[PATCH v2 26/41] arm : acpi add xen environment table

[Parth Dixit <parth.dixit@linaro.org>]

Xen environment table is ACPI table that is used to pass grant table
and event channel interrupt information to dom0.

Signed-off-by: Parth Dixit <parth.dixit@linaro.org>
---
 xen/include/acpi/actbl2.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/xen/include/acpi/actbl2.h b/xen/include/acpi/actbl2.h
index 9c8d807..fc3ec2d 100644
--- a/xen/include/acpi/actbl2.h
+++ b/xen/include/acpi/actbl2.h
@@ -80,6 +80,7 @@
 #define ACPI_SIG_WDDT           "WDDT"	/* Watchdog Timer Description Table */
 #define ACPI_SIG_WDRT           "WDRT"	/* Watchdog Resource Table */
 #define ACPI_SIG_STAO           "STAO" /* Status Override Table */
+#define ACPI_SIG_XENV           "XENV" /* Xen Environment Table */
 
 #ifdef ACPI_UNDEFINED_TABLES
 /*
@@ -909,6 +910,25 @@ struct acpi_table_stao {
 
 /*******************************************************************************
  *
+ * XENV - Xen Environment Table
+ *        Version 0.2
+ *
+ ******************************************************************************/
+
+struct acpi_table_xenv {
+    struct acpi_table_header header;    /* Common ACPI table header */
+    u64 gnt_start;    /* Starting address of Xen grant table region */
+    u64 gnt_size;     /* Size of Xen grant table region */
+    u32 evt_intr;    /* Xen event channel interrupt */
+    u8  evt_intr_flag;    /* Flags for event channel interrupt */
+};
+
+/* Event Channel Interrupt Flags */
+#define EVT_CHN_INTR_MODE (1 << 0)
+#define EVT_CHN_INTR_TRIG (1 << 1)
+
+/*******************************************************************************
+ *
  * WAET - Windows ACPI Emulated devices Table
  *        Version 1
  *
-- 
1.9.1