1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2012 The Chromium OS Authors.
7 * IO space access commands.
12 #include <display_options.h>
15 /* Display values from last command */
16 static ulong last_addr, last_size;
17 static ulong last_length = 0x40;
18 static ulong base_address;
20 #define DISP_LINE_LEN 16
26 * iod{.b, .w, .l} {addr}
28 int do_io_iod(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
30 ulong addr, length, bytes;
31 u8 buf[DISP_LINE_LEN];
35 * We use the last specified parameters, unless new ones are
45 if ((flag & CMD_FLAG_REPEAT) == 0) {
47 * New command specified. Check for a size specification.
48 * Defaults to long if no or incorrect specification.
50 size = cmd_get_data_size(argv[0], 4);
54 /* Address is specified since argc > 1 */
55 addr = hextoul(argv[1], NULL);
59 * If another parameter, it is the length to display.
60 * Length is the number of objects, not number of bytes.
63 length = hextoul(argv[2], NULL);
66 bytes = size * length;
69 for (; bytes > 0; addr += todo) {
73 todo = min(bytes, (ulong)DISP_LINE_LEN);
74 for (i = 0; i < todo; i += size, ptr += size) {
76 *(u32 *)ptr = inl(addr + i);
78 *(u16 *)ptr = inw(addr + i);
82 print_buffer(addr, buf, size, todo / size,
83 DISP_LINE_LEN / size);
94 int do_io_iow(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
100 return CMD_RET_USAGE;
102 size = cmd_get_data_size(argv[0], 4);
106 addr = hextoul(argv[1], NULL);
107 val = hextoul(argv[2], NULL);
110 outl((u32) val, addr);
112 outw((u16) val, addr);
114 outb((u8) val, addr);
119 /**************************************************/
120 U_BOOT_CMD(iod, 3, 1, do_io_iod,
121 "IO space display", "[.b, .w, .l] address");
123 U_BOOT_CMD(iow, 3, 0, do_io_iow,
125 "[.b, .w, .l] address value");