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70 lines
2.3 KiB
70 lines
2.3 KiB
# nRF5 entropy generator driver configuration |
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# Copyright (c) 2018 Nordic Semiconductor ASA |
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# Copyright (c) 2017 Exati Tecnologia Ltda. |
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# SPDX-License-Identifier: Apache-2.0 |
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config ENTROPY_NRF_FORCE_ALT |
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bool |
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depends on SOC_COMPATIBLE_NRF |
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help |
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This option can be enabled to force an alternative implementation |
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of the entropy driver. |
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menuconfig ENTROPY_NRF5_RNG |
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bool "nRF5 RNG driver" |
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default y |
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depends on !ENTROPY_NRF_FORCE_ALT |
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depends on DT_HAS_NORDIC_NRF_RNG_ENABLED |
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select ENTROPY_HAS_DRIVER |
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help |
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This option enables the RNG peripheral, which is a random number |
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generator, based on internal thermal noise, that provides a |
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random 8-bit value to the host when read. |
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if ENTROPY_NRF5_RNG |
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config ENTROPY_NRF5_BIAS_CORRECTION |
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bool "Bias correction (uniform distribution)" |
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help |
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This option enables the RNG bias correction, which guarantees a |
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uniform distribution of 0 and 1. When this option is enabled, the time |
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to generate a byte cannot be guaranteed. |
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config ENTROPY_NRF5_THR_POOL_SIZE |
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int "Thread-mode random number pool size" |
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range ENTROPY_NRF5_THR_THRESHOLD 256 |
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default 8 |
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help |
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Buffer length in bytes used to store entropy bytes generated by the |
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hardware to make them ready for thread mode consumers. |
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Please note, that size of the pool must be a power of 2. |
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config ENTROPY_NRF5_THR_THRESHOLD |
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int "Thread-mode random number pool low-water threshold" |
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range 4 $(UINT8_MAX) |
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help |
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Low water-mark threshold in bytes to trigger entropy generation for |
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thread mode consumers. As soon as the number of available bytes in the |
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buffer goes below this number hardware entropy generation will be |
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started. |
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config ENTROPY_NRF5_ISR_POOL_SIZE |
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int "ISR-mode random number pool size" |
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range ENTROPY_NRF5_ISR_THRESHOLD 256 |
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default 16 |
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help |
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Buffer length in bytes used to store entropy bytes generated by the |
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hardware to make them ready for ISR consumers. |
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Please note, that size of the pool must be a power of 2. |
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config ENTROPY_NRF5_ISR_THRESHOLD |
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int "ISR-mode random number pool low-water threshold" |
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range 12 $(UINT8_MAX) |
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help |
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Low water-mark threshold in bytes to trigger entropy generation for |
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ISR consumers. As soon as the number of available bytes in the |
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buffer goes below this number hardware entropy generation will be |
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started. |
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endif # ENTROPY_NRF5_RNG
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