arch/ppc/boot/simple/misc-cpci690.c

   1 /*
   2  * Add birec data for Force CPCI690 board.
   3  *
   4  * Author: Mark A. Greer <source@mvista.com>
   5  *
   6  * 2003 (c) MontaVista Software, Inc.  This file is licensed under
   7  * the terms of the GNU General Public License version 2.  This program
   8  * is licensed "as is" without any warranty of any kind, whether express
   9  * or implied.
  10  */
  11
  12 #include <linux/types.h>
  13 #include <asm/io.h>
  14 #include <platforms/cpci690.h>
  15
  16 #define KB      (1024UL)
  17 #define MB      (1024UL*KB)
  18 #define GB      (1024UL*MB)
  19
  20 extern u32 mv64x60_console_baud;
  21 extern u32 mv64x60_mpsc_clk_src;
  22 extern u32 mv64x60_mpsc_clk_freq;
  23
  24 u32 mag = 0xffff;
  25
  26 unsigned long
  27 get_mem_size(void)
  28 {
  29         u32     size;
  30
  31         switch (in_8(((void __iomem *)CPCI690_BR_BASE + CPCI690_BR_MEM_CTLR))
  32                         & 0x07) {
  33         case 0x01:
  34                 size = 256*MB;
  35                 break;
  36         case 0x02:
  37                 size = 512*MB;
  38                 break;
  39         case 0x03:
  40                 size = 768*MB;
  41                 break;
  42         case 0x04:
  43                 size = 1*GB;
  44                 break;
  45         case 0x05:
  46                 size = 1*GB + 512*MB;
  47                 break;
  48         case 0x06:
  49                 size = 2*GB;
  50                 break;
  51         default:
  52                 size = 0;
  53         }
  54
  55         return size;
  56 }
  57
  58 void
  59 mv64x60_board_init(void __iomem *old_base, void __iomem *new_base)
  60 {
  61         mv64x60_console_baud = CPCI690_MPSC_BAUD;
  62         mv64x60_mpsc_clk_src = CPCI690_MPSC_CLK_SRC;
  63         mv64x60_mpsc_clk_freq =
  64                 (get_mem_size() >= (1*GB)) ? 100000000 : 133333333;
  65 }