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While using separate IRQ stacks can cut down on stack consumption, many users can also use 4k stacks directly without the additional need of separate stacks for soft and hardirqs. With this split, we support the same rationale for 4KSTACKS as m68knommu, with the IRQSTACKS abstraction as per ppc64. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
#ifndef __ASM_SH_IRQ_H
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#define __ASM_SH_IRQ_H
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#include <asm/machvec.h>
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/*
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* A sane default based on a reasonable vector table size, platforms are
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* advised to cap this at the hard limit that they're interested in
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* through the machvec.
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*/
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#define NR_IRQS 256
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/*
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* Convert back and forth between INTEVT and IRQ values.
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*/
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#ifdef CONFIG_CPU_HAS_INTEVT
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#define evt2irq(evt) (((evt) >> 5) - 16)
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#define irq2evt(irq) (((irq) + 16) << 5)
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#else
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#define evt2irq(evt) (evt)
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#define irq2evt(irq) (irq)
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#endif
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/*
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* Simple Mask Register Support
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*/
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extern void make_maskreg_irq(unsigned int irq);
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extern unsigned short *irq_mask_register;
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/*
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* PINT IRQs
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*/
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void init_IRQ_pint(void);
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void make_imask_irq(unsigned int irq);
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static inline int generic_irq_demux(int irq)
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{
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return irq;
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}
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#define irq_canonicalize(irq) (irq)
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#define irq_demux(irq) sh_mv.mv_irq_demux(irq)
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#ifdef CONFIG_IRQSTACKS
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extern void irq_ctx_init(int cpu);
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extern void irq_ctx_exit(int cpu);
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# define __ARCH_HAS_DO_SOFTIRQ
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#else
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# define irq_ctx_init(cpu) do { } while (0)
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# define irq_ctx_exit(cpu) do { } while (0)
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#endif
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#endif /* __ASM_SH_IRQ_H */
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