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("$FreeBSD$");
   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 int acpi_resume_beep;
   48 TUNABLE_INT("debug.acpi.resume_beep", &acpi_resume_beep);
   49 SYSCTL_INT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RW, &acpi_resume_beep,
   50     0, "Beep the PC speaker when resuming");
   51 
   52 int acpi_reset_video;
   53 TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video);
   54 
   55 static int intr_model = ACPI_INTR_PIC;
   56 
   57 int
   58 acpi_machdep_init(device_t dev)
   59 {
   60         struct acpi_softc *sc;
   61 
   62         sc = device_get_softc(dev);
   63 
   64         acpi_apm_init(sc);
   65 
   66         if (intr_model != ACPI_INTR_PIC)
   67                 acpi_SetIntrModel(intr_model);
   68 
   69         SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx,
   70             SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
   71             "reset_video", CTLFLAG_RW, &acpi_reset_video, 0,
   72             "Call the VESA reset BIOS vector on the resume path");
   73 
   74         return (0);
   75 }
   76 
   77 void
   78 acpi_SetDefaultIntrModel(int model)
   79 {
   80 
   81         intr_model = model;
   82 }
   83 
   84 int
   85 acpi_machdep_quirks(int *quirks)
   86 {
   87 
   88         return (0);
   89 }
   90 
   91 void
   92 acpi_cpu_c1()
   93 {
   94 
   95         __asm __volatile("sti; hlt");
   96 }
   97 
   98 /*
   99  * Support for mapping ACPI tables during early boot.  Currently this
  100  * uses the crashdump map to map each table.  However, the crashdump
  101  * map is created in pmap_bootstrap() right after the direct map, so
  102  * we should be able to just use pmap_mapbios() here instead.
  103  *
  104  * This makes the following assumptions about how we use this KVA:
  105  * pages 0 and 1 are used to map in the header of each table found via
  106  * the RSDT or XSDT and pages 2 to n are used to map in the RSDT or
  107  * XSDT.  This has to use 2 pages for the table headers in case a
  108  * header spans a page boundary.
  109  *
  110  * XXX: We don't ensure the table fits in the available address space
  111  * in the crashdump map.
  112  */
  113 
  114 /*
  115  * Map some memory using the crashdump map.  'offset' is an offset in
  116  * pages into the crashdump map to use for the start of the mapping.
  117  */
  118 static void *
  119 table_map(vm_paddr_t pa, int offset, vm_offset_t length)
  120 {
  121         vm_offset_t va, off;
  122         void *data;
  123 
  124         off = pa & PAGE_MASK;
  125         length = roundup(length + off, PAGE_SIZE);
  126         pa = pa & PG_FRAME;
  127         va = (vm_offset_t)pmap_kenter_temporary(pa, offset) +
  128             (offset * PAGE_SIZE);
  129         data = (void *)(va + off);
  130         length -= PAGE_SIZE;
  131         while (length > 0) {
  132                 va += PAGE_SIZE;
  133                 pa += PAGE_SIZE;
  134                 length -= PAGE_SIZE;
  135                 pmap_kenter(va, pa);
  136                 invlpg(va);
  137         }
  138         return (data);
  139 }
  140 
  141 /* Unmap memory previously mapped with table_map(). */
  142 static void
  143 table_unmap(void *data, vm_offset_t length)
  144 {
  145         vm_offset_t va, off;
  146 
  147         va = (vm_offset_t)data;
  148         off = va & PAGE_MASK;
  149         length = roundup(length + off, PAGE_SIZE);
  150         va &= ~PAGE_MASK;
  151         while (length > 0) {
  152                 pmap_kremove(va);
  153                 invlpg(va);
  154                 va += PAGE_SIZE;
  155                 length -= PAGE_SIZE;
  156         }
  157 }
  158 
  159 /*
  160  * Map a table at a given offset into the crashdump map.  It first
  161  * maps the header to determine the table length and then maps the
  162  * entire table.
  163  */
  164 static void *
  165 map_table(vm_paddr_t pa, int offset, const char *sig)
  166 {
  167         ACPI_TABLE_HEADER *header;
  168         vm_offset_t length;
  169         void *table;
  170 
  171         header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER));
  172         if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) {
  173                 table_unmap(header, sizeof(ACPI_TABLE_HEADER));
  174                 return (NULL);
  175         }
  176         length = header->Length;
  177         table_unmap(header, sizeof(ACPI_TABLE_HEADER));
  178         table = table_map(pa, offset, length);
  179         if (ACPI_FAILURE(AcpiTbChecksum(table, length))) {
  180                 if (bootverbose)
  181                         printf("ACPI: Failed checksum for table %s\n", sig);
  182 #if (ACPI_CHECKSUM_ABORT)
  183                 table_unmap(table, length);
  184                 return (NULL);
  185 #endif
  186         }
  187         return (table);
  188 }
  189 
  190 /*
  191  * See if a given ACPI table is the requested table.  Returns the
  192  * length of the able if it matches or zero on failure.
  193  */
  194 static int
  195 probe_table(vm_paddr_t address, const char *sig)
  196 {
  197         ACPI_TABLE_HEADER *table;
  198 
  199         table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER));
  200         if (table == NULL) {
  201                 if (bootverbose)
  202                         printf("ACPI: Failed to map table at 0x%jx\n",
  203                             (uintmax_t)address);
  204                 return (0);
  205         }
  206         if (bootverbose)
  207                 printf("Table '%.4s' at 0x%jx\n", table->Signature,
  208                     (uintmax_t)address);
  209 
  210         if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0) {
  211                 table_unmap(table, sizeof(ACPI_TABLE_HEADER));
  212                 return (0);
  213         }
  214         table_unmap(table, sizeof(ACPI_TABLE_HEADER));
  215         return (1);
  216 }
  217 
  218 /*
  219  * Try to map a table at a given physical address previously returned
  220  * by acpi_find_table().
  221  */
  222 void *
  223 acpi_map_table(vm_paddr_t pa, const char *sig)
  224 {
  225 
  226         return (map_table(pa, 0, sig));
  227 }
  228 
  229 /* Unmap a table previously mapped via acpi_map_table(). */
  230 void
  231 acpi_unmap_table(void *table)
  232 {
  233         ACPI_TABLE_HEADER *header;
  234 
  235         header = (ACPI_TABLE_HEADER *)table;
  236         table_unmap(table, header->Length);
  237 }
  238 
  239 /*
  240  * Return the physical address of the requested table or zero if one
  241  * is not found.
  242  */
  243 vm_paddr_t
  244 acpi_find_table(const char *sig)
  245 {
  246         ACPI_PHYSICAL_ADDRESS rsdp_ptr;
  247         ACPI_TABLE_RSDP *rsdp;
  248         ACPI_TABLE_RSDT *rsdt;
  249         ACPI_TABLE_XSDT *xsdt;
  250         ACPI_TABLE_HEADER *table;
  251         vm_paddr_t addr;
  252         int i, count;
  253 
  254         if (resource_disabled("acpi", 0))
  255                 return (0);
  256 
  257         /*
  258          * Map in the RSDP.  Since ACPI uses AcpiOsMapMemory() which in turn
  259          * calls pmap_mapbios() to find the RSDP, we assume that we can use
  260          * pmap_mapbios() to map the RSDP.
  261          */
  262         if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
  263                 return (0);
  264         rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP));
  265         if (rsdp == NULL) {
  266                 if (bootverbose)
  267                         printf("ACPI: Failed to map RSDP\n");
  268                 return (0);
  269         }
  270 
  271         /*
  272          * For ACPI >= 2.0, use the XSDT if it is available.
  273          * Otherwise, use the RSDT.  We map the XSDT or RSDT at page 2
  274          * in the crashdump area.  Pages 0 and 1 are used to map in the
  275          * headers of candidate ACPI tables.
  276          */
  277         addr = 0;
  278         if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) {
  279                 /*
  280                  * AcpiOsGetRootPointer only verifies the checksum for
  281                  * the version 1.0 portion of the RSDP.  Version 2.0 has
  282                  * an additional checksum that we verify first.
  283                  */
  284                 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) {
  285                         if (bootverbose)
  286                                 printf("ACPI: RSDP failed extended checksum\n");
  287                         return (0);
  288                 }
  289                 xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT);
  290                 if (xsdt == NULL) {
  291                         if (bootverbose)
  292                                 printf("ACPI: Failed to map XSDT\n");
  293                         return (0);
  294                 }
  295                 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
  296                     sizeof(UINT64);
  297                 for (i = 0; i < count; i++)
  298                         if (probe_table(xsdt->TableOffsetEntry[i], sig)) {
  299                                 addr = xsdt->TableOffsetEntry[i];
  300                                 break;
  301                         }
  302                 acpi_unmap_table(xsdt);
  303         } else {
  304                 rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT);
  305                 if (rsdt == NULL) {
  306                         if (bootverbose)
  307                                 printf("ACPI: Failed to map RSDT\n");
  308                         return (0);
  309                 }
  310                 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
  311                     sizeof(UINT32);
  312                 for (i = 0; i < count; i++)
  313                         if (probe_table(rsdt->TableOffsetEntry[i], sig)) {
  314                                 addr = rsdt->TableOffsetEntry[i];
  315                                 break;
  316                         }
  317                 acpi_unmap_table(rsdt);
  318         }
  319         pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP));
  320         if (addr == 0) {
  321                 if (bootverbose)
  322                         printf("ACPI: No %s table found\n", sig);
  323                 return (0);
  324         }
  325         if (bootverbose)
  326                 printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr);
  327 
  328         /*
  329          * Verify that we can map the full table and that its checksum is
  330          * correct, etc.
  331          */
  332         table = map_table(addr, 0, sig);
  333         if (table == NULL)
  334                 return (0);
  335         acpi_unmap_table(table);
  336 
  337         return (addr);
  338 }
  339 
  340 /*
  341  * ACPI nexus(4) driver.
  342  */
  343 static int
  344 nexus_acpi_probe(device_t dev)
  345 {
  346         int error;
  347 
  348         error = acpi_identify();
  349         if (error)
  350                 return (error);
  351 
  352         return (BUS_PROBE_DEFAULT);
  353 }
  354 
  355 static int
  356 nexus_acpi_attach(device_t dev)
  357 {
  358         device_t acpi_dev;
  359         int error;
  360 
  361         nexus_init_resources();
  362         bus_generic_probe(dev);
  363         acpi_dev = BUS_ADD_CHILD(dev, 10, "acpi", 0);
  364         if (acpi_dev == NULL)
  365                 panic("failed to add acpi0 device");
  366 
  367         error = bus_generic_attach(dev);
  368         if (error == 0)
  369                 acpi_install_wakeup_handler(device_get_softc(acpi_dev));
  370 
  371         return (error);
  372 }
  373 
  374 static device_method_t nexus_acpi_methods[] = {
  375         /* Device interface */
  376         DEVMETHOD(device_probe,         nexus_acpi_probe),
  377         DEVMETHOD(device_attach,        nexus_acpi_attach),
  378 
  379         { 0, 0 }
  380 };
  381 
  382 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver);
  383 static devclass_t nexus_devclass;
  384 
  385 DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0);
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FreeBSD/Linux Kernel Cross Reference sys/amd64/acpica/acpi_machdep.c

FreeBSD/Linux Kernel Cross Reference
sys/amd64/acpica/acpi_machdep.c
