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authorbunnei <bunneidev@gmail.com>2022-03-11 09:36:33 +0100
committerbunnei <bunneidev@gmail.com>2022-03-15 02:14:53 +0100
commit91819726b1517d24fe02ba24edaadc9ec974fd1d (patch)
treea176f075030116f59e361cb2d47f5656b7a38fee /src/core/hle/kernel
parentcore: hle: kernel: k_page_buffer: Add KPageBuffer primitive. (diff)
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Diffstat (limited to 'src/core/hle/kernel')
-rw-r--r--src/core/hle/kernel/k_thread_local_page.cpp65
-rw-r--r--src/core/hle/kernel/k_thread_local_page.h112
2 files changed, 177 insertions, 0 deletions
diff --git a/src/core/hle/kernel/k_thread_local_page.cpp b/src/core/hle/kernel/k_thread_local_page.cpp
new file mode 100644
index 000000000..4653c29f6
--- /dev/null
+++ b/src/core/hle/kernel/k_thread_local_page.cpp
@@ -0,0 +1,65 @@
+// Copyright 2022 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/scope_exit.h"
+#include "core/hle/kernel/k_memory_block.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 {
+
+ResultCode KThreadLocalPage::Initialize(KernelCore& kernel, KProcess* process) {
+ // Set that this process owns us.
+ m_owner = process;
+ m_kernel = &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->PageTable().MapPages(std::addressof(m_virt_addr), 1, PageSize, phys_addr,
+ KMemoryState::ThreadLocal,
+ KMemoryPermission::UserReadWrite));
+
+ // We succeeded.
+ page_buf_guard.Cancel();
+
+ return ResultSuccess;
+}
+
+ResultCode KThreadLocalPage::Finalize() {
+ // Get the physical address of the page.
+ const PAddr phys_addr = m_owner->PageTable().GetPhysicalAddr(m_virt_addr);
+ ASSERT(phys_addr);
+
+ // Unmap the page.
+ R_TRY(m_owner->PageTable().UnmapPages(this->GetAddress(), 1, KMemoryState::ThreadLocal));
+
+ // Free the page.
+ KPageBuffer::Free(*m_kernel, KPageBuffer::FromPhysicalAddress(m_kernel->System(), phys_addr));
+
+ return ResultSuccess;
+}
+
+VAddr 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(VAddr addr) {
+ m_is_region_free[this->GetRegionIndex(addr)] = true;
+}
+
+} // namespace Kernel
diff --git a/src/core/hle/kernel/k_thread_local_page.h b/src/core/hle/kernel/k_thread_local_page.h
new file mode 100644
index 000000000..658c67e94
--- /dev/null
+++ b/src/core/hle/kernel/k_thread_local_page.h
@@ -0,0 +1,112 @@
+// Copyright 2022 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <algorithm>
+#include <array>
+
+#include "common/alignment.h"
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "common/intrusive_red_black_tree.h"
+#include "core/hle/kernel/k_page_buffer.h"
+#include "core/hle/kernel/memory_types.h"
+#include "core/hle/kernel/slab_helpers.h"
+#include "core/hle/result.h"
+
+namespace Kernel {
+
+class KernelCore;
+class KProcess;
+
+class KThreadLocalPage final : public Common::IntrusiveRedBlackTreeBaseNode<KThreadLocalPage>,
+ public KSlabAllocated<KThreadLocalPage> {
+public:
+ static constexpr size_t RegionsPerPage = PageSize / Svc::ThreadLocalRegionSize;
+ static_assert(RegionsPerPage > 0);
+
+public:
+ constexpr explicit KThreadLocalPage(VAddr addr = {}) : m_virt_addr(addr) {
+ m_is_region_free.fill(true);
+ }
+
+ constexpr VAddr GetAddress() const {
+ return m_virt_addr;
+ }
+
+ ResultCode Initialize(KernelCore& kernel, KProcess* process);
+ ResultCode Finalize();
+
+ VAddr Reserve();
+ void Release(VAddr addr);
+
+ bool IsAllUsed() const {
+ return std::ranges::all_of(m_is_region_free.begin(), m_is_region_free.end(),
+ [](bool is_free) { return !is_free; });
+ }
+
+ bool IsAllFree() const {
+ return std::ranges::all_of(m_is_region_free.begin(), m_is_region_free.end(),
+ [](bool is_free) { return is_free; });
+ }
+
+ bool IsAnyUsed() const {
+ return !this->IsAllFree();
+ }
+
+ bool IsAnyFree() const {
+ return !this->IsAllUsed();
+ }
+
+public:
+ using RedBlackKeyType = VAddr;
+
+ static constexpr RedBlackKeyType GetRedBlackKey(const RedBlackKeyType& v) {
+ return v;
+ }
+ static constexpr RedBlackKeyType GetRedBlackKey(const KThreadLocalPage& v) {
+ return v.GetAddress();
+ }
+
+ template <typename T>
+ requires(std::same_as<T, KThreadLocalPage> ||
+ std::same_as<T, RedBlackKeyType>) static constexpr int Compare(const T& lhs,
+ const KThreadLocalPage&
+ rhs) {
+ const VAddr lval = GetRedBlackKey(lhs);
+ const VAddr rval = GetRedBlackKey(rhs);
+
+ if (lval < rval) {
+ return -1;
+ } else if (lval == rval) {
+ return 0;
+ } else {
+ return 1;
+ }
+ }
+
+private:
+ constexpr VAddr GetRegionAddress(size_t i) const {
+ return this->GetAddress() + i * Svc::ThreadLocalRegionSize;
+ }
+
+ constexpr bool Contains(VAddr addr) const {
+ return this->GetAddress() <= addr && addr < this->GetAddress() + PageSize;
+ }
+
+ constexpr size_t GetRegionIndex(VAddr addr) const {
+ ASSERT(Common::IsAligned(addr, Svc::ThreadLocalRegionSize));
+ ASSERT(this->Contains(addr));
+ return (addr - this->GetAddress()) / Svc::ThreadLocalRegionSize;
+ }
+
+private:
+ VAddr m_virt_addr{};
+ KProcess* m_owner{};
+ KernelCore* m_kernel{};
+ std::array<bool, RegionsPerPage> m_is_region_free{};
+};
+
+} // namespace Kernel