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d286a43aa2
To be able to compile e.g. i.MX31 and i.MX51 in a single kernel image
the ioremap quirk needs a runtime check.
While touching this code make the comment more understandable by adding
a sentence from the commit log that introduced it
(eadefef ([ARM] MX3: Use ioremap wrapper to map SoC devices nonshared)).
As mach/io.h now uses cpu_is_ some header reshuffling in mach/hardware.h
was necessary. (mach/mx27.h and mach/mx31.h #include <linux/io.h> which
#includes <mach/io.h>. So mach/mxc.h which provides the cpu_is_ macros
needs to be included before mach/mx27.h and mach/mx31.h.)
LAKML-Reference: 1302464943-20721-5-git-send-email-u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/*
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* Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ASM_ARCH_MXC_IO_H__
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#define __ASM_ARCH_MXC_IO_H__
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/* Allow IO space to be anywhere in the memory */
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#define IO_SPACE_LIMIT 0xffffffff
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#if defined(CONFIG_SOC_IMX31) || defined(CONFIG_SOC_IMX35)
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#include <mach/hardware.h>
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#define __arch_ioremap __imx_ioremap
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#define __arch_iounmap __iounmap
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#define addr_in_module(addr, mod) \
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((unsigned long)(addr) - mod ## _BASE_ADDR < mod ## _SIZE)
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static inline void __iomem *
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__imx_ioremap(unsigned long phys_addr, size_t size, unsigned int mtype)
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{
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if (mtype == MT_DEVICE && (cpu_is_mx31() || cpu_is_mx35())) {
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/*
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* Access all peripherals below 0x80000000 as nonshared device
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* on mx3, but leave l2cc alone. Otherwise cache corruptions
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* can occur.
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*/
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if (phys_addr < 0x80000000 &&
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!addr_in_module(phys_addr, MX3x_L2CC))
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mtype = MT_DEVICE_NONSHARED;
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}
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return __arm_ioremap(phys_addr, size, mtype);
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}
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#endif
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/* io address mapping macro */
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#define __io(a) __typesafe_io(a)
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#define __mem_pci(a) (a)
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#endif
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