d2912cb15b
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* linux/arch/unicore32/include/asm/io.h
|
|
*
|
|
* Code specific to PKUnity SoC and UniCore ISA
|
|
*
|
|
* Copyright (C) 2001-2010 GUAN Xue-tao
|
|
*/
|
|
#ifndef __UNICORE_IO_H__
|
|
#define __UNICORE_IO_H__
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <asm/byteorder.h>
|
|
#include <asm/memory.h>
|
|
|
|
#define PCI_IOBASE PKUNITY_PCILIO_BASE
|
|
#include <asm-generic/io.h>
|
|
|
|
/*
|
|
* __uc32_ioremap and __uc32_ioremap_cached takes CPU physical address.
|
|
*/
|
|
extern void __iomem *__uc32_ioremap(unsigned long, size_t);
|
|
extern void __iomem *__uc32_ioremap_cached(unsigned long, size_t);
|
|
extern void __uc32_iounmap(volatile void __iomem *addr);
|
|
|
|
/*
|
|
* ioremap and friends.
|
|
*
|
|
* ioremap takes a PCI memory address, as specified in
|
|
* Documentation/io-mapping.txt.
|
|
*
|
|
*/
|
|
#define ioremap(cookie, size) __uc32_ioremap(cookie, size)
|
|
#define ioremap_cached(cookie, size) __uc32_ioremap_cached(cookie, size)
|
|
#define ioremap_nocache(cookie, size) __uc32_ioremap(cookie, size)
|
|
#define iounmap(cookie) __uc32_iounmap(cookie)
|
|
|
|
#define readb_relaxed readb
|
|
#define readw_relaxed readw
|
|
#define readl_relaxed readl
|
|
|
|
#define HAVE_ARCH_PIO_SIZE
|
|
#define PIO_OFFSET (unsigned int)(PCI_IOBASE)
|
|
#define PIO_MASK (unsigned int)(IO_SPACE_LIMIT)
|
|
#define PIO_RESERVED (PIO_OFFSET + PIO_MASK + 1)
|
|
|
|
#ifdef CONFIG_STRICT_DEVMEM
|
|
|
|
#include <linux/ioport.h>
|
|
#include <linux/mm.h>
|
|
|
|
/*
|
|
* devmem_is_allowed() checks to see if /dev/mem access to a certain
|
|
* address is valid. The argument is a physical page number.
|
|
* We mimic x86 here by disallowing access to system RAM as well as
|
|
* device-exclusive MMIO regions. This effectively disable read()/write()
|
|
* on /dev/mem.
|
|
*/
|
|
static inline int devmem_is_allowed(unsigned long pfn)
|
|
{
|
|
if (iomem_is_exclusive(pfn << PAGE_SHIFT))
|
|
return 0;
|
|
if (!page_is_ram(pfn))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_STRICT_DEVMEM */
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* __UNICORE_IO_H__ */
|