mirror of https://github.com/OpenIPC/firmware.git
110 lines
2.9 KiB
Diff
110 lines
2.9 KiB
Diff
diff -drupN a/fs/yaffs2/yaffs_endian.c b/fs/yaffs2/yaffs_endian.c
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--- a/fs/yaffs2/yaffs_endian.c 1970-01-01 03:00:00.000000000 +0300
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+++ b/fs/yaffs2/yaffs_endian.c 2022-06-09 05:02:35.000000000 +0300
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@@ -0,0 +1,105 @@
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+/*
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+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
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+ *
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+ * Copyright (C) 2002-2018 Aleph One Ltd.
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+ *
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+ * Created by Charles Manning <charles@aleph1.co.uk>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ *
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+ * Endian processing functions.
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+ */
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+
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+#include "yaffs_endian.h"
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+#include "yaffs_guts.h"
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+
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+
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+void yaffs_do_endian_u32(struct yaffs_dev *dev, u32 *val)
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+{
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+ if (!dev->swap_endian)
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+ return;
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+ *val = swap_u32(*val);
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+}
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+
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+void yaffs_do_endian_s32(struct yaffs_dev *dev, s32 *val)
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+{
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+ if (!dev->swap_endian)
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+ return;
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+ *val = swap_s32(*val);
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+}
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+
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+void yaffs_do_endian_oh(struct yaffs_dev *dev, struct yaffs_obj_hdr *oh)
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+{
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+ if (!dev->swap_endian)
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+ return;
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+ /* Change every field */
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+ oh->type = swap_u32(oh->type);
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+ oh->parent_obj_id = swap_u32(oh->parent_obj_id);
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+
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+ oh->yst_mode = swap_u32(oh->yst_mode);
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+
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+ oh->yst_uid = swap_u32(oh->yst_uid);
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+ oh->yst_gid = swap_u32(oh->yst_gid);
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+ oh->yst_atime = swap_u32(oh->yst_atime);
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+ oh->yst_mtime = swap_u32(oh->yst_mtime);
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+ oh->yst_ctime = swap_u32(oh->yst_ctime);
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+
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+ oh->file_size_low = swap_u32(oh->file_size_low);
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+
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+ oh->equiv_id = swap_u32(oh->equiv_id);
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+
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+ oh->yst_rdev = swap_u32(oh->yst_rdev);
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+
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+ oh->win_ctime[0] = swap_u32(oh->win_ctime[0]);
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+ oh->win_ctime[1] = swap_u32(oh->win_ctime[1]);
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+ oh->win_atime[0] = swap_u32(oh->win_atime[0]);
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+ oh->win_atime[1] = swap_u32(oh->win_atime[1]);
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+ oh->win_mtime[0] = swap_u32(oh->win_mtime[0]);
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+ oh->win_mtime[1] = swap_u32(oh->win_mtime[1]);
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+
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+ oh->inband_shadowed_obj_id = swap_u32(oh->inband_shadowed_obj_id);
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+ oh->inband_is_shrink = swap_u32(oh->inband_is_shrink);
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+
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+ oh->file_size_high = swap_u32(oh->file_size_high);
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+ oh->reserved[0] = swap_u32(oh->reserved[0]);
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+ oh->shadows_obj = swap_s32(oh->shadows_obj);
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+
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+ oh->is_shrink = swap_u32(oh->is_shrink);
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+}
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+
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+
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+void yaffs_do_endian_packed_tags2(struct yaffs_dev *dev,
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+ struct yaffs_packed_tags2_tags_only *ptt)
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+{
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+ if (!dev->swap_endian)
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+ return;
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+ ptt->seq_number = swap_u32(ptt->seq_number);
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+ ptt->obj_id = swap_u32(ptt->obj_id);
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+ ptt->chunk_id = swap_u32(ptt->chunk_id);
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+ ptt->n_bytes = swap_u32(ptt->n_bytes);
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+}
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+
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+void yaffs_endian_config(struct yaffs_dev *dev)
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+{
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+ u32 x = 1;
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+
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+ if (dev->tnode_size < 1)
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+ BUG();
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+
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+ dev->swap_endian = 0;
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+
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+ if (((char *)&x)[0] == 1) {
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+ /* Little Endian. */
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+ if (dev->param.stored_endian == 2 /* big endian */)
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+ dev->swap_endian = 1;
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+ } else {
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+ /* Big Endian. */
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+ if (dev->param.stored_endian == 1 /* little endian */)
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+ dev->swap_endian = 1;
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+ }
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+
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+ if (dev->swap_endian)
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+ dev->tn_swap_buffer = kmalloc(dev->tnode_size, GFP_NOFS);
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+}
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