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