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[mirror_edk2.git] / DynamicTablesPkg / Library / Common / SsdtSerialPortFixupLib / SsdtSerialPortFixupLib.c

/** @file\r
  SSDT Serial Port Fixup Library.\r
\r
  Copyright (c) 2019 - 2021, Arm Limited. All rights reserved.<BR>\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
  @par Reference(s):\r
  - Arm Server Base Boot Requirements (SBBR), s4.2.1.8 "SPCR".\r
  - Microsoft Debug Port Table 2 (DBG2) Specification - December 10, 2015.\r
**/\r
\r
#include <IndustryStandard/DebugPort2Table.h>\r
#include <Library/AcpiLib.h>\r
#include <Library/BaseLib.h>\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/MemoryAllocationLib.h>\r
#include <Protocol/AcpiTable.h>\r
\r
// Module specific include files.\r
#include <AcpiTableGenerator.h>\r
#include <ConfigurationManagerObject.h>\r
#include <ConfigurationManagerHelper.h>\r
#include <Library/AcpiHelperLib.h>\r
#include <Library/AmlLib/AmlLib.h>\r
#include <Protocol/ConfigurationManagerProtocol.h>\r
\r
/** C array containing the compiled AML template.\r
    This symbol is defined in the auto generated C file\r
    containing the AML bytecode array.\r
*/\r
extern CHAR8  ssdtserialporttemplate_aml_code[];\r
\r
/** UART address range length.\r
*/\r
#define MIN_UART_ADDRESS_LENGTH  0x1000U\r
\r
/** Validate the Serial Port Information.\r
\r
  @param [in]  SerialPortInfoTable    Table of CM_ARM_SERIAL_PORT_INFO.\r
  @param [in]  SerialPortCount        Count of SerialPort in the table.\r
\r
  @retval EFI_SUCCESS             Success.\r
  @retval EFI_INVALID_PARAMETER   Invalid parameter.\r
**/\r
EFI_STATUS\r
EFIAPI\r
ValidateSerialPortInfo (\r
  IN  CONST CM_ARM_SERIAL_PORT_INFO  *SerialPortInfoTable,\r
  IN        UINT32                   SerialPortCount\r
  )\r
{\r
  UINT32                         Index;\r
  CONST CM_ARM_SERIAL_PORT_INFO  *SerialPortInfo;\r
\r
  if ((SerialPortInfoTable == NULL)  ||\r
      (SerialPortCount == 0))\r
  {\r
    ASSERT (0);\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  for (Index = 0; Index < SerialPortCount; Index++) {\r
    SerialPortInfo = &SerialPortInfoTable[Index];\r
    ASSERT (SerialPortInfo != NULL);\r
\r
    if ((SerialPortInfo == NULL) ||\r
        (SerialPortInfo->BaseAddress == 0))\r
    {\r
      DEBUG ((\r
        DEBUG_ERROR,\r
        "ERROR: UART port base address is invalid. BaseAddress = 0x%llx\n",\r
        SerialPortInfo->BaseAddress\r
        ));\r
      return EFI_INVALID_PARAMETER;\r
    }\r
\r
    if ((SerialPortInfo->PortSubtype !=\r
         EFI_ACPI_DBG2_PORT_SUBTYPE_SERIAL_ARM_PL011_UART) &&\r
        (SerialPortInfo->PortSubtype !=\r
         EFI_ACPI_DBG2_PORT_SUBTYPE_SERIAL_ARM_SBSA_GENERIC_UART_2X) &&\r
        (SerialPortInfo->PortSubtype !=\r
         EFI_ACPI_DBG2_PORT_SUBTYPE_SERIAL_ARM_SBSA_GENERIC_UART) &&\r
        (SerialPortInfo->PortSubtype !=\r
         EFI_ACPI_DBG2_PORT_SUBTYPE_SERIAL_DCC) &&\r
        (SerialPortInfo->PortSubtype !=\r
         EFI_ACPI_DBG2_PORT_SUBTYPE_SERIAL_FULL_16550))\r
    {\r
      DEBUG ((\r
        DEBUG_ERROR,\r
        "ERROR: UART port subtype is invalid."\r
        " UART Base  = 0x%llx, PortSubtype = 0x%x\n",\r
        SerialPortInfo->BaseAddress,\r
        SerialPortInfo->PortSubtype\r
        ));\r
      return EFI_INVALID_PARAMETER;\r
    }\r
\r
    DEBUG ((DEBUG_INFO, "UART Configuration:\n"));\r
    DEBUG ((\r
      DEBUG_INFO,\r
      "  UART Base  = 0x%llx\n",\r
      SerialPortInfo->BaseAddress\r
      ));\r
    DEBUG ((\r
      DEBUG_INFO,\r
      "  Length     = 0x%llx\n",\r
      SerialPortInfo->BaseAddressLength\r
      ));\r
    DEBUG ((DEBUG_INFO, "  Clock      = %lu\n", SerialPortInfo->Clock));\r
    DEBUG ((DEBUG_INFO, "  BaudRate   = %llu\n", SerialPortInfo->BaudRate));\r
    DEBUG ((DEBUG_INFO, "  Interrupt  = %lu\n", SerialPortInfo->Interrupt));\r
  } // for\r
\r
  return EFI_SUCCESS;\r
}\r
\r
/** Fixup the Serial Port Ids (_UID, _HID, _CID).\r
\r
  @param  [in]  RootNodeHandle  Pointer to the root of an AML tree.\r
  @param  [in]  Uid             UID for the Serial Port.\r
  @param  [in]  SerialPortInfo  Pointer to a Serial Port Information\r
                                structure.\r
                                Get the Serial Port Information from there.\r
\r
  @retval  EFI_SUCCESS            The function completed successfully.\r
  @retval  EFI_INVALID_PARAMETER  Invalid parameter.\r
  @retval  EFI_NOT_FOUND          Could not find information.\r
  @retval  EFI_OUT_OF_RESOURCES   Out of resources.\r
**/\r
STATIC\r
EFI_STATUS\r
EFIAPI\r
FixupIds (\r
  IN        AML_ROOT_NODE_HANDLE     RootNodeHandle,\r
  IN  CONST UINT64                   Uid,\r
  IN  CONST CM_ARM_SERIAL_PORT_INFO  *SerialPortInfo\r
  )\r
{\r
  EFI_STATUS              Status;\r
  AML_OBJECT_NODE_HANDLE  NameOpIdNode;\r
  CONST CHAR8             *HidString;\r
  CONST CHAR8             *CidString;\r
  CONST CHAR8             *NonBsaHid;\r
\r
  // Get the _CID and _HID value to write.\r
  switch (SerialPortInfo->PortSubtype) {\r
    case EFI_ACPI_DBG2_PORT_SUBTYPE_SERIAL_FULL_16550:\r
    {\r
      // If there is a non-BSA compliant HID, use that.\r
      NonBsaHid = (CONST CHAR8 *)PcdGetPtr (PcdNonBsaCompliant16550SerialHid);\r
      if ((NonBsaHid != NULL) && (AsciiStrLen (NonBsaHid) != 0)) {\r
        if (!(IsValidPnpId (NonBsaHid) || IsValidAcpiId (NonBsaHid))) {\r
          return EFI_INVALID_PARAMETER;\r
        }\r
\r
        HidString = NonBsaHid;\r
        CidString = "";\r
      } else {\r
        HidString = "PNP0501";\r
        CidString = "PNP0500";\r
      }\r
\r
      break;\r
    }\r
    case EFI_ACPI_DBG2_PORT_SUBTYPE_SERIAL_ARM_PL011_UART:\r
    {\r
      HidString = "ARMH0011";\r
      CidString = "ARMHB000";\r
      break;\r
    }\r
    case EFI_ACPI_DBG2_PORT_SUBTYPE_SERIAL_ARM_SBSA_GENERIC_UART:\r
    case EFI_ACPI_DBG2_PORT_SUBTYPE_SERIAL_ARM_SBSA_GENERIC_UART_2X:\r
    {\r
      HidString = "ARMH0011";\r
      CidString = "";\r
      break;\r
    }\r
    default:\r
    {\r
      return EFI_INVALID_PARAMETER;\r
    }\r
  } // switch\r
\r
  // Get the _UID NameOp object defined by the "Name ()" statement,\r
  // and update its value.\r
  Status = AmlFindNode (\r
             RootNodeHandle,\r
             "\\_SB_.COM0._UID",\r
             &NameOpIdNode\r
             );\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  Status = AmlNameOpUpdateInteger (NameOpIdNode, (UINT64)Uid);\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  // Get the _HID NameOp object defined by the "Name ()" statement,\r
  // and update its value.\r
  Status = AmlFindNode (\r
             RootNodeHandle,\r
             "\\_SB_.COM0._HID",\r
             &NameOpIdNode\r
             );\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  Status = AmlNameOpUpdateString (NameOpIdNode, HidString);\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  // Get the _CID NameOp object defined by the "Name ()" statement,\r
  // and update its value.\r
  Status = AmlFindNode (\r
             RootNodeHandle,\r
             "\\_SB_.COM0._CID",\r
             &NameOpIdNode\r
             );\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  // If we have a CID then update a _CID node else delete the node.\r
  if (AsciiStrLen (CidString) != 0) {\r
    Status = AmlNameOpUpdateString (NameOpIdNode, CidString);\r
  } else {\r
    // First detach the node from the tree.\r
    Status = AmlDetachNode (NameOpIdNode);\r
    if (EFI_ERROR (Status)) {\r
      return Status;\r
    }\r
\r
    // Delete the detached node.\r
    Status = AmlDeleteTree (NameOpIdNode);\r
  }\r
\r
  return Status;\r
}\r
\r
/** Fixup the Serial Port _CRS values (BaseAddress, ...).\r
\r
  @param  [in]  RootNodeHandle  Pointer to the root of an AML tree.\r
  @param  [in]  SerialPortInfo  Pointer to a Serial Port Information\r
                                structure.\r
                                Get the Serial Port Information from there.\r
\r
  @retval  EFI_SUCCESS            The function completed successfully.\r
  @retval  EFI_INVALID_PARAMETER  Invalid parameter.\r
  @retval  EFI_NOT_FOUND          Could not find information.\r
  @retval  EFI_OUT_OF_RESOURCES   Out of resources.\r
**/\r
STATIC\r
EFI_STATUS\r
EFIAPI\r
FixupCrs (\r
  IN        AML_ROOT_NODE_HANDLE     RootNodeHandle,\r
  IN  CONST CM_ARM_SERIAL_PORT_INFO  *SerialPortInfo\r
  )\r
{\r
  EFI_STATUS              Status;\r
  AML_OBJECT_NODE_HANDLE  NameOpCrsNode;\r
  AML_DATA_NODE_HANDLE    QWordRdNode;\r
  AML_DATA_NODE_HANDLE    InterruptRdNode;\r
\r
  // Get the "_CRS" object defined by the "Name ()" statement.\r
  Status = AmlFindNode (\r
             RootNodeHandle,\r
             "\\_SB_.COM0._CRS",\r
             &NameOpCrsNode\r
             );\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  // Get the first Rd node in the "_CRS" object.\r
  Status = AmlNameOpGetFirstRdNode (NameOpCrsNode, &QWordRdNode);\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  if (QWordRdNode == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  // Update the Serial Port base address and length.\r
  Status = AmlUpdateRdQWord (\r
             QWordRdNode,\r
             SerialPortInfo->BaseAddress,\r
             ((SerialPortInfo->BaseAddressLength < MIN_UART_ADDRESS_LENGTH) ?\r
              MIN_UART_ADDRESS_LENGTH : SerialPortInfo->BaseAddressLength)\r
             );\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  // Get the Interrupt node.\r
  // It is the second Resource Data element in the NameOpCrsNode's\r
  // variable list of arguments.\r
  Status = AmlNameOpGetNextRdNode (QWordRdNode, &InterruptRdNode);\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  if (InterruptRdNode == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  // Update the interrupt number.\r
  return AmlUpdateRdInterrupt (InterruptRdNode, SerialPortInfo->Interrupt);\r
}\r
\r
/** Fixup the Serial Port device name.\r
\r
  @param  [in]  RootNodeHandle  Pointer to the root of an AML tree.\r
  @param  [in]  SerialPortInfo  Pointer to a Serial Port Information\r
                                structure.\r
                                Get the Serial Port Information from there.\r
  @param  [in]  Name            The Name to give to the Device.\r
                                Must be a NULL-terminated ASL NameString\r
                                e.g.: "DEV0", "DV15.DEV0", etc.\r
\r
  @retval  EFI_SUCCESS            The function completed successfully.\r
  @retval  EFI_INVALID_PARAMETER  Invalid parameter.\r
  @retval  EFI_NOT_FOUND          Could not find information.\r
  @retval  EFI_OUT_OF_RESOURCES   Out of resources.\r
**/\r
STATIC\r
EFI_STATUS\r
EFIAPI\r
FixupName (\r
  IN        AML_ROOT_NODE_HANDLE     RootNodeHandle,\r
  IN  CONST CM_ARM_SERIAL_PORT_INFO  *SerialPortInfo,\r
  IN  CONST CHAR8                    *Name\r
  )\r
{\r
  EFI_STATUS              Status;\r
  AML_OBJECT_NODE_HANDLE  DeviceNode;\r
\r
  // Get the COM0 variable defined by the "Device ()" statement.\r
  Status = AmlFindNode (RootNodeHandle, "\\_SB_.COM0", &DeviceNode);\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  // Update the Device's name.\r
  return AmlDeviceOpUpdateName (DeviceNode, (CHAR8 *)Name);\r
}\r
\r
/** Fixup the Serial Port Information in the AML tree.\r
\r
  For each template value:\r
   - find the node to update;\r
   - update the value.\r
\r
  @param  [in]  RootNodeHandle  Pointer to the root of the AML tree.\r
  @param  [in]  SerialPortInfo  Pointer to a Serial Port Information\r
                                structure.\r
                                Get the Serial Port Information from there.\r
  @param  [in]  Name            The Name to give to the Device.\r
                                Must be a NULL-terminated ASL NameString\r
                                e.g.: "DEV0", "DV15.DEV0", etc.\r
  @param  [in]  Uid             UID for the Serial Port.\r
  @param  [out] Table           If success, contains the serialized\r
                                SSDT table.\r
\r
  @retval  EFI_SUCCESS            The function completed successfully.\r
  @retval  EFI_INVALID_PARAMETER  Invalid parameter.\r
  @retval  EFI_NOT_FOUND          Could not find information.\r
  @retval  EFI_OUT_OF_RESOURCES   Out of resources.\r
**/\r
STATIC\r
EFI_STATUS\r
EFIAPI\r
FixupSerialPortInfo (\r
  IN            AML_ROOT_NODE_HANDLE     RootNodeHandle,\r
  IN      CONST CM_ARM_SERIAL_PORT_INFO  *SerialPortInfo,\r
  IN      CONST CHAR8                    *Name,\r
  IN      CONST UINT64                   Uid,\r
  OUT       EFI_ACPI_DESCRIPTION_HEADER  **Table\r
  )\r
{\r
  EFI_STATUS  Status;\r
\r
  ASSERT (RootNodeHandle != NULL);\r
  ASSERT (SerialPortInfo != NULL);\r
  ASSERT (Name != NULL);\r
  ASSERT (Table != NULL);\r
\r
  // Fixup the _UID, _HID and _CID values.\r
  Status = FixupIds (RootNodeHandle, Uid, SerialPortInfo);\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  // Fixup the _CRS values.\r
  Status = FixupCrs (RootNodeHandle, SerialPortInfo);\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  // Fixup the serial-port name.\r
  // This MUST be done at the end, otherwise AML paths won't be valid anymore.\r
  return FixupName (RootNodeHandle, SerialPortInfo, Name);\r
}\r
\r
/** Free an SSDT table previously created by\r
    the BuildSsdtSerialTable function.\r
\r
  @param [in] Table   Pointer to a SSDT table allocated by\r
                      the BuildSsdtSerialTable function.\r
\r
  @retval EFI_SUCCESS           Success.\r
**/\r
EFI_STATUS\r
EFIAPI\r
FreeSsdtSerialPortTable (\r
  IN EFI_ACPI_DESCRIPTION_HEADER  *Table\r
  )\r
{\r
  ASSERT (Table != NULL);\r
  FreePool (Table);\r
  return EFI_SUCCESS;\r
}\r
\r
/** Build a SSDT table describing the input serial port.\r
\r
  The table created by this function must be freed by FreeSsdtSerialTable.\r
\r
  @param [in]  AcpiTableInfo    Pointer to the ACPI table information.\r
  @param [in]  SerialPortInfo   Serial port to describe in the SSDT table.\r
  @param [in]  Name             The Name to give to the Device.\r
                                Must be a NULL-terminated ASL NameString\r
                                e.g.: "DEV0", "DV15.DEV0", etc.\r
  @param [in]  Uid              UID for the Serial Port.\r
  @param [out] Table            If success, pointer to the created SSDT table.\r
\r
  @retval EFI_SUCCESS            Table generated successfully.\r
  @retval EFI_INVALID_PARAMETER  A parameter is invalid.\r
  @retval EFI_NOT_FOUND          Could not find information.\r
  @retval EFI_OUT_OF_RESOURCES   Could not allocate memory.\r
**/\r
EFI_STATUS\r
EFIAPI\r
BuildSsdtSerialPortTable (\r
  IN  CONST CM_STD_OBJ_ACPI_TABLE_INFO   *AcpiTableInfo,\r
  IN  CONST CM_ARM_SERIAL_PORT_INFO      *SerialPortInfo,\r
  IN  CONST CHAR8                        *Name,\r
  IN  CONST UINT64                       Uid,\r
  OUT       EFI_ACPI_DESCRIPTION_HEADER  **Table\r
  )\r
{\r
  EFI_STATUS            Status;\r
  EFI_STATUS            Status1;\r
  AML_ROOT_NODE_HANDLE  RootNodeHandle;\r
\r
  ASSERT (AcpiTableInfo != NULL);\r
  ASSERT (SerialPortInfo != NULL);\r
  ASSERT (Name != NULL);\r
  ASSERT (Table != NULL);\r
\r
  // Validate the Serial Port Info.\r
  Status = ValidateSerialPortInfo (SerialPortInfo, 1);\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  // Parse the SSDT Serial Port Template.\r
  Status = AmlParseDefinitionBlock (\r
             (EFI_ACPI_DESCRIPTION_HEADER *)ssdtserialporttemplate_aml_code,\r
             &RootNodeHandle\r
             );\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((\r
      DEBUG_ERROR,\r
      "ERROR: SSDT-SERIAL-PORT-FIXUP:"\r
      " Failed to parse SSDT Serial Port Template. Status = %r\n",\r
      Status\r
      ));\r
    return Status;\r
  }\r
\r
  // Fixup the template values.\r
  Status = FixupSerialPortInfo (\r
             RootNodeHandle,\r
             SerialPortInfo,\r
             Name,\r
             Uid,\r
             Table\r
             );\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((\r
      DEBUG_ERROR,\r
      "ERROR: SSDT-SERIAL-PORT-FIXUP: Failed to fixup SSDT Serial Port Table."\r
      " Status = %r\n",\r
      Status\r
      ));\r
    goto exit_handler;\r
  }\r
\r
  // Serialize the tree.\r
  Status = AmlSerializeDefinitionBlock (\r
             RootNodeHandle,\r
             Table\r
             );\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((\r
      DEBUG_ERROR,\r
      "ERROR: SSDT-SERIAL-PORT-FIXUP: Failed to Serialize SSDT Table Data."\r
      " Status = %r\n",\r
      Status\r
      ));\r
  }\r
\r
exit_handler:\r
  // Cleanup\r
  if (RootNodeHandle != NULL) {\r
    Status1 = AmlDeleteTree (RootNodeHandle);\r
    if (EFI_ERROR (Status1)) {\r
      DEBUG ((\r
        DEBUG_ERROR,\r
        "ERROR: SSDT-SERIAL-PORT-FIXUP: Failed to cleanup AML tree."\r
        " Status = %r\n",\r
        Status1\r
        ));\r
      // If Status was success but we failed to delete the AML Tree\r
      // return Status1 else return the original error code, i.e. Status.\r
      if (!EFI_ERROR (Status)) {\r
        return Status1;\r
      }\r
    }\r
  }\r
\r
  return Status;\r
}\r