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https://github.com/edk2-porting/linux-next.git
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45b9deaf14
Different CPUs will have different starting vectors, with varying amounts of reserved or unusable vector space prior to the first slot. This introduces a legacy vector reservation system that inserts itself in between the CPU vector map registration and the platform specific IRQ setup. This works fine in practice as the only new vectors that boards need to establish on their own should be dynamically allocated rather than arbitrarily assigned. As a plus, this also makes all of the converted platforms sparseirq ready. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
#ifndef __SH_INTC_H
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#define __SH_INTC_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_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_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_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_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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char *name;
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struct intc_mask_reg *ack_regs;
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unsigned int nr_ack_regs;
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};
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#define _INTC_ARRAY(a) a, sizeof(a)/sizeof(*a)
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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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_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), \
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chipname, \
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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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_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), \
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chipname, \
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_INTC_ARRAY(ack_regs), \
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}
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void __init register_intc_controller(struct intc_desc *desc);
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int intc_set_priority(unsigned int irq, unsigned int prio);
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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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