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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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2be6bb0c79
This splits up the sh intc core in to something more vaguely resembling a subsystem. Most of the functionality was alread fairly well compartmentalized, and there were only a handful of interdependencies that needed to be resolved in the process. This also serves as future-proofing for the genirq and sparseirq rework, which will make some of the split out functionality wholly generic, allowing things to be killed off in place with minimal migration pain. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
135 lines
3.2 KiB
C
135 lines
3.2 KiB
C
#ifndef __SH_INTC_H
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#define __SH_INTC_H
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#include <linux/ioport.h>
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typedef unsigned char intc_enum;
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struct intc_vect {
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intc_enum enum_id;
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unsigned short vect;
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};
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#define INTC_VECT(enum_id, vect) { enum_id, vect }
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#define INTC_IRQ(enum_id, irq) INTC_VECT(enum_id, irq2evt(irq))
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struct intc_group {
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intc_enum enum_id;
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intc_enum enum_ids[32];
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};
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#define INTC_GROUP(enum_id, ids...) { enum_id, { ids } }
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struct intc_subgroup {
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unsigned long reg, reg_width;
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intc_enum parent_id;
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intc_enum enum_ids[32];
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};
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struct intc_mask_reg {
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unsigned long set_reg, clr_reg, reg_width;
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intc_enum enum_ids[32];
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#ifdef CONFIG_INTC_BALANCING
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unsigned long dist_reg;
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#endif
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#ifdef CONFIG_SMP
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unsigned long smp;
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#endif
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};
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struct intc_prio_reg {
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unsigned long set_reg, clr_reg, reg_width, field_width;
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intc_enum enum_ids[16];
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#ifdef CONFIG_SMP
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unsigned long smp;
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#endif
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};
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struct intc_sense_reg {
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unsigned long reg, reg_width, field_width;
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intc_enum enum_ids[16];
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};
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#ifdef CONFIG_INTC_BALANCING
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#define INTC_SMP_BALANCING(reg) .dist_reg = (reg)
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#else
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#define INTC_SMP_BALANCING(reg)
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#endif
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#ifdef CONFIG_SMP
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#define INTC_SMP(stride, nr) .smp = (stride) | ((nr) << 8)
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#else
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#define INTC_SMP(stride, nr)
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#endif
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struct intc_hw_desc {
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struct intc_vect *vectors;
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unsigned int nr_vectors;
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struct intc_group *groups;
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unsigned int nr_groups;
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struct intc_mask_reg *mask_regs;
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unsigned int nr_mask_regs;
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struct intc_prio_reg *prio_regs;
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unsigned int nr_prio_regs;
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struct intc_sense_reg *sense_regs;
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unsigned int nr_sense_regs;
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struct intc_mask_reg *ack_regs;
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unsigned int nr_ack_regs;
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struct intc_subgroup *subgroups;
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unsigned int nr_subgroups;
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};
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#define _INTC_ARRAY(a) a, a == NULL ? 0 : sizeof(a)/sizeof(*a)
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#define INTC_HW_DESC(vectors, groups, mask_regs, \
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prio_regs, sense_regs, ack_regs) \
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{ \
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_INTC_ARRAY(vectors), _INTC_ARRAY(groups), \
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_INTC_ARRAY(mask_regs), _INTC_ARRAY(prio_regs), \
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_INTC_ARRAY(sense_regs), _INTC_ARRAY(ack_regs), \
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}
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struct intc_desc {
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char *name;
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struct resource *resource;
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unsigned int num_resources;
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intc_enum force_enable;
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intc_enum force_disable;
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struct intc_hw_desc hw;
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};
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#define DECLARE_INTC_DESC(symbol, chipname, vectors, groups, \
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mask_regs, prio_regs, sense_regs) \
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struct intc_desc symbol __initdata = { \
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.name = chipname, \
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.hw = INTC_HW_DESC(vectors, groups, mask_regs, \
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prio_regs, sense_regs, NULL), \
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}
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#define DECLARE_INTC_DESC_ACK(symbol, chipname, vectors, groups, \
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mask_regs, prio_regs, sense_regs, ack_regs) \
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struct intc_desc symbol __initdata = { \
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.name = chipname, \
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.hw = INTC_HW_DESC(vectors, groups, mask_regs, \
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prio_regs, sense_regs, ack_regs), \
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}
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int register_intc_controller(struct intc_desc *desc);
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void reserve_intc_vectors(struct intc_vect *vectors, unsigned int nr_vecs);
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int intc_set_priority(unsigned int irq, unsigned int prio);
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int intc_irq_lookup(const char *chipname, intc_enum enum_id);
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void intc_finalize(void);
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#ifdef CONFIG_INTC_USERIMASK
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int register_intc_userimask(unsigned long addr);
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#else
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static inline int register_intc_userimask(unsigned long addr)
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{
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return 0;
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}
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#endif
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int reserve_irq_vector(unsigned int irq);
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void reserve_irq_legacy(void);
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#endif /* __SH_INTC_H */
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