arch/mips/ite-boards/qed-4n-s01b/init.c

   1 /*
   2  * BRIEF MODULE DESCRIPTION
   3  *      IT8172/QED5231 board setup.
   4  *
   5  * Copyright 2000 MontaVista Software Inc.
   6  * Author: MontaVista Software, Inc.
   7  *              ppopov@mvista.com or source@mvista.com
   8  *
   9  *  This program is free software; you can redistribute  it and/or modify it
  10  *  under  the terms of  the GNU General  Public License as published by the
  11  *  Free Software Foundation;  either version 2 of the  License, or (at your
  12  *  option) any later version.
  13  *
  14  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  15  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  16  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  17  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  18  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  20  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  21  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  22  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  *
  25  *  You should have received a copy of the  GNU General Public License along
  26  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  27  *  675 Mass Ave, Cambridge, MA 02139, USA.
  28  */
  29 #include <linux/init.h>
  30 #include <linux/mm.h>
  31 #include <linux/sched.h>
  32 #include <linux/bootmem.h>
  33 #include <asm/addrspace.h>
  34 #include <asm/bootinfo.h>
  35 #include <linux/string.h>
  36 #include <linux/kernel.h>
  37 #include <asm/it8172/it8172.h>
  38 #include <asm/it8172/it8172_dbg.h>
  39
  40 int prom_argc;
  41 char **prom_argv, **prom_envp;
  42
  43 extern char _end;
  44 extern void  __init prom_init_cmdline(void);
  45 extern unsigned long __init prom_get_memsize(void);
  46 extern void __init it8172_init_ram_resource(unsigned long memsize);
  47
  48 #define PFN_UP(x)       (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
  49 #define PFN_ALIGN(x)    (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK)
  50
  51 const char *get_system_type(void)
  52 {
  53         return "ITE QED-4N-S01B";
  54 }
  55
  56 void __init prom_init(void)
  57 {
  58         unsigned long mem_size;
  59         unsigned long pcicr;
  60
  61         prom_argc = fw_arg0;
  62         prom_argv = (char **) fw_arg1;
  63         prom_envp = (int *) fw_arg3;
  64
  65         mips_machgroup = MACH_GROUP_ITE;
  66         mips_machtype = MACH_QED_4N_S01B;  /* ITE board name/number */
  67
  68         prom_init_cmdline();
  69         mem_size = prom_get_memsize();
  70
  71         printk("Memory size: %dMB\n", (unsigned)mem_size);
  72
  73         mem_size <<= 20; /* MB */
  74
  75         /*
  76          * make the entire physical memory visible to pci bus masters
  77          */
  78         IT_READ(IT_MC_PCICR, pcicr);
  79         pcicr &= ~0x1f;
  80         pcicr |= (mem_size - 1) >> 22;
  81         IT_WRITE(IT_MC_PCICR, pcicr);
  82
  83         it8172_init_ram_resource(mem_size);
  84         add_memory_region(0, mem_size, BOOT_MEM_RAM);
  85 }