include/generic/physmem_nommu.h File Reference

Physical memory definitions for processors without MMU. More...

#include <stdint.h>

Go to the source code of this file.

Defines
#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, phys_size_t size)
	Unmap a virtual-to-physical mapping.

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Detailed Description

Physical memory definitions for processors without MMU.

This file is intended to be included from cpu/physmem.h on processors without a Memory Management Unit (MMU). Do not include this file directly!

See also:

physmem.h

Copyright (C) 2009 Atmel Corporation. All rights reserved.

Definition in file physmem_nommu.h.

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Define Documentation

#define PHYS_MAP_COHERENT   (0)

Create a coherent (uncached) mapping.

Definition at line 50 of file physmem_nommu.h.

#define PHYS_MAP_WRBACK   (0)

Write-back caching is allowed.

Definition at line 56 of file physmem_nommu.h.

Referenced by malloc(), and membag_pool_init_physmem().

#define PHYS_MAP_WRBUF   (0)

Write-buffering is allowed.

Definition at line 52 of file physmem_nommu.h.

Referenced by malloc(), and membag_pool_init_physmem().

#define PHYS_MAP_WRTHROUGH   (0)

Write-through caching is allowed.

Definition at line 54 of file physmem_nommu.h.

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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 71 of file physmem_nommu.h.

Referenced by malloc(), and membag_pool_init_physmem().

static void physmem_unmap	(	void *	vaddr,
		phys_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 86 of file physmem_nommu.h.