diff options
| -rw-r--r-- | CorebootPayloadPkg/Library/ResetSystemLib/ResetSystemLib.c | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/CorebootPayloadPkg/Library/ResetSystemLib/ResetSystemLib.c b/CorebootPayloadPkg/Library/ResetSystemLib/ResetSystemLib.c index 77b81dbed0..55f5609629 100644 --- a/CorebootPayloadPkg/Library/ResetSystemLib/ResetSystemLib.c +++ b/CorebootPayloadPkg/Library/ResetSystemLib/ResetSystemLib.c @@ -112,11 +112,38 @@ ResetShutdown ( VOID
)
{
- AcpiPmControl (7);
+ EFI_HOB_GUID_TYPE *GuidHob;
+ ACPI_BOARD_INFO *pAcpiBoardInfo;
+ UINTN PmCtrlReg;
+
+ //
+ // Find the acpi board information guid hob
+ //
+ GuidHob = GetFirstGuidHob (&gUefiAcpiBoardInfoGuid);
+ ASSERT (GuidHob != NULL);
+ pAcpiBoardInfo = (ACPI_BOARD_INFO *)GET_GUID_HOB_DATA (GuidHob);
+
+ //
+ // GPE0_EN should be disabled to avoid any GPI waking up the system from S5
+ //
+ IoWrite16 ((UINTN)pAcpiBoardInfo->PmGpeEnBase, 0);
+
+ //
+ // Clear Power Button Status
+ //
+ IoWrite16((UINTN) pAcpiBoardInfo->PmEvtBase, BIT8);
+
+ //
+ // Transform system into S5 sleep state
+ //
+ PmCtrlReg = (UINTN)pAcpiBoardInfo->PmCtrlRegBase;
+ IoAndThenOr16 (PmCtrlReg, (UINT16) ~0x3c00, (UINT16) (7 << 10));
+ IoOr16 (PmCtrlReg, BIT13);
+ CpuDeadLoop ();
+
ASSERT (FALSE);
}
-
/**
Calling this function causes the system to enter a power state for capsule
update.
|