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author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-08-02 10:01:58 +1000 |
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committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-11-30 15:34:05 +1100 |
commit | cf5cbf9f8085eb45316d6e3c888a77cc50696701 (patch) | |
tree | 992a3ae5d78703bb67b660508fac204dd02243ce /arch/powerpc | |
parent | fa2b4e54d41f3c9f1bee6a7d63ecd4f0ab161e89 (diff) | |
download | op-kernel-dev-cf5cbf9f8085eb45316d6e3c888a77cc50696701.zip op-kernel-dev-cf5cbf9f8085eb45316d6e3c888a77cc50696701.tar.gz |
powerpc/nvram: Add nvram_find_partition()
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r-- | arch/powerpc/kernel/nvram_64.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/nvram_64.c b/arch/powerpc/kernel/nvram_64.c index 6dd2700..01e6844 100644 --- a/arch/powerpc/kernel/nvram_64.c +++ b/arch/powerpc/kernel/nvram_64.c @@ -429,6 +429,28 @@ static int nvram_get_partition_size(loff_t data_index) } +/** + * nvram_find_partition - Find an nvram partition by signature and name + * @name: Name of the partition or NULL for any name + * @sig: Signature to test against + * @out_size: if non-NULL, returns the size of the data part of the partition + */ +loff_t nvram_find_partition(const char *name, int sig, int *out_size) +{ + struct nvram_partition *p; + + list_for_each_entry(p, &nvram_part->partition, partition) { + if (p->header.signature == sig && + (!name || !strncmp(p->header.name, name, 12))) { + if (out_size) + *out_size = (p->header.length - 1) * + NVRAM_BLOCK_LEN; + return p->index + NVRAM_HEADER_LEN; + } + } + return 0; +} + /* nvram_setup_partition * * This will setup the partition we need for buffering the |