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author | Timothy Pearson <tpearson@raptorengineering.com> | 2017-08-23 15:54:21 -0500 |
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committer | Timothy Pearson <tpearson@raptorengineering.com> | 2017-08-23 15:54:21 -0500 |
commit | 0223e595f4033e91e93403a7317bcc9e47676b8f (patch) | |
tree | 2ccd7127bc343f82456b76eeb0da2d380f6eaf65 /arch/blackfin/include/asm/net.h | |
download | ast2050-uboot-0223e595f4033e91e93403a7317bcc9e47676b8f.zip ast2050-uboot-0223e595f4033e91e93403a7317bcc9e47676b8f.tar.gz |
Initial import of modified u-boot tree
Original upstream URL:
git://git.denx.de/u-boot.git
Original upstream GIT hash:
62c175fbb8a0f9a926c88294ea9f7e88eb898f6c
Diffstat (limited to 'arch/blackfin/include/asm/net.h')
-rw-r--r-- | arch/blackfin/include/asm/net.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/net.h b/arch/blackfin/include/asm/net.h new file mode 100644 index 0000000..97cb466 --- /dev/null +++ b/arch/blackfin/include/asm/net.h @@ -0,0 +1,28 @@ +/* + * 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 |