Summer Qin | 7789423 | 2020-08-28 11:24:15 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2019-2020, Arm Limited. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include <stdarg.h> |
| 9 | #include <stddef.h> |
| 10 | #include <stdint.h> |
| 11 | #include "uart_stdout.h" |
| 12 | |
| 13 | #define PRINT_BUFF_SIZE 32 |
| 14 | #define NUM_BUFF_SIZE 12 |
| 15 | |
| 16 | struct formatted_buffer_t { |
| 17 | size_t pos; |
| 18 | uint8_t buf[PRINT_BUFF_SIZE]; |
| 19 | }; |
| 20 | |
| 21 | const char hex_digits_lo[] = {'0', '1', '2', '3', '4', '5', '6', '7', |
| 22 | '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'}; |
| 23 | const char hex_digits_up[] = {'0', '1', '2', '3', '4', '5', '6', '7', |
| 24 | '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'}; |
| 25 | |
| 26 | static void _tfm_flush_formatted_buffer(struct formatted_buffer_t *pb, |
| 27 | uint8_t data) |
| 28 | { |
| 29 | pb->buf[pb->pos++] = data; |
| 30 | if (pb->pos >= PRINT_BUFF_SIZE) { |
| 31 | pb->pos = 0; |
| 32 | /* uart flush and print here. */ |
| 33 | stdio_output_string(pb->buf, PRINT_BUFF_SIZE); |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | static int _tfm_string_output(struct formatted_buffer_t *pb, |
| 38 | const char *str) |
| 39 | { |
| 40 | int count = 0; |
| 41 | |
| 42 | while (*str) { |
| 43 | _tfm_flush_formatted_buffer(pb, *str++); |
| 44 | count++; |
| 45 | } |
| 46 | |
| 47 | return count; |
| 48 | } |
| 49 | |
| 50 | static int _tfm_dec_num_output(struct formatted_buffer_t *pb, |
| 51 | int32_t num, uint8_t sign) |
| 52 | { |
| 53 | int count = 0; |
| 54 | uint8_t num_buff[NUM_BUFF_SIZE] = {0}; |
| 55 | uint32_t number = (uint32_t)num; |
| 56 | uint32_t k = 0; |
| 57 | |
| 58 | if (sign == 'd' && num < 0) { |
| 59 | _tfm_flush_formatted_buffer(pb, '-'); |
| 60 | count++; |
| 61 | number = -num; |
| 62 | } |
| 63 | |
| 64 | do { |
| 65 | num_buff[k++] = '0' + number % 10; |
| 66 | number /= 10; |
| 67 | } while (number); |
| 68 | |
| 69 | while (k) { |
| 70 | _tfm_flush_formatted_buffer(pb, num_buff[--k]); |
| 71 | count++; |
| 72 | } |
| 73 | |
| 74 | return count; |
| 75 | } |
| 76 | |
| 77 | static int _tfm_hex_num_output(struct formatted_buffer_t *pb, uint32_t num, |
| 78 | const char *hex_digits) |
| 79 | { |
| 80 | int count = 0; |
| 81 | uint8_t num_buff[NUM_BUFF_SIZE] = {0}; |
| 82 | uint32_t k = 0; |
| 83 | |
| 84 | do { |
| 85 | num_buff[k++] = hex_digits[num & 0x0f]; |
| 86 | num >>= 4; |
| 87 | } while (num); |
| 88 | |
| 89 | while (k) { |
| 90 | _tfm_flush_formatted_buffer(pb, num_buff[--k]); |
| 91 | count++; |
| 92 | } |
| 93 | |
| 94 | return count; |
| 95 | } |
| 96 | |
| 97 | static int _tfm_log_vprintf(const char *fmt, va_list ap) |
| 98 | { |
| 99 | int count = 0; |
| 100 | struct formatted_buffer_t outputbuf; |
| 101 | |
| 102 | outputbuf.pos = 0; |
| 103 | |
| 104 | while (*fmt) { |
| 105 | if (*fmt == '%') { |
| 106 | switch (*(++fmt)) { |
| 107 | case 'd': |
| 108 | case 'i': |
| 109 | count += _tfm_dec_num_output(&outputbuf, |
| 110 | va_arg(ap, int32_t), 'd'); |
| 111 | break; |
| 112 | case 'u': |
| 113 | count += _tfm_dec_num_output(&outputbuf, |
| 114 | va_arg(ap, int32_t), 'u'); |
| 115 | break; |
| 116 | case 'x': |
| 117 | count += _tfm_hex_num_output(&outputbuf, va_arg(ap, uint32_t), |
| 118 | hex_digits_lo); |
| 119 | break; |
| 120 | case 'X': |
| 121 | count += _tfm_hex_num_output(&outputbuf, va_arg(ap, uint32_t), |
| 122 | hex_digits_up); |
| 123 | break; |
| 124 | case 'p': |
| 125 | count += _tfm_string_output(&outputbuf, "0x"); |
| 126 | count += _tfm_hex_num_output(&outputbuf, va_arg(ap, uint32_t), |
| 127 | hex_digits_lo); |
| 128 | break; |
| 129 | case 's': |
| 130 | count += _tfm_string_output(&outputbuf, va_arg(ap, char*)); |
| 131 | break; |
| 132 | case 'c': |
| 133 | _tfm_flush_formatted_buffer(&outputbuf, |
| 134 | (uint8_t)va_arg(ap, int32_t)); |
| 135 | count++; |
| 136 | break; |
| 137 | case '%': |
| 138 | _tfm_flush_formatted_buffer(&outputbuf, '%'); |
| 139 | count++; |
| 140 | break; |
| 141 | default: |
| 142 | count += _tfm_string_output(&outputbuf, "[Unsupported Tag]"); |
| 143 | continue; |
| 144 | } |
| 145 | fmt++; |
| 146 | } else { |
| 147 | _tfm_flush_formatted_buffer(&outputbuf, *fmt++); |
| 148 | count++; |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | /* End of printf, flush buf */ |
| 153 | if (outputbuf.pos) { |
| 154 | count += stdio_output_string(outputbuf.buf, outputbuf.pos); |
| 155 | } |
| 156 | |
| 157 | return count; |
| 158 | } |
| 159 | |
| 160 | int tfm_log_printf(const char *fmt, ...) |
| 161 | { |
| 162 | int count = 0; |
| 163 | va_list ap; |
| 164 | |
| 165 | va_start(ap, fmt); |
| 166 | count = _tfm_log_vprintf(fmt, ap); |
| 167 | va_end(ap); |
| 168 | |
| 169 | return count; |
| 170 | } |