1/** @file 2* Generic Timer Description Table (GTDT) 3* 4* Copyright (c) 2012 - 2016, ARM Limited. All rights reserved. 5* 6* This program and the accompanying materials 7* are licensed and made available under the terms and conditions of the BSD License 8* which accompanies this distribution. The full text of the license may be found at 9* http://opensource.org/licenses/bsd-license.php 10* 11* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 12* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 13* 14**/ 15 16#include "ArmPlatform.h" 17#include <Library/AcpiLib.h> 18#include <Library/PcdLib.h> 19#include <IndustryStandard/Acpi.h> 20 21#define GTDT_GLOBAL_FLAGS_MAPPED EFI_ACPI_5_0_GTDT_GLOBAL_FLAG_MEMORY_MAPPED_BLOCK_PRESENT 22#define GTDT_GLOBAL_FLAGS_NOT_MAPPED 0 23#define GTDT_GLOBAL_FLAGS_EDGE EFI_ACPI_5_0_GTDT_GLOBAL_FLAG_INTERRUPT_MODE 24#define GTDT_GLOBAL_FLAGS_LEVEL 0 25 26// Note: We could have a build flag that switches between memory mapped/non-memory mapped timer 27#ifdef SYSTEM_TIMER_BASE_ADDRESS 28 #define GTDT_GLOBAL_FLAGS (GTDT_GLOBAL_FLAGS_MAPPED | GTDT_GLOBAL_FLAGS_LEVEL) 29#else 30 #define GTDT_GLOBAL_FLAGS (GTDT_GLOBAL_FLAGS_NOT_MAPPED | GTDT_GLOBAL_FLAGS_LEVEL) 31 #define SYSTEM_TIMER_BASE_ADDRESS 0xFFFFFFFFFFFFFFFF 32#endif 33 34#define GTDT_TIMER_EDGE_TRIGGERED EFI_ACPI_5_0_GTDT_TIMER_FLAG_TIMER_INTERRUPT_MODE 35#define GTDT_TIMER_LEVEL_TRIGGERED 0 36#define GTDT_TIMER_ACTIVE_LOW EFI_ACPI_5_0_GTDT_TIMER_FLAG_TIMER_INTERRUPT_POLARITY 37#define GTDT_TIMER_ACTIVE_HIGH 0 38 39#define GTDT_GTIMER_FLAGS (GTDT_TIMER_ACTIVE_LOW | GTDT_TIMER_LEVEL_TRIGGERED) 40 41#ifdef ARM_JUNO_ACPI_5_0 42 EFI_ACPI_5_0_GENERIC_TIMER_DESCRIPTION_TABLE Gtdt = { 43 ARM_ACPI_HEADER( 44 EFI_ACPI_5_0_GENERIC_TIMER_DESCRIPTION_TABLE_SIGNATURE, 45 EFI_ACPI_5_0_GENERIC_TIMER_DESCRIPTION_TABLE, 46 EFI_ACPI_5_0_GENERIC_TIMER_DESCRIPTION_TABLE_REVISION 47 ), 48 SYSTEM_TIMER_BASE_ADDRESS, // UINT64 PhysicalAddress 49 GTDT_GLOBAL_FLAGS, // UINT32 GlobalFlags 50 FixedPcdGet32 (PcdArmArchTimerSecIntrNum), // UINT32 SecurePL1TimerGSIV 51 GTDT_GTIMER_FLAGS, // UINT32 SecurePL1TimerFlags 52 FixedPcdGet32 (PcdArmArchTimerIntrNum), // UINT32 NonSecurePL1TimerGSIV 53 GTDT_GTIMER_FLAGS, // UINT32 NonSecurePL1TimerFlags 54 FixedPcdGet32 (PcdArmArchTimerVirtIntrNum), // UINT32 VirtualTimerGSIV 55 GTDT_GTIMER_FLAGS, // UINT32 VirtualTimerFlags 56 FixedPcdGet32 (PcdArmArchTimerHypIntrNum), // UINT32 NonSecurePL2TimerGSIV 57 GTDT_GTIMER_FLAGS // UINT32 NonSecurePL2TimerFlags 58 }; 59#else 60 #pragma pack (1) 61 62 typedef struct { 63 EFI_ACPI_5_1_GENERIC_TIMER_DESCRIPTION_TABLE Gtdt; 64#if (JUNO_WATCHDOG_COUNT != 0) 65 EFI_ACPI_5_1_GTDT_SBSA_GENERIC_WATCHDOG_STRUCTURE Watchdogs[JUNO_WATCHDOG_COUNT]; 66#endif 67 } GENERIC_TIMER_DESCRIPTION_TABLE; 68 69 #pragma pack () 70 71 GENERIC_TIMER_DESCRIPTION_TABLE Gtdt = { 72 { 73 ARM_ACPI_HEADER( 74 EFI_ACPI_5_1_GENERIC_TIMER_DESCRIPTION_TABLE_SIGNATURE, 75 GENERIC_TIMER_DESCRIPTION_TABLE, 76 EFI_ACPI_5_1_GENERIC_TIMER_DESCRIPTION_TABLE_REVISION 77 ), 78 SYSTEM_TIMER_BASE_ADDRESS, // UINT64 PhysicalAddress 79 0, // UINT32 Reserved 80 FixedPcdGet32 (PcdArmArchTimerSecIntrNum), // UINT32 SecurePL1TimerGSIV 81 GTDT_GTIMER_FLAGS, // UINT32 SecurePL1TimerFlags 82 FixedPcdGet32 (PcdArmArchTimerIntrNum), // UINT32 NonSecurePL1TimerGSIV 83 GTDT_GTIMER_FLAGS, // UINT32 NonSecurePL1TimerFlags 84 FixedPcdGet32 (PcdArmArchTimerVirtIntrNum), // UINT32 VirtualTimerGSIV 85 GTDT_GTIMER_FLAGS, // UINT32 VirtualTimerFlags 86 FixedPcdGet32 (PcdArmArchTimerHypIntrNum), // UINT32 NonSecurePL2TimerGSIV 87 GTDT_GTIMER_FLAGS, // UINT32 NonSecurePL2TimerFlags 88 0xFFFFFFFFFFFFFFFF, // UINT64 CntReadBasePhysicalAddress 89 JUNO_WATCHDOG_COUNT, // UINT32 PlatformTimerCount 90 sizeof (EFI_ACPI_5_1_GENERIC_TIMER_DESCRIPTION_TABLE) // UINT32 PlatfromTimerOffset 91 }, 92#if (JUNO_WATCHDOG_COUNT != 0) 93 { 94 EFI_ACPI_5_1_SBSA_GENERIC_WATCHDOG_STRUCTURE_INIT( 95 FixedPcdGet32 (PcdGenericWatchdogRefreshBase), FixedPcdGet32 (PcdGenericWatchdogControlBase), 93, 0), 96 EFI_ACPI_5_1_SBSA_GENERIC_WATCHDOG_STRUCTURE_INIT( 97 FixedPcdGet32 (PcdGenericWatchdogRefreshBase), FixedPcdGet32 (PcdGenericWatchdogControlBase), 94, EFI_ACPI_5_1_GTDT_SBSA_GENERIC_WATCHDOG_FLAG_SECURE_TIMER) 98 } 99#endif 100 }; 101#endif 102 103// 104// Reference the table being generated to prevent the optimizer from removing the 105// data structure from the executable 106// 107VOID* CONST ReferenceAcpiTable = &Gtdt; 108