GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
commit b1928b41c0
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+// 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");