source: rtems/c/src/lib/libbsp/sh/gensh2/startup/hw_init.c @ 8b91282

/*
 *  hw_init.c: set up sh7045F internal subunits
 *             Pin and memory assignments assume
 *             target is Hitachi SH7045F EVB ("lcevb")
 *
 *  Author: John M. Mills (jmills@tga.com)
 *  COPYRIGHT(c) 1999, TGA Technologies, Inc
 *                     Norcross, GA 30071 U.S.A
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.OARcorp.com/rtems/license.html.
 *
 *  Adapted from Hitachi EVB7045F tutorial files by:
 *  John M. Mills (jmills@tga.com)
 *  TGA Technologies, Inc.
 *  100 Pinnacle Way, Suite 140
 *  Norcross, GA 30071 U.S.A.
 *  
 *
 *  This file may be copied and distributed in accordance
 *  the above-referenced license. It is provided for critique and
 *  developmental purposes without any warranty nor representation
 *  by the authors or by TGA Technologies.
 *
 *  $Id$
 */

#include <bsp.h>

#include <stdlib.h>

#include <rtems/libio.h>
#include <iosupp.h>
#include <rtems/score/sh_io.h>
#include <rtems/score/iosh7045.h>

/* exported entry */
extern void hw_initialize (void);

/* STANDALONE_EVB sets up bus, DRAM, PFC, and SCI0 */
/* no STANDALONE_EVB accepts defaults, adds RESET, SCI1, WDT */

/***************************************************/
/*      Inline function to access CPU features     */
/*      from C.  This makes use of GNU extensions. */
/***************************************************/

__inline__ void set_interrupt_mask(unsigned char mask)
{
  asm("mov.l r0,@-r15");
  asm("mov %0,r0"::"r"(mask));  
  asm("and #0xF,r0");
  asm("rotl r0");
  asm("rotl r0");
  asm("rotl r0");
  asm("rotl r0");
  asm("ldc r0,sr");
  asm("mov.l @r15+,r0");
}

void hw_initialize (void) 
{
        int a;
        unsigned8 temp8;
        unsigned16 temp16;

#ifdef STANDALONE_EVB
        /* FIXME: replace 'magic numbers' */

        write16(0x2020, BSC_BCR1);  /* Bus width access - 32-bit on CS1 */
        write16(0xF3DD, BSC_BCR2);  /* Idle cycles CS3-CS0 - 0 idle cycles*/
        write16(0xFF3F, BSC_WCR1);  /* Waits for CS3-CS0 - 3 waits on CS1 */
        write16(0x000F, BSC_WCR2);  /* Waits for DRAM/DMA access - default */
        write16(0x0000, BSC_DCR);   /* DRAM control - default */
        write16(0x0000, BSC_RTCSR); /* DRAM refresh - default */
        write16(0x0000, BSC_RTCNT); /* DRAM refresh counter - default*/
        write16(0x0000, BSC_RTCOR); /* DRAM refresh compare match - default */
        
        write16(0x5000, PFC_PACRH); /* Pin function controller - WRHH, WRHL */
        write16(0x1550, PFC_PACRL1); /* Pin fun. controller - WRH,WRL,RD,CS1 */
        write16(0x0000, PFC_PBCR1); /* Pin function controller - default */
        write16(0x2005, PFC_PBCR2); /* Pin function controller - A18,A17,A16 */
        write16(0xFFFF, PFC_PCCR);  /* Pin function controller - A15-A0  */
        write16(0x5555, PFC_PDCRH1; /* Pin function controller - D31-D24 */
        write16(0x5555, PFC_PDCRH2); /* Pin function controller - D23-D16 */
        write16(0xFFFF, PFC_PDCRL); /* Pin function controller - D15-D0  */
        write16(0x0000, PFC_IFCR);  /* Pin function controller - default */
        write16(0x0005, PFC_PACRL2); /* Pin function controller - Tx0, Rx0 */

        write16(0x00, PFC_PACRL2); /* default disconnects all I/O */
                                   /* pins; connected by DEVICE_open() */
#endif

        /* default hardware setup for SH7045F EVB */

        /* PFC: General I/O except pin 13 (reset): */
        temp16 = read16(PFC_PECR1) | 0x0800;
        write16(temp16, PFC_PECR1);

        /* All I/O lines bits 7-0: */
        write16(0x00, PFC_PECR2);

        /* P5 (LED) out, all other pins in: */
        temp16 = read16(PFC_PEIOR) | 0x0020;
        write16(temp16, PFC_PEIOR);

}