payloads/coreinfo/nvram_module.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include "coreinfo.h"
   4
   5 #if CONFIG(MODULE_NVRAM)
   6
   7 /**
   8  * Dump 256 bytes of NVRAM.
   9  */
  10 static void dump_nvram(WINDOW *win, int row, int col)
  11 {
  12         int i, x = 0, y = 0;
  13
  14         /* Print vertical and horizontal index numbers. */
  15         for (i = 0; i < 16; i++) {
  16                 mvwprintw(win, ((i < 8) ? 4 : 5) + i, 1, "%2.2X ", i * 0x10);
  17                 mvwprintw(win, 2, 4 + (i * 3), "%2.2X ", i);
  18         }
  19
  20         /* Print vertical and horizontal line. */
  21         for (i = 0; i < 18; i++)
  22                 mvwaddch(win, 3 + i, 3, ACS_VLINE);
  23         for (i = 0; i < 48; i++)
  24                 mvwaddch(win, 3, 3 + i, (i == 0) ? ACS_ULCORNER : ACS_HLINE);
  25
  26         /* Dump NVRAM contents. */
  27         for (i = 1; i < 257; i++) {
  28                 mvwprintw(win, row + y, col + x, "%02x ", nvram_read(i - 1));
  29                 x += 3;
  30                 if (i % 16 == 0) {
  31                         y++;    /* Start a newline after 16 bytes. */
  32                         x = 0;
  33                 }
  34                 if (i % 128 == 0) {
  35                         y++;    /* Add an empty line after 128 bytes. */
  36                         x = 0;
  37                 }
  38         }
  39 }
  40
  41 static int nvram_module_redraw(WINDOW *win)
  42 {
  43         print_module_title(win, "NVRAM Dump");
  44         dump_nvram(win, 4, 4);
  45         return 0;
  46 }
  47
  48 static int nvram_module_init(void)
  49 {
  50         return 0;
  51 }
  52
  53 struct coreinfo_module nvram_module = {
  54         .name = "NVRAM",
  55         .init = nvram_module_init,
  56         .redraw = nvram_module_redraw,
  57 };
  58
  59 #else
  60
  61 struct coreinfo_module nvram_module = {
  62 };
  63
  64 #endif