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 // 107 VOID* CONST ReferenceAcpiTable = &Gtdt; 108
