From: Betty Dall <betty.dall@hp.com>
Date: Wed, 8 Jan 2014 05:44:04 +0000 (+0800)
Subject: ACPICA: Add helper macros to extract bus/segment numbers from HEST table.
X-Git-Tag: next-20140116~74^2~7^2~11
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=36f3615152c1;p=karo-tx-linux.git

ACPICA: Add helper macros to extract bus/segment numbers from HEST table.

This change adds two macros to extract the encoded bus and segment
numbers from the HEST Bus field.

Signed-off-by: Betty Dall <betty.dall@hp.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h
index 556c83ee6b42..4ec8c194bfe5 100644
--- a/include/acpi/actbl1.h
+++ b/include/acpi/actbl1.h
@@ -457,7 +457,7 @@ struct acpi_hest_aer_common {
 	u8 enabled;
 	u32 records_to_preallocate;
 	u32 max_sections_per_record;
-	u32 bus;
+	u32 bus;		/* Bus and Segment numbers */
 	u16 device;
 	u16 function;
 	u16 device_control;
@@ -473,6 +473,14 @@ struct acpi_hest_aer_common {
 #define ACPI_HEST_FIRMWARE_FIRST        (1)
 #define ACPI_HEST_GLOBAL                (1<<1)
 
+/*
+ * Macros to access the bus/segment numbers in Bus field above:
+ *  Bus number is encoded in bits 7:0
+ *  Segment number is encoded in bits 23:8
+ */
+#define ACPI_HEST_BUS(bus)              ((bus) & 0xFF)
+#define ACPI_HEST_SEGMENT(bus)          (((bus) >> 8) & 0xFFFF)
+
 /* Hardware Error Notification */
 
 struct acpi_hest_notify {