usr/src/stand/lib/sa/standalloc.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <sys/types.h>
  30 #include <sys/saio.h>
  31 #include <sys/sysmacros.h>
  32 #include <sys/promif.h>
  33 #include <sys/bootconf.h>
  34 #include <sys/salib.h>
  35
  36 #ifdef DEBUG
  37 static int      resalloc_debug = 1;
  38 #else /* DEBUG */
  39 static int      resalloc_debug = 0;
  40 #endif /* DEBUG */
  41 #define dprintf if (resalloc_debug) printf
  42
  43 extern  caddr_t         resalloc(enum RESOURCES type,
  44                                 size_t bytes, caddr_t virthint, int align);
  45 extern  void            resfree(enum RESOURCES type,
  46                                 caddr_t virtaddr, size_t bytes);
  47
  48 caddr_t         memlistpage;
  49 extern int      pagesize;
  50
  51 /*
  52  *  This routine should be called get_a_page().
  53  *  It allocates from the appropriate entity one or
  54  *  more pages and maps them in.
  55  */
  56
  57 caddr_t
  58 kern_resalloc(caddr_t virthint, size_t size, int align)
  59 {
  60         if (virthint != 0)
  61                 return (resalloc(RES_CHILDVIRT, size, virthint, align));
  62         else {
  63                 return (resalloc(RES_BOOTSCRATCH, size, NULL, NULL));
  64         }
  65 }
  66
  67 /*
  68  * This is called only on sparcv9 for freeing scratch memory.
  69  * The standalone allocator cannot free other types of memory.
  70  */
  71 void
  72 kern_resfree(caddr_t virtaddr, size_t size)
  73 {
  74         resfree(RES_BOOTSCRATCH, virtaddr, size);
  75 }
  76
  77 int
  78 get_progmemory(caddr_t vaddr, size_t size, int align)
  79 {
  80         uintptr_t n;
  81
  82         /*
  83          * if the vaddr given is not a mult of PAGESIZE,
  84          * then we rounddown to a page, but keep the same
  85          * ending addr.
  86          */
  87         n = (uintptr_t)vaddr & (pagesize - 1);
  88         if (n) {
  89                 vaddr -= n;
  90                 size += n;
  91         }
  92
  93         dprintf("get_progmemory: requesting %lx bytes at %p\n", size,
  94             (void *)vaddr);
  95         if (resalloc(RES_CHILDVIRT, size, vaddr, align) != vaddr)
  96                 return (-1);
  97         return (0);
  98 }