forked from Minki/linux
7d3d3254ad
Those files got moved, but cross-references still point to the wrong places. Fixes:fcd6807271("Documentation: Add io-mapping.rst to driver-api manual") Fixes:d1ce350015("Documentation: Add io_ordering.rst to driver-api manual") Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Reviewed-by: Alex Shi <alex.shi@linux.alibaba.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/c0205119db4fef536272cb0a183b6c14c2c8bf4c.1583927470.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* linux/arch/unicore32/include/asm/io.h
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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*/
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#ifndef __UNICORE_IO_H__
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#define __UNICORE_IO_H__
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#ifdef __KERNEL__
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#include <asm/byteorder.h>
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#include <asm/memory.h>
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#define PCI_IOBASE PKUNITY_PCILIO_BASE
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#include <asm-generic/io.h>
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/*
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* __uc32_ioremap takes CPU physical address.
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*/
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extern void __iomem *__uc32_ioremap(unsigned long, size_t);
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extern void __uc32_iounmap(volatile void __iomem *addr);
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/*
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* ioremap and friends.
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*
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* ioremap takes a PCI memory address, as specified in
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* Documentation/driver-api/io-mapping.rst.
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*
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*/
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#define ioremap(cookie, size) __uc32_ioremap(cookie, size)
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#define iounmap(cookie) __uc32_iounmap(cookie)
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#define readb_relaxed readb
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#define readw_relaxed readw
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#define readl_relaxed readl
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#define HAVE_ARCH_PIO_SIZE
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#define PIO_OFFSET (unsigned int)(PCI_IOBASE)
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#define PIO_MASK (unsigned int)(IO_SPACE_LIMIT)
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#define PIO_RESERVED (PIO_OFFSET + PIO_MASK + 1)
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#ifdef CONFIG_STRICT_DEVMEM
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#include <linux/ioport.h>
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#include <linux/mm.h>
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/*
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* devmem_is_allowed() checks to see if /dev/mem access to a certain
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* address is valid. The argument is a physical page number.
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* We mimic x86 here by disallowing access to system RAM as well as
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* device-exclusive MMIO regions. This effectively disable read()/write()
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* on /dev/mem.
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*/
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static inline int devmem_is_allowed(unsigned long pfn)
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{
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if (iomem_is_exclusive(pfn << PAGE_SHIFT))
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return 0;
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if (!page_is_ram(pfn))
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return 1;
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return 0;
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}
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#endif /* CONFIG_STRICT_DEVMEM */
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#endif /* __KERNEL__ */
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#endif /* __UNICORE_IO_H__ */
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