mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-30 00:21:06 +00:00
9da3776bf6
At present the 'iod' command differs from 'md' in that it only shows a single value. It is useful to see a dump of multiple values, particularly when x86 peripherals contain register sets accessible via I/O ports. Enhance the command to match md. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com> [bmeng: correct multi-line comment format style] Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
124 lines
2.4 KiB
C
124 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (c) 2012 The Chromium OS Authors.
|
|
*/
|
|
|
|
/*
|
|
* IO space access commands.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <asm/io.h>
|
|
|
|
/* Display values from last command */
|
|
static ulong last_addr, last_size;
|
|
static ulong last_length = 0x40;
|
|
static ulong base_address;
|
|
|
|
#define DISP_LINE_LEN 16
|
|
|
|
/*
|
|
* IO Display
|
|
*
|
|
* Syntax:
|
|
* iod{.b, .w, .l} {addr}
|
|
*/
|
|
int do_io_iod(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
|
|
{
|
|
ulong addr, length, bytes;
|
|
u8 buf[DISP_LINE_LEN];
|
|
int size, todo;
|
|
|
|
/*
|
|
* We use the last specified parameters, unless new ones are
|
|
* entered.
|
|
*/
|
|
addr = last_addr;
|
|
size = last_size;
|
|
length = last_length;
|
|
|
|
if (argc < 2)
|
|
return CMD_RET_USAGE;
|
|
|
|
if ((flag & CMD_FLAG_REPEAT) == 0) {
|
|
/*
|
|
* New command specified. Check for a size specification.
|
|
* Defaults to long if no or incorrect specification.
|
|
*/
|
|
size = cmd_get_data_size(argv[0], 4);
|
|
if (size < 0)
|
|
return 1;
|
|
|
|
/* Address is specified since argc > 1 */
|
|
addr = simple_strtoul(argv[1], NULL, 16);
|
|
addr += base_address;
|
|
|
|
/*
|
|
* If another parameter, it is the length to display.
|
|
* Length is the number of objects, not number of bytes.
|
|
*/
|
|
if (argc > 2)
|
|
length = simple_strtoul(argv[2], NULL, 16);
|
|
}
|
|
|
|
bytes = size * length;
|
|
|
|
/* Print the lines */
|
|
for (; bytes > 0; addr += todo) {
|
|
u8 *ptr = buf;
|
|
int i;
|
|
|
|
todo = min(bytes, (ulong)DISP_LINE_LEN);
|
|
for (i = 0; i < todo; i += size, ptr += size) {
|
|
if (size == 4)
|
|
*(u32 *)ptr = inl(addr + i);
|
|
else if (size == 2)
|
|
*(u16 *)ptr = inw(addr + i);
|
|
else
|
|
*ptr = inb(addr + i);
|
|
}
|
|
print_buffer(addr, buf, size, todo / size,
|
|
DISP_LINE_LEN / size);
|
|
bytes -= todo;
|
|
}
|
|
|
|
last_addr = addr;
|
|
last_length = length;
|
|
last_size = size;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int do_io_iow(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
|
|
{
|
|
ulong addr, val;
|
|
int size;
|
|
|
|
if (argc != 3)
|
|
return CMD_RET_USAGE;
|
|
|
|
size = cmd_get_data_size(argv[0], 4);
|
|
if (size < 0)
|
|
return 1;
|
|
|
|
addr = simple_strtoul(argv[1], NULL, 16);
|
|
val = simple_strtoul(argv[2], NULL, 16);
|
|
|
|
if (size == 4)
|
|
outl((u32) val, addr);
|
|
else if (size == 2)
|
|
outw((u16) val, addr);
|
|
else
|
|
outb((u8) val, addr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**************************************************/
|
|
U_BOOT_CMD(iod, 3, 1, do_io_iod,
|
|
"IO space display", "[.b, .w, .l] address");
|
|
|
|
U_BOOT_CMD(iow, 3, 0, do_io_iow,
|
|
"IO space modify",
|
|
"[.b, .w, .l] address value");
|