2 * Common definitions accross 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);
33 static inline int icp_native_init(void) { return -ENODEV; }
37 #ifdef CONFIG_PPC_ICP_HV
38 extern int icp_hv_init(void);
40 static inline int icp_hv_init(void) { return -ENODEV; }
45 unsigned int (*get_irq)(void);
46 void (*eoi)(struct irq_data *d);
47 void (*set_priority)(unsigned char prio);
48 void (*teardown_cpu)(void);
49 void (*flush_ipi)(void);
51 void (*cause_ipi)(int cpu, unsigned long data);
52 irq_handler_t ipi_action;
56 extern const struct icp_ops *icp_ops;
59 extern int ics_native_init(void);
62 #ifdef CONFIG_PPC_ICS_RTAS
63 extern int ics_rtas_init(void);
65 static inline int ics_rtas_init(void) { return -ENODEV; }
69 #ifdef CONFIG_PPC_POWERNV
70 extern int ics_opal_init(void);
72 static inline int ics_opal_init(void) { return -ENODEV; }
75 /* ICS instance, hooked up to chip_data of an irq */
77 struct list_head link;
78 int (*map)(struct ics *ics, unsigned int virq);
79 void (*mask_unknown)(struct ics *ics, unsigned long vec);
80 long (*get_server)(struct ics *ics, unsigned long vec);
81 int (*host_match)(struct ics *ics, struct device_node *node);
86 extern unsigned int xics_default_server;
87 extern unsigned int xics_default_distrib_server;
88 extern unsigned int xics_interrupt_server_size;
89 extern struct irq_domain *xics_host;
92 unsigned char stack[MAX_NUM_PRIORITIES];
96 DECLARE_PER_CPU(struct xics_cppr, xics_cppr);
98 static inline void xics_push_cppr(unsigned int vec)
100 struct xics_cppr *os_cppr = &__get_cpu_var(xics_cppr);
102 if (WARN_ON(os_cppr->index >= MAX_NUM_PRIORITIES - 1))
106 os_cppr->stack[++os_cppr->index] = IPI_PRIORITY;
108 os_cppr->stack[++os_cppr->index] = DEFAULT_PRIORITY;
111 static inline unsigned char xics_pop_cppr(void)
113 struct xics_cppr *os_cppr = &__get_cpu_var(xics_cppr);
115 if (WARN_ON(os_cppr->index < 1))
116 return LOWEST_PRIORITY;
118 return os_cppr->stack[--os_cppr->index];
121 static inline void xics_set_base_cppr(unsigned char cppr)
123 struct xics_cppr *os_cppr = &__get_cpu_var(xics_cppr);
125 /* we only really want to set the priority when there's
126 * just one cppr value on the stack
128 WARN_ON(os_cppr->index != 0);
130 os_cppr->stack[0] = cppr;
133 static inline unsigned char xics_cppr_top(void)
135 struct xics_cppr *os_cppr = &__get_cpu_var(xics_cppr);
137 return os_cppr->stack[os_cppr->index];
140 DECLARE_PER_CPU_SHARED_ALIGNED(unsigned long, xics_ipi_message);
142 extern void xics_init(void);
143 extern void xics_setup_cpu(void);
144 extern void xics_update_irq_servers(void);
145 extern void xics_set_cpu_giq(unsigned int gserver, unsigned int join);
146 extern void xics_mask_unknown_vec(unsigned int vec);
147 extern irqreturn_t xics_ipi_dispatch(int cpu);
148 extern int xics_smp_probe(void);
149 extern void xics_register_ics(struct ics *ics);
150 extern void xics_teardown_cpu(void);
151 extern void xics_kexec_teardown_cpu(int secondary);
152 extern void xics_migrate_irqs_away(void);
153 extern void icp_native_eoi(struct irq_data *d);
155 extern int xics_get_irq_server(unsigned int virq, const struct cpumask *cpumask,
156 unsigned int strict_check);
158 #define xics_get_irq_server(virq, cpumask, strict_check) (xics_default_server)