diff options
Diffstat (limited to 'target/linux/coldfire/files-2.6.31/arch/m68k/include/asm/cf_virtconvert.h')
| -rw-r--r-- | target/linux/coldfire/files-2.6.31/arch/m68k/include/asm/cf_virtconvert.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/target/linux/coldfire/files-2.6.31/arch/m68k/include/asm/cf_virtconvert.h b/target/linux/coldfire/files-2.6.31/arch/m68k/include/asm/cf_virtconvert.h new file mode 100644 index 0000000000..ed95887da2 --- /dev/null +++ b/target/linux/coldfire/files-2.6.31/arch/m68k/include/asm/cf_virtconvert.h @@ -0,0 +1,58 @@ +/* + * 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__ */ |