2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Sepherosa Ziehau <sepherosa@gmail.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include <sys/param.h>
37 #include <sys/interrupt.h>
38 #include <sys/kernel.h>
39 #include <sys/machintr.h>
40 #include <sys/systm.h>
42 #include <machine/pmap.h>
43 #include <machine/smp.h>
44 #include <machine/md_var.h>
45 #include <machine/specialreg.h>
46 #include <machine_base/apic/mpapic.h>
49 #include "acpi_sdt_var.h"
50 #include "acpi_sci_var.h"
52 #define FADT_VPRINTF(fmt, arg...) \
55 kprintf("ACPI FADT: " fmt , ##arg); \
58 /* Fixed ACPI Description Table */
60 struct acpi_sdth fadt_hdr;
61 uint32_t fadt_fw_ctrl;
65 uint16_t fadt_sci_int;
66 uint32_t fadt_smi_cmd;
68 uint8_t fadt_acpi_dis;
74 struct acpi_sci_mode {
75 enum intr_trigger sci_trig;
76 enum intr_polarity sci_pola;
79 static int acpi_sci_irq = -1;
80 static enum intr_trigger acpi_sci_trig = INTR_TRIGGER_CONFORM;
81 static enum intr_polarity acpi_sci_pola = INTR_POLARITY_CONFORM;
83 static const struct acpi_sci_mode acpi_sci_modes[] = {
85 * NOTE: Order is critical
87 { INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW },
88 { INTR_TRIGGER_LEVEL, INTR_POLARITY_HIGH },
89 { INTR_TRIGGER_EDGE, INTR_POLARITY_HIGH },
90 { INTR_TRIGGER_EDGE, INTR_POLARITY_LOW },
92 /* Required last entry */
93 { INTR_TRIGGER_CONFORM, INTR_POLARITY_CONFORM }
99 struct acpi_fadt *fadt;
100 vm_paddr_t fadt_paddr;
101 enum intr_trigger trig;
102 enum intr_polarity pola;
106 fadt_paddr = sdt_search(ACPI_FADT_SIG);
107 if (fadt_paddr == 0) {
108 kprintf("fadt_probe: can't locate FADT\n");
112 fadt = sdt_sdth_map(fadt_paddr);
113 KKASSERT(fadt != NULL);
116 * FADT in ACPI specification 1.0 - 4.0
118 if (fadt->fadt_hdr.sdth_rev < 1 || fadt->fadt_hdr.sdth_rev > 4) {
119 kprintf("fadt_probe: unsupported FADT revision %d\n",
120 fadt->fadt_hdr.sdth_rev);
124 if (fadt->fadt_hdr.sdth_len < sizeof(*fadt)) {
125 kprintf("fadt_probe: invalid FADT length %u\n",
126 fadt->fadt_hdr.sdth_len);
130 kgetenv_int("hw.acpi.sci.enabled", &enabled);
134 acpi_sci_irq = fadt->fadt_sci_int;
136 env = kgetenv("hw.acpi.sci.trigger");
140 trig = INTR_TRIGGER_CONFORM;
141 if (strcmp(env, "edge") == 0)
142 trig = INTR_TRIGGER_EDGE;
143 else if (strcmp(env, "level") == 0)
144 trig = INTR_TRIGGER_LEVEL;
148 if (trig == INTR_TRIGGER_CONFORM)
151 env = kgetenv("hw.acpi.sci.polarity");
155 pola = INTR_POLARITY_CONFORM;
156 if (strcmp(env, "high") == 0)
157 pola = INTR_POLARITY_HIGH;
158 else if (strcmp(env, "low") == 0)
159 pola = INTR_POLARITY_LOW;
163 if (pola == INTR_POLARITY_CONFORM)
166 acpi_sci_trig = trig;
167 acpi_sci_pola = pola;
169 if (acpi_sci_irq >= 0) {
170 FADT_VPRINTF("SCI irq %d, %s/%s\n", acpi_sci_irq,
171 intr_str_trigger(acpi_sci_trig),
172 intr_str_polarity(acpi_sci_pola));
174 FADT_VPRINTF("SCI is disabled\n");
176 sdt_sdth_unmap(&fadt->fadt_hdr);
178 SYSINIT(fadt_probe, SI_BOOT2_PRESMP, SI_ORDER_SECOND, fadt_probe, 0);
181 acpi_sci_dummy_intr(void *dummy __unused, void *frame __unused)
186 acpi_sci_config(void)
188 const struct acpi_sci_mode *mode;
190 if (acpi_sci_irq < 0)
193 if (acpi_sci_trig != INTR_TRIGGER_CONFORM) {
194 KKASSERT(acpi_sci_pola != INTR_POLARITY_CONFORM);
195 machintr_intr_config(acpi_sci_irq,
196 acpi_sci_trig, acpi_sci_pola);
200 kprintf("ACPI FADT: SCI testing interrupt mode ...\n");
201 for (mode = acpi_sci_modes; mode->sci_trig != INTR_TRIGGER_CONFORM;
206 FADT_VPRINTF("SCI testing %s/%s\n",
207 intr_str_trigger(mode->sci_trig),
208 intr_str_polarity(mode->sci_pola));
210 last_cnt = get_interrupt_counter(acpi_sci_irq);
212 machintr_intr_config(acpi_sci_irq,
213 mode->sci_trig, mode->sci_pola);
215 sci_desc = register_int(acpi_sci_irq,
216 acpi_sci_dummy_intr, NULL, "sci", NULL,
217 INTR_EXCL | INTR_CLOCK |
218 INTR_NOPOLL | INTR_MPSAFE | INTR_NOENTROPY);
222 unregister_int(sci_desc);
224 if (get_interrupt_counter(acpi_sci_irq) - last_cnt < 20) {
225 acpi_sci_trig = mode->sci_trig;
226 acpi_sci_pola = mode->sci_pola;
228 kprintf("ACPI FADT: SCI select %s/%s\n",
229 intr_str_trigger(acpi_sci_trig),
230 intr_str_polarity(acpi_sci_pola));
235 kprintf("ACPI FADT: no suitable interrupt mode for SCI, disable\n");
240 acpi_sci_enabled(void)
242 if (acpi_sci_irq >= 0)
249 acpi_sci_pci_shariable(void)
251 if (acpi_sci_irq >= 0 &&
252 acpi_sci_trig == INTR_TRIGGER_LEVEL &&
253 acpi_sci_pola == INTR_POLARITY_LOW)