125 lines
2.4 KiB
C
125 lines
2.4 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2012 The Chromium OS Authors.
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*/
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/*
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* IO space access commands.
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*/
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#include <common.h>
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#include <command.h>
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#include <asm/io.h>
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/* Display values from last command */
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static ulong last_addr, last_size;
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static ulong last_length = 0x40;
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static ulong base_address;
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#define DISP_LINE_LEN 16
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/*
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* IO Display
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*
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* Syntax:
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* iod{.b, .w, .l} {addr}
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*/
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int do_io_iod(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
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{
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ulong addr, length, bytes;
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u8 buf[DISP_LINE_LEN];
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int size, todo;
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/*
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* We use the last specified parameters, unless new ones are
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* entered.
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*/
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addr = last_addr;
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size = last_size;
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length = last_length;
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if (argc < 2)
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return CMD_RET_USAGE;
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if ((flag & CMD_FLAG_REPEAT) == 0) {
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/*
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* New command specified. Check for a size specification.
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* Defaults to long if no or incorrect specification.
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*/
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size = cmd_get_data_size(argv[0], 4);
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if (size < 0)
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return 1;
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/* Address is specified since argc > 1 */
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addr = simple_strtoul(argv[1], NULL, 16);
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addr += base_address;
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/*
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* If another parameter, it is the length to display.
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* Length is the number of objects, not number of bytes.
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*/
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if (argc > 2)
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length = simple_strtoul(argv[2], NULL, 16);
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}
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bytes = size * length;
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/* Print the lines */
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for (; bytes > 0; addr += todo) {
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u8 *ptr = buf;
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int i;
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todo = min(bytes, (ulong)DISP_LINE_LEN);
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for (i = 0; i < todo; i += size, ptr += size) {
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if (size == 4)
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*(u32 *)ptr = inl(addr + i);
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else if (size == 2)
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*(u16 *)ptr = inw(addr + i);
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else
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*ptr = inb(addr + i);
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}
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print_buffer(addr, buf, size, todo / size,
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DISP_LINE_LEN / size);
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bytes -= todo;
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}
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last_addr = addr;
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last_length = length;
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last_size = size;
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return 0;
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}
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int do_io_iow(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
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{
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ulong addr, val;
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int size;
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if (argc != 3)
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return CMD_RET_USAGE;
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size = cmd_get_data_size(argv[0], 4);
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if (size < 0)
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return 1;
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addr = simple_strtoul(argv[1], NULL, 16);
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val = simple_strtoul(argv[2], NULL, 16);
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if (size == 4)
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outl((u32) val, addr);
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else if (size == 2)
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outw((u16) val, addr);
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else
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outb((u8) val, addr);
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return 0;
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}
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/**************************************************/
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U_BOOT_CMD(iod, 3, 1, do_io_iod,
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"IO space display", "[.b, .w, .l] address");
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U_BOOT_CMD(iow, 3, 0, do_io_iow,
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"IO space modify",
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"[.b, .w, .l] address value");
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