init_ice.s

USB 软件配置的具体工程

;init the mem map no the integrate board


	include hardware_gfd.h


	AREA INIT, CODE, READONLY                                                     
	       ENTRY                           ; Mark first instruction to execute 
		
	;set the bit ,enable the add mapped to the ssram
	;LDR		RTA, =0X1000000C
	;LDR		RTB, =0X00000004
	;STR		RTB, [RTA]


	;LDR		RTA, =0X11000010
	;LDR		RTB, =0X0000000b
	;STR		RTB, [RTA]
	
	
	;ldr		RTA, =0x0022000C    	;THE ADD OF MC_CSGBAB   
     	;ldr		RTB, =0x00002800		;have been modified bu willhua	                       
     	;str		RTB, [ RTA ]     
        
 	;ldr		RTA, =0x00220000    	;THE ADD OF MC_CSAB
    	;ldr		RTB, =0x00000477	
    	;str		RTB, [ RTA ]

	;init sp_svc
	ldr		sp, =SP_SVC 
	
	
	;chmod to irq and init sp_irq                                       
	mov		RTA, #0xD2                                                  
	msr		cpsr_cf, RTA                                                
	ldr		sp, =SP_IRQ                                                 
                                                                    
                                                                    
	;chomod to fiq and init sp_fiq                                      
	mov		RTA, #0XD1                                                  
	msr		cpsr_cf, RTA                                                
	ldr		sp, =SP_FIQ                                                 
                                                                    
	;chomod to abt and init sp_ABT                                      
	mov		RTA, #0XD7                                                  
	msr		cpsr_cf, RTA                                                
	ldr		sp, =SP_ABT                                                 
                                                                    
	;chomod to undf and init sp_UNDF                                    
	mov		RTA, #0XDB                                                  
	msr		cpsr_cf, RTA                                                
	ldr		sp, =SP_UND 	                                            
                                                                    
	;CHMOD TO SYS AND INTI SP_SYS                                       
	mov 	RTA, #0xDF		;@all interrupts disabled,                  
	msr		cpsr_cxsf, RTA   ; @SYSTEM mode, @32-bit code mode          
	ldr		sp, =SP_SYS   ;INIT SYS_SP                                  
                                                                    
	;chmod to svc modle                                                 
	mov		RTA, #0XD3                                                  
	msr		cpsr_c, RTA   
	
;*****************************************************************
;	config  intc
;*****************************************************************
   ; ldr		RTA, =INTC_EN		;disable all IRQ interrupts
    ;ldr		RTB, =0X0
    ;str		RTB, [RTA]  
    
   ; ldr		RTA, =INTC_EN_FIQ	;disable all FIQ interrupts
   ; ldr		RTB, =0X0
   ; str		RTB, [RTA]   			;???THE INTC_EN_FIQ IS 4 BITS WIDTH?? DISABLE FIQ
   
   ; ldr		RTA, =INTC_MSK		;mask all interrupts
   ; ldr		RTB, =0XFFFFFFFF
   ; str		RTB, [RTA]
    
   ; ldr		RTA, =INTC_PLV		;set the hightest plevel
   ; ldr		RTB, =15
   ; str		RTB, [RTA]
   
;****************************************************************
; 	init the EMI and get the memory space
;****************************************************************
	
  
  
  ldr		RTA, =0x11000004    ;THE ADD OF EMI_CSGBAB   
  ldr		RTB, =0x24002000	                       
  str		RTB, [ RTA ]     
 
 
  ldr		RTA, =0x11000008    ;THE ADD OF EMI_CSGBCD   
  ldr		RTB, =0x2c002800	                       
  str		RTB, [ RTA ]     
 
  ldr		RTA, =0x1100000c    ;THE ADD OF EMI_CSGBEF   
  ldr		RTB, =0x34003000	                       
  str		RTB, [ RTA ]     
    
                              
  ldr		RTA, =0x11000000        ;THE ADD OF EMIADDR_SMCONF
  ldr		RTB, =0x9b0133ff	
  str		RTB, [ RTA ]
  
  ldr		RTA, =0x11000014        ;THE ADD OF EMIADDR_SMCONF1
  ldr		RTB, =0x0110a077	
  str		RTB, [ RTA ]
  
  ldr		RTA, =0x11000018        ;THE ADD OF EMIADDR_SMCONF2
  ldr		RTB, =0x80000500	
  str		RTB, [ RTA ]
  
  ldr		RTA, =0x11000010        ;REMAP 0 ADDRESS TO SDRAM 
  ldr		RTB, =0x0b	
  str		RTB, [ RTA ]
    
	
;***************************************************************
;    	enable CPSR IRQ bit
;***************************************************************
  	mrs		RTA, cpsr
	bic		RTA, RTA, #0x80  		;set bit7 to zero
	msr		cpsr_c, RTA     

	
	
	IMPORT	__main
	
	B	__main
	
	END