Subversion Repositories openrisc_me

#ifndef CYGONCE_HAL_MM_H

#define CYGONCE_HAL_MM_H

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

//

//      hal_mm.h

//

//      ARM SA11x0 MM common definitions 

//

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

//####ECOSGPLCOPYRIGHTBEGIN####

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

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

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, 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.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 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.

//

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

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

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

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

//####ECOSGPLCOPYRIGHTEND####

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

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

//

// Author(s):    gthomas

// Contributors: hmt

//               Travis C. Furrer <furrer@mit.edu>

// Date:         2000-12-13

// Purpose:      ARM SA11x0 MM common definitions

// Description:  The macros defined here provide common definitions for

//               memory management initialization.

// Usage:

//               #include <cyg/hal/hal_mm.h>

//               ...

//              

//

//####DESCRIPTIONEND####

//

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

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

// MMU initialization:

// 

// These structures are laid down in memory to define the translation

// table.

// 

/*

 * SA-1100 Translation Table Base Bit Masks

 */

#define ARM_TRANSLATION_TABLE_MASK               0xFFFFC000

/*

 * SA-1100 Domain Access Control Bit Masks

 */

#define ARM_ACCESS_TYPE_NO_ACCESS(domain_num)    (0x0 << (domain_num)*2)

#define ARM_ACCESS_TYPE_CLIENT(domain_num)       (0x1 << (domain_num)*2)

#define ARM_ACCESS_TYPE_MANAGER(domain_num)      (0x3 << (domain_num)*2)

struct ARM_MMU_FIRST_LEVEL_FAULT {

    unsigned int id : 2;

    unsigned int sbz : 30;

};

#define ARM_MMU_FIRST_LEVEL_FAULT_ID 0x0

struct ARM_MMU_FIRST_LEVEL_PAGE_TABLE {

    unsigned int id : 2;

    unsigned int imp : 2;

    unsigned int domain : 4;

    unsigned int sbz : 1;

    unsigned int base_address : 23;

};

#define ARM_MMU_FIRST_LEVEL_PAGE_TABLE_ID 0x1

struct ARM_MMU_FIRST_LEVEL_SECTION {

    unsigned int id : 2;

    unsigned int b : 1;

    unsigned int c : 1;

    unsigned int imp : 1;

    unsigned int domain : 4;

    unsigned int sbz0 : 1;

    unsigned int ap : 2;

    unsigned int sbz1 : 8;

    unsigned int base_address : 12;

};

#define ARM_MMU_FIRST_LEVEL_SECTION_ID 0x2

struct ARM_MMU_FIRST_LEVEL_RESERVED {

    unsigned int id : 2;

    unsigned int sbz : 30;

};

#define ARM_MMU_FIRST_LEVEL_RESERVED_ID 0x3

#define ARM_MMU_FIRST_LEVEL_DESCRIPTOR_ADDRESS(ttb_base, table_index) \

   (unsigned long *)((unsigned long)(ttb_base) + ((table_index) << 2))

#define ARM_FIRST_LEVEL_PAGE_TABLE_SIZE 0x4000

#define ARM_MMU_SECTION(ttb_base, actual_base, virtual_base,              \

                        cacheable, bufferable, perm)                      \

    CYG_MACRO_START                                                       \

        register union ARM_MMU_FIRST_LEVEL_DESCRIPTOR desc;               \

                                                                          \

        desc.word = 0;                                                    \

        desc.section.id = ARM_MMU_FIRST_LEVEL_SECTION_ID;                 \

        desc.section.domain = 0;                                          \

        desc.section.c = (cacheable);                                     \

        desc.section.b = (bufferable);                                    \

        desc.section.ap = (perm);                                         \

        desc.section.base_address = (actual_base);                        \

        *ARM_MMU_FIRST_LEVEL_DESCRIPTOR_ADDRESS(ttb_base, (virtual_base)) \

                            = desc.word;                                  \

    CYG_MACRO_END

#define X_ARM_MMU_SECTION(abase,vbase,size,cache,buff,access)      \

    { int i; int j = abase; int k = vbase;                         \

      for (i = size; i > 0 ; i--,j++,k++)                          \

      {                                                            \

        ARM_MMU_SECTION(ttb_base, j, k, cache, buff, access);      \

      }                                                            \

    }

union ARM_MMU_FIRST_LEVEL_DESCRIPTOR {

    unsigned long word;

    struct ARM_MMU_FIRST_LEVEL_FAULT fault;

    struct ARM_MMU_FIRST_LEVEL_PAGE_TABLE page_table;

    struct ARM_MMU_FIRST_LEVEL_SECTION section;

    struct ARM_MMU_FIRST_LEVEL_RESERVED reserved;

};

#define ARM_UNCACHEABLE                         0

#define ARM_CACHEABLE                           1

#define ARM_UNBUFFERABLE                        0

#define ARM_BUFFERABLE                          1

#define ARM_ACCESS_PERM_NONE_NONE               0

#define ARM_ACCESS_PERM_RO_NONE                 0

#define ARM_ACCESS_PERM_RO_RO                   0

#define ARM_ACCESS_PERM_RW_NONE                 1

#define ARM_ACCESS_PERM_RW_RO                   2

#define ARM_ACCESS_PERM_RW_RW                   3

/*

 * Initialization for the Domain Access Control Register

 */

#define ARM_ACCESS_DACR_DEFAULT      (          \

        ARM_ACCESS_TYPE_MANAGER(0)    |         \

        ARM_ACCESS_TYPE_NO_ACCESS(1)  |         \

        ARM_ACCESS_TYPE_NO_ACCESS(2)  |         \

        ARM_ACCESS_TYPE_NO_ACCESS(3)  |         \

        ARM_ACCESS_TYPE_NO_ACCESS(4)  |         \

        ARM_ACCESS_TYPE_NO_ACCESS(5)  |         \

        ARM_ACCESS_TYPE_NO_ACCESS(6)  |         \

        ARM_ACCESS_TYPE_NO_ACCESS(7)  |         \

        ARM_ACCESS_TYPE_NO_ACCESS(8)  |         \

        ARM_ACCESS_TYPE_NO_ACCESS(9)  |         \

        ARM_ACCESS_TYPE_NO_ACCESS(10) |         \

        ARM_ACCESS_TYPE_NO_ACCESS(11) |         \

        ARM_ACCESS_TYPE_NO_ACCESS(12) |         \

        ARM_ACCESS_TYPE_NO_ACCESS(13) |         \

        ARM_ACCESS_TYPE_NO_ACCESS(14) |         \

        ARM_ACCESS_TYPE_NO_ACCESS(15)  )

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

#endif // ifndef CYGONCE_HAL_MM_H

// End of hal_mm.h