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7#ifndef _XICS_H
8#define _XICS_H
9
10#include <linux/interrupt.h>
11
12#define XICS_IPI 2
13#define XICS_IRQ_SPURIOUS 0
14
15
16#define DEFAULT_PRIORITY 5
17
18
19
20
21
22#define IPI_PRIORITY 4
23
24
25#define LOWEST_PRIORITY 0xFF
26
27
28#define MAX_NUM_PRIORITIES 3
29
30
31#ifdef CONFIG_PPC_ICP_NATIVE
32extern int icp_native_init(void);
33extern void icp_native_flush_interrupt(void);
34extern void icp_native_cause_ipi_rm(int cpu);
35#else
36static inline int icp_native_init(void) { return -ENODEV; }
37#endif
38
39
40#ifdef CONFIG_PPC_ICP_HV
41extern int icp_hv_init(void);
42#else
43static inline int icp_hv_init(void) { return -ENODEV; }
44#endif
45
46#ifdef CONFIG_PPC_POWERNV
47extern int icp_opal_init(void);
48extern void icp_opal_flush_interrupt(void);
49#else
50static inline int icp_opal_init(void) { return -ENODEV; }
51#endif
52
53
54struct icp_ops {
55 unsigned int (*get_irq)(void);
56 void (*eoi)(struct irq_data *d);
57 void (*set_priority)(unsigned char prio);
58 void (*teardown_cpu)(void);
59 void (*flush_ipi)(void);
60#ifdef CONFIG_SMP
61 void (*cause_ipi)(int cpu);
62 irq_handler_t ipi_action;
63#endif
64};
65
66extern const struct icp_ops *icp_ops;
67
68#ifdef CONFIG_PPC_ICS_NATIVE
69
70extern int ics_native_init(void);
71#else
72static inline int ics_native_init(void) { return -ENODEV; }
73#endif
74
75
76#ifdef CONFIG_PPC_ICS_RTAS
77extern int ics_rtas_init(void);
78#else
79static inline int ics_rtas_init(void) { return -ENODEV; }
80#endif
81
82
83#ifdef CONFIG_PPC_POWERNV
84extern int ics_opal_init(void);
85#else
86static inline int ics_opal_init(void) { return -ENODEV; }
87#endif
88
89
90struct ics {
91 struct list_head link;
92 int (*map)(struct ics *ics, unsigned int virq);
93 void (*mask_unknown)(struct ics *ics, unsigned long vec);
94 long (*get_server)(struct ics *ics, unsigned long vec);
95 int (*host_match)(struct ics *ics, struct device_node *node);
96 char data[];
97};
98
99
100extern unsigned int xics_default_server;
101extern unsigned int xics_default_distrib_server;
102extern unsigned int xics_interrupt_server_size;
103extern struct irq_domain *xics_host;
104
105struct xics_cppr {
106 unsigned char stack[MAX_NUM_PRIORITIES];
107 int index;
108};
109
110DECLARE_PER_CPU(struct xics_cppr, xics_cppr);
111
112static inline void xics_push_cppr(unsigned int vec)
113{
114 struct xics_cppr *os_cppr = this_cpu_ptr(&xics_cppr);
115
116 if (WARN_ON(os_cppr->index >= MAX_NUM_PRIORITIES - 1))
117 return;
118
119 if (vec == XICS_IPI)
120 os_cppr->stack[++os_cppr->index] = IPI_PRIORITY;
121 else
122 os_cppr->stack[++os_cppr->index] = DEFAULT_PRIORITY;
123}
124
125static inline unsigned char xics_pop_cppr(void)
126{
127 struct xics_cppr *os_cppr = this_cpu_ptr(&xics_cppr);
128
129 if (WARN_ON(os_cppr->index < 1))
130 return LOWEST_PRIORITY;
131
132 return os_cppr->stack[--os_cppr->index];
133}
134
135static inline void xics_set_base_cppr(unsigned char cppr)
136{
137 struct xics_cppr *os_cppr = this_cpu_ptr(&xics_cppr);
138
139
140
141
142 WARN_ON(os_cppr->index != 0);
143
144 os_cppr->stack[0] = cppr;
145}
146
147static inline unsigned char xics_cppr_top(void)
148{
149 struct xics_cppr *os_cppr = this_cpu_ptr(&xics_cppr);
150
151 return os_cppr->stack[os_cppr->index];
152}
153
154DECLARE_PER_CPU_SHARED_ALIGNED(unsigned long, xics_ipi_message);
155
156extern void xics_init(void);
157extern void xics_setup_cpu(void);
158extern void xics_update_irq_servers(void);
159extern void xics_set_cpu_giq(unsigned int gserver, unsigned int join);
160extern void xics_mask_unknown_vec(unsigned int vec);
161extern irqreturn_t xics_ipi_dispatch(int cpu);
162extern void xics_smp_probe(void);
163extern void xics_register_ics(struct ics *ics);
164extern void xics_teardown_cpu(void);
165extern void xics_kexec_teardown_cpu(int secondary);
166extern void xics_migrate_irqs_away(void);
167extern void icp_native_eoi(struct irq_data *d);
168extern int xics_set_irq_type(struct irq_data *d, unsigned int flow_type);
169extern int xics_retrigger(struct irq_data *data);
170#ifdef CONFIG_SMP
171extern int xics_get_irq_server(unsigned int virq, const struct cpumask *cpumask,
172 unsigned int strict_check);
173#else
174#define xics_get_irq_server(virq, cpumask, strict_check) (xics_default_server)
175#endif
176
177
178#endif
179