diff options
| -rw-r--r-- | src/video_core/memory_manager.cpp | 53 | ||||
| -rw-r--r-- | src/video_core/memory_manager.h | 6 |
2 files changed, 25 insertions, 34 deletions
diff --git a/src/video_core/memory_manager.cpp b/src/video_core/memory_manager.cpp index 2789a4ca1..2e1edee03 100644 --- a/src/video_core/memory_manager.cpp +++ b/src/video_core/memory_manager.cpp @@ -2,6 +2,7 @@ // Licensed under GPLv2 or any later version // Refer to the license.txt file included. +#include "common/alignment.h" #include "common/assert.h" #include "video_core/memory_manager.h" @@ -11,7 +12,8 @@ PAddr MemoryManager::AllocateSpace(u64 size, u64 align) { boost::optional<PAddr> paddr = FindFreeBlock(size, align); ASSERT(paddr); - for (u64 offset = 0; offset < size; offset += Memory::PAGE_SIZE) { + for (u64 offset = 0; offset < size; offset += PAGE_SIZE) { + ASSERT(PageSlot(*paddr + offset) == static_cast<u64>(PageStatus::Unmapped)); PageSlot(*paddr + offset) = static_cast<u64>(PageStatus::Allocated); } @@ -19,13 +21,8 @@ PAddr MemoryManager::AllocateSpace(u64 size, u64 align) { } PAddr MemoryManager::AllocateSpace(PAddr paddr, u64 size, u64 align) { - for (u64 offset = 0; offset < size; offset += Memory::PAGE_SIZE) { - if (IsPageMapped(paddr + offset)) { - return AllocateSpace(size, align); - } - } - - for (u64 offset = 0; offset < size; offset += Memory::PAGE_SIZE) { + for (u64 offset = 0; offset < size; offset += PAGE_SIZE) { + ASSERT(PageSlot(paddr + offset) == static_cast<u64>(PageStatus::Unmapped)); PageSlot(paddr + offset) = static_cast<u64>(PageStatus::Allocated); } @@ -33,12 +30,11 @@ PAddr MemoryManager::AllocateSpace(PAddr paddr, u64 size, u64 align) { } PAddr MemoryManager::MapBufferEx(VAddr vaddr, u64 size) { - vaddr &= ~Memory::PAGE_MASK; - - boost::optional<PAddr> paddr = FindFreeBlock(size); + boost::optional<PAddr> paddr = FindFreeBlock(size, PAGE_SIZE); ASSERT(paddr); - for (u64 offset = 0; offset < size; offset += Memory::PAGE_SIZE) { + for (u64 offset = 0; offset < size; offset += PAGE_SIZE) { + ASSERT(PageSlot(*paddr + offset) == static_cast<u64>(PageStatus::Unmapped)); PageSlot(*paddr + offset) = vaddr + offset; } @@ -46,16 +42,10 @@ PAddr MemoryManager::MapBufferEx(VAddr vaddr, u64 size) { } PAddr MemoryManager::MapBufferEx(VAddr vaddr, PAddr paddr, u64 size) { - vaddr &= ~Memory::PAGE_MASK; - paddr &= ~Memory::PAGE_MASK; + ASSERT((paddr & PAGE_MASK) == 0); - for (u64 offset = 0; offset < size; offset += Memory::PAGE_SIZE) { - if (PageSlot(paddr + offset) != static_cast<u64>(PageStatus::Allocated)) { - return MapBufferEx(vaddr, size); - } - } - - for (u64 offset = 0; offset < size; offset += Memory::PAGE_SIZE) { + for (u64 offset = 0; offset < size; offset += PAGE_SIZE) { + ASSERT(PageSlot(paddr + offset) == static_cast<u64>(PageStatus::Allocated)); PageSlot(paddr + offset) = vaddr + offset; } @@ -63,23 +53,20 @@ PAddr MemoryManager::MapBufferEx(VAddr vaddr, PAddr paddr, u64 size) { } boost::optional<PAddr> MemoryManager::FindFreeBlock(u64 size, u64 align) { - PAddr paddr{}; - u64 free_space{}; - align = (align + Memory::PAGE_MASK) & ~Memory::PAGE_MASK; + PAddr paddr = 0; + u64 free_space = 0; + align = (align + PAGE_MASK) & ~PAGE_MASK; while (paddr + free_space < MAX_ADDRESS) { if (!IsPageMapped(paddr + free_space)) { - free_space += Memory::PAGE_SIZE; + free_space += PAGE_SIZE; if (free_space >= size) { return paddr; } } else { - paddr += free_space + Memory::PAGE_SIZE; + paddr += free_space + PAGE_SIZE; free_space = 0; - const u64 remainder{paddr % align}; - if (!remainder) { - paddr = (paddr - remainder) + align; - } + paddr = Common::AlignUp(paddr, align); } } @@ -89,7 +76,7 @@ boost::optional<PAddr> MemoryManager::FindFreeBlock(u64 size, u64 align) { VAddr MemoryManager::PhysicalToVirtualAddress(PAddr paddr) { VAddr base_addr = PageSlot(paddr); ASSERT(base_addr != static_cast<u64>(PageStatus::Unmapped)); - return base_addr + (paddr & Memory::PAGE_MASK); + return base_addr + (paddr & PAGE_MASK); } bool MemoryManager::IsPageMapped(PAddr paddr) { @@ -97,14 +84,14 @@ bool MemoryManager::IsPageMapped(PAddr paddr) { } VAddr& MemoryManager::PageSlot(PAddr paddr) { - auto& block = page_table[(paddr >> (Memory::PAGE_BITS + PAGE_TABLE_BITS)) & PAGE_TABLE_MASK]; + auto& block = page_table[(paddr >> (PAGE_BITS + PAGE_TABLE_BITS)) & PAGE_TABLE_MASK]; if (!block) { block = std::make_unique<PageBlock>(); for (unsigned index = 0; index < PAGE_BLOCK_SIZE; index++) { (*block)[index] = static_cast<u64>(PageStatus::Unmapped); } } - return (*block)[(paddr >> Memory::PAGE_BITS) & PAGE_BLOCK_MASK]; + return (*block)[(paddr >> PAGE_BITS) & PAGE_BLOCK_MASK]; } } // namespace Tegra diff --git a/src/video_core/memory_manager.h b/src/video_core/memory_manager.h index 47da7acd6..b73e283f8 100644 --- a/src/video_core/memory_manager.h +++ b/src/video_core/memory_manager.h @@ -24,6 +24,10 @@ public: PAddr MapBufferEx(VAddr vaddr, PAddr paddr, u64 size); VAddr PhysicalToVirtualAddress(PAddr paddr); + static constexpr u64 PAGE_BITS = 16; + static constexpr u64 PAGE_SIZE = 1 << PAGE_BITS; + static constexpr u64 PAGE_MASK = PAGE_SIZE - 1; + private: boost::optional<PAddr> FindFreeBlock(u64 size, u64 align = 1); bool IsPageMapped(PAddr paddr); @@ -35,7 +39,7 @@ private: }; static constexpr u64 MAX_ADDRESS{0x10000000000ULL}; - static constexpr u64 PAGE_TABLE_BITS{14}; + static constexpr u64 PAGE_TABLE_BITS{10}; static constexpr u64 PAGE_TABLE_SIZE{1 << PAGE_TABLE_BITS}; static constexpr u64 PAGE_TABLE_MASK{PAGE_TABLE_SIZE - 1}; static constexpr u64 PAGE_BLOCK_BITS{14}; |