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1 | #include <linux/irq.h> |
2 | ||
3 | /* | |
4 | * Global registers | |
5 | */ | |
6 | ||
7 | #define MPIC_GREG_BASE 0x01000 | |
8 | ||
9 | #define MPIC_GREG_FEATURE_0 0x00000 | |
10 | #define MPIC_GREG_FEATURE_LAST_SRC_MASK 0x07ff0000 | |
11 | #define MPIC_GREG_FEATURE_LAST_SRC_SHIFT 16 | |
12 | #define MPIC_GREG_FEATURE_LAST_CPU_MASK 0x00001f00 | |
13 | #define MPIC_GREG_FEATURE_LAST_CPU_SHIFT 8 | |
14 | #define MPIC_GREG_FEATURE_VERSION_MASK 0xff | |
15 | #define MPIC_GREG_FEATURE_1 0x00010 | |
16 | #define MPIC_GREG_GLOBAL_CONF_0 0x00020 | |
17 | #define MPIC_GREG_GCONF_RESET 0x80000000 | |
18 | #define MPIC_GREG_GCONF_8259_PTHROU_DIS 0x20000000 | |
19 | #define MPIC_GREG_GCONF_BASE_MASK 0x000fffff | |
20 | #define MPIC_GREG_GLOBAL_CONF_1 0x00030 | |
21 | #define MPIC_GREG_VENDOR_0 0x00040 | |
22 | #define MPIC_GREG_VENDOR_1 0x00050 | |
23 | #define MPIC_GREG_VENDOR_2 0x00060 | |
24 | #define MPIC_GREG_VENDOR_3 0x00070 | |
25 | #define MPIC_GREG_VENDOR_ID 0x00080 | |
26 | #define MPIC_GREG_VENDOR_ID_STEPPING_MASK 0x00ff0000 | |
27 | #define MPIC_GREG_VENDOR_ID_STEPPING_SHIFT 16 | |
28 | #define MPIC_GREG_VENDOR_ID_DEVICE_ID_MASK 0x0000ff00 | |
29 | #define MPIC_GREG_VENDOR_ID_DEVICE_ID_SHIFT 8 | |
30 | #define MPIC_GREG_VENDOR_ID_VENDOR_ID_MASK 0x000000ff | |
31 | #define MPIC_GREG_PROCESSOR_INIT 0x00090 | |
32 | #define MPIC_GREG_IPI_VECTOR_PRI_0 0x000a0 | |
33 | #define MPIC_GREG_IPI_VECTOR_PRI_1 0x000b0 | |
34 | #define MPIC_GREG_IPI_VECTOR_PRI_2 0x000c0 | |
35 | #define MPIC_GREG_IPI_VECTOR_PRI_3 0x000d0 | |
36 | #define MPIC_GREG_SPURIOUS 0x000e0 | |
37 | #define MPIC_GREG_TIMER_FREQ 0x000f0 | |
38 | ||
39 | /* | |
40 | * | |
41 | * Timer registers | |
42 | */ | |
43 | #define MPIC_TIMER_BASE 0x01100 | |
44 | #define MPIC_TIMER_STRIDE 0x40 | |
45 | ||
46 | #define MPIC_TIMER_CURRENT_CNT 0x00000 | |
47 | #define MPIC_TIMER_BASE_CNT 0x00010 | |
48 | #define MPIC_TIMER_VECTOR_PRI 0x00020 | |
49 | #define MPIC_TIMER_DESTINATION 0x00030 | |
50 | ||
51 | /* | |
52 | * Per-Processor registers | |
53 | */ | |
54 | ||
55 | #define MPIC_CPU_THISBASE 0x00000 | |
56 | #define MPIC_CPU_BASE 0x20000 | |
57 | #define MPIC_CPU_STRIDE 0x01000 | |
58 | ||
59 | #define MPIC_CPU_IPI_DISPATCH_0 0x00040 | |
60 | #define MPIC_CPU_IPI_DISPATCH_1 0x00050 | |
61 | #define MPIC_CPU_IPI_DISPATCH_2 0x00060 | |
62 | #define MPIC_CPU_IPI_DISPATCH_3 0x00070 | |
63 | #define MPIC_CPU_CURRENT_TASK_PRI 0x00080 | |
64 | #define MPIC_CPU_TASKPRI_MASK 0x0000000f | |
65 | #define MPIC_CPU_WHOAMI 0x00090 | |
66 | #define MPIC_CPU_WHOAMI_MASK 0x0000001f | |
67 | #define MPIC_CPU_INTACK 0x000a0 | |
68 | #define MPIC_CPU_EOI 0x000b0 | |
69 | ||
70 | /* | |
71 | * Per-source registers | |
72 | */ | |
73 | ||
74 | #define MPIC_IRQ_BASE 0x10000 | |
75 | #define MPIC_IRQ_STRIDE 0x00020 | |
76 | #define MPIC_IRQ_VECTOR_PRI 0x00000 | |
77 | #define MPIC_VECPRI_MASK 0x80000000 | |
78 | #define MPIC_VECPRI_ACTIVITY 0x40000000 /* Read Only */ | |
79 | #define MPIC_VECPRI_PRIORITY_MASK 0x000f0000 | |
80 | #define MPIC_VECPRI_PRIORITY_SHIFT 16 | |
81 | #define MPIC_VECPRI_VECTOR_MASK 0x000007ff | |
82 | #define MPIC_VECPRI_POLARITY_POSITIVE 0x00800000 | |
83 | #define MPIC_VECPRI_POLARITY_NEGATIVE 0x00000000 | |
84 | #define MPIC_VECPRI_POLARITY_MASK 0x00800000 | |
85 | #define MPIC_VECPRI_SENSE_LEVEL 0x00400000 | |
86 | #define MPIC_VECPRI_SENSE_EDGE 0x00000000 | |
87 | #define MPIC_VECPRI_SENSE_MASK 0x00400000 | |
88 | #define MPIC_IRQ_DESTINATION 0x00010 | |
89 | ||
90 | #define MPIC_MAX_IRQ_SOURCES 2048 | |
91 | #define MPIC_MAX_CPUS 32 | |
92 | #define MPIC_MAX_ISU 32 | |
93 | ||
94 | /* | |
95 | * Special vector numbers (internal use only) | |
96 | */ | |
97 | #define MPIC_VEC_SPURRIOUS 255 | |
98 | #define MPIC_VEC_IPI_3 254 | |
99 | #define MPIC_VEC_IPI_2 253 | |
100 | #define MPIC_VEC_IPI_1 252 | |
101 | #define MPIC_VEC_IPI_0 251 | |
102 | ||
103 | /* unused */ | |
104 | #define MPIC_VEC_TIMER_3 250 | |
105 | #define MPIC_VEC_TIMER_2 249 | |
106 | #define MPIC_VEC_TIMER_1 248 | |
107 | #define MPIC_VEC_TIMER_0 247 | |
108 | ||
109 | /* Type definition of the cascade handler */ | |
110 | typedef int (*mpic_cascade_t)(struct pt_regs *regs, void *data); | |
111 | ||
112 | #ifdef CONFIG_MPIC_BROKEN_U3 | |
113 | /* Fixup table entry */ | |
114 | struct mpic_irq_fixup | |
115 | { | |
116 | u8 __iomem *base; | |
117 | unsigned int irq; | |
118 | }; | |
119 | #endif /* CONFIG_MPIC_BROKEN_U3 */ | |
120 | ||
121 | ||
122 | /* The instance data of a given MPIC */ | |
123 | struct mpic | |
124 | { | |
125 | /* The "linux" controller struct */ | |
126 | hw_irq_controller hc_irq; | |
127 | #ifdef CONFIG_SMP | |
128 | hw_irq_controller hc_ipi; | |
129 | #endif | |
130 | const char *name; | |
131 | /* Flags */ | |
132 | unsigned int flags; | |
133 | /* How many irq sources in a given ISU */ | |
134 | unsigned int isu_size; | |
135 | unsigned int isu_shift; | |
136 | unsigned int isu_mask; | |
137 | /* Offset of irq vector numbers */ | |
138 | unsigned int irq_offset; | |
139 | unsigned int irq_count; | |
140 | /* Offset of ipi vector numbers */ | |
141 | unsigned int ipi_offset; | |
142 | /* Number of sources */ | |
143 | unsigned int num_sources; | |
144 | /* Number of CPUs */ | |
145 | unsigned int num_cpus; | |
146 | /* cascade handler */ | |
147 | mpic_cascade_t cascade; | |
148 | void *cascade_data; | |
149 | unsigned int cascade_vec; | |
150 | /* senses array */ | |
151 | unsigned char *senses; | |
152 | unsigned int senses_count; | |
153 | ||
154 | #ifdef CONFIG_MPIC_BROKEN_U3 | |
155 | /* The fixup table */ | |
156 | struct mpic_irq_fixup *fixups; | |
157 | spinlock_t fixup_lock; | |
158 | #endif | |
159 | ||
160 | /* The various ioremap'ed bases */ | |
161 | volatile u32 __iomem *gregs; | |
162 | volatile u32 __iomem *tmregs; | |
163 | volatile u32 __iomem *cpuregs[MPIC_MAX_CPUS]; | |
164 | volatile u32 __iomem *isus[MPIC_MAX_ISU]; | |
165 | ||
166 | /* link */ | |
167 | struct mpic *next; | |
168 | }; | |
169 | ||
170 | /* This is the primary controller, only that one has IPIs and | |
171 | * has afinity control. A non-primary MPIC always uses CPU0 | |
172 | * registers only | |
173 | */ | |
174 | #define MPIC_PRIMARY 0x00000001 | |
175 | /* Set this for a big-endian MPIC */ | |
176 | #define MPIC_BIG_ENDIAN 0x00000002 | |
177 | /* Broken U3 MPIC */ | |
178 | #define MPIC_BROKEN_U3 0x00000004 | |
179 | /* Broken IPI registers (autodetected) */ | |
180 | #define MPIC_BROKEN_IPI 0x00000008 | |
181 | /* MPIC wants a reset */ | |
182 | #define MPIC_WANTS_RESET 0x00000010 | |
183 | ||
184 | /* Allocate the controller structure and setup the linux irq descs | |
185 | * for the range if interrupts passed in. No HW initialization is | |
186 | * actually performed. | |
187 | * | |
188 | * @phys_addr: physial base address of the MPIC | |
189 | * @flags: flags, see constants above | |
190 | * @isu_size: number of interrupts in an ISU. Use 0 to use a | |
191 | * standard ISU-less setup (aka powermac) | |
192 | * @irq_offset: first irq number to assign to this mpic | |
193 | * @irq_count: number of irqs to use with this mpic IRQ sources. Pass 0 | |
194 | * to match the number of sources | |
195 | * @ipi_offset: first irq number to assign to this mpic IPI sources, | |
196 | * used only on primary mpic | |
197 | * @senses: array of sense values | |
198 | * @senses_num: number of entries in the array | |
199 | * | |
200 | * Note about the sense array. If none is passed, all interrupts are | |
201 | * setup to be level negative unless MPIC_BROKEN_U3 is set in which | |
202 | * case they are edge positive (and the array is ignored anyway). | |
203 | * The values in the array start at the first source of the MPIC, | |
204 | * that is senses[0] correspond to linux irq "irq_offset". | |
205 | */ | |
206 | extern struct mpic *mpic_alloc(unsigned long phys_addr, | |
207 | unsigned int flags, | |
208 | unsigned int isu_size, | |
209 | unsigned int irq_offset, | |
210 | unsigned int irq_count, | |
211 | unsigned int ipi_offset, | |
212 | unsigned char *senses, | |
213 | unsigned int senses_num, | |
214 | const char *name); | |
215 | ||
216 | /* Assign ISUs, to call before mpic_init() | |
217 | * | |
218 | * @mpic: controller structure as returned by mpic_alloc() | |
219 | * @isu_num: ISU number | |
220 | * @phys_addr: physical address of the ISU | |
221 | */ | |
222 | extern void mpic_assign_isu(struct mpic *mpic, unsigned int isu_num, | |
223 | unsigned long phys_addr); | |
224 | ||
225 | /* Initialize the controller. After this has been called, none of the above | |
226 | * should be called again for this mpic | |
227 | */ | |
228 | extern void mpic_init(struct mpic *mpic); | |
229 | ||
230 | /* Setup a cascade. Currently, only one cascade is supported this | |
231 | * way, though you can always do a normal request_irq() and add | |
232 | * other cascades this way. You should call this _after_ having | |
233 | * added all the ISUs | |
234 | * | |
235 | * @irq_no: "linux" irq number of the cascade (that is offset'ed vector) | |
236 | * @handler: cascade handler function | |
237 | */ | |
238 | extern void mpic_setup_cascade(unsigned int irq_no, mpic_cascade_t hanlder, | |
239 | void *data); | |
240 | ||
241 | /* | |
242 | * All of the following functions must only be used after the | |
243 | * ISUs have been assigned and the controller fully initialized | |
244 | * with mpic_init() | |
245 | */ | |
246 | ||
247 | ||
248 | /* Change/Read the priority of an interrupt. Default is 8 for irqs and | |
249 | * 10 for IPIs. You can call this on both IPIs and IRQ numbers, but the | |
250 | * IPI number is then the offset'ed (linux irq number mapped to the IPI) | |
251 | */ | |
252 | extern void mpic_irq_set_priority(unsigned int irq, unsigned int pri); | |
253 | extern unsigned int mpic_irq_get_priority(unsigned int irq); | |
254 | ||
255 | /* Setup a non-boot CPU */ | |
256 | extern void mpic_setup_this_cpu(void); | |
257 | ||
258 | /* Clean up for kexec (or cpu offline or ...) */ | |
259 | extern void mpic_teardown_this_cpu(int secondary); | |
260 | ||
261 | /* Get the current cpu priority for this cpu (0..15) */ | |
262 | extern int mpic_cpu_get_priority(void); | |
263 | ||
264 | /* Set the current cpu priority for this cpu */ | |
265 | extern void mpic_cpu_set_priority(int prio); | |
266 | ||
267 | /* Request IPIs on primary mpic */ | |
268 | extern void mpic_request_ipis(void); | |
269 | ||
270 | /* Send an IPI (non offseted number 0..3) */ | |
271 | extern void mpic_send_ipi(unsigned int ipi_no, unsigned int cpu_mask); | |
272 | ||
273 | /* Fetch interrupt from a given mpic */ | |
274 | extern int mpic_get_one_irq(struct mpic *mpic, struct pt_regs *regs); | |
275 | /* This one gets to the primary mpic */ | |
276 | extern int mpic_get_irq(struct pt_regs *regs); | |
277 | ||
278 | /* global mpic for pSeries */ | |
279 | extern struct mpic *pSeries_mpic; |