15db2f26eSSascha Wildner /*
25db2f26eSSascha Wildner * Copyright (c) 2009 The DragonFly Project. All rights reserved.
35db2f26eSSascha Wildner *
45db2f26eSSascha Wildner * This code is derived from software contributed to The DragonFly Project
55db2f26eSSascha Wildner * by Sepherosa Ziehau <sepherosa@gmail.com>
65db2f26eSSascha Wildner *
75db2f26eSSascha Wildner * Redistribution and use in source and binary forms, with or without
85db2f26eSSascha Wildner * modification, are permitted provided that the following conditions
95db2f26eSSascha Wildner * are met:
105db2f26eSSascha Wildner *
115db2f26eSSascha Wildner * 1. Redistributions of source code must retain the above copyright
125db2f26eSSascha Wildner * notice, this list of conditions and the following disclaimer.
135db2f26eSSascha Wildner * 2. Redistributions in binary form must reproduce the above copyright
145db2f26eSSascha Wildner * notice, this list of conditions and the following disclaimer in
155db2f26eSSascha Wildner * the documentation and/or other materials provided with the
165db2f26eSSascha Wildner * distribution.
175db2f26eSSascha Wildner * 3. Neither the name of The DragonFly Project nor the names of its
185db2f26eSSascha Wildner * contributors may be used to endorse or promote products derived
195db2f26eSSascha Wildner * from this software without specific, prior written permission.
205db2f26eSSascha Wildner *
215db2f26eSSascha Wildner * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
225db2f26eSSascha Wildner * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
235db2f26eSSascha Wildner * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
245db2f26eSSascha Wildner * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
255db2f26eSSascha Wildner * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
265db2f26eSSascha Wildner * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
275db2f26eSSascha Wildner * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
285db2f26eSSascha Wildner * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
295db2f26eSSascha Wildner * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
305db2f26eSSascha Wildner * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
315db2f26eSSascha Wildner * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
325db2f26eSSascha Wildner * SUCH DAMAGE.
335db2f26eSSascha Wildner */
345db2f26eSSascha Wildner
355db2f26eSSascha Wildner #include <sys/param.h>
365db2f26eSSascha Wildner #include <sys/kernel.h>
375db2f26eSSascha Wildner #include <sys/systm.h>
385db2f26eSSascha Wildner
395db2f26eSSascha Wildner #include <machine/pmap.h>
400bf2586eSImre Vadász #include <machine/vmparam.h>
415db2f26eSSascha Wildner
428d3ef488SSascha Wildner #include <contrib/dev/acpica/source/include/acpi.h>
438d3ef488SSascha Wildner
445db2f26eSSascha Wildner #include "acpi_sdt_var.h"
455db2f26eSSascha Wildner
465db2f26eSSascha Wildner #define SDT_VPRINTF(fmt, arg...) \
475db2f26eSSascha Wildner do { \
485db2f26eSSascha Wildner if (bootverbose) \
495db2f26eSSascha Wildner kprintf("ACPI SDT: " fmt , ##arg); \
505db2f26eSSascha Wildner } while (0)
515db2f26eSSascha Wildner
525db2f26eSSascha Wildner typedef vm_paddr_t (*sdt_search_t)(vm_paddr_t, const uint8_t *);
535db2f26eSSascha Wildner
548d3ef488SSascha Wildner static const ACPI_TABLE_RSDP *sdt_rsdp_search(const uint8_t *, int);
555db2f26eSSascha Wildner static vm_paddr_t sdt_search_xsdt(vm_paddr_t, const uint8_t *);
565db2f26eSSascha Wildner static vm_paddr_t sdt_search_rsdt(vm_paddr_t, const uint8_t *);
575db2f26eSSascha Wildner
585db2f26eSSascha Wildner extern u_long ebda_addr;
595db2f26eSSascha Wildner
605db2f26eSSascha Wildner static sdt_search_t sdt_search_func;
615db2f26eSSascha Wildner static vm_paddr_t sdt_search_paddr;
625db2f26eSSascha Wildner
635db2f26eSSascha Wildner static void
sdt_probe(void)645db2f26eSSascha Wildner sdt_probe(void)
655db2f26eSSascha Wildner {
668d3ef488SSascha Wildner const ACPI_TABLE_RSDP *rsdp;
675db2f26eSSascha Wildner vm_size_t mapsz;
685db2f26eSSascha Wildner uint8_t *ptr;
690bf2586eSImre Vadász u_long rsdp_paddr;
700bf2586eSImre Vadász
710bf2586eSImre Vadász if (kgetenv_ulong("hint.acpi.0.rsdp", &rsdp_paddr) == 1) {
720bf2586eSImre Vadász SDT_VPRINTF("RSDP in kenv hint\n");
730bf2586eSImre Vadász mapsz = PAGE_SIZE;
740bf2586eSImre Vadász ptr = pmap_mapdev(rsdp_paddr, mapsz);
750bf2586eSImre Vadász rsdp = (const ACPI_TABLE_RSDP *)ptr;
760bf2586eSImre Vadász goto found_rsdp;
770bf2586eSImre Vadász }
785db2f26eSSascha Wildner
795db2f26eSSascha Wildner if (ebda_addr != 0) {
808d3ef488SSascha Wildner mapsz = ACPI_EBDA_WINDOW_SIZE;
815db2f26eSSascha Wildner ptr = pmap_mapdev(ebda_addr, mapsz);
825db2f26eSSascha Wildner
835db2f26eSSascha Wildner rsdp = sdt_rsdp_search(ptr, mapsz);
845db2f26eSSascha Wildner if (rsdp == NULL) {
855db2f26eSSascha Wildner SDT_VPRINTF("RSDP not in EBDA\n");
865db2f26eSSascha Wildner pmap_unmapdev((vm_offset_t)ptr, mapsz);
875db2f26eSSascha Wildner
885db2f26eSSascha Wildner ptr = NULL;
895db2f26eSSascha Wildner mapsz = 0;
905db2f26eSSascha Wildner } else {
915db2f26eSSascha Wildner SDT_VPRINTF("RSDP in EBDA\n");
925db2f26eSSascha Wildner goto found_rsdp;
935db2f26eSSascha Wildner }
945db2f26eSSascha Wildner }
955db2f26eSSascha Wildner
968d3ef488SSascha Wildner mapsz = ACPI_HI_RSDP_WINDOW_SIZE;
978d3ef488SSascha Wildner ptr = pmap_mapdev(ACPI_HI_RSDP_WINDOW_BASE, mapsz);
985db2f26eSSascha Wildner
995db2f26eSSascha Wildner rsdp = sdt_rsdp_search(ptr, mapsz);
1005db2f26eSSascha Wildner if (rsdp == NULL) {
1015db2f26eSSascha Wildner kprintf("sdt_probe: no RSDP\n");
1025db2f26eSSascha Wildner pmap_unmapdev((vm_offset_t)ptr, mapsz);
1035db2f26eSSascha Wildner return;
1045db2f26eSSascha Wildner } else {
1055db2f26eSSascha Wildner SDT_VPRINTF("RSDP in BIOS mem\n");
1065db2f26eSSascha Wildner }
1075db2f26eSSascha Wildner
1085db2f26eSSascha Wildner found_rsdp:
1098d3ef488SSascha Wildner if (rsdp->Revision != 2 /* || AcpiGbl_DoNotUseXsdt */) {
1105db2f26eSSascha Wildner sdt_search_func = sdt_search_rsdt;
1118d3ef488SSascha Wildner sdt_search_paddr = rsdp->RsdtPhysicalAddress;
1125db2f26eSSascha Wildner } else {
1135db2f26eSSascha Wildner sdt_search_func = sdt_search_xsdt;
1148d3ef488SSascha Wildner sdt_search_paddr = rsdp->XsdtPhysicalAddress;
1155db2f26eSSascha Wildner }
1165db2f26eSSascha Wildner pmap_unmapdev((vm_offset_t)ptr, mapsz);
1175db2f26eSSascha Wildner }
1185db2f26eSSascha Wildner SYSINIT(sdt_probe, SI_BOOT2_PRESMP, SI_ORDER_FIRST, sdt_probe, 0);
1195db2f26eSSascha Wildner
1208d3ef488SSascha Wildner static const ACPI_TABLE_RSDP *
sdt_rsdp_search(const uint8_t * target,int size)1215db2f26eSSascha Wildner sdt_rsdp_search(const uint8_t *target, int size)
1225db2f26eSSascha Wildner {
1238d3ef488SSascha Wildner const ACPI_TABLE_RSDP *rsdp;
1245db2f26eSSascha Wildner int i;
1255db2f26eSSascha Wildner
1265db2f26eSSascha Wildner KKASSERT(size > sizeof(*rsdp));
1275db2f26eSSascha Wildner
1288d3ef488SSascha Wildner for (i = 0; i < size - sizeof(*rsdp); i += ACPI_RSDP_SCAN_STEP) {
1298d3ef488SSascha Wildner rsdp = (const ACPI_TABLE_RSDP *)&target[i];
1308d3ef488SSascha Wildner if (memcmp(rsdp->Signature, ACPI_SIG_RSDP,
1318d3ef488SSascha Wildner sizeof(rsdp->Signature)) == 0)
1325db2f26eSSascha Wildner return rsdp;
1335db2f26eSSascha Wildner }
1345db2f26eSSascha Wildner return NULL;
1355db2f26eSSascha Wildner }
1365db2f26eSSascha Wildner
1375db2f26eSSascha Wildner void *
sdt_sdth_map(vm_paddr_t paddr)1385db2f26eSSascha Wildner sdt_sdth_map(vm_paddr_t paddr)
1395db2f26eSSascha Wildner {
1408d3ef488SSascha Wildner ACPI_TABLE_HEADER *sdth;
1415db2f26eSSascha Wildner vm_size_t mapsz;
1425db2f26eSSascha Wildner
1435db2f26eSSascha Wildner sdth = pmap_mapdev(paddr, sizeof(*sdth));
1448d3ef488SSascha Wildner mapsz = sdth->Length;
1455db2f26eSSascha Wildner pmap_unmapdev((vm_offset_t)sdth, sizeof(*sdth));
1465db2f26eSSascha Wildner
1475db2f26eSSascha Wildner if (mapsz < sizeof(*sdth))
1485db2f26eSSascha Wildner return NULL;
1495db2f26eSSascha Wildner
1505db2f26eSSascha Wildner return pmap_mapdev(paddr, mapsz);
1515db2f26eSSascha Wildner }
1525db2f26eSSascha Wildner
1535db2f26eSSascha Wildner void
sdt_sdth_unmap(ACPI_TABLE_HEADER * sdth)1548d3ef488SSascha Wildner sdt_sdth_unmap(ACPI_TABLE_HEADER *sdth)
1555db2f26eSSascha Wildner {
1568d3ef488SSascha Wildner pmap_unmapdev((vm_offset_t)sdth, sdth->Length);
1575db2f26eSSascha Wildner }
1585db2f26eSSascha Wildner
1595db2f26eSSascha Wildner static vm_paddr_t
sdt_search_xsdt(vm_paddr_t xsdt_paddr,const uint8_t * sig)1605db2f26eSSascha Wildner sdt_search_xsdt(vm_paddr_t xsdt_paddr, const uint8_t *sig)
1615db2f26eSSascha Wildner {
1628d3ef488SSascha Wildner ACPI_TABLE_XSDT *xsdt;
1635db2f26eSSascha Wildner vm_paddr_t sdt_paddr = 0;
1645db2f26eSSascha Wildner int i, nent;
1655db2f26eSSascha Wildner
1665db2f26eSSascha Wildner if (xsdt_paddr == 0) {
1675db2f26eSSascha Wildner kprintf("sdt_search_xsdt: XSDT paddr == 0\n");
1685db2f26eSSascha Wildner return 0;
1695db2f26eSSascha Wildner }
1705db2f26eSSascha Wildner
1715db2f26eSSascha Wildner xsdt = sdt_sdth_map(xsdt_paddr);
1725db2f26eSSascha Wildner if (xsdt == NULL) {
1735db2f26eSSascha Wildner kprintf("sdt_search_xsdt: can't map XSDT\n");
1745db2f26eSSascha Wildner return 0;
1755db2f26eSSascha Wildner }
1765db2f26eSSascha Wildner
1778d3ef488SSascha Wildner if (memcmp(xsdt->Header.Signature, ACPI_SIG_XSDT,
178*c1776041SSascha Wildner ACPI_NAMESEG_SIZE) != 0) {
1795db2f26eSSascha Wildner kprintf("sdt_search_xsdt: not XSDT\n");
1805db2f26eSSascha Wildner goto back;
1815db2f26eSSascha Wildner }
1825db2f26eSSascha Wildner
1838d3ef488SSascha Wildner if (xsdt->Header.Revision != 1) {
184fa90647aSSepherosa Ziehau kprintf("sdt_search_xsdt: unknown XSDT revision %d\n",
1858d3ef488SSascha Wildner xsdt->Header.Revision);
186fa90647aSSepherosa Ziehau }
187fa90647aSSepherosa Ziehau
1888d3ef488SSascha Wildner if (xsdt->Header.Length < sizeof(xsdt->Header)) {
189fa90647aSSepherosa Ziehau kprintf("sdt_search_xsdt: invalid XSDT length %u\n",
1908d3ef488SSascha Wildner xsdt->Header.Length);
1915db2f26eSSascha Wildner goto back;
1925db2f26eSSascha Wildner }
1935db2f26eSSascha Wildner
1948d3ef488SSascha Wildner nent = (xsdt->Header.Length - sizeof(xsdt->Header)) /
1958d3ef488SSascha Wildner sizeof(xsdt->TableOffsetEntry[0]);
1965db2f26eSSascha Wildner for (i = 0; i < nent; ++i) {
1978d3ef488SSascha Wildner ACPI_TABLE_HEADER *sdth;
1985db2f26eSSascha Wildner
1998d3ef488SSascha Wildner if (xsdt->TableOffsetEntry[i] == 0)
2005db2f26eSSascha Wildner continue;
2015db2f26eSSascha Wildner
2028d3ef488SSascha Wildner sdth = sdt_sdth_map(xsdt->TableOffsetEntry[i]);
2035db2f26eSSascha Wildner if (sdth != NULL) {
2045db2f26eSSascha Wildner int ret;
2055db2f26eSSascha Wildner
206*c1776041SSascha Wildner ret = memcmp(sdth->Signature, sig, ACPI_NAMESEG_SIZE);
2075db2f26eSSascha Wildner sdt_sdth_unmap(sdth);
2085db2f26eSSascha Wildner
2095db2f26eSSascha Wildner if (ret == 0) {
2108d3ef488SSascha Wildner sdt_paddr = xsdt->TableOffsetEntry[i];
2115db2f26eSSascha Wildner break;
2125db2f26eSSascha Wildner }
2135db2f26eSSascha Wildner }
2145db2f26eSSascha Wildner }
2155db2f26eSSascha Wildner back:
2168d3ef488SSascha Wildner sdt_sdth_unmap(&xsdt->Header);
2175db2f26eSSascha Wildner return sdt_paddr;
2185db2f26eSSascha Wildner }
2195db2f26eSSascha Wildner
2205db2f26eSSascha Wildner static vm_paddr_t
sdt_search_rsdt(vm_paddr_t rsdt_paddr,const uint8_t * sig)2215db2f26eSSascha Wildner sdt_search_rsdt(vm_paddr_t rsdt_paddr, const uint8_t *sig)
2225db2f26eSSascha Wildner {
2238d3ef488SSascha Wildner ACPI_TABLE_RSDT *rsdt;
2245db2f26eSSascha Wildner vm_paddr_t sdt_paddr = 0;
2255db2f26eSSascha Wildner int i, nent;
2265db2f26eSSascha Wildner
2275db2f26eSSascha Wildner if (rsdt_paddr == 0) {
2285db2f26eSSascha Wildner kprintf("sdt_search_rsdt: RSDT paddr == 0\n");
2295db2f26eSSascha Wildner return 0;
2305db2f26eSSascha Wildner }
2315db2f26eSSascha Wildner
2325db2f26eSSascha Wildner rsdt = sdt_sdth_map(rsdt_paddr);
2335db2f26eSSascha Wildner if (rsdt == NULL) {
2345db2f26eSSascha Wildner kprintf("sdt_search_rsdt: can't map RSDT\n");
2355db2f26eSSascha Wildner return 0;
2365db2f26eSSascha Wildner }
2375db2f26eSSascha Wildner
2388d3ef488SSascha Wildner if (memcmp(rsdt->Header.Signature, ACPI_SIG_RSDT,
239*c1776041SSascha Wildner ACPI_NAMESEG_SIZE) != 0) {
2405db2f26eSSascha Wildner kprintf("sdt_search_rsdt: not RSDT\n");
2415db2f26eSSascha Wildner goto back;
2425db2f26eSSascha Wildner }
2435db2f26eSSascha Wildner
2448d3ef488SSascha Wildner if (rsdt->Header.Revision != 1) {
245fa90647aSSepherosa Ziehau kprintf("sdt_search_rsdt: unknown RSDT revision %d\n",
2468d3ef488SSascha Wildner rsdt->Header.Revision);
247fa90647aSSepherosa Ziehau }
248fa90647aSSepherosa Ziehau
2498d3ef488SSascha Wildner if (rsdt->Header.Length < sizeof(rsdt->Header)) {
250fa90647aSSepherosa Ziehau kprintf("sdt_search_rsdt: invalid RSDT length %u\n",
2518d3ef488SSascha Wildner rsdt->Header.Length);
2525db2f26eSSascha Wildner goto back;
2535db2f26eSSascha Wildner }
2545db2f26eSSascha Wildner
2558d3ef488SSascha Wildner nent = (rsdt->Header.Length - sizeof(rsdt->Header)) /
2568d3ef488SSascha Wildner sizeof(rsdt->TableOffsetEntry[0]);
2575db2f26eSSascha Wildner for (i = 0; i < nent; ++i) {
2588d3ef488SSascha Wildner ACPI_TABLE_HEADER *sdth;
2595db2f26eSSascha Wildner
2608d3ef488SSascha Wildner if (rsdt->TableOffsetEntry[i] == 0)
2615db2f26eSSascha Wildner continue;
2625db2f26eSSascha Wildner
2638d3ef488SSascha Wildner sdth = sdt_sdth_map(rsdt->TableOffsetEntry[i]);
2645db2f26eSSascha Wildner if (sdth != NULL) {
2655db2f26eSSascha Wildner int ret;
2665db2f26eSSascha Wildner
267*c1776041SSascha Wildner ret = memcmp(sdth->Signature, sig, ACPI_NAMESEG_SIZE);
2685db2f26eSSascha Wildner sdt_sdth_unmap(sdth);
2695db2f26eSSascha Wildner
2705db2f26eSSascha Wildner if (ret == 0) {
2718d3ef488SSascha Wildner sdt_paddr = rsdt->TableOffsetEntry[i];
2725db2f26eSSascha Wildner break;
2735db2f26eSSascha Wildner }
2745db2f26eSSascha Wildner }
2755db2f26eSSascha Wildner }
2765db2f26eSSascha Wildner back:
2778d3ef488SSascha Wildner sdt_sdth_unmap(&rsdt->Header);
2785db2f26eSSascha Wildner return sdt_paddr;
2795db2f26eSSascha Wildner }
2805db2f26eSSascha Wildner
2815db2f26eSSascha Wildner vm_paddr_t
sdt_search(const uint8_t * sig)2825db2f26eSSascha Wildner sdt_search(const uint8_t *sig)
2835db2f26eSSascha Wildner {
2845db2f26eSSascha Wildner if (sdt_search_func == NULL)
2855db2f26eSSascha Wildner return 0;
2865db2f26eSSascha Wildner return sdt_search_func(sdt_search_paddr, sig);
2875db2f26eSSascha Wildner }
288