84 lines
2.5 KiB
Plaintext
84 lines
2.5 KiB
Plaintext
# Kconfig.nrf5 - nRF5 entropy generator driver configuration
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#
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# Copyright (c) 2018 Nordic Semiconductor ASA
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# Copyright (c) 2017 Exati Tecnologia Ltda.
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#
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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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if !ENTROPY_NRF_FORCE_ALT
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menuconfig ENTROPY_NRF5_RNG
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bool "nRF5 RNG driver"
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depends on SOC_COMPATIBLE_NRF
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select ENTROPY_HAS_DRIVER
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default y
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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 "Enable 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 4 255
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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 12 255
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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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config ENTROPY_NRF5_PRI
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int "RNG interrupt priority"
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range 0 2 if SOC_SERIES_NRF51X
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range 0 5 if SOC_COMPATIBLE_NRF52X
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default 2 if SOC_SERIES_NRF51X
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default 5 if SOC_COMPATIBLE_NRF52X
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help
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nRF5X RNG IRQ priority.
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endif # ENTROPY_NRF5_RNG
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endif # !ENTROPY_NRF_FORCE_ALT
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