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[mirror_edk2.git] / DynamicTablesPkg / Library / Acpi / Arm / AcpiSpcrLibArm / SpcrGenerator.c

/** @file\r
  SPCR Table Generator\r
\r
  Copyright (c) 2017 - 2021, Arm Limited. All rights reserved.<BR>\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
  @par Reference(s):\r
  - Microsoft Serial Port Console Redirection Table\r
    Specification - Version 1.03 - August 10, 2015.\r
\r
**/\r
\r
#include <IndustryStandard/DebugPort2Table.h>\r
#include <IndustryStandard/SerialPortConsoleRedirectionTable.h>\r
#include <Library/AcpiLib.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/SsdtSerialPortFixupLib.h>\r
#include <Library/TableHelperLib.h>\r
#include <Protocol/ConfigurationManagerProtocol.h>\r
\r
/** ARM standard SPCR Table Generator\r
\r
  Constructs the SPCR table for PL011 or SBSA UART peripherals.\r
\r
Requirements:\r
  The following Configuration Manager Object(s) are required by\r
  this Generator:\r
  - EArmObjSerialConsolePortInfo\r
\r
NOTE: This implementation ignores the possibility that the Serial settings may\r
      be modified from the UEFI Shell.  A more complex handler would be needed\r
      to (e.g.) recover serial port settings from the UART, or non-volatile\r
      storage.\r
*/\r
\r
#pragma pack(1)\r
\r
/** A string representing the name of the SPCR port.\r
*/\r
#define NAME_STR_SPCR_PORT  "COM1"\r
\r
/** An UID representing the SPCR port.\r
*/\r
#define UID_SPCR_PORT  1\r
\r
/** This macro defines the no flow control option.\r
*/\r
#define SPCR_FLOW_CONTROL_NONE  0\r
\r
/**A template for generating the SPCR Table.\r
\r
  Note: fields marked "{Template}" will be updated dynamically.\r
*/\r
STATIC\r
EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE  AcpiSpcr = {\r
  ACPI_HEADER (\r
    EFI_ACPI_6_2_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_SIGNATURE,\r
    EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE,\r
    EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_REVISION\r
    ),\r
  0, // {Template}: Serial Port Subtype\r
  {\r
    EFI_ACPI_RESERVED_BYTE,\r
    EFI_ACPI_RESERVED_BYTE,\r
    EFI_ACPI_RESERVED_BYTE\r
  },\r
  ARM_GAS32 (0), // {Template}: Serial Port Base Address\r
  EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_INTERRUPT_TYPE_GIC,\r
  0, // Not used on ARM\r
  0, // {Template}: Serial Port Interrupt\r
  0, // {Template}: Serial Port Baudrate\r
  EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_PARITY_NO_PARITY,\r
  EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_STOP_BITS_1,\r
  SPCR_FLOW_CONTROL_NONE,\r
  EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_TERMINAL_TYPE_ANSI,\r
  EFI_ACPI_RESERVED_BYTE,\r
  0xFFFF,\r
  0xFFFF,\r
  0x00,\r
  0x00,\r
  0x00,\r
  0x00000000,\r
  0x00,\r
  EFI_ACPI_RESERVED_DWORD\r
};\r
\r
#pragma pack()\r
\r
/** This macro expands to a function that retrieves the Serial\r
    Port Information from the Configuration Manager.\r
*/\r
GET_OBJECT_LIST (\r
  EObjNameSpaceArm,\r
  EArmObjSerialConsolePortInfo,\r
  CM_ARM_SERIAL_PORT_INFO\r
  )\r
\r
/** Free any resources allocated for constructing the tables.\r
\r
  @param [in]      This           Pointer to the ACPI table generator.\r
  @param [in]      AcpiTableInfo  Pointer to the ACPI Table Info.\r
  @param [in]      CfgMgrProtocol Pointer to the Configuration Manager\r
                                  Protocol Interface.\r
  @param [in, out] Table          Pointer to an array of pointers\r
                                  to ACPI Table(s).\r
  @param [in]      TableCount     Number of ACPI table(s).\r
\r
  @retval EFI_SUCCESS           The resources were freed successfully.\r
  @retval EFI_INVALID_PARAMETER The table pointer is NULL or invalid.\r
**/\r
STATIC\r
EFI_STATUS\r
EFIAPI\r
FreeSpcrTableEx (\r
  IN      CONST ACPI_TABLE_GENERATOR                   *CONST  This,\r
  IN      CONST CM_STD_OBJ_ACPI_TABLE_INFO             *CONST  AcpiTableInfo,\r
  IN      CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL   *CONST  CfgMgrProtocol,\r
  IN OUT        EFI_ACPI_DESCRIPTION_HEADER          ***CONST  Table,\r
  IN      CONST UINTN                                          TableCount\r
  )\r
{\r
  EFI_STATUS                   Status;\r
  EFI_ACPI_DESCRIPTION_HEADER  **TableList;\r
\r
  ASSERT (This != NULL);\r
  ASSERT (AcpiTableInfo != NULL);\r
  ASSERT (CfgMgrProtocol != NULL);\r
  ASSERT (AcpiTableInfo->TableGeneratorId == This->GeneratorID);\r
  ASSERT (AcpiTableInfo->AcpiTableSignature == This->AcpiTableSignature);\r
\r
  if ((Table == NULL)   ||\r
      (*Table == NULL)  ||\r
      (TableCount != 2))\r
  {\r
    DEBUG ((DEBUG_ERROR, "ERROR: SPCR: Invalid Table Pointer\n"));\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  TableList = *Table;\r
\r
  if ((TableList[1] == NULL) ||\r
      (TableList[1]->Signature !=\r
       EFI_ACPI_6_3_SECONDARY_SYSTEM_DESCRIPTION_TABLE_SIGNATURE))\r
  {\r
    DEBUG ((DEBUG_ERROR, "ERROR: SPCR: Invalid SSDT table pointer.\n"));\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  // Only need to free the SSDT table at index 1. The SPCR table is static.\r
  Status = FreeSsdtSerialPortTable (TableList[1]);\r
  ASSERT_EFI_ERROR (Status);\r
\r
  // Free the table list.\r
  FreePool (*Table);\r
\r
  return Status;\r
}\r
\r
/** Construct the SPCR ACPI table and its associated SSDT table.\r
\r
  This function invokes the Configuration Manager protocol interface\r
  to get the required hardware information for generating the ACPI\r
  table.\r
\r
  If this function allocates any resources then they must be freed\r
  in the FreeXXXXTableResourcesEx function.\r
\r
  @param [in]  This            Pointer to the ACPI table generator.\r
  @param [in]  AcpiTableInfo   Pointer to the ACPI table information.\r
  @param [in]  CfgMgrProtocol  Pointer to the Configuration Manager\r
                               Protocol interface.\r
  @param [out] Table           Pointer to a list of generated ACPI table(s).\r
  @param [out] TableCount      Number of generated ACPI table(s).\r
\r
  @retval EFI_SUCCESS            Table generated successfully.\r
  @retval EFI_BAD_BUFFER_SIZE    The size returned by the Configuration\r
                                 Manager is less than the Object size for\r
                                 the requested object.\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
  @retval EFI_UNSUPPORTED        Unsupported configuration.\r
**/\r
STATIC\r
EFI_STATUS\r
EFIAPI\r
BuildSpcrTableEx (\r
  IN  CONST ACPI_TABLE_GENERATOR                           *This,\r
  IN  CONST CM_STD_OBJ_ACPI_TABLE_INFO             *CONST  AcpiTableInfo,\r
  IN  CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL   *CONST  CfgMgrProtocol,\r
  OUT       EFI_ACPI_DESCRIPTION_HEADER                    ***Table,\r
  OUT       UINTN                                  *CONST  TableCount\r
  )\r
{\r
  EFI_STATUS                   Status;\r
  CM_ARM_SERIAL_PORT_INFO      *SerialPortInfo;\r
  UINT32                       SerialPortCount;\r
  EFI_ACPI_DESCRIPTION_HEADER  **TableList;\r
\r
  ASSERT (This != NULL);\r
  ASSERT (AcpiTableInfo != NULL);\r
  ASSERT (CfgMgrProtocol != NULL);\r
  ASSERT (Table != NULL);\r
  ASSERT (TableCount != NULL);\r
  ASSERT (AcpiTableInfo->TableGeneratorId == This->GeneratorID);\r
  ASSERT (AcpiTableInfo->AcpiTableSignature == This->AcpiTableSignature);\r
\r
  if ((AcpiTableInfo->AcpiTableRevision < This->MinAcpiTableRevision) ||\r
      (AcpiTableInfo->AcpiTableRevision > This->AcpiTableRevision))\r
  {\r
    DEBUG ((\r
      DEBUG_ERROR,\r
      "ERROR: SPCR: Requested table revision = %d, is not supported."\r
      "Supported table revision: Minimum = %d, Maximum = %d\n",\r
      AcpiTableInfo->AcpiTableRevision,\r
      This->MinAcpiTableRevision,\r
      This->AcpiTableRevision\r
      ));\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  *Table = NULL;\r
\r
  Status = GetEArmObjSerialConsolePortInfo (\r
             CfgMgrProtocol,\r
             CM_NULL_TOKEN,\r
             &SerialPortInfo,\r
             &SerialPortCount\r
             );\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((\r
      DEBUG_ERROR,\r
      "ERROR: SPCR: Failed to get serial port information. Status = %r\n",\r
      Status\r
      ));\r
    return Status;\r
  }\r
\r
  if (SerialPortCount == 0) {\r
    DEBUG ((\r
      DEBUG_ERROR,\r
      "ERROR: SPCR: Serial port information not found. Status = %r\n",\r
      EFI_NOT_FOUND\r
      ));\r
    return EFI_NOT_FOUND;\r
  }\r
\r
  // Validate the SerialPort info. Only one SPCR port can be described.\r
  // If platform provides description for multiple SPCR ports, use the\r
  // first SPCR port information.\r
  Status = ValidateSerialPortInfo (SerialPortInfo, 1);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((\r
      DEBUG_ERROR,\r
      "ERROR: SPCR: Invalid serial port information. Status = %r\n",\r
      Status\r
      ));\r
    return Status;\r
  }\r
\r
  // Allocate a table to store pointers to the SPCR and SSDT tables.\r
  TableList = (EFI_ACPI_DESCRIPTION_HEADER **)\r
              AllocateZeroPool (sizeof (EFI_ACPI_DESCRIPTION_HEADER *) * 2);\r
  if (TableList == NULL) {\r
    Status = EFI_OUT_OF_RESOURCES;\r
    DEBUG ((\r
      DEBUG_ERROR,\r
      "ERROR: SPCR: Failed to allocate memory for Table List," \\r
      " Status = %r\n",\r
      Status\r
      ));\r
    return Status;\r
  }\r
\r
  // Build SPCR table.\r
  Status = AddAcpiHeader (\r
             CfgMgrProtocol,\r
             This,\r
             (EFI_ACPI_DESCRIPTION_HEADER *)&AcpiSpcr,\r
             AcpiTableInfo,\r
             sizeof (EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE)\r
             );\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((\r
      DEBUG_ERROR,\r
      "ERROR: SPCR: Failed to add ACPI header. Status = %r\n",\r
      Status\r
      ));\r
    goto error_handler;\r
  }\r
\r
  // The SPCR InterfaceType uses the same encoding as that of the\r
  // DBG2 table Port Subtype field. However InterfaceType is 8-bit\r
  // while the Port Subtype field in the DBG2 table is 16-bit.\r
  if ((SerialPortInfo->PortSubtype & 0xFF00) != 0) {\r
    Status = EFI_INVALID_PARAMETER;\r
    DEBUG ((\r
      DEBUG_ERROR,\r
      "ERROR: SPCR: Invalid Port subtype (must be < 256). Status = %r\n",\r
      Status\r
      ));\r
    goto error_handler;\r
  }\r
\r
  // Update the serial port subtype\r
  AcpiSpcr.InterfaceType = (UINT8)SerialPortInfo->PortSubtype;\r
\r
  // Update the base address\r
  AcpiSpcr.BaseAddress.Address = SerialPortInfo->BaseAddress;\r
\r
  // Set the access size\r
  if (SerialPortInfo->AccessSize >= EFI_ACPI_6_3_QWORD) {\r
    Status = EFI_INVALID_PARAMETER;\r
    DEBUG ((\r
      DEBUG_ERROR,\r
      "ERROR: SPCR: Access size must be <= 3 (DWORD). Status = %r\n",\r
      Status\r
      ));\r
    goto error_handler;\r
  } else if (SerialPortInfo->AccessSize == EFI_ACPI_6_3_UNDEFINED) {\r
    // 0 Undefined (legacy reasons)\r
    // Default to DWORD access size as the access\r
    // size field was introduced at a later date\r
    // and some ConfigurationManager implementations\r
    // may not be providing this field data\r
    AcpiSpcr.BaseAddress.AccessSize = EFI_ACPI_6_3_DWORD;\r
  } else {\r
    AcpiSpcr.BaseAddress.AccessSize = SerialPortInfo->AccessSize;\r
  }\r
\r
  // Update the UART interrupt\r
  AcpiSpcr.GlobalSystemInterrupt = SerialPortInfo->Interrupt;\r
\r
  switch (SerialPortInfo->BaudRate) {\r
    case 9600:\r
      AcpiSpcr.BaudRate =\r
        EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_BAUD_RATE_9600;\r
      break;\r
    case 19200:\r
      AcpiSpcr.BaudRate =\r
        EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_BAUD_RATE_19200;\r
      break;\r
    case 57600:\r
      AcpiSpcr.BaudRate =\r
        EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_BAUD_RATE_57600;\r
      break;\r
    case 115200:\r
      AcpiSpcr.BaudRate =\r
        EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_BAUD_RATE_115200;\r
      break;\r
    default:\r
      Status = EFI_UNSUPPORTED;\r
      DEBUG ((\r
        DEBUG_ERROR,\r
        "ERROR: SPCR: Invalid Baud Rate %ld, Status = %r\n",\r
        SerialPortInfo->BaudRate,\r
        Status\r
        ));\r
      goto error_handler;\r
  } // switch\r
\r
  TableList[0] = (EFI_ACPI_DESCRIPTION_HEADER *)&AcpiSpcr;\r
\r
  // Build a SSDT table describing the serial port.\r
  Status = BuildSsdtSerialPortTable (\r
             AcpiTableInfo,\r
             SerialPortInfo,\r
             NAME_STR_SPCR_PORT,\r
             UID_SPCR_PORT,\r
             &TableList[1]\r
             );\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((\r
      DEBUG_ERROR,\r
      "ERROR: SPCR: Failed to build associated SSDT table. Status = %r\n",\r
      Status\r
      ));\r
    goto error_handler;\r
  }\r
\r
  *TableCount = 2;\r
  *Table      = TableList;\r
\r
  return Status;\r
\r
error_handler:\r
  if (TableList != NULL) {\r
    FreePool (TableList);\r
  }\r
\r
  return Status;\r
}\r
\r
/** This macro defines the SPCR Table Generator revision.\r
*/\r
#define SPCR_GENERATOR_REVISION  CREATE_REVISION (1, 0)\r
\r
/** The interface for the SPCR Table Generator.\r
*/\r
STATIC\r
CONST\r
ACPI_TABLE_GENERATOR  SpcrGenerator = {\r
  // Generator ID\r
  CREATE_STD_ACPI_TABLE_GEN_ID (EStdAcpiTableIdSpcr),\r
  // Generator Description\r
  L"ACPI.STD.SPCR.GENERATOR",\r
  // ACPI Table Signature\r
  EFI_ACPI_6_3_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_SIGNATURE,\r
  // ACPI Table Revision supported by this Generator\r
  EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_REVISION,\r
  // Minimum supported ACPI Table Revision\r
  EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_REVISION,\r
  // Creator ID\r
  TABLE_GENERATOR_CREATOR_ID_ARM,\r
  // Creator Revision\r
  SPCR_GENERATOR_REVISION,\r
  // Build table function. Use the extended version instead.\r
  NULL,\r
  // Free table function. Use the extended version instead.\r
  NULL,\r
  // Extended Build table function.\r
  BuildSpcrTableEx,\r
  // Extended free function.\r
  FreeSpcrTableEx\r
};\r
\r
/** Register the Generator with the ACPI Table Factory.\r
\r
  @param [in]  ImageHandle  The handle to the image.\r
  @param [in]  SystemTable  Pointer to the System Table.\r
\r
  @retval EFI_SUCCESS           The Generator is registered.\r
  @retval EFI_INVALID_PARAMETER A parameter is invalid.\r
  @retval EFI_ALREADY_STARTED   The Generator for the Table ID\r
                                is already registered.\r
**/\r
EFI_STATUS\r
EFIAPI\r
AcpiSpcrLibConstructor (\r
  IN  EFI_HANDLE        ImageHandle,\r
  IN  EFI_SYSTEM_TABLE  *SystemTable\r
  )\r
{\r
  EFI_STATUS  Status;\r
\r
  Status = RegisterAcpiTableGenerator (&SpcrGenerator);\r
  DEBUG ((DEBUG_INFO, "SPCR: Register Generator. Status = %r\n", Status));\r
  ASSERT_EFI_ERROR (Status);\r
  return Status;\r
}\r
\r
/** Deregister the Generator from the ACPI Table Factory.\r
\r
  @param [in]  ImageHandle  The handle to the image.\r
  @param [in]  SystemTable  Pointer to the System Table.\r
\r
  @retval EFI_SUCCESS           The Generator is deregistered.\r
  @retval EFI_INVALID_PARAMETER A parameter is invalid.\r
  @retval EFI_NOT_FOUND         The Generator is not registered.\r
**/\r
EFI_STATUS\r
EFIAPI\r
AcpiSpcrLibDestructor (\r
  IN  EFI_HANDLE        ImageHandle,\r
  IN  EFI_SYSTEM_TABLE  *SystemTable\r
  )\r
{\r
  EFI_STATUS  Status;\r
\r
  Status = DeregisterAcpiTableGenerator (&SpcrGenerator);\r
  DEBUG ((DEBUG_INFO, "SPCR: Deregister Generator. Status = %r\n", Status));\r
  ASSERT_EFI_ERROR (Status);\r
  return Status;\r
}\r