From 91819726b1517d24fe02ba24edaadc9ec974fd1d Mon Sep 17 00:00:00 2001 From: bunnei Date: Fri, 11 Mar 2022 00:36:33 -0800 Subject: core: hle: kernel: k_page_buffer: Add KThreadLocalPage primitive. --- src/core/CMakeLists.txt | 2 + src/core/hle/kernel/k_thread_local_page.cpp | 65 ++++++++++++++++ src/core/hle/kernel/k_thread_local_page.h | 112 ++++++++++++++++++++++++++++ 3 files changed, 179 insertions(+) create mode 100644 src/core/hle/kernel/k_thread_local_page.cpp create mode 100644 src/core/hle/kernel/k_thread_local_page.h (limited to 'src/core') diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt index 43be5e652..6a83d5ceb 100644 --- a/src/core/CMakeLists.txt +++ b/src/core/CMakeLists.txt @@ -245,6 +245,8 @@ add_library(core STATIC hle/kernel/k_system_control.h hle/kernel/k_thread.cpp hle/kernel/k_thread.h + hle/kernel/k_thread_local_page.cpp + hle/kernel/k_thread_local_page.h hle/kernel/k_thread_queue.cpp hle/kernel/k_thread_queue.h hle/kernel/k_trace.h 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 +#include + +#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, + public KSlabAllocated { +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 + requires(std::same_as || + std::same_as) 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 m_is_region_free{}; +}; + +} // namespace Kernel -- cgit v1.2.3