usr/src/boot/sys/boot/efi/loader/acpi.c

   1 /*
   2  * This file and its contents are supplied under the terms of the
   3  * Common Development and Distribution License ("CDDL"), version 1.0.
   4  * You may only use this file in accordance with the terms of version
   5  * 1.0 of the CDDL.
   6  *
   7  * A full copy of the text of the CDDL should have accompanied this
   8  * source.  A copy of the CDDL is also available via the Internet at
   9  * http://www.illumos.org/license/CDDL.
  10  */
  11
  12 /*
  13  * Copyright 2016 Tooams Soome <tsoome@me.com>
  14  */
  15
  16 #include <sys/cdefs.h>
  17
  18 #include <stand.h>
  19 #include <machine/stdarg.h>
  20 #include <bootstrap.h>
  21 #include <efi.h>
  22 #include <efilib.h>
  23
  24 #include "platform/acfreebsd.h"
  25 #include "acconfig.h"
  26 #define ACPI_SYSTEM_XFACE
  27 #include "actypes.h"
  28 #include "actbl.h"
  29
  30 ACPI_TABLE_RSDP *rsdp;
  31 static EFI_GUID acpi_guid = ACPI_TABLE_GUID;
  32 static EFI_GUID acpi20_guid = ACPI_20_TABLE_GUID;
  33
  34 void
  35 acpi_detect(void)
  36 {
  37     char                buf[24];
  38     int                 revision;
  39
  40     if ((rsdp = efi_get_table(&acpi20_guid)) == NULL)
  41         rsdp = efi_get_table(&acpi_guid);
  42
  43     if (rsdp == NULL)
  44         return;
  45
  46     /* export values from the RSDP */
  47 #ifdef _LP64
  48     snprintf(buf, sizeof (buf), "0x%016llx", (unsigned long long)rsdp);
  49 #else
  50     snprintf(buf, sizeof (buf), "0x%08x", (unsigned int)rsdp);
  51 #endif
  52     setenv("acpi.rsdp", buf, 1);
  53     revision = rsdp->Revision;
  54     if (revision == 0)
  55         revision = 1;
  56     snprintf(buf, sizeof (buf), "%d", revision);
  57     setenv("acpi.revision", buf, 1);
  58     strncpy(buf, rsdp->OemId, sizeof(rsdp->OemId));
  59     buf[sizeof(rsdp->OemId)] = '\0';
  60     setenv("acpi.oem", buf, 1);
  61 #ifdef _LP64
  62     snprintf(buf, sizeof (buf), "0x%016llx",
  63         (unsigned long long)rsdp->RsdtPhysicalAddress);
  64 #else
  65     snprintf(buf, sizeof (buf), "0x%08x", rsdp->RsdtPhysicalAddress);
  66 #endif
  67     setenv("acpi.rsdt", buf, 1);
  68     if (revision >= 2) {
  69         snprintf(buf, sizeof (buf), "0x%016llx",
  70             (unsigned long long)rsdp->XsdtPhysicalAddress);
  71         setenv("acpi.xsdt", buf, 1);
  72         snprintf(buf, sizeof (buf), "%d", rsdp->Length);
  73         setenv("acpi.xsdt_length", buf, 1);
  74     }
  75 }