startup.lst

EP9315的BSP包(WINCE下的BSP,内有各种驱动的详细的代码)

ARM macroassembler      Page:1 
    1 00000000          ;********************************************************************** 
    2 00000000          ;                                                                       
    3 00000000          ; Filename: startup.s 
    4 00000000          ;                                                                       
    5 00000000          ; Description: Initialization before the MMU gets turned.  This is 
    6 00000000          ;              the first code that gets executed. 
    7 00000000          ; 
    8 00000000          ; THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF 
    9 00000000          ; ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO 
   10 00000000          ; THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A 
   11 00000000          ; PARTICULAR PURPOSE. 
   12 00000000          ; 
   13 00000000          ; Use of this source code is subject to the terms of the Cirrus end-user 
   14 00000000          ; license agreement (EULA) under which you licensed this SOFTWARE PRODUCT. 
   15 00000000          ; If you did not accept the terms of the EULA, you are not authorized to  
   16 00000000          ; use this source code. For a copy of the EULA, please see the  
   17 00000000          ; EULA.RTF on your install media. 
   18 00000000          ; 
   19 00000000          ; Copyright(c) Cirrus Logic Corporation 2002, All Rights Reserved                        
   20 00000000          ;                                                                       
   21 00000000          ;********************************************************************** 
   22 00000000            
   25 00000000              OPT 1   ; reenable listing 
   26 00000000              OPT 128 ; disable listing of macro expansions 
   27 00000000            
   28 00000000            
   29 00000000          ; 
   30 00000000          ; ASync bus mode, little endian, MMU disabled 
   31 00000000          ; 
   32 00000000          ;CP15R1Init      EQU             0xC0000078            
   33 00000000          CP15R1Init      EQU             0xC0001078            
   34 00000000          CLKSET1DEFAULT  EQU             0x000398e7 
   35 00000000            
   36 00000000                          IMPORT          KernelStart 
   37 00000000                          IMPORT          OEMAddressTable 
   38 00000000                          IMPORT          SysconSetup 
   39 00000000                          IMPORT          SdramCfg 
   40 00000000            
   41 00000000            
   42 00000000          ;********************************************************************** 
   43 00000000          ;  StartUp routine to initialize the processor. 
   44 00000000          ;********************************************************************** 
   45 00000000                          STARTUPTEXT 
   46 00000000 43 52 55                 DCB             "CRUS", 0  
               53 00      
   47 00000005            
   48 00000005                          LEAF_ENTRY      StartUp 
   49 00000006            
   50 00000006          ; 
   51 00000006          ;  Kill watch dog timer. Before any thing else. 
   52 00000006          ; 
   53 00000006 00 00    *align 
   53 00000008 e59f0058                 ldr             r0, =0x80940000 
   54 0000000c e59f1058                 ldr             r1, =0xAA55 
   55 00000010 e5801000                 str             r1, [r0] 
   56 00000014            
   57 00000014          ; 
   58 00000014          ; ensure SVC32 mode with IRQ and FIQ disabled 
   59 00000014          ; 
   60 00000014                   
   61 00000014 e3a000d3                 mov             r0, #0xd3 
   62 00000018 e121f000                 msr             cpsr_c, r0 
   63 0000001c            
   64 0000001c          ; 
   65 0000001c          ; Check to see if we are executing in flash, if so we may need to 
   66 0000001c          ; setup SDRAM. 
   67 0000001c          ; 
   68 0000001c e35f0206                 cmp             pc, #0x60000000 
   69 00000020 9a000005                 bls             DontConfigureSDRAM 
   70 00000024            
   71 00000024          ; 
   72 00000024          ; If we loaded through eboot, SDRAM is already configured.  
   73 00000024          ; Check the CLKSET1 register to see if it has been modified. 
   74 00000024          ; 
   75 00000024 e59f0044                 ldr             r0, =0x80930020  
   76 00000028 e5901000                 ldr             r1, [r0] 
   77 0000002c e59f0040                 ldr             r0, =CLKSET1DEFAULT 
   78 00000030 e1500001                 cmp             r0, r1 
   79 00000034 1a000000                 bne             DontConfigureSDRAM 
   80 00000038            
   81 00000038          ;                 
   82 00000038          ; 
   83 00000038          ; Configure SDRAM 
   84 00000038          ; 
   85 00000038 eb000000                 bl              SdramCfg 
   86 0000003c            
   87 0000003c          DontConfigureSDRAM 
   88 0000003c            
   89 0000003c          ; 
   90 0000003c          ; Turn off the MMU 
   91 0000003c          ; 
   92 0000003c e59f0034                 ldr             r0, =0xC0001078            
   93 00000040 ee010f10                 mcr             p15, 0, r0, c1, c0, 0 
   94 00000044            
   95 00000044            
   96 00000044          ; 
   97 00000044          ; create a temporary stack below kernel memory from config.bib 
   98 00000044          ; 
   99 00000044 e3a0d701                 mov             sp, #0x40000 
  100 00000048 eb000000                 bl              SysconSetup 
  101 0000004c            
  102 0000004c          ; 
  103 0000004c          ; clear out magic words for memory and heap 
  104 0000004c          ; (r0) = physical address of OEMAddressTable 
  105 0000004c          ; 
  106 0000004c          ; 
  107 0000004c          ; Calculate the physical address of the table. 
  108 0000004c          ; 
  109 0000004c          ; r0 - Virtual address of OEMAddressTable 
  110 0000004c          ; r1 - Physical Address of Startup 
  111 0000004c          ; r2 - Virtual Address of Startup 
  112 0000004c          ; 
  113 0000004c          ; r0 = r0 - r2 + r1 = Physical address of OEMAddressTable  
  114 0000004c          ;             
  115 0000004c e59f0028                 ldr             r0,=OEMAddressTable 
  116 00000050 e24f1052                 adr             r1,StartUp 
  117 00000054 e59f2024                 ldr             r2,=StartUp         
  118 00000058 e0800001                 add             r0, r0, r1 
  119 0000005c e0400002                 sub             r0, r0, r2 
  120 00000060 eb000000                 bl              KernelStart 
  121 00000064          ; 
  122 00000064          ; KernelStart should never return: 
  123 00000064          ; 
  124 00000064               
  125 00000064 eafffffe spin            b               spin 
  126 00000068            
  127 00000068            
  128 00000068            
  129 00000068          ;**************************************************************************** 
  130 00000068          ; Include the appropriate memory map. 
  131 00000068          ;**************************************************************************** 
  132 00000068          ;                INCLUDE         mmumap.inc 
  133 00000068            
  134 00000068          ; End of initialization code & data 
  135 00000068                          TEXTAREA 
  136 00000000            
  137 00000000                          END 
Assembly terminated, errors: 0, warnings: 0