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audk/DynamicTablesPkg/Library/Acpi/Arm/AcpiSpcrLibArm/SpcrGenerator.c

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/** @file
SPCR Table Generator
Copyright (c) 2017 - 2019, ARM Limited. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Reference(s):
- Microsoft Serial Port Console Redirection Table
Specification - Version 1.03 - August 10, 2015.
**/
#include <IndustryStandard/DebugPort2Table.h>
#include <IndustryStandard/SerialPortConsoleRedirectionTable.h>
#include <Library/AcpiLib.h>
#include <Library/DebugLib.h>
#include <Protocol/AcpiTable.h>
// Module specific include files.
#include <AcpiTableGenerator.h>
#include <ConfigurationManagerObject.h>
#include <ConfigurationManagerHelper.h>
#include <Library/TableHelperLib.h>
#include <Protocol/ConfigurationManagerProtocol.h>
/** ARM standard SPCR Table Generator
Constructs the SPCR table for PL011 or SBSA UART peripherals.
Requirements:
The following Configuration Manager Object(s) are required by
this Generator:
- EArmObjSerialConsolePortInfo
NOTE: This implementation ignores the possibility that the Serial settings may
be modified from the UEFI Shell. A more complex handler would be needed
to (e.g.) recover serial port settings from the UART, or non-volatile
storage.
*/
#pragma pack(1)
/** This macro defines the no flow control option.
*/
#define SPCR_FLOW_CONTROL_NONE 0
/**A template for generating the SPCR Table.
Note: fields marked "{Template}" will be updated dynamically.
*/
STATIC
EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE AcpiSpcr = {
ACPI_HEADER (
EFI_ACPI_6_2_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_SIGNATURE,
EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE,
EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_REVISION
),
0, // {Template}: Serial Port Subtype
{
EFI_ACPI_RESERVED_BYTE,
EFI_ACPI_RESERVED_BYTE,
EFI_ACPI_RESERVED_BYTE
},
ARM_GAS32 (0), // {Template}: Serial Port Base Address
EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_INTERRUPT_TYPE_GIC,
0, // Not used on ARM
0, // {Template}: Serial Port Interrupt
0, // {Template}: Serial Port Baudrate
EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_PARITY_NO_PARITY,
EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_STOP_BITS_1,
SPCR_FLOW_CONTROL_NONE,
EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_TERMINAL_TYPE_ANSI,
EFI_ACPI_RESERVED_BYTE,
0xFFFF,
0xFFFF,
0x00,
0x00,
0x00,
0x00000000,
0x00,
EFI_ACPI_RESERVED_DWORD
};
#pragma pack()
/** This macro expands to a function that retrieves the Serial
Port Information from the Configuration Manager.
*/
GET_OBJECT_LIST (
EObjNameSpaceArm,
EArmObjSerialConsolePortInfo,
CM_ARM_SERIAL_PORT_INFO
)
/** Construct the SPCR ACPI table.
This function invokes the Configuration Manager protocol interface
to get the required hardware information for generating the ACPI
table.
If this function allocates any resources then they must be freed
in the FreeXXXXTableResources function.
@param [in] This Pointer to the table generator.
@param [in] AcpiTableInfo Pointer to the ACPI Table Info.
@param [in] CfgMgrProtocol Pointer to the Configuration Manager
Protocol Interface.
@param [out] Table Pointer to the constructed ACPI Table.
@retval EFI_SUCCESS Table generated successfully.
@retval EFI_INVALID_PARAMETER A parameter is invalid.
@retval EFI_NOT_FOUND The required object was not found.
@retval EFI_UNSUPPORTED An unsupported baudrate was specified by the
Configuration Manager.
@retval EFI_BAD_BUFFER_SIZE The size returned by the Configuration
Manager is less than the Object size for the
requested object.
**/
STATIC
EFI_STATUS
EFIAPI
BuildSpcrTable (
IN CONST ACPI_TABLE_GENERATOR * CONST This,
IN CONST CM_STD_OBJ_ACPI_TABLE_INFO * CONST AcpiTableInfo,
IN CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL * CONST CfgMgrProtocol,
OUT EFI_ACPI_DESCRIPTION_HEADER ** CONST Table
)
{
EFI_STATUS Status;
CM_ARM_SERIAL_PORT_INFO * SerialPortInfo;
ASSERT (This != NULL);
ASSERT (AcpiTableInfo != NULL);
ASSERT (CfgMgrProtocol != NULL);
ASSERT (Table != NULL);
ASSERT (AcpiTableInfo->TableGeneratorId == This->GeneratorID);
ASSERT (AcpiTableInfo->AcpiTableSignature == This->AcpiTableSignature);
if ((AcpiTableInfo->AcpiTableRevision < This->MinAcpiTableRevision) ||
(AcpiTableInfo->AcpiTableRevision > This->AcpiTableRevision)) {
DEBUG ((
DEBUG_ERROR,
"ERROR: SPCR: Requested table revision = %d, is not supported."
"Supported table revision: Minimum = %d, Maximum = %d\n",
AcpiTableInfo->AcpiTableRevision,
This->MinAcpiTableRevision,
This->AcpiTableRevision
));
return EFI_INVALID_PARAMETER;
}
*Table = NULL;
Status = GetEArmObjSerialConsolePortInfo (
CfgMgrProtocol,
CM_NULL_TOKEN,
&SerialPortInfo,
NULL
);
if (EFI_ERROR (Status)) {
DEBUG ((
DEBUG_ERROR,
"ERROR: SPCR: Failed to get serial port information. Status = %r\n",
Status
));
goto error_handler;
}
if (SerialPortInfo->BaseAddress == 0) {
Status = EFI_INVALID_PARAMETER;
DEBUG ((
DEBUG_ERROR,
"ERROR: SPCR: Uart port base address is invalid. BaseAddress = 0x%lx\n",
SerialPortInfo->BaseAddress
));
goto error_handler;
}
if ((SerialPortInfo->PortSubtype !=
EFI_ACPI_DBG2_PORT_SUBTYPE_SERIAL_ARM_PL011_UART) &&
(SerialPortInfo->PortSubtype !=
EFI_ACPI_DBG2_PORT_SUBTYPE_SERIAL_ARM_SBSA_GENERIC_UART_2X) &&
(SerialPortInfo->PortSubtype !=
EFI_ACPI_DBG2_PORT_SUBTYPE_SERIAL_ARM_SBSA_GENERIC_UART) &&
(SerialPortInfo->PortSubtype !=
EFI_ACPI_DBG2_PORT_SUBTYPE_SERIAL_FULL_16550) &&
(SerialPortInfo->PortSubtype !=
EFI_ACPI_DBG2_PORT_SUBTYPE_SERIAL_DCC)) {
Status = EFI_INVALID_PARAMETER;
DEBUG ((
DEBUG_ERROR,
"ERROR: SPCR: Uart port sybtype is invalid. PortSubtype = 0x%x\n",
SerialPortInfo->PortSubtype
));
goto error_handler;
}
DEBUG ((DEBUG_INFO, "SPCR UART Configuration:\n"));
DEBUG ((DEBUG_INFO, " UART Base = 0x%lx\n", SerialPortInfo->BaseAddress));
DEBUG ((DEBUG_INFO, " Clock = %d\n", SerialPortInfo->Clock));
DEBUG ((DEBUG_INFO, " Baudrate = %ld\n", SerialPortInfo->BaudRate));
DEBUG ((DEBUG_INFO, " Interrupt = %d\n", SerialPortInfo->Interrupt));
Status = AddAcpiHeader (
CfgMgrProtocol,
This,
(EFI_ACPI_DESCRIPTION_HEADER*)&AcpiSpcr,
AcpiTableInfo,
sizeof (EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE)
);
if (EFI_ERROR (Status)) {
DEBUG ((
DEBUG_ERROR,
"ERROR: SPCR: Failed to add ACPI header. Status = %r\n",
Status
));
goto error_handler;
}
// Update the serial port subtype
AcpiSpcr.InterfaceType = SerialPortInfo->PortSubtype;
// Update the base address
AcpiSpcr.BaseAddress.Address = SerialPortInfo->BaseAddress;
// Update the UART interrupt
AcpiSpcr.GlobalSystemInterrupt = SerialPortInfo->Interrupt;
switch (SerialPortInfo->BaudRate) {
case 9600:
AcpiSpcr.BaudRate =
EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_BAUD_RATE_9600;
break;
case 19200:
AcpiSpcr.BaudRate =
EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_BAUD_RATE_19200;
break;
case 57600:
AcpiSpcr.BaudRate =
EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_BAUD_RATE_57600;
break;
case 115200:
AcpiSpcr.BaudRate =
EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_BAUD_RATE_115200;
break;
default:
Status = EFI_UNSUPPORTED;
DEBUG ((
DEBUG_ERROR,
"ERROR: SPCR: Invalid Baud Rate %ld, Status = %r\n",
SerialPortInfo->BaudRate,
Status
));
goto error_handler;
} // switch
*Table = (EFI_ACPI_DESCRIPTION_HEADER*)&AcpiSpcr;
error_handler:
return Status;
}
/** This macro defines the SPCR Table Generator revision.
*/
#define SPCR_GENERATOR_REVISION CREATE_REVISION (1, 0)
/** The interface for the SPCR Table Generator.
*/
STATIC
CONST
ACPI_TABLE_GENERATOR SpcrGenerator = {
// Generator ID
CREATE_STD_ACPI_TABLE_GEN_ID (EStdAcpiTableIdSpcr),
// Generator Description
L"ACPI.STD.SPCR.GENERATOR",
// ACPI Table Signature
EFI_ACPI_6_2_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_SIGNATURE,
// ACPI Table Revision supported by this Generator
EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_REVISION,
// Minimum supported ACPI Table Revision
EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_REVISION,
// Creator ID
TABLE_GENERATOR_CREATOR_ID_ARM,
// Creator Revision
SPCR_GENERATOR_REVISION,
// Build Table function
BuildSpcrTable,
// No additional resources are allocated by the generator.
// Hence the Free Resource function is not required.
NULL,
// Extended build function not needed
NULL,
// Extended build function not implemented by the generator.
// Hence extended free resource function is not required.
NULL
};
/** Register the Generator with the ACPI Table Factory.
@param [in] ImageHandle The handle to the image.
@param [in] SystemTable Pointer to the System Table.
@retval EFI_SUCCESS The Generator is registered.
@retval EFI_INVALID_PARAMETER A parameter is invalid.
@retval EFI_ALREADY_STARTED The Generator for the Table ID
is already registered.
**/
EFI_STATUS
EFIAPI
AcpiSpcrLibConstructor (
IN CONST EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE * CONST SystemTable
)
{
EFI_STATUS Status;
Status = RegisterAcpiTableGenerator (&SpcrGenerator);
DEBUG ((DEBUG_INFO, "SPCR: Register Generator. Status = %r\n", Status));
ASSERT_EFI_ERROR (Status);
return Status;
}
/** Deregister the Generator from the ACPI Table Factory.
@param [in] ImageHandle The handle to the image.
@param [in] SystemTable Pointer to the System Table.
@retval EFI_SUCCESS The Generator is deregistered.
@retval EFI_INVALID_PARAMETER A parameter is invalid.
@retval EFI_NOT_FOUND The Generator is not registered.
**/
EFI_STATUS
EFIAPI
AcpiSpcrLibDestructor (
IN CONST EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE * CONST SystemTable
)
{
EFI_STATUS Status;
Status = DeregisterAcpiTableGenerator (&SpcrGenerator);
DEBUG ((DEBUG_INFO, "SPCR: Deregister Generator. Status = %r\n", Status));
ASSERT_EFI_ERROR (Status);
return Status;
}
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