c1e168fdbe
+ Microarchitecture optimizations + 64-bit support + Xilinx FPGA support + LLVM-16 support + Refactoring and quality control fixes minor update minor update minor update minor update minor update minor update cleanup cleanup cache bindings and memory perf refactory minor update minor update hw unit tests fixes minor update minor update minor update minor update minor update minor udpate minor update minor update minor update minor update minor update minor update minor update minor updates minor updates minor update minor update minor update minor update minor update minor update minor updates minor updates minor updates minor updates minor update minor update
138 lines
4.0 KiB
C++
138 lines
4.0 KiB
C++
// Copyright © 2019-2023
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "shared_mem.h"
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#include "core.h"
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#include <bitmanip.h>
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#include <vector>
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#include "types.h"
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using namespace vortex;
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class SharedMem::Impl {
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protected:
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SharedMem* simobject_;
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Config config_;
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RAM ram_;
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uint32_t bank_sel_addr_start_;
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uint32_t bank_sel_addr_end_;
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PerfStats perf_stats_;
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uint64_t to_local_addr(uint64_t addr) {
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uint32_t total_lines = config_.capacity / config_.line_size;
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uint32_t line_bits = log2ceil(total_lines);
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uint32_t offset = bit_getw(addr, 0, line_bits-1);
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return offset;
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}
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public:
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Impl(SharedMem* simobject, const Config& config)
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: simobject_(simobject)
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, config_(config)
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, ram_(config.capacity, config.capacity)
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, bank_sel_addr_start_(0)
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, bank_sel_addr_end_(0 + log2ceil(config.num_banks)-1)
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{}
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virtual ~Impl() {}
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void reset() {
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perf_stats_ = PerfStats();
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}
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void read(void* data, uint64_t addr, uint32_t size) {
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auto s_addr = to_local_addr(addr);
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DPH(3, "Shared Mem addr=0x" << std::hex << s_addr << std::endl);
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ram_.read(data, s_addr, size);
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}
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void write(const void* data, uint64_t addr, uint32_t size) {
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auto s_addr = to_local_addr(addr);
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DPH(3, "Shared Mem addr=0x" << std::hex << s_addr << std::endl);
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ram_.write(data, s_addr, size);
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}
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void tick() {
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std::vector<bool> in_used_banks(config_.num_banks);
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for (uint32_t req_id = 0; req_id < config_.num_reqs; ++req_id) {
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auto& core_req_port = simobject_->Inputs.at(req_id);
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if (core_req_port.empty())
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continue;
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auto& core_req = core_req_port.front();
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uint32_t bank_id = 0;
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if (bank_sel_addr_start_ <= bank_sel_addr_end_) {
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bank_id = (uint32_t)bit_getw(core_req.addr, bank_sel_addr_start_, bank_sel_addr_end_);
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}
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// bank conflict check
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if (in_used_banks.at(bank_id)) {
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++perf_stats_.bank_stalls;
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continue;
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}
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in_used_banks.at(bank_id) = true;
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if (!core_req.write || config_.write_reponse) {
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// send response
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MemRsp core_rsp{core_req.tag, core_req.cid};
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simobject_->Outputs.at(req_id).send(core_rsp, 1);
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}
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// update perf counters
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perf_stats_.reads += !core_req.write;
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perf_stats_.writes += core_req.write;
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// remove input
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core_req_port.pop();
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}
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}
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const PerfStats& perf_stats() const {
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return perf_stats_;
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}
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};
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///////////////////////////////////////////////////////////////////////////////
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SharedMem::SharedMem(const SimContext& ctx, const char* name, const Config& config)
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: SimObject<SharedMem>(ctx, name)
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, Inputs(config.num_reqs, this)
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, Outputs(config.num_reqs, this)
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, impl_(new Impl(this, config))
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{}
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SharedMem::~SharedMem() {
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delete impl_;
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}
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void SharedMem::reset() {
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impl_->reset();
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}
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void SharedMem::read(void* data, uint64_t addr, uint32_t size) {
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impl_->read(data, addr, size);
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}
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void SharedMem::write(const void* data, uint64_t addr, uint32_t size) {
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impl_->write(data, addr, size);
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}
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void SharedMem::tick() {
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impl_->tick();
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}
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const SharedMem::PerfStats& SharedMem::perf_stats() const {
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return impl_->perf_stats();
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} |