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vmalloc.h revision 1.4 
      1 /*	$NetBSD: vmalloc.h,v 1.4 2014/08/23 08:03:33 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _LINUX_VMALLOC_H_
     33 #define _LINUX_VMALLOC_H_
     34 
     35 #include <sys/malloc.h>
     36 
     37 #include <uvm/uvm_extern.h>
     38 
     39 #include <linux/mm_types.h>
     40 
     41 static inline bool
     42 is_vmalloc_addr(void *addr)
     43 {
     44 	/* XXX Assumes vmalloc and kmalloc both use malloc(9).  */
     45 	return true;
     46 }
     47 
     48 static inline void *
     49 vmalloc(unsigned long size)
     50 {
     51 	return malloc(size, M_TEMP, M_WAITOK);
     52 }
     53 
     54 static inline void *
     55 vmalloc_user(unsigned long size)
     56 {
     57 	return malloc(size, M_TEMP, (M_WAITOK | M_ZERO));
     58 }
     59 
     60 static inline void *
     61 vzalloc(unsigned long size)
     62 {
     63 	return malloc(size, M_TEMP, (M_WAITOK | M_ZERO));
     64 }
     65 
     66 static inline void
     67 vfree(void *ptr)
     68 {
     69 	return free(ptr, M_TEMP);
     70 }
     71 
     72 #define	PAGE_KERNEL	0	/* XXX pgprot */
     73 
     74 static inline void *
     75 vmap(struct page **pages, unsigned npages, unsigned long flags __unused,
     76     pgprot_t prot __unused)
     77 {
     78 	vaddr_t va;
     79 
     80 	/* XXX Sleazy cast should be OK here.  */
     81 	__CTASSERT(sizeof(*pages[0]) == sizeof(struct vm_page));
     82 	va = uvm_pagermapin((struct vm_page **)pages, npages, 0);
     83 	if (va == 0)
     84 		return NULL;
     85 
     86 	return (void *)va;
     87 }
     88 
     89 static inline void
     90 vunmap(void *ptr, unsigned npages)
     91 {
     92 
     93 	uvm_pagermapout((vaddr_t)ptr, npages);
     94 }
     95 
     96 #endif  /* _LINUX_VMALLOC_H_ */
     97