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+/**
+ * \file mmu.h
+ *
+ * \brief MMU configuration API prototypes
+ *
+ * This file contains the API prototypes and structure definitions
+ * for configuring ARMv7a MMU.
+*/
+
+/*
+* Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
+*/
+/*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions
+* are met:
+*
+* Redistributions of source code must retain the above copyright
+* notice, this list of conditions and the following disclaimer.
+*
+* Redistributions in binary form must reproduce the above copyright
+* notice, this list of conditions and the following disclaimer in the
+* documentation and/or other materials provided with the
+* distribution.
+*
+* Neither the name of Texas Instruments Incorporated nor the names of
+* its contributors may be used to endorse or promote products derived
+* from this software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+*/
+
+#ifndef __MMU_H
+#define __MMU_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+** Number of entries in a page table. This is only for first level page table
+*/
+#define MMU_PAGETABLE_NUM_ENTRY (4096)
+
+/*
+** Alignment for Page Table. The Page Table shall be aligned to 16KB boundary.
+*/
+#define MMU_PAGETABLE_ALIGN_SIZE (16 * 1024)
+
+/*****************************************************************************/
+/*
+** Page Type for a region. To be assigned to 'pgType' field of a REGION
+** structure.
+** Eg: region.pgType = MMU_PGTYPE_SECTION
+*/
+/* To configure as a section. Section Size is 1MB */
+#define MMU_PGTYPE_SECTION (0xFFF04002)
+
+/* To configure as a super section. Super Section Size is 16MB */
+#define MMU_PGTYPE_SUPERSECTION (0xFF040002)
+
+/*****************************************************************************/
+/*
+** Access Control for a section, to be assigned to 'memAttrib' field
+** of a REGION structure.
+** Eg: region1.memAttrib = MMU_MEMTYPE_DEVICE_SHAREABLE;
+** region2.memAttrib = MMU_MEMTYPE_NORMAL_SHAREABLE(MMU_CACHE_WB_WA,
+** MMU_CACHE_WT_NOWA)
+*/
+/* Strongly Ordered memory - always shareable */
+#define MMU_MEMTYPE_STRONG_ORD_SHAREABLE (0x00000000)
+
+/* Shareable Device memory */
+#define MMU_MEMTYPE_DEVICE_SHAREABLE (0x00000004)
+
+/* Non-Shareable Device memory */
+#define MMU_MEMTYPE_DEVICE_NON_SHAREABLE (0x00002000)
+
+/*
+** Non-Shareable Normal memory. Cache Policies are given as parameters.
+** Eg : MMU_MEMTYPE_NORMAL_NON_SHAREABLE(MMU_CACHE_WB_WA, MMU_CACHE_WT_NOWA)
+*/
+#define MMU_MEMTYPE_NORMAL_NON_SHAREABLE(innerCachePol, outerCachePol) \
+ (0x00004000 \
+ | (outerCachePol << 12) \
+ | (innerCachePol << 2))
+
+/*
+** Shareable Normal memory. Cache Policies are given as parameters.
+** Eg : MMU_MEMTYPE_NORMAL_NON_SHAREABLE(MMU_CACHE_WB_WA, MMU_CACHE_WT_NOWA)
+*/
+#define MMU_MEMTYPE_NORMAL_SHAREABLE(innerCachePol, outerCachePol) \
+ (0x00014000 \
+ | (outerCachePol << 12) \
+ | (innerCachePol << 2))
+
+/*
+** Definitions for the parameters 'innerCachePol' & 'outerCachePol' to set
+** cache policies for Normal Memory to MMU_MEMTYPE_NORMAL_* macros
+*/
+/* Non Cacheable Memory */
+#define MMU_NON_CACHEABLE (0x00)
+
+/* Write Back, Write Allocate */
+#define MMU_CACHE_WB_WA (0x01)
+
+/* Write Through, No Write Allocate */
+#define MMU_CACHE_WT_NOWA (0x02)
+
+/* Write Back, No Write Allocate */
+#define MMU_CACHE_WB_NOWA (0x03)
+
+/*****************************************************************************/
+/*
+** Access Control for a section, to be assigned to 'secureType' field
+** of a REGION structure
+*/
+/* Secure physical address space is accessed */
+#define MMU_REGION_SECURE (0x00000000)
+
+/* Non-secure physical address space is accessed */
+#define MMU_REGION_NON_SECURE (0x00080000)
+
+/*****************************************************************************/
+/*
+** Access Control for a section, to be assigned to 'accsCtrl' field
+** of a REGION structure
+** region.accsCtrl = MMU_AP_PRV_RW_USR_RW;
+**
+** If the section is read sensitive, MMU_SECTION_EXEC_NEVER macro can be used
+** OR'ed with Acess Permissions.
+** region.accsCtrl = MMU_AP_PRV_RW_USR_NA | MMU_SECTION_EXEC_NEVER;
+*/
+/*
+** Macros for Access Permissions in both privilege modes
+*/
+/* Both Privileged and User Permission- No Access*/
+#define MMU_AP_PRV_NA_USR_NA (0x0000)
+
+/* Privileged Permission - Read/Write, User Permission- No Access*/
+#define MMU_AP_PRV_RW_USR_NA (0x0400)
+
+/* Privileged Permission - Read/Write, User Permission- Read Only */
+#define MMU_AP_PRV_RW_USR_RO (0x0800)
+
+/* Both Privileged Permission and User Permission - Read/Write*/
+#define MMU_AP_PRV_RW_USR_RW (0x0C00)
+
+/* Privileged Permission - Read Only, User Permission- No Access*/
+#define MMU_AP_PRV_RO_USR_NA (0x8400)
+
+/*
+** Macro to be used if the section is not to be executed and is
+** read sensitive.
+*/
+#define MMU_SECTION_EXEC_NEVER (0x00000010)
+
+/*****************************************************************************/
+/*
+** Structure for defining memory regions.
+** Assumed Virtual Address = Physical Address.
+*/
+typedef struct region {
+ unsigned int pgType; /* Type of the Page (Section/ Super Section)*/
+ unsigned int startAddr; /* Start Address of the page */
+ unsigned int numPages; /* Number of Pages in the region */
+ unsigned int memAttrib; /* Memory Type and Cache Settings */
+ unsigned int secureType; /* Security Type */
+ unsigned int accsCtrl; /* Access Permissions for the page */
+ unsigned int *masterPtPtr; /* Pointer to the Master Page table */
+} REGION;
+
+/****************************************************************************/
+/*
+** API prototypes for configuring ARMv7a MMU.
+*/
+extern void MMUInit(unsigned int *masterPt);
+extern void MMUMemRegionMap(REGION *region);
+extern void MMUEnable(unsigned int *masterPt);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* __MMU_H__ */