From feba919da450b9cf6a3caad0b5260b19d1ad9e41 Mon Sep 17 00:00:00 2001
From: Lv Zheng <lv.zheng@intel.com>
Date: Mon, 23 May 2016 23:54:43 +0800
Subject: EFI: Add AcpiOsStall()/AcpiOsSleep() support

This patch adds AcpiOsStall() and AcpiOsSleep() support.
Currently we do not support asynchronous polling of key stroke and timer,
so AcpiOsSleep() is simply an invocation of AcpiOsStall(). Lv Zheng.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
---
 source/include/platform/acefiex.h           |  8 +++--
 source/os_specific/service_layers/osefixf.c | 45 +++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+), 2 deletions(-)

diff --git a/source/include/platform/acefiex.h b/source/include/platform/acefiex.h
index fc1438738..1b74b545b 100644
--- a/source/include/platform/acefiex.h
+++ b/source/include/platform/acefiex.h
@@ -546,6 +546,11 @@ EFI_STATUS
     EFI_HANDLE                      ImageHandle);
 
 
+typedef
+EFI_STATUS
+(EFIAPI *EFI_STALL) (
+    UINTN                           Microseconds);
+
 typedef
 EFI_STATUS
 (EFIAPI *EFI_SET_WATCHDOG_TIMER) (
@@ -862,12 +867,11 @@ typedef struct _EFI_BOOT_SERVICES {
 #if 0
     EFI_EXIT_BOOT_SERVICES          ExitBootServices;
     EFI_GET_NEXT_MONOTONIC_COUNT    GetNextMonotonicCount;
-    EFI_STALL                       Stall;
 #else
     EFI_UNKNOWN_INTERFACE           ExitBootServices;
     EFI_UNKNOWN_INTERFACE           GetNextMonotonicCount;
-    EFI_UNKNOWN_INTERFACE           Stall;
 #endif
+    EFI_STALL                       Stall;
     EFI_SET_WATCHDOG_TIMER          SetWatchdogTimer;
 
 #if 0
diff --git a/source/os_specific/service_layers/osefixf.c b/source/os_specific/service_layers/osefixf.c
index 439494cbc..193381d00 100644
--- a/source/os_specific/service_layers/osefixf.c
+++ b/source/os_specific/service_layers/osefixf.c
@@ -705,6 +705,51 @@ AcpiOsGetTimer (
 }
 
 
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiOsStall
+ *
+ * PARAMETERS:  microseconds        - Time to sleep
+ *
+ * RETURN:      Blocks until sleep is completed.
+ *
+ * DESCRIPTION: Sleep at microsecond granularity
+ *
+ *****************************************************************************/
+
+void
+AcpiOsStall (
+    UINT32                  microseconds)
+{
+
+    if (microseconds)
+    {
+        uefi_call_wrapper (BS->Stall, 1, microseconds);
+    }
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiOsSleep
+ *
+ * PARAMETERS:  milliseconds        - Time to sleep
+ *
+ * RETURN:      Blocks until sleep is completed.
+ *
+ * DESCRIPTION: Sleep at millisecond granularity
+ *
+ *****************************************************************************/
+
+void
+AcpiOsSleep (
+    UINT64                  milliseconds)
+{
+
+    AcpiOsStall (milliseconds * ACPI_USEC_PER_MSEC);
+}
+
+
 /******************************************************************************
  *
  * FUNCTION:    AcpiOsAllocate
-- 
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