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include/asm-m68k/virtconvert.h
1.73 KB
1da177e4c
Linux-2.6.12-rc2
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#ifndef __VIRT_CONVERT__
#define __VIRT_CONVERT__
/*
* Macros used for converting between virtual and physical mappings.
*/
#ifdef __KERNEL__
#include <linux/config.h>
#include <linux/compiler.h>
#include <asm/setup.h>
#include <asm/page.h>
#ifdef CONFIG_AMIGA
#include <asm/amigahw.h>
#endif
/*
* Change virtual addresses to physical addresses and vv.
*/
#ifndef CONFIG_SUN3
extern unsigned long mm_vtop(unsigned long addr) __attribute_const__;
extern unsigned long mm_ptov(unsigned long addr) __attribute_const__;
#else
static inline unsigned long mm_vtop(unsigned long vaddr)
{
return __pa(vaddr);
}
static inline unsigned long mm_ptov(unsigned long paddr)
{
return (unsigned long)__va(paddr);
}
#endif
#ifdef CONFIG_SINGLE_MEMORY_CHUNK
static inline unsigned long virt_to_phys(void *vaddr)
{
return (unsigned long)vaddr - PAGE_OFFSET + m68k_memory[0].addr;
}
static inline void * phys_to_virt(unsigned long paddr)
{
return (void *)(paddr - m68k_memory[0].addr + PAGE_OFFSET);
}
#else
static inline unsigned long virt_to_phys(void *address)
{
return mm_vtop((unsigned long)address);
}
static inline void *phys_to_virt(unsigned long address)
{
return (void *) mm_ptov(address);
}
#endif
/* Permanent address of a page. */
#define __page_address(page) (PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT))
#define page_to_phys(page) virt_to_phys((void *)__page_address(page))
/*
* IO bus memory addresses are 1:1 with the physical address,
* except on the PCI bus of the Hades.
*/
#ifdef CONFIG_HADES
#define virt_to_bus(a) (virt_to_phys(a) + (MACH_IS_HADES ? 0x80000000 : 0))
#define bus_to_virt(a) (phys_to_virt((a) - (MACH_IS_HADES ? 0x80000000 : 0)))
#else
#define virt_to_bus virt_to_phys
#define bus_to_virt phys_to_virt
#endif
#endif
#endif
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