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