cpu/mpc824x/drivers/dma/dma2.S

   1 /**************************************
   2  *
   3  * copyright @ Motorola, 1999
   4  *
   5  **************************************/
   6
   7 /**********************************************************
   8  * function: load_runtime_reg
   9  *
  10  * input:  r3 - value of eumbbar
  11  *         r4 - register offset in embedded utility space
  12  *
  13  * output: r3 - register content
  14  **********************************************************/
  15         .text
  16         .align 2
  17         .global load_runtime_reg
  18
  19 load_runtime_reg:
  20
  21         lwbrx   r3,r4,r3
  22         sync
  23
  24         bclr 20, 0
  25
  26 /****************************************************************
  27  * function: store_runtime_reg
  28  *
  29  * input: r3 - value of eumbbar
  30  *        r4 - register offset in embedded utility space
  31  *        r5 - new value to be stored
  32  *
  33  ****************************************************************/
  34         .text
  35         .align 2
  36         .global store_runtime_reg
  37 store_runtime_reg:
  38
  39         stwbrx r5,  r4, r3
  40         sync
  41
  42         bclr   20,0