LXR linux/arch/mips/mti-malta/malta-memory.c

   1/*
   2 * This file is subject to the terms and conditions of the GNU General Public
   3 * License.  See the file "COPYING" in the main directory of this archive
   4 * for more details.
   5 *
   6 * PROM library functions for acquiring/using memory descriptors given to
   7 * us from the YAMON.
   8 *
   9 * Copyright (C) 1999,2000,2012  MIPS Technologies, Inc.
  10 * All rights reserved.
  11 * Authors: Carsten Langgaard <carstenl@mips.com>
  12 *          Steven J. Hill <sjhill@mips.com>
  13 */
  14#include <linux/init.h>
  15#include <linux/bootmem.h>
  16#include <linux/string.h>
  17
  18#include <asm/bootinfo.h>
  19#include <asm/cdmm.h>
  20#include <asm/maar.h>
  21#include <asm/sections.h>
  22#include <asm/fw/fw.h>
  23
  24/* determined physical memory size, not overridden by command line args  */
  25unsigned long physical_memsize = 0L;
  26
  27static void free_init_pages_eva_malta(void *begin, void *end)
  28{
  29        free_init_pages("unused kernel", __pa_symbol((unsigned long *)begin),
  30                        __pa_symbol((unsigned long *)end));
  31}
  32
  33void __init fw_meminit(void)
  34{
  35        bool eva = config_enabled(CONFIG_EVA);
  36
  37        free_init_pages_eva = eva ? free_init_pages_eva_malta : NULL;
  38}
  39
  40void __init prom_free_prom_memory(void)
  41{
  42        unsigned long addr;
  43        int i;
  44
  45        for (i = 0; i < boot_mem_map.nr_map; i++) {
  46                if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA)
  47                        continue;
  48
  49                addr = boot_mem_map.map[i].addr;
  50                free_init_pages("YAMON memory",
  51                                addr, addr + boot_mem_map.map[i].size);
  52        }
  53}
  54
  55phys_addr_t mips_cdmm_phys_base(void)
  56{
  57        /* This address is "typically unused" */
  58        return 0x1fc10000;
  59}
  60