2 * Common definitions across all variants of ICP and ICS interrupt
9 #include <linux/interrupt.h>
12 #define XICS_IRQ_SPURIOUS 0
14 /* Want a priority other than 0. Various HW issues require this. */
15 #define DEFAULT_PRIORITY 5
18 * Mark IPIs as higher priority so we can take them inside interrupts
19 * FIXME: still true now?
21 #define IPI_PRIORITY 4
23 /* The least favored priority */
24 #define LOWEST_PRIORITY 0xFF
26 /* The number of priorities defined above */
27 #define MAX_NUM_PRIORITIES 3
30 #ifdef CONFIG_PPC_ICP_NATIVE
31 extern int icp_native_init(void);
32 extern void icp_native_flush_interrupt(void);
33 extern void icp_native_cause_ipi_rm(int cpu
);
35 static inline int icp_native_init(void) { return -ENODEV
; }
39 #ifdef CONFIG_PPC_ICP_HV
40 extern int icp_hv_init(void);
42 static inline int icp_hv_init(void) { return -ENODEV
; }
47 unsigned int (*get_irq
)(void);
48 void (*eoi
)(struct irq_data
*d
);
49 void (*set_priority
)(unsigned char prio
);
50 void (*teardown_cpu
)(void);
51 void (*flush_ipi
)(void);
53 void (*cause_ipi
)(int cpu
, unsigned long data
);
54 irq_handler_t ipi_action
;
58 extern const struct icp_ops
*icp_ops
;
61 extern int ics_native_init(void);
64 #ifdef CONFIG_PPC_ICS_RTAS
65 extern int ics_rtas_init(void);
67 static inline int ics_rtas_init(void) { return -ENODEV
; }
71 #ifdef CONFIG_PPC_POWERNV
72 extern int ics_opal_init(void);
74 static inline int ics_opal_init(void) { return -ENODEV
; }
77 /* ICS instance, hooked up to chip_data of an irq */
79 struct list_head link
;
80 int (*map
)(struct ics
*ics
, unsigned int virq
);
81 void (*mask_unknown
)(struct ics
*ics
, unsigned long vec
);
82 long (*get_server
)(struct ics
*ics
, unsigned long vec
);
83 int (*host_match
)(struct ics
*ics
, struct device_node
*node
);
88 extern unsigned int xics_default_server
;
89 extern unsigned int xics_default_distrib_server
;
90 extern unsigned int xics_interrupt_server_size
;
91 extern struct irq_domain
*xics_host
;
94 unsigned char stack
[MAX_NUM_PRIORITIES
];
98 DECLARE_PER_CPU(struct xics_cppr
, xics_cppr
);
100 static inline void xics_push_cppr(unsigned int vec
)
102 struct xics_cppr
*os_cppr
= this_cpu_ptr(&xics_cppr
);
104 if (WARN_ON(os_cppr
->index
>= MAX_NUM_PRIORITIES
- 1))
108 os_cppr
->stack
[++os_cppr
->index
] = IPI_PRIORITY
;
110 os_cppr
->stack
[++os_cppr
->index
] = DEFAULT_PRIORITY
;
113 static inline unsigned char xics_pop_cppr(void)
115 struct xics_cppr
*os_cppr
= this_cpu_ptr(&xics_cppr
);
117 if (WARN_ON(os_cppr
->index
< 1))
118 return LOWEST_PRIORITY
;
120 return os_cppr
->stack
[--os_cppr
->index
];
123 static inline void xics_set_base_cppr(unsigned char cppr
)
125 struct xics_cppr
*os_cppr
= this_cpu_ptr(&xics_cppr
);
127 /* we only really want to set the priority when there's
128 * just one cppr value on the stack
130 WARN_ON(os_cppr
->index
!= 0);
132 os_cppr
->stack
[0] = cppr
;
135 static inline unsigned char xics_cppr_top(void)
137 struct xics_cppr
*os_cppr
= this_cpu_ptr(&xics_cppr
);
139 return os_cppr
->stack
[os_cppr
->index
];
142 DECLARE_PER_CPU_SHARED_ALIGNED(unsigned long, xics_ipi_message
);
144 extern void xics_init(void);
145 extern void xics_setup_cpu(void);
146 extern void xics_update_irq_servers(void);
147 extern void xics_set_cpu_giq(unsigned int gserver
, unsigned int join
);
148 extern void xics_mask_unknown_vec(unsigned int vec
);
149 extern irqreturn_t
xics_ipi_dispatch(int cpu
);
150 extern void xics_smp_probe(void);
151 extern void xics_register_ics(struct ics
*ics
);
152 extern void xics_teardown_cpu(void);
153 extern void xics_kexec_teardown_cpu(int secondary
);
154 extern void xics_migrate_irqs_away(void);
155 extern void icp_native_eoi(struct irq_data
*d
);
157 extern int xics_get_irq_server(unsigned int virq
, const struct cpumask
*cpumask
,
158 unsigned int strict_check
);
160 #define xics_get_irq_server(virq, cpumask, strict_check) (xics_default_server)