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/memblock.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  */
  25 unsigned long physical_memsize = 0L;
  26
  27 static 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
  33 void __init fw_meminit(void)
  34 {
  35         bool eva = IS_ENABLED(CONFIG_EVA);
  36
  37         free_init_pages_eva = eva ? free_init_pages_eva_malta : NULL;
  38 }
  39
  40 void __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
  55 phys_addr_t mips_cdmm_phys_base(void)
  56 {
  57         /* This address is "typically unused" */
  58         return 0x1fc10000;
  59 }