linux-kernel - [PATCH 12/14 v2] msm: iommu: Definitions for extended memory attributes

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Date:	Mon, 15 Nov 2010 18:19:35 -0800
From:	Stepan Moskovchenko <stepanm@...eaurora.org>
To:	dwalker@...eaurora.org
Cc:	davidb@...eaurora.org, bryanh@...eaurora.org,
	linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Stepan Moskovchenko <stepanm@...eaurora.org>
Subject: [PATCH 12/14 v2] msm: iommu: Definitions for extended memory attributes

Add the register field definitions and memory attribute
definitions that will be needed to support IOMMU
transactions with cache-coherent memory access.

Signed-off-by: Stepan Moskovchenko <stepanm@...eaurora.org>
---
 arch/arm/mach-msm/include/mach/iommu.h         |   13 +++++++++++++
 arch/arm/mach-msm/include/mach/iommu_hw-8xxx.h |   22 +++++++++++++++++++++-
 2 files changed, 34 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-msm/include/mach/iommu.h b/arch/arm/mach-msm/include/mach/iommu.h
index 17fc79f..296c0f1 100644
--- a/arch/arm/mach-msm/include/mach/iommu.h
+++ b/arch/arm/mach-msm/include/mach/iommu.h
@@ -20,6 +20,19 @@

 #include <linux/interrupt.h>

+/* Sharability attributes of MSM IOMMU mappings */
+#define MSM_IOMMU_ATTR_NON_SH		0x0
+#define MSM_IOMMU_ATTR_SH		0x4
+
+/* Cacheability attributes of MSM IOMMU mappings */
+#define MSM_IOMMU_ATTR_NONCACHED	0x0
+#define MSM_IOMMU_ATTR_CACHED_WB_WA	0x1
+#define MSM_IOMMU_ATTR_CACHED_WB_NWA	0x2
+#define MSM_IOMMU_ATTR_CACHED_WT	0x3
+
+/* Mask for the cache policy attribute */
+#define MSM_IOMMU_CP_MASK		0x03
+
 /* Maximum number of Machine IDs that we are allowing to be mapped to the same
  * context bank. The number of MIDs mapped to the same CB does not affect
  * performance, but there is a practical limit on how many distinct MIDs may
diff --git a/arch/arm/mach-msm/include/mach/iommu_hw-8xxx.h b/arch/arm/mach-msm/include/mach/iommu_hw-8xxx.h
index f9386d3..c2c3da9 100644
--- a/arch/arm/mach-msm/include/mach/iommu_hw-8xxx.h
+++ b/arch/arm/mach-msm/include/mach/iommu_hw-8xxx.h
@@ -54,6 +54,7 @@ do { \

 #define NUM_FL_PTE	4096
 #define NUM_SL_PTE	256
+#define NUM_TEX_CLASS	8

 /* First-level page table bits */
 #define FL_BASE_MASK		0xFFFFFC00
@@ -63,6 +64,9 @@ do { \
 #define FL_AP_WRITE		(1 << 10)
 #define FL_AP_READ		(1 << 11)
 #define FL_SHARED		(1 << 16)
+#define FL_BUFFERABLE		(1 << 2)
+#define FL_CACHEABLE		(1 << 3)
+#define FL_TEX0			(1 << 12)
 #define FL_OFFSET(va)		(((va) & 0xFFF00000) >> 20)

 /* Second-level page table bits */
@@ -73,8 +77,20 @@ do { \
 #define SL_AP0			(1 << 4)
 #define SL_AP1			(2 << 4)
 #define SL_SHARED		(1 << 10)
+#define SL_BUFFERABLE		(1 << 2)
+#define SL_CACHEABLE		(1 << 3)
+#define SL_TEX0			(1 << 6)
 #define SL_OFFSET(va)		(((va) & 0xFF000) >> 12)

+/* Memory type and cache policy attributes */
+#define MT_SO			0
+#define MT_DEV			1
+#define MT_NORMAL		2
+#define CP_NONCACHED		0
+#define CP_WB_WA		1
+#define CP_WT			2
+#define CP_WB_NWA		3
+
 /* Global register setters / getters */
 #define SET_M2VCBR_N(b, N, v)	 SET_GLOBAL_REG_N(M2VCBR_N, N, (b), (v))
 #define SET_CBACR_N(b, N, v)	 SET_GLOBAL_REG_N(CBACR_N, N, (b), (v))
@@ -706,7 +722,9 @@ do { \
 #define GET_OCPC5(b, c)		GET_CONTEXT_FIELD(b, c, NMRR, OCPC5)
 #define GET_OCPC6(b, c)		GET_CONTEXT_FIELD(b, c, NMRR, OCPC6)
 #define GET_OCPC7(b, c)		GET_CONTEXT_FIELD(b, c, NMRR, OCPC7)
-
+#define NMRR_ICP(nmrr, n)	(((nmrr) & (3 << ((n) * 2))) >> ((n) * 2))
+#define NMRR_OCP(nmrr, n)	(((nmrr) & (3 << ((n) * 2 + 16))) >> \
+								((n) * 2 + 16))

 /* PAR */
 #define GET_FAULT(b, c)		GET_CONTEXT_FIELD(b, c, PAR, FAULT)
@@ -750,6 +768,8 @@ do { \
 #define GET_NOS5(b, c)		GET_CONTEXT_FIELD(b, c, PRRR, NOS5)
 #define GET_NOS6(b, c)		GET_CONTEXT_FIELD(b, c, PRRR, NOS6)
 #define GET_NOS7(b, c)		GET_CONTEXT_FIELD(b, c, PRRR, NOS7)
+#define PRRR_NOS(prrr, n)	 ((prrr) & (1 << ((n) + 24)) ? 1 : 0)
+#define PRRR_MT(prrr, n)	 ((((prrr) & (3 << ((n) * 2))) >> ((n) * 2)))


 /* RESUME */
--
1.7.0.2

Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

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