diff options
Diffstat (limited to 'ArmVirtPkg/Library')
| -rw-r--r-- | ArmVirtPkg/Library/ArmVirtPsciResetSystemPeiLib/ArmVirtPsciResetSystemPeiLib.c | 232 | ||||
| -rw-r--r-- | ArmVirtPkg/Library/ArmVirtPsciResetSystemPeiLib/ArmVirtPsciResetSystemPeiLib.inf | 39 |
2 files changed, 271 insertions, 0 deletions
diff --git a/ArmVirtPkg/Library/ArmVirtPsciResetSystemPeiLib/ArmVirtPsciResetSystemPeiLib.c b/ArmVirtPkg/Library/ArmVirtPsciResetSystemPeiLib/ArmVirtPsciResetSystemPeiLib.c new file mode 100644 index 0000000000..394a04e3c3 --- /dev/null +++ b/ArmVirtPkg/Library/ArmVirtPsciResetSystemPeiLib/ArmVirtPsciResetSystemPeiLib.c @@ -0,0 +1,232 @@ +/** @file
+ Reset System lib using PSCI hypervisor or secure monitor calls
+
+ Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+ Copyright (c) 2013, ARM Ltd. All rights reserved.<BR>
+ Copyright (c) 2014-2020, Linaro Ltd. All rights reserved.<BR>
+ Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <PiPei.h>
+
+#include <libfdt.h>
+#include <Library/ArmHvcLib.h>
+#include <Library/ArmSmcLib.h>
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/ResetSystemLib.h>
+
+#include <IndustryStandard/ArmStdSmc.h>
+
+typedef enum {
+ PsciMethodUnknown,
+ PsciMethodSmc,
+ PsciMethodHvc,
+} PSCI_METHOD;
+
+STATIC
+PSCI_METHOD
+DiscoverPsciMethod (
+ VOID
+ )
+{
+ VOID *DeviceTreeBase;
+ INT32 Node, Prev;
+ INT32 Len;
+ CONST CHAR8 *Compatible;
+ CONST CHAR8 *CompatibleItem;
+ CONST VOID *Prop;
+
+ DeviceTreeBase = (VOID*)(UINTN)PcdGet64 (PcdDeviceTreeInitialBaseAddress);
+ ASSERT (fdt_check_header (DeviceTreeBase) == 0);
+
+ //
+ // Enumerate all FDT nodes looking for the PSCI node and capture the method
+ //
+ for (Prev = 0;; Prev = Node) {
+ Node = fdt_next_node (DeviceTreeBase, Prev, NULL);
+ if (Node < 0) {
+ break;
+ }
+
+ Compatible = fdt_getprop (DeviceTreeBase, Node, "compatible", &Len);
+ if (Compatible == NULL) {
+ continue;
+ }
+
+ //
+ // Iterate over the NULL-separated items in the compatible string
+ //
+ for (CompatibleItem = Compatible; CompatibleItem < Compatible + Len;
+ CompatibleItem += 1 + AsciiStrLen (CompatibleItem)) {
+
+ if (AsciiStrCmp (CompatibleItem, "arm,psci-0.2") != 0) {
+ continue;
+ }
+
+ Prop = fdt_getprop (DeviceTreeBase, Node, "method", NULL);
+ if (!Prop) {
+ DEBUG ((DEBUG_ERROR, "%a: Missing PSCI method property\n",
+ __FUNCTION__));
+ return PsciMethodUnknown;
+ }
+
+ if (AsciiStrnCmp (Prop, "hvc", 3) == 0) {
+ return PsciMethodHvc;
+ } else if (AsciiStrnCmp (Prop, "smc", 3) == 0) {
+ return PsciMethodSmc;
+ } else {
+ DEBUG ((DEBUG_ERROR, "%a: Unknown PSCI method \"%a\"\n", __FUNCTION__,
+ Prop));
+ return PsciMethodUnknown;
+ }
+ }
+ }
+ return PsciMethodUnknown;
+}
+
+STATIC
+VOID
+PerformPsciAction (
+ IN UINTN Arg0
+ )
+{
+ ARM_SMC_ARGS ArmSmcArgs;
+ ARM_HVC_ARGS ArmHvcArgs;
+
+ ArmSmcArgs.Arg0 = Arg0;
+ ArmHvcArgs.Arg0 = Arg0;
+
+ switch (DiscoverPsciMethod ()) {
+ case PsciMethodHvc:
+ ArmCallHvc (&ArmHvcArgs);
+ break;
+
+ case PsciMethodSmc:
+ ArmCallSmc (&ArmSmcArgs);
+ break;
+
+ default:
+ DEBUG ((DEBUG_ERROR, "%a: no PSCI method defined\n", __FUNCTION__));
+ ASSERT (FALSE);
+ }
+}
+
+/**
+ This function causes a system-wide reset (cold reset), in which
+ all circuitry within the system returns to its initial state. This type of reset
+ is asynchronous to system operation and operates without regard to
+ cycle boundaries.
+
+ If this function returns, it means that the system does not support cold reset.
+**/
+VOID
+EFIAPI
+ResetCold (
+ VOID
+ )
+{
+ // Send a PSCI 0.2 SYSTEM_RESET command
+ PerformPsciAction (ARM_SMC_ID_PSCI_SYSTEM_RESET);
+}
+
+/**
+ This function causes a system-wide initialization (warm reset), in which all processors
+ are set to their initial state. Pending cycles are not corrupted.
+
+ If this function returns, it means that the system does not support warm reset.
+**/
+VOID
+EFIAPI
+ResetWarm (
+ VOID
+ )
+{
+ // Map a warm reset into a cold reset
+ ResetCold ();
+}
+
+/**
+ This function causes the system to enter a power state equivalent
+ to the ACPI G2/S5 or G3 states.
+
+ If this function returns, it means that the system does not support shutdown reset.
+**/
+VOID
+EFIAPI
+ResetShutdown (
+ VOID
+ )
+{
+ // Send a PSCI 0.2 SYSTEM_OFF command
+ PerformPsciAction (ARM_SMC_ID_PSCI_SYSTEM_OFF);
+}
+
+/**
+ This function causes a systemwide reset. The exact type of the reset is
+ defined by the EFI_GUID that follows the Null-terminated Unicode string passed
+ into ResetData. If the platform does not recognize the EFI_GUID in ResetData
+ the platform must pick a supported reset type to perform.The platform may
+ optionally log the parameters from any non-normal reset that occurs.
+
+ @param[in] DataSize The size, in bytes, of ResetData.
+ @param[in] ResetData The data buffer starts with a Null-terminated string,
+ followed by the EFI_GUID.
+**/
+VOID
+EFIAPI
+ResetPlatformSpecific (
+ IN UINTN DataSize,
+ IN VOID *ResetData
+ )
+{
+ // Map the platform specific reset as reboot
+ ResetCold ();
+}
+
+/**
+ The ResetSystem function resets the entire platform.
+
+ @param[in] ResetType The type of reset to perform.
+ @param[in] ResetStatus The status code for the reset.
+ @param[in] DataSize The size, in bytes, of ResetData.
+ @param[in] ResetData For a ResetType of EfiResetCold, EfiResetWarm, or EfiResetShutdown
+ the data buffer starts with a Null-terminated string, optionally
+ followed by additional binary data. The string is a description
+ that the caller may use to further indicate the reason for the
+ system reset.
+**/
+VOID
+EFIAPI
+ResetSystem (
+ IN EFI_RESET_TYPE ResetType,
+ IN EFI_STATUS ResetStatus,
+ IN UINTN DataSize,
+ IN VOID *ResetData OPTIONAL
+ )
+{
+ switch (ResetType) {
+ case EfiResetWarm:
+ ResetWarm ();
+ break;
+
+ case EfiResetCold:
+ ResetCold ();
+ break;
+
+ case EfiResetShutdown:
+ ResetShutdown ();
+ return;
+
+ case EfiResetPlatformSpecific:
+ ResetPlatformSpecific (DataSize, ResetData);
+ return;
+
+ default:
+ return;
+ }
+}
diff --git a/ArmVirtPkg/Library/ArmVirtPsciResetSystemPeiLib/ArmVirtPsciResetSystemPeiLib.inf b/ArmVirtPkg/Library/ArmVirtPsciResetSystemPeiLib/ArmVirtPsciResetSystemPeiLib.inf new file mode 100644 index 0000000000..3a65706e8d --- /dev/null +++ b/ArmVirtPkg/Library/ArmVirtPsciResetSystemPeiLib/ArmVirtPsciResetSystemPeiLib.inf @@ -0,0 +1,39 @@ +#/** @file
+# Reset System lib using PSCI hypervisor or secure monitor calls
+#
+# Copyright (c) 2008, Apple Inc. All rights reserved.<BR>
+# Copyright (c) 2014-2020, Linaro Ltd. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+#**/
+
+[Defines]
+ INF_VERSION = 1.27
+ BASE_NAME = ArmVirtPsciResetSystemPeiLib
+ FILE_GUID = 551cfb98-c185-41a3-86bf-8cdb7e2a530c
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = ResetSystemLib|PEIM
+
+[Sources]
+ ArmVirtPsciResetSystemPeiLib.c
+
+[Packages]
+ ArmPkg/ArmPkg.dec
+ ArmVirtPkg/ArmVirtPkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ MdePkg/MdePkg.dec
+
+[LibraryClasses]
+ ArmSmcLib
+ ArmHvcLib
+ BaseLib
+ DebugLib
+ FdtLib
+ HobLib
+
+[Pcd]
+ gArmVirtTokenSpaceGuid.PcdDeviceTreeInitialBaseAddress
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