arch/mips/txx9/rbtx4939/prom.c

   1 /*
   2  * rbtx4939 specific prom routines
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  */
   8
   9 #include <linux/init.h>
  10 #include <linux/memblock.h>
  11 #include <asm/txx9/generic.h>
  12 #include <asm/txx9/rbtx4939.h>
  13
  14 void __init rbtx4939_prom_init(void)
  15 {
  16         unsigned long start, size;
  17         u64 win;
  18         int i;
  19
  20         for (i = 0; i < 4; i++) {
  21                 if (!((__u32)____raw_readq(&tx4939_ddrcptr->winen) & (1 << i)))
  22                         continue;
  23                 win = ____raw_readq(&tx4939_ddrcptr->win[i]);
  24                 start = (unsigned long)(win >> 48);
  25                 size = (((unsigned long)(win >> 32) & 0xffff) + 1) - start;
  26                 memblock_add(start << 20, size << 20);
  27         }
  28         txx9_sio_putchar_init(TX4939_SIO_REG(0) & 0xfffffffffULL);
  29 }