void invalidate_dcache_region(void *start, size_t size)
{
unsigned long v, begin, end, linesz, mask;
- int flush = 0;
linesz = boot_cpu_data.dcache.linesz;
mask = linesz - 1;
* instead of invalidating ... never discard valid data!
*/
begin = (unsigned long)start;
- end = begin + size - 1;
+ end = begin + size;
if (begin & mask) {
flush_dcache_line(start);
begin += linesz;
- flush = 1;
}
- if ((end & mask) != mask) {
+ if (end & mask) {
flush_dcache_line((void *)end);
- end -= linesz;
- flush = 1;
+ end &= ~mask;
}
/* remaining cachelines only need invalidation */
- for (v = begin; v <= end; v += linesz)
+ for (v = begin; v < end; v += linesz)
invalidate_dcache_line((void *)v);
- if (flush)
- flush_write_buffer();
+ flush_write_buffer();
}
void clean_dcache_region(void *start, size_t size)
}
}
-/*
- * This one is used by copy_to_user_page()
- */
-void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
- unsigned long addr, int len)
-{
- if (vma->vm_flags & VM_EXEC)
- flush_icache_range(addr, addr + len);
-}
-
asmlinkage int sys_cacheflush(int operation, void __user *addr, size_t len)
{
int ret;
out:
return ret;
}
+
+void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
+ unsigned long vaddr, void *dst, const void *src,
+ unsigned long len)
+{
+ memcpy(dst, src, len);
+ if (vma->vm_flags & VM_EXEC)
+ flush_icache_range((unsigned long)dst,
+ (unsigned long)dst + len);
+}