diff options
Diffstat (limited to 'ArmRealViewEbPkg/InterruptDxe/InterruptDxe.c')
| -rwxr-xr-x | ArmRealViewEbPkg/InterruptDxe/InterruptDxe.c | 484 |
1 files changed, 484 insertions, 0 deletions
diff --git a/ArmRealViewEbPkg/InterruptDxe/InterruptDxe.c b/ArmRealViewEbPkg/InterruptDxe/InterruptDxe.c new file mode 100755 index 0000000000..b9e8256f82 --- /dev/null +++ b/ArmRealViewEbPkg/InterruptDxe/InterruptDxe.c @@ -0,0 +1,484 @@ +/*++
+
+Copyright (c) 2009, Hewlett-Packard Company. All rights reserved.<BR>
+Portions copyright (c) 2010, Apple Inc. All rights reserved.<BR>
+This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution. The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+Module Name:
+
+ Gic.c
+
+Abstract:
+
+ Driver implementing the GIC interrupt controller protocol
+
+--*/
+
+#include <PiDxe.h>
+
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiLib.h>
+#include <Library/PcdLib.h>
+#include <Library/IoLib.h>
+
+#include <Protocol/Cpu.h>
+#include <Protocol/HardwareInterrupt.h>
+
+
+//
+// EB board definitions
+//
+#define EB_GIC1_CPU_INTF_BASE 0x10040000
+#define EB_GIC1_DIST_BASE 0x10041000
+#define EB_GIC2_CPU_INTF_BASE 0x10050000
+#define EB_GIC2_DIST_BASE 0x10051000
+#define EB_GIC3_CPU_INTF_BASE 0x10060000
+#define EB_GIC3_DIST_BASE 0x10061000
+#define EB_GIC4_CPU_INTF_BASE 0x10070000
+#define EB_GIC5_DIST_BASE 0x10071000
+
+// number of interrupts sources supported by each GIC on the EB
+#define EB_NUM_GIC_INTERRUPTS 96
+
+// number of 32-bit registers needed to represent those interrupts as a bit
+// (used for enable set, enable clear, pending set, pending clear, and active regs)
+#define EB_NUM_GIC_REG_PER_INT_BITS (EB_NUM_GIC_INTERRUPTS / 32)
+
+// number of 32-bit registers needed to represent those interrupts as two bits
+// (used for configuration reg)
+#define EB_NUM_GIC_REG_PER_INT_CFG (EB_NUM_GIC_INTERRUPTS / 16)
+
+// number of 32-bit registers needed to represent interrupts as 8-bit priority field
+// (used for priority regs)
+#define EB_NUM_GIC_REG_PER_INT_BYTES (EB_NUM_GIC_INTERRUPTS / 4)
+
+#define GIC_DEFAULT_PRIORITY 0x80
+
+//
+// GIC definitions
+//
+
+// Distributor
+#define GIC_ICDDCR 0x000 // Distributor Control Register
+#define GIC_ICDICTR 0x004 // Interrupt Controller Type Register
+#define GIC_ICDIIDR 0x008 // Implementer Identification Register
+
+// each reg base below repeats for EB_NUM_GIC_REG_PER_INT_BITS (see GIC spec)
+#define GIC_ICDISR 0x080 // Interrupt Security Registers
+#define GIC_ICDISER 0x100 // Interrupt Set-Enable Registers
+#define GIC_ICDICER 0x180 // Interrupt Clear-Enable Registers
+#define GIC_ICDSPR 0x200 // Interrupt Set-Pending Registers
+#define GIC_ICDCPR 0x280 // Interrupt Clear-Pending Registers
+#define GIC_ICDABR 0x300 // Active Bit Registers
+
+// each reg base below repeats for EB_NUM_GIC_REG_PER_INT_BYTES
+#define GIC_ICDIPR 0x400 // Interrupt Priority Registers
+
+// each reg base below repeats for EB_NUM_GIC_INTERRUPTS
+#define GIC_ICDIPTR 0x800 // Interrupt Processor Target Registers
+#define GIC_ICDICFR 0xC00 // Interrupt Configuration Registers
+
+// just one of these
+#define GIC_ICDSGIR 0xF00 // Software Generated Interrupt Register
+
+
+// Cpu interface
+#define GIC_ICCICR 0x00 // CPU Interface Controler Register
+#define GIC_ICCPMR 0x04 // Interrupt Priority Mask Register
+#define GIC_ICCBPR 0x08 // Binary Point Register
+#define GIC_ICCIAR 0x0C // Interrupt Acknowledge Register
+#define GIC_ICCEIOR 0x10 // End Of Interrupt Register
+#define GIC_ICCRPR 0x14 // Running Priority Register
+#define GIC_ICCPIR 0x18 // Highest Pending Interrupt Register
+#define GIC_ICCABPR 0x1C // Aliased Binary Point Register
+#define GIC_ICCIDR 0xFC // Identification Register
+
+extern EFI_HARDWARE_INTERRUPT_PROTOCOL gHardwareInterruptProtocol;
+
+//
+// Notifications
+//
+VOID *CpuProtocolNotificationToken = NULL;
+EFI_EVENT CpuProtocolNotificationEvent = (EFI_EVENT)NULL;
+EFI_EVENT EfiExitBootServicesEvent = (EFI_EVENT)NULL;
+
+
+HARDWARE_INTERRUPT_HANDLER gRegisteredInterruptHandlers[EB_NUM_GIC_INTERRUPTS];
+
+/**
+ Register Handler for the specified interrupt source.
+
+ @param This Instance pointer for this protocol
+ @param Source Hardware source of the interrupt
+ @param Handler Callback for interrupt. NULL to unregister
+
+ @retval EFI_SUCCESS Source was updated to support Handler.
+ @retval EFI_DEVICE_ERROR Hardware could not be programmed.
+
+**/
+EFI_STATUS
+EFIAPI
+RegisterInterruptSource (
+ IN EFI_HARDWARE_INTERRUPT_PROTOCOL *This,
+ IN HARDWARE_INTERRUPT_SOURCE Source,
+ IN HARDWARE_INTERRUPT_HANDLER Handler
+ )
+{
+ if (Source > EB_NUM_GIC_INTERRUPTS) {
+ ASSERT(FALSE);
+ return EFI_UNSUPPORTED;
+ }
+
+ if ((Handler == NULL) && (gRegisteredInterruptHandlers[Source] == NULL)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if ((Handler != NULL) && (gRegisteredInterruptHandlers[Source] != NULL)) {
+ return EFI_ALREADY_STARTED;
+ }
+
+ gRegisteredInterruptHandlers[Source] = Handler;
+ return This->EnableInterruptSource(This, Source);
+}
+
+
+/**
+ Enable interrupt source Source.
+
+ @param This Instance pointer for this protocol
+ @param Source Hardware source of the interrupt
+
+ @retval EFI_SUCCESS Source interrupt enabled.
+ @retval EFI_DEVICE_ERROR Hardware could not be programmed.
+
+**/
+EFI_STATUS
+EFIAPI
+EnableInterruptSource (
+ IN EFI_HARDWARE_INTERRUPT_PROTOCOL *This,
+ IN HARDWARE_INTERRUPT_SOURCE Source
+ )
+{
+ UINT32 RegOffset;
+ UINTN RegShift;
+
+ if (Source > EB_NUM_GIC_INTERRUPTS) {
+ ASSERT(FALSE);
+ return EFI_UNSUPPORTED;
+ }
+
+ // calculate enable register offset and bit position
+ RegOffset = Source / 32;
+ RegShift = Source % 32;
+
+ // write set-enable register
+ MmioWrite32 (EB_GIC1_DIST_BASE+GIC_ICDISER+(4*RegOffset), 1 << RegShift);
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Disable interrupt source Source.
+
+ @param This Instance pointer for this protocol
+ @param Source Hardware source of the interrupt
+
+ @retval EFI_SUCCESS Source interrupt disabled.
+ @retval EFI_DEVICE_ERROR Hardware could not be programmed.
+
+**/
+EFI_STATUS
+EFIAPI
+DisableInterruptSource (
+ IN EFI_HARDWARE_INTERRUPT_PROTOCOL *This,
+ IN HARDWARE_INTERRUPT_SOURCE Source
+ )
+{
+ UINT32 RegOffset;
+ UINTN RegShift;
+
+ if (Source > EB_NUM_GIC_INTERRUPTS) {
+ ASSERT(FALSE);
+ return EFI_UNSUPPORTED;
+ }
+
+ // calculate enable register offset and bit position
+ RegOffset = Source / 32;
+ RegShift = Source % 32;
+
+ // write set-enable register
+ MmioWrite32 (EB_GIC1_DIST_BASE+GIC_ICDICER+(4*RegOffset), 1 << RegShift);
+
+ return EFI_SUCCESS;
+}
+
+
+
+/**
+ Return current state of interrupt source Source.
+
+ @param This Instance pointer for this protocol
+ @param Source Hardware source of the interrupt
+ @param InterruptState TRUE: source enabled, FALSE: source disabled.
+
+ @retval EFI_SUCCESS InterruptState is valid
+ @retval EFI_DEVICE_ERROR InterruptState is not valid
+
+**/
+EFI_STATUS
+EFIAPI
+GetInterruptSourceState (
+ IN EFI_HARDWARE_INTERRUPT_PROTOCOL *This,
+ IN HARDWARE_INTERRUPT_SOURCE Source,
+ IN BOOLEAN *InterruptState
+ )
+{
+ UINT32 RegOffset;
+ UINTN RegShift;
+
+ if (Source > EB_NUM_GIC_INTERRUPTS) {
+ ASSERT(FALSE);
+ return EFI_UNSUPPORTED;
+ }
+
+ // calculate enable register offset and bit position
+ RegOffset = Source / 32;
+ RegShift = Source % 32;
+
+ if ((MmioRead32 (EB_GIC1_DIST_BASE+GIC_ICDISER+(4*RegOffset)) & (1<<RegShift)) == 0) {
+ *InterruptState = FALSE;
+ } else {
+ *InterruptState = TRUE;
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Signal to the hardware that the End Of Intrrupt state
+ has been reached.
+
+ @param This Instance pointer for this protocol
+ @param Source Hardware source of the interrupt
+
+ @retval EFI_SUCCESS Source interrupt EOI'ed.
+ @retval EFI_DEVICE_ERROR Hardware could not be programmed.
+
+**/
+EFI_STATUS
+EFIAPI
+EndOfInterrupt (
+ IN EFI_HARDWARE_INTERRUPT_PROTOCOL *This,
+ IN HARDWARE_INTERRUPT_SOURCE Source
+ )
+{
+ if (Source > EB_NUM_GIC_INTERRUPTS) {
+ ASSERT(FALSE);
+ return EFI_UNSUPPORTED;
+ }
+
+ MmioWrite32 (EB_GIC1_CPU_INTF_BASE+GIC_ICCEIOR, Source);
+ return EFI_SUCCESS;
+}
+
+
+/**
+ EFI_CPU_INTERRUPT_HANDLER that is called when a processor interrupt occurs.
+
+ @param InterruptType Defines the type of interrupt or exception that
+ occurred on the processor.This parameter is processor architecture specific.
+ @param SystemContext A pointer to the processor context when
+ the interrupt occurred on the processor.
+
+ @return None
+
+**/
+VOID
+EFIAPI
+IrqInterruptHandler (
+ IN EFI_EXCEPTION_TYPE InterruptType,
+ IN EFI_SYSTEM_CONTEXT SystemContext
+ )
+{
+ UINT32 GicInterrupt;
+ HARDWARE_INTERRUPT_HANDLER InterruptHandler;
+
+ GicInterrupt = MmioRead32 (EB_GIC1_CPU_INTF_BASE + GIC_ICCIAR);
+ if (GicInterrupt >= EB_NUM_GIC_INTERRUPTS) {
+ MmioWrite32 (EB_GIC1_CPU_INTF_BASE+GIC_ICCEIOR, GicInterrupt);
+ }
+
+ InterruptHandler = gRegisteredInterruptHandlers[GicInterrupt];
+ if (InterruptHandler != NULL) {
+ // Call the registered interrupt handler.
+ InterruptHandler (GicInterrupt, SystemContext);
+ } else {
+ DEBUG ((EFI_D_ERROR, "Spurious GIC interrupt: %x\n", GicInterrupt));
+ }
+
+ EndOfInterrupt (&gHardwareInterruptProtocol, GicInterrupt);
+}
+
+
+//
+// Making this global saves a few bytes in image size
+//
+EFI_HANDLE gHardwareInterruptHandle = NULL;
+
+//
+// The protocol instance produced by this driver
+//
+EFI_HARDWARE_INTERRUPT_PROTOCOL gHardwareInterruptProtocol = {
+ RegisterInterruptSource,
+ EnableInterruptSource,
+ DisableInterruptSource,
+ GetInterruptSourceState,
+ EndOfInterrupt
+};
+
+
+/**
+ Shutdown our hardware
+
+ DXE Core will disable interrupts and turn off the timer and disable interrupts
+ after all the event handlers have run.
+
+ @param[in] Event The Event that is being processed
+ @param[in] Context Event Context
+**/
+VOID
+EFIAPI
+ExitBootServicesEvent (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ UINTN i;
+
+ for (i = 0; i < EB_NUM_GIC_INTERRUPTS; i++) {
+ DisableInterruptSource (&gHardwareInterruptProtocol, i);
+ }
+}
+
+
+//
+// Notification routines
+//
+VOID
+CpuProtocolInstalledNotification (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ EFI_STATUS Status;
+ EFI_CPU_ARCH_PROTOCOL *Cpu;
+
+ //
+ // Get the cpu protocol that this driver requires.
+ //
+ Status = gBS->LocateProtocol(&gEfiCpuArchProtocolGuid, NULL, (VOID **)&Cpu);
+ ASSERT_EFI_ERROR(Status);
+
+ //
+ // Unregister the default exception handler.
+ //
+ Status = Cpu->RegisterInterruptHandler(Cpu, EXCEPT_ARM_IRQ, NULL);
+ ASSERT_EFI_ERROR(Status);
+
+ //
+ // Register to receive interrupts
+ //
+ Status = Cpu->RegisterInterruptHandler(Cpu, EXCEPT_ARM_IRQ, IrqInterruptHandler);
+ ASSERT_EFI_ERROR(Status);
+}
+
+/**
+ Initialize the state information for the CPU Architectural Protocol
+
+ @param ImageHandle of the loaded driver
+ @param SystemTable Pointer to the System Table
+
+ @retval EFI_SUCCESS Protocol registered
+ @retval EFI_OUT_OF_RESOURCES Cannot allocate protocol data structure
+ @retval EFI_DEVICE_ERROR Hardware problems
+
+**/
+EFI_STATUS
+InterruptDxeInitialize (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+ UINTN i;
+ UINT32 RegOffset;
+ UINTN RegShift;
+
+
+ // Make sure the Interrupt Controller Protocol is not already installed in the system.
+ ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gHardwareInterruptProtocolGuid);
+
+ for (i = 0; i < EB_NUM_GIC_INTERRUPTS; i++) {
+ DisableInterruptSource (&gHardwareInterruptProtocol, i);
+
+ // Set Priority
+ RegOffset = i / 4;
+ RegShift = (i % 4) * 8;
+ MmioAndThenOr32 (
+ EB_GIC1_DIST_BASE+GIC_ICDIPR+(4*RegOffset),
+ ~(0xff << RegShift),
+ GIC_DEFAULT_PRIORITY << RegShift
+ );
+ }
+
+ // configure interrupts for cpu 0
+ for (i = 0; i < EB_NUM_GIC_REG_PER_INT_BYTES; i++) {
+ MmioWrite32 (EB_GIC1_DIST_BASE + GIC_ICDIPTR + (i*4), 0x01010101);
+ }
+
+ // set binary point reg to 0x7 (no preemption)
+ MmioWrite32 (EB_GIC1_CPU_INTF_BASE + GIC_ICCBPR, 0x7);
+
+ // set priority mask reg to 0xff to allow all priorities through
+ MmioWrite32 (EB_GIC1_CPU_INTF_BASE + GIC_ICCPMR, 0xff);
+
+ // enable gic cpu interface
+ MmioWrite32 (EB_GIC1_CPU_INTF_BASE + GIC_ICCICR, 0x1);
+
+ // enable gic distributor
+ MmioWrite32 (EB_GIC1_DIST_BASE + GIC_ICCICR, 0x1);
+
+
+ ZeroMem (&gRegisteredInterruptHandlers, sizeof (gRegisteredInterruptHandlers));
+
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ &gHardwareInterruptHandle,
+ &gHardwareInterruptProtocolGuid, &gHardwareInterruptProtocol,
+ NULL
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ // Set up to be notified when the Cpu protocol is installed.
+ Status = gBS->CreateEvent (EVT_NOTIFY_SIGNAL, TPL_CALLBACK, CpuProtocolInstalledNotification, NULL, &CpuProtocolNotificationEvent);
+ ASSERT_EFI_ERROR (Status);
+
+ Status = gBS->RegisterProtocolNotify (&gEfiCpuArchProtocolGuid, CpuProtocolNotificationEvent, (VOID *)&CpuProtocolNotificationToken);
+ ASSERT_EFI_ERROR (Status);
+
+ // Register for an ExitBootServicesEvent
+ Status = gBS->CreateEvent (EVT_SIGNAL_EXIT_BOOT_SERVICES, TPL_NOTIFY, ExitBootServicesEvent, NULL, &EfiExitBootServicesEvent);
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
+
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