69 lines
1.4 KiB
ArmAsm
69 lines
1.4 KiB
ArmAsm
#******************************************************************************
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#* Copyright (c) 2015, Insyde Software Corporation. All Rights Reserved.
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#*
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#* You may not reproduce, distribute, publish, display, perform, modify, adapt,
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#* transmit, broadcast, present, recite, release, license or otherwise exploit
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#* any part of this publication in any form, by any means, without the prior
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#* written permission of Insyde Software Corporation.
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#*
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#******************************************************************************
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.data
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TimerCallbackFunctionPtr: .space 4
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.text
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ASM_GLOBAL ASM_PFX(InitializeTimerCallbackPtr)
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ASM_PFX(InitializeTimerCallbackPtr):
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pushl %ebp # C prolog
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movl %esp, %ebp
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movl 8(%ebp), %eax # Get ExternalVectorTable Address
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movl %eax, ExternalVectorTablePtr
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popl %ebp
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ret
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#
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#---------------------------------------#
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# InterruptEntry #
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#---------------------------------------#
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# IRQ0 interrupt serivce routine.
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#
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ASM_GLOBAL ASM_PFX(InterruptEntry)
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ASM_PFX(InterruptEntry):
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cli
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pushl %esp
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pushl %ebp
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pushl %eax
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pushl %ebx
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pushl %ecx
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pushl %edx
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pushl %esi
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pushl %edi
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#
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# 8259 IRQ0 EOI
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#
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movb $0x20, %al
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outb %al, $0x20
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movl TimerCallbackFunctionPtr, %eax
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call *%eax
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cli
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popl %edi
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popl %esi
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popl %edx
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popl %ecx
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popl %ebx
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popl %eax
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popl %ebp
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popl %esp
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iretl
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