payloads/coreinfo/ramdump_module.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include "coreinfo.h"
   4
   5 #if CONFIG(MODULE_RAMDUMP)
   6
   7 static s64 cursor = 0;
   8 static s64 cursor_max = (1 * 1024 * 1024 * 1024); /* Max. 1 GB RAM for now. */
   9
  10 static int ramdump_module_init(void)
  11 {
  12         return 0;
  13 }
  14
  15 static void dump_ram(WINDOW *win, uint32_t addr, int row, int col)
  16 {
  17         int i, x = 0, y = 0, count = 0;
  18         volatile uint8_t *ptr = (void *)(addr);
  19
  20         mvwprintw(win, 0, col + 54, "RAM address: 0x%08x", addr);
  21
  22         /* Dump 256 bytes of RAM. */
  23         for (i = 1; i < 257; i++) {
  24                 if (x == 0) {
  25                         mvwprintw(win, row + y, col - 1, "%08x", addr + 16 * y);
  26                         mvwaddch(win, row + y, col + 59, '|');
  27                         mvwaddch(win, row + y, col + 76, '|');
  28                 }
  29                 mvwprintw(win, row + y, col + x + 9, "%02x", ptr[i - 1]);
  30                 mvwprintw(win, row + y, 62 + count++, "%c",
  31                           isprint(ptr[i - 1]) ? ptr[i - 1] : ' ');
  32                 x += 3;
  33                 if (x == 24)    /* One more space after column/byte 8. */
  34                         x++;
  35                 if (i % 16 == 0) {
  36                         y++;    /* Start a newline after 16 bytes. */
  37                         x = count = 0;
  38                 }
  39         }
  40 }
  41
  42 static int ramdump_module_redraw(WINDOW *win)
  43 {
  44         print_module_title(win, "RAM Dump");
  45         dump_ram(win, cursor * 256, 2, 2);
  46
  47         return 0;
  48 }
  49
  50 static int ramdump_module_handle(int key)
  51 {
  52         switch (key) {
  53         case KEY_DOWN:
  54                 cursor++;
  55                 break;
  56         case KEY_UP:
  57                 cursor--;
  58                 break;
  59         case KEY_RIGHT:
  60                 cursor += 256;
  61                 break;
  62         case KEY_LEFT:
  63                 cursor -= 256;
  64                 break;
  65         case KEY_PPAGE:
  66                 cursor += 4096; /* Jump in 1MB steps. */
  67                 break;
  68         case KEY_NPAGE:
  69                 cursor -= 4096; /* Jump in 1MB steps. */
  70                 break;
  71         }
  72
  73         if (cursor > cursor_max)
  74                 cursor = cursor_max;
  75
  76         if (cursor < 0)
  77                 cursor = 0;
  78
  79         return 1;
  80 }
  81
  82 struct coreinfo_module ramdump_module = {
  83         .name = "RAM Dump",
  84         .init = ramdump_module_init,
  85         .redraw = ramdump_module_redraw,
  86         .handle = ramdump_module_handle,
  87 };
  88
  89 #else
  90
  91 struct coreinfo_module ramdump_module = {
  92 };
  93
  94 #endif