forked from Mirror/GodMode9
27 lines
635 B
ArmAsm
27 lines
635 B
ArmAsm
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#include <arm.h>
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.arm
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.section .text
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.align 2
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@ temporarily use dumb vectors redirected from the bootrom, rather
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@ than MMU-mapped pages
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.global irq_vector
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.type irq_vector, %function
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irq_vector:
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sub lr, lr, #4 @ Fix return address
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srsfd sp!, #SR_SVC_MODE @ Store IRQ mode LR and SPSR on the SVC stack
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cps #SR_SVC_MODE @ Switch to SVC mode
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push {r0-r4, r12, lr} @ Preserve registers
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and r4, sp, #7 @ Fix SP to be 8byte aligned
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sub sp, sp, r4
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bl GIC_MainHandler
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add sp, sp, r4
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pop {r0-r4, r12, lr}
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rfeia sp! @ Return from exception
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