mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
90526e9fba
Move this header out of the common header. Network support is used in quite a few places but it still does not warrant blanket inclusion. Note that this net.h header itself has quite a lot in it. It could be split into the driver-mode support, functions, structures, checksumming, etc. Signed-off-by: Simon Glass <sjg@chromium.org>
58 lines
1014 B
C
58 lines
1014 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (c) 2019, Linaro Limited
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <rand.h>
|
|
#include <rng.h>
|
|
|
|
#include <linux/string.h>
|
|
|
|
static int sandbox_rng_read(struct udevice *dev, void *data, size_t len)
|
|
{
|
|
unsigned int i, seed, random;
|
|
unsigned char *buf = data;
|
|
size_t nrem, nloops;
|
|
|
|
if (!len)
|
|
return 0;
|
|
|
|
nloops = len / sizeof(random);
|
|
seed = get_timer(0) ^ rand();
|
|
srand(seed);
|
|
|
|
for (i = 0, nrem = len; i < nloops; i++) {
|
|
random = rand();
|
|
memcpy(buf, &random, sizeof(random));
|
|
buf += sizeof(random);
|
|
nrem -= sizeof(random);
|
|
}
|
|
|
|
if (nrem) {
|
|
random = rand();
|
|
memcpy(buf, &random, nrem);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dm_rng_ops sandbox_rng_ops = {
|
|
.read = sandbox_rng_read,
|
|
};
|
|
|
|
static const struct udevice_id sandbox_rng_match[] = {
|
|
{
|
|
.compatible = "sandbox,sandbox-rng",
|
|
},
|
|
{},
|
|
};
|
|
|
|
U_BOOT_DRIVER(sandbox_rng) = {
|
|
.name = "sandbox-rng",
|
|
.id = UCLASS_RNG,
|
|
.of_match = sandbox_rng_match,
|
|
.ops = &sandbox_rng_ops,
|
|
};
|