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Update IRQ handler code.

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This commit is contained in:
Richard Barry 2008-11-28 16:07:27 +00:00
parent 151e000be0
commit 46d4beaba8
1 changed files with 0 additions and 31 deletions
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31
Demo/Common/drivers/Atmel/at91lib/boards/at91sam9xe-ek/board_cstartup_iar.s
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@ -127,37 +127,6 @@ irqHandler:
portRESTORE_CONTEXT portRESTORE_CONTEXT
/* Won't progress to here. */
/* Save interrupt context on the stack to allow nesting */
SUB lr, lr, #4
STMFD sp!, {lr}
MRS lr, SPSR
STMFD sp!, {r0, lr}
/* Write in the IVR to support Protect Mode */
LDR lr, =AT91C_BASE_AIC
LDR r0, [r14, #AIC_IVR]
STR lr, [r14, #AIC_IVR]
/* Branch to interrupt handler in Supervisor mode */
MSR CPSR_c, #ARM_MODE_SVC
STMFD sp!, {r1-r3, r12, lr}
MOV lr, pc
BX r0
LDMIA sp!, {r1-r3, r12, lr}
MSR CPSR_c, #ARM_MODE_IRQ | I_BIT
/* Acknowledge interrupt */
LDR lr, =AT91C_BASE_AIC
STR lr, [r14, #AIC_EOICR]
/* Restore interrupt context and branch back to calling code */
LDMIA sp!, {r0, lr}
MSR SPSR_cxsf, lr
LDMIA sp!, {pc}^
/* /*
After a reset, execution starts here, the mode is ARM, supervisor After a reset, execution starts here, the mode is ARM, supervisor
with interrupts disabled. with interrupts disabled.