apic_vector.s revision 281707 
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: head/sys/i386/i386/apic_vector.s 281707 2015-04-18 21:23:16Z 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 */
50as_lapic_eoi:
51	cmpl	$0,x2apic_mode
52	jne	1f
53	movl	lapic_map,%eax
54	movl	$0,LA_EOI(%eax)
55	ret
561:
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 ;						\
73IDTVEC(vec_name) ;							\
74	PUSH_FRAME ;							\
75	SET_KERNEL_SREGS ;						\
76	cld ;								\
77	FAKE_MCOUNT(TF_EIP(%esp)) ;					\
78	cmpl	$0,x2apic_mode ;					\
79	je	1f ;							\
80	movl	$(MSR_APIC_ISR0 + index),%ecx ;				\
81	rdmsr ;								\
82	jmp	2f ;							\
831: ;									\
84	movl	lapic_map, %edx ;/* pointer to local APIC */		\
85	movl	LA_ISR + 16 * (index)(%edx), %eax ;	/* load ISR */	\
862: ;									\
87	bsrl	%eax, %eax ;	/* index of highest set bit in ISR */	\
88	jz	3f ;							\
89	addl	$(32 * index),%eax ;					\
90	pushl	%esp		;                                       \
91	pushl	%eax ;		/* pass the IRQ */			\
92	call	lapic_handle_intr ;					\
93	addl	$8, %esp ;	/* discard parameter */			\
943: ;									\
95	MEXITCOUNT ;							\
96	jmp	doreti
97
98/*
99 * Handle "spurious INTerrupts".
100 * Notes:
101 *  This is different than the "spurious INTerrupt" generated by an
102 *   8259 PIC for missing INTs.  See the APIC documentation for details.
103 *  This routine should NOT do an 'EOI' cycle.
104 */
105	.text
106	SUPERALIGN_TEXT
107IDTVEC(spuriousint)
108
109	/* No EOI cycle used here */
110
111	iret
112
113	ISR_VEC(1, apic_isr1)
114	ISR_VEC(2, apic_isr2)
115	ISR_VEC(3, apic_isr3)
116	ISR_VEC(4, apic_isr4)
117	ISR_VEC(5, apic_isr5)
118	ISR_VEC(6, apic_isr6)
119	ISR_VEC(7, apic_isr7)
120
121/*
122 * Local APIC periodic timer handler.
123 */
124	.text
125	SUPERALIGN_TEXT
126IDTVEC(timerint)
127	PUSH_FRAME
128	SET_KERNEL_SREGS
129	cld
130	FAKE_MCOUNT(TF_EIP(%esp))
131	pushl	%esp
132	call	lapic_handle_timer
133	add	$4, %esp
134	MEXITCOUNT
135	jmp	doreti
136
137/*
138 * Local APIC CMCI handler.
139 */
140	.text
141	SUPERALIGN_TEXT
142IDTVEC(cmcint)
143	PUSH_FRAME
144	SET_KERNEL_SREGS
145	cld
146	FAKE_MCOUNT(TF_EIP(%esp))
147	call	lapic_handle_cmc
148	MEXITCOUNT
149	jmp	doreti
150
151/*
152 * Local APIC error interrupt handler.
153 */
154	.text
155	SUPERALIGN_TEXT
156IDTVEC(errorint)
157	PUSH_FRAME
158	SET_KERNEL_SREGS
159	cld
160	FAKE_MCOUNT(TF_EIP(%esp))
161	call	lapic_handle_error
162	MEXITCOUNT
163	jmp	doreti
164
165#ifdef XENHVM
166/*
167 * Xen event channel upcall interrupt handler.
168 * Only used when the hypervisor supports direct vector callbacks.
169 */
170	.text
171	SUPERALIGN_TEXT
172IDTVEC(xen_intr_upcall)
173	PUSH_FRAME
174	SET_KERNEL_SREGS
175	cld
176	FAKE_MCOUNT(TF_EIP(%esp))
177	pushl	%esp
178	call	xen_intr_handle_upcall
179	add	$4, %esp
180	MEXITCOUNT
181	jmp	doreti
182#endif
183
184#ifdef SMP
185/*
186 * Global address space TLB shootdown.
187 */
188	.text
189	SUPERALIGN_TEXT
190invltlb_ret:
191	call	as_lapic_eoi
192	POP_FRAME
193	iret
194
195	SUPERALIGN_TEXT
196IDTVEC(invltlb)
197	PUSH_FRAME
198	SET_KERNEL_SREGS
199	cld
200
201	call	invltlb_handler
202
203	jmp	invltlb_ret
204
205/*
206 * Single page TLB shootdown
207 */
208	.text
209	SUPERALIGN_TEXT
210IDTVEC(invlpg)
211	PUSH_FRAME
212	SET_KERNEL_SREGS
213	cld
214
215	call	invlpg_handler
216
217	jmp	invltlb_ret
218
219/*
220 * Page range TLB shootdown.
221 */
222	.text
223	SUPERALIGN_TEXT
224IDTVEC(invlrng)
225	PUSH_FRAME
226	SET_KERNEL_SREGS
227	cld
228
229	call	invlrng_handler
230
231	jmp	invltlb_ret
232
233/*
234 * Invalidate cache.
235 */
236	.text
237	SUPERALIGN_TEXT
238IDTVEC(invlcache)
239	PUSH_FRAME
240	SET_KERNEL_SREGS
241	cld
242
243	call	invlcache_handler
244
245	jmp	invltlb_ret
246
247/*
248 * Handler for IPIs sent via the per-cpu IPI bitmap.
249 */
250#ifndef XEN
251	.text
252	SUPERALIGN_TEXT
253IDTVEC(ipi_intr_bitmap_handler)
254	PUSH_FRAME
255	SET_KERNEL_SREGS
256	cld
257
258	call	as_lapic_eoi
259
260	FAKE_MCOUNT(TF_EIP(%esp))
261
262	call	ipi_bitmap_handler
263	MEXITCOUNT
264	jmp	doreti
265#endif
266/*
267 * Executed by a CPU when it receives an IPI_STOP from another CPU.
268 */
269	.text
270	SUPERALIGN_TEXT
271IDTVEC(cpustop)
272	PUSH_FRAME
273	SET_KERNEL_SREGS
274	cld
275
276	call	as_lapic_eoi
277	call	cpustop_handler
278
279	POP_FRAME
280	iret
281
282/*
283 * Executed by a CPU when it receives an IPI_SUSPEND from another CPU.
284 */
285#ifndef XEN
286	.text
287	SUPERALIGN_TEXT
288IDTVEC(cpususpend)
289	PUSH_FRAME
290	SET_KERNEL_SREGS
291	cld
292
293	call	as_lapic_eoi
294	call	cpususpend_handler
295
296	POP_FRAME
297	jmp	doreti_iret
298#endif
299
300/*
301 * Executed by a CPU when it receives a RENDEZVOUS IPI from another CPU.
302 *
303 * - Calls the generic rendezvous action function.
304 */
305	.text
306	SUPERALIGN_TEXT
307IDTVEC(rendezvous)
308	PUSH_FRAME
309	SET_KERNEL_SREGS
310	cld
311
312#ifdef COUNT_IPIS
313	movl	PCPU(CPUID), %eax
314	movl	ipi_rendezvous_counts(,%eax,4), %eax
315	incl	(%eax)
316#endif
317	call	smp_rendezvous_action
318
319	call	as_lapic_eoi
320	POP_FRAME
321	iret
322
323#endif /* SMP */
324