PCHB(4) - Device Drivers Manual # PCHB(4) - Device Drivers Manual
NAME # pchb - PCI-Host Bridge
SYNOPSIS # pchb* at pci? pci* at pchb?
DESCRIPTION # The pchb driver provides support for PCI-Host adapter-specific functions. Support is provided for the following devices:
i450 PCIset (Orion)
Supports additional PCI buses.
Reliance Computer ROSB4, CNB20HE, CNB20LE
Supports additional PCI buses.
i82424ZX (Saturn)
Disables CPU-PCI write posting.
i82443BX
Provides workaround for the following errata: “An incorrect address may be driven on the DRAM bus, resulting in memory data being fetched from the wrong location.
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QCRNG(4) - Device Drivers Manual # QCRNG(4) - Device Drivers Manual
NAME # qcrng - Qualcomm Snapdragon random number generator
SYNOPSIS # qcrng* at fdt?
DESCRIPTION # The qcrng driver provides support for the random number generator found on the Qualcomm Snapdragon SoCs.
It feeds the random subsystem’s entropy pool with 32 bits of random data every second.
SEE ALSO # intro(4), random(4), arc4random(9)
HISTORY # The qcrng driver first appeared in OpenBSD 7.
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RANDOM(4) - Device Drivers Manual # RANDOM(4) - Device Drivers Manual
NAME # random, urandom - random data source device
DESCRIPTION # The urandom device produces high quality pseudo-random output data without ever blocking.
Entropy data stored previously is provided to the kernel during the boot sequence and used as inner-state of a stream cipher. High quality data is available immediately upon kernel startup. System activity (such as disk, network, and clock device interrupts), and hardware random generator output is collected, whitened with a crc and hash, then periodically folded together with stream cipher inner-state and outer-state to create a new inner state.
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RKRNG(4) - Device Drivers Manual # RKRNG(4) - Device Drivers Manual
NAME # rkrng - Rockchip random number generator
SYNOPSIS # rkrng* at fdt?
DESCRIPTION # The rkrng driver provides support for the random number generator found on the Rockchip SoCs.
It feeds the random subsystem’s entropy pool with 256 bits of random data every second.
SEE ALSO # intro(4), random(4), arc4random(9)
HISTORY # The rkrng driver first appeared in OpenBSD 6.
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STFRNG(4) - Device Drivers Manual (riscv64) # STFRNG(4) - Device Drivers Manual (riscv64)
NAME # stfrng - StarFive JH7110 random number generator
SYNOPSIS # stfrng* at fdt?
DESCRIPTION # The stfrng driver provides support for the random number generator found on the StarFive JH7110 SoC.
It feeds the random subsystem’s entropy pool with 256 bits of random data every second.
SEE ALSO # intro(4), random(4), arc4random(9)
HISTORY # The stfrng driver first appeared in OpenBSD 7.
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VRNG(4) - Device Drivers Manual (sparc64) # VRNG(4) - Device Drivers Manual (sparc64)
NAME # vrng - virtual random number generator
SYNOPSIS # vrng0 at vbus?
DESCRIPTION # The vrng driver provides support for the random number generation service provided by the UltraSPARC Hypervisor as found on sun4v systems.
Driven by periodic checks for available data from the generator, vrng supplies entropy to the random(4) driver for common usage.
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