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Diffstat (limited to 'cpsw/src/include/mmu.h')
-rwxr-xr-x | cpsw/src/include/mmu.h | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/cpsw/src/include/mmu.h b/cpsw/src/include/mmu.h new file mode 100755 index 0000000..a796168 --- /dev/null +++ b/cpsw/src/include/mmu.h @@ -0,0 +1,195 @@ +/** + * \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__ */ |