From b6d542e927a3fa0ff4fd7278917f25b0494c07ba Mon Sep 17 00:00:00 2001
From: Laszlo Ersek <lersek@redhat.com>
Date: Fri, 17 Apr 2020 17:37:49 +0200
Subject: OvmfPkg/ResetSystemLib: factor out ResetShutdown()
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Move the ResetShutdown() definition to its own file. This will help us
introduce:

- a new library instance that is not broken in runtime modules (the
  current library instance is broken in runtime modules),

- another new library instance for bhyve support.

While at it, squash AcpiPmControl() into ResetShutdown(), open-coding
SuspendType=0. This is justified because we've had no other callers for
AcpiPmControl() since commit 2d9950a2bff8 ("OvmfPkg: remove
EnterS3WithImmediateWake () from ResetSystemLib", 2020-01-10).

Tested with the "reset -s" UEFI shell command, on both i440fx and q35.

Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Cc: Rebecca Cran <rebecca@bsdio.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2675
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20200417153751.7110-5-lersek@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
Reviewed-by: Rebecca Cran <rebecca@bsdio.com>
---
 OvmfPkg/Library/ResetSystemLib/ResetShutdown.c | 51 ++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 OvmfPkg/Library/ResetSystemLib/ResetShutdown.c

(limited to 'OvmfPkg/Library/ResetSystemLib/ResetShutdown.c')

diff --git a/OvmfPkg/Library/ResetSystemLib/ResetShutdown.c b/OvmfPkg/Library/ResetSystemLib/ResetShutdown.c
new file mode 100644
index 0000000000..971d94fa57
--- /dev/null
+++ b/OvmfPkg/Library/ResetSystemLib/ResetShutdown.c
@@ -0,0 +1,51 @@
+/** @file
+  Reset System Library Shutdown API implementation for OVMF.
+
+  Copyright (C) 2020, Red Hat, Inc.
+  Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Base.h>                   // BIT13
+
+#include <Library/BaseLib.h>        // CpuDeadLoop()
+#include <Library/DebugLib.h>       // ASSERT()
+#include <Library/IoLib.h>          // IoOr16()
+#include <Library/PciLib.h>         // PciRead16()
+#include <Library/ResetSystemLib.h> // ResetShutdown()
+#include <OvmfPlatforms.h>          // OVMF_HOSTBRIDGE_DID
+
+/**
+  Calling this function causes the system to enter a power state equivalent
+  to the ACPI G2/S5 or G3 states.
+
+  System shutdown should not return, if it returns, it means the system does
+  not support shut down reset.
+**/
+VOID
+EFIAPI
+ResetShutdown (
+  VOID
+  )
+{
+  UINT16 AcpiPmBaseAddress;
+  UINT16 HostBridgeDevId;
+
+  AcpiPmBaseAddress = 0;
+  HostBridgeDevId = PciRead16 (OVMF_HOSTBRIDGE_DID);
+  switch (HostBridgeDevId) {
+  case INTEL_82441_DEVICE_ID:
+    AcpiPmBaseAddress = PIIX4_PMBA_VALUE;
+    break;
+  case INTEL_Q35_MCH_DEVICE_ID:
+    AcpiPmBaseAddress = ICH9_PMBASE_VALUE;
+    break;
+  default:
+    ASSERT (FALSE);
+    CpuDeadLoop ();
+  }
+
+  IoBitFieldWrite16 (AcpiPmBaseAddress + 4, 10, 13, 0);
+  IoOr16 (AcpiPmBaseAddress + 4, BIT13);
+  CpuDeadLoop ();
+}
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