acpi_machdep.c

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    1 /*-
    2  * Copyright (c) 2001 Mitsuru IWASAKI
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/9.0/sys/i386/acpica/acpi_machdep.c 215097 2010-11-10 18:50:12Z jkim $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/bus.h>
   32 #include <sys/kernel.h>
   33 #include <sys/module.h>
   34 #include <sys/sysctl.h>
   35 
   36 #include <vm/vm.h>
   37 #include <vm/pmap.h>
   38 
   39 #include <contrib/dev/acpica/include/acpi.h>
   40 #include <contrib/dev/acpica/include/accommon.h>
   41 #include <contrib/dev/acpica/include/actables.h>
   42 
   43 #include <dev/acpica/acpivar.h>
   44 
   45 #include <machine/nexusvar.h>
   46 
   47 SYSCTL_DECL(_debug_acpi);
   48 
   49 uint32_t acpi_resume_beep;
   50 TUNABLE_INT("debug.acpi.resume_beep", &acpi_resume_beep);
   51 SYSCTL_UINT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RW, &acpi_resume_beep,
   52     0, "Beep the PC speaker when resuming");
   53 
   54 uint32_t acpi_reset_video;
   55 TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video);
   56 
   57 static int intr_model = ACPI_INTR_PIC;
   58 
   59 int
   60 acpi_machdep_init(device_t dev)
   61 {
   62         struct acpi_softc *sc;
   63 
   64         sc = device_get_softc(dev);
   65 
   66         acpi_apm_init(sc);
   67         acpi_install_wakeup_handler(sc);
   68 
   69         if (intr_model == ACPI_INTR_PIC)
   70                 BUS_CONFIG_INTR(dev, AcpiGbl_FADT.SciInterrupt,
   71                     INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW);
   72         else
   73                 acpi_SetIntrModel(intr_model);
   74 
   75         SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx,
   76             SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
   77             "reset_video", CTLFLAG_RW, &acpi_reset_video, 0,
   78             "Call the VESA reset BIOS vector on the resume path");
   79 
   80         return (0);
   81 }
   82 
   83 void
   84 acpi_SetDefaultIntrModel(int model)
   85 {
   86 
   87         intr_model = model;
   88 }
   89 
   90 /* Check BIOS date.  If 1998 or older, disable ACPI. */
   91 int
   92 acpi_machdep_quirks(int *quirks)
   93 {
   94         char *va;
   95         int year;
   96 
   97         /* BIOS address 0xffff5 contains the date in the format mm/dd/yy. */
   98         va = pmap_mapbios(0xffff0, 16);
   99         sscanf(va + 11, "%2d", &year);
  100         pmap_unmapbios((vm_offset_t)va, 16);
  101 
  102         /* 
  103          * Date must be >= 1/1/1999 or we don't trust ACPI.  Note that this
  104          * check must be changed by my 114th birthday.
  105          */
  106         if (year > 90 && year < 99)
  107                 *quirks = ACPI_Q_BROKEN;
  108 
  109         return (0);
  110 }
  111 
  112 void
  113 acpi_cpu_c1()
  114 {
  115 
  116         __asm __volatile("sti; hlt");
  117 }
  118 
  119 /*
  120  * Support for mapping ACPI tables during early boot.  This abuses the
  121  * crashdump map because the kernel cannot allocate KVA in
  122  * pmap_mapbios() when this is used.  This makes the following
  123  * assumptions about how we use this KVA: pages 0 and 1 are used to
  124  * map in the header of each table found via the RSDT or XSDT and
  125  * pages 2 to n are used to map in the RSDT or XSDT.  This has to use
  126  * 2 pages for the table headers in case a header spans a page
  127  * boundary.
  128  *
  129  * XXX: We don't ensure the table fits in the available address space
  130  * in the crashdump map.
  131  */
  132 
  133 /*
  134  * Map some memory using the crashdump map.  'offset' is an offset in
  135  * pages into the crashdump map to use for the start of the mapping.
  136  */
  137 static void *
  138 table_map(vm_paddr_t pa, int offset, vm_offset_t length)
  139 {
  140         vm_offset_t va, off;
  141         void *data;
  142 
  143         off = pa & PAGE_MASK;
  144         length = roundup(length + off, PAGE_SIZE);
  145         pa = pa & PG_FRAME;
  146         va = (vm_offset_t)pmap_kenter_temporary(pa, offset) +
  147             (offset * PAGE_SIZE);
  148         data = (void *)(va + off);
  149         length -= PAGE_SIZE;
  150         while (length > 0) {
  151                 va += PAGE_SIZE;
  152                 pa += PAGE_SIZE;
  153                 length -= PAGE_SIZE;
  154                 pmap_kenter(va, pa);
  155                 invlpg(va);
  156         }
  157         return (data);
  158 }
  159 
  160 /* Unmap memory previously mapped with table_map(). */
  161 static void
  162 table_unmap(void *data, vm_offset_t length)
  163 {
  164         vm_offset_t va, off;
  165 
  166         va = (vm_offset_t)data;
  167         off = va & PAGE_MASK;
  168         length = roundup(length + off, PAGE_SIZE);
  169         va &= ~PAGE_MASK;
  170         while (length > 0) {
  171                 pmap_kremove(va);
  172                 invlpg(va);
  173                 va += PAGE_SIZE;
  174                 length -= PAGE_SIZE;
  175         }
  176 }
  177 
  178 /*
  179  * Map a table at a given offset into the crashdump map.  It first
  180  * maps the header to determine the table length and then maps the
  181  * entire table.
  182  */
  183 static void *
  184 map_table(vm_paddr_t pa, int offset, const char *sig)
  185 {
  186         ACPI_TABLE_HEADER *header;
  187         vm_offset_t length;
  188         void *table;
  189 
  190         header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER));
  191         if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) {
  192                 table_unmap(header, sizeof(ACPI_TABLE_HEADER));
  193                 return (NULL);
  194         }
  195         length = header->Length;
  196         table_unmap(header, sizeof(ACPI_TABLE_HEADER));
  197         table = table_map(pa, offset, length);
  198         if (ACPI_FAILURE(AcpiTbChecksum(table, length))) {
  199                 if (bootverbose)
  200                         printf("ACPI: Failed checksum for table %s\n", sig);
  201 #if (ACPI_CHECKSUM_ABORT)
  202                 table_unmap(table, length);
  203                 return (NULL);
  204 #endif
  205         }
  206         return (table);
  207 }
  208 
  209 /*
  210  * See if a given ACPI table is the requested table.  Returns the
  211  * length of the able if it matches or zero on failure.
  212  */
  213 static int
  214 probe_table(vm_paddr_t address, const char *sig)
  215 {
  216         ACPI_TABLE_HEADER *table;
  217 
  218         table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER));
  219         if (table == NULL) {
  220                 if (bootverbose)
  221                         printf("ACPI: Failed to map table at 0x%jx\n",
  222                             (uintmax_t)address);
  223                 return (0);
  224         }
  225         if (bootverbose)
  226                 printf("Table '%.4s' at 0x%jx\n", table->Signature,
  227                     (uintmax_t)address);
  228 
  229         if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0) {
  230                 table_unmap(table, sizeof(ACPI_TABLE_HEADER));
  231                 return (0);
  232         }
  233         table_unmap(table, sizeof(ACPI_TABLE_HEADER));
  234         return (1);
  235 }
  236 
  237 /*
  238  * Try to map a table at a given physical address previously returned
  239  * by acpi_find_table().
  240  */
  241 void *
  242 acpi_map_table(vm_paddr_t pa, const char *sig)
  243 {
  244 
  245         return (map_table(pa, 0, sig));
  246 }
  247 
  248 /* Unmap a table previously mapped via acpi_map_table(). */
  249 void
  250 acpi_unmap_table(void *table)
  251 {
  252         ACPI_TABLE_HEADER *header;
  253 
  254         header = (ACPI_TABLE_HEADER *)table;
  255         table_unmap(table, header->Length);
  256 }
  257 
  258 /*
  259  * Return the physical address of the requested table or zero if one
  260  * is not found.
  261  */
  262 vm_paddr_t
  263 acpi_find_table(const char *sig)
  264 {
  265         ACPI_PHYSICAL_ADDRESS rsdp_ptr;
  266         ACPI_TABLE_RSDP *rsdp;
  267         ACPI_TABLE_RSDT *rsdt;
  268         ACPI_TABLE_XSDT *xsdt;
  269         ACPI_TABLE_HEADER *table;
  270         vm_paddr_t addr;
  271         int i, count;
  272 
  273         if (resource_disabled("acpi", 0))
  274                 return (0);
  275 
  276         /*
  277          * Map in the RSDP.  Since ACPI uses AcpiOsMapMemory() which in turn
  278          * calls pmap_mapbios() to find the RSDP, we assume that we can use
  279          * pmap_mapbios() to map the RSDP.
  280          */
  281         if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
  282                 return (0);
  283         rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP));
  284         if (rsdp == NULL) {
  285                 if (bootverbose)
  286                         printf("ACPI: Failed to map RSDP\n");
  287                 return (0);
  288         }
  289 
  290         /*
  291          * For ACPI >= 2.0, use the XSDT if it is available.
  292          * Otherwise, use the RSDT.  We map the XSDT or RSDT at page 2
  293          * in the crashdump area.  Pages 0 and 1 are used to map in the
  294          * headers of candidate ACPI tables.
  295          */
  296         addr = 0;
  297         if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) {
  298                 /*
  299                  * AcpiOsGetRootPointer only verifies the checksum for
  300                  * the version 1.0 portion of the RSDP.  Version 2.0 has
  301                  * an additional checksum that we verify first.
  302                  */
  303                 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) {
  304                         if (bootverbose)
  305                                 printf("ACPI: RSDP failed extended checksum\n");
  306                         return (0);
  307                 }
  308                 xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT);
  309                 if (xsdt == NULL) {
  310                         if (bootverbose)
  311                                 printf("ACPI: Failed to map XSDT\n");
  312                         return (0);
  313                 }
  314                 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
  315                     sizeof(UINT64);
  316                 for (i = 0; i < count; i++)
  317                         if (probe_table(xsdt->TableOffsetEntry[i], sig)) {
  318                                 addr = xsdt->TableOffsetEntry[i];
  319                                 break;
  320                         }
  321                 acpi_unmap_table(xsdt);
  322         } else {
  323                 rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT);
  324                 if (rsdt == NULL) {
  325                         if (bootverbose)
  326                                 printf("ACPI: Failed to map RSDT\n");
  327                         return (0);
  328                 }
  329                 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
  330                     sizeof(UINT32);
  331                 for (i = 0; i < count; i++)
  332                         if (probe_table(rsdt->TableOffsetEntry[i], sig)) {
  333                                 addr = rsdt->TableOffsetEntry[i];
  334                                 break;
  335                         }
  336                 acpi_unmap_table(rsdt);
  337         }
  338         pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP));
  339         if (addr == 0) {
  340                 if (bootverbose)
  341                         printf("ACPI: No %s table found\n", sig);
  342                 return (0);
  343         }
  344         if (bootverbose)
  345                 printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr);
  346 
  347         /*
  348          * Verify that we can map the full table and that its checksum is
  349          * correct, etc.
  350          */
  351         table = map_table(addr, 0, sig);
  352         if (table == NULL)
  353                 return (0);
  354         acpi_unmap_table(table);
  355 
  356         return (addr);
  357 }
  358 
  359 /*
  360  * ACPI nexus(4) driver.
  361  */
  362 static int
  363 nexus_acpi_probe(device_t dev)
  364 {
  365         int error;
  366 
  367         error = acpi_identify();
  368         if (error)
  369                 return (error);
  370 
  371         return (BUS_PROBE_DEFAULT);
  372 }
  373 
  374 static int
  375 nexus_acpi_attach(device_t dev)
  376 {
  377 
  378         nexus_init_resources();
  379         bus_generic_probe(dev);
  380         if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL)
  381                 panic("failed to add acpi0 device");
  382 
  383         return (bus_generic_attach(dev));
  384 }
  385 
  386 static device_method_t nexus_acpi_methods[] = {
  387         /* Device interface */
  388         DEVMETHOD(device_probe,         nexus_acpi_probe),
  389         DEVMETHOD(device_attach,        nexus_acpi_attach),
  390 
  391         { 0, 0 }
  392 };
  393 
  394 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver);
  395 static devclass_t nexus_devclass;
  396 
  397 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

FreeBSD/Linux Kernel Cross Reference
sys/i386/acpica/acpi_machdep.c
