Add qemu 2.4.0

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

diff --git a/qemu/roms/u-boot/fs/reiserfs/dev.c b/qemu/roms/u-boot/fs/reiserfs/dev.c
new file mode 100644 (file)
index 0000000..6825545
--- /dev/null
+++ b/qemu/roms/u-boot/fs/reiserfs/dev.c
@@ -0,0 +1,98 @@
+/*
+ *  (C) Copyright 2003 - 2004
+ *  Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+
+#include <common.h>
+#include <config.h>
+#include <reiserfs.h>
+
+#include "reiserfs_private.h"
+
+static block_dev_desc_t *reiserfs_block_dev_desc;
+static disk_partition_t *part_info;
+
+
+void reiserfs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info)
+{
+       reiserfs_block_dev_desc = rbdd;
+       part_info = info;
+}
+
+
+int reiserfs_devread (int sector, int byte_offset, int byte_len, char *buf)
+{
+       char sec_buf[SECTOR_SIZE];
+       unsigned block_len;
+/*
+       unsigned len = byte_len;
+       u8 *start = buf;
+*/
+       /*
+       *  Check partition boundaries
+       */
+       if (sector < 0
+           || ((sector + ((byte_offset + byte_len - 1) >> SECTOR_BITS))
+           >= part_info->size)) {
+/*             errnum = ERR_OUTSIDE_PART; */
+               printf (" ** reiserfs_devread() read outside partition\n");
+               return 0;
+       }
+
+       /*
+        *  Get the read to the beginning of a partition.
+        */
+       sector += byte_offset >> SECTOR_BITS;
+       byte_offset &= SECTOR_SIZE - 1;
+
+#if defined(DEBUG)
+       printf (" <%d, %d, %d> ", sector, byte_offset, byte_len);
+#endif
+
+
+       if (reiserfs_block_dev_desc == NULL)
+               return 0;
+
+
+       if (byte_offset != 0) {
+               /* read first part which isn't aligned with start of sector */
+               if (reiserfs_block_dev_desc->block_read(reiserfs_block_dev_desc->dev,
+                   part_info->start + sector, 1,
+                   (unsigned long *)sec_buf) != 1) {
+                       printf (" ** reiserfs_devread() read error\n");
+                       return 0;
+               }
+               memcpy(buf, sec_buf+byte_offset, min(SECTOR_SIZE-byte_offset, byte_len));
+               buf+=min(SECTOR_SIZE-byte_offset, byte_len);
+               byte_len-=min(SECTOR_SIZE-byte_offset, byte_len);
+               sector++;
+       }
+
+       /* read sector aligned part */
+       block_len = byte_len & ~(SECTOR_SIZE-1);
+       if (reiserfs_block_dev_desc->block_read(reiserfs_block_dev_desc->dev,
+           part_info->start + sector, block_len/SECTOR_SIZE,
+           (unsigned long *)buf) != block_len/SECTOR_SIZE) {
+               printf (" ** reiserfs_devread() read error - block\n");
+               return 0;
+       }
+       buf+=block_len;
+       byte_len-=block_len;
+       sector+= block_len/SECTOR_SIZE;
+
+       if ( byte_len != 0 ) {
+               /* read rest of data which are not in whole sector */
+               if (reiserfs_block_dev_desc->block_read(reiserfs_block_dev_desc->dev,
+                   part_info->start + sector, 1,
+                   (unsigned long *)sec_buf) != 1) {
+                       printf (" ** reiserfs_devread() read error - last part\n");
+                       return 0;
+               }
+               memcpy(buf, sec_buf, byte_len);
+       }
+
+       return 1;
+}