210 lines
6.1 KiB
Plaintext
210 lines
6.1 KiB
Plaintext
#
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# For a description of the syntax of this configuration file,
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# see the file kconfig-language.txt in the NuttX tools repository.
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#
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choice
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prompt "Build heap manager"
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default MM_DEFAULT_MANAGER
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config MM_DEFAULT_MANAGER
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bool "Default heap manager"
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---help---
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NuttX original memory manager strategy.
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config MM_CUSTOMIZE_MANAGER
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bool "Customized heap manager"
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---help---
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Customized memory manager policy. The build will fail
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if the MM heap module not defined by customer.
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endchoice
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config MM_KERNEL_HEAP
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bool "Support a protected, kernel heap"
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default y
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depends on !BUILD_FLAT
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---help---
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Partition heap memory into two parts: (1) a protected, kernel-mode
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heap accessible only by the NuttX kernel, and (2) an unprotected
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user-mode heap for use by applications. If you are only interested
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in protected the kernel from read access, then this option is not
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necessary. If you wish to secure the kernel data as well, then
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this option should be selected.
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The kernel heap size that is used is provided a a platform-specific
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up_allocate_kheap() interface. This configuration setting is made
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available to that platform specific code. However, the
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up_allocate_kheap() interface may chose to ignore this setting if it
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has a more appropriate heap allocation strategy.
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config MM_KERNEL_HEAPSIZE
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int "Kernel heap size"
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default 8192
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depends on MM_KERNEL_HEAP
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---help---
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This is the size of the a protected, kernel-mode heap (in bytes).
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The remaining of available memory is given to the unprotected
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user-mode heap. This value may need to be aligned to units of the
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size of the smallest memory protection region.
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config MM_SMALL
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bool "Small memory model"
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default n
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---help---
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Each memory allocation has a small allocation overhead. The size
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of that overhead is normally determined by the "width" of the
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address support by the MCU. MCUs that support 16-bit addressability
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have smaller overhead than devices that support 32-bit addressability.
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However, there are many MCUs that support 32-bit addressability *but*
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have internal SRAM of size less than or equal to 64Kb. In this case,
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MM_SMALL can be defined so that those MCUs will also benefit
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from the smaller, 16-bit-based allocation overhead.
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WARNING: This selection will also change the alignment of allocated
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memory. For example, on ARM memory will have 8-byte alignment by
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default. If MM_SMALL is selected, then allocated memory will have
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only 4-byte alignment. This may be important on some platforms where
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64-bit data is in allocated structures and 8-byte alignment is required.
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config MM_REGIONS
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int "Number of memory regions"
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default 1
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---help---
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If the architecture includes multiple, non-contiguous regions of
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memory to allocate from, this specifies the number of memory regions
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that the memory manager must handle and enables the API
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mm_addregion(heap, start, end);
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config ARCH_HAVE_HEAP2
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bool
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default n
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if ARCH_HAVE_HEAP2
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config HEAP2_BASE
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hex "Start address of second user heap region"
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default 0x00000000
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---help---
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The base address of the second heap region.
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config HEAP2_SIZE
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int "Size of the second user heap region"
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default 0
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---help---
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The size of the second heap region.
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endif # ARCH_HAVE_HEAP2
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config GRAN
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bool "Enable Granule Allocator"
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default n
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---help---
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Enable granule allocator support. Allocations will be aligned to the
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granule size; allocations will be in units of the granule size.
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Larger granules will give better performance and less overhead but
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more losses of memory due to alignment and quantization waste.
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NOTE: The current implementation also restricts the maximum
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allocation size to 32 granules. That restriction could be
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eliminated with some additional coding effort.
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config GRAN_INTR
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bool "Interrupt level support"
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default n
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depends on GRAN
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---help---
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Normally mutual exclusive access to granule allocator data is assured
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using a semaphore. If this option is set then, instead, mutual
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exclusion logic will disable interrupts. While this options is more
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invasive to system performance, it will also support use of the granule
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allocator from interrupt level logic.
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config DEBUG_GRAN
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bool "Granule Allocator Debug"
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default n
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depends on GRAN && DEBUG_FEATURES
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---help---
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Just like DEBUG_MM, but only generates output from the gran
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allocation logic.
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config MM_PGALLOC
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bool "Enable Page Allocator"
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default n
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depends on ARCH_USE_MMU
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select GRAN
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---help---
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Enable support for a MMU physical page allocator based on the
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granule allocator.
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if MM_PGALLOC
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config MM_PGSIZE
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int "Page Size"
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default 4096
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---help---
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The MMU page size. Must be one of {1024, 2048, 4096, 8192, or
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16384}. This is easily extensible, but only those values are
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currently support.
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config DEBUG_PGALLOC
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bool "Page Allocator Debug"
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default n
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depends on DEBUG_FEATURES
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---help---
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Just like DEBUG_MM, but only generates output from the page
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allocation logic.
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endif # MM_PGALLOC
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config MM_SHM
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bool "Shared memory support"
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default n
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depends on MM_PGALLOC && BUILD_KERNEL && EXPERIMENTAL
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---help---
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Build in support for the shared memory interfaces shmget(), shmat(),
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shmctl(), and shmdt().
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config MM_FILL_ALLOCATIONS
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bool "Fill allocations with debug value"
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default n
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---help---
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Fill all malloc() allocations with 0xAA. This helps
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detecting uninitialized variable errors.
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config MM_CIRCBUF
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bool "Circular buffer support"
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default n
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---help---
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Build in support for the circular buffer management.
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config MM_KASAN
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bool "Kernel Address Sanitizer"
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default n
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---help---
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KASan is a fast compiler-based tool for detecting memory
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bugs in native code. After turn on this option, Please
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add -fsanitize=kernel-address to CFLAGS/CXXFLAGS too.
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config MM_BACKTRACE
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bool "Owner tracking and backtrace"
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default n
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depends on DEBUG_MM
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config MM_BACKTRACE_DEFAULT
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bool "Enable the backtrace record by default"
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default n
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depends on MM_BACKTRACE
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config MM_DUMP_ON_FAILURE
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bool "Dump heap info on allocation failure"
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default n
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depends on DEBUG_MM
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config MM_PANIC_ON_FAILURE
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bool "Panic on allocation failure"
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default n
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depends on DEBUG_MM
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source "mm/iob/Kconfig"
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