dump.h

// Copyright 2020 ETH Zurich and University of Bologna.
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0
//
// Authors: Samuel Riedel, ETH Zurich <sriedel@iis.ee.ethz.ch>
//          Viviane Potocnik, ETH Zurich <vivianep@iis.ee.ethz.ch>
//          Luca Colagrande, ETH Zurich <colluca@iis.ee.ethz.ch>
 
// Dump a value via CSR
// !!! Careful: This is only supported in simulation and an experimental
// feature. All writes to unimplemented CSR registers will be dumped by Snitch.
// This can be exploited to quickly print measurement values from all cores
// simultaneously without the hassle of printf. To specify multiple metrics,
// different CSRs can be used. The macro will define a function that will then
// always print via the same CSR. E.g., `dump(uint32_t, errors, 8)` will define
// a function with the following signature: `dump_errors(uint32_t val)`, which
// will print the given value via the 8th register. Alternatively, the
// `write_csr(reg, val)` macro can be used directly.
 
#pragma once
 
#define NAMED_DUMP(type, name, reg)                                           \
    static __attribute__((always_inline)) inline void dump_##name(type val) { \
        asm volatile("csrw " #reg ", %0" ::"rK"(val));                        \
    }
 
#define DUMP(val) ({ asm volatile("csrw 0x7C4, %0" ::"rK"(val)); })