1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ASM_IA64_IOSAPIC_H
3#define __ASM_IA64_IOSAPIC_H
4
5#define	IOSAPIC_REG_SELECT	0x0
6#define	IOSAPIC_WINDOW		0x10
7#define	IOSAPIC_EOI		0x40
8
9#define	IOSAPIC_VERSION		0x1
10
11/*
12 * Redirection table entry
13 */
14#define	IOSAPIC_RTE_LOW(i)	(0x10+i*2)
15#define	IOSAPIC_RTE_HIGH(i)	(0x11+i*2)
16
17#define	IOSAPIC_DEST_SHIFT		16
18
19/*
20 * Delivery mode
21 */
22#define	IOSAPIC_DELIVERY_SHIFT		8
23#define	IOSAPIC_FIXED			0x0
24#define	IOSAPIC_LOWEST_PRIORITY	0x1
25#define	IOSAPIC_PMI			0x2
26#define	IOSAPIC_NMI			0x4
27#define	IOSAPIC_INIT			0x5
28#define	IOSAPIC_EXTINT			0x7
29
30/*
31 * Interrupt polarity
32 */
33#define	IOSAPIC_POLARITY_SHIFT		13
34#define	IOSAPIC_POL_HIGH		0
35#define	IOSAPIC_POL_LOW		1
36
37/*
38 * Trigger mode
39 */
40#define	IOSAPIC_TRIGGER_SHIFT		15
41#define	IOSAPIC_EDGE			0
42#define	IOSAPIC_LEVEL			1
43
44/*
45 * Mask bit
46 */
47
48#define	IOSAPIC_MASK_SHIFT		16
49#define	IOSAPIC_MASK			(1<<IOSAPIC_MASK_SHIFT)
50
51#define IOSAPIC_VECTOR_MASK		0xffffff00
52
53#ifndef __ASSEMBLY__
54
55#define NR_IOSAPICS			256
56
57#define iosapic_pcat_compat_init	ia64_native_iosapic_pcat_compat_init
58#define __iosapic_read			__ia64_native_iosapic_read
59#define __iosapic_write			__ia64_native_iosapic_write
60#define iosapic_get_irq_chip		ia64_native_iosapic_get_irq_chip
61
62extern void __init ia64_native_iosapic_pcat_compat_init(void);
63extern struct irq_chip *ia64_native_iosapic_get_irq_chip(unsigned long trigger);
64
65static inline unsigned int
66__ia64_native_iosapic_read(char __iomem *iosapic, unsigned int reg)
67{
68	writel(reg, iosapic + IOSAPIC_REG_SELECT);
69	return readl(iosapic + IOSAPIC_WINDOW);
70}
71
72static inline void
73__ia64_native_iosapic_write(char __iomem *iosapic, unsigned int reg, u32 val)
74{
75	writel(reg, iosapic + IOSAPIC_REG_SELECT);
76	writel(val, iosapic + IOSAPIC_WINDOW);
77}
78
79static inline void iosapic_eoi(char __iomem *iosapic, u32 vector)
80{
81	writel(vector, iosapic + IOSAPIC_EOI);
82}
83
84extern void __init iosapic_system_init (int pcat_compat);
85extern int iosapic_init (unsigned long address, unsigned int gsi_base);
86extern int iosapic_remove (unsigned int gsi_base);
87extern int gsi_to_irq (unsigned int gsi);
88extern int iosapic_register_intr (unsigned int gsi, unsigned long polarity,
89				  unsigned long trigger);
90extern void iosapic_unregister_intr (unsigned int irq);
91extern void iosapic_override_isa_irq (unsigned int isa_irq, unsigned int gsi,
92				      unsigned long polarity,
93				      unsigned long trigger);
94extern int __init iosapic_register_platform_intr (u32 int_type,
95					   unsigned int gsi,
96					   int pmi_vector,
97					   u16 eid, u16 id,
98					   unsigned long polarity,
99					   unsigned long trigger);
100
101#ifdef CONFIG_NUMA
102extern void map_iosapic_to_node (unsigned int, int);
103#endif
104
105# endif /* !__ASSEMBLY__ */
106#endif /* __ASM_IA64_IOSAPIC_H */
107