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iosapic.h
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1 #ifndef __ASM_IA64_IOSAPIC_H
2 #define __ASM_IA64_IOSAPIC_H
3 
4 #define IOSAPIC_REG_SELECT 0x0
5 #define IOSAPIC_WINDOW 0x10
6 #define IOSAPIC_EOI 0x40
7 
8 #define IOSAPIC_VERSION 0x1
9 
10 /*
11  * Redirection table entry
12  */
13 #define IOSAPIC_RTE_LOW(i) (0x10+i*2)
14 #define IOSAPIC_RTE_HIGH(i) (0x11+i*2)
15 
16 #define IOSAPIC_DEST_SHIFT 16
17 
18 /*
19  * Delivery mode
20  */
21 #define IOSAPIC_DELIVERY_SHIFT 8
22 #define IOSAPIC_FIXED 0x0
23 #define IOSAPIC_LOWEST_PRIORITY 0x1
24 #define IOSAPIC_PMI 0x2
25 #define IOSAPIC_NMI 0x4
26 #define IOSAPIC_INIT 0x5
27 #define IOSAPIC_EXTINT 0x7
28 
29 /*
30  * Interrupt polarity
31  */
32 #define IOSAPIC_POLARITY_SHIFT 13
33 #define IOSAPIC_POL_HIGH 0
34 #define IOSAPIC_POL_LOW 1
35 
36 /*
37  * Trigger mode
38  */
39 #define IOSAPIC_TRIGGER_SHIFT 15
40 #define IOSAPIC_EDGE 0
41 #define IOSAPIC_LEVEL 1
42 
43 /*
44  * Mask bit
45  */
46 
47 #define IOSAPIC_MASK_SHIFT 16
48 #define IOSAPIC_MASK (1<<IOSAPIC_MASK_SHIFT)
49 
50 #define IOSAPIC_VECTOR_MASK 0xffffff00
51 
52 #ifndef __ASSEMBLY__
53 
54 #ifdef CONFIG_IOSAPIC
55 
56 #define NR_IOSAPICS 256
57 
58 #ifdef CONFIG_PARAVIRT_GUEST
59 #include <asm/paravirt.h>
60 #else
61 #define iosapic_pcat_compat_init ia64_native_iosapic_pcat_compat_init
62 #define __iosapic_read __ia64_native_iosapic_read
63 #define __iosapic_write __ia64_native_iosapic_write
64 #define iosapic_get_irq_chip ia64_native_iosapic_get_irq_chip
65 #endif
66 
68 extern struct irq_chip *ia64_native_iosapic_get_irq_chip(unsigned long trigger);
69 
70 static inline unsigned int
71 __ia64_native_iosapic_read(char __iomem *iosapic, unsigned int reg)
72 {
73  writel(reg, iosapic + IOSAPIC_REG_SELECT);
74  return readl(iosapic + IOSAPIC_WINDOW);
75 }
76 
77 static inline void
78 __ia64_native_iosapic_write(char __iomem *iosapic, unsigned int reg, u32 val)
79 {
80  writel(reg, iosapic + IOSAPIC_REG_SELECT);
81  writel(val, iosapic + IOSAPIC_WINDOW);
82 }
83 
84 static inline void iosapic_eoi(char __iomem *iosapic, u32 vector)
85 {
86  writel(vector, iosapic + IOSAPIC_EOI);
87 }
88 
89 extern void __init iosapic_system_init (int pcat_compat);
90 extern int __devinit iosapic_init (unsigned long address,
91  unsigned int gsi_base);
92 #ifdef CONFIG_HOTPLUG
93 extern int iosapic_remove (unsigned int gsi_base);
94 #else
95 #define iosapic_remove(gsi_base) (-EINVAL)
96 #endif /* CONFIG_HOTPLUG */
97 extern int gsi_to_irq (unsigned int gsi);
98 extern int iosapic_register_intr (unsigned int gsi, unsigned long polarity,
99  unsigned long trigger);
100 extern void iosapic_unregister_intr (unsigned int irq);
101 extern void __devinit iosapic_override_isa_irq (unsigned int isa_irq, unsigned int gsi,
102  unsigned long polarity,
103  unsigned long trigger);
105  unsigned int gsi,
106  int pmi_vector,
107  u16 eid, u16 id,
108  unsigned long polarity,
109  unsigned long trigger);
110 
111 #ifdef CONFIG_NUMA
112 extern void __devinit map_iosapic_to_node (unsigned int, int);
113 #endif
114 #else
115 #define iosapic_system_init(pcat_compat) do { } while (0)
116 #define iosapic_init(address,gsi_base) (-EINVAL)
117 #define iosapic_remove(gsi_base) (-ENODEV)
118 #define iosapic_register_intr(gsi,polarity,trigger) (gsi)
119 #define iosapic_unregister_intr(irq) do { } while (0)
120 #define iosapic_override_isa_irq(isa_irq,gsi,polarity,trigger) do { } while (0)
121 #define iosapic_register_platform_intr(type,gsi,pmi,eid,id, \
122  polarity,trigger) (gsi)
123 #endif
124 
125 # endif /* !__ASSEMBLY__ */
126 #endif /* __ASM_IA64_IOSAPIC_H */