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authorpatacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>2012-09-11 13:53:44 +0000
committerpatacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>2012-09-11 13:53:44 +0000
commit9f572dff87614ce1d025e8d98fac36db13bcfd71 (patch)
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Add support for DMA memory allocator to FAT file system
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5127 42af7a65-404d-4744-a932-0658087f49c3
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by Kate).
* arch/avr/src: Fixes from AVR32 build errors that have crept in
over the time; incorporated Kconfig for AVR3 (Richard Cochran).
+ * fs/fat and include/nuttx/fs/fat.h: The FAT file system allocates
+ memory for sector I/O buffers used to exchange data with the
+ configured block driver. In some contexts, the block driver may
+ require DMA-capable memory. If CONFIG_FAT_DMAMEMORY is defined,
+ then the FAT FS will use platform-provided DMA memory allocators
+ to allocate the block driver I/O buffers.