/* Copyright 2019-2020 Canaan Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include <runtime/k210/interpreter.h>
#if !NNCASE_TARGET_K210_SIMULATOR
#include <sysctl.h>
#endif

using namespace nncase;
using namespace nncase::runtime;
using namespace nncase::runtime::k210;

interpreter::interpreter()
#if NNCASE_TARGET_K210_SIMULATOR
    : kpu_mem_(std::make_unique<uint8_t[]>(2 * 1024 * 1024))
#endif
{
#if !NNCASE_TARGET_K210_SIMULATOR
    kpu->interrupt_clear.reg = 7;
    kpu->interrupt_mask.reg = 7;
    kpu->fifo_threshold.reg = 10 | (1 << 4);
    kpu->eight_bit_mode.reg = 1;

    plic_set_priority(IRQN_AI_INTERRUPT, 1);
#endif
}

xtl::span<uint8_t> interpreter::memory_at(const memory_range &range) const noexcept
{
    if (range.memory_type == mem_k210_kpu)
    {
        uintptr_t base =
#if NNCASE_TARGET_K210_SIMULATOR
            (uintptr_t)kpu_mem_.get();
#else
            (uintptr_t)AI_IO_BASE_ADDR;
#endif
        return { reinterpret_cast<uint8_t *>(base + range.start), range.size };
    }

    return interpreter_base::memory_at(range);
}

#if !NNCASE_TARGET_K210_SIMULATOR
interpreter::clock_t::time_point interpreter::get_now() const noexcept
{
    auto micro = std::chrono::microseconds(sysctl_get_time_us());
    return clock_t::time_point(std::chrono::duration_cast<clock_t::duration>(micro));
}
#endif