bca2ef672e
With MMU being converted to a non-user-configurable option, we can rely on that exclusively to know whether arch_mem_map() and arch_mem_unmap() are available and we can remove the workarounds in POSIX at the Kconfig level. Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
80 lines
2.7 KiB
Plaintext
80 lines
2.7 KiB
Plaintext
# Copyright (c) 2024 BayLibre SAS
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#
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# SPDX-License-Identifier: Apache-2.0
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menu "POSIX memory"
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config POSIX_PAGE_SIZE
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hex
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# TODO: something similar and arch-independent for MPUs
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default MMU_PAGE_SIZE if MMU
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default 0x40
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help
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This option is not user-configurable.
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config POSIX_SHARED_MEMORY_OBJECTS
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bool "POSIX shared memory objects"
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select SYS_HASH_FUNC32
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select SYS_HASH_FUNC32_DJB2
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select FDTABLE
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select POSIX_MAPPED_FILES
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help
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Select 'y' here and Zephyr will provide implementations of shm_open() and shm_unlink().
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For more information, please see
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https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/V2_chap02.html
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https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_port.html#tag_24_03_04
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config POSIX_MAPPED_FILES
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bool "POSIX memory-mapped files"
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help
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Select 'y' here and Zephyr will provide support for mmap(), msync(), and munmap().
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Note: This feature depends on hardware MMU support. If the underlying platform does not
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support an MMU, then affected POSIX API functions may return -1 and set errno to ENOTSUP.
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For more information, please see
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https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/V2_chap02.html
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https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_port.html#tag_24_03_04
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if POSIX_MAPPED_FILES
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config POSIX_MEMLOCK
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bool "POSIX memory locking"
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help
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Select 'y' here and Zephyr will provide support for mlockall() and munlockall().
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Note: This feature depends on hardware MMU support as well as DEMAND_PAGING. If the
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underlying platform does not support an MMU or DEMAND_PAGING, then affected POSIX API
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functions will return -1 and set errno to ENOTSUP.
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For more information, please see
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https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/V2_chap02.html
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https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_port.html#tag_24_03_04
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config POSIX_MEMLOCK_RANGE
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bool "POSIX range memory locking"
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imply DEMAND_PAGING
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help
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Select 'y' here and Zephyr will provide support for mlock() and munlock().
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Note: This feature depends on hardware MMU support. If the underlying platform does not
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support an MMU, then affected POSIX API functions will return -1 and set errno to ENOTSUP.
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For more information, please see
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https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/V2_chap02.html
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https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_port.html#tag_24_03_04
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endif
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config POSIX_MEMORY_PROTECTION
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bool "POSIX memory protection"
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help
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Select 'y' here and Zephyr will provide support for mprotect().
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For more information, please see
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https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/V2_chap02.html
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https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_port.html#tag_24_03_04
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endmenu
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