irq_irq0.s

来自「AT91M42800A的bootloader源代码」· S 代码 · 共 48 行

;------------------------------------------------------------------------------
;-         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_irq0.arm
;- Object               : Assembler IRQ0 Interrupt Handler.
;-
;- 1.0 18/11/02 JPP     : Creation
;------------------------------------------------------------------------------

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

		INCLUDE		include/AT91M42800A.inc

    INCLUDE   irq_arm.mac

;------------------------------------------------------------------------------
;- Function             : irq0_asm_irq_handler
;- Treatments           : IRQ0 Controller Interrupt Handler.
;- Called Functions     : at91_IRQ0_handler
;- Called Macros        : IRQ_ENTRY, IRQ_EXIT
;------------------------------------------------------------------------------
	EXPORT irq0_asm_irq_handler
	IMPORT at91_IRQ0_handler

irq0_asm_irq_handler

;- Manage Exception Entry
        IRQ_ENTRY
;- Call the PIO Interrupt C handler
            ldr         r0, =at91_IRQ0_handler
            mov         r14, pc
            bx          r0
;- Irq exit
exit_irq
;- Manage Exception Exit
        IRQ_EXIT
    END