bl_regioninit.s
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;/*****************************************************************************
;* Copyright Statement:
;* --------------------
;* This software is protected by Copyright and the information contained
;* herein is confidential. The software may not be copied and the information
;* contained herein may not be used or disclosed except with the written
;* permission of MediaTek Inc. (C) 2005
;*
;* BY OPENING THIS FILE, BUYER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
;* THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
;* RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO BUYER ON
;* AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
;* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
;* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
;* NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
;* SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
;* SUPPLIED WITH THE MEDIATEK SOFTWARE, AND BUYER AGREES TO LOOK ONLY TO SUCH
;* THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. MEDIATEK SHALL ALSO
;* NOT BE RESPONSIBLE FOR ANY MEDIATEK SOFTWARE RELEASES MADE TO BUYER'S
;* SPECIFICATION OR TO CONFORM TO A PARTICULAR STANDARD OR OPEN FORUM.
;*
;* BUYER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND CUMULATIVE
;* LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL BE,
;* AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
;* OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY BUYER TO
;* MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
;*
;* THE TRANSACTION CONTEMPLATED HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE
;* WITH THE LAWS OF THE STATE OF CALIFORNIA, USA, EXCLUDING ITS CONFLICT OF
;* LAWS PRINCIPLES. ANY DISPUTES, CONTROVERSIES OR CLAIMS ARISING THEREOF AND
;* RELATED THERETO SHALL BE SETTLED BY ARBITRATION IN SAN FRANCISCO, CA, UNDER
;* THE RULES OF THE INTERNATIONAL CHAMBER OF COMMERCE (ICC).
;*
;*****************************************************************************/
;
;/*******************************************************************************
; *
; * Filename:
; * ---------
; * regioninit.s
; *
; * Project:
; * --------
; * Bootloader
; *
; * Description:
; * ------------
; * This Module defines the initialization of RW/ZI/RO data for each area..
; *
; * Author:
; * -------
; * -------
; *
; *============================================================================
; * HISTORY
; * Below this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
; *------------------------------------------------------------------------------
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; *------------------------------------------------------------------------------
; * Upper this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
; *============================================================================
; ****************************************************************************/
;**************************************************************
;* File: regioninit.s *
;* Purpose: Application Startup Code *
;**************************************************************
;
; This file contains the macro and supporting subroutines to
; copy RO code and RW data from ROM to RAM and zero-initialize
; the ZI data areas in RAM.
IF (:LNOT: :DEF: __USB_DOWNLOAD__)
GBLL __USB_DOWNLOAD__
__USB_DOWNLOAD__ SETL {FALSE}
ENDIF
IF (:LNOT: :DEF: __FOTA_ENABLE__)
GBLL __FOTA_ENABLE__
__FOTA_ENABLE__ SETL {FALSE}
ENDIF
; /* Added by Anthony Chin 10/28/2001. */
CODE32
AREA RegionInit, CODE, READONLY
IF (:DEF: __MINI_BOOTLOADER__)
EXPORT InitRegions
EXPORT INT_InitEMIInitCode
ENDIF
IF (:DEF: __EXT_BOOTLOADER__)
EXPORT InitRegionsExt
EXPORT InitRegionPre
ENDIF
; This macro:
; a) copies RO code and/or RW data from ROM at Load$$area$$Base
; to RAM at Image$$area$$Base, of length Image$$area$$Length bytes.
; b) fills with zero the ZI data in RAM at Image$$area$$ZI$$Base,
; of length Image$$area$$ZI$$Length bytes.
MACRO
macro_RegionInit $areaname
LCLS namecp
LCLS copyloadsym
LCLS copybasesym
LCLS copylensym
LCLS zibasesym
LCLS zilensym
namecp SETS "$areaname"
copyloadsym SETS "|Load$$$$":CC:namecp:CC:"$$$$Base|"
copybasesym SETS "|Image$$$$":CC:namecp:CC:"$$$$Base|"
copylensym SETS "|Image$$$$":CC:namecp:CC:"$$$$Length|"
zibasesym SETS "|Image$$$$":CC:namecp:CC:"$$$$ZI$$$$Base|"
zilensym SETS "|Image$$$$":CC:namecp:CC:"$$$$ZI$$$$Length|"
; The following symbols are generated by the linker. They are imported
; WEAKly because they may not all have defined values. Those which are
; undefined will take the value zero.
IMPORT $copyloadsym, WEAK
IMPORT $copybasesym, WEAK
IMPORT $copylensym, WEAK
IMPORT $zibasesym, WEAK
IMPORT $zilensym, WEAK
LDR r0, =$copyloadsym ; load address of region
LDR r1, =$copybasesym ; execution address of region
MOV r2, r1 ; copy execution address into r2
LDR r3, =$copylensym
ADD r2, r2, r3 ; add region length to execution address to...
; ...calculate address of word beyond end...
; ... of execution region
BL copy_region
LDR r2, =$zilensym ; get length of ZI region
LDR r0, =$zibasesym ; load base address of ZI region
MOV r1, r0 ; copy base address of ZI region into r1
ADD r1, r1, r2 ; add region length to base address to...
; ...calculate address of word beyond end...
; ... of ZI region
BL zi_init
MEND
; InitRegions is called from boot.s to initialize the specified execution regions.
; In this example, the regions are called 32bitRAM and 16bitRAM.
; These execution region names should match those given in the scatter description file.
IF (:DEF: __MINI_BOOTLOADER__)
; Don't save lr to sp for that sp is not initialized at this point.
; Use the temp sp.
;
;/*************************************************************************/
;/* */
;/* FUNCTION */
;/* InitRegions */
;/* */
;/* DESCRIPTION */
;/* Initialize the bootloader RW/ZI regions */
;/* */
;/* INPUTS */
;/* None */
;/* */
;/* OUTPUTS */
;/* None */
;/*************************************************************************/
; VOID InitRegions(VOID)
; {
;
InitRegions
mov R7,lr
IF :LNOT: :DEF: __SERIAL_FLASH_EN__
macro_RegionInit READ_WRITE_INT
macro_RegionInit READ_ONLY_INT
ENDIF
macro_RegionInit READ_WRITE
bx R7
;}
; INT_InitXXXRegions is called from bootarm.s to initialize the specified execution regions.
; NoteXXX: The register r12 will be used in the bootarm.s. We should be careful not to
; overwrite r12.
;
;
;/*************************************************************************/
;/* */
;/* FUNCTION */
;/* INT_InitEMIInitCode */
;/* */
;/* DESCRIPTION */
;/* Initialize the EMI setting related code regions */
;/* */
;/* INPUTS */
;/* None */
;/* */
;/* OUTPUTS */
;/* None */
;/*************************************************************************/
; VOID INT_InitEMIInitCode(VOID)
; {
;
INT_InitEMIInitCode
MOV r7,lr
macro_RegionInit EMIINIT_CODE
IF :DEF: __SERIAL_FLASH_EN__
macro_RegionInit READ_WRITE_INT
macro_RegionInit READ_ONLY_INT
ENDIF
BX r7 ; Return to caller
;}
ENDIF
IF (:DEF: __EXT_BOOTLOADER__)
;/*************************************************************************/
;/* */
;/* FUNCTION */
;/* InitRegionsEx */
;/* */
;/* DESCRIPTION */
;/* Initialize the bootloader RW/ZI regions */
;/* */
;/* INPUTS */
;/* None */
;/* */
;/* OUTPUTS */
;/* None */
;/*************************************************************************/
; VOID InitRegionsEx(VOID)
; {
;
InitRegionsExt
mov R7,lr
macro_RegionInit DA_SHARE
macro_RegionInit EXT_READ_WRITE_INT
macro_RegionInit EXT_READ_ONLY_INT
macro_RegionInit EXT_READ_WRITE
bx R7
;}
InitRegionPre
IMPORT |Load$$REGION_INIT_SUB$$Base|, WEAK
IMPORT |Image$$REGION_INIT_SUB$$Base|, WEAK
IMPORT |Image$$REGION_INIT_SUB$$Length|, WEAK
LDR r0, =|Load$$REGION_INIT_SUB$$Base|
LDR r1, =|Image$$REGION_INIT_SUB$$Base|
MOV r2, r1
LDR r3, =|Image$$REGION_INIT_SUB$$Length|
ADD r2, r2, r3
InitRegionPre_copy
CMP r1, r2
LDRLO r3, [r0], #4
STRLO r3, [r1], #4
BLO InitRegionPre_copy
bx lr
ENDIF
; --- copy and zi_init subroutines
AREA REGION_INIT_SUB, CODE, READONLY
; copy is a subroutine which copies a region, from an address given by
; r0 to an address given by r1. The address of the word beyond the end
; of this region is held in r2. r3 is used to hold the word being copied.
copy
CMP r1, r2 ; loop whilst r1 < r2
LDRLO r3, [r0], #4
STRLO r3, [r1], #4
BLO copy
MOV pc, lr ; return from subroutine copy
copy_region
CMP r0, r1
BHI copy
MOVEQ pc, lr
SUB r3, r2, r1
SUB r3, r3, #4
MOV r2, r1
ADD r0, r0, r3
ADD r1, r1, r3
; backward_copy is a subroutine which copies a region, from an address given by
; r0 to an address given by r1. The address of the word beyond the end
; of this region is held in r2. r3 is used to hold the word being copied.
backward_copy
CMP r1, r2 ; loop whilst r1 < r2
LDRGE r3, [r0], #-4
STRGE r3, [r1], #-4
BGE backward_copy
MOV pc, lr ; return from subroutine copy
; zi_init is a subroutine which zero-initialises a region,
; starting at the address in r0. The address of the word
; beyond the end of this region is held in r1.
zi_init
MOV r2, #0
CMP r0, r1 ; loop whilst r0 < r1
STRLO r2, [r0], #4
BLO zi_init
MOV pc, lr ; return from subroutine zi_init
END