1 #ifndef __VIRT_CONVERT__
2 #define __VIRT_CONVERT__
5 * Macros used for converting between virtual and physical mappings.
10 #include <linux/config.h>
11 #include <asm/setup.h>
14 #include <asm/amigahw.h>
18 * Change virtual addresses to physical addresses and vv.
20 extern unsigned long mm_vtop(unsigned long addr
) __attribute__ ((const));
21 extern unsigned long mm_vtop_fallback (unsigned long) __attribute__ ((const));
22 extern unsigned long mm_ptov(unsigned long addr
) __attribute__ ((const));
24 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
25 extern inline unsigned long virt_to_phys(volatile void * address
)
27 unsigned long voff
= (unsigned long) address
;
29 if (voff
< m68k_memory
[0].size
)
30 return m68k_memory
[0].addr
+ voff
;
32 return mm_vtop_fallback(voff
);
35 extern inline void * phys_to_virt(unsigned long paddr
)
37 unsigned long base
= m68k_memory
[0].addr
;
39 if ((paddr
>= base
) && (paddr
< (base
+ m68k_memory
[0].size
)))
40 return (void *)(paddr
- base
);
43 * if on an amiga and address is in first 16M, move it
44 * to the ZTWO_VADDR range
46 if (MACH_IS_AMIGA
&& paddr
< 16*1024*1024)
47 return (void *)ZTWO_VADDR(paddr
);
52 extern inline unsigned long virt_to_phys(volatile void * address
)
54 return mm_vtop((unsigned long)address
);
57 extern inline void * phys_to_virt(unsigned long address
)
59 return (void *) mm_ptov(address
);
64 * IO bus memory addresses are 1:1 with the physical address,
65 * except on the PCI bus of the Hades.
68 #define virt_to_bus(a) (virt_to_phys(a) + (MACH_IS_HADES ? 0x80000000 : 0))
69 #define bus_to_virt(a) (phys_to_virt((a) - (MACH_IS_HADES ? 0x80000000 : 0)))
71 #define virt_to_bus virt_to_phys
72 #define bus_to_virt phys_to_virt