md5(1): Fix typo.
[dragonfly.git] / sys / platform / pc32 / acpica5 / acpi_fadt.c
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1/*
2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Sepherosa Ziehau <sepherosa@gmail.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
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
16 * distribution.
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.
20 *
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
32 * SUCH DAMAGE.
33 */
34
35#include <sys/param.h>
36#include <sys/bus.h>
37#include <sys/kernel.h>
5e2a2352 38#include <sys/machintr.h>
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39#include <sys/systm.h>
40
41#include <machine/pmap.h>
42#include <machine/smp.h>
43#include <machine/md_var.h>
44#include <machine/specialreg.h>
45#include <machine_base/apic/mpapic.h>
46
47#include "acpi_sdt.h"
48#include "acpi_sdt_var.h"
5e2a2352 49#include "acpi_sci_var.h"
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50
51#define FADT_VPRINTF(fmt, arg...) \
52do { \
53 if (bootverbose) \
54 kprintf("ACPI FADT: " fmt , ##arg); \
55} while (0)
56
57/* Fixed ACPI Description Table */
58struct acpi_fadt {
59 struct acpi_sdth fadt_hdr;
60 uint32_t fadt_fw_ctrl;
61 uint32_t fadt_dsdt;
62 uint8_t fadt_rsvd1;
63 uint8_t fadt_pm_prof;
64 uint16_t fadt_sci_int;
65 uint32_t fadt_smi_cmd;
66 uint8_t fadt_acpi_en;
67 uint8_t fadt_acpi_dis;
68 uint8_t fadt_s4bios;
69 uint8_t fadt_pstate;
70 /* More ... */
71} __packed;
72
5e2a2352 73static int acpi_sci_mode_detect = 0;
05ba9093 74static int acpi_sci_irq = -1;
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75static enum intr_trigger acpi_sci_trig = INTR_TRIGGER_CONFORM;
76static enum intr_polarity acpi_sci_pola = INTR_POLARITY_CONFORM;
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77
78static void
79fadt_probe(void)
80{
81 struct acpi_fadt *fadt;
82 vm_paddr_t fadt_paddr;
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83 enum intr_trigger trig;
84 enum intr_polarity pola;
85 int enabled = 1;
86 char *env;
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87
88 fadt_paddr = sdt_search(ACPI_FADT_SIG);
89 if (fadt_paddr == 0) {
90 kprintf("fadt_probe: can't locate FADT\n");
91 return;
92 }
93
94 fadt = sdt_sdth_map(fadt_paddr);
95 KKASSERT(fadt != NULL);
96
97 /*
98 * FADT in ACPI specification 1.0 - 4.0
99 */
100 if (fadt->fadt_hdr.sdth_rev < 1 || fadt->fadt_hdr.sdth_rev > 4) {
101 kprintf("fadt_probe: unsupported FADT revision %d\n",
102 fadt->fadt_hdr.sdth_rev);
103 goto back;
104 }
105
106 if (fadt->fadt_hdr.sdth_len < sizeof(*fadt)) {
107 kprintf("fadt_probe: invalid FADT length %u\n",
108 fadt->fadt_hdr.sdth_len);
109 goto back;
110 }
111
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112 kgetenv_int("hw.acpi.sci.enabled", &enabled);
113 if (!enabled)
114 goto back;
115
05ba9093 116 acpi_sci_irq = fadt->fadt_sci_int;
05ba9093 117
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118 env = kgetenv("hw.acpi.sci.trigger");
119 if (env == NULL)
120 goto back;
121
122 trig = INTR_TRIGGER_CONFORM;
123 if (strcmp(env, "edge") == 0)
124 trig = INTR_TRIGGER_EDGE;
125 else if (strcmp(env, "level") == 0)
126 trig = INTR_TRIGGER_LEVEL;
127
128 kfreeenv(env);
129
130 if (trig == INTR_TRIGGER_CONFORM)
131 goto back;
132
133 env = kgetenv("hw.acpi.sci.polarity");
134 if (env == NULL)
135 goto back;
136
137 pola = INTR_POLARITY_CONFORM;
138 if (strcmp(env, "high") == 0)
139 pola = INTR_POLARITY_HIGH;
140 else if (strcmp(env, "low") == 0)
141 pola = INTR_POLARITY_LOW;
142
143 kfreeenv(env);
144
145 if (pola == INTR_POLARITY_CONFORM)
146 goto back;
147
148 acpi_sci_trig = trig;
149 acpi_sci_pola = pola;
05ba9093 150back:
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151 if (acpi_sci_irq >= 0) {
152 FADT_VPRINTF("SCI irq %d, %s/%s\n", acpi_sci_irq,
153 intr_str_trigger(acpi_sci_trig),
154 intr_str_polarity(acpi_sci_pola));
155 } else {
156 FADT_VPRINTF("SCI is disabled\n");
157 }
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158 sdt_sdth_unmap(&fadt->fadt_hdr);
159}
160SYSINIT(fadt_probe, SI_BOOT2_PRESMP, SI_ORDER_SECOND, fadt_probe, 0);
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161
162void
163acpi_sci_config(void)
164{
165 KKASSERT(acpi_sci_irq >= 0);
166
167 if (acpi_sci_trig != INTR_TRIGGER_CONFORM) {
168 KKASSERT(acpi_sci_pola != INTR_POLARITY_CONFORM);
169 machintr_intr_config(acpi_sci_irq,
170 acpi_sci_trig, acpi_sci_pola);
171 return;
172 }
173
174 if (!acpi_sci_mode_detect) {
175 /*
176 * XXX
177 * DO NOT configure SCI according to ACPI specification
178 * as level/low. There are so many broken BIOSes that
179 * could generate SCI as level/high, which will cause
180 * interrupt storm on IRQ 9 if we by default configure
181 * SCI as level/low; or BIOSes will generate SCI using
182 * edge trigger, which may cause spurious interrupt
183 * storm on IRQ 7 if 8259 used. So to be safe, we just
184 * configure SCI as edge/high at the cost that power
185 * button may not work at all.
186 */
187 acpi_sci_trig = INTR_TRIGGER_EDGE;
188 acpi_sci_pola = INTR_POLARITY_HIGH;
189
190 machintr_intr_config(acpi_sci_irq,
191 acpi_sci_trig, acpi_sci_pola);
192 return;
193 }
194 /* TODO SCI mode detect */
195}
196
197int
198acpi_sci_enabled(void)
199{
200 if (acpi_sci_irq >= 0)
201 return 1;
202 else
203 return 0;
204}
205
206int
207acpi_sci_pci_shariable(void)
208{
209 if (acpi_sci_irq >= 0 &&
210 acpi_sci_trig == INTR_TRIGGER_LEVEL &&
211 acpi_sci_pola == INTR_POLARITY_LOW)
212 return 1;
213 else
214 return 0;
215}