b66c1a3919
This introduces a few changes in the way that the I/O routines are defined on SH, specifically so that things like the iomap API properly wrap through the machvec for board-specific quirks. In addition to this, the old p3_ioremap() work is converted to a more generic __ioremap() that will map through the PMB if it's available, or fall back on page tables for everything else. An alpha-like IO_CONCAT is also added so we can start to clean up the board-specific io.h mess, which will be handled in board update patches.. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
/*
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* linux/arch/sh/kernel/io.c
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*
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* Copyright (C) 2000 Stuart Menefy
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* Copyright (C) 2005 Paul Mundt
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*
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* Provide real functions which expand to whatever the header file defined.
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* Also definitions of machine independent IO functions.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/module.h>
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#include <asm/machvec.h>
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#include <asm/io.h>
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/*
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* Copy data from IO memory space to "real" memory space.
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* This needs to be optimized.
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*/
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void memcpy_fromio(void *to, volatile void __iomem *from, unsigned long count)
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{
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char *p = to;
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while (count) {
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count--;
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*p = readb((void __iomem *)from);
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p++;
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from++;
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}
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}
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EXPORT_SYMBOL(memcpy_fromio);
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/*
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* Copy data from "real" memory space to IO memory space.
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* This needs to be optimized.
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*/
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void memcpy_toio(volatile void __iomem *to, const void *from, unsigned long count)
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{
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const char *p = from;
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while (count) {
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count--;
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writeb(*p, (void __iomem *)to);
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p++;
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to++;
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}
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}
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EXPORT_SYMBOL(memcpy_toio);
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/*
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* "memset" on IO memory space.
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* This needs to be optimized.
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*/
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void memset_io(volatile void __iomem *dst, int c, unsigned long count)
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{
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while (count) {
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count--;
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writeb(c, (void __iomem *)dst);
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dst++;
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}
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}
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EXPORT_SYMBOL(memset_io);
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void __iomem *ioport_map(unsigned long port, unsigned int nr)
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{
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return sh_mv.mv_ioport_map(port, nr);
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}
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EXPORT_SYMBOL(ioport_map);
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void ioport_unmap(void __iomem *addr)
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{
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sh_mv.mv_ioport_unmap(addr);
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}
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EXPORT_SYMBOL(ioport_unmap);
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