cpu/uc3/include/cpu/physmem.h File Reference

UC3-specific physical memory definitions. More...

#include <types.h>

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Defines
#define	PHYSMEM_ALLOC_ERR   ((phys_addr_t)(-1))
	Return value indicating physical memory allocation failure.
#define	PHYS_MAP_COHERENT   (0)
	Create a coherent (uncached) mapping.
#define	PHYS_MAP_WRBUF   (0)
	Write-buffering is allowed.
#define	PHYS_MAP_WRTHROUGH   (0)
	Write-through caching is allowed.
#define	PHYS_MAP_WRBACK   (0)
	Write-back caching is allowed.
Functions
static void *	physmem_map (phys_addr_t phys, phys_size_t size, unsigned long flags)
	Map a physical address to a virtual address.
static void	physmem_unmap (void *vaddr, size_t size)
	Unmap a virtual-to-physical mapping.

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Detailed Description

UC3-specific physical memory definitions.

See also:

physmem.h

• Compiler: IAR EWAVR32 and GNU GCC for AVR32
• Supported devices: All AVR32 UC3 devices
• AppNote:

Author:

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

Definition in file physmem.h.

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Define Documentation

#define PHYS_MAP_COHERENT   (0)

Create a coherent (uncached) mapping.

Definition at line 52 of file physmem.h.

#define PHYS_MAP_WRBACK   (0)

Write-back caching is allowed.

Definition at line 58 of file physmem.h.

Referenced by mem_pool_init_physmem().

#define PHYS_MAP_WRBUF   (0)

Write-buffering is allowed.

Definition at line 54 of file physmem.h.

Referenced by mem_pool_init_physmem().

#define PHYS_MAP_WRTHROUGH   (0)

Write-through caching is allowed.

Definition at line 56 of file physmem.h.

#define PHYSMEM_ALLOC_ERR   ((phys_addr_t)(-1))

Return value indicating physical memory allocation failure.

Definition at line 49 of file physmem.h.

Referenced by dma_pool_init_coherent_physmem(), mem_pool_init_physmem(), physmem_alloc(), and physmem_alloc_low().

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Function Documentation

static void* physmem_map	(	phys_addr_t	phys,
		phys_size_t	size,
		unsigned long	flags
	)			[inline, static]

Map a physical address to a virtual address.

This function returns a valid virtual address which can be used to access a given physical memory area with given access and caching properties.

Parameters:

	phys	A valid physical address.
	size	The size of the physical region to be mapped.
	flags	Flags specifying cache behaviour, etc.

Returns:

A virtual address which can be used to access phys.

Definition at line 73 of file physmem.h.

Referenced by mem_pool_init_physmem().

static void physmem_unmap	(	void *	vaddr,
		size_t	size
	)			[inline, static]

Unmap a virtual-to-physical mapping.

This function cleans up any mappings set up by physmem_map(). It must be called when the virtual mapping isn't needed anymore.

Parameters:

	vaddr	A valid virtual address returned by physmem_map().
	size	The size of the mapped region.

Definition at line 88 of file physmem.h.