linux-kernel - [RFC PATCH 1/9] ACPICA: Introduce GIC version for arm based system

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Date:	Tue,  5 May 2015 21:50:49 +0800
From:	Hanjun Guo <hanjun.guo@...aro.org>
To:	Marc Zyngier <marc.zyngier@....com>,
	Jason Cooper <jason@...edaemon.net>,
	Will Deacon <will.deacon@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	Jiang Liu <jiang.liu@...ux.intel.com>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Arnd Bergmann <arnd@...db.de>,
	Tomasz Nowicki <tomasz.nowicki@...aro.org>,
	Grant Likely <grant.likely@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Olof Johansson <olof@...om.net>,
	linux-arm-kernel@...ts.infradead.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linaro-acpi@...ts.linaro.org,
	Hanjun Guo <hanjun.guo@...aro.org>
Subject: [RFC PATCH 1/9] ACPICA: Introduce GIC version for arm based system

From: Tomasz Nowicki <tomasz.nowicki@...aro.org>

A new field is added in GIC distributor to indication
the GIC version, support it in ACPICA for later use

Signed-off-by: Tomasz Nowicki <tomasz.nowicki@...aro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@...aro.org>
---
 include/acpi/actbl1.h | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h
index b80b0e6..b4f0f74 100644
--- a/include/acpi/actbl1.h
+++ b/include/acpi/actbl1.h
@@ -819,7 +819,7 @@ struct acpi_madt_generic_interrupt {
 #define ACPI_MADT_PERFORMANCE_IRQ_MODE  (1<<1)	/* 01: Performance Interrupt Mode */
 #define ACPI_MADT_VGIC_IRQ_MODE         (1<<2)	/* 02: VGIC Maintenance Interrupt mode */
 
-/* 12: Generic Distributor (ACPI 5.0) */
+/* 12: Generic Distributor (ACPI 6.0) */
 
 struct acpi_madt_generic_distributor {
 	struct acpi_subtable_header header;
@@ -827,7 +827,20 @@ struct acpi_madt_generic_distributor {
 	u32 gic_id;
 	u64 base_address;
 	u32 global_irq_base;
-	u32 reserved2;		/* reserved - must be zero */
+	u8  gic_version;
+	u8  reserved2[3];	/* reserved - must be zero */
+};
+
+/* Values for gic_version in Generic Distributor  (ACPI 6.0) */
+
+enum acpi_madt_gic_ver_type
+{
+	ACPI_MADT_GIC_VER_UNKNOWN	= 0,
+	ACPI_MADT_GIC_VER_V1		= 1,
+	ACPI_MADT_GIC_VER_V2		= 2,
+	ACPI_MADT_GIC_VER_V3		= 3,
+	ACPI_MADT_GIC_VER_V4		= 4,
+	ACPI_MADT_GIC_VER_RESERVED	= 5	/* 5 and greater are reserved */
 };
 
 /* 13: Generic MSI Frame (ACPI 5.1) */
-- 
1.9.1

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