1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
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 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #ifndef _X86_APICVAR_H_
29 #define _X86_APICVAR_H_
30
31 /*
32 * Local && I/O APIC variable definitions.
33 */
34
35 /*
36 * Layout of local APIC interrupt vectors:
37 *
38 * 0xff (255) +-------------+
39 * | | 15 (Spurious / IPIs / Local Interrupts)
40 * 0xf0 (240) +-------------+
41 * | | 14 (I/O Interrupts / Timer)
42 * 0xe0 (224) +-------------+
43 * | | 13 (I/O Interrupts)
44 * 0xd0 (208) +-------------+
45 * | | 12 (I/O Interrupts)
46 * 0xc0 (192) +-------------+
47 * | | 11 (I/O Interrupts)
48 * 0xb0 (176) +-------------+
49 * | | 10 (I/O Interrupts)
50 * 0xa0 (160) +-------------+
51 * | | 9 (I/O Interrupts)
52 * 0x90 (144) +-------------+
53 * | | 8 (I/O Interrupts / System Calls)
54 * 0x80 (128) +-------------+
55 * | | 7 (I/O Interrupts)
56 * 0x70 (112) +-------------+
57 * | | 6 (I/O Interrupts)
58 * 0x60 (96) +-------------+
59 * | | 5 (I/O Interrupts)
60 * 0x50 (80) +-------------+
61 * | | 4 (I/O Interrupts)
62 * 0x40 (64) +-------------+
63 * | | 3 (I/O Interrupts)
64 * 0x30 (48) +-------------+
65 * | | 2 (ATPIC Interrupts)
66 * 0x20 (32) +-------------+
67 * | | 1 (Exceptions, traps, faults, etc.)
68 * 0x10 (16) +-------------+
69 * | | 0 (Exceptions, traps, faults, etc.)
70 * 0x00 (0) +-------------+
71 *
72 * Note: 0x80 needs to be handled specially and not allocated to an
73 * I/O device!
74 */
75
76 #define xAPIC_MAX_APIC_ID 0xfe
77 #define xAPIC_ID_ALL 0xff
78 #define MAX_APIC_ID 0x800
79 #define APIC_ID_ALL 0xffffffff
80
81 /*
82 * The 0xff ID is used for broadcast IPIs for local APICs when not using
83 * x2APIC. IPIs are not sent to I/O APICs so it's acceptable for an I/O APIC
84 * to use that ID.
85 */
86 #define IOAPIC_MAX_ID 0xff
87
88 /* I/O Interrupts are used for external devices such as ISA, PCI, etc. */
89 #define APIC_IO_INTS (IDT_IO_INTS + 16)
90 #define APIC_NUM_IOINTS 191
91
92 /* The timer interrupt is used for clock handling and drives hardclock, etc. */
93 #define APIC_TIMER_INT (APIC_IO_INTS + APIC_NUM_IOINTS)
94
95 /*
96 ********************* !!! WARNING !!! ******************************
97 * Each local apic has an interrupt receive fifo that is two entries deep
98 * for each interrupt priority class (higher 4 bits of interrupt vector).
99 * Once the fifo is full the APIC can no longer receive interrupts for this
100 * class and sending IPIs from other CPUs will be blocked.
101 * To avoid deadlocks there should be no more than two IPI interrupts
102 * pending at the same time.
103 * Currently this is guaranteed by dividing the IPIs in two groups that have
104 * each at most one IPI interrupt pending. The first group is protected by the
105 * smp_ipi_mtx and waits for the completion of the IPI (Only one IPI user
106 * at a time) The second group uses a single interrupt and a bitmap to avoid
107 * redundant IPI interrupts.
108 */
109
110 /* Interrupts for local APIC LVT entries other than the timer. */
111 #define APIC_LOCAL_INTS 240
112 #define APIC_ERROR_INT APIC_LOCAL_INTS
113 #define APIC_THERMAL_INT (APIC_LOCAL_INTS + 1)
114 #define APIC_CMC_INT (APIC_LOCAL_INTS + 2)
115 #define APIC_IPI_INTS (APIC_LOCAL_INTS + 3)
116
117 #define IPI_RENDEZVOUS (APIC_IPI_INTS) /* Inter-CPU rendezvous. */
118 #define IPI_INVLOP (APIC_IPI_INTS + 1) /* TLB Shootdown IPIs, amd64 */
119 #define IPI_INVLTLB (APIC_IPI_INTS + 1) /* TLB Shootdown IPIs, i386 */
120 #define IPI_INVLPG (APIC_IPI_INTS + 2)
121 #define IPI_INVLRNG (APIC_IPI_INTS + 3)
122 #define IPI_INVLCACHE (APIC_IPI_INTS + 4)
123 /* Vector to handle bitmap based IPIs */
124 #define IPI_BITMAP_VECTOR (APIC_IPI_INTS + 5)
125
126 /* IPIs handled by IPI_BITMAP_VECTOR */
127 #define IPI_AST 0 /* Generate software trap. */
128 #define IPI_PREEMPT 1
129 #define IPI_HARDCLOCK 2
130 #define IPI_TRACE 3 /* Collect stack trace. */
131 #define IPI_BITMAP_LAST IPI_TRACE
132 #define IPI_IS_BITMAPED(x) ((x) <= IPI_BITMAP_LAST)
133
134 #define IPI_STOP (APIC_IPI_INTS + 6) /* Stop CPU until restarted. */
135 #define IPI_SUSPEND (APIC_IPI_INTS + 7) /* Suspend CPU until restarted. */
136 #define IPI_SWI (APIC_IPI_INTS + 8) /* Run clk_intr_event. */
137 #define IPI_DYN_FIRST (APIC_IPI_INTS + 9)
138 #define IPI_DYN_LAST (254) /* IPIs allocated at runtime */
139
140 /*
141 * IPI_STOP_HARD does not need to occupy a slot in the IPI vector space since
142 * it is delivered using an NMI anyways.
143 */
144 #define IPI_NMI_FIRST 255
145 #define IPI_STOP_HARD 255 /* Stop CPU with a NMI. */
146
147 /*
148 * The spurious interrupt can share the priority class with the IPIs since
149 * it is not a normal interrupt. (Does not use the APIC's interrupt fifo)
150 */
151 #define APIC_SPURIOUS_INT 255
152
153 #ifndef LOCORE
154
155 #define APIC_IPI_DEST_SELF -1
156 #define APIC_IPI_DEST_ALL -2
157 #define APIC_IPI_DEST_OTHERS -3
158
159 #define APIC_BUS_UNKNOWN -1
160 #define APIC_BUS_ISA 0
161 #define APIC_BUS_EISA 1
162 #define APIC_BUS_PCI 2
163 #define APIC_BUS_MAX APIC_BUS_PCI
164
165 #define IRQ_EXTINT -1
166 #define IRQ_NMI -2
167 #define IRQ_SMI -3
168 #define IRQ_DISABLED -4
169
170 /*
171 * An APIC enumerator is a pseudo bus driver that enumerates APIC's including
172 * CPU's and I/O APIC's.
173 */
174 struct apic_enumerator {
175 const char *apic_name;
176 int (*apic_probe)(void);
177 int (*apic_probe_cpus)(void);
178 int (*apic_setup_local)(void);
179 int (*apic_setup_io)(void);
180 SLIST_ENTRY(apic_enumerator) apic_next;
181 };
182
183 inthand_t
184 IDTVEC(apic_isr1), IDTVEC(apic_isr2), IDTVEC(apic_isr3),
185 IDTVEC(apic_isr4), IDTVEC(apic_isr5), IDTVEC(apic_isr6),
186 IDTVEC(apic_isr7), IDTVEC(cmcint), IDTVEC(errorint),
187 IDTVEC(spuriousint), IDTVEC(timerint),
188 IDTVEC(apic_isr1_pti), IDTVEC(apic_isr2_pti), IDTVEC(apic_isr3_pti),
189 IDTVEC(apic_isr4_pti), IDTVEC(apic_isr5_pti), IDTVEC(apic_isr6_pti),
190 IDTVEC(apic_isr7_pti), IDTVEC(cmcint_pti), IDTVEC(errorint_pti),
191 IDTVEC(spuriousint_pti), IDTVEC(timerint_pti);
192
193 extern vm_paddr_t lapic_paddr;
194 extern int *apic_cpuids;
195
196 /* Allow to replace the lapic_ipi_vectored implementation. */
197 extern void (*ipi_vectored)(u_int, int);
198
199 void apic_register_enumerator(struct apic_enumerator *enumerator);
200 void *ioapic_create(vm_paddr_t addr, int32_t apic_id, int intbase);
201 int ioapic_disable_pin(void *cookie, u_int pin);
202 int ioapic_get_vector(void *cookie, u_int pin);
203 void ioapic_register(void *cookie);
204 int ioapic_remap_vector(void *cookie, u_int pin, int vector);
205 int ioapic_set_bus(void *cookie, u_int pin, int bus_type);
206 int ioapic_set_extint(void *cookie, u_int pin);
207 int ioapic_set_nmi(void *cookie, u_int pin);
208 int ioapic_set_polarity(void *cookie, u_int pin, enum intr_polarity pol);
209 int ioapic_set_triggermode(void *cookie, u_int pin,
210 enum intr_trigger trigger);
211 int ioapic_set_smi(void *cookie, u_int pin);
212
213 void lapic_create(u_int apic_id, int boot_cpu);
214 void lapic_init(vm_paddr_t addr);
215 void lapic_xapic_mode(void);
216 bool lapic_is_x2apic(void);
217 void lapic_setup(int boot);
218 void lapic_dump(const char *str);
219 void lapic_disable(void);
220 void lapic_eoi(void);
221 int lapic_id(void);
222 int lapic_intr_pending(u_int vector);
223 /* XXX: UNUSED */
224 void lapic_set_logical_id(u_int apic_id, u_int cluster, u_int cluster_id);
225 u_int apic_cpuid(u_int apic_id);
226 u_int apic_alloc_vector(u_int apic_id, u_int irq);
227 u_int apic_alloc_vectors(u_int apic_id, u_int *irqs, u_int count, u_int align);
228 void apic_enable_vector(u_int apic_id, u_int vector);
229 void apic_disable_vector(u_int apic_id, u_int vector);
230 void apic_free_vector(u_int apic_id, u_int vector, u_int irq);
231 void lapic_calibrate_timer(void);
232 int lapic_enable_pmc(void);
233 void lapic_disable_pmc(void);
234 void lapic_reenable_pmc(void);
235 void lapic_enable_cmc(void);
236 int lapic_enable_mca_elvt(void);
237 void lapic_ipi_raw(register_t icrlo, u_int dest);
238
239 static inline void
lapic_ipi_vectored(u_int vector,int dest)240 lapic_ipi_vectored(u_int vector, int dest)
241 {
242
243 ipi_vectored(vector, dest);
244 }
245
246 int lapic_ipi_wait(int delay);
247 int lapic_ipi_alloc(inthand_t *ipifunc);
248 void lapic_ipi_free(int vector);
249 int lapic_set_lvt_mask(u_int apic_id, u_int lvt, u_char masked);
250 int lapic_set_lvt_mode(u_int apic_id, u_int lvt, u_int32_t mode);
251 int lapic_set_lvt_polarity(u_int apic_id, u_int lvt,
252 enum intr_polarity pol);
253 int lapic_set_lvt_triggermode(u_int apic_id, u_int lvt,
254 enum intr_trigger trigger);
255 void lapic_handle_cmc(void);
256 void lapic_handle_error(void);
257 void lapic_handle_intr(int vector, struct trapframe *frame);
258 void lapic_handle_timer(struct trapframe *frame);
259
260 int ioapic_get_rid(u_int apic_id, uint16_t *ridp);
261
262 extern int x2apic_mode;
263 extern int lapic_eoi_suppression;
264
265 #ifdef _SYS_SYSCTL_H_
266 SYSCTL_DECL(_hw_apic);
267 #endif
268
269 #endif /* !LOCORE */
270 #endif /* _X86_APICVAR_H_ */
271