| /* |
| * 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 |
