Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / mtd / ubi / misc.c

diff --git a/qemu/roms/u-boot/drivers/mtd/ubi/misc.c b/qemu/roms/u-boot/drivers/mtd/ubi/misc.c
new file mode 100644 (file)
index 0000000..5ff55b4
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/mtd/ubi/misc.c
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ *
+ * Author: Artem Bityutskiy (Битюцкий Артём)
+ */
+
+/* Here we keep miscellaneous functions which are used all over the UBI code */
+
+#include <ubi_uboot.h>
+#include "ubi.h"
+
+/**
+ * calc_data_len - calculate how much real data is stored in a buffer.
+ * @ubi: UBI device description object
+ * @buf: a buffer with the contents of the physical eraseblock
+ * @length: the buffer length
+ *
+ * This function calculates how much "real data" is stored in @buf and returnes
+ * the length. Continuous 0xFF bytes at the end of the buffer are not
+ * considered as "real data".
+ */
+int ubi_calc_data_len(const struct ubi_device *ubi, const void *buf,
+                     int length)
+{
+       int i;
+
+       ubi_assert(!(length & (ubi->min_io_size - 1)));
+
+       for (i = length - 1; i >= 0; i--)
+               if (((const uint8_t *)buf)[i] != 0xFF)
+                       break;
+
+       /* The resulting length must be aligned to the minimum flash I/O size */
+       length = ALIGN(i + 1, ubi->min_io_size);
+       return length;
+}
+
+/**
+ * ubi_check_volume - check the contents of a static volume.
+ * @ubi: UBI device description object
+ * @vol_id: ID of the volume to check
+ *
+ * This function checks if static volume @vol_id is corrupted by fully reading
+ * it and checking data CRC. This function returns %0 if the volume is not
+ * corrupted, %1 if it is corrupted and a negative error code in case of
+ * failure. Dynamic volumes are not checked and zero is returned immediately.
+ */
+int ubi_check_volume(struct ubi_device *ubi, int vol_id)
+{
+       void *buf;
+       int err = 0, i;
+       struct ubi_volume *vol = ubi->volumes[vol_id];
+
+       if (vol->vol_type != UBI_STATIC_VOLUME)
+               return 0;
+
+       buf = vmalloc(vol->usable_leb_size);
+       if (!buf)
+               return -ENOMEM;
+
+       for (i = 0; i < vol->used_ebs; i++) {
+               int size;
+
+               if (i == vol->used_ebs - 1)
+                       size = vol->last_eb_bytes;
+               else
+                       size = vol->usable_leb_size;
+
+               err = ubi_eba_read_leb(ubi, vol, i, buf, 0, size, 1);
+               if (err) {
+                       if (mtd_is_eccerr(err))
+                               err = 1;
+                       break;
+               }
+       }
+
+       vfree(buf);
+       return err;
+}
+
+/**
+ * ubi_calculate_rsvd_pool - calculate how many PEBs must be reserved for bad
+ * eraseblock handling.
+ * @ubi: UBI device description object
+ */
+void ubi_calculate_reserved(struct ubi_device *ubi)
+{
+       ubi->beb_rsvd_level = ubi->good_peb_count/100;
+       ubi->beb_rsvd_level *= CONFIG_MTD_UBI_BEB_RESERVE;
+       if (ubi->beb_rsvd_level < MIN_RESEVED_PEBS)
+               ubi->beb_rsvd_level = MIN_RESEVED_PEBS;
+}