arch/x86/mm/numa_32.c

   1 /*
   2  * Written by: Patricia Gaughen <gone@us.ibm.com>, IBM Corporation
   3  * August 2002: added remote node KVA remap - Martin J. Bligh
   4  *
   5  * Copyright (C) 2002, IBM Corp.
   6  *
   7  * All rights reserved.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  17  * NON INFRINGEMENT.  See the GNU General Public License for more
  18  * details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23  */
  24
  25 #include <linux/memblock.h>
  26 #include <linux/init.h>
  27
  28 #include "numa_internal.h"
  29
  30 extern unsigned long highend_pfn, highstart_pfn;
  31
  32 void __init initmem_init(void)
  33 {
  34         x86_numa_init();
  35
  36 #ifdef CONFIG_HIGHMEM
  37         highstart_pfn = highend_pfn = max_pfn;
  38         if (max_pfn > max_low_pfn)
  39                 highstart_pfn = max_low_pfn;
  40         printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
  41                pages_to_mb(highend_pfn - highstart_pfn));
  42         high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
  43 #else
  44         high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
  45 #endif
  46         printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
  47                         pages_to_mb(max_low_pfn));
  48         printk(KERN_DEBUG "max_low_pfn = %lx, highstart_pfn = %lx\n",
  49                         max_low_pfn, highstart_pfn);
  50
  51         printk(KERN_DEBUG "Low memory ends at vaddr %08lx\n",
  52                         (ulong) pfn_to_kaddr(max_low_pfn));
  53
  54         printk(KERN_DEBUG "High memory starts at vaddr %08lx\n",
  55                         (ulong) pfn_to_kaddr(highstart_pfn));
  56
  57         __vmalloc_start_set = true;
  58         setup_bootmem_allocator();
  59 }