x86: Avoid magic number with ELCR register accesses

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Define PIC_ELCR1 and PIC_ELCR2 macros for accesses to the ELCR registers 
implemented by many chipsets in their embedded 8259A PIC cores, avoiding 
magic numbers that are difficult to handle, and complementing the macros 
we already have for registers originally defined with discrete 8259A PIC 
implementations.  No functional change.

Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/alpine.DEB.2.21.2107200237300.9461@angie.orcam.me.uk

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Maciej W. Rozycki 2021-07-20 05:28:09 +02:00 • committed by Thomas Gleixner

parent 0e8c6f56fa

commit d253166168

7 changed files with 15 additions and 11 deletions

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2

arch/x86/include/asm/i8259.h

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arch/x86/kernel/acpi/boot.c

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arch/x86/kernel/apic/io_apic.c

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arch/x86/kernel/apic/vector.c

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arch/x86/kernel/i8259.c

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arch/x86/kernel/mpparse.c

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arch/x86/pci/irq.c

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