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Aurelien Jacquiotec500af2011-10-04 11:06:27 -04001/*
2 * Port on Texas Instruments TMS320C6x architecture
3 *
4 * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
5 * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
6 *
7 * Large parts taken directly from powerpc.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13#ifndef _ASM_C6X_IRQ_H
14#define _ASM_C6X_IRQ_H
15
Mark Salter0bd761e2012-01-26 09:26:21 -050016#include <linux/irqdomain.h>
Aurelien Jacquiotec500af2011-10-04 11:06:27 -040017#include <linux/threads.h>
18#include <linux/list.h>
19#include <linux/radix-tree.h>
20#include <asm/percpu.h>
21
22#define irq_canonicalize(irq) (irq)
23
24/*
25 * The C64X+ core has 16 IRQ vectors. One each is used by Reset and NMI. Two
26 * are reserved. The remaining 12 vectors are used to route SoC interrupts.
27 * These interrupt vectors are prioritized with IRQ 4 having the highest
28 * priority and IRQ 15 having the lowest.
29 *
30 * The C64x+ megamodule provides a PIC which combines SoC IRQ sources into a
31 * single core IRQ vector. There are four combined sources, each of which
32 * feed into one of the 12 general interrupt vectors. The remaining 8 vectors
33 * can each route a single SoC interrupt directly.
34 */
35#define NR_PRIORITY_IRQS 16
36
37#define NR_IRQS_LEGACY NR_PRIORITY_IRQS
38
39/* Total number of virq in the platform */
40#define NR_IRQS 256
41
42/* This number is used when no interrupt has been assigned */
43#define NO_IRQ 0
44
Aurelien Jacquiotec500af2011-10-04 11:06:27 -040045struct irq_data;
46extern irq_hw_number_t irqd_to_hwirq(struct irq_data *d);
47extern irq_hw_number_t virq_to_hw(unsigned int virq);
Aurelien Jacquiotec500af2011-10-04 11:06:27 -040048
49extern void __init init_pic_c64xplus(void);
50
51extern void init_IRQ(void);
52
53struct pt_regs;
54
55extern asmlinkage void c6x_do_IRQ(unsigned int prio, struct pt_regs *regs);
56
57extern unsigned long irq_err_count;
58
59#endif /* _ASM_C6X_IRQ_H */