arch/xtensa/mm/ioremap.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * ioremap implementation.
   4  *
   5  * Copyright (C) 2015 Cadence Design Systems Inc.
   6  */
   7
   8 #include <linux/io.h>
   9 #include <linux/pgtable.h>
  10 #include <asm/cacheflush.h>
  11 #include <asm/io.h>
  12
  13 void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
  14                            unsigned long prot)
  15 {
  16         unsigned long pfn = __phys_to_pfn((phys_addr));
  17         WARN_ON(pfn_valid(pfn));
  18
  19         return generic_ioremap_prot(phys_addr, size, __pgprot(prot));
  20 }
  21 EXPORT_SYMBOL(ioremap_prot);
  22
  23 void iounmap(volatile void __iomem *addr)
  24 {
  25         unsigned long va = (unsigned long) addr;
  26
  27         if ((va >= XCHAL_KIO_CACHED_VADDR &&
  28               va - XCHAL_KIO_CACHED_VADDR < XCHAL_KIO_SIZE) ||
  29             (va >= XCHAL_KIO_BYPASS_VADDR &&
  30               va - XCHAL_KIO_BYPASS_VADDR < XCHAL_KIO_SIZE))
  31                 return;
  32
  33         generic_iounmap(addr);
  34 }
  35 EXPORT_SYMBOL(iounmap);