irq.c (7306e83ccf5ce3a324546d274945ec1981d78f9a) irq.c (ed1cd6deb013a11959d17a94e35ce159197632da)
1/*
2 * Derived from arch/i386/kernel/irq.c
3 * Copyright (C) 1992 Linus Torvalds
4 * Adapted from arch/i386 by Gary Thomas
5 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
6 * Updated and modified by Cort Dougan <cort@fsmlabs.com>
7 * Copyright (C) 1996-2001 Cort Dougan
8 * Adapted for Power Macintosh by Paul Mackerras

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668 sirqtp = softirq_ctx[raw_smp_processor_id()];
669
670 /* Already there ? */
671 if (unlikely(curtp == irqtp || curtp == sirqtp)) {
672 __do_irq(regs);
673 set_irq_regs(old_regs);
674 return;
675 }
1/*
2 * Derived from arch/i386/kernel/irq.c
3 * Copyright (C) 1992 Linus Torvalds
4 * Adapted from arch/i386 by Gary Thomas
5 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
6 * Updated and modified by Cort Dougan <cort@fsmlabs.com>
7 * Copyright (C) 1996-2001 Cort Dougan
8 * Adapted for Power Macintosh by Paul Mackerras

--- 659 unchanged lines hidden (view full) ---

668 sirqtp = softirq_ctx[raw_smp_processor_id()];
669
670 /* Already there ? */
671 if (unlikely(curtp == irqtp || curtp == sirqtp)) {
672 __do_irq(regs);
673 set_irq_regs(old_regs);
674 return;
675 }
676
677 /* Prepare the thread_info in the irq stack */
678 irqtp->task = curtp->task;
679 irqtp->flags = 0;
680
681 /* Copy the preempt_count so that the [soft]irq checks work. */
682 irqtp->preempt_count = curtp->preempt_count;
683
684 /* Switch stack and call */
685 call_do_irq(regs, irqtp);
686
676 /* Switch stack and call */
677 call_do_irq(regs, irqtp);
678
687 /* Restore stack limit */
688 irqtp->task = NULL;
689
690 /* Copy back updates to the thread_info */
691 if (irqtp->flags)
692 set_bits(irqtp->flags, &curtp->flags);
693
694 set_irq_regs(old_regs);
695}
696
697void __init init_IRQ(void)
698{
699 if (ppc_md.init_IRQ)
700 ppc_md.init_IRQ();
679 set_irq_regs(old_regs);
680}
681
682void __init init_IRQ(void)
683{
684 if (ppc_md.init_IRQ)
685 ppc_md.init_IRQ();
701
702 exc_lvl_ctx_init();
703
704 irq_ctx_init();
705}
706
707#if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
708struct thread_info *critirq_ctx[NR_CPUS] __read_mostly;
709struct thread_info *dbgirq_ctx[NR_CPUS] __read_mostly;
710struct thread_info *mcheckirq_ctx[NR_CPUS] __read_mostly;
686}
687
688#if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
689struct thread_info *critirq_ctx[NR_CPUS] __read_mostly;
690struct thread_info *dbgirq_ctx[NR_CPUS] __read_mostly;
691struct thread_info *mcheckirq_ctx[NR_CPUS] __read_mostly;
711
712void exc_lvl_ctx_init(void)
713{
714 struct thread_info *tp;
715 int i, cpu_nr;
716
717 for_each_possible_cpu(i) {
718#ifdef CONFIG_PPC64
719 cpu_nr = i;
720#else
721#ifdef CONFIG_SMP
722 cpu_nr = get_hard_smp_processor_id(i);
723#else
724 cpu_nr = 0;
725#endif
692#endif
726#endif
727
693
728 tp = critirq_ctx[cpu_nr];
729 tp->cpu = cpu_nr;
730 tp->preempt_count = 0;
731
732#ifdef CONFIG_BOOKE
733 tp = dbgirq_ctx[cpu_nr];
734 tp->cpu = cpu_nr;
735 tp->preempt_count = 0;
736
737 tp = mcheckirq_ctx[cpu_nr];
738 tp->cpu = cpu_nr;
739 tp->preempt_count = HARDIRQ_OFFSET;
740#endif
741 }
742}
743#endif
744
745struct thread_info *softirq_ctx[NR_CPUS] __read_mostly;
746struct thread_info *hardirq_ctx[NR_CPUS] __read_mostly;
747
694struct thread_info *softirq_ctx[NR_CPUS] __read_mostly;
695struct thread_info *hardirq_ctx[NR_CPUS] __read_mostly;
696
748void irq_ctx_init(void)
749{
750 struct thread_info *tp;
751 int i;
752
753 for_each_possible_cpu(i) {
754 tp = softirq_ctx[i];
755 tp->cpu = i;
756 klp_init_thread_info(tp);
757
758 tp = hardirq_ctx[i];
759 tp->cpu = i;
760 klp_init_thread_info(tp);
761 }
762}
763
764void do_softirq_own_stack(void)
765{
697void do_softirq_own_stack(void)
698{
766 struct thread_info *curtp, *irqtp;
699 struct thread_info *irqtp;
767
700
768 curtp = current_thread_info();
769 irqtp = softirq_ctx[smp_processor_id()];
701 irqtp = softirq_ctx[smp_processor_id()];
770 irqtp->task = curtp->task;
771 irqtp->flags = 0;
772 call_do_softirq(irqtp);
702 call_do_softirq(irqtp);
773 irqtp->task = NULL;
774
775 /* Set any flag that may have been set on the
776 * alternate stack
777 */
778 if (irqtp->flags)
779 set_bits(irqtp->flags, &curtp->flags);
780}
781
782irq_hw_number_t virq_to_hw(unsigned int virq)
783{
784 struct irq_data *irq_data = irq_get_irq_data(virq);
785 return WARN_ON(!irq_data) ? 0 : irq_data->hwirq;
786}
787EXPORT_SYMBOL_GPL(virq_to_hw);

--- 46 unchanged lines hidden --- 		703}
704
705irq_hw_number_t virq_to_hw(unsigned int virq)
706{
707 struct irq_data *irq_data = irq_get_irq_data(virq);
708 return WARN_ON(!irq_data) ? 0 : irq_data->hwirq;
709}
710EXPORT_SYMBOL_GPL(virq_to_hw);

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