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

   1 /*
   2  *   This program is free software; you can redistribute it and/or modify
   3  *   it under the terms of the GNU General Public License as published by
   4  *   the Free Software Foundation; either version 2 of the License, or
   5  *   (at your option) any later version.
   6  *
   7  *   This program is distributed in the hope that it will be useful,
   8  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  *   GNU General Public License for more details.
  11  *
  12  *   You should have received a copy of the GNU General Public License
  13  *   along with this program; if not, write to the Free Software
  14  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  15  *
  16  *   Copyright 2007 John Crispin <blogic@openwrt.org>
  17  */
  18
  19 #include <linux/init.h>
  20 #include <linux/string.h>
  21 #include <linux/ctype.h>
  22 #include <linux/kernel.h>
  23 #include <linux/mm.h>
  24 #include <linux/bootmem.h>
  25 #include <linux/ioport.h>
  26 #include <asm/bootinfo.h>
  27 #include <asm/amazon/amazon.h>
  28 #include <asm/amazon/irq.h>
  29 #include <asm/amazon/model.h>
  30 #include <asm/cpu.h>
  31
  32 void prom_putchar(char c)
  33 {
  34         /* Wait for FIFO to empty */
  35         while ((amazon_readl(AMAZON_ASC_FSTAT) >> 8) != 0x00) ;
  36         /* Crude cr/nl handling is better than none */
  37         if(c == '\n')
  38                 amazon_writel('\r', AMAZON_ASC_TBUF);
  39         amazon_writel(c, AMAZON_ASC_TBUF);
  40 }
  41
  42 void prom_printf(const char * fmt, ...)
  43 {
  44         va_list args;
  45         int l;
  46         char *p, *buf_end;
  47         char buf[1024];
  48
  49         va_start(args, fmt);
  50         /* FIXME - hopefully i < sizeof(buf) */
  51         l = vsprintf(buf, fmt, args);
  52         va_end(args);
  53         buf_end = buf + l;
  54
  55         for (p = buf; p < buf_end; p++)
  56                 prom_putchar(*p);
  57 }
  58
  59
  60 void __init prom_init(void)
  61 {
  62         mips_machgroup = MACH_GROUP_INFINEON;
  63         mips_machtype = MACH_INFINEON_AMAZON;
  64
  65         strcpy(&(arcs_cmdline[0]), "console=ttyS0,115200 rootfstype=squashfs,jffs2 init=/etc/preinit");
  66
  67         add_memory_region(0x00000000, 0x1000000, BOOT_MEM_RAM);
  68 }
  69
  70 void prom_free_prom_memory(void)
  71 {
  72 }
  73
  74 const char *get_system_type(void)
  75 {
  76         return BOARD_SYSTEM_TYPE;
  77 }