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internals.h
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1 #include <linux/sh_intc.h>
2 #include <linux/irq.h>
3 #include <linux/irqdomain.h>
4 #include <linux/list.h>
5 #include <linux/kernel.h>
6 #include <linux/types.h>
7 #include <linux/radix-tree.h>
8 #include <linux/device.h>
9 
10 #define _INTC_MK(fn, mode, addr_e, addr_d, width, shift) \
11  ((shift) | ((width) << 5) | ((fn) << 9) | ((mode) << 13) | \
12  ((addr_e) << 16) | ((addr_d << 24)))
13 
14 #define _INTC_SHIFT(h) (h & 0x1f)
15 #define _INTC_WIDTH(h) ((h >> 5) & 0xf)
16 #define _INTC_FN(h) ((h >> 9) & 0xf)
17 #define _INTC_MODE(h) ((h >> 13) & 0x7)
18 #define _INTC_ADDR_E(h) ((h >> 16) & 0xff)
19 #define _INTC_ADDR_D(h) ((h >> 24) & 0xff)
20 
21 #ifdef CONFIG_SMP
22 #define IS_SMP(x) (x.smp)
23 #define INTC_REG(d, x, c) (d->reg[(x)] + ((d->smp[(x)] & 0xff) * c))
24 #define SMP_NR(d, x) ((d->smp[(x)] >> 8) ? (d->smp[(x)] >> 8) : 1)
25 #else
26 #define IS_SMP(x) 0
27 #define INTC_REG(d, x, c) (d->reg[(x)])
28 #define SMP_NR(d, x) 1
29 #endif
30 
31 struct intc_handle_int {
32  unsigned int irq;
33  unsigned long handle;
34 };
35 
36 struct intc_window {
37  phys_addr_t phys;
38  void __iomem *virt;
39  unsigned long size;
40 };
41 
42 struct intc_map_entry {
43  intc_enum enum_id;
44  struct intc_desc_int *desc;
45 };
46 
47 struct intc_subgroup_entry {
48  unsigned int pirq;
49  intc_enum enum_id;
50  unsigned long handle;
51 };
52 
53 struct intc_desc_int {
54  struct list_head list;
55  struct device dev;
56  struct radix_tree_root tree;
57  raw_spinlock_t lock;
58  unsigned int index;
59  unsigned long *reg;
60 #ifdef CONFIG_SMP
61  unsigned long *smp;
62 #endif
63  unsigned int nr_reg;
64  struct intc_handle_int *prio;
65  unsigned int nr_prio;
66  struct intc_handle_int *sense;
67  unsigned int nr_sense;
68  struct intc_window *window;
69  unsigned int nr_windows;
70  struct irq_domain *domain;
71  struct irq_chip chip;
72  bool skip_suspend;
73 };
74 
75 
76 enum {
77  REG_FN_ERR = 0,
78  REG_FN_TEST_BASE = 1,
79  REG_FN_WRITE_BASE = 5,
80  REG_FN_MODIFY_BASE = 9
81 };
82 
83 enum { MODE_ENABLE_REG = 0, /* Bit(s) set -> interrupt enabled */
84  MODE_MASK_REG, /* Bit(s) set -> interrupt disabled */
85  MODE_DUAL_REG, /* Two registers, set bit to enable / disable */
86  MODE_PRIO_REG, /* Priority value written to enable interrupt */
87  MODE_PCLR_REG, /* Above plus all bits set to disable interrupt */
88 };
89 
90 static inline struct intc_desc_int *get_intc_desc(unsigned int irq)
91 {
92  struct irq_chip *chip = irq_get_chip(irq);
93 
94  return container_of(chip, struct intc_desc_int, chip);
95 }
96 
97 /*
98  * Grumble.
99  */
100 static inline void activate_irq(int irq)
101 {
102 #ifdef CONFIG_ARM
103  /* ARM requires an extra step to clear IRQ_NOREQUEST, which it
104  * sets on behalf of every irq_chip. Also sets IRQ_NOPROBE.
105  */
106  set_irq_flags(irq, IRQF_VALID);
107 #else
108  /* same effect on other architectures */
109  irq_set_noprobe(irq);
110 #endif
111 }
112 
113 static inline int intc_handle_int_cmp(const void *a, const void *b)
114 {
115  const struct intc_handle_int *_a = a;
116  const struct intc_handle_int *_b = b;
117 
118  return _a->irq - _b->irq;
119 }
120 
121 /* access.c */
122 extern unsigned long
123 (*intc_reg_fns[])(unsigned long addr, unsigned long h, unsigned long data);
124 
125 extern unsigned long
126 (*intc_enable_fns[])(unsigned long addr, unsigned long handle,
127  unsigned long (*fn)(unsigned long,
128  unsigned long, unsigned long),
129  unsigned int irq);
130 extern unsigned long
131 (*intc_disable_fns[])(unsigned long addr, unsigned long handle,
132  unsigned long (*fn)(unsigned long,
133  unsigned long, unsigned long),
134  unsigned int irq);
135 extern unsigned long
136 (*intc_enable_noprio_fns[])(unsigned long addr, unsigned long handle,
137  unsigned long (*fn)(unsigned long,
138  unsigned long, unsigned long),
139  unsigned int irq);
140 
141 unsigned long intc_phys_to_virt(struct intc_desc_int *d, unsigned long address);
142 unsigned int intc_get_reg(struct intc_desc_int *d, unsigned long address);
143 unsigned int intc_set_field_from_handle(unsigned int value,
144  unsigned int field_value,
145  unsigned int handle);
146 unsigned long intc_get_field_from_handle(unsigned int value,
147  unsigned int handle);
148 
149 /* balancing.c */
150 #ifdef CONFIG_INTC_BALANCING
151 void intc_balancing_enable(unsigned int irq);
152 void intc_balancing_disable(unsigned int irq);
153 void intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
154  struct intc_desc_int *d, intc_enum id);
155 #else
156 static inline void intc_balancing_enable(unsigned int irq) { }
157 static inline void intc_balancing_disable(unsigned int irq) { }
158 static inline void
159 intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
160  struct intc_desc_int *d, intc_enum id) { }
161 #endif
162 
163 /* chip.c */
164 extern struct irq_chip intc_irq_chip;
165 void _intc_enable(struct irq_data *data, unsigned long handle);
166 
167 /* core.c */
168 extern struct list_head intc_list;
169 extern raw_spinlock_t intc_big_lock;
170 extern struct bus_type intc_subsys;
171 
172 unsigned int intc_get_dfl_prio_level(void);
173 unsigned int intc_get_prio_level(unsigned int irq);
174 void intc_set_prio_level(unsigned int irq, unsigned int level);
175 
176 /* handle.c */
177 unsigned int intc_get_mask_handle(struct intc_desc *desc,
178  struct intc_desc_int *d,
179  intc_enum enum_id, int do_grps);
180 unsigned int intc_get_prio_handle(struct intc_desc *desc,
181  struct intc_desc_int *d,
182  intc_enum enum_id, int do_grps);
183 unsigned int intc_get_sense_handle(struct intc_desc *desc,
184  struct intc_desc_int *d,
185  intc_enum enum_id);
186 void intc_set_ack_handle(unsigned int irq, struct intc_desc *desc,
187  struct intc_desc_int *d, intc_enum id);
188 unsigned long intc_get_ack_handle(unsigned int irq);
189 void intc_enable_disable_enum(struct intc_desc *desc, struct intc_desc_int *d,
190  intc_enum enum_id, int enable);
191 
192 /* irqdomain.c */
193 void intc_irq_domain_init(struct intc_desc_int *d, struct intc_hw_desc *hw);
194 
195 /* virq.c */
196 void intc_subgroup_init(struct intc_desc *desc, struct intc_desc_int *d);
197 void intc_irq_xlate_set(unsigned int irq, intc_enum id, struct intc_desc_int *d);
198 struct intc_map_entry *intc_irq_xlate_get(unsigned int irq);
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