acpi_machdep.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2001 Mitsuru IWASAKI
    5  * All rights reserved.
    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  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 #include <sys/param.h>
   33 #include <sys/bus.h>
   34 #include <sys/kernel.h>
   35 #include <sys/module.h>
   36 #include <sys/sysctl.h>
   37 
   38 #include <vm/vm.h>
   39 #include <vm/pmap.h>
   40 
   41 #include <contrib/dev/acpica/include/acpi.h>
   42 #include <contrib/dev/acpica/include/accommon.h>
   43 #include <contrib/dev/acpica/include/actables.h>
   44 
   45 #include <dev/acpica/acpivar.h>
   46 
   47 #include <machine/nexusvar.h>
   48 
   49 uint32_t acpi_resume_beep;
   50 SYSCTL_UINT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RWTUN, &acpi_resume_beep,
   51     0, "Beep the PC speaker when resuming");
   52 
   53 uint32_t acpi_reset_video;
   54 TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video);
   55 
   56 static int intr_model = ACPI_INTR_PIC;
   57 
   58 int
   59 acpi_machdep_init(device_t dev)
   60 {
   61         struct acpi_softc *sc;
   62 
   63         sc = device_get_softc(dev);
   64 
   65         acpi_apm_init(sc);
   66         acpi_install_wakeup_handler(sc);
   67 
   68         if (intr_model == ACPI_INTR_PIC)
   69                 BUS_CONFIG_INTR(dev, AcpiGbl_FADT.SciInterrupt,
   70                     INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW);
   71         else
   72                 acpi_SetIntrModel(intr_model);
   73 
   74         SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx,
   75             SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
   76             "reset_video", CTLFLAG_RW, &acpi_reset_video, 0,
   77             "Call the VESA reset BIOS vector on the resume path");
   78 
   79         return (0);
   80 }
   81 
   82 void
   83 acpi_SetDefaultIntrModel(int model)
   84 {
   85 
   86         intr_model = model;
   87 }
   88 
   89 /* Check BIOS date.  If 1998 or older, disable ACPI. */
   90 int
   91 acpi_machdep_quirks(int *quirks)
   92 {
   93         char *va;
   94         int year;
   95 
   96         /* BIOS address 0xffff5 contains the date in the format mm/dd/yy. */
   97         va = pmap_mapbios(0xffff0, 16);
   98         sscanf(va + 11, "%2d", &year);
   99         pmap_unmapbios((vm_offset_t)va, 16);
  100 
  101         /* 
  102          * Date must be >= 1/1/1999 or we don't trust ACPI.  Note that this
  103          * check must be changed by my 114th birthday.
  104          */
  105         if (year > 90 && year < 99)
  106                 *quirks = ACPI_Q_BROKEN;
  107 
  108         return (0);
  109 }
  110 
  111 /*
  112  * Map a table.  First map the header to determine the table length and then map
  113  * the entire table.
  114  */
  115 static void *
  116 map_table(vm_paddr_t pa, const char *sig)
  117 {
  118         ACPI_TABLE_HEADER *header;
  119         vm_offset_t length;
  120         void *table;
  121 
  122         header = pmap_mapbios(pa, sizeof(ACPI_TABLE_HEADER));
  123         if (strncmp(header->Signature, sig, ACPI_NAMESEG_SIZE) != 0) {
  124                 pmap_unmapbios((vm_offset_t)header, sizeof(ACPI_TABLE_HEADER));
  125                 return (NULL);
  126         }
  127         length = header->Length;
  128         pmap_unmapbios((vm_offset_t)header, sizeof(ACPI_TABLE_HEADER));
  129         table = pmap_mapbios(pa, length);
  130         if (ACPI_FAILURE(AcpiTbChecksum(table, length))) {
  131                 if (bootverbose)
  132                         printf("ACPI: Failed checksum for table %s\n", sig);
  133 #if (ACPI_CHECKSUM_ABORT)
  134                 pmap_unmapbios((vm_offset_t)table, length);
  135                 return (NULL);
  136 #endif
  137         }
  138         return (table);
  139 }
  140 
  141 /*
  142  * See if a given ACPI table is the requested table.  Returns the
  143  * length of the able if it matches or zero on failure.
  144  */
  145 static int
  146 probe_table(vm_paddr_t address, const char *sig)
  147 {
  148         ACPI_TABLE_HEADER *table;
  149         int ret;
  150 
  151         table = pmap_mapbios(address, sizeof(ACPI_TABLE_HEADER));
  152         ret = strncmp(table->Signature, sig, ACPI_NAMESEG_SIZE) == 0;
  153         pmap_unmapbios((vm_offset_t)table, sizeof(ACPI_TABLE_HEADER));
  154         return (ret);
  155 }
  156 
  157 /*
  158  * Try to map a table at a given physical address previously returned
  159  * by acpi_find_table().
  160  */
  161 void *
  162 acpi_map_table(vm_paddr_t pa, const char *sig)
  163 {
  164 
  165         return (map_table(pa, sig));
  166 }
  167 
  168 /* Unmap a table previously mapped via acpi_map_table(). */
  169 void
  170 acpi_unmap_table(void *table)
  171 {
  172         ACPI_TABLE_HEADER *header;
  173 
  174         header = (ACPI_TABLE_HEADER *)table;
  175         pmap_unmapbios((vm_offset_t)table, header->Length);
  176 }
  177 
  178 /*
  179  * Return the physical address of the requested table or zero if one
  180  * is not found.
  181  */
  182 vm_paddr_t
  183 acpi_find_table(const char *sig)
  184 {
  185         ACPI_PHYSICAL_ADDRESS rsdp_ptr;
  186         ACPI_TABLE_RSDP *rsdp;
  187         ACPI_TABLE_RSDT *rsdt;
  188         ACPI_TABLE_XSDT *xsdt;
  189         ACPI_TABLE_HEADER *table;
  190         vm_paddr_t addr;
  191         int i, count;
  192 
  193         if (resource_disabled("acpi", 0))
  194                 return (0);
  195 
  196         /*
  197          * Map in the RSDP.  Since ACPI uses AcpiOsMapMemory() which in turn
  198          * calls pmap_mapbios() to find the RSDP, we assume that we can use
  199          * pmap_mapbios() to map the RSDP.
  200          */
  201         if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
  202                 return (0);
  203         rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP));
  204         if (rsdp == NULL) {
  205                 if (bootverbose)
  206                         printf("ACPI: Failed to map RSDP\n");
  207                 return (0);
  208         }
  209 
  210         /*
  211          * For ACPI >= 2.0, use the XSDT if it is available.
  212          * Otherwise, use the RSDT.
  213          */
  214         addr = 0;
  215         if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) {
  216                 /*
  217                  * AcpiOsGetRootPointer only verifies the checksum for
  218                  * the version 1.0 portion of the RSDP.  Version 2.0 has
  219                  * an additional checksum that we verify first.
  220                  */
  221                 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) {
  222                         if (bootverbose)
  223                                 printf("ACPI: RSDP failed extended checksum\n");
  224                         return (0);
  225                 }
  226                 xsdt = map_table(rsdp->XsdtPhysicalAddress, ACPI_SIG_XSDT);
  227                 if (xsdt == NULL) {
  228                         if (bootverbose)
  229                                 printf("ACPI: Failed to map XSDT\n");
  230                         return (0);
  231                 }
  232                 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
  233                     sizeof(UINT64);
  234                 for (i = 0; i < count; i++)
  235                         if (probe_table(xsdt->TableOffsetEntry[i], sig)) {
  236                                 addr = xsdt->TableOffsetEntry[i];
  237                                 break;
  238                         }
  239                 acpi_unmap_table(xsdt);
  240         } else {
  241                 rsdt = map_table(rsdp->RsdtPhysicalAddress, ACPI_SIG_RSDT);
  242                 if (rsdt == NULL) {
  243                         if (bootverbose)
  244                                 printf("ACPI: Failed to map RSDT\n");
  245                         return (0);
  246                 }
  247                 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
  248                     sizeof(UINT32);
  249                 for (i = 0; i < count; i++)
  250                         if (probe_table(rsdt->TableOffsetEntry[i], sig)) {
  251                                 addr = rsdt->TableOffsetEntry[i];
  252                                 break;
  253                         }
  254                 acpi_unmap_table(rsdt);
  255         }
  256         pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP));
  257         if (addr == 0)
  258                 return (0);
  259 
  260         /*
  261          * Verify that we can map the full table and that its checksum is
  262          * correct, etc.
  263          */
  264         table = map_table(addr, sig);
  265         if (table == NULL)
  266                 return (0);
  267         acpi_unmap_table(table);
  268 
  269         return (addr);
  270 }
  271 
  272 /*
  273  * ACPI nexus(4) driver.
  274  */
  275 static int
  276 nexus_acpi_probe(device_t dev)
  277 {
  278         int error;
  279 
  280         error = acpi_identify();
  281         if (error)
  282                 return (error);
  283 
  284         return (BUS_PROBE_DEFAULT);
  285 }
  286 
  287 static int
  288 nexus_acpi_attach(device_t dev)
  289 {
  290 
  291         nexus_init_resources();
  292         bus_generic_probe(dev);
  293         if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL)
  294                 panic("failed to add acpi0 device");
  295 
  296         return (bus_generic_attach(dev));
  297 }
  298 
  299 static device_method_t nexus_acpi_methods[] = {
  300         /* Device interface */
  301         DEVMETHOD(device_probe,         nexus_acpi_probe),
  302         DEVMETHOD(device_attach,        nexus_acpi_attach),
  303 
  304         { 0, 0 }
  305 };
  306 
  307 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver);
  308 static devclass_t nexus_devclass;
  309 
  310 DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0);
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FreeBSD/Linux Kernel Cross Reference sys/i386/acpica/acpi_machdep.c

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sys/i386/acpica/acpi_machdep.c
