Commit | Line | Data |
---|---|---|
0b05ac6e BH |
1 | /* |
2 | * Common definitions accross all variants of ICP and ICS interrupt | |
3 | * controllers. | |
4 | */ | |
5 | ||
6 | #ifndef _XICS_H | |
7 | #define _XICS_H | |
8 | ||
cd852579 ME |
9 | #include <linux/interrupt.h> |
10 | ||
0b05ac6e BH |
11 | #define XICS_IPI 2 |
12 | #define XICS_IRQ_SPURIOUS 0 | |
13 | ||
14 | /* Want a priority other than 0. Various HW issues require this. */ | |
15 | #define DEFAULT_PRIORITY 5 | |
16 | ||
17 | /* | |
18 | * Mark IPIs as higher priority so we can take them inside interrupts that | |
19 | * arent marked IRQF_DISABLED | |
20 | */ | |
21 | #define IPI_PRIORITY 4 | |
22 | ||
23 | /* The least favored priority */ | |
24 | #define LOWEST_PRIORITY 0xFF | |
25 | ||
26 | /* The number of priorities defined above */ | |
27 | #define MAX_NUM_PRIORITIES 3 | |
28 | ||
29 | /* Native ICP */ | |
30 | extern int icp_native_init(void); | |
31 | ||
32 | /* PAPR ICP */ | |
33 | extern int icp_hv_init(void); | |
34 | ||
35 | /* ICP ops */ | |
36 | struct icp_ops { | |
37 | unsigned int (*get_irq)(void); | |
38 | void (*eoi)(struct irq_data *d); | |
39 | void (*set_priority)(unsigned char prio); | |
40 | void (*teardown_cpu)(void); | |
41 | void (*flush_ipi)(void); | |
42 | #ifdef CONFIG_SMP | |
f1072939 | 43 | void (*message_pass)(int cpu, int msg); |
0b05ac6e BH |
44 | irq_handler_t ipi_action; |
45 | #endif | |
46 | }; | |
47 | ||
48 | extern const struct icp_ops *icp_ops; | |
49 | ||
50 | /* Native ICS */ | |
51 | extern int ics_native_init(void); | |
52 | ||
53 | /* RTAS ICS */ | |
54 | extern int ics_rtas_init(void); | |
55 | ||
56 | /* ICS instance, hooked up to chip_data of an irq */ | |
57 | struct ics { | |
58 | struct list_head link; | |
59 | int (*map)(struct ics *ics, unsigned int virq); | |
60 | void (*mask_unknown)(struct ics *ics, unsigned long vec); | |
61 | long (*get_server)(struct ics *ics, unsigned long vec); | |
5ca12376 | 62 | int (*host_match)(struct ics *ics, struct device_node *node); |
0b05ac6e BH |
63 | char data[]; |
64 | }; | |
65 | ||
66 | /* Commons */ | |
67 | extern unsigned int xics_default_server; | |
68 | extern unsigned int xics_default_distrib_server; | |
69 | extern unsigned int xics_interrupt_server_size; | |
70 | extern struct irq_host *xics_host; | |
71 | ||
72 | struct xics_cppr { | |
73 | unsigned char stack[MAX_NUM_PRIORITIES]; | |
74 | int index; | |
75 | }; | |
76 | ||
77 | DECLARE_PER_CPU(struct xics_cppr, xics_cppr); | |
78 | ||
79 | static inline void xics_push_cppr(unsigned int vec) | |
80 | { | |
81 | struct xics_cppr *os_cppr = &__get_cpu_var(xics_cppr); | |
82 | ||
83 | if (WARN_ON(os_cppr->index >= MAX_NUM_PRIORITIES - 1)) | |
84 | return; | |
85 | ||
86 | if (vec == XICS_IPI) | |
87 | os_cppr->stack[++os_cppr->index] = IPI_PRIORITY; | |
88 | else | |
89 | os_cppr->stack[++os_cppr->index] = DEFAULT_PRIORITY; | |
90 | } | |
91 | ||
92 | static inline unsigned char xics_pop_cppr(void) | |
93 | { | |
94 | struct xics_cppr *os_cppr = &__get_cpu_var(xics_cppr); | |
95 | ||
96 | if (WARN_ON(os_cppr->index < 1)) | |
97 | return LOWEST_PRIORITY; | |
98 | ||
99 | return os_cppr->stack[--os_cppr->index]; | |
100 | } | |
101 | ||
102 | static inline void xics_set_base_cppr(unsigned char cppr) | |
103 | { | |
104 | struct xics_cppr *os_cppr = &__get_cpu_var(xics_cppr); | |
105 | ||
106 | /* we only really want to set the priority when there's | |
107 | * just one cppr value on the stack | |
108 | */ | |
109 | WARN_ON(os_cppr->index != 0); | |
110 | ||
111 | os_cppr->stack[0] = cppr; | |
112 | } | |
113 | ||
114 | static inline unsigned char xics_cppr_top(void) | |
115 | { | |
116 | struct xics_cppr *os_cppr = &__get_cpu_var(xics_cppr); | |
117 | ||
118 | return os_cppr->stack[os_cppr->index]; | |
119 | } | |
120 | ||
121 | DECLARE_PER_CPU_SHARED_ALIGNED(unsigned long, xics_ipi_message); | |
122 | ||
123 | extern void xics_init(void); | |
124 | extern void xics_setup_cpu(void); | |
125 | extern void xics_update_irq_servers(void); | |
126 | extern void xics_set_cpu_giq(unsigned int gserver, unsigned int join); | |
127 | extern void xics_mask_unknown_vec(unsigned int vec); | |
128 | extern irqreturn_t xics_ipi_dispatch(int cpu); | |
129 | extern int xics_smp_probe(void); | |
130 | extern void xics_register_ics(struct ics *ics); | |
131 | extern void xics_teardown_cpu(void); | |
132 | extern void xics_kexec_teardown_cpu(int secondary); | |
133 | extern void xics_migrate_irqs_away(void); | |
134 | #ifdef CONFIG_SMP | |
135 | extern int xics_get_irq_server(unsigned int virq, const struct cpumask *cpumask, | |
136 | unsigned int strict_check); | |
137 | #else | |
138 | #define xics_get_irq_server(virq, cpumask, strict_check) (xics_default_server) | |
139 | #endif | |
140 | ||
141 | ||
142 | #endif /* _XICS_H */ |