77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
#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
|