void invalidate_dcache_region(void *start, size_t size)
{
- unsigned long v, begin, end, linesz;
+ unsigned long v, begin, end, linesz, mask;
linesz = boot_cpu_data.dcache.linesz;
+ mask = linesz - 1;
- //printk("invalidate dcache: %p + %u\n", start, size);
+ /* when first and/or last cachelines are shared, flush them
+ * instead of invalidating ... never discard valid data!
+ */
+ begin = (unsigned long)start;
+ end = begin + size;
- /* You asked for it, you got it */
- begin = (unsigned long)start & ~(linesz - 1);
- end = ((unsigned long)start + size + linesz - 1) & ~(linesz - 1);
+ if (begin & mask) {
+ flush_dcache_line(start);
+ begin += linesz;
+ }
+ if (end & mask) {
+ flush_dcache_line((void *)end);
+ end &= ~mask;
+ }
+ /* remaining cachelines only need invalidation */
for (v = begin; v < end; v += linesz)
invalidate_dcache_line((void *)v);
+ flush_write_buffer();
}
void clean_dcache_region(void *start, size_t size)
void flush_icache_page(struct vm_area_struct *vma, struct page *page)
{
if (vma->vm_flags & VM_EXEC) {
- void *v = kmap(page);
+ void *v = page_address(page);
__flush_icache_range((unsigned long)v, (unsigned long)v + PAGE_SIZE);
- kunmap(v);
}
}
-/*
- * 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);
+}