15444a8973
The synopsys PCI cell used in the later STMicro chips requires code to be run in order to do IO cycles, rather than just memory mapping the IO space. Rather than extending the existing SH infrastructure to allow this, use the GENERIC_IOMAP implmentation to save re-inventing the wheel. This set of changes allows the SH to be built with GENERIC_IOMAP enabled, it just ifdef's out the functions provided by the GENERIC_IOMAP implementation, and provides a few required missing functions. Signed-off-by: David McKay <david.mckay@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
86 lines
1.9 KiB
C
86 lines
1.9 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 <linux/pci.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, const volatile void __iomem *from, unsigned long count)
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{
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unsigned char *p = to;
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while (count) {
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count--;
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*p = readb(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 unsigned char *p = from;
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while (count) {
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count--;
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writeb(*p, 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, 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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#ifndef CONFIG_GENERIC_IOMAP
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void __iomem *ioport_map(unsigned long port, unsigned int nr)
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{
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void __iomem *ret;
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ret = __ioport_map_trapped(port, nr);
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if (ret)
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return ret;
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return __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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#endif /* CONFIG_GENERIC_IOMAP */
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