diff options
Diffstat (limited to 'ArmPkg/Library/ArmSmcPsciResetSystemLib')
6 files changed, 187 insertions, 6 deletions
diff --git a/ArmPkg/Library/ArmSmcPsciResetSystemLib/AArch64/Reset.S b/ArmPkg/Library/ArmSmcPsciResetSystemLib/AArch64/Reset.S new file mode 100644 index 0000000..1edca94 --- /dev/null +++ b/ArmPkg/Library/ArmSmcPsciResetSystemLib/AArch64/Reset.S @@ -0,0 +1,30 @@ +/** @file + ResetSystemLib implementation using PSCI calls + + Copyright (c) 2018, Linaro Ltd. 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. + +**/ + +#include <AsmMacroIoLibV8.h> + +ASM_FUNC(DisableMmuAndReenterPei) + stp x29, x30, [sp, #-16]! + mov x29, sp + + bl ArmDisableMmu + + // no memory accesses after MMU and caches have been disabled + + MOV64 (x0, FixedPcdGet64 (PcdFvBaseAddress)) + blr x0 + + // never returns + nop diff --git a/ArmPkg/Library/ArmSmcPsciResetSystemLib/AArch64/Reset.asm b/ArmPkg/Library/ArmSmcPsciResetSystemLib/AArch64/Reset.asm new file mode 100644 index 0000000..9e30c13 --- /dev/null +++ b/ArmPkg/Library/ArmSmcPsciResetSystemLib/AArch64/Reset.asm @@ -0,0 +1,35 @@ +;/** @file +; ResetSystemLib implementation using PSCI calls +; +; Copyright (c) 2018, Linaro Ltd. 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. +; +;**/ + + AREA Reset, CODE, READONLY + + EXPORT DisableMmuAndReenterPei + IMPORT ArmDisableMmu + +DisableMmuAndReenterPei + stp x29, x30, [sp, #-16]! + mov x29, sp + + bl ArmDisableMmu + + ; no memory accesses after MMU and caches have been disabled + + movl x0, FixedPcdGet64 (PcdFvBaseAddress) + blr x0 + + ; never returns + nop + + END diff --git a/ArmPkg/Library/ArmSmcPsciResetSystemLib/Arm/Reset.S b/ArmPkg/Library/ArmSmcPsciResetSystemLib/Arm/Reset.S new file mode 100644 index 0000000..b6fe2bd --- /dev/null +++ b/ArmPkg/Library/ArmSmcPsciResetSystemLib/Arm/Reset.S @@ -0,0 +1,29 @@ +/** @file + ResetSystemLib implementation using PSCI calls + + Copyright (c) 2018, Linaro Ltd. 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. + +**/ + +#include <AsmMacroIoLib.h> + +ASM_FUNC(DisableMmuAndReenterPei) + push {lr} + + bl ArmDisableMmu + + // no memory accesses after MMU and caches have been disabled + + MOV32 (r0, FixedPcdGet64 (PcdFvBaseAddress)) + blx r0 + + // never returns + nop diff --git a/ArmPkg/Library/ArmSmcPsciResetSystemLib/Arm/Reset.asm b/ArmPkg/Library/ArmSmcPsciResetSystemLib/Arm/Reset.asm new file mode 100644 index 0000000..fa4fbd0 --- /dev/null +++ b/ArmPkg/Library/ArmSmcPsciResetSystemLib/Arm/Reset.asm @@ -0,0 +1,34 @@ +;/** @file +; ResetSystemLib implementation using PSCI calls +; +; Copyright (c) 2018, Linaro Ltd. 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. +; +;**/ + + INCLUDE AsmMacroExport.inc + PRESERVE8 + + IMPORT ArmDisableMmu + +RVCT_ASM_EXPORT DisableMmuAndReenterPei + push {lr} + + bl ArmDisableMmu + + ; no memory accesses after MMU and caches have been disabled + + mov32 r0, FixedPcdGet64 (PcdFvBaseAddress) + blx r0 + + ; never returns + nop + + END diff --git a/ArmPkg/Library/ArmSmcPsciResetSystemLib/ArmSmcPsciResetSystemLib.c b/ArmPkg/Library/ArmSmcPsciResetSystemLib/ArmSmcPsciResetSystemLib.c index 10ceafd..3f7b8ae 100644 --- a/ArmPkg/Library/ArmSmcPsciResetSystemLib/ArmSmcPsciResetSystemLib.c +++ b/ArmPkg/Library/ArmSmcPsciResetSystemLib/ArmSmcPsciResetSystemLib.c @@ -1,7 +1,7 @@ /** @file
ResetSystemLib implementation using PSCI calls
- Copyright (c) 2017, Linaro Ltd. All rights reserved.<BR>
+ Copyright (c) 2017 - 2018, Linaro Ltd. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
@@ -81,6 +81,8 @@ ResetShutdown ( ArmCallSmc (&ArmSmcArgs);
}
+VOID DisableMmuAndReenterPei (VOID);
+
/**
This function causes the system to enter S3 and then wake up immediately.
@@ -92,7 +94,12 @@ EnterS3WithImmediateWake ( VOID
)
{
- VOID (*Reset)(VOID);
+ EFI_PHYSICAL_ADDRESS Alloc;
+ EFI_MEMORY_DESCRIPTOR *MemMap;
+ UINTN MemMapSize;
+ UINTN MapKey, DescriptorSize;
+ UINT32 DescriptorVersion;
+ EFI_STATUS Status;
if (FeaturePcdGet (PcdArmReenterPeiForCapsuleWarmReboot) &&
!EfiAtRuntime ()) {
@@ -101,11 +108,49 @@ EnterS3WithImmediateWake ( // immediate wake (which is used by capsule update) by disabling the MMU
// and interrupts, and jumping to the PEI entry point.
//
- Reset = (VOID (*)(VOID))(UINTN)FixedPcdGet64 (PcdFvBaseAddress);
- gBS->RaiseTPL (TPL_HIGH_LEVEL);
- ArmDisableMmu ();
- Reset ();
+ //
+ // Obtain the size of the memory map
+ //
+ MemMapSize = 0;
+ MemMap = NULL;
+ Status = gBS->GetMemoryMap (&MemMapSize, MemMap, &MapKey, &DescriptorSize,
+ &DescriptorVersion);
+ ASSERT (Status == EFI_BUFFER_TOO_SMALL);
+
+ //
+ // Add some slack to the allocation to cater for changes in the memory
+ // map if ExitBootServices () fails the first time around.
+ //
+ MemMapSize += SIZE_4KB;
+ Status = gBS->AllocatePages (AllocateAnyPages, EfiBootServicesData,
+ EFI_SIZE_TO_PAGES (MemMapSize), &Alloc);
+ ASSERT_EFI_ERROR (Status);
+
+ MemMap = (EFI_MEMORY_DESCRIPTOR *)(UINTN)Alloc;
+
+ Status = gBS->GetMemoryMap (&MemMapSize, MemMap, &MapKey, &DescriptorSize,
+ &DescriptorVersion);
+ ASSERT_EFI_ERROR (Status);
+
+ Status = gBS->ExitBootServices (gImageHandle, MapKey);
+ if (EFI_ERROR (Status)) {
+ //
+ // ExitBootServices () may fail the first time around if an event fired
+ // right after the call to GetMemoryMap() which allocated or freed memory.
+ // Since that first call to ExitBootServices () will disarm the timer,
+ // this is guaranteed not to happen again, so one additional attempt
+ // should suffice.
+ //
+ Status = gBS->GetMemoryMap (&MemMapSize, MemMap, &MapKey, &DescriptorSize,
+ &DescriptorVersion);
+ ASSERT_EFI_ERROR (Status);
+
+ Status = gBS->ExitBootServices (gImageHandle, MapKey);
+ ASSERT_EFI_ERROR (Status);
+ }
+
+ DisableMmuAndReenterPei ();
}
}
diff --git a/ArmPkg/Library/ArmSmcPsciResetSystemLib/ArmSmcPsciResetSystemLib.inf b/ArmPkg/Library/ArmSmcPsciResetSystemLib/ArmSmcPsciResetSystemLib.inf index 19021cd..3b8925c 100644 --- a/ArmPkg/Library/ArmSmcPsciResetSystemLib/ArmSmcPsciResetSystemLib.inf +++ b/ArmPkg/Library/ArmSmcPsciResetSystemLib/ArmSmcPsciResetSystemLib.inf @@ -21,6 +21,14 @@ VERSION_STRING = 1.0
LIBRARY_CLASS = ResetSystemLib
+[Sources.AARCH64]
+ AArch64/Reset.S | GCC
+ AArch64/Reset.asm | MSFT
+
+[Sources.ARM]
+ Arm/Reset.S | GCC
+ Arm/Reset.asm | RVCT
+
[Sources]
ArmSmcPsciResetSystemLib.c
|