3 * Marc Singer, elf@buici.com
5 * SPDX-License-Identifier: GPL-2.0+
11 * Copied from FADS ROM, Dan Malek (dmalek@jlc.net)
17 /* Display values from last command.
18 * Memory modify remembered values are different from display memory.
20 static uint in_last_addr, in_last_size;
21 static uint out_last_addr, out_last_size, out_last_value;
24 int do_portio_out (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
26 uint addr = out_last_addr;
27 uint size = out_last_size;
28 uint value = out_last_value;
33 if ((flag & CMD_FLAG_REPEAT) == 0) {
35 * New command specified. Check for a size specification.
36 * Defaults to long if no or incorrect specification.
38 size = cmd_get_data_size (argv[0], 1);
39 addr = simple_strtoul (argv[1], NULL, 16);
40 value = simple_strtoul (argv[2], NULL, 16);
42 #if defined (CONFIG_X86)
45 unsigned short port = addr;
51 unsigned char ch = value;
52 __asm__ volatile ("out %0, %%dx"::"a" (ch), "d" (port));
57 unsigned short w = value;
58 __asm__ volatile ("out %0, %%dx"::"a" (w), "d" (port));
62 __asm__ volatile ("out %0, %%dx"::"a" (value), "d" (port));
68 #endif /* CONFIG_X86 */
72 out_last_value = value;
78 out, 3, 1, do_portio_out,
79 "write datum to IO port",
80 "[.b, .w, .l] port value\n - output to IO port"
83 int do_portio_in (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
85 uint addr = in_last_addr;
86 uint size = in_last_size;
91 if ((flag & CMD_FLAG_REPEAT) == 0) {
93 * New command specified. Check for a size specification.
94 * Defaults to long if no or incorrect specification.
96 size = cmd_get_data_size (argv[0], 1);
97 addr = simple_strtoul (argv[1], NULL, 16);
99 #if defined (CONFIG_X86)
102 unsigned short port = addr;
109 __asm__ volatile ("in %%dx, %0":"=a" (ch):"d" (port));
111 printf (" %02x\n", ch);
117 __asm__ volatile ("in %%dx, %0":"=a" (w):"d" (port));
119 printf (" %04x\n", w);
125 __asm__ volatile ("in %%dx, %0":"=a" (l):"d" (port));
127 printf (" %08lx\n", l);
132 #endif /* CONFIG_X86 */
141 in, 2, 1, do_portio_in,
142 "read data from an IO port",
143 "[.b, .w, .l] port\n"
144 " - read datum from IO port"