#ifndef _M68K_CACHEFLUSH_H #define _M68K_CACHEFLUSH_H #include <linux/mm.h> /* cache code */ #define FLUSH_I_AND_D (0x00000808) #define FLUSH_I (0x00000008) /* * Cache handling functions */ static inline void flush_icache(void) { if (CPU_IS_040_OR_060) asm volatile ( "nop\n" " .chip 68040\n" " cpusha %bc\n" " .chip 68k"); else { unsigned long tmp; asm volatile ( "movec %%cacr,%0\n" " or.w %1,%0\n" " movec %0,%%cacr" : "=&d" (tmp) : "id" (FLUSH_I)); } } /* * invalidate the cache for the specified memory range. * It starts at the physical address specified for * the given number of bytes. */ extern void cache_clear(unsigned long paddr, int len); /* * push any dirty cache in the specified memory range. * It starts at the physical address specified for * the given number of bytes. */ extern void cache_push(unsigned long paddr, int len); /* * push and invalidate pages in the specified user virtual * memory range. */ extern void cache_push_v(unsigned long vaddr, int len); /* This is needed whenever the virtual mapping of the current process changes. */ #define __flush_cache_all() \ ({ \ if (CPU_IS_040_OR_060) \ __asm__ __volatile__("nop\n\t" \ ".chip 68040\n\t" \ "cpusha %dc\n\t" \ ".chip 68k"); \ else { \ unsigned long _tmp; \ __asm__ __volatile__("movec %%cacr,%0\n\t" \ "orw %1,%0\n\t" \ "movec %0,%%cacr" \ : "=&d" (_tmp) \ : "di" (FLUSH_I_AND_D)); \ } \ }) #define __flush_cache_030() \ ({ \ if (CPU_IS_020_OR_030) { \ unsigned long _tmp; \ __asm__ __volatile__("movec %%cacr,%0\n\t" \ "orw %1,%0\n\t" \ "movec %0,%%cacr" \ : "=&d" (_tmp) \ : "di" (FLUSH_I_AND_D)); \ } \ }) #define flush_cache_all() __flush_cache_all() #define flush_cache_vmap(start, end) flush_cache_all() #define flush_cache_vunmap(start, end) flush_cache_all() static inline void flush_cache_mm(struct mm_struct *mm) { if (mm == current->mm) __flush_cache_030(); } /* flush_cache_range/flush_cache_page must be macros to avoid a dependency on linux/mm.h, which includes this file... */ static inline void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) { if (vma->vm_mm == current->mm) __flush_cache_030(); } static inline void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn) { if (vma->vm_mm == current->mm) __flush_cache_030(); } /* Push the page at kernel virtual address and clear the icache */ /* RZ: use cpush %bc instead of cpush %dc, cinv %ic */ static inline void __flush_page_to_ram(void *vaddr) { if (CPU_IS_040_OR_060) { __asm__ __volatile__("nop\n\t" ".chip 68040\n\t" "cpushp %%bc,(%0)\n\t" ".chip 68k" : : "a" (__pa(vaddr))); } else { unsigned long _tmp; __asm__ __volatile__("movec %%cacr,%0\n\t" "orw %1,%0\n\t" "movec %0,%%cacr" : "=&d" (_tmp) : "di" (FLUSH_I)); } } #define flush_dcache_page(page) __flush_page_to_ram(page_address(page)) #define flush_dcache_mmap_lock(mapping) do { } while (0) #define flush_dcache_mmap_unlock(mapping) do { } while (0) #define flush_icache_page(vma, page) __flush_page_to_ram(page_address(page)) extern void flush_icache_user_range(struct vm_area_struct *vma, struct page *page, unsigned long addr, int len); extern void flush_icache_range(unsigned long address, unsigned long endaddr); static inline void copy_to_user_page(struct vm_area_struct *vma, struct page *page, unsigned long vaddr, void *dst, void *src, int len) { flush_cache_page(vma, vaddr, page_to_pfn(page)); memcpy(dst, src, len); flush_icache_user_range(vma, page, vaddr, len); } static inline void copy_from_user_page(struct vm_area_struct *vma, struct page *page, unsigned long vaddr, void *dst, void *src, int len) { flush_cache_page(vma, vaddr, page_to_pfn(page)); memcpy(dst, src, len); } #endif /* _M68K_CACHEFLUSH_H */