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    Subject[PATCH V2 10/19] csky: IRQ handling
    Date
    Signed-off-by: Guo Ren <ren_guo@c-sky.com>
    ---
    arch/csky/include/asm/irq.h | 10 ++++++++
    arch/csky/include/asm/irqflags.h | 49 ++++++++++++++++++++++++++++++++++++++++
    arch/csky/kernel/irq.c | 31 +++++++++++++++++++++++++
    3 files changed, 90 insertions(+)
    create mode 100644 arch/csky/include/asm/irq.h
    create mode 100644 arch/csky/include/asm/irqflags.h
    create mode 100644 arch/csky/kernel/irq.c

    diff --git a/arch/csky/include/asm/irq.h b/arch/csky/include/asm/irq.h
    new file mode 100644
    index 0000000..9390cb0
    --- /dev/null
    +++ b/arch/csky/include/asm/irq.h
    @@ -0,0 +1,10 @@
    +// SPDX-License-Identifier: GPL-2.0
    +// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
    +#ifndef __ASM_CSKY_IRQ_H
    +#define __ASM_CSKY_IRQ_H
    +
    +#include <asm-generic/irq.h>
    +
    +extern void set_handle_irq(void (*handle_irq)(struct pt_regs *));
    +
    +#endif /* __ASM_CSKY_IRQ_H */
    diff --git a/arch/csky/include/asm/irqflags.h b/arch/csky/include/asm/irqflags.h
    new file mode 100644
    index 0000000..5216ec0
    --- /dev/null
    +++ b/arch/csky/include/asm/irqflags.h
    @@ -0,0 +1,49 @@
    +// SPDX-License-Identifier: GPL-2.0
    +// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
    +#ifndef __ASM_CSKY_IRQFLAGS_H
    +#define __ASM_CSKY_IRQFLAGS_H
    +#include <abi/reg_ops.h>
    +
    +static inline unsigned long arch_local_irq_save(void)
    +{
    + unsigned long flags;
    +
    + flags = mfcr("psr");
    + asm volatile("psrclr ie\n");
    + return flags;
    +}
    +#define arch_local_irq_save arch_local_irq_save
    +
    +static inline void arch_local_irq_enable(void)
    +{
    + asm volatile("psrset ee, ie\n");
    +}
    +#define arch_local_irq_enable arch_local_irq_enable
    +
    +static inline void arch_local_irq_disable(void)
    +{
    + asm volatile("psrclr ie\n");
    +}
    +#define arch_local_irq_disable arch_local_irq_disable
    +
    +static inline unsigned long arch_local_save_flags(void)
    +{
    + return mfcr("psr");
    +}
    +#define arch_local_save_flags arch_local_save_flags
    +
    +static inline void arch_local_irq_restore(unsigned long flags)
    +{
    + mtcr("psr", flags);
    +}
    +#define arch_local_irq_restore arch_local_irq_restore
    +
    +static inline int arch_irqs_disabled_flags(unsigned long flags)
    +{
    + return !(flags & (1<<6));
    +}
    +#define arch_irqs_disabled_flags arch_irqs_disabled_flags
    +
    +#include <asm-generic/irqflags.h>
    +
    +#endif /* __ASM_CSKY_IRQFLAGS_H */
    diff --git a/arch/csky/kernel/irq.c b/arch/csky/kernel/irq.c
    new file mode 100644
    index 0000000..ef2600d
    --- /dev/null
    +++ b/arch/csky/kernel/irq.c
    @@ -0,0 +1,31 @@
    +// SPDX-License-Identifier: GPL-2.0
    +// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
    +#include <linux/init.h>
    +#include <linux/interrupt.h>
    +#include <linux/irq.h>
    +#include <linux/irqchip.h>
    +#include <asm/traps.h>
    +#include <asm/smp.h>
    +
    +static void (*handle_arch_irq)(struct pt_regs *regs) = NULL;
    +
    +void __init set_handle_irq(void (*handle_irq)(struct pt_regs *))
    +{
    + if (handle_arch_irq)
    + return;
    +
    + handle_arch_irq = handle_irq;
    +}
    +
    +void __init init_IRQ(void)
    +{
    + irqchip_init();
    +#ifdef CONFIG_SMP
    + setup_smp_ipi();
    +#endif
    +}
    +
    +asmlinkage void __irq_entry csky_do_IRQ(struct pt_regs *regs)
    +{
    + handle_arch_irq(regs);
    +}
    --
    2.7.4
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