i386/libsaio/memory.c

   1 /*
   2  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Portions Copyright (c) 2003 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.2 (the "License").  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License.
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24
  25 #include "sl.h"
  26 #include "saio_internal.h"
  27 #include "bootstruct.h"
  28
  29 static long  gImageLastKernelAddr;
  30
  31 #define kPageSize     4096
  32 #define RoundPage(x)  ((((unsigned)(x)) + kPageSize - 1) & ~(kPageSize - 1))
  33
  34
  35 long
  36 AllocateMemoryRange(char * rangeName, long start, long length, long type)
  37 {
  38     if ( bootArgs->numBootDrivers < NDRIVERS )
  39     {
  40         int num = bootArgs->numBootDrivers;
  41
  42         bootArgs->driverConfig[num].address = start;
  43         bootArgs->driverConfig[num].size    = length;
  44         bootArgs->driverConfig[num].type    = type;
  45         bootArgs->numBootDrivers++;
  46     }
  47     else
  48     {
  49         stop( "AllocateMemoryRange error" );
  50     }
  51     return 0;
  52 }
  53
  54 long
  55 AllocateKernelMemory( long inSize )
  56 {
  57     long addr;
  58
  59     if (gImageLastKernelAddr == 0) {
  60         gImageLastKernelAddr = RoundPage( bootArgs->kaddr +
  61                                           bootArgs->ksize );
  62     }
  63     addr = gImageLastKernelAddr;
  64     gImageLastKernelAddr += RoundPage(inSize);
  65
  66     if ( gImageLastKernelAddr >= (KERNEL_ADDR + KERNEL_LEN) ) {
  67         stop ("AllocateKernelMemory error");
  68     }
  69
  70     bootArgs->ksize = gImageLastKernelAddr - bootArgs->kaddr;
  71
  72     return addr;
  73 }