init_platform.c

yamon2.27.tar.gz bootloader 在au1200上完全通过

/************************************************************************
*
*  init_platform.c
*
*  Platform specific startup code (c-code)
*
*
* ######################################################################
*
* Copyright (c) 1999-2000 MIPS Technologies, Inc. All rights reserved.
*
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* America.
*
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* Inc. ("MIPS Technologies"). Any copying, modifying or use of this information
* (in whole or in part) which is not expressly permitted in writing by MIPS
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* protected under federal copyright laws. Violations thereof may result in
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************************************************************************/


/************************************************************************
*  Include files
************************************************************************/

#include <sysdefs.h>
#include <init.h>
#include <sys_api.h>
#include <syscon_api.h>
#include <pci_api.h>
#include <excep_api.h>
#include <stdio.h>
#include <product.h>
#include <malta.h>
#include <atlas.h>
#include <pb1000.h>

/************************************************************************
*  Definitions
************************************************************************/

/************************************************************************
*  Static function prototypes
************************************************************************/

/************************************************************************
*  Implementation : Public functions
************************************************************************/

/************************************************************************
*
*                          arch_platform_init
*  Description :
*  -------------
*
*  Platform specific initialisation code
*
*  Return values :
*  ---------------
*
*  None
*
************************************************************************/
void
arch_platform_init(
				   bool early )	/* TRUE -> Before initmodules(), FALSE -> after */
{
    UINT32 data, cpufreq;
    UINT8  data8, revmaj, revmin;

    /* TBD : Some of this may be moved to drivers (or a new "SuperIO" module) */

    if( early )
    {

        switch( sys_platform )
		{

		case PRODUCT_PB1000_ID:

			/* PBUpdate - insert pre module init stuff here */
			au1000_memtest();
			break;


		  default :

			  break;
        }
    }
    else
    {
        /* !early */

        revmaj = (atoi(_REVMAJ_) & 0xff);
        revmin = (atoi(_REVMIN_) & 0xff);
		cpufreq = ((*(volatile unsigned long *)0xb1900060) & 0x3f) * 12;
        // convert to BCD
        cpufreq = ((cpufreq / 100) << 8) | (((cpufreq / 10) % 10)) << 4 | (cpufreq % 10);

        switch( sys_platform )
		{
		case PRODUCT_PB1000_ID:
			/* PBUpdate - insert post module init stuff here */

#ifdef PB1500_CONFIG
#define brd_ledreg  (*(volatile unsigned long *)0xae000018)
#define brd_hexdisp (*(volatile unsigned long *)0xaf000000)
#define brd_hexblnk (*(volatile unsigned long *)0xaf000008)
            // construct hex display
			data = (revmaj << 24) | (revmin << 16) | cpufreq;
            brd_hexdisp = data;
            brd_hexblnk = 0x08;
            brd_ledreg &= ~0x40;
#endif 

#ifdef PB1100_CONFIG
#define brd_ledreg  (*(volatile unsigned short*)0xae000018)
#define brd_hexdisp (*(volatile unsigned long *)0xaf000000)
#define brd_hexblnk (*(volatile unsigned long *)0xaf000008)
            // construct hex display
			data = (revmaj << 24) | (revmin << 16) | cpufreq;
            brd_hexdisp = data;
            brd_hexblnk = 0x08;
            brd_ledreg &= ~0x40;
#endif 

#if defined(DB1500_CONFIG) || defined(DB1000_CONFIG) || defined(DB1100_CONFIG)
			// Change HEX display
			*(volatile int *)0xAF000000 = 0;
#endif

#ifdef PB1550_CONFIG
#define brd_hexdisp (*(volatile unsigned long *)0xaf800000)
#define brd_hexblnk (*(volatile unsigned long *)0xaf800008)
            // construct hex display
			data = (revmaj << 24) | (revmin << 16) | cpufreq;
            brd_hexdisp = data;
            brd_hexblnk = 0x08;
#endif 

#ifdef PB1200_CONFIG
            // construct hex display
			data = (revmaj << 24) | (revmin << 16) | cpufreq;
			*(volatile unsigned short *)(BCSR_ADDR|0x01C00008) = 0x8;
			*(volatile unsigned int *)  (BCSR_ADDR|0x01C00000) = data;
#endif 

#ifdef DB1200_CONFIG
			// Change HEX display
			*(volatile int *)0xB9C00000 = 0;
#endif
			break;

		default :
			break;
        }

        arch_core_init();
    }
}


/************************************************************************
*  Implementation : Static functions
************************************************************************/