blob: 66894675f3c8d3ac65c4efdae5039d904110c9b2 [file] [log] [blame]
#include <linux/string.h>
#include <linux/module.h>
#include <linux/io.h>
/* Originally from i386/string.h */
static __always_inline void __iomem_memcpy(void *to, const void *from, size_t n)
unsigned long d0, d1, d2;
asm volatile("rep ; movsl\n\t"
"testb $2,%b4\n\t"
"je 1f\n\t"
"1:\ttestb $1,%b4\n\t"
"je 2f\n\t"
: "=&c" (d0), "=&D" (d1), "=&S" (d2)
: "0" (n / 4), "q" (n), "1" ((long)to), "2" ((long)from)
: "memory");
void memcpy_fromio(void *to, const volatile void __iomem *from, size_t n)
__iomem_memcpy(to, (const void *)from, n);
void memcpy_toio(volatile void __iomem *to, const void *from, size_t n)
__iomem_memcpy((void *)to, (const void *) from, n);
void memset_io(volatile void __iomem *a, int b, size_t c)
* TODO: memset can mangle the IO patterns quite a bit.
* perhaps it would be better to use a dumb one:
memset((void *)a, b, c);