112 lines
3.7 KiB
C++
112 lines
3.7 KiB
C++
/* Copyright 2020 The TensorFlow Authors. All Rights Reserved.
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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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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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==============================================================================*/
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#include "tensorflow/lite/micro/debug_log.h"
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#include <cstdint>
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#include <cstdio>
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#include <cstring>
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// Print to debug console by default. One can define next to extend destinations
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// set: EMSDP_LOG_TO_MEMORY
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// : fill .debug_log memory region (data section) with passed chars.
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// EMSDP_LOG_TO_HOST
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// : Use MetaWare HostLink to print output log. Requires Synopsys MetaWare
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// debugger
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// EMSDP_LOG_TO_UART
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// : use default debug UART (out to FTDI channel 0). The same USB Port is used
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// for JTAG.
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#define EMSDP_LOG_TO_UART
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// Memory size for symbols dump in EMSDP_LOG_TO_MEMORY destination
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#define EMSDP_LOG_TO_MEMORY_SIZE (2 * 1024)
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// EMSDP Debug UART related defines (registers and bits)
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#define EMSDP_DBG_UART_BASE (0xF0004000U)
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#define DW_UART_CPR_FIFO_STAT (1 << 10)
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#define DW_UART_USR_TFNF (0x02)
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#define DW_UART_LSR_TXD_EMPTY (0x20)
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// EMSDP UART registers map (only necessairy fields)
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typedef volatile struct dw_uart_reg {
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uint32_t DATA; /* data in/out and DLL */
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uint32_t RES1[4];
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uint32_t LSR; /* Line Status Register */
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uint32_t RES2[25];
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uint32_t USR; /* UART status register */
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uint32_t RES3[29];
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uint32_t CPR; /* Component parameter register */
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} DW_UART_REG;
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// For simplicity we assume U-boot has already initialized debug console during
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// application loading (or on reset). Hence, we use only status and data
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// registers to organize blocking loop for printing symbols. No input and no IRQ
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// handling. See embarc_osp repository for full EMSDP uart driver.
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// (https://github.com/foss-for-synopsys-dwc-arc-processors/embarc_osp)
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void DbgUartSendStr(const char* s) {
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DW_UART_REG* uart_reg_ptr = (DW_UART_REG*)(EMSDP_DBG_UART_BASE);
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const char* src = s;
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while (*src) {
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// Check uart status to send char
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bool uart_is_ready = false;
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if (uart_reg_ptr->CPR & DW_UART_CPR_FIFO_STAT)
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uart_is_ready = ((uart_reg_ptr->USR & DW_UART_USR_TFNF) != 0);
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else
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uart_is_ready = ((uart_reg_ptr->LSR & DW_UART_LSR_TXD_EMPTY) != 0);
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// Send char if uart is ready.
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if (uart_is_ready) uart_reg_ptr->DATA = *src++;
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}
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}
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// Simple dump of symbols to a pre-allocated memory region.
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// When total log exceeds memory region size, cursor is moved to its begining.
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// The memory region can be viewed afterward with debugger.
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// It can be viewed/read with debugger afterward.
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void LogToMem(const char* s) {
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static int cursor = 0;
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#pragma Bss(".debug_log")
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static volatile char debug_log_mem[EMSDP_LOG_TO_MEMORY_SIZE];
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#pragma Bss()
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const char* src = s;
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while (*src) {
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debug_log_mem[cursor] = *src++;
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cursor = (cursor < EMSDP_LOG_TO_MEMORY_SIZE) ? cursor + 1 : 0;
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}
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debug_log_mem[cursor] = '^';
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}
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extern "C" void DebugLog(const char* s) {
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#ifndef TF_LITE_STRIP_ERROR_STRINGS
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#if defined EMSDP_LOG_TO_UART
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DbgUartSendStr(s);
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#endif
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#if defined EMSDP_LOG_TO_MEMORY
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#warning \
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"EMSDP_LOG_TO_MEMORY is defined. View .debug_log memory region for stdout"
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LogToMem(s);
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#endif
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#if defined EMSDP_LOG_TO_HOST
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#warning "EMSDP_LOG_TO_HOST is defined. Ensure hostlib is linked."
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fprintf(stderr, "%s", s);
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#endif
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#endif // TF_LITE_STRIP_ERROR_STRINGS
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}
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