i++) {
if (m_is_region_free[i]) {
m_is_region_free[i] = false;
return this->GetRegionAddress(i);
}
}
return 0;
}
void KThreadLocalPage::Release(KProcessAddress addr) {
m_is_region_free[this->GetRegionIndex(addr)] = true;
}
} // namespace Kernel
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