android_kernel_xiaomi_sm8350/arch/sh/kernel/io.c
Paul Mundt 0bb34a6bf1 sh: pci: Consolidate pci_iomap() and use the generic I/O base.
This consolidates the pci_iomap() definitions and reworks how the I/O
port base is handled. PCI channels can register their own I/O map base,
or if none is provided, the system-wide generic I/O base is used instead.

Functionally nothing changes, while this allows us to kill off lots of
I/O address special casing and lookups.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-04-20 16:38:00 +09:00

82 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 <linux/pci.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);