mirror of
https://github.com/d0k3/GodMode9.git
synced 2025-06-26 05:32:47 +00:00
2f86686388
- added initial SCU twiddling - added very untested and unusable SMP code - fixed race condition that happened on boot - added initial MMU code (just super basic identity mapping, no caching set up or anything) - enabled some of the fancier ARMv6 features - reorganized ARM11 files into their own folders - possibly more stuff I'm forgetting about
27 lines
635 B
ArmAsm
27 lines
635 B
ArmAsm
#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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