mirror of
https://github.com/tillitis/tillitis-key1.git
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2c1c05f180
- Add per app flash storage
- Adds four data areas. An app can allocate an area. Once allocated
the area is tied to the CDI of the app and can only be
read/written/deallocated by the same app.
- Add two pre loaded app slots to flash
- Load an app from the first slot at boot. The app digest must match a
specific digest specified in firmware.
- Optionally load an app from the second slot
- Add a resetinfo area in FW_RAM which is used to signal an app's intent
of resetting the system and, optionally, pass data to firmware or the
next app in a bootchain.
Co-authored-by: Jonas Thörnblad <jonas@tillitis.se>
Co-authored-by: Mikael Ågren <mikael@tillitis.se>
Co-authored-by: Daniel Jobson <jobson@tillitis.se>
28 lines
634 B
C
28 lines
634 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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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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