mirror of
https://source.denx.de/u-boot/u-boot.git
synced 2025-12-19 08:21:27 +01:00
4800a6a0b3
The header of LiMon imported files reference a License file which does not exist in U-Boot. Some files were forgotten when adding the SPDX-License-Identifier. The LiMon files were originally licensed under GPLv2 as can be seen in commit [2ea91039]. Based on this commit, add the correct SPDX license identifier. While at it drop the reference to the non-existing License file from all LiMon files and update the SPDX-License-Identifier to SPDX version 3. Signed-off-by: Max Merchel <Max.Merchel@ew.tq-group.com>
60 lines
1.1 KiB
C
60 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copied from LiMon - BOOTP.
|
|
*
|
|
* Copyright 1994, 1995, 2000 Neil Russell.
|
|
* Copyright 2000 Paolo Scaffardi
|
|
*/
|
|
|
|
#ifndef __NET_RAND_H__
|
|
#define __NET_RAND_H__
|
|
|
|
#include <dm/uclass.h>
|
|
#include <rng.h>
|
|
|
|
/*
|
|
* Return a seed for the PRNG derived from the eth0 MAC address.
|
|
*/
|
|
static inline unsigned int seed_mac(void)
|
|
{
|
|
unsigned char enetaddr[ARP_HLEN];
|
|
unsigned int seed;
|
|
|
|
/* get our mac */
|
|
memcpy(enetaddr, eth_get_ethaddr(), ARP_HLEN);
|
|
|
|
seed = enetaddr[5];
|
|
seed ^= enetaddr[4] << 8;
|
|
seed ^= enetaddr[3] << 16;
|
|
seed ^= enetaddr[2] << 24;
|
|
seed ^= enetaddr[1];
|
|
seed ^= enetaddr[0] << 8;
|
|
|
|
return seed;
|
|
}
|
|
|
|
/*
|
|
* Seed the random number generator using the eth0 MAC address.
|
|
*/
|
|
static inline void srand_mac(void)
|
|
{
|
|
int ret;
|
|
struct udevice *devp;
|
|
u32 randv = 0;
|
|
|
|
if (CONFIG_IS_ENABLED(DM_RNG)) {
|
|
ret = uclass_get_device(UCLASS_RNG, 0, &devp);
|
|
if (ret) {
|
|
ret = dm_rng_read(devp, &randv, sizeof(randv));
|
|
if (ret < 0)
|
|
randv = 0;
|
|
}
|
|
}
|
|
if (randv)
|
|
srand(randv);
|
|
else
|
|
srand(seed_mac());
|
|
}
|
|
|
|
#endif /* __NET_RAND_H__ */
|