forked from luck/tmp_suning_uos_patched
14866543ad
This tidies up a lot of the PIO/MMIO split. No in-tree platforms were making use of the MMIO overloading through the machvec (nor have any of them been in some time), so we just kill all of that off. The ISA I/O routine wrapping remains unaffected, which remains the only special casing outside of the iomap API that boards need to think about. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
81 lines
1.8 KiB
C
81 lines
1.8 KiB
C
/*
|
|
* linux/arch/sh/kernel/io.c
|
|
*
|
|
* Copyright (C) 2000 Stuart Menefy
|
|
* Copyright (C) 2005 Paul Mundt
|
|
*
|
|
* Provide real functions which expand to whatever the header file defined.
|
|
* Also definitions of machine independent IO functions.
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <asm/machvec.h>
|
|
#include <asm/io.h>
|
|
|
|
/*
|
|
* Copy data from IO memory space to "real" memory space.
|
|
* This needs to be optimized.
|
|
*/
|
|
void memcpy_fromio(void *to, const volatile void __iomem *from, unsigned long count)
|
|
{
|
|
unsigned char *p = to;
|
|
while (count) {
|
|
count--;
|
|
*p = readb(from);
|
|
p++;
|
|
from++;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(memcpy_fromio);
|
|
|
|
/*
|
|
* Copy data from "real" memory space to IO memory space.
|
|
* This needs to be optimized.
|
|
*/
|
|
void memcpy_toio(volatile void __iomem *to, const void *from, unsigned long count)
|
|
{
|
|
const unsigned char *p = from;
|
|
while (count) {
|
|
count--;
|
|
writeb(*p, to);
|
|
p++;
|
|
to++;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(memcpy_toio);
|
|
|
|
/*
|
|
* "memset" on IO memory space.
|
|
* This needs to be optimized.
|
|
*/
|
|
void memset_io(volatile void __iomem *dst, int c, unsigned long count)
|
|
{
|
|
while (count) {
|
|
count--;
|
|
writeb(c, dst);
|
|
dst++;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(memset_io);
|
|
|
|
void __iomem *ioport_map(unsigned long port, unsigned int nr)
|
|
{
|
|
void __iomem *ret;
|
|
|
|
ret = __ioport_map_trapped(port, nr);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return __ioport_map(port, nr);
|
|
}
|
|
EXPORT_SYMBOL(ioport_map);
|
|
|
|
void ioport_unmap(void __iomem *addr)
|
|
{
|
|
sh_mv.mv_ioport_unmap(addr);
|
|
}
|
|
EXPORT_SYMBOL(ioport_unmap);
|