mmu_util.s

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#/*************************************************************************/
#/*                                                                       */
#/*        Copyright (c) 1993-2001 Accelerated Technology, Inc.           */
#/*                                                                       */
#/* PROPRIETARY RIGHTS of Accelerated Technology are involved in the      */
#/* subject matter of this material.  All manufacturing, reproduction,    */
#/* use, and sales rights pertaining to this subject matter are governed  */
#/* by the license agreement.  The recipient of this software implicitly  */
#/* accepts the terms of the license.                                     */
#/*                                                                       */
#/*************************************************************************/

#/*************************************************************************/
#/*                                                                       */
#/* FILE NAME                               VERSION                       */
#/*                                                                       */
#/*    mmu_util.s                  Nucleus PLUS\MPC8245\Diab C/C++ 1.13.1 */
#/*                                                                       */
#/* COMPONENT                                                             */
#/*                                                                       */
#/*      User MMU Initialization                                          */
#/*                                                                       */
#/* DESCRIPTION                                                           */
#/*                                                                       */
#/*      This file contains support functions for setting MMU registers.  */
#/*                                                                       */
#/*                                                                       */
#/* DATA STRUCTURES                                                       */
#/*                                                                       */
#/*      None                                                             */
#/*                                                                       */
#/* FUNCTIONS                                                             */
#/*                                                                       */
#/* DEPENDENCIES                                                          */
#/*                                                                       */
#/*      None                                                             */
#/*                                                                       */
#/* HISTORY                                                               */
#/*                                                                       */
#/*         NAME              DATE                    REMARKS             */
#/*                                                                       */
#/*      T. Weller        12\19\2001       Created inital version 1.13.1  */
#/*************************************************************************/

    .file       "mmu_util.s"

SDR1            .equ        25      # SDR1 SPR25  

#/************************************************************************/
#/*                                                                      */
#/*  MMU_Put_SR                                                          */
#/*                                                                      */
#/*  Sets up the segment register identified in R3 with the data in R4   */
#/*                                                                      */
#/************************************************************************/
    .text
    .align      2
    .globl      MMU_Put_SR
MMU_Put_SR:
    mtsrin r4, r3
    blr

#/************************************************************************/
#/*                                                                      */
#/*  MMU_Set_SDR1                                                        */
#/*                                                                      */
#/*  Sets up the SDR1 register                                           */
#/*                                                                      */
#/************************************************************************/
    .text
    .align      2
    .globl      MMU_Set_SDR1
MMU_Set_SDR1:
    mtspr   SDR1, r3
    blr

#/************************************************************************/
#/*                                                                      */
#/*  MMU_Invalidate_TLB                                                  */
#/*                                                                      */
#/*                                                                      */
#/************************************************************************/
    .text
    .align      2
    .globl      MMU_Invalidate_TLB
MMU_Invalidate_TLB:
                
    tlbie r3
    blr

#/************************************************************************/
#/*                                                                      */
#/*  MMU_Put_UINT32                                                      */
#/*     r3 holds the address                                             */
#/*     r4 holds the value                                               */
#/*                                                                      */
#/************************************************************************/
    .text
    .align        2
    .globl        MMU_Put_UINT32
MMU_Put_UINT32:
    stw     r4,0(r3)
    mr     r3,r4
    blr
#/************************************************************************/
#/*                                                                      */
#/*  MMU_Get_UINT32                                                      */
#/*   Gets the byte word at r3 and puts it in r3                         */
#/*                                                                      */
#/************************************************************************/

    .text
    .align        2
    .globl        MMU_Get_UINT32
MMU_Get_UINT32:
     lwz      r3,0(r3)
     blr