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https://github.com/edk2-porting/linux-next.git
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e1612de9e4
Some power systems do not have legacy ISA devices. So, /dev/port is not a valid interface on these systems. User level tools such as kbdrate is trying to access the device using this interface which is causing the system crash. This patch will fix this issue by not creating this interface on these powerpc systems. Signed-off-by: Haren Myneni <haren@us.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
/*
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* Copyright 2006 PathScale, Inc. All Rights Reserved.
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef _LINUX_IO_H
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#define _LINUX_IO_H
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#include <linux/types.h>
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#include <asm/io.h>
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#include <asm/page.h>
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struct device;
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void __iowrite32_copy(void __iomem *to, const void *from, size_t count);
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void __iowrite64_copy(void __iomem *to, const void *from, size_t count);
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#ifdef CONFIG_MMU
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int ioremap_page_range(unsigned long addr, unsigned long end,
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phys_addr_t phys_addr, pgprot_t prot);
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#else
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static inline int ioremap_page_range(unsigned long addr, unsigned long end,
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phys_addr_t phys_addr, pgprot_t prot)
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{
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return 0;
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}
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#endif
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/*
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* Managed iomap interface
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*/
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#ifdef CONFIG_HAS_IOPORT
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void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
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unsigned int nr);
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void devm_ioport_unmap(struct device *dev, void __iomem *addr);
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#else
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static inline void __iomem *devm_ioport_map(struct device *dev,
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unsigned long port,
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unsigned int nr)
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{
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return NULL;
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}
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static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr)
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{
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}
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#endif
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void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
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unsigned long size);
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void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
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unsigned long size);
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void devm_iounmap(struct device *dev, void __iomem *addr);
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int check_signature(const volatile void __iomem *io_addr,
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const unsigned char *signature, int length);
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void devm_ioremap_release(struct device *dev, void *res);
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/*
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* Some systems do not have legacy ISA devices.
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* /dev/port is not a valid interface on these systems.
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* So for those archs, <asm/io.h> should define the following symbol.
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*/
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#ifndef arch_has_dev_port
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#define arch_has_dev_port() (1)
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#endif
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#endif /* _LINUX_IO_H */
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