x86_64: apic/mpapic.h -> apic/lapic.h
[dragonfly.git] / sys / platform / pc64 / acpica5 / acpi_sdt.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>
38#include <sys/systm.h>
39
40#include <machine/pmap.h>
41#include <machine/smp.h>
42#include <machine/md_var.h>
43#include <machine/specialreg.h>
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44
45#include "acpi_sdt.h"
46#include "acpi_sdt_var.h"
47
48#define SDT_VPRINTF(fmt, arg...) \
49do { \
50 if (bootverbose) \
51 kprintf("ACPI SDT: " fmt , ##arg); \
52} while (0)
53
54#define ACPI_RSDP_EBDA_MAPSZ 1024
55#define ACPI_RSDP_BIOS_MAPSZ 0x20000
56#define ACPI_RSDP_BIOS_MAPADDR 0xe0000
57
58#define ACPI_RSDP_ALIGN 16
59
60#define ACPI_RSDP_SIGLEN 8
61#define ACPI_RSDP_SIG "RSD PTR "
62
63/* Root System Description Pointer */
64struct acpi_rsdp {
65 uint8_t rsdp_sig[ACPI_RSDP_SIGLEN];
66 uint8_t rsdp_cksum;
67 uint8_t rsdp_oem_id[6];
68 uint8_t rsdp_rev;
69 uint32_t rsdp_rsdt;
70 uint32_t rsdp_len;
71 uint64_t rsdp_xsdt;
72 uint8_t rsdp_ext_cksum;
73 uint8_t rsdp_rsvd[3];
74} __packed;
75
76/* Extended System Description Table */
77struct acpi_xsdt {
78 struct acpi_sdth xsdt_hdr;
79 uint64_t xsdt_ents[1];
80} __packed;
81
82/* Root System Description Table */
83struct acpi_rsdt {
84 struct acpi_sdth rsdt_hdr;
85 uint32_t rsdt_ents[1];
86} __packed;
87
88typedef vm_paddr_t (*sdt_search_t)(vm_paddr_t, const uint8_t *);
89
90static const struct acpi_rsdp *sdt_rsdp_search(const uint8_t *, int);
91static vm_paddr_t sdt_search_xsdt(vm_paddr_t, const uint8_t *);
92static vm_paddr_t sdt_search_rsdt(vm_paddr_t, const uint8_t *);
93
94extern u_long ebda_addr;
95
96static sdt_search_t sdt_search_func;
97static vm_paddr_t sdt_search_paddr;
98
99static void
100sdt_probe(void)
101{
102 const struct acpi_rsdp *rsdp;
103 vm_size_t mapsz;
104 uint8_t *ptr;
105
106 if (ebda_addr != 0) {
107 mapsz = ACPI_RSDP_EBDA_MAPSZ;
108 ptr = pmap_mapdev(ebda_addr, mapsz);
109
110 rsdp = sdt_rsdp_search(ptr, mapsz);
111 if (rsdp == NULL) {
112 SDT_VPRINTF("RSDP not in EBDA\n");
113 pmap_unmapdev((vm_offset_t)ptr, mapsz);
114
115 ptr = NULL;
116 mapsz = 0;
117 } else {
118 SDT_VPRINTF("RSDP in EBDA\n");
119 goto found_rsdp;
120 }
121 }
122
123 mapsz = ACPI_RSDP_BIOS_MAPSZ;
124 ptr = pmap_mapdev(ACPI_RSDP_BIOS_MAPADDR, mapsz);
125
126 rsdp = sdt_rsdp_search(ptr, mapsz);
127 if (rsdp == NULL) {
128 kprintf("sdt_probe: no RSDP\n");
129 pmap_unmapdev((vm_offset_t)ptr, mapsz);
130 return;
131 } else {
132 SDT_VPRINTF("RSDP in BIOS mem\n");
133 }
134
135found_rsdp:
136 if (rsdp->rsdp_rev != 2) {
137 sdt_search_func = sdt_search_rsdt;
138 sdt_search_paddr = rsdp->rsdp_rsdt;
139 } else {
140 sdt_search_func = sdt_search_xsdt;
141 sdt_search_paddr = rsdp->rsdp_xsdt;
142 }
143 pmap_unmapdev((vm_offset_t)ptr, mapsz);
144}
145SYSINIT(sdt_probe, SI_BOOT2_PRESMP, SI_ORDER_FIRST, sdt_probe, 0);
146
147static const struct acpi_rsdp *
148sdt_rsdp_search(const uint8_t *target, int size)
149{
150 const struct acpi_rsdp *rsdp;
151 int i;
152
153 KKASSERT(size > sizeof(*rsdp));
154
155 for (i = 0; i < size - sizeof(*rsdp); i += ACPI_RSDP_ALIGN) {
156 rsdp = (const struct acpi_rsdp *)&target[i];
157 if (memcmp(rsdp->rsdp_sig, ACPI_RSDP_SIG,
158 ACPI_RSDP_SIGLEN) == 0)
159 return rsdp;
160 }
161 return NULL;
162}
163
164void *
165sdt_sdth_map(vm_paddr_t paddr)
166{
167 struct acpi_sdth *sdth;
168 vm_size_t mapsz;
169
170 sdth = pmap_mapdev(paddr, sizeof(*sdth));
171 mapsz = sdth->sdth_len;
172 pmap_unmapdev((vm_offset_t)sdth, sizeof(*sdth));
173
174 if (mapsz < sizeof(*sdth))
175 return NULL;
176
177 return pmap_mapdev(paddr, mapsz);
178}
179
180void
181sdt_sdth_unmap(struct acpi_sdth *sdth)
182{
183 pmap_unmapdev((vm_offset_t)sdth, sdth->sdth_len);
184}
185
186static vm_paddr_t
187sdt_search_xsdt(vm_paddr_t xsdt_paddr, const uint8_t *sig)
188{
189 struct acpi_xsdt *xsdt;
190 vm_paddr_t sdt_paddr = 0;
191 int i, nent;
192
193 if (xsdt_paddr == 0) {
194 kprintf("sdt_search_xsdt: XSDT paddr == 0\n");
195 return 0;
196 }
197
198 xsdt = sdt_sdth_map(xsdt_paddr);
199 if (xsdt == NULL) {
200 kprintf("sdt_search_xsdt: can't map XSDT\n");
201 return 0;
202 }
203
204 if (memcmp(xsdt->xsdt_hdr.sdth_sig, ACPI_XSDT_SIG,
205 ACPI_SDTH_SIGLEN) != 0) {
206 kprintf("sdt_search_xsdt: not XSDT\n");
207 goto back;
208 }
209
210 if (xsdt->xsdt_hdr.sdth_rev != 1) {
211 kprintf("sdt_search_xsdt: unsupported XSDT revision %d\n",
212 xsdt->xsdt_hdr.sdth_rev);
213 goto back;
214 }
215
216 nent = (xsdt->xsdt_hdr.sdth_len - sizeof(xsdt->xsdt_hdr)) /
217 sizeof(xsdt->xsdt_ents[0]);
218 for (i = 0; i < nent; ++i) {
219 struct acpi_sdth *sdth;
220
221 if (xsdt->xsdt_ents[i] == 0)
222 continue;
223
224 sdth = sdt_sdth_map(xsdt->xsdt_ents[i]);
225 if (sdth != NULL) {
226 int ret;
227
228 ret = memcmp(sdth->sdth_sig, sig, ACPI_SDTH_SIGLEN);
229 sdt_sdth_unmap(sdth);
230
231 if (ret == 0) {
232 sdt_paddr = xsdt->xsdt_ents[i];
233 break;
234 }
235 }
236 }
237back:
238 sdt_sdth_unmap(&xsdt->xsdt_hdr);
239 return sdt_paddr;
240}
241
242static vm_paddr_t
243sdt_search_rsdt(vm_paddr_t rsdt_paddr, const uint8_t *sig)
244{
245 struct acpi_rsdt *rsdt;
246 vm_paddr_t sdt_paddr = 0;
247 int i, nent;
248
249 if (rsdt_paddr == 0) {
250 kprintf("sdt_search_rsdt: RSDT paddr == 0\n");
251 return 0;
252 }
253
254 rsdt = sdt_sdth_map(rsdt_paddr);
255 if (rsdt == NULL) {
256 kprintf("sdt_search_rsdt: can't map RSDT\n");
257 return 0;
258 }
259
260 if (memcmp(rsdt->rsdt_hdr.sdth_sig, ACPI_RSDT_SIG,
261 ACPI_SDTH_SIGLEN) != 0) {
262 kprintf("sdt_search_rsdt: not RSDT\n");
263 goto back;
264 }
265
266 if (rsdt->rsdt_hdr.sdth_rev != 1) {
267 kprintf("sdt_search_rsdt: unsupported RSDT revision %d\n",
268 rsdt->rsdt_hdr.sdth_rev);
269 goto back;
270 }
271
272 nent = (rsdt->rsdt_hdr.sdth_len - sizeof(rsdt->rsdt_hdr)) /
273 sizeof(rsdt->rsdt_ents[0]);
274 for (i = 0; i < nent; ++i) {
275 struct acpi_sdth *sdth;
276
277 if (rsdt->rsdt_ents[i] == 0)
278 continue;
279
280 sdth = sdt_sdth_map(rsdt->rsdt_ents[i]);
281 if (sdth != NULL) {
282 int ret;
283
284 ret = memcmp(sdth->sdth_sig, sig, ACPI_SDTH_SIGLEN);
285 sdt_sdth_unmap(sdth);
286
287 if (ret == 0) {
288 sdt_paddr = rsdt->rsdt_ents[i];
289 break;
290 }
291 }
292 }
293back:
294 sdt_sdth_unmap(&rsdt->rsdt_hdr);
295 return sdt_paddr;
296}
297
298vm_paddr_t
299sdt_search(const uint8_t *sig)
300{
301 if (sdt_search_func == NULL)
302 return 0;
303 return sdt_search_func(sdt_search_paddr, sig);
304}