Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / common / cmd_read.c

diff --git a/qemu/roms/u-boot/common/cmd_read.c b/qemu/roms/u-boot/common/cmd_read.c
new file mode 100644 (file)
index 0000000..f0fc9bf
--- /dev/null
+++ b/qemu/roms/u-boot/common/cmd_read.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <part.h>
+
+int do_read(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+       char *ep;
+       block_dev_desc_t *dev_desc = NULL;
+       int dev;
+       int part = 0;
+       disk_partition_t part_info;
+       ulong offset = 0u;
+       ulong limit = 0u;
+       void *addr;
+       uint blk;
+       uint cnt;
+
+       if (argc != 6) {
+               cmd_usage(cmdtp);
+               return 1;
+       }
+
+       dev = (int)simple_strtoul(argv[2], &ep, 16);
+       if (*ep) {
+               if (*ep != ':') {
+                       printf("Invalid block device %s\n", argv[2]);
+                       return 1;
+               }
+               part = (int)simple_strtoul(++ep, NULL, 16);
+       }
+
+       dev_desc = get_dev(argv[1], dev);
+       if (dev_desc == NULL) {
+               printf("Block device %s %d not supported\n", argv[1], dev);
+               return 1;
+       }
+
+       addr = (void *)simple_strtoul(argv[3], NULL, 16);
+       blk = simple_strtoul(argv[4], NULL, 16);
+       cnt = simple_strtoul(argv[5], NULL, 16);
+
+       if (part != 0) {
+               if (get_partition_info(dev_desc, part, &part_info)) {
+                       printf("Cannot find partition %d\n", part);
+                       return 1;
+               }
+               offset = part_info.start;
+               limit = part_info.size;
+       } else {
+               /* Largest address not available in block_dev_desc_t. */
+               limit = ~0;
+       }
+
+       if (cnt + blk > limit) {
+               printf("Read out of range\n");
+               return 1;
+       }
+
+       if (dev_desc->block_read(dev, offset + blk, cnt, addr) < 0) {
+               printf("Error reading blocks\n");
+               return 1;
+       }
+
+       return 0;
+}
+
+U_BOOT_CMD(
+       read,   6,      0,      do_read,
+       "Load binary data from a partition",
+       "<interface> <dev[:part]> addr blk# cnt"
+);