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>

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
@@ -548,6 +548,11 @@ EFI_STATUS
 
 typedef
 EFI_STATUS
+(EFIAPI *EFI_STALL) (
+    UINTN                           Microseconds);
+
+typedef
+EFI_STATUS
 (EFIAPI *EFI_SET_WATCHDOG_TIMER) (
     UINTN                           Timeout,
     UINT64                          WatchdogCode,
@@ -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
@@ -707,6 +707,51 @@ 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
  *
  * PARAMETERS:  Size                - Amount to allocate, in bytes