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 #ifdef CONFIG_IFXMIPS_USE_CONSOLE0
  33 #define ASC_OFFSET                                                      0
  34 #elif CONFIG_IFXMIPS_USE_CONSOLE1
  35 #define ASC_OFFSET                                                      IFXMIPS_ASC1_BASE_OFFSET
  36 #else
  37 #error a tty for the console must be selected
  38 #endif
  39 static char buf[1024];
  40
  41 void
  42 prom_free_prom_memory (void)
  43 {
  44 }
  45
  46 void
  47 prom_putchar (char c)
  48 {
  49         while ((readl(IFXMIPS_ASC0_FSTAT + ASC_OFFSET) & ASCFSTAT_TXFFLMASK) >> ASCFSTAT_TXFFLOFF);
  50
  51         if (c == '\n')
  52                 writel('\r', IFXMIPS_ASC0_TBUF + ASC_OFFSET);
  53         writel(c, IFXMIPS_ASC0_TBUF + ASC_OFFSET);
  54 }
  55
  56 void
  57 prom_printf (const char * fmt, ...)
  58 {
  59         va_list args;
  60         int l;
  61         char *p, *buf_end;
  62
  63         va_start(args, fmt);
  64         l = vsprintf(buf, fmt, args);
  65         va_end(args);
  66         buf_end = buf + l;
  67
  68         for (p = buf; p < buf_end; p++)
  69         {
  70                 prom_putchar(*p);
  71         }
  72 }
  73
  74 void __init
  75 prom_init(void)
  76 {
  77         mips_machgroup = MACH_GROUP_IFXMIPS;
  78         mips_machtype = MACH_INFINEON_IFXMIPS;
  79
  80         strcpy(&(arcs_cmdline[0]), "console=ttyS0,115200 rootfstype=squashfs,jffs2 init=/etc/preinit");
  81         add_memory_region (0x00000000, 0x2000000, BOOT_MEM_RAM);
  82 }