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// SPDX-FileCopyrightText: Copyright 2019 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <atomic>
#include "common/alignment.h"
#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 {
static constexpr u16 IdentityValue = 1;
using namespace Core::Memory;
RasterizerAccelerated::RasterizerAccelerated(Memory& cpu_memory_) : map{}, cpu_memory{cpu_memory_} {
// We are tracking CPU memory, which cannot map more than 39 bits.
const VAddr start_address = 0;
const VAddr end_address = (1ULL << 39);
const IntervalType address_space_interval(start_address, end_address);
const auto value = std::make_pair(address_space_interval, IdentityValue);
map.add(value);
}
RasterizerAccelerated::~RasterizerAccelerated() = default;
void RasterizerAccelerated::UpdatePagesCachedCount(VAddr addr, u64 size, bool cache) {
std::scoped_lock lk{map_lock};
// Align sizes.
addr = Common::AlignDown(addr, YUZU_PAGESIZE);
size = Common::AlignUp(size, YUZU_PAGESIZE);
// Declare the overall interval we are going to operate on.
const VAddr start_address = addr;
const VAddr end_address = addr + size;
const IntervalType modification_range(start_address, end_address);
// Find the boundaries of where to iterate.
const auto lower = map.lower_bound(modification_range);
const auto upper = map.upper_bound(modification_range);
// Iterate over the contained intervals.
for (auto it = lower; it != upper; it++) {
// Intersect interval range with modification range.
const auto current_range = modification_range & it->first;
// Calculate the address and size to operate over.
const auto current_addr = current_range.lower();
const auto current_size = current_range.upper() - current_addr;
// Get the current value of the range.
const auto value = it->second;
if (cache && value == IdentityValue) {
// If we are going to cache, and the value is not yet referenced, then cache this range.
cpu_memory.RasterizerMarkRegionCached(current_addr, current_size, true);
} else if (!cache && value == IdentityValue + 1) {
// If we are going to uncache, and this is the last reference, then uncache this range.
cpu_memory.RasterizerMarkRegionCached(current_addr, current_size, false);
}
}
// Update the set.
const auto value = std::make_pair(modification_range, IdentityValue);
if (cache) {
map.add(value);
} else {
map.subtract(value);
}
}
} // namespace VideoCore
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