root/include/linux/sh_intc.h

DEFINITIONS

1. register_intc_userimask

#ifndef __SH_INTC_H
#define __SH_INTC_H

#include <linux/ioport.h>

#ifdef CONFIG_SUPERH
#define INTC_NR_IRQS    512
#else
#define INTC_NR_IRQS    1024
#endif

/*
 * Convert back and forth between INTEVT and IRQ values.
 */
#ifdef CONFIG_CPU_HAS_INTEVT
#define evt2irq(evt)            (((evt) >> 5) - 16)
#define irq2evt(irq)            (((irq) + 16) << 5)
#else
#define evt2irq(evt)            (evt)
#define irq2evt(irq)            (irq)
#endif

typedef unsigned char intc_enum;

struct intc_vect {
        intc_enum enum_id;
        unsigned short vect;
};

#define INTC_VECT(enum_id, vect) { enum_id, vect }
#define INTC_IRQ(enum_id, irq) INTC_VECT(enum_id, irq2evt(irq))

struct intc_group {
        intc_enum enum_id;
        intc_enum enum_ids[32];
};

#define INTC_GROUP(enum_id, ids...) { enum_id, { ids } }

struct intc_subgroup {
        unsigned long reg, reg_width;
        intc_enum parent_id;
        intc_enum enum_ids[32];
};

struct intc_mask_reg {
        unsigned long set_reg, clr_reg, reg_width;
        intc_enum enum_ids[32];
#ifdef CONFIG_INTC_BALANCING
        unsigned long dist_reg;
#endif
#ifdef CONFIG_SMP
        unsigned long smp;
#endif
};

struct intc_prio_reg {
        unsigned long set_reg, clr_reg, reg_width, field_width;
        intc_enum enum_ids[16];
#ifdef CONFIG_SMP
        unsigned long smp;
#endif
};

struct intc_sense_reg {
        unsigned long reg, reg_width, field_width;
        intc_enum enum_ids[16];
};

#ifdef CONFIG_INTC_BALANCING
#define INTC_SMP_BALANCING(reg) .dist_reg = (reg)
#else
#define INTC_SMP_BALANCING(reg)
#endif

#ifdef CONFIG_SMP
#define INTC_SMP(stride, nr)    .smp = (stride) | ((nr) << 8)
#else
#define INTC_SMP(stride, nr)
#endif

struct intc_hw_desc {
        struct intc_vect *vectors;
        unsigned int nr_vectors;
        struct intc_group *groups;
        unsigned int nr_groups;
        struct intc_mask_reg *mask_regs;
        unsigned int nr_mask_regs;
        struct intc_prio_reg *prio_regs;
        unsigned int nr_prio_regs;
        struct intc_sense_reg *sense_regs;
        unsigned int nr_sense_regs;
        struct intc_mask_reg *ack_regs;
        unsigned int nr_ack_regs;
        struct intc_subgroup *subgroups;
        unsigned int nr_subgroups;
};

#define _INTC_ARRAY(a) a, __same_type(a, NULL) ? 0 : sizeof(a)/sizeof(*a)

#define INTC_HW_DESC(vectors, groups, mask_regs,        \
                     prio_regs, sense_regs, ack_regs)   \
{                                                       \
        _INTC_ARRAY(vectors), _INTC_ARRAY(groups),      \
        _INTC_ARRAY(mask_regs), _INTC_ARRAY(prio_regs), \
        _INTC_ARRAY(sense_regs), _INTC_ARRAY(ack_regs), \
}

struct intc_desc {
        char *name;
        struct resource *resource;
        unsigned int num_resources;
        intc_enum force_enable;
        intc_enum force_disable;
        bool skip_syscore_suspend;
        struct intc_hw_desc hw;
};

#define DECLARE_INTC_DESC(symbol, chipname, vectors, groups,            \
        mask_regs, prio_regs, sense_regs)                               \
struct intc_desc symbol __initdata = {                                  \
        .name = chipname,                                               \
        .hw = INTC_HW_DESC(vectors, groups, mask_regs,                  \
                           prio_regs, sense_regs, NULL),                \
}

#define DECLARE_INTC_DESC_ACK(symbol, chipname, vectors, groups,        \
        mask_regs, prio_regs, sense_regs, ack_regs)                     \
struct intc_desc symbol __initdata = {                                  \
        .name = chipname,                                               \
        .hw = INTC_HW_DESC(vectors, groups, mask_regs,                  \
                           prio_regs, sense_regs, ack_regs),            \
}

int register_intc_controller(struct intc_desc *desc);
int intc_set_priority(unsigned int irq, unsigned int prio);
int intc_irq_lookup(const char *chipname, intc_enum enum_id);
void intc_finalize(void);

#ifdef CONFIG_INTC_USERIMASK
int register_intc_userimask(unsigned long addr);
#else
static inline int register_intc_userimask(unsigned long addr)
{
        return 0;
}
#endif

#endif /* __SH_INTC_H */