package/nvram/src/sdinitvals.h

   1 /*
   2  * SDRAM init values
   3  *
   4  * Copyright 2007, Broadcom Corporation
   5  * Copyright 2009, OpenWrt.org
   6  * All Rights Reserved.
   7  *
   8  * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
   9  * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
  10  * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
  11  * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
  12  *
  13  */
  14
  15 #ifndef _sdinitvals_h_
  16 #define _sdinitvals_h_
  17
  18 /* SDRAM refresh control (refresh) register bits */
  19 #define SDRAM_REF(p)    (((p)&0xff) | SDRAM_REF_EN)     /* Refresh period */
  20 #define SDRAM_REF_EN    0x8000          /* Writing 1 enables periodic refresh */
  21
  22 /* SDRAM Core default Init values (OCP ID 0x803) */
  23 #define MEM4MX16X2      0x419   /* 16 MB */
  24
  25 #define SDRAM_INIT      MEM4MX16X2
  26 #define SDRAM_BURSTFULL 0x0000  /* Use full page bursts */
  27 #define SDRAM_CONFIG    SDRAM_BURSTFULL
  28 #define SDRAM_REFRESH   SDRAM_REF(0x40)
  29
  30 #endif /* _sdinitvals_h_ */