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Use common ether_crc32_le() for multicast hash.

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This commit is contained in:
tsutsui 2009-09-19 04:55:45 +00:00
parent bbb05cc64a
commit 13855cad09
1 changed files with 4 additions and 21 deletions
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25
sys/dev/ic/hme.c
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@ -1,4 +1,4 @@
/* $NetBSD: hme.c,v 1.82 2009/09/18 12:40:15 tsutsui Exp $ */
/* $NetBSD: hme.c,v 1.83 2009/09/19 04:55:45 tsutsui Exp $ */
/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
@ -34,7 +34,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: hme.c,v 1.82 2009/09/18 12:40:15 tsutsui Exp $");
__KERNEL_RCSID(0, "$NetBSD: hme.c,v 1.83 2009/09/19 04:55:45 tsutsui Exp $");
/* #define HMEDEBUG */
@ -1561,11 +1561,9 @@ hme_setladrf(struct hme_softc *sc)
struct ethercom *ec = &sc->sc_ethercom;
bus_space_tag_t t = sc->sc_bustag;
bus_space_handle_t mac = sc->sc_mac;
u_char *cp;
uint32_t v;
uint32_t crc;
uint32_t hash[4];
uint32_t v;
int len;
/* Clear hash table */
hash[3] = hash[2] = hash[1] = hash[0] = 0;
@ -1609,23 +1607,8 @@ hme_setladrf(struct hme_softc *sc)
goto chipit;
}
cp = enm->enm_addrlo;
crc = 0xffffffff;
for (len = sizeof(enm->enm_addrlo); --len >= 0;) {
int octet = *cp++;
int i;
crc = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN);
#define MC_POLY_LE 0xedb88320UL /* mcast crc, little endian */
for (i = 0; i < 8; i++) {
if ((crc & 1) ^ (octet & 1)) {
crc >>= 1;
crc ^= MC_POLY_LE;
} else {
crc >>= 1;
}
octet >>= 1;
}
}
/* Just want the 6 most significant bits. */
crc >>= 26;