/** @file
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* Generic Timer Description Table (GTDT)
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*
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* Copyrignt (c) 2020, Linaro Limited. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/AcpiLib.h>
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#include <Library/PcdLib.h>
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#include <IndustryStandard/Acpi.h>
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#include <IndustryStandard/SbsaQemuAcpi.h>
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#define GTDT_GLOBAL_FLAGS_MAPPED EFI_ACPI_5_0_GTDT_GLOBAL_FLAG_MEMORY_MAPPED_BLOCK_PRESENT
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#define GTDT_GLOBAL_FLAGS_NOT_MAPPED 0
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#define GTDT_GLOBAL_FLAGS_EDGE EFI_ACPI_5_0_GTDT_GLOBAL_FLAG_INTERRUPT_MODE
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#define GTDT_GLOBAL_FLAGS_LEVEL 0
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// Note: We could have a build flag that switches between memory mapped/non-memory mapped timer
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#ifdef SYSTEM_TIMER_BASE_ADDRESS
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#define GTDT_GLOBAL_FLAGS (GTDT_GLOBAL_FLAGS_MAPPED | GTDT_GLOBAL_FLAGS_LEVEL)
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#else
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#define GTDT_GLOBAL_FLAGS (GTDT_GLOBAL_FLAGS_NOT_MAPPED | GTDT_GLOBAL_FLAGS_LEVEL)
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#define SYSTEM_TIMER_BASE_ADDRESS 0xFFFFFFFFFFFFFFFF
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#endif
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#define GTDT_TIMER_EDGE_TRIGGERED EFI_ACPI_6_3_GTDT_TIMER_FLAG_TIMER_INTERRUPT_MODE
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#define GTDT_TIMER_LEVEL_TRIGGERED 0
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#define GTDT_TIMER_ACTIVE_LOW EFI_ACPI_6_3_GTDT_TIMER_FLAG_TIMER_INTERRUPT_POLARITY
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#define GTDT_TIMER_ACTIVE_HIGH 0
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#define GTDT_GTIMER_FLAGS (GTDT_TIMER_ACTIVE_LOW | GTDT_TIMER_LEVEL_TRIGGERED)
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#define SBSA_PLATFORM_WATCHDOG_COUNT 1
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#define SBSA_PLATFORM_TIMER_COUNT (SBSA_PLATFORM_WATCHDOG_COUNT)
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#define SBSAQEMU_WDT_REFRESH_FRAME_BASE 0x50010000
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#define SBSAQEMU_WDT_CONTROL_FRAME_BASE 0x50011000
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#define SBSAQEMU_WDT_IRQ 48
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#define GTDT_WDTIMER_EDGE_TRIGGERED EFI_ACPI_6_3_GTDT_SBSA_GENERIC_WATCHDOG_FLAG_TIMER_INTERRUPT_MODE
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#define GTDT_WDTIMER_LEVEL_TRIGGERED 0
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#define GTDT_WDTIMER_ACTIVE_LOW EFI_ACPI_6_3_GTDT_SBSA_GENERIC_WATCHDOG_FLAG_TIMER_INTERRUPT_POLARITY
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#define GTDT_WDTIMER_ACTIVE_HIGH 0
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#define GTDT_WDTIMER_FLAGS (GTDT_WDTIMER_ACTIVE_HIGH | GTDT_WDTIMER_LEVEL_TRIGGERED)
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#define EFI_ACPI_6_3_SBSA_GENERIC_WATCHDOG_STRUCTURE_INIT( \
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RefreshFramePhysicalAddress, ControlFramePhysicalAddress, \
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WatchdogTimerGSIV, WatchdogTimerFlags) \
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{ \
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EFI_ACPI_6_3_GTDT_SBSA_GENERIC_WATCHDOG, \
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sizeof(EFI_ACPI_6_3_GTDT_SBSA_GENERIC_WATCHDOG_STRUCTURE), \
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EFI_ACPI_RESERVED_WORD, \
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RefreshFramePhysicalAddress, \
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ControlFramePhysicalAddress, \
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WatchdogTimerGSIV, \
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WatchdogTimerFlags \
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}
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#pragma pack (1)
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typedef struct {
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EFI_ACPI_6_3_GENERIC_TIMER_DESCRIPTION_TABLE Gtdt;
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EFI_ACPI_6_3_GTDT_SBSA_GENERIC_WATCHDOG_STRUCTURE Gwdt;
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} GENERIC_TIMER_DESCRIPTION_TABLES;
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#pragma pack ()
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GENERIC_TIMER_DESCRIPTION_TABLES Gtdt = {
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{
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SBSAQEMU_ACPI_HEADER(
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EFI_ACPI_6_3_GENERIC_TIMER_DESCRIPTION_TABLE_SIGNATURE,
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GENERIC_TIMER_DESCRIPTION_TABLES,
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EFI_ACPI_6_3_GENERIC_TIMER_DESCRIPTION_TABLE_REVISION
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),
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SYSTEM_TIMER_BASE_ADDRESS, // UINT64 PhysicalAddress
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0, // UINT32 Reserved
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FixedPcdGet32 (PcdArmArchTimerSecIntrNum), // UINT32 SecurePL1TimerGSIV
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GTDT_GTIMER_FLAGS, // UINT32 SecurePL1TimerFlags
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FixedPcdGet32 (PcdArmArchTimerIntrNum), // UINT32 NonSecurePL1TimerGSIV
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GTDT_GTIMER_FLAGS, // UINT32 NonSecurePL1TimerFlags
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FixedPcdGet32 (PcdArmArchTimerVirtIntrNum), // UINT32 VirtualTimerGSIV
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GTDT_GTIMER_FLAGS, // UINT32 VirtualTimerFlags
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FixedPcdGet32 (PcdArmArchTimerHypIntrNum), // UINT32 NonSecurePL2TimerGSIV
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GTDT_GTIMER_FLAGS, // UINT32 NonSecurePL2TimerFlags
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0xFFFFFFFFFFFFFFFF, // UINT64 CntReadBasePhysicalAddress
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SBSA_PLATFORM_TIMER_COUNT, // UINT32 PlatformTimerCount
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sizeof(EFI_ACPI_6_3_GENERIC_TIMER_DESCRIPTION_TABLE),
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// UINT32 PlatformTimerOffset
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0, // UINT32 VirtualPL2TimerGSIV
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0 // UINT32 VirtualPL2TimerFlags
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},
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EFI_ACPI_6_3_SBSA_GENERIC_WATCHDOG_STRUCTURE_INIT(
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SBSAQEMU_WDT_REFRESH_FRAME_BASE,
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SBSAQEMU_WDT_CONTROL_FRAME_BASE,
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SBSAQEMU_WDT_IRQ,
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GTDT_WDTIMER_FLAGS
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)
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};
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// Reference the table being generated to prevent the optimizer from removing the
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// data structure from the executable
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VOID* CONST ReferenceAcpiTable = &Gtdt;
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