Home | History | Annotate | Line # | Download | only in tables
tbfadt.c revision 1.1.1.13
      1       1.1    jruoho /******************************************************************************
      2       1.1    jruoho  *
      3       1.1    jruoho  * Module Name: tbfadt   - FADT table utilities
      4       1.1    jruoho  *
      5       1.1    jruoho  *****************************************************************************/
      6       1.1    jruoho 
      7   1.1.1.2    jruoho /*
      8  1.1.1.13  christos  * Copyright (C) 2000 - 2019, Intel Corp.
      9       1.1    jruoho  * All rights reserved.
     10       1.1    jruoho  *
     11   1.1.1.2    jruoho  * Redistribution and use in source and binary forms, with or without
     12   1.1.1.2    jruoho  * modification, are permitted provided that the following conditions
     13   1.1.1.2    jruoho  * are met:
     14   1.1.1.2    jruoho  * 1. Redistributions of source code must retain the above copyright
     15   1.1.1.2    jruoho  *    notice, this list of conditions, and the following disclaimer,
     16   1.1.1.2    jruoho  *    without modification.
     17   1.1.1.2    jruoho  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
     18   1.1.1.2    jruoho  *    substantially similar to the "NO WARRANTY" disclaimer below
     19   1.1.1.2    jruoho  *    ("Disclaimer") and any redistribution must be conditioned upon
     20   1.1.1.2    jruoho  *    including a substantially similar Disclaimer requirement for further
     21   1.1.1.2    jruoho  *    binary redistribution.
     22   1.1.1.2    jruoho  * 3. Neither the names of the above-listed copyright holders nor the names
     23   1.1.1.2    jruoho  *    of any contributors may be used to endorse or promote products derived
     24   1.1.1.2    jruoho  *    from this software without specific prior written permission.
     25   1.1.1.2    jruoho  *
     26   1.1.1.2    jruoho  * Alternatively, this software may be distributed under the terms of the
     27   1.1.1.2    jruoho  * GNU General Public License ("GPL") version 2 as published by the Free
     28   1.1.1.2    jruoho  * Software Foundation.
     29   1.1.1.2    jruoho  *
     30   1.1.1.2    jruoho  * NO WARRANTY
     31   1.1.1.2    jruoho  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     32   1.1.1.2    jruoho  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     33   1.1.1.2    jruoho  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
     34   1.1.1.2    jruoho  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     35   1.1.1.2    jruoho  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     36   1.1.1.2    jruoho  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     37   1.1.1.2    jruoho  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     38   1.1.1.2    jruoho  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     39   1.1.1.2    jruoho  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
     40   1.1.1.2    jruoho  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     41   1.1.1.2    jruoho  * POSSIBILITY OF SUCH DAMAGES.
     42   1.1.1.2    jruoho  */
     43       1.1    jruoho 
     44       1.1    jruoho #include "acpi.h"
     45       1.1    jruoho #include "accommon.h"
     46       1.1    jruoho #include "actables.h"
     47       1.1    jruoho 
     48       1.1    jruoho #define _COMPONENT          ACPI_TABLES
     49       1.1    jruoho         ACPI_MODULE_NAME    ("tbfadt")
     50       1.1    jruoho 
     51       1.1    jruoho /* Local prototypes */
     52       1.1    jruoho 
     53   1.1.1.3  christos static void
     54       1.1    jruoho AcpiTbInitGenericAddress (
     55       1.1    jruoho     ACPI_GENERIC_ADDRESS    *GenericAddress,
     56       1.1    jruoho     UINT8                   SpaceId,
     57       1.1    jruoho     UINT8                   ByteWidth,
     58   1.1.1.3  christos     UINT64                  Address,
     59   1.1.1.8  christos     const char              *RegisterName,
     60   1.1.1.4  christos     UINT8                   Flags);
     61       1.1    jruoho 
     62       1.1    jruoho static void
     63       1.1    jruoho AcpiTbConvertFadt (
     64       1.1    jruoho     void);
     65       1.1    jruoho 
     66       1.1    jruoho static void
     67       1.1    jruoho AcpiTbSetupFadtRegisters (
     68       1.1    jruoho     void);
     69       1.1    jruoho 
     70   1.1.1.3  christos static UINT64
     71   1.1.1.3  christos AcpiTbSelectAddress (
     72   1.1.1.3  christos     char                    *RegisterName,
     73   1.1.1.3  christos     UINT32                  Address32,
     74   1.1.1.3  christos     UINT64                  Address64);
     75   1.1.1.3  christos 
     76       1.1    jruoho 
     77       1.1    jruoho /* Table for conversion of FADT to common internal format and FADT validation */
     78       1.1    jruoho 
     79       1.1    jruoho typedef struct acpi_fadt_info
     80       1.1    jruoho {
     81   1.1.1.8  christos     const char              *Name;
     82   1.1.1.3  christos     UINT16                  Address64;
     83   1.1.1.3  christos     UINT16                  Address32;
     84   1.1.1.3  christos     UINT16                  Length;
     85       1.1    jruoho     UINT8                   DefaultLength;
     86   1.1.1.4  christos     UINT8                   Flags;
     87       1.1    jruoho 
     88       1.1    jruoho } ACPI_FADT_INFO;
     89       1.1    jruoho 
     90   1.1.1.3  christos #define ACPI_FADT_OPTIONAL          0
     91       1.1    jruoho #define ACPI_FADT_REQUIRED          1
     92       1.1    jruoho #define ACPI_FADT_SEPARATE_LENGTH   2
     93   1.1.1.4  christos #define ACPI_FADT_GPE_REGISTER      4
     94       1.1    jruoho 
     95       1.1    jruoho static ACPI_FADT_INFO     FadtInfoTable[] =
     96       1.1    jruoho {
     97       1.1    jruoho     {"Pm1aEventBlock",
     98       1.1    jruoho         ACPI_FADT_OFFSET (XPm1aEventBlock),
     99       1.1    jruoho         ACPI_FADT_OFFSET (Pm1aEventBlock),
    100       1.1    jruoho         ACPI_FADT_OFFSET (Pm1EventLength),
    101       1.1    jruoho         ACPI_PM1_REGISTER_WIDTH * 2,        /* Enable + Status register */
    102       1.1    jruoho         ACPI_FADT_REQUIRED},
    103       1.1    jruoho 
    104       1.1    jruoho     {"Pm1bEventBlock",
    105       1.1    jruoho         ACPI_FADT_OFFSET (XPm1bEventBlock),
    106       1.1    jruoho         ACPI_FADT_OFFSET (Pm1bEventBlock),
    107       1.1    jruoho         ACPI_FADT_OFFSET (Pm1EventLength),
    108       1.1    jruoho         ACPI_PM1_REGISTER_WIDTH * 2,        /* Enable + Status register */
    109   1.1.1.3  christos         ACPI_FADT_OPTIONAL},
    110       1.1    jruoho 
    111       1.1    jruoho     {"Pm1aControlBlock",
    112       1.1    jruoho         ACPI_FADT_OFFSET (XPm1aControlBlock),
    113       1.1    jruoho         ACPI_FADT_OFFSET (Pm1aControlBlock),
    114       1.1    jruoho         ACPI_FADT_OFFSET (Pm1ControlLength),
    115       1.1    jruoho         ACPI_PM1_REGISTER_WIDTH,
    116       1.1    jruoho         ACPI_FADT_REQUIRED},
    117       1.1    jruoho 
    118       1.1    jruoho     {"Pm1bControlBlock",
    119       1.1    jruoho         ACPI_FADT_OFFSET (XPm1bControlBlock),
    120       1.1    jruoho         ACPI_FADT_OFFSET (Pm1bControlBlock),
    121       1.1    jruoho         ACPI_FADT_OFFSET (Pm1ControlLength),
    122       1.1    jruoho         ACPI_PM1_REGISTER_WIDTH,
    123   1.1.1.3  christos         ACPI_FADT_OPTIONAL},
    124       1.1    jruoho 
    125       1.1    jruoho     {"Pm2ControlBlock",
    126       1.1    jruoho         ACPI_FADT_OFFSET (XPm2ControlBlock),
    127       1.1    jruoho         ACPI_FADT_OFFSET (Pm2ControlBlock),
    128       1.1    jruoho         ACPI_FADT_OFFSET (Pm2ControlLength),
    129       1.1    jruoho         ACPI_PM2_REGISTER_WIDTH,
    130       1.1    jruoho         ACPI_FADT_SEPARATE_LENGTH},
    131       1.1    jruoho 
    132       1.1    jruoho     {"PmTimerBlock",
    133       1.1    jruoho         ACPI_FADT_OFFSET (XPmTimerBlock),
    134       1.1    jruoho         ACPI_FADT_OFFSET (PmTimerBlock),
    135       1.1    jruoho         ACPI_FADT_OFFSET (PmTimerLength),
    136       1.1    jruoho         ACPI_PM_TIMER_WIDTH,
    137   1.1.1.3  christos         ACPI_FADT_SEPARATE_LENGTH},         /* ACPI 5.0A: Timer is optional */
    138       1.1    jruoho 
    139       1.1    jruoho     {"Gpe0Block",
    140       1.1    jruoho         ACPI_FADT_OFFSET (XGpe0Block),
    141       1.1    jruoho         ACPI_FADT_OFFSET (Gpe0Block),
    142       1.1    jruoho         ACPI_FADT_OFFSET (Gpe0BlockLength),
    143       1.1    jruoho         0,
    144   1.1.1.4  christos         ACPI_FADT_SEPARATE_LENGTH | ACPI_FADT_GPE_REGISTER},
    145       1.1    jruoho 
    146       1.1    jruoho     {"Gpe1Block",
    147       1.1    jruoho         ACPI_FADT_OFFSET (XGpe1Block),
    148       1.1    jruoho         ACPI_FADT_OFFSET (Gpe1Block),
    149       1.1    jruoho         ACPI_FADT_OFFSET (Gpe1BlockLength),
    150       1.1    jruoho         0,
    151   1.1.1.4  christos         ACPI_FADT_SEPARATE_LENGTH | ACPI_FADT_GPE_REGISTER}
    152       1.1    jruoho };
    153       1.1    jruoho 
    154       1.1    jruoho #define ACPI_FADT_INFO_ENTRIES \
    155       1.1    jruoho             (sizeof (FadtInfoTable) / sizeof (ACPI_FADT_INFO))
    156       1.1    jruoho 
    157       1.1    jruoho 
    158       1.1    jruoho /* Table used to split Event Blocks into separate status/enable registers */
    159       1.1    jruoho 
    160       1.1    jruoho typedef struct acpi_fadt_pm_info
    161       1.1    jruoho {
    162       1.1    jruoho     ACPI_GENERIC_ADDRESS    *Target;
    163   1.1.1.3  christos     UINT16                  Source;
    164       1.1    jruoho     UINT8                   RegisterNum;
    165       1.1    jruoho 
    166       1.1    jruoho } ACPI_FADT_PM_INFO;
    167       1.1    jruoho 
    168       1.1    jruoho static ACPI_FADT_PM_INFO    FadtPmInfoTable[] =
    169       1.1    jruoho {
    170       1.1    jruoho     {&AcpiGbl_XPm1aStatus,
    171       1.1    jruoho         ACPI_FADT_OFFSET (XPm1aEventBlock),
    172       1.1    jruoho         0},
    173       1.1    jruoho 
    174       1.1    jruoho     {&AcpiGbl_XPm1aEnable,
    175       1.1    jruoho         ACPI_FADT_OFFSET (XPm1aEventBlock),
    176       1.1    jruoho         1},
    177       1.1    jruoho 
    178       1.1    jruoho     {&AcpiGbl_XPm1bStatus,
    179       1.1    jruoho         ACPI_FADT_OFFSET (XPm1bEventBlock),
    180       1.1    jruoho         0},
    181       1.1    jruoho 
    182       1.1    jruoho     {&AcpiGbl_XPm1bEnable,
    183       1.1    jruoho         ACPI_FADT_OFFSET (XPm1bEventBlock),
    184       1.1    jruoho         1}
    185       1.1    jruoho };
    186       1.1    jruoho 
    187       1.1    jruoho #define ACPI_FADT_PM_INFO_ENTRIES \
    188       1.1    jruoho             (sizeof (FadtPmInfoTable) / sizeof (ACPI_FADT_PM_INFO))
    189       1.1    jruoho 
    190       1.1    jruoho 
    191       1.1    jruoho /*******************************************************************************
    192       1.1    jruoho  *
    193       1.1    jruoho  * FUNCTION:    AcpiTbInitGenericAddress
    194       1.1    jruoho  *
    195       1.1    jruoho  * PARAMETERS:  GenericAddress      - GAS struct to be initialized
    196       1.1    jruoho  *              SpaceId             - ACPI Space ID for this register
    197   1.1.1.3  christos  *              ByteWidth           - Width of this register
    198       1.1    jruoho  *              Address             - Address of the register
    199   1.1.1.3  christos  *              RegisterName        - ASCII name of the ACPI register
    200       1.1    jruoho  *
    201       1.1    jruoho  * RETURN:      None
    202       1.1    jruoho  *
    203       1.1    jruoho  * DESCRIPTION: Initialize a Generic Address Structure (GAS)
    204       1.1    jruoho  *              See the ACPI specification for a full description and
    205       1.1    jruoho  *              definition of this structure.
    206       1.1    jruoho  *
    207       1.1    jruoho  ******************************************************************************/
    208       1.1    jruoho 
    209   1.1.1.3  christos static void
    210       1.1    jruoho AcpiTbInitGenericAddress (
    211       1.1    jruoho     ACPI_GENERIC_ADDRESS    *GenericAddress,
    212       1.1    jruoho     UINT8                   SpaceId,
    213       1.1    jruoho     UINT8                   ByteWidth,
    214   1.1.1.3  christos     UINT64                  Address,
    215   1.1.1.8  christos     const char              *RegisterName,
    216   1.1.1.4  christos     UINT8                   Flags)
    217       1.1    jruoho {
    218   1.1.1.3  christos     UINT8                   BitWidth;
    219   1.1.1.3  christos 
    220   1.1.1.3  christos 
    221   1.1.1.4  christos     /*
    222   1.1.1.4  christos      * Bit width field in the GAS is only one byte long, 255 max.
    223   1.1.1.4  christos      * Check for BitWidth overflow in GAS.
    224   1.1.1.4  christos      */
    225   1.1.1.3  christos     BitWidth = (UINT8) (ByteWidth * 8);
    226   1.1.1.4  christos     if (ByteWidth > 31)     /* (31*8)=248, (32*8)=256 */
    227   1.1.1.3  christos     {
    228   1.1.1.4  christos         /*
    229   1.1.1.4  christos          * No error for GPE blocks, because we do not use the BitWidth
    230   1.1.1.4  christos          * for GPEs, the legacy length (ByteWidth) is used instead to
    231   1.1.1.4  christos          * allow for a large number of GPEs.
    232   1.1.1.4  christos          */
    233   1.1.1.4  christos         if (!(Flags & ACPI_FADT_GPE_REGISTER))
    234   1.1.1.4  christos         {
    235   1.1.1.4  christos             ACPI_ERROR ((AE_INFO,
    236   1.1.1.4  christos                 "%s - 32-bit FADT register is too long (%u bytes, %u bits) "
    237   1.1.1.4  christos                 "to convert to GAS struct - 255 bits max, truncating",
    238   1.1.1.4  christos                 RegisterName, ByteWidth, (ByteWidth * 8)));
    239   1.1.1.4  christos         }
    240   1.1.1.3  christos 
    241   1.1.1.3  christos         BitWidth = 255;
    242   1.1.1.3  christos     }
    243       1.1    jruoho 
    244       1.1    jruoho     /*
    245       1.1    jruoho      * The 64-bit Address field is non-aligned in the byte packed
    246       1.1    jruoho      * GAS struct.
    247       1.1    jruoho      */
    248       1.1    jruoho     ACPI_MOVE_64_TO_64 (&GenericAddress->Address, &Address);
    249       1.1    jruoho 
    250       1.1    jruoho     /* All other fields are byte-wide */
    251       1.1    jruoho 
    252       1.1    jruoho     GenericAddress->SpaceId = SpaceId;
    253   1.1.1.3  christos     GenericAddress->BitWidth = BitWidth;
    254       1.1    jruoho     GenericAddress->BitOffset = 0;
    255       1.1    jruoho     GenericAddress->AccessWidth = 0; /* Access width ANY */
    256       1.1    jruoho }
    257       1.1    jruoho 
    258       1.1    jruoho 
    259       1.1    jruoho /*******************************************************************************
    260       1.1    jruoho  *
    261   1.1.1.3  christos  * FUNCTION:    AcpiTbSelectAddress
    262   1.1.1.3  christos  *
    263   1.1.1.3  christos  * PARAMETERS:  RegisterName        - ASCII name of the ACPI register
    264   1.1.1.3  christos  *              Address32           - 32-bit address of the register
    265   1.1.1.3  christos  *              Address64           - 64-bit address of the register
    266   1.1.1.3  christos  *
    267   1.1.1.3  christos  * RETURN:      The resolved 64-bit address
    268   1.1.1.3  christos  *
    269   1.1.1.3  christos  * DESCRIPTION: Select between 32-bit and 64-bit versions of addresses within
    270   1.1.1.3  christos  *              the FADT. Used for the FACS and DSDT addresses.
    271   1.1.1.3  christos  *
    272   1.1.1.3  christos  * NOTES:
    273   1.1.1.3  christos  *
    274   1.1.1.3  christos  * Check for FACS and DSDT address mismatches. An address mismatch between
    275   1.1.1.3  christos  * the 32-bit and 64-bit address fields (FIRMWARE_CTRL/X_FIRMWARE_CTRL and
    276   1.1.1.3  christos  * DSDT/X_DSDT) could be a corrupted address field or it might indicate
    277   1.1.1.3  christos  * the presence of two FACS or two DSDT tables.
    278   1.1.1.3  christos  *
    279   1.1.1.3  christos  * November 2013:
    280   1.1.1.3  christos  * By default, as per the ACPICA specification, a valid 64-bit address is
    281   1.1.1.3  christos  * used regardless of the value of the 32-bit address. However, this
    282   1.1.1.3  christos  * behavior can be overridden via the AcpiGbl_Use32BitFadtAddresses flag.
    283   1.1.1.3  christos  *
    284   1.1.1.3  christos  ******************************************************************************/
    285   1.1.1.3  christos 
    286   1.1.1.3  christos static UINT64
    287   1.1.1.3  christos AcpiTbSelectAddress (
    288   1.1.1.3  christos     char                    *RegisterName,
    289   1.1.1.3  christos     UINT32                  Address32,
    290   1.1.1.3  christos     UINT64                  Address64)
    291   1.1.1.3  christos {
    292   1.1.1.3  christos 
    293   1.1.1.3  christos     if (!Address64)
    294   1.1.1.3  christos     {
    295   1.1.1.3  christos         /* 64-bit address is zero, use 32-bit address */
    296   1.1.1.3  christos 
    297   1.1.1.3  christos         return ((UINT64) Address32);
    298   1.1.1.3  christos     }
    299   1.1.1.3  christos 
    300   1.1.1.3  christos     if (Address32 &&
    301   1.1.1.3  christos        (Address64 != (UINT64) Address32))
    302   1.1.1.3  christos     {
    303   1.1.1.3  christos         /* Address mismatch between 32-bit and 64-bit versions */
    304   1.1.1.3  christos 
    305   1.1.1.3  christos         ACPI_BIOS_WARNING ((AE_INFO,
    306   1.1.1.3  christos             "32/64X %s address mismatch in FADT: "
    307   1.1.1.3  christos             "0x%8.8X/0x%8.8X%8.8X, using %u-bit address",
    308   1.1.1.3  christos             RegisterName, Address32, ACPI_FORMAT_UINT64 (Address64),
    309   1.1.1.3  christos             AcpiGbl_Use32BitFadtAddresses ? 32 : 64));
    310   1.1.1.3  christos 
    311   1.1.1.3  christos         /* 32-bit address override */
    312   1.1.1.3  christos 
    313   1.1.1.3  christos         if (AcpiGbl_Use32BitFadtAddresses)
    314   1.1.1.3  christos         {
    315   1.1.1.3  christos             return ((UINT64) Address32);
    316   1.1.1.3  christos         }
    317   1.1.1.3  christos     }
    318   1.1.1.3  christos 
    319   1.1.1.3  christos     /* Default is to use the 64-bit address */
    320   1.1.1.3  christos 
    321   1.1.1.3  christos     return (Address64);
    322   1.1.1.3  christos }
    323   1.1.1.3  christos 
    324   1.1.1.3  christos 
    325   1.1.1.3  christos /*******************************************************************************
    326   1.1.1.3  christos  *
    327       1.1    jruoho  * FUNCTION:    AcpiTbParseFadt
    328       1.1    jruoho  *
    329   1.1.1.7  christos  * PARAMETERS:  None
    330       1.1    jruoho  *
    331       1.1    jruoho  * RETURN:      None
    332       1.1    jruoho  *
    333       1.1    jruoho  * DESCRIPTION: Initialize the FADT, DSDT and FACS tables
    334       1.1    jruoho  *              (FADT contains the addresses of the DSDT and FACS)
    335       1.1    jruoho  *
    336       1.1    jruoho  ******************************************************************************/
    337       1.1    jruoho 
    338       1.1    jruoho void
    339       1.1    jruoho AcpiTbParseFadt (
    340   1.1.1.7  christos     void)
    341       1.1    jruoho {
    342       1.1    jruoho     UINT32                  Length;
    343       1.1    jruoho     ACPI_TABLE_HEADER       *Table;
    344  1.1.1.10  christos     ACPI_TABLE_DESC         *FadtDesc;
    345  1.1.1.10  christos     ACPI_STATUS             Status;
    346       1.1    jruoho 
    347       1.1    jruoho 
    348       1.1    jruoho     /*
    349       1.1    jruoho      * The FADT has multiple versions with different lengths,
    350       1.1    jruoho      * and it contains pointers to both the DSDT and FACS tables.
    351       1.1    jruoho      *
    352       1.1    jruoho      * Get a local copy of the FADT and convert it to a common format
    353       1.1    jruoho      * Map entire FADT, assumed to be smaller than one page.
    354       1.1    jruoho      */
    355  1.1.1.10  christos     FadtDesc = &AcpiGbl_RootTableList.Tables[AcpiGbl_FadtIndex];
    356  1.1.1.10  christos     Status = AcpiTbGetTable (FadtDesc, &Table);
    357  1.1.1.10  christos     if (ACPI_FAILURE (Status))
    358       1.1    jruoho     {
    359       1.1    jruoho         return;
    360       1.1    jruoho     }
    361  1.1.1.10  christos     Length = FadtDesc->Length;
    362       1.1    jruoho 
    363       1.1    jruoho     /*
    364       1.1    jruoho      * Validate the FADT checksum before we copy the table. Ignore
    365       1.1    jruoho      * checksum error as we want to try to get the DSDT and FACS.
    366       1.1    jruoho      */
    367       1.1    jruoho     (void) AcpiTbVerifyChecksum (Table, Length);
    368       1.1    jruoho 
    369       1.1    jruoho     /* Create a local copy of the FADT in common ACPI 2.0+ format */
    370       1.1    jruoho 
    371       1.1    jruoho     AcpiTbCreateLocalFadt (Table, Length);
    372       1.1    jruoho 
    373       1.1    jruoho     /* All done with the real FADT, unmap it */
    374       1.1    jruoho 
    375  1.1.1.10  christos     AcpiTbPutTable (FadtDesc);
    376       1.1    jruoho 
    377       1.1    jruoho     /* Obtain the DSDT and FACS tables via their addresses within the FADT */
    378       1.1    jruoho 
    379   1.1.1.9  christos     AcpiTbInstallStandardTable (
    380   1.1.1.9  christos         (ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.XDsdt,
    381   1.1.1.9  christos         ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, FALSE, TRUE,
    382   1.1.1.9  christos         &AcpiGbl_DsdtIndex);
    383       1.1    jruoho 
    384   1.1.1.3  christos     /* If Hardware Reduced flag is set, there is no FACS */
    385   1.1.1.3  christos 
    386   1.1.1.3  christos     if (!AcpiGbl_ReducedHardware)
    387   1.1.1.3  christos     {
    388   1.1.1.6  christos         if (AcpiGbl_FADT.Facs)
    389   1.1.1.6  christos         {
    390   1.1.1.9  christos             AcpiTbInstallStandardTable (
    391   1.1.1.9  christos                 (ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.Facs,
    392   1.1.1.9  christos                 ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, FALSE, TRUE,
    393   1.1.1.9  christos                 &AcpiGbl_FacsIndex);
    394   1.1.1.6  christos         }
    395   1.1.1.6  christos         if (AcpiGbl_FADT.XFacs)
    396   1.1.1.6  christos         {
    397   1.1.1.9  christos             AcpiTbInstallStandardTable (
    398   1.1.1.9  christos                 (ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.XFacs,
    399   1.1.1.9  christos                 ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, FALSE, TRUE,
    400   1.1.1.9  christos                 &AcpiGbl_XFacsIndex);
    401   1.1.1.6  christos         }
    402   1.1.1.3  christos     }
    403       1.1    jruoho }
    404       1.1    jruoho 
    405       1.1    jruoho 
    406       1.1    jruoho /*******************************************************************************
    407       1.1    jruoho  *
    408       1.1    jruoho  * FUNCTION:    AcpiTbCreateLocalFadt
    409       1.1    jruoho  *
    410       1.1    jruoho  * PARAMETERS:  Table               - Pointer to BIOS FADT
    411       1.1    jruoho  *              Length              - Length of the table
    412       1.1    jruoho  *
    413       1.1    jruoho  * RETURN:      None
    414       1.1    jruoho  *
    415       1.1    jruoho  * DESCRIPTION: Get a local copy of the FADT and convert it to a common format.
    416       1.1    jruoho  *              Performs validation on some important FADT fields.
    417       1.1    jruoho  *
    418       1.1    jruoho  * NOTE:        We create a local copy of the FADT regardless of the version.
    419       1.1    jruoho  *
    420       1.1    jruoho  ******************************************************************************/
    421       1.1    jruoho 
    422       1.1    jruoho void
    423       1.1    jruoho AcpiTbCreateLocalFadt (
    424       1.1    jruoho     ACPI_TABLE_HEADER       *Table,
    425       1.1    jruoho     UINT32                  Length)
    426       1.1    jruoho {
    427       1.1    jruoho 
    428       1.1    jruoho     /*
    429       1.1    jruoho      * Check if the FADT is larger than the largest table that we expect
    430   1.1.1.8  christos      * (typically the current ACPI specification version). If so, truncate
    431   1.1.1.8  christos      * the table, and issue a warning.
    432       1.1    jruoho      */
    433       1.1    jruoho     if (Length > sizeof (ACPI_TABLE_FADT))
    434       1.1    jruoho     {
    435   1.1.1.3  christos         ACPI_BIOS_WARNING ((AE_INFO,
    436   1.1.1.8  christos             "FADT (revision %u) is longer than %s length, "
    437       1.1    jruoho             "truncating length %u to %u",
    438   1.1.1.8  christos             Table->Revision, ACPI_FADT_CONFORMANCE, Length,
    439   1.1.1.8  christos             (UINT32) sizeof (ACPI_TABLE_FADT)));
    440       1.1    jruoho     }
    441       1.1    jruoho 
    442       1.1    jruoho     /* Clear the entire local FADT */
    443       1.1    jruoho 
    444   1.1.1.6  christos     memset (&AcpiGbl_FADT, 0, sizeof (ACPI_TABLE_FADT));
    445       1.1    jruoho 
    446       1.1    jruoho     /* Copy the original FADT, up to sizeof (ACPI_TABLE_FADT) */
    447       1.1    jruoho 
    448   1.1.1.6  christos     memcpy (&AcpiGbl_FADT, Table,
    449       1.1    jruoho         ACPI_MIN (Length, sizeof (ACPI_TABLE_FADT)));
    450       1.1    jruoho 
    451   1.1.1.3  christos     /* Take a copy of the Hardware Reduced flag */
    452       1.1    jruoho 
    453   1.1.1.3  christos     AcpiGbl_ReducedHardware = FALSE;
    454   1.1.1.3  christos     if (AcpiGbl_FADT.Flags & ACPI_FADT_HW_REDUCED)
    455   1.1.1.3  christos     {
    456   1.1.1.3  christos         AcpiGbl_ReducedHardware = TRUE;
    457   1.1.1.3  christos     }
    458       1.1    jruoho 
    459   1.1.1.3  christos     /* Convert the local copy of the FADT to the common internal format */
    460       1.1    jruoho 
    461   1.1.1.3  christos     AcpiTbConvertFadt ();
    462       1.1    jruoho 
    463       1.1    jruoho     /* Initialize the global ACPI register structures */
    464       1.1    jruoho 
    465       1.1    jruoho     AcpiTbSetupFadtRegisters ();
    466       1.1    jruoho }
    467       1.1    jruoho 
    468       1.1    jruoho 
    469       1.1    jruoho /*******************************************************************************
    470       1.1    jruoho  *
    471       1.1    jruoho  * FUNCTION:    AcpiTbConvertFadt
    472       1.1    jruoho  *
    473   1.1.1.3  christos  * PARAMETERS:  None - AcpiGbl_FADT is used.
    474       1.1    jruoho  *
    475       1.1    jruoho  * RETURN:      None
    476       1.1    jruoho  *
    477       1.1    jruoho  * DESCRIPTION: Converts all versions of the FADT to a common internal format.
    478   1.1.1.3  christos  *              Expand 32-bit addresses to 64-bit as necessary. Also validate
    479   1.1.1.3  christos  *              important fields within the FADT.
    480       1.1    jruoho  *
    481   1.1.1.3  christos  * NOTE:        AcpiGbl_FADT must be of size (ACPI_TABLE_FADT), and must
    482   1.1.1.3  christos  *              contain a copy of the actual BIOS-provided FADT.
    483       1.1    jruoho  *
    484       1.1    jruoho  * Notes on 64-bit register addresses:
    485       1.1    jruoho  *
    486       1.1    jruoho  * After this FADT conversion, later ACPICA code will only use the 64-bit "X"
    487       1.1    jruoho  * fields of the FADT for all ACPI register addresses.
    488       1.1    jruoho  *
    489   1.1.1.3  christos  * The 64-bit X fields are optional extensions to the original 32-bit FADT
    490       1.1    jruoho  * V1.0 fields. Even if they are present in the FADT, they are optional and
    491       1.1    jruoho  * are unused if the BIOS sets them to zero. Therefore, we must copy/expand
    492  1.1.1.11  christos  * 32-bit V1.0 fields to the 64-bit X fields if the 64-bit X field is originally
    493  1.1.1.11  christos  * zero.
    494       1.1    jruoho  *
    495   1.1.1.3  christos  * For ACPI 1.0 FADTs (that contain no 64-bit addresses), all 32-bit address
    496   1.1.1.3  christos  * fields are expanded to the corresponding 64-bit X fields in the internal
    497   1.1.1.3  christos  * common FADT.
    498       1.1    jruoho  *
    499       1.1    jruoho  * For ACPI 2.0+ FADTs, all valid (non-zero) 32-bit address fields are expanded
    500   1.1.1.3  christos  * to the corresponding 64-bit X fields, if the 64-bit field is originally
    501   1.1.1.3  christos  * zero. Adhering to the ACPI specification, we completely ignore the 32-bit
    502   1.1.1.3  christos  * field if the 64-bit field is valid, regardless of whether the host OS is
    503   1.1.1.3  christos  * 32-bit or 64-bit.
    504   1.1.1.3  christos  *
    505   1.1.1.3  christos  * Possible additional checks:
    506   1.1.1.3  christos  *  (AcpiGbl_FADT.Pm1EventLength >= 4)
    507   1.1.1.3  christos  *  (AcpiGbl_FADT.Pm1ControlLength >= 2)
    508   1.1.1.3  christos  *  (AcpiGbl_FADT.PmTimerLength >= 4)
    509   1.1.1.3  christos  *  Gpe block lengths must be multiple of 2
    510       1.1    jruoho  *
    511       1.1    jruoho  ******************************************************************************/
    512       1.1    jruoho 
    513       1.1    jruoho static void
    514       1.1    jruoho AcpiTbConvertFadt (
    515       1.1    jruoho     void)
    516       1.1    jruoho {
    517   1.1.1.8  christos     const char              *Name;
    518       1.1    jruoho     ACPI_GENERIC_ADDRESS    *Address64;
    519       1.1    jruoho     UINT32                  Address32;
    520   1.1.1.3  christos     UINT8                   Length;
    521   1.1.1.4  christos     UINT8                   Flags;
    522       1.1    jruoho     UINT32                  i;
    523       1.1    jruoho 
    524       1.1    jruoho 
    525       1.1    jruoho     /*
    526  1.1.1.10  christos      * For ACPI 1.0 FADTs (revision 1 or 2), ensure that reserved fields which
    527       1.1    jruoho      * should be zero are indeed zero. This will workaround BIOSs that
    528       1.1    jruoho      * inadvertently place values in these fields.
    529       1.1    jruoho      *
    530       1.1    jruoho      * The ACPI 1.0 reserved fields that will be zeroed are the bytes located
    531       1.1    jruoho      * at offset 45, 55, 95, and the word located at offset 109, 110.
    532   1.1.1.2    jruoho      *
    533  1.1.1.10  christos      * Note: The FADT revision value is unreliable. Only the length can be
    534  1.1.1.10  christos      * trusted.
    535       1.1    jruoho      */
    536  1.1.1.10  christos     if (AcpiGbl_FADT.Header.Length <= ACPI_FADT_V2_SIZE)
    537       1.1    jruoho     {
    538       1.1    jruoho         AcpiGbl_FADT.PreferredProfile = 0;
    539       1.1    jruoho         AcpiGbl_FADT.PstateControl = 0;
    540       1.1    jruoho         AcpiGbl_FADT.CstControl = 0;
    541       1.1    jruoho         AcpiGbl_FADT.BootFlags = 0;
    542       1.1    jruoho     }
    543       1.1    jruoho 
    544       1.1    jruoho     /*
    545   1.1.1.3  christos      * Now we can update the local FADT length to the length of the
    546   1.1.1.3  christos      * current FADT version as defined by the ACPI specification.
    547   1.1.1.3  christos      * Thus, we will have a common FADT internally.
    548       1.1    jruoho      */
    549   1.1.1.3  christos     AcpiGbl_FADT.Header.Length = sizeof (ACPI_TABLE_FADT);
    550       1.1    jruoho 
    551       1.1    jruoho     /*
    552   1.1.1.6  christos      * Expand the 32-bit DSDT addresses to 64-bit as necessary.
    553   1.1.1.3  christos      * Later ACPICA code will always use the X 64-bit field.
    554       1.1    jruoho      */
    555   1.1.1.3  christos     AcpiGbl_FADT.XDsdt = AcpiTbSelectAddress ("DSDT",
    556   1.1.1.3  christos         AcpiGbl_FADT.Dsdt, AcpiGbl_FADT.XDsdt);
    557       1.1    jruoho 
    558   1.1.1.3  christos     /* If Hardware Reduced flag is set, we are all done */
    559       1.1    jruoho 
    560   1.1.1.3  christos     if (AcpiGbl_ReducedHardware)
    561   1.1.1.3  christos     {
    562   1.1.1.3  christos         return;
    563       1.1    jruoho     }
    564       1.1    jruoho 
    565       1.1    jruoho     /* Examine all of the 64-bit extended address fields (X fields) */
    566       1.1    jruoho 
    567       1.1    jruoho     for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++)
    568       1.1    jruoho     {
    569       1.1    jruoho         /*
    570   1.1.1.3  christos          * Get the 32-bit and 64-bit addresses, as well as the register
    571   1.1.1.3  christos          * length and register name.
    572       1.1    jruoho          */
    573   1.1.1.3  christos         Address32 = *ACPI_ADD_PTR (UINT32,
    574   1.1.1.3  christos             &AcpiGbl_FADT, FadtInfoTable[i].Address32);
    575   1.1.1.3  christos 
    576       1.1    jruoho         Address64 = ACPI_ADD_PTR (ACPI_GENERIC_ADDRESS,
    577   1.1.1.3  christos             &AcpiGbl_FADT, FadtInfoTable[i].Address64);
    578   1.1.1.3  christos 
    579       1.1    jruoho         Length = *ACPI_ADD_PTR (UINT8,
    580   1.1.1.3  christos             &AcpiGbl_FADT, FadtInfoTable[i].Length);
    581   1.1.1.3  christos 
    582       1.1    jruoho         Name = FadtInfoTable[i].Name;
    583   1.1.1.4  christos         Flags = FadtInfoTable[i].Flags;
    584       1.1    jruoho 
    585       1.1    jruoho         /*
    586   1.1.1.3  christos          * Expand the ACPI 1.0 32-bit addresses to the ACPI 2.0 64-bit "X"
    587   1.1.1.3  christos          * generic address structures as necessary. Later code will always use
    588   1.1.1.3  christos          * the 64-bit address structures.
    589   1.1.1.3  christos          *
    590   1.1.1.3  christos          * November 2013:
    591   1.1.1.3  christos          * Now always use the 64-bit address if it is valid (non-zero), in
    592   1.1.1.3  christos          * accordance with the ACPI specification which states that a 64-bit
    593   1.1.1.3  christos          * address supersedes the 32-bit version. This behavior can be
    594   1.1.1.3  christos          * overridden by the AcpiGbl_Use32BitFadtAddresses flag.
    595   1.1.1.3  christos          *
    596   1.1.1.3  christos          * During 64-bit address construction and verification,
    597   1.1.1.3  christos          * these cases are handled:
    598   1.1.1.3  christos          *
    599   1.1.1.3  christos          * Address32 zero, Address64 [don't care]   - Use Address64
    600   1.1.1.3  christos          *
    601   1.1.1.9  christos          * No override: if AcpiGbl_Use32BitFadtAddresses is FALSE, and:
    602   1.1.1.3  christos          * Address32 non-zero, Address64 zero       - Copy/use Address32
    603   1.1.1.3  christos          * Address32 non-zero == Address64 non-zero - Use Address64
    604   1.1.1.3  christos          * Address32 non-zero != Address64 non-zero - Warning, use Address64
    605   1.1.1.3  christos          *
    606   1.1.1.3  christos          * Override: if AcpiGbl_Use32BitFadtAddresses is TRUE, and:
    607   1.1.1.9  christos          * Address32 non-zero, Address64 zero       - Copy/use Address32
    608   1.1.1.9  christos          * Address32 non-zero == Address64 non-zero - Copy/use Address32
    609   1.1.1.3  christos          * Address32 non-zero != Address64 non-zero - Warning, copy/use Address32
    610   1.1.1.3  christos          *
    611   1.1.1.3  christos          * Note: SpaceId is always I/O for 32-bit legacy address fields
    612   1.1.1.3  christos          */
    613   1.1.1.3  christos         if (Address32)
    614   1.1.1.3  christos         {
    615   1.1.1.9  christos             if (Address64->Address)
    616   1.1.1.3  christos             {
    617   1.1.1.9  christos                 if (Address64->Address != (UINT64) Address32)
    618   1.1.1.9  christos                 {
    619   1.1.1.9  christos                     /* Address mismatch */
    620   1.1.1.3  christos 
    621   1.1.1.9  christos                     ACPI_BIOS_WARNING ((AE_INFO,
    622   1.1.1.9  christos                         "32/64X address mismatch in FADT/%s: "
    623   1.1.1.9  christos                         "0x%8.8X/0x%8.8X%8.8X, using %u-bit address",
    624   1.1.1.9  christos                         Name, Address32,
    625   1.1.1.9  christos                         ACPI_FORMAT_UINT64 (Address64->Address),
    626   1.1.1.9  christos                         AcpiGbl_Use32BitFadtAddresses ? 32 : 64));
    627   1.1.1.9  christos                 }
    628   1.1.1.3  christos 
    629   1.1.1.9  christos                 /*
    630   1.1.1.9  christos                  * For each extended field, check for length mismatch
    631   1.1.1.9  christos                  * between the legacy length field and the corresponding
    632   1.1.1.9  christos                  * 64-bit X length field.
    633   1.1.1.9  christos                  * Note: If the legacy length field is > 0xFF bits, ignore
    634   1.1.1.9  christos                  * this check. (GPE registers can be larger than the
    635  1.1.1.13  christos                  * 64-bit GAS structure can accommodate, 0xFF bits).
    636   1.1.1.9  christos                  */
    637   1.1.1.9  christos                 if ((ACPI_MUL_8 (Length) <= ACPI_UINT8_MAX) &&
    638   1.1.1.9  christos                     (Address64->BitWidth != ACPI_MUL_8 (Length)))
    639   1.1.1.3  christos                 {
    640   1.1.1.9  christos                     ACPI_BIOS_WARNING ((AE_INFO,
    641   1.1.1.9  christos                         "32/64X length mismatch in FADT/%s: %u/%u",
    642   1.1.1.9  christos                         Name, ACPI_MUL_8 (Length), Address64->BitWidth));
    643   1.1.1.3  christos                 }
    644   1.1.1.3  christos             }
    645   1.1.1.3  christos 
    646   1.1.1.9  christos             /*
    647   1.1.1.9  christos              * Hardware register access code always uses the 64-bit fields.
    648   1.1.1.9  christos              * So if the 64-bit field is zero or is to be overridden,
    649   1.1.1.9  christos              * initialize it with the 32-bit fields.
    650   1.1.1.9  christos              * Note that when the 32-bit address favor is specified, the
    651   1.1.1.9  christos              * 64-bit fields are always re-initialized so that
    652   1.1.1.9  christos              * AccessSize/BitWidth/BitOffset fields can be correctly
    653   1.1.1.9  christos              * configured to the values to trigger a 32-bit compatible
    654   1.1.1.9  christos              * access mode in the hardware register access code.
    655   1.1.1.9  christos              */
    656   1.1.1.9  christos             if (!Address64->Address || AcpiGbl_Use32BitFadtAddresses)
    657   1.1.1.9  christos             {
    658   1.1.1.9  christos                 AcpiTbInitGenericAddress (Address64,
    659   1.1.1.9  christos                     ACPI_ADR_SPACE_SYSTEM_IO, Length,
    660   1.1.1.9  christos                     (UINT64) Address32, Name, Flags);
    661   1.1.1.9  christos             }
    662       1.1    jruoho         }
    663       1.1    jruoho 
    664   1.1.1.4  christos         if (FadtInfoTable[i].Flags & ACPI_FADT_REQUIRED)
    665       1.1    jruoho         {
    666       1.1    jruoho             /*
    667   1.1.1.3  christos              * Field is required (PM1aEvent, PM1aControl).
    668       1.1    jruoho              * Both the address and length must be non-zero.
    669       1.1    jruoho              */
    670       1.1    jruoho             if (!Address64->Address || !Length)
    671       1.1    jruoho             {
    672   1.1.1.3  christos                 ACPI_BIOS_ERROR ((AE_INFO,
    673   1.1.1.3  christos                     "Required FADT field %s has zero address and/or length: "
    674   1.1.1.3  christos                     "0x%8.8X%8.8X/0x%X",
    675       1.1    jruoho                     Name, ACPI_FORMAT_UINT64 (Address64->Address), Length));
    676       1.1    jruoho             }
    677       1.1    jruoho         }
    678   1.1.1.4  christos         else if (FadtInfoTable[i].Flags & ACPI_FADT_SEPARATE_LENGTH)
    679       1.1    jruoho         {
    680       1.1    jruoho             /*
    681       1.1    jruoho              * Field is optional (PM2Control, GPE0, GPE1) AND has its own
    682       1.1    jruoho              * length field. If present, both the address and length must
    683       1.1    jruoho              * be valid.
    684       1.1    jruoho              */
    685       1.1    jruoho             if ((Address64->Address && !Length) ||
    686       1.1    jruoho                 (!Address64->Address && Length))
    687       1.1    jruoho             {
    688   1.1.1.3  christos                 ACPI_BIOS_WARNING ((AE_INFO,
    689   1.1.1.8  christos                     "Optional FADT field %s has valid %s but zero %s: "
    690   1.1.1.8  christos                     "0x%8.8X%8.8X/0x%X", Name,
    691   1.1.1.8  christos                     (Length ? "Length" : "Address"),
    692   1.1.1.8  christos                     (Length ? "Address": "Length"),
    693   1.1.1.8  christos                     ACPI_FORMAT_UINT64 (Address64->Address), Length));
    694       1.1    jruoho             }
    695       1.1    jruoho         }
    696       1.1    jruoho     }
    697       1.1    jruoho }
    698       1.1    jruoho 
    699       1.1    jruoho 
    700       1.1    jruoho /*******************************************************************************
    701       1.1    jruoho  *
    702       1.1    jruoho  * FUNCTION:    AcpiTbSetupFadtRegisters
    703       1.1    jruoho  *
    704       1.1    jruoho  * PARAMETERS:  None, uses AcpiGbl_FADT.
    705       1.1    jruoho  *
    706       1.1    jruoho  * RETURN:      None
    707       1.1    jruoho  *
    708       1.1    jruoho  * DESCRIPTION: Initialize global ACPI PM1 register definitions. Optionally,
    709       1.1    jruoho  *              force FADT register definitions to their default lengths.
    710       1.1    jruoho  *
    711       1.1    jruoho  ******************************************************************************/
    712       1.1    jruoho 
    713       1.1    jruoho static void
    714       1.1    jruoho AcpiTbSetupFadtRegisters (
    715       1.1    jruoho     void)
    716       1.1    jruoho {
    717       1.1    jruoho     ACPI_GENERIC_ADDRESS    *Target64;
    718       1.1    jruoho     ACPI_GENERIC_ADDRESS    *Source64;
    719       1.1    jruoho     UINT8                   Pm1RegisterByteWidth;
    720       1.1    jruoho     UINT32                  i;
    721       1.1    jruoho 
    722       1.1    jruoho 
    723       1.1    jruoho     /*
    724       1.1    jruoho      * Optionally check all register lengths against the default values and
    725       1.1    jruoho      * update them if they are incorrect.
    726       1.1    jruoho      */
    727       1.1    jruoho     if (AcpiGbl_UseDefaultRegisterWidths)
    728       1.1    jruoho     {
    729       1.1    jruoho         for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++)
    730       1.1    jruoho         {
    731       1.1    jruoho             Target64 = ACPI_ADD_PTR (ACPI_GENERIC_ADDRESS, &AcpiGbl_FADT,
    732       1.1    jruoho                 FadtInfoTable[i].Address64);
    733       1.1    jruoho 
    734       1.1    jruoho             /*
    735       1.1    jruoho              * If a valid register (Address != 0) and the (DefaultLength > 0)
    736       1.1    jruoho              * (Not a GPE register), then check the width against the default.
    737       1.1    jruoho              */
    738       1.1    jruoho             if ((Target64->Address) &&
    739       1.1    jruoho                 (FadtInfoTable[i].DefaultLength > 0) &&
    740       1.1    jruoho                 (FadtInfoTable[i].DefaultLength != Target64->BitWidth))
    741       1.1    jruoho             {
    742   1.1.1.3  christos                 ACPI_BIOS_WARNING ((AE_INFO,
    743   1.1.1.3  christos                     "Invalid length for FADT/%s: %u, using default %u",
    744       1.1    jruoho                     FadtInfoTable[i].Name, Target64->BitWidth,
    745       1.1    jruoho                     FadtInfoTable[i].DefaultLength));
    746       1.1    jruoho 
    747       1.1    jruoho                 /* Incorrect size, set width to the default */
    748       1.1    jruoho 
    749       1.1    jruoho                 Target64->BitWidth = FadtInfoTable[i].DefaultLength;
    750       1.1    jruoho             }
    751       1.1    jruoho         }
    752       1.1    jruoho     }
    753       1.1    jruoho 
    754       1.1    jruoho     /*
    755       1.1    jruoho      * Get the length of the individual PM1 registers (enable and status).
    756       1.1    jruoho      * Each register is defined to be (event block length / 2). Extra divide
    757       1.1    jruoho      * by 8 converts bits to bytes.
    758       1.1    jruoho      */
    759       1.1    jruoho     Pm1RegisterByteWidth = (UINT8)
    760       1.1    jruoho         ACPI_DIV_16 (AcpiGbl_FADT.XPm1aEventBlock.BitWidth);
    761       1.1    jruoho 
    762       1.1    jruoho     /*
    763       1.1    jruoho      * Calculate separate GAS structs for the PM1x (A/B) Status and Enable
    764       1.1    jruoho      * registers. These addresses do not appear (directly) in the FADT, so it
    765       1.1    jruoho      * is useful to pre-calculate them from the PM1 Event Block definitions.
    766       1.1    jruoho      *
    767       1.1    jruoho      * The PM event blocks are split into two register blocks, first is the
    768       1.1    jruoho      * PM Status Register block, followed immediately by the PM Enable
    769       1.1    jruoho      * Register block. Each is of length (Pm1EventLength/2)
    770       1.1    jruoho      *
    771       1.1    jruoho      * Note: The PM1A event block is required by the ACPI specification.
    772       1.1    jruoho      * However, the PM1B event block is optional and is rarely, if ever,
    773       1.1    jruoho      * used.
    774       1.1    jruoho      */
    775       1.1    jruoho 
    776       1.1    jruoho     for (i = 0; i < ACPI_FADT_PM_INFO_ENTRIES; i++)
    777       1.1    jruoho     {
    778       1.1    jruoho         Source64 = ACPI_ADD_PTR (ACPI_GENERIC_ADDRESS, &AcpiGbl_FADT,
    779       1.1    jruoho             FadtPmInfoTable[i].Source);
    780       1.1    jruoho 
    781       1.1    jruoho         if (Source64->Address)
    782       1.1    jruoho         {
    783       1.1    jruoho             AcpiTbInitGenericAddress (FadtPmInfoTable[i].Target,
    784       1.1    jruoho                 Source64->SpaceId, Pm1RegisterByteWidth,
    785       1.1    jruoho                 Source64->Address +
    786   1.1.1.3  christos                     (FadtPmInfoTable[i].RegisterNum * Pm1RegisterByteWidth),
    787   1.1.1.4  christos                 "PmRegisters", 0);
    788       1.1    jruoho         }
    789       1.1    jruoho     }
    790       1.1    jruoho }
    791