include/dmapool.h File Reference

DMA memory pool allocator. More...

#include <cpu/dmapool.h>

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Functions
void	dma_pool_init_coherent_physmem (struct dma_pool *dmapool, struct physmem_pool *phys_pool, unsigned int nr_objects, size_t objsize, unsigned int align_order)
	Initialize a DMA pool using the physmem allocator.

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Detailed Description

DMA memory pool allocator.

This file is just a wrapper around the CPU-specific DMA pool header.

See also:

mempool.h

• Compiler: IAR EWAVR32 and GNU GCC for AVR32
• Supported devices: All devices
• AppNote:

Author:

Atmel Corporation: http://www.atmel.com
Support and FAQ: http://support.atmel.no/

Definition in file dmapool.h.

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Function Documentation

void dma_pool_init_coherent_physmem	(	struct dma_pool *	dmapool,
		struct physmem_pool *	phys_pool,
		unsigned int	nr_objects,
		size_t	objsize,
		unsigned int	align_order
	)

Initialize a DMA pool using the physmem allocator.

This function will grab enough physical memory for nr_objects from phys_pool and use this to initialize dmapool.

Parameters:

	dmapool	The DMA pool to be initialized.
	phys_pool	The physical memory pool from which to grab memory
	nr_objects	The number of objects in the pool
	objsize	The size of each object in bytes.
	align_order	log2 of the minimum object alignment in bytes.

Precondition:

nr_objects must be at least one.

There must be enough available memory in phys_pool.

objsize must be larger than the size of a pointer.

See also:

dma_pool_init()

Definition at line 30 of file dmapool.c.

References assert, dma_pool_init_coherent_physmem(), physmem_alloc(), PHYSMEM_ALLOC_ERR, and round_up().

Referenced by dma_pool_init_coherent_physmem().

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