arch/mips/emma/common/prom.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (C) NEC Electronics Corporation 2004-2006
   4  *
   5  *  This file is based on the arch/mips/ddb5xxx/common/prom.c
   6  *
   7  *      Copyright 2001 MontaVista Software Inc.
   8  */
   9 #include <linux/init.h>
  10 #include <linux/mm.h>
  11 #include <linux/sched.h>
  12 #include <linux/memblock.h>
  13
  14 #include <asm/addrspace.h>
  15 #include <asm/bootinfo.h>
  16 #include <asm/emma/emma2rh.h>
  17
  18 const char *get_system_type(void)
  19 {
  20 #ifdef CONFIG_NEC_MARKEINS
  21         return "NEC EMMA2RH Mark-eins";
  22 #else
  23 #error  Unknown NEC board
  24 #endif
  25 }
  26
  27 /* [jsun@junsun.net] PMON passes arguments in C main() style */
  28 void __init prom_init(void)
  29 {
  30         int argc = fw_arg0;
  31         char **arg = (char **)fw_arg1;
  32         int i;
  33
  34         /* if user passes kernel args, ignore the default one */
  35         if (argc > 1)
  36                 arcs_cmdline[0] = '\0';
  37
  38         /* arg[0] is "g", the rest is boot parameters */
  39         for (i = 1; i < argc; i++) {
  40                 if (strlen(arcs_cmdline) + strlen(arg[i]) + 1
  41                     >= sizeof(arcs_cmdline))
  42                         break;
  43                 strcat(arcs_cmdline, arg[i]);
  44                 strcat(arcs_cmdline, " ");
  45         }
  46
  47 #ifdef CONFIG_NEC_MARKEINS
  48         add_memory_region(0, EMMA2RH_RAM_SIZE, BOOT_MEM_RAM);
  49 #else
  50 #error  Unknown NEC board
  51 #endif
  52 }
  53
  54 void __init prom_free_prom_memory(void)
  55 {
  56 }