git.sur5r.net Git - u-boot/blob - lib/efi_selftest/efi_selftest_console.c

   1 /*
   2  * EFI efi_selftest
   3  *
   4  * Copyright (c) 2017 Heinrich Schuchardt <xypron.glpk@gmx.de>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <efi_selftest.h>
  10 #include <vsprintf.h>
  11
  12 struct efi_simple_text_output_protocol *con_out;
  13 struct efi_simple_input_interface *con_in;
  14
  15 /*
  16  * Print a MAC address to an u16 string
  17  *
  18  * @pointer: mac address
  19  * @buf: pointer to buffer address
  20  * on return position of terminating zero word
  21  */
  22 static void mac(void *pointer, u16 **buf)
  23 {
  24         int i, j;
  25         u16 c;
  26         u8 *p = (u8 *)pointer;
  27         u8 byte;
  28         u16 *pos = *buf;
  29
  30         for (i = 0; i < ARP_HLEN; ++i) {
  31                 if (i)
  32                         *pos++ = ':';
  33                 byte = p[i];
  34                 for (j = 4; j >= 0; j -= 4) {
  35                         c = (byte >> j) & 0x0f;
  36                         c += '0';
  37                         if (c > '9')
  38                                 c += 'a' - '9' - 1;
  39                         *pos++ = c;
  40                 }
  41         }
  42         *pos = 0;
  43         *buf = pos;
  44 }
  45
  46 /*
  47  * Print a pointer to an u16 string
  48  *
  49  * @pointer: pointer
  50  * @buf: pointer to buffer address
  51  * on return position of terminating zero word
  52  */
  53 static void pointer(void *pointer, u16 **buf)
  54 {
  55         int i;
  56         u16 c;
  57         uintptr_t p = (uintptr_t)pointer;
  58         u16 *pos = *buf;
  59
  60         for (i = 8 * sizeof(p) - 4; i >= 0; i -= 4) {
  61                 c = (p >> i) & 0x0f;
  62                 c += '0';
  63                 if (c > '9')
  64                         c += 'a' - '9' - 1;
  65                 *pos++ = c;
  66         }
  67         *pos = 0;
  68         *buf = pos;
  69 }
  70
  71 /*
  72  * Print an unsigned 32bit value as decimal number to an u16 string
  73  *
  74  * @value: value to be printed
  75  * @buf: pointer to buffer address
  76  * on return position of terminating zero word
  77  */
  78 static void uint2dec(u32 value, u16 **buf)
  79 {
  80         u16 *pos = *buf;
  81         int i;
  82         u16 c;
  83         u64 f;
  84
  85         /*
  86          * Increment by .5 and multiply with
  87          * (2 << 60) / 1,000,000,000 = 0x44B82FA0.9B5A52CC
  88          * to move the first digit to bit 60-63.
  89          */
  90         f = 0x225C17D0;
  91         f += (0x9B5A52DULL * value) >> 28;
  92         f += 0x44B82FA0ULL * value;
  93
  94         for (i = 0; i < 10; ++i) {
  95                 /* Write current digit */
  96                 c = f >> 60;
  97                 if (c || pos != *buf)
  98                         *pos++ = c + '0';
  99                 /* Eliminate current digit */
 100                 f &= 0xfffffffffffffff;
 101                 /* Get next digit */
 102                 f *= 0xaULL;
 103         }
 104         if (pos == *buf)
 105                 *pos++ = '0';
 106         *pos = 0;
 107         *buf = pos;
 108 }
 109
 110 /*
 111  * Print a signed 32bit value as decimal number to an u16 string
 112  *
 113  * @value: value to be printed
 114  * @buf: pointer to buffer address
 115  * on return position of terminating zero word
 116  */
 117 static void int2dec(s32 value, u16 **buf)
 118 {
 119         u32 u;
 120         u16 *pos = *buf;
 121
 122         if (value < 0) {
 123                 *pos++ = '-';
 124                 u = -value;
 125         } else {
 126                 u = value;
 127         }
 128         uint2dec(u, &pos);
 129         *buf = pos;
 130 }
 131
 132 /*
 133  * Print a colored formatted string to the EFI console
 134  *
 135  * @color       color, see constants in efi_api.h, use -1 for no color
 136  * @fmt         format string
 137  * @...         optional arguments
 138  */
 139 void efi_st_printc(int color, const char *fmt, ...)
 140 {
 141         va_list args;
 142         u16 buf[160];
 143         const char *c;
 144         u16 *pos = buf;
 145         const char *s;
 146         u16 *u;
 147
 148         va_start(args, fmt);
 149
 150         if (color >= 0)
 151                 con_out->set_attribute(con_out, (unsigned long)color);
 152         c = fmt;
 153         for (; *c; ++c) {
 154                 switch (*c) {
 155                 case '\\':
 156                         ++c;
 157                         switch (*c) {
 158                         case '\0':
 159                                 --c;
 160                                 break;
 161                         case 'n':
 162                                 *pos++ = '\n';
 163                                 break;
 164                         case 'r':
 165                                 *pos++ = '\r';
 166                                 break;
 167                         case 't':
 168                                 *pos++ = '\t';
 169                                 break;
 170                         default:
 171                                 *pos++ = *c;
 172                         }
 173                         break;
 174                 case '%':
 175                         ++c;
 176                         switch (*c) {
 177                         case '\0':
 178                                 --c;
 179                                 break;
 180                         case 'd':
 181                                 int2dec(va_arg(args, s32), &pos);
 182                                 break;
 183                         case 'p':
 184                                 ++c;
 185                                 switch (*c) {
 186                                 /* MAC address */
 187                                 case 'm':
 188                                         mac(va_arg(args, void*), &pos);
 189                                         break;
 190
 191                                 /* u16 string */
 192                                 case 's':
 193                                         u = va_arg(args, u16*);
 194                                         if (pos > buf) {
 195                                                 *pos = 0;
 196                                                 con_out->output_string(con_out,
 197                                                                        buf);
 198                                         }
 199                                         con_out->output_string(con_out, u);
 200                                         pos = buf;
 201                                         break;
 202                                 default:
 203                                         --c;
 204                                         pointer(va_arg(args, void*), &pos);
 205                                 }
 206                                 break;
 207                         case 's':
 208                                 s = va_arg(args, const char *);
 209                                 for (; *s; ++s)
 210                                         *pos++ = *s;
 211                                 break;
 212                         case 'u':
 213                                 uint2dec(va_arg(args, u32), &pos);
 214                                 break;
 215                         default:
 216                                 break;
 217                         }
 218                         break;
 219                 default:
 220                         *pos++ = *c;
 221                 }
 222         }
 223         va_end(args);
 224         *pos = 0;
 225         con_out->output_string(con_out, buf);
 226         if (color >= 0)
 227                 con_out->set_attribute(con_out, EFI_LIGHTGRAY);
 228 }
 229
 230 /*
 231  * Reads an Unicode character from the input device.
 232  *
 233  * @return: Unicode character
 234  */
 235 u16 efi_st_get_key(void)
 236 {
 237         struct efi_input_key input_key;
 238         efi_status_t ret;
 239
 240         /* Wait for next key */
 241         do {
 242                 ret = con_in->read_key_stroke(con_in, &input_key);
 243         } while (ret == EFI_NOT_READY);
 244         return input_key.unicode_char;
 245 }