1
2
3
4
5
6
7
8
9
10
11#include <asm/blackfin.h>
12#include <mach/irq.h>
13#include <linux/linkage.h>
14#include <asm/entry.h>
15#include <asm/asm-offsets.h>
16#include <asm/trace.h>
17#include <asm/traps.h>
18#include <asm/thread_info.h>
19
20#include <asm/context.S>
21
22.extern _ret_from_exception
23
24#ifdef CONFIG_I_ENTRY_L1
25.section .l1.text
26#else
27.text
28#endif
29
30.align 4
31
32
33
34
35
36
37__common_int_entry:
38 [--sp] = fp;
39 [--sp] = usp;
40
41 [--sp] = i0;
42 [--sp] = i1;
43 [--sp] = i2;
44 [--sp] = i3;
45
46 [--sp] = m0;
47 [--sp] = m1;
48 [--sp] = m2;
49 [--sp] = m3;
50
51 [--sp] = l0;
52 [--sp] = l1;
53 [--sp] = l2;
54 [--sp] = l3;
55
56 [--sp] = b0;
57 [--sp] = b1;
58 [--sp] = b2;
59 [--sp] = b3;
60 [--sp] = a0.x;
61 [--sp] = a0.w;
62 [--sp] = a1.x;
63 [--sp] = a1.w;
64
65 [--sp] = LC0;
66 [--sp] = LC1;
67 [--sp] = LT0;
68 [--sp] = LT1;
69 [--sp] = LB0;
70 [--sp] = LB1;
71
72 [--sp] = ASTAT;
73
74 [--sp] = r0;
75 [--sp] = RETS;
76 r2 = RETI;
77 [--sp] = r2;
78 [--sp] = RETX;
79 [--sp] = RETN;
80 [--sp] = RETE;
81 [--sp] = SEQSTAT;
82 [--sp] = r1;
83
84
85#ifdef CONFIG_DEBUG_HWERR
86 r1 = 0x3f;
87 sti r1;
88#else
89 cli r1;
90#endif
91#ifdef CONFIG_TRACE_IRQFLAGS
92 [--sp] = r0;
93 sp += -12;
94 call _trace_hardirqs_off;
95 sp += 12;
96 r0 = [sp++];
97#endif
98 [--sp] = RETI;
99
100 r1 = 0 (x);
101 l0 = r1;
102 l1 = r1;
103 l2 = r1;
104 l3 = r1;
105#ifdef CONFIG_FRAME_POINTER
106 fp = 0;
107#endif
108
109 ANOMALY_283_315_WORKAROUND(p5, r7)
110
111 r1 = sp;
112 SP += -12;
113#ifdef CONFIG_IPIPE
114 call ___ipipe_grab_irq
115 SP += 12;
116 cc = r0 == 0;
117 if cc jump .Lcommon_restore_context;
118#else
119
120#ifdef CONFIG_PREEMPT
121 r7 = sp;
122 r4.l = lo(ALIGN_PAGE_MASK);
123 r4.h = hi(ALIGN_PAGE_MASK);
124 r7 = r7 & r4;
125 p5 = r7;
126 r7 = [p5 + TI_PREEMPT];
127 r7 += 1;
128 [p5 + TI_PREEMPT] = r7;
129#endif
130 pseudo_long_call _do_irq, p2;
131
132#ifdef CONFIG_PREEMPT
133 r7 += -1;
134 [p5 + TI_PREEMPT] = r7;
135#endif
136
137 SP += 12;
138#endif
139 pseudo_long_call _return_from_int, p2;
140.Lcommon_restore_context:
141 RESTORE_CONTEXT
142 rti;
143
144
145ENTRY(_evt_ivhw)
146
147
148
149
150
151 SSYNC;
152 SSYNC;
153
154 SAVE_ALL_SYS
155#ifdef CONFIG_FRAME_POINTER
156 fp = 0;
157#endif
158
159 ANOMALY_283_315_WORKAROUND(p5, r7)
160
161
162
163
164 R0 = 0;
165 R2 = 10;
1661:
167 P0.L = LO(ILAT);
168 P0.H = HI(ILAT);
169 R1 = [P0];
170 CC = BITTST(R1, EVT_IVHW_P);
171 IF ! CC JUMP 2f;
172
173 R1 = EVT_IVHW_P;
174 [P0] = R1;
175 R0 += 1;
176 CC = R1 == R2;
177 if CC JUMP 2f;
178 JUMP 1b;
1792:
180
181 p2.l = lo(IPEND);
182 p2.h = hi(IPEND);
183 r0 = [p2];
184 [sp + PT_IPEND] = r0;
185
186
187 r0 = [sp + PT_SEQSTAT];
188 R1.L = LO(VEC_HWERR);
189 R1.H = HI(VEC_HWERR);
190 R0 = R0 | R1;
191 [sp + PT_SEQSTAT] = R0;
192
193 r0 = sp;
194 SP += -12;
195 pseudo_long_call _trap_c, p5;
196 SP += 12;
197
198#ifdef EBIU_ERRMST
199
200 p0.l = LO(EBIU_ERRMST);
201 p0.h = HI(EBIU_ERRMST);
202 r0.l = (CORE_ERROR | CORE_MERROR);
203 w[p0] = r0.l;
204#endif
205
206 pseudo_long_call _ret_from_exception, p2;
207
208.Lcommon_restore_all_sys:
209 RESTORE_ALL_SYS
210 rti;
211ENDPROC(_evt_ivhw)
212
213
214
215
216
217ENTRY(_evt_nmi)
218#ifndef CONFIG_NMI_WATCHDOG
219.weak _evt_nmi
220#else
221
222 SAVE_ALL_SYS
223 r0 = sp;
224 r1 = retn;
225 [sp + PT_PC] = r1;
226 trace_buffer_save(p4,r5);
227
228 ANOMALY_283_315_WORKAROUND(p4, r5)
229
230 SP += -12;
231 call _do_nmi;
232 SP += 12;
2331:
234 jump 1b;
235#endif
236 rtn;
237ENDPROC(_evt_nmi)
238
239
240ENTRY(_evt_timer)
241 TIMER_INTERRUPT_ENTRY(EVT_IVTMR_P)
242
243
244ENTRY(_evt_evt7)
245 INTERRUPT_ENTRY(EVT_IVG7_P)
246ENTRY(_evt_evt8)
247 INTERRUPT_ENTRY(EVT_IVG8_P)
248ENTRY(_evt_evt9)
249 INTERRUPT_ENTRY(EVT_IVG9_P)
250ENTRY(_evt_evt10)
251 INTERRUPT_ENTRY(EVT_IVG10_P)
252ENTRY(_evt_evt11)
253 INTERRUPT_ENTRY(EVT_IVG11_P)
254ENTRY(_evt_evt12)
255 INTERRUPT_ENTRY(EVT_IVG12_P)
256ENTRY(_evt_evt13)
257 INTERRUPT_ENTRY(EVT_IVG13_P)
258
259
260
261ENTRY(_evt_system_call)
262 SAVE_CONTEXT_SYSCALL
263#ifdef CONFIG_FRAME_POINTER
264 fp = 0;
265#endif
266 pseudo_long_call _system_call, p2;
267 jump .Lcommon_restore_context;
268ENDPROC(_evt_system_call)
269
270#ifdef CONFIG_IPIPE
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296ENTRY(___ipipe_call_irqtail)
297 p0 = r0;
298 r0.l = 1f;
299 r0.h = 1f;
300 reti = r0;
301 rti;
3021:
303 [--sp] = rets;
304 [--sp] = ( r7:4, p5:3 );
305 sp += -12;
306 call (p0);
307 sp += 12;
308 ( r7:4, p5:3 ) = [sp++];
309 rets = [sp++];
310
311#ifdef CONFIG_DEBUG_HWERR
312
313 r0 = (EVT_IVG14 | EVT_IVHW | \
314 EVT_IRPTEN | EVT_EVX | EVT_NMI | EVT_RST | EVT_EMU);
315#else
316
317 r0 = (EVT_IVG14 | \
318 EVT_IRPTEN | EVT_EVX | EVT_NMI | EVT_RST | EVT_EMU);
319#endif
320 sti r0;
321 raise 14;
3222:
323 jump 2b;
324ENDPROC(___ipipe_call_irqtail)
325
326#endif
327