// Copyright 2019 yuzu Emulator Project // Licensed under GPLv2 or any later version // Refer to the license.txt file included. #include <atomic> #include "common/assert.h" #include "common/common_types.h" #include "common/div_ceil.h" #include "core/memory.h" #include "video_core/rasterizer_accelerated.h" namespace VideoCore { using namespace Core::Memory; RasterizerAccelerated::RasterizerAccelerated(Memory& cpu_memory_) : cpu_memory{cpu_memory_} {} RasterizerAccelerated::~RasterizerAccelerated() = default; void RasterizerAccelerated::UpdatePagesCachedCount(VAddr addr, u64 size, int delta) { u64 uncache_begin = 0; u64 cache_begin = 0; u64 uncache_bytes = 0; u64 cache_bytes = 0; std::atomic_thread_fence(std::memory_order_acquire); const u64 page_end = Common::DivCeil(addr + size, PAGE_SIZE); for (u64 page = addr >> PAGE_BITS; page != page_end; ++page) { std::atomic_uint16_t& count = cached_pages.at(page >> 2).Count(page); if (delta > 0) { ASSERT_MSG(count.load(std::memory_order::relaxed) < UINT16_MAX, "Count may overflow!"); } else if (delta < 0) { ASSERT_MSG(count.load(std::memory_order::relaxed) > 0, "Count may underflow!"); } else { ASSERT_MSG(false, "Delta must be non-zero!"); } // Adds or subtracts 1, as count is a unsigned 8-bit value count.fetch_add(static_cast<u16>(delta), std::memory_order_release); // Assume delta is either -1 or 1 if (count.load(std::memory_order::relaxed) == 0) { if (uncache_bytes == 0) { uncache_begin = page; } uncache_bytes += PAGE_SIZE; } else if (uncache_bytes > 0) { cpu_memory.RasterizerMarkRegionCached(uncache_begin << PAGE_BITS, uncache_bytes, false); uncache_bytes = 0; } if (count.load(std::memory_order::relaxed) == 1 && delta > 0) { if (cache_bytes == 0) { cache_begin = page; } cache_bytes += PAGE_SIZE; } else if (cache_bytes > 0) { cpu_memory.RasterizerMarkRegionCached(cache_begin << PAGE_BITS, cache_bytes, true); cache_bytes = 0; } } if (uncache_bytes > 0) { cpu_memory.RasterizerMarkRegionCached(uncache_begin << PAGE_BITS, uncache_bytes, false); } if (cache_bytes > 0) { cpu_memory.RasterizerMarkRegionCached(cache_begin << PAGE_BITS, cache_bytes, true); } } } // namespace VideoCore