irq_sw.s

ARM入门的好帮手.包含了从简单到相对较复杂的程序.

;------------------------------------------------------------------------------
;-         ATMEL Microcontroller Software Support  -  ROUSSET  -
;------------------------------------------------------------------------------
; The software is delivered "AS IS" without warranty or condition of any
; kind, either express, implied or statutory. This includes without
; limitation any warranty or condition with respect to merchantability or
; fitness for any particular purpose, or against the infringements of
; intellectual property rights of others.
;------------------------------------------------------------------------------
;- File source          : irq_sw.s
;- Object               : Assembler software Interrupt Handler.
;-
;- 1.0 14/Feb/03 JPP     : Creation
;------------------------------------------------------------------------------

;------------------------------------------------------------------------------
;- Area Definition
;------------------------------------------------------------------------------
	AREA        itHandler, CODE, READONLY

    INCLUDE   include/AT91R40008.inc

    INCLUDE   irq_arm.mac

;------------------------------------------------------------------------------
;- Function             : sw_asm_irq_handler
;- Treatments           : software Controller Interrupt Handler.
;- Called Functions     : aic_software_interrupt
;- Called Macros        : IRQ_ENTRY, IRQ_EXIT
;------------------------------------------------------------------------------
	EXPORT sw_asm_irq_handler
	IMPORT aic_software_interrupt
sw_asm_irq_handler

;- Manage Exception Entry
        IRQ_ENTRY
;- Call the PIO Interrupt C handler
            ldr         r0, =aic_software_interrupt
            mov         r14, pc
            bx          r0
;- Irq exit
;- Manage Exception Exit
        IRQ_EXIT

    END