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5f3a065aaa
- Add REUSE configuration - Add compliant licenses in LICENSES/ - Add copyright SPDX tags - Run REUSE complicance check in CI - Remove spdx-ensure
28 lines
656 B
C
28 lines
656 B
C
// SPDX-FileCopyrightText: 2024 Tillitis AB <tillitis.se>
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// SPDX-License-Identifier: BSD-2-Clause
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#include "rng.h"
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#include <tkey/tk1_mem.h>
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#include <stdint.h>
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// clang-format off
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static volatile uint32_t *trng_status = (volatile uint32_t *)TK1_MMIO_TRNG_STATUS;
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static volatile uint32_t *trng_entropy = (volatile uint32_t *)TK1_MMIO_TRNG_ENTROPY;
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// clang-format on
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uint32_t rng_get_word(void)
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{
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while ((*trng_status & (1 << TK1_MMIO_TRNG_STATUS_READY_BIT)) == 0) {
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}
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return *trng_entropy;
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}
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uint32_t rng_xorwow(uint32_t state, uint32_t acc)
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{
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state ^= state << 13;
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state ^= state >> 17;
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state ^= state << 5;
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state += acc;
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return state;
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}
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