1 /*-
2 * Copyright (c) 1989, 1990 William F. Jolitz.
3 * Copyright (c) 1990 The Regents of the University of California.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 4. Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * from: vector.s, 386BSD 0.1 unknown origin
31 * $FreeBSD: releng/11.2/sys/i386/i386/apic_vector.s 329462 2018-02-17 18:00:01Z kib $
32 */
33
34 /*
35 * Interrupt entry points for external interrupts triggered by I/O APICs
36 * as well as IPI handlers.
37 */
38
39 #include "opt_smp.h"
40
41 #include <machine/asmacros.h>
42 #include <machine/specialreg.h>
43 #include <x86/apicreg.h>
44
45 #include "assym.s"
46
47 .text
48 SUPERALIGN_TEXT
49 /* End Of Interrupt to APIC */
50 as_lapic_eoi:
51 cmpl $0,x2apic_mode
52 jne 1f
53 movl lapic_map,%eax
54 movl $0,LA_EOI(%eax)
55 ret
56 1:
57 movl $MSR_APIC_EOI,%ecx
58 xorl %eax,%eax
59 xorl %edx,%edx
60 wrmsr
61 ret
62
63 /*
64 * I/O Interrupt Entry Point. Rather than having one entry point for
65 * each interrupt source, we use one entry point for each 32-bit word
66 * in the ISR. The handler determines the highest bit set in the ISR,
67 * translates that into a vector, and passes the vector to the
68 * lapic_handle_intr() function.
69 */
70 #define ISR_VEC(index, vec_name) \
71 .text ; \
72 SUPERALIGN_TEXT ; \
73 IDTVEC(vec_name ## _pti) ; \
74 IDTVEC(vec_name) ; \
75 PUSH_FRAME ; \
76 SET_KERNEL_SREGS ; \
77 cld ; \
78 FAKE_MCOUNT(TF_EIP(%esp)) ; \
79 cmpl $0,x2apic_mode ; \
80 je 1f ; \
81 movl $(MSR_APIC_ISR0 + index),%ecx ; \
82 rdmsr ; \
83 jmp 2f ; \
84 1: ; \
85 movl lapic_map, %edx ;/* pointer to local APIC */ \
86 movl LA_ISR + 16 * (index)(%edx), %eax ; /* load ISR */ \
87 2: ; \
88 bsrl %eax, %eax ; /* index of highest set bit in ISR */ \
89 jz 3f ; \
90 addl $(32 * index),%eax ; \
91 pushl %esp ; \
92 pushl %eax ; /* pass the IRQ */ \
93 call lapic_handle_intr ; \
94 addl $8, %esp ; /* discard parameter */ \
95 3: ; \
96 MEXITCOUNT ; \
97 jmp doreti
98
99 /*
100 * Handle "spurious INTerrupts".
101 * Notes:
102 * This is different than the "spurious INTerrupt" generated by an
103 * 8259 PIC for missing INTs. See the APIC documentation for details.
104 * This routine should NOT do an 'EOI' cycle.
105 */
106 .text
107 SUPERALIGN_TEXT
108 IDTVEC(spuriousint)
109
110 /* No EOI cycle used here */
111
112 iret
113
114 ISR_VEC(1, apic_isr1)
115 ISR_VEC(2, apic_isr2)
116 ISR_VEC(3, apic_isr3)
117 ISR_VEC(4, apic_isr4)
118 ISR_VEC(5, apic_isr5)
119 ISR_VEC(6, apic_isr6)
120 ISR_VEC(7, apic_isr7)
121
122 /*
123 * Local APIC periodic timer handler.
124 */
125 .text
126 SUPERALIGN_TEXT
127 IDTVEC(timerint_pti)
128 IDTVEC(timerint)
129 PUSH_FRAME
130 SET_KERNEL_SREGS
131 cld
132 FAKE_MCOUNT(TF_EIP(%esp))
133 pushl %esp
134 call lapic_handle_timer
135 add $4, %esp
136 MEXITCOUNT
137 jmp doreti
138
139 /*
140 * Local APIC CMCI handler.
141 */
142 .text
143 SUPERALIGN_TEXT
144 IDTVEC(cmcint_pti)
145 IDTVEC(cmcint)
146 PUSH_FRAME
147 SET_KERNEL_SREGS
148 cld
149 FAKE_MCOUNT(TF_EIP(%esp))
150 call lapic_handle_cmc
151 MEXITCOUNT
152 jmp doreti
153
154 /*
155 * Local APIC error interrupt handler.
156 */
157 .text
158 SUPERALIGN_TEXT
159 IDTVEC(errorint_pti)
160 IDTVEC(errorint)
161 PUSH_FRAME
162 SET_KERNEL_SREGS
163 cld
164 FAKE_MCOUNT(TF_EIP(%esp))
165 call lapic_handle_error
166 MEXITCOUNT
167 jmp doreti
168
169 #ifdef XENHVM
170 /*
171 * Xen event channel upcall interrupt handler.
172 * Only used when the hypervisor supports direct vector callbacks.
173 */
174 .text
175 SUPERALIGN_TEXT
176 IDTVEC(xen_intr_upcall)
177 PUSH_FRAME
178 SET_KERNEL_SREGS
179 cld
180 FAKE_MCOUNT(TF_EIP(%esp))
181 pushl %esp
182 call xen_intr_handle_upcall
183 add $4, %esp
184 MEXITCOUNT
185 jmp doreti
186 #endif
187
188 #ifdef SMP
189 /*
190 * Global address space TLB shootdown.
191 */
192 .text
193 SUPERALIGN_TEXT
194 invltlb_ret:
195 call as_lapic_eoi
196 jmp doreti
197
198 SUPERALIGN_TEXT
199 IDTVEC(invltlb)
200 PUSH_FRAME
201 SET_KERNEL_SREGS
202 cld
203
204 call invltlb_handler
205
206 jmp invltlb_ret
207
208 /*
209 * Single page TLB shootdown
210 */
211 .text
212 SUPERALIGN_TEXT
213 IDTVEC(invlpg)
214 PUSH_FRAME
215 SET_KERNEL_SREGS
216 cld
217
218 call invlpg_handler
219
220 jmp invltlb_ret
221
222 /*
223 * Page range TLB shootdown.
224 */
225 .text
226 SUPERALIGN_TEXT
227 IDTVEC(invlrng)
228 PUSH_FRAME
229 SET_KERNEL_SREGS
230 cld
231
232 call invlrng_handler
233
234 jmp invltlb_ret
235
236 /*
237 * Invalidate cache.
238 */
239 .text
240 SUPERALIGN_TEXT
241 IDTVEC(invlcache)
242 PUSH_FRAME
243 SET_KERNEL_SREGS
244 cld
245
246 call invlcache_handler
247
248 jmp invltlb_ret
249
250 /*
251 * Handler for IPIs sent via the per-cpu IPI bitmap.
252 */
253 .text
254 SUPERALIGN_TEXT
255 IDTVEC(ipi_intr_bitmap_handler)
256 PUSH_FRAME
257 SET_KERNEL_SREGS
258 cld
259
260 call as_lapic_eoi
261
262 FAKE_MCOUNT(TF_EIP(%esp))
263
264 call ipi_bitmap_handler
265 MEXITCOUNT
266 jmp doreti
267
268 /*
269 * Executed by a CPU when it receives an IPI_STOP from another CPU.
270 */
271 .text
272 SUPERALIGN_TEXT
273 IDTVEC(cpustop)
274 PUSH_FRAME
275 SET_KERNEL_SREGS
276 cld
277
278 call as_lapic_eoi
279 call cpustop_handler
280 jmp doreti
281
282 /*
283 * Executed by a CPU when it receives an IPI_SUSPEND from another CPU.
284 */
285 .text
286 SUPERALIGN_TEXT
287 IDTVEC(cpususpend)
288 PUSH_FRAME
289 SET_KERNEL_SREGS
290 cld
291
292 call as_lapic_eoi
293 call cpususpend_handler
294 jmp doreti
295
296 /*
297 * Executed by a CPU when it receives a RENDEZVOUS IPI from another CPU.
298 *
299 * - Calls the generic rendezvous action function.
300 */
301 .text
302 SUPERALIGN_TEXT
303 IDTVEC(rendezvous)
304 PUSH_FRAME
305 SET_KERNEL_SREGS
306 cld
307
308 #ifdef COUNT_IPIS
309 movl PCPU(CPUID), %eax
310 movl ipi_rendezvous_counts(,%eax,4), %eax
311 incl (%eax)
312 #endif
313 call smp_rendezvous_action
314
315 call as_lapic_eoi
316 jmp doreti
317
318 #endif /* SMP */
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