Subversion Repositories openrisc

#ifndef CYGONCE_HAL_MMU_H

#define CYGONCE_HAL_MMU_H

//==========================================================================

//

//      hal_mmu.h

//

//      MMU definitions

//

//==========================================================================

// ####ECOSGPLCOPYRIGHTBEGIN####                                            

// -------------------------------------------                              

// This file is part of eCos, the Embedded Configurable Operating System.   

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.

//

// eCos is free software; you can redistribute it and/or modify it under    

// the terms of the GNU General Public License as published by the Free     

// Software Foundation; either version 2 or (at your option) any later      

// version.                                                                 

//

// eCos is distributed in the hope that it will be useful, but WITHOUT      

// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or    

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License    

// for more details.                                                        

//

// You should have received a copy of the GNU General Public License        

// along with eCos; if not, write to the Free Software Foundation, Inc.,    

// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.            

//

// As a special exception, if other files instantiate templates or use      

// macros or inline functions from this file, or you compile this file      

// and link it with other works to produce a work based on this file,       

// this file does not by itself cause the resulting work to be covered by   

// the GNU General Public License. However the source code for this file    

// must still be made available in accordance with section (3) of the GNU   

// General Public License v2.                                               

//

// This exception does not invalidate any other reasons why a work based    

// on this file might be covered by the GNU General Public License.         

// -------------------------------------------                              

// ####ECOSGPLCOPYRIGHTEND####                                              

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    gthomas

// Contributors: gthomas

// Date:         1999-05-10

// Purpose:      Define MMU for ARM

// Usage:        #include <cyg/hal/hal_mmu.h>

//              

//####DESCRIPTIONEND####

//

//==========================================================================

#define MMU_L1_TYPE         0x03  // Descriptor type

#define MMU_L1_TYPE_Fault   0x00  // Invalid

#define MMU_L1_TYPE_Page    0x11  // Individual page mapping

#define MMU_L1_TYPE_Section 0x12  // Mapping for 1M segment

#define MMU_L2_TYPE         0x03  // Descriptor type

#define MMU_L2_TYPE_Fault   0x00  // Invalid data

#define MMU_L2_TYPE_Large   0x01  // Large page (64K)

#define MMU_L2_TYPE_Small   0x02  // Small page (4K)

#define MMU_Bufferable      0x04  // Data can use write-buffer

#define MMU_Cacheable       0x08  // Data can use cache

#define MMU_AP_Limited     0x000  // Limited access

#define MMU_AP_Supervisor  0x400  // Supervisor RW, User none

#define MMU_AP_UserRead    0x800  // Supervisor RW, User read only

#define MMU_AP_Any         0xC00  // Supervisor RW, User RW

#define MMU_AP_ap0_Any     0x030

#define MMU_AP_ap1_Any     0x0C0

#define MMU_AP_ap2_Any     0x300

#define MMU_AP_ap3_Any     0xC00

#define MMU_AP_All (MMU_AP_ap0_Any|MMU_AP_ap1_Any|MMU_AP_ap2_Any|MMU_AP_ap3_Any)

#define MMU_DOMAIN(x)      ((x)<<5)

#define MMU_PAGE_SIZE      0x1000

#define MMU_SECTION_SIZE   0x100000

#define MMU_CP               p15      // Co-processor ID 

#define MMU_Control          c1       // Control register

#define MMU_Base             c2       // Page tables base

#define MMU_DomainAccess     c3       // Domain access control

#define MMU_FaultStatus      c5       // Fault status register

#define MMU_FaultAddress     c6       // Fault Address

#define MMU_InvalidateCache  c7       // Invalidate cache data

#define MMU_TLB              c8       // Translation Lookaside Buffer

// These seem to be 710 specific

#define MMU_FlushTLB         c5

#define MMU_FlushIDC         c7

#define MMU_Control_M  0x001    // Enable MMU

#define MMU_Control_A  0x002    // Enable address alignment faults

#define MMU_Control_C  0x004    // Enable cache

#define MMU_Control_W  0x008    // Enable write-buffer

#define MMU_Control_P  0x010    // Compatability: 32 bit code

#define MMU_Control_D  0x020    // Compatability: 32 bit data

#define MMU_Control_L  0x040    // Compatability:

#define MMU_Control_B  0x080    // Enable Big-Endian

#define MMU_Control_S  0x100    // Enable system protection

#define MMU_Control_R  0x200    // Enable ROM protection

#define MMU_Control_I  0x1000   // Enable Instruction cache

#define MMU_Control_X  0x2000   // Set interrupt vectors at 0xFFFF0000

#define MMU_Control_Init (MMU_Control_P|MMU_Control_D|MMU_Control_L)

// Extras for some newer versions eg. ARM920 with architecture version 4.

#define MMU_Control_F  0x400    // IMPLEMENTATION DEFINED

#define MMU_Control_Z  0x800    // Enable branch predicion

#define MMU_Control_RR 0x4000   // Select non-random cache replacement

//-----------------------------------------------------------------------------

#endif // CYGONCE_HAL_MMU_H

// End of hal_mmu.h