From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/asm-m68k/cacheflush.h | 149 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 149 insertions(+) create mode 100644 include/asm-m68k/cacheflush.h (limited to 'include/asm-m68k/cacheflush.h') diff --git a/include/asm-m68k/cacheflush.h b/include/asm-m68k/cacheflush.h new file mode 100644 index 00000000000..e4773946f10 --- /dev/null +++ b/include/asm-m68k/cacheflush.h @@ -0,0 +1,149 @@ +#ifndef _M68K_CACHEFLUSH_H +#define _M68K_CACHEFLUSH_H + +#include + +/* + * Cache handling functions + */ + +#define flush_icache() \ +({ \ + if (CPU_IS_040_OR_060) \ + __asm__ __volatile__("nop\n\t" \ + ".chip 68040\n\t" \ + "cinva %%ic\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) \ + : "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); + +/* cache code */ +#define FLUSH_I_AND_D (0x00000808) +#define FLUSH_I (0x00000008) + +/* 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)) +#define flush_icache_user_range(vma,pg,adr,len) do { } while (0) + +#define copy_to_user_page(vma, page, vaddr, dst, src, len) \ + do { \ + flush_cache_page(vma, vaddr, page_to_pfn(page));\ + memcpy(dst, src, len); \ + } while (0) + +#define copy_from_user_page(vma, page, vaddr, dst, src, len) \ + do { \ + flush_cache_page(vma, vaddr, page_to_pfn(page));\ + memcpy(dst, src, len); \ + } while (0) + +extern void flush_icache_range(unsigned long address, unsigned long endaddr); + +#endif /* _M68K_CACHEFLUSH_H */ -- cgit v1.2.3