| #ifndef __VIRT_CONVERT__ |
| #define __VIRT_CONVERT__ |
| |
| /* |
| * Macros used for converting between virtual and physical mappings. |
| */ |
| |
| #ifdef __KERNEL__ |
| |
| #include <linux/config.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_vtop_fallback (unsigned long) __attribute__ ((const)); |
| extern unsigned long mm_ptov(unsigned long addr) __attribute__ ((const)); |
| #else |
| extern inline unsigned long mm_vtop(unsigned long vaddr) |
| { |
| return __pa(vaddr); |
| } |
| |
| extern inline unsigned long mm_ptov(unsigned long paddr) |
| { |
| return (unsigned long)__va(paddr); |
| } |
| #endif |
| |
| #ifdef CONFIG_SINGLE_MEMORY_CHUNK |
| extern inline unsigned long virt_to_phys(volatile void *vaddr) |
| { |
| unsigned long voff = (unsigned long)vaddr - PAGE_OFFSET; |
| |
| if (voff < m68k_memory[0].size) |
| return voff + m68k_memory[0].addr; |
| return mm_vtop_fallback((unsigned long)vaddr); |
| } |
| |
| extern inline void * phys_to_virt(unsigned long paddr) |
| { |
| unsigned long poff = paddr - m68k_memory[0].addr; |
| |
| if (poff < m68k_memory[0].size) |
| return (void *)(poff + PAGE_OFFSET); |
| |
| #ifdef CONFIG_AMIGA |
| /* |
| * if on an amiga and address is in first 16M, move it |
| * to the ZTWO_VADDR range |
| */ |
| if (MACH_IS_AMIGA && paddr < 16*1024*1024) |
| return (void *)ZTWO_VADDR(paddr); |
| #endif |
| return (void *)paddr; |
| } |
| #else |
| extern inline unsigned long virt_to_phys(volatile void * address) |
| { |
| return mm_vtop((unsigned long)address); |
| } |
| |
| extern inline void * phys_to_virt(unsigned long address) |
| { |
| return (void *) mm_ptov(address); |
| } |
| #endif |
| |
| /* |
| * 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 |