sdramdcr.s

WINDRIVER SBC405 BSP

/* sdramDcr.s - IBM SDRAM controller DCR access assembly routines */

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   COPYRIGHT   I B M   CORPORATION 2000
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NOMANUAL
*******************************************************************************/

/*
modification history
--------------------
01e,30nov01,kab  Update for T2.2
01d,19nov01,pch  cleanup
01c,08may01,pch  Add assembler abstractions (FUNC_EXPORT, FUNC_BEGIN, etc.)
01b,15may00,mcg  register name updates to match 405GP User Manual
01a,17jan00,mcg  created
*/

/*
DESCRIPTION
This module contains chip-dependent routines written in assembly language.
*/

#define _ASMLANGUAGE

        /* globals */

        FUNC_EXPORT(sysDcrSdramGet)

	_WRS_TEXT_SEG_START

/*******************************************************************************
*
* sysDcrSdramGet - Get the contents of an SDRAM controller DCR register
*
* This routine reads the contents of the specified SDRAM controller register.
*
* SYNOPSIS
* \ss
* UINT32 sysDcrSdramGet(UINT32 sdramReg)
* \se
*
* RETURNS: Contents of argument SDRAM register
*/

FUNC_BEGIN(sysDcrSdramGet)

        mtdcr   SDRAM_CFGADDR, r3
#if defined (PPC405GP_REVB) || defined (PPC405GP_REVC)   /* revB/C errata # 8 */
        nop
        nop
        nop
#endif

        mfdcr   r3, SDRAM_CFGDATA
#if defined (PPC405GP_REVB) || defined (PPC405GP_REVC)   /* revB/C errata # 8 */
        nop
        nop
        nop
#endif
        blr
FUNC_END(sysDcrSdramGet)