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ADSP-BF51x L1 allocations

    
		

			

									
					    Nathaniel_ALO
					
							


			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jul 8, 2016 
				
			
			
		
    
		
     
				
		
    
		    		    
		    
		    	
			
    Tools: CCES 2.2.0, ADSP-BF518F EZBOARD
    On the ADSP- B51x can an L1 data bank(ex. B) be allocated for instruction or can an instruction bank be allocated for data? Perhaps a modification to the LDF file?
    
 
    If so, what are the ramifications?
    
 
    Is there bus contention?
    
 
    Can all(except scratch) of L1 be allocated to either code exclusively of data exclusively? This assumes there is an external allocation for the other one. 
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 Audio Signal Processors
                
                                                    
                 l1
                
                                                    
                 cces 2.2.0
                
                                                    
                 adsp-bf51x
                
                                                    
                 Blackfin Embedded Processors
                
                                        
                                            
                
                
                                
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                on Jul 15, 2016 7:35 PM
            

            
					
        
	
        

		
		
        
					
        After more testing I received an access violation when I tried to access code from the 0xFF90 000 memory region aka Data Bank B.
        
 
        It appears I am able to store code there, but the proc. still thinks the region is for data. This means that trying to access the code results in a fault unless there is way to tell the proc. that its code.
        
 
        A non-recoverable error or exception has occurred.
        
 
          Description:   Illegal instruction fetch access (memory protection violation) (Exception with EXCAUSE=0x2B).
        
 
          General Type:  UnhandledException
        
 
          Specific Type: InstructionFetchViolation
        
 
          Error PC:      0xff900000
        
 
        Thanks,
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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													0
							
			
				
									
							        
			
			
			
          
            
						
                            
            
            				
            
                on Jul 15, 2016 7:35 PM
            

            
					
          
	
          

		
		
          
					
          After more testing I received an access violation when I tried to access code from the 0xFF90 000 memory region aka Data Bank B.
          
 
          It appears I am able to store code there, but the proc. still thinks the region is for data. This means that trying to access the code results in a fault unless there is way to tell the proc. that its code.
          
 
          A non-recoverable error or exception has occurred.
          
 
            Description:   Illegal instruction fetch access (memory protection violation) (Exception with EXCAUSE=0x2B).
          
 
            General Type:  UnhandledException
          
 
            Specific Type: InstructionFetchViolation
          
 
            Error PC:      0xff900000
          
 
          Thanks,
          
			
          

		
			
	      

		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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