irq_spu.paf.arm

ARM入门的好帮手.包含了从简单到相对较复杂的程序.

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;.section ".AT91Lib","ax" 
;.AT91Lib
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#define AIC_PRIOR                            0x07    
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#define AIC_SRCTYPE                          0x60    
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#define AIC_SRCTYPE_INT_LEVEL_SENSITIVE      0x00    
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#define AIC_SRCTYPE_INT_EDGE_TRIGGERED       0x20    
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#define AIC_SRCTYPE_EXT_LOW_LEVEL            0x00    
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#define AIC_SRCTYPE_EXT_NEGATIVE_EDGE        0x20    
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#define AIC_SRCTYPE_EXT_HIGH_LEVEL           0x40    
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#define AIC_SRCTYPE_EXT_POSITIVE_EDGE        0x60    
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#define AIC_IRQID                    0x1F            
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#define AIC_NFIQ                     0x01            
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#define AIC_NIRQ                     0x02            
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#define AIC_BASE                     0xFFFFF000
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	/*END*/
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            EXPORT      at91_spurious_handler
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at91_spurious_handler
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            sub         r14, r14, 4                
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            stmdb       r13!, {r14}                 
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            ldr         r14, =AIC_BASE              
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            str         r14, [r14, 0x130]
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            ldmia       r13!, {pc}^                 
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            /*END*/
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