xllp_pm_sleepcontexta.s

优龙pxa270平台试验程序

@ cjw Trial version for Swee
@TEST_STUB_PWR_OFF EQU 1
@******************************************************************************
@
@  COPYRIGHT (C) 2002 Intel Corporation. 
@
@  This software as well as the software described in it is furnished under 
@  license and may only be used or copied in accordance with the terms of the 
@  license. The information in this file is furnished for informational use 
@  only, is subject to change without notice, and should not be construed as 
@  a commitment by Intel Corporation. Intel Corporation assumes no 
@  responsibility or liability for any errors or inaccuracies that may appear  
@  in this document or any software that may be provided in association with 
@  this document.
@    
@  Except as permitted by such license, no part of this document may be 
@  reproduced, stored in a retrieval system, or transmitted in any form or by 
@  any means without the express written consent of Intel Corporation. 
@
@  FILENAME:       xllp_Pm_SleepContextA.s
@
@  PURPOSE:        Provides assembly level code to support context saving, 
@                  processor sleep and context restoration after sleep
@                  for the Bulverde/Mainstone processor/platform.
@                  
@
@  LAST MODIFIED:  8/27/02
@******************************************************************************
@
@ The functions in this source code are called via a branch with link instruction.
@
@ NOTES:
@
@ These functions assume that the MMU is enabled, except for any which receive all addresses
@ as parameters.
@
    .include  "xlli_Bulverde_defs.inc"              @ Bulverde specific include file
    .include  "xlli_Mainstone_defs.inc"             @ Mainstone specific include file
    .include  "xllp_Pm_SleepContext.inc"            @ Definitions for this file
@ IF 0=1
    .ifdef xxNEVER_DO_THIS
    .include  "mainstone.mac"                       @ Definitions for this file
    .endif @0 : development LED markers
@
    .text 
    .align 5                            @ Align =5 required for "ALIGN 32" to work
@
@ Functions made public by this file:
@
    .global XllpPmEnterSleep
    .global XllpPmChecksumSleepDataVi
    .global XllpPmRestoreAfterSleep                   @ Not called by name elsewhere.

@
@ External functions required for this file:
@
    .extern XllpPmSleepCLevelProcessing__FP28XLLP_PM_ENTER_SLEEP_PARAMS_T
    .extern XllpPmWakeCLevelProcessing__FP28XLLP_PM_ENTER_SLEEP_PARAMS_TP25XLLP_PM_SLEEP_SAVE_DATA_SUl

@**************************************************************************************************
@
@ XllpPmChecksumSleepDataVi
@
@ Does not assume a stack or MMU enable/disable state.
@ 
@ Inputs: 
@       R0: Base address of area to checksum
@       R1: Number of 4-byte words in area
@       Assumes return address in link register
@
@ Returns:
@       R0: Checksum
@
@ Uses: R0, R1, R2, R3  
@


XllpPmChecksumSleepDataVi: 

    @ do Checksum on the buffer

    ldr     r2, =(0x5A72)                  @ Pick a non-zero seed.
@30
XllpPmChVi_Lab1: 
    ldr     r3, [r0], #4                   @ get value and increment pointer
    add     r2, r2,   r3
    mov     r2, r2,   ROR #31              @ Rotate left by one bit position
    subs    r1, r1,   #1                   @ Count down for entire buffer size
@    bne     %b30
    bne     XllpPmChVi_Lab1
    mov     r0, r2

    
    .ifdef Interworking
	bx lr
    .else
	.ifdef Thumbing
	  bx lr
	.else
	  mov pc, lr
	.endif
    .endif    


@; End of XllpPmChecksumSleepDataVi()
@**************************************************************************************************


@******************************************************************************
@
@
@       ********************
@       *                  * 
@       * XllpPmEnterSleep *
@       *                  *
@       ********************
@
@
@ NOTES: Written for the Bulverde Processor on the Mainstone Development Platform.
@
@;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;     
@    XllpPmEnterSleep() is an assembly-coded function that:
@