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/*
* Copyright 2007-2009 Freescale Semiconductor, Inc. All Rights Reserved.
*/
#ifndef __CF_VIRTCONVERT__
#define __CF_VIRTCONVERT__
/*
* Macros used for converting between virtual and physical mappings.
*
* Coldfire Specific
*/
#ifdef __KERNEL__
#include <linux/compiler.h>
#include <linux/mmzone.h>
#include <asm/setup.h>
#include <asm/page.h>
/*
* Change virtual addresses to physical addresses and vv.
*/
static inline unsigned long virt_to_phys(void *address)
{
return __pa(address);
}
static inline void *phys_to_virt(unsigned long address)
{
return __va(address);
}
/* Permanent address of a page. */
#ifdef CONFIG_SINGLE_MEMORY_CHUNK
#define page_to_phys(page) \
__pa(PAGE_OFFSET + (((page) - pg_data_map[0].node_mem_map) << PAGE_SHIFT))
#else
#define page_to_phys(_page) ({ \
struct page *__page = _page; \
struct pglist_data *pgdat; \
pgdat = pg_data_table[page_to_nid(__page)]; \
page_to_pfn(__page) << PAGE_SHIFT; \
})
#endif
/*
* IO bus memory addresses are 1:1 with the physical address,
*/
#ifdef CONFIG_PCI
#define virt_to_bus(a) (a + PCI_DMA_BASE)
#define bus_to_virt(a) (a - PCI_DMA_BASE)
#else
#define virt_to_bus(a) (a)
#define bus_to_virt(a) (a)
#endif
#endif /* __KERNEL__ */
#endif /* __CF_VIRTCONVERT__ */
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