forked from luck/tmp_suning_uos_patched
dc825b1790
This implements support for hardware-managed IRQ balancing as implemented by SH-X3 cores (presently only hooked up for SH7786, but can probably be carried over to other SH-X3 cores, too). CPUs need to specify their distribution register along with the mask definitions, as these follow the same format. Peripheral IRQs that don't opt out of balancing will be automatically distributed at the whim of the hardware block, while each CPU needs to verify whether it is handling the IRQ or not, especially before clearing the mask. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
78 lines
1.8 KiB
C
78 lines
1.8 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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#define NR_IRQS_LEGACY 8 /* Legacy external IRQ0-7 */
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/*
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* This is a special IRQ number for indicating that no IRQ has been
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* triggered and to simply ignore the IRQ dispatch. This is a special
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* case that can happen with IRQ auto-distribution when multiple CPUs
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* are woken up and signalled in parallel.
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*/
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#define NO_IRQ_IGNORE ((unsigned int)-1)
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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_demux(irq) sh_mv.mv_irq_demux(irq)
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void init_IRQ(void);
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asmlinkage int do_IRQ(unsigned int irq, struct pt_regs *regs);
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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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#ifdef CONFIG_INTC_BALANCING
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extern unsigned int irq_lookup(unsigned int irq);
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extern void irq_finish(unsigned int irq);
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#else
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#define irq_lookup(irq) (irq)
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#define irq_finish(irq) do { } while (0)
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#endif
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#include <asm-generic/irq.h>
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#ifdef CONFIG_CPU_SH5
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#include <cpu/irq.h>
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#endif
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#endif /* __ASM_SH_IRQ_H */
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