Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / fs / ext4 / dev.c

diff --git a/qemu/roms/u-boot/fs/ext4/dev.c b/qemu/roms/u-boot/fs/ext4/dev.c
new file mode 100644 (file)
index 0000000..e0b513a
--- /dev/null
+++ b/qemu/roms/u-boot/fs/ext4/dev.c
@@ -0,0 +1,146 @@
+/*
+ * (C) Copyright 2011 - 2012 Samsung Electronics
+ * EXT4 filesystem implementation in Uboot by
+ * Uma Shankar <uma.shankar@samsung.com>
+ * Manjunatha C Achar <a.manjunatha@samsung.com>
+ *
+ * made from existing ext2/dev.c file of Uboot
+ * (C) Copyright 2004
+ * esd gmbh <www.esd-electronics.com>
+ * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
+ *
+ * based on code of fs/reiserfs/dev.c by
+ *
+ * (C) Copyright 2003 - 2004
+ * Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+/*
+ * Changelog:
+ *     0.1 - Newly created file for ext4fs support. Taken from
+ *             fs/ext2/dev.c file in uboot.
+ */
+
+#include <common.h>
+#include <config.h>
+#include <ext4fs.h>
+#include <ext_common.h>
+#include "ext4_common.h"
+
+lbaint_t part_offset;
+
+static block_dev_desc_t *ext4fs_block_dev_desc;
+static disk_partition_t *part_info;
+
+void ext4fs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info)
+{
+       assert(rbdd->blksz == (1 << rbdd->log2blksz));
+       ext4fs_block_dev_desc = rbdd;
+       get_fs()->dev_desc = rbdd;
+       part_info = info;
+       part_offset = info->start;
+       get_fs()->total_sect = ((uint64_t)info->size * info->blksz) >>
+               get_fs()->dev_desc->log2blksz;
+}
+
+int ext4fs_devread(lbaint_t sector, int byte_offset, int byte_len, char *buf)
+{
+       unsigned block_len;
+       int log2blksz = ext4fs_block_dev_desc->log2blksz;
+       ALLOC_CACHE_ALIGN_BUFFER(char, sec_buf, (ext4fs_block_dev_desc ?
+                                                ext4fs_block_dev_desc->blksz :
+                                                0));
+       if (ext4fs_block_dev_desc == NULL) {
+               printf("** Invalid Block Device Descriptor (NULL)\n");
+               return 0;
+       }
+
+       /* Check partition boundaries */
+       if ((sector < 0) ||
+           ((sector + ((byte_offset + byte_len - 1) >> log2blksz))
+            >= part_info->size)) {
+               printf("%s read outside partition " LBAFU "\n", __func__,
+                      sector);
+               return 0;
+       }
+
+       /* Get the read to the beginning of a partition */
+       sector += byte_offset >> log2blksz;
+       byte_offset &= ext4fs_block_dev_desc->blksz - 1;
+
+       debug(" <" LBAFU ", %d, %d>\n", sector, byte_offset, byte_len);
+
+       if (byte_offset != 0) {
+               /* read first part which isn't aligned with start of sector */
+               if (ext4fs_block_dev_desc->
+                   block_read(ext4fs_block_dev_desc->dev,
+                               part_info->start + sector, 1,
+                               (unsigned long *) sec_buf) != 1) {
+                       printf(" ** ext2fs_devread() read error **\n");
+                       return 0;
+               }
+               memcpy(buf, sec_buf + byte_offset,
+                       min(ext4fs_block_dev_desc->blksz
+                           - byte_offset, byte_len));
+               buf += min(ext4fs_block_dev_desc->blksz
+                          - byte_offset, byte_len);
+               byte_len -= min(ext4fs_block_dev_desc->blksz
+                               - byte_offset, byte_len);
+               sector++;
+       }
+
+       if (byte_len == 0)
+               return 1;
+
+       /* read sector aligned part */
+       block_len = byte_len & ~(ext4fs_block_dev_desc->blksz - 1);
+
+       if (block_len == 0) {
+               ALLOC_CACHE_ALIGN_BUFFER(u8, p, ext4fs_block_dev_desc->blksz);
+
+               block_len = ext4fs_block_dev_desc->blksz;
+               ext4fs_block_dev_desc->block_read(ext4fs_block_dev_desc->dev,
+                                                 part_info->start + sector,
+                                                 1, (unsigned long *)p);
+               memcpy(buf, p, byte_len);
+               return 1;
+       }
+
+       if (ext4fs_block_dev_desc->block_read(ext4fs_block_dev_desc->dev,
+                                              part_info->start + sector,
+                                              block_len >> log2blksz,
+                                              (unsigned long *) buf) !=
+                                              block_len >> log2blksz) {
+               printf(" ** %s read error - block\n", __func__);
+               return 0;
+       }
+       block_len = byte_len & ~(ext4fs_block_dev_desc->blksz - 1);
+       buf += block_len;
+       byte_len -= block_len;
+       sector += block_len / ext4fs_block_dev_desc->blksz;
+
+       if (byte_len != 0) {
+               /* read rest of data which are not in whole sector */
+               if (ext4fs_block_dev_desc->
+                   block_read(ext4fs_block_dev_desc->dev,
+                               part_info->start + sector, 1,
+                               (unsigned long *) sec_buf) != 1) {
+                       printf("* %s read error - last part\n", __func__);
+                       return 0;
+               }
+               memcpy(buf, sec_buf, byte_len);
+       }
+       return 1;
+}
+
+int ext4_read_superblock(char *buffer)
+{
+       struct ext_filesystem *fs = get_fs();
+       int sect = SUPERBLOCK_START >> fs->dev_desc->log2blksz;
+       int off = SUPERBLOCK_START % fs->dev_desc->blksz;
+
+       return ext4fs_devread(sect, off, SUPERBLOCK_SIZE,
+                               buffer);
+}