diff options
Diffstat (limited to 'lib_generic/crc32.c')
| -rw-r--r-- | lib_generic/crc32.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/lib_generic/crc32.c b/lib_generic/crc32.c index b882daa..58cd22e 100644 --- a/lib_generic/crc32.c +++ b/lib_generic/crc32.c @@ -198,3 +198,30 @@ uint32_t ZEXPORT crc32_no_comp(uint32_t crc, const Bytef *buf, uInt len) } #endif + +/* + * Calculate the crc32 checksum triggering the watchdog every 'chunk_sz' bytes + * of input. + */ +ulong crc32_wd (ulong crc, const unsigned char *buf, uint len, uint chunk_sz) +{ +#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG) + const unsigned char *end, *curr; + int chunk; + + curr = buf; + end = buf + len; + while (curr < end) { + chunk = end - curr; + if (chunk > chunk_sz) + chunk = chunk_sz; + crc = crc32 (crc, curr, chunk); + curr += chunk; + WATCHDOG_RESET (); + } +#else + crc = crc32 (crc, buf, len); +#endif + + return crc; +} |