EFI: Add AcpiOsGetTimer() support

This patch adds AcpiOsGetTimer() support for EFI environment.
Note that currently we don't support timezone. Lv Zheng.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>

source/include/platform/acefi.h

@@ -325,10 +325,12 @@ struct _SIMPLE_INPUT_INTERFACE;
 struct _EFI_FILE_IO_INTERFACE;
 struct _EFI_FILE_HANDLE;
 struct _EFI_BOOT_SERVICES;
+struct _EFI_RUNTIME_SERVICES;
 struct _EFI_SYSTEM_TABLE;
 
 extern struct _EFI_SYSTEM_TABLE         *ST;
 extern struct _EFI_BOOT_SERVICES        *BS;
+extern struct _EFI_RUNTIME_SERVICES     *RT;
 
 typedef union acpi_efi_file             ACPI_EFI_FILE;
 

source/include/platform/acefiex.h

@@ -615,6 +615,27 @@ EFI_STATUS
     VOID                            *Buffer);
 
 
+/*
+ * EFI Time
+ */
+typedef struct {
+    UINT32 Resolution;
+    UINT32 Accuracy;
+    BOOLEAN SetsToZero;
+} EFI_TIME_CAPABILITIES;
+
+typedef
+EFI_STATUS
+(EFIAPI *EFI_GET_TIME) (
+    EFI_TIME                    *Time,
+    EFI_TIME_CAPABILITIES       *Capabilities);
+
+typedef
+EFI_STATUS
+(EFIAPI *EFI_SET_TIME) (
+    EFI_TIME                    *Time);
+
+
 /*
  * Protocol handler functions
  */
@@ -879,6 +900,54 @@ typedef struct _EFI_BOOT_SERVICES {
 } EFI_BOOT_SERVICES;
 
 
+/*
+ * EFI Runtime Services Table
+ */
+#define EFI_RUNTIME_SERVICES_SIGNATURE  0x56524553544e5552
+#define EFI_RUNTIME_SERVICES_REVISION   (EFI_SPECIFICATION_MAJOR_REVISION<<16) | (EFI_SPECIFICATION_MINOR_REVISION)
+
+typedef struct _EFI_RUNTIME_SERVICES {
+    EFI_TABLE_HEADER                Hdr;
+
+    EFI_GET_TIME                    GetTime;
+    EFI_SET_TIME                    SetTime;
+#if 0
+    EFI_GET_WAKEUP_TIME             GetWakeupTime;
+    EFI_SET_WAKEUP_TIME             SetWakeupTime;
+#else
+    EFI_UNKNOWN_INTERFACE           GetWakeupTime;
+    EFI_UNKNOWN_INTERFACE           SetWakeupTime;
+#endif
+
+#if 0
+    EFI_SET_VIRTUAL_ADDRESS_MAP     SetVirtualAddressMap;
+    EFI_CONVERT_POINTER             ConvertPointer;
+#else
+    EFI_UNKNOWN_INTERFACE           SetVirtualAddressMap;
+    EFI_UNKNOWN_INTERFACE            ConvertPointer;
+#endif
+
+#if 0
+    EFI_GET_VARIABLE                GetVariable;
+    EFI_GET_NEXT_VARIABLE_NAME      GetNextVariableName;
+    EFI_SET_VARIABLE                SetVariable;
+#else
+    EFI_UNKNOWN_INTERFACE           GetVariable;
+    EFI_UNKNOWN_INTERFACE           GetNextVariableName;
+    EFI_UNKNOWN_INTERFACE           SetVariable;
+#endif
+
+#if 0
+    EFI_GET_NEXT_HIGH_MONO_COUNT    GetNextHighMonotonicCount;
+    EFI_RESET_SYSTEM                ResetSystem;
+#else
+    EFI_UNKNOWN_INTERFACE           GetNextHighMonotonicCount;
+    EFI_UNKNOWN_INTERFACE           ResetSystem;
+#endif
+
+} EFI_RUNTIME_SERVICES;
+
+
 /*
  * EFI System Table
  */
@@ -915,11 +984,7 @@ typedef struct _EFI_SYSTEM_TABLE {
     EFI_HANDLE                      StandardErrorHandle;
     SIMPLE_TEXT_OUTPUT_INTERFACE    *StdErr;
 
-#if 0
     EFI_RUNTIME_SERVICES            *RuntimeServices;
-#else
-    EFI_HANDLE                      *RuntimeServices;
-#endif
     EFI_BOOT_SERVICES               *BootServices;
 
     UINTN                           NumberOfTableEntries;

source/os_specific/service_layers/oseficlib.c

@@ -1190,6 +1190,7 @@ efi_main (
 
     ST = SystemTab;
     BS = SystemTab->BootServices;
+    RT = SystemTab->RuntimeServices;
 
     /* Disable the platform watchdog timer if we go interactive */
 

source/os_specific/service_layers/osefixf.c

@@ -644,6 +644,67 @@ AcpiOsWriteMemory (
 }
 
 
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiOsGetTimer
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Current time in 100 nanosecond units
+ *
+ * DESCRIPTION: Get the current system time
+ *
+ *****************************************************************************/
+
+UINT64
+AcpiOsGetTimer (
+    void)
+{
+    EFI_STATUS              EfiStatus;
+    EFI_TIME                EfiTime;
+    int                     Year, Month, Day;
+    int                     Hour, Minute, Second;
+    UINT64                  Timer;
+
+
+    EfiStatus = uefi_call_wrapper (RT->GetTime, 2, &EfiTime, NULL);
+    if (EFI_ERROR (EfiStatus))
+    {
+        return (-1);
+    }
+
+    Year = EfiTime.Year;
+    Month = EfiTime.Month;
+    Day = EfiTime.Day;
+    Hour = EfiTime.Hour;
+    Minute = EfiTime.Minute;
+    Second = EfiTime.Second;
+
+    /* 1..12 -> 11,12,1..10 */
+
+    if (0 >= (int) (Month -= 2))
+    {
+        /* Feb has leap days */
+
+        Month += 12;
+        Year -= 1;
+    }
+
+    /* Calculate days */
+
+    Timer = ((UINT64) (Year/4 - Year/100 + Year/400 + 367*Month/12 + Day) +
+                       Year*365 - 719499);
+
+    /* Calculate seconds */
+
+    Timer = ((Timer*24 + Hour) * 60 + Minute) * 60 + Second;
+
+    /* Calculate 100 nanoseconds */
+
+    return ((Timer * ACPI_100NSEC_PER_SEC) + (EfiTime.Nanosecond / 100));
+}
+
+
 /******************************************************************************
  *
  * FUNCTION:    AcpiOsAllocate