FreeBSD/Linux Kernel Cross Reference
sys/compat/linuxkpi/common/include/asm/set_memory.h

     /*-
      * Copyright (c) 2010 Isilon Systems, Inc.
      * Copyright (c) 2016 Matt Macy (mmacy@nextbsd.org)
      * Copyright (c) 2017 Mellanox Technologies, Ltd.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice unmodified, this list of conditions, and the following
     *    disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     */
    
    #ifndef _LINUXKPI_ASM_SET_MEMORY_H_
    #define _LINUXKPI_ASM_SET_MEMORY_H_
    
    #include <linux/page.h>
    
    static inline int
    set_memory_uc(unsigned long addr, int numpages)
    {
            return (pmap_change_attr(addr, numpages, VM_MEMATTR_UNCACHEABLE));
    }
    
    static inline int
    set_memory_wc(unsigned long addr, int numpages)
    {
    #ifdef VM_MEMATTR_WRITE_COMBINING
            return (pmap_change_attr(addr, numpages, VM_MEMATTR_WRITE_COMBINING));
    #else
            return (set_memory_uc(addr, numpages));
    #endif
    }
    
    static inline int
    set_memory_wb(unsigned long addr, int numpages)
    {
            return (pmap_change_attr(addr, numpages, VM_MEMATTR_WRITE_BACK));
    }
    
    static inline int
    set_pages_uc(vm_page_t page, int numpages)
    {
            KASSERT(numpages == 1, ("%s: numpages %d", __func__, numpages));
    
            pmap_page_set_memattr(page, VM_MEMATTR_UNCACHEABLE);
            return (0);
    }
    
    static inline int
    set_pages_wc(vm_page_t page, int numpages)
    {
            KASSERT(numpages == 1, ("%s: numpages %d", __func__, numpages));
    
    #ifdef VM_MEMATTR_WRITE_COMBINING
            pmap_page_set_memattr(page, VM_MEMATTR_WRITE_COMBINING);
    #else
            return (set_pages_uc(page, numpages));
    #endif
            return (0);
    }
    
    static inline int
    set_pages_wb(vm_page_t page, int numpages)
    {
            KASSERT(numpages == 1, ("%s: numpages %d", __func__, numpages));
    
            pmap_page_set_memattr(page, VM_MEMATTR_WRITE_BACK);
            return (0);
    }
    
    static inline int
    set_pages_array_wb(vm_page_t *pages, int addrinarray)
    {
            int i;
    
            for (i = 0; i < addrinarray; i++)
                    set_pages_wb(pages[i], 1);
            return (0);
    }
    
    static inline int
    set_pages_array_wc(vm_page_t *pages, int addrinarray)
    {
           int i;
   
           for (i = 0; i < addrinarray; i++)
                   set_pages_wc(pages[i], 1);
           return (0);
   }
   
   static inline int
   set_pages_array_uc(vm_page_t *pages, int addrinarray)
   {
           int i;
   
           for (i = 0; i < addrinarray; i++)
                   set_pages_uc(pages[i], 1);
           return (0);
   }
   
   #endif  /* _LINUXKPI_ASM_SET_MEMORY_H_ */

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