0bb25d2e17
Packet buffer can be used for sharing data between cores. In that case when any core has data cache then data cache handling must be enabled in the module. However, it shall never be enabled when the packet buffer is used on a single core. Adding that information to the documentation. Signed-off-by: Krzysztof Chruściński <krzysztof.chruscinski@nordicsemi.no>
130 lines
3.6 KiB
Text
130 lines
3.6 KiB
Text
# Copyright (c) 2016 Intel Corporation
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# SPDX-License-Identifier: Apache-2.0
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menu "OS Support Library"
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config FDTABLE
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bool "File descriptor table"
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help
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This file provides generic file descriptor table implementation, suitable
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for any I/O object implementing POSIX I/O semantics (i.e. read/write +
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aux operations).
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config ZVFS_OPEN_MAX
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int "Maximum number of open file descriptors"
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default 16 if WIFI_NM_WPA_SUPPLICANT
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default 16 if POSIX_API
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default 4
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help
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Maximum number of open file descriptors, this includes
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files, sockets, special devices, etc.
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config PRINTK_SYNC
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bool "Serialize printk() calls"
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default y if SMP && MP_MAX_NUM_CPUS > 1 && !(EFI_CONSOLE && LOG)
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help
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When true, a spinlock will be taken around the output from a
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single printk() call, preventing the output data from
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interleaving with concurrent usage from another CPU or an
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preempting interrupt.
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config MPSC_PBUF
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bool "Multi producer, single consumer packet buffer"
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select TIMEOUT_64BIT
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help
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Enable usage of mpsc packet buffer. Packet buffer is capable of
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storing variable length packets in a circular way and operate directly
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on the buffer memory.
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config SPSC_PBUF
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bool "Single producer, single consumer packet buffer"
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help
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Enable usage of spsc packet buffer. Packet buffer is capable of
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storing variable length packets in a circular way and operate directly
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on the buffer memory.
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if SPSC_PBUF
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choice SPSC_PBUF_CACHE_HANDLING
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prompt "Cache handling"
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default SPSC_PBUF_CACHE_ALWAYS if SPSC_PBUF_USE_CACHE && !SPSC_PBUF_NO_CACHE
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default SPSC_PBUF_CACHE_NEVER if !SPSC_PBUF_USE_CACHE && SPSC_PBUF_NO_CACHE
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default SPSC_PBUF_CACHE_FLAG
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config SPSC_PBUF_CACHE_FLAG
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bool "Use cache flag"
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help
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Use instance specific configuration flag for cache handling.
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config SPSC_PBUF_CACHE_ALWAYS
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bool "Always handle cache"
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help
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Handle cache writeback and invalidation for all instances. Option used
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to avoid runtime check and thus reduce memory footprint. Beware! It shall
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be used only if all packet buffer instances are used for data sharing
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between cores.
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config SPSC_PBUF_CACHE_NEVER
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bool "Never handle cache"
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help
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Discar cache handling for all instances. Option used to avoid runtime
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check and thus reduce memory footprint.
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endchoice
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config SPSC_PBUF_USE_CACHE
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bool
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config SPSC_PBUF_NO_CACHE
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bool
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if SPSC_PBUF_CACHE_FLAG || SPSC_PBUF_CACHE_ALWAYS
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config SPSC_PBUF_REMOTE_DCACHE_LINE
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int "Remote cache line size"
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default 32
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help
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If a packet buffer is used for data sharing between two cores then
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this value should be set to the data cache line size of the remote core.
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If local data cache line is detected at runtime then it should be
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maximum of local and remote line size.
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endif # SPSC_PBUF_CACHE_FLAG || SPSC_PBUF_CACHE_ALWAYS
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config SPSC_PBUF_UTILIZATION
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bool "Track maximum utilization"
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help
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When enabled, maximum utilization is tracked which can be used to
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determine the size of the packet buffer.
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endif # SPSC_PBUF
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if MPSC_PBUF
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config MPSC_CLEAR_ALLOCATED
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bool "Clear allocated packet"
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help
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When enabled packet space is zeroed before returning from allocation.
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endif
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config REBOOT
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bool "Reboot functionality"
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help
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Enable the sys_reboot() API. Enabling this can drag in other subsystems
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needed to perform a "safe" reboot (e.g. to stop the system clock before
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issuing a reset).
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config HAS_POWEROFF
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bool
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help
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Option to signal that power off functionality is implemented.
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config POWEROFF
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bool "Power off functionality"
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depends on HAS_POWEROFF
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help
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Enable support for system power off.
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rsource "Kconfig.cbprintf"
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rsource "zvfs/Kconfig"
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endmenu
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