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https://github.com/tillitis/tillitis-key1.git
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6ef6c36f6f
Adds syscalls: - ALLOCATE_AREA - DEALLOCATE_AREA - WRITE_DATA - READ_DATA and code to access the filesystem and the flash over SPI. Based on original work by Daniel Jobson <jobson@tillitis.see> for these files: - auth_app.[ch] - flash.[ch] - spi.[ch] - partition_table.[ch] - rng.[ch] - storage.[ch] which are used with small changes to integrate with the new syscall method. Co-authored-by: Daniel Jobson <jobson@tillitis.se> Co-authored-by: Mikael Ågren <mikael@tillitis.se>
30 lines
639 B
C
30 lines
639 B
C
// Copyright (C) 2024 - Tillitis AB
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// SPDX-License-Identifier: GPL-2.0-only
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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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//
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//
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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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