mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-03 18:10:13 +00:00
29 lines
671 B
C
29 lines
671 B
C
|
/*
|
||
|
|
* net.h - misc Blackfin network helpers
|
||
|
|
*
|
||
|
|
* Copyright (c) 2008-2009 Analog Devices Inc.
|
||
|
|
*
|
||
|
|
* Licensed under the GPL-2 or later.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __ASM_BFIN_RAND_MAC__
|
||
|
|
#define __ASM_BFIN_RAND_MAC__
|
||
|
|
|
||
|
|
/* If the board does not have a real MAC assigned to it, then generate a
|
||
|
|
* locally administrated pseudo-random one based on CYCLES and compile date.
|
||
|
|
*/
|
||
|
|
static inline void bfin_gen_rand_mac(uchar *mac_addr)
|
||
|
|
{
|
||
|
|
/* make something up */
|
||
|
|
const char s[] = __DATE__;
|
||
|
|
size_t i;
|
||
|
|
u32 cycles;
|
||
|
|
for (i = 0; i < 6; ++i) {
|
||
|
|
asm("%0 = CYCLES;" : "=r" (cycles));
|
||
|
|
mac_addr[i] = cycles ^ s[i];
|
||
|
|
}
|
||
|
|
mac_addr[0] = (mac_addr[0] | 0x02) & ~0x01; /* make it local unicast */
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|