Index: lib_generic/chromeos/boot_device.c |
diff --git a/lib_generic/chromeos/boot_device.c b/lib_generic/chromeos/boot_device.c |
new file mode 100644 |
index 0000000000000000000000000000000000000000..5a57e6d85673c1def9be6343a18d9843da02d249 |
--- /dev/null |
+++ b/lib_generic/chromeos/boot_device.c |
@@ -0,0 +1,119 @@ |
+/* |
+ * Copyright 2010, Google Inc. |
+ * All rights reserved. |
+ * |
+ * Redistribution and use in source and binary forms, with or without |
+ * modification, are permitted provided that the following conditions are |
+ * met: |
+ * |
+ * * Redistributions of source code must retain the above copyright |
+ * notice, this list of conditions and the following disclaimer. |
+ * * Redistributions in binary form must reproduce the above |
+ * copyright notice, this list of conditions and the following disclaimer |
+ * in the documentation and/or other materials provided with the |
+ * distribution. |
+ * * Neither the name of Google Inc. nor the names of its |
+ * contributors may be used to endorse or promote products derived from |
+ * this software without specific prior written permission. |
+ * |
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
+ * |
+ * 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 <config.h> |
+#include <common.h> |
+#include <part.h> |
+#include <boot_device.h> |
+ |
+static struct { |
+ block_dev_desc_t *dev_desc; |
+ ulong offset, limit; |
+} bootdev_config = { |
+ .dev_desc = NULL, |
+ .offset = 0u, |
+ .limit = 0u |
+}; |
+ |
+block_dev_desc_t *get_bootdev(void) |
+{ |
+ return bootdev_config.dev_desc; |
+} |
+ |
+int set_bootdev(char *ifname, int dev, int part) |
+{ |
+ disk_partition_t part_info; |
+ |
+ if ((bootdev_config.dev_desc = get_dev(ifname, dev)) == NULL) |
+ goto cleanup; /* block device not supported */ |
+ |
+ /* largest address not available in block_dev_desc_t */ |
+ if (part == 0) { |
+ bootdev_config.limit = ~0; |
+ return 0; |
+ } |
+ |
+ if (get_partition_info(bootdev_config.dev_desc, part, &part_info)) |
+ goto cleanup; /* cannot find partition */ |
+ |
+ bootdev_config.offset = part_info.start; |
+ bootdev_config.limit = part_info.size; |
+ |
+ return 0; |
+ |
+cleanup: |
+ bootdev_config.dev_desc = NULL; |
+ bootdev_config.offset = 0; |
+ bootdev_config.limit = 0; |
+ |
+ return 1; |
+} |
+ |
+int BootDeviceReadLBA(uint64_t lba_start, uint64_t lba_count, void *buffer) |
+{ |
+ block_dev_desc_t *dev_desc; |
+ |
+ if ((dev_desc = bootdev_config.dev_desc) == NULL) |
+ return 1; /* No boot device configured */ |
+ |
+ if (lba_start + lba_count > bootdev_config.limit) |
+ return 1; /* read out of range */ |
+ |
+ if (dev_desc->block_read(dev_desc->dev, |
+ bootdev_config.offset + lba_start, lba_count, |
+ buffer) < 0) |
+ return 1; /* error reading blocks */ |
+ |
+ return 0; |
+} |
+ |
+int BootDeviceWriteLBA(uint64_t lba_start, uint64_t lba_count, |
+ const void *buffer) |
+{ |
+ block_dev_desc_t *dev_desc; |
+ |
+ if ((dev_desc = bootdev_config.dev_desc) == NULL) |
+ return 1; /* No boot device configured */ |
+ |
+ if (lba_start + lba_count > bootdev_config.limit) |
+ return 1; /* read out of range */ |
+ |
+ if (dev_desc->block_write(dev_desc->dev, |
+ bootdev_config.offset + lba_start, lba_count, |
+ buffer) < 0) |
+ return 1; /* error reading blocks */ |
+ |
+ return 0; |
+} |