target/linux/ifxmips/files/arch/mips/ifxmips/prom.c

   1 /*
   2  *   arch/mips/ifxmips/prom.c
   3  *
   4  *   This program is free software; you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License as published by
   6  *   the Free Software Foundation; either version 2 of the License, or
   7  *   (at your option) any later version.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program; if not, write to the Free Software
  16  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  17  *
  18  *   Copyright (C) 2005 Wu Qi Ming infineon
  19  *
  20  *   Rewrite of Infineon IFXMips code, thanks to infineon for the support,
  21  *   software and hardware
  22  *
  23  *   Copyright (C) 2007 John Crispin <blogic@openwrt.org>
  24  *
  25  */
  26
  27 #include <linux/init.h>
  28 #include <linux/bootmem.h>
  29 #include <asm/bootinfo.h>
  30 #include <asm/ifxmips/ifxmips.h>
  31
  32 static char buf[1024];
  33
  34 void
  35 prom_free_prom_memory (void)
  36 {
  37 }
  38
  39 void
  40 prom_putchar (char c)
  41 {
  42         while ((ifxmips_r32(IFXMIPS_ASC1_FSTAT) & ASCFSTAT_TXFFLMASK) >> ASCFSTAT_TXFFLOFF);
  43
  44         if (c == '\n')
  45                 ifxmips_w32('\r', IFXMIPS_ASC1_TBUF);
  46         ifxmips_w32(c, IFXMIPS_ASC1_TBUF);
  47 }
  48
  49 void
  50 prom_printf (const char * fmt, ...)
  51 {
  52         va_list args;
  53         int l;
  54         char *p, *buf_end;
  55
  56         va_start(args, fmt);
  57         l = vsprintf(buf, fmt, args);
  58         va_end(args);
  59         buf_end = buf + l;
  60
  61         for (p = buf; p < buf_end; p++)
  62         {
  63                 prom_putchar(*p);
  64         }
  65 }
  66
  67 void __init
  68 prom_init(void)
  69 {
  70         mips_machtype = MACH_INFINEON_IFXMIPS;
  71
  72         strcpy(&(arcs_cmdline[0]), "console=ttyS0,115200 rootfstype=squashfs,jffs2 init=/etc/preinit");
  73         add_memory_region (0x00000000, 0x2000000, BOOT_MEM_RAM);
  74 }