Subversion Repositories or1k

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

//

//      var_misc.c

//

//      HAL implementation miscellaneous functions

//

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

//####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):    nickg

// Contributors: nickg, jlarmour, dmoseley

// Date:         2000-07-14

// Purpose:      HAL miscellaneous functions

// Description:  This file contains miscellaneous functions provided by the

//               HAL.

//

//####DESCRIPTIONEND####

//

//========================================================================*/

#include <pkgconf/hal.h>

#include <cyg/infra/cyg_type.h>         // Base types

#include <cyg/infra/cyg_trac.h>         // tracing macros

#include <cyg/infra/cyg_ass.h>          // assertion macros

#include <cyg/hal/hal_intr.h>

#define CYGARC_HAL_COMMON_EXPORT_CPU_MACROS

#include <cyg/hal/hal_arch.h>

#include <cyg/hal/var_arch.h>

#include <cyg/hal/plf_io.h>

#include <cyg/hal/hal_cache.h>

/*------------------------------------------------------------------------*/

// Array which stores the configured priority levels for the configured

// interrupts.

volatile CYG_BYTE hal_interrupt_level[CYGNUM_HAL_ISR_COUNT];

/*------------------------------------------------------------------------*/

void hal_variant_init(void)

{

}

/*

 * Uncomment the following to allow for dynamic cache sizing.

 * Currently we are going to assume the exact part specified in the ecosconfig stuff.

 * Perhaps in the near future this can all be done dynamically.

 */

/* define DYNAMIC_CACHE_SIZING */

#if 0

#ifndef DYNAMIC_CACHE_SIZING

#warning "                                                                           \n\

STILL NEED TO IMPLEMENT DYNAMIC_CACHE_SIZING.                                        \n\

ALSO, the HAL_PLATFORM_CPU/etc defines need to be dynamic.                           \n\

ALSO, need to do big endian stuff as well.                                           \n\

Determine if network debug is necessary.                                             \n\

Remove MIPS memc_init code"

#endif

#endif

/*------------------------------------------------------------------------*/

// Initialize the caches

int hal_init_icache(unsigned long config1_val)

{

#ifdef DYNAMIC_CACHE_SIZING

  int icache_linesize, icache_assoc, icache_sets, icache_lines, icache_size;

  unsigned long cache_addr;

  switch (config1_val & CONFIG1_IL)

    {

    case CONFIG1_ICACHE_LINE_SIZE_16_BYTES: icache_linesize = 16;      break;

    case CONFIG1_ICACHE_NOT_PRESET:         return -1;                 break;

    default:      /* Error */               return -1;                 break;

    }

  switch (config1_val & CONFIG1_IA)

    {

    case CONFIG1_ICACHE_DIRECT_MAPPED:      icache_assoc = 1;          break;

    case CONFIG1_ICACHE_2_WAY:              icache_assoc = 2;          break;

    case CONFIG1_ICACHE_3_WAY:              icache_assoc = 3;          break;

    case CONFIG1_ICACHE_4_WAY:              icache_assoc = 4;          break;

    default:      /* Error */               return -1;                 break;

    }

  switch (config1_val & CONFIG1_IS)

    {

    case CONFIG1_ICACHE_64_SETS_PER_WAY:    icache_sets = 64;          break;

    case CONFIG1_ICACHE_128_SETS_PER_WAY:   icache_sets = 128;         break;

    case CONFIG1_ICACHE_256_SETS_PER_WAY:   icache_sets = 256;         break;

    default:      /* Error */               return -1;                 break;

    }

  icache_lines = icache_sets * icache_assoc;

  icache_size = icache_lines * icache_linesize;

#endif /* DYNAMIC_CACHE_SIZING */

  /*

   * Reset does not invalidate the cache so let's do so now.

   */

  HAL_ICACHE_INVALIDATE_ALL();

#ifdef DYNAMIC_CACHE_SIZING

  return icache_size;

#else

  return HAL_ICACHE_SIZE;

#endif

}

int hal_init_dcache(unsigned long config1_val)

{

#ifdef DYNAMIC_CACHE_SIZING

  int dcache_linesize, dcache_assoc, dcache_sets, dcache_lines, dcache_size;

  switch (config1_val & CONFIG1_DL)

    {

    case CONFIG1_DCACHE_LINE_SIZE_16_BYTES: dcache_linesize = 16;      break;

    case CONFIG1_DCACHE_NOT_PRESET:         return -1;                 break;

    default:      /* Error */               return -1;                 break;

    }

  switch (config1_val & CONFIG1_DA)

    {

    case CONFIG1_DCACHE_DIRECT_MAPPED:      dcache_assoc = 1;          break;

    case CONFIG1_DCACHE_2_WAY:              dcache_assoc = 2;          break;

    case CONFIG1_DCACHE_3_WAY:              dcache_assoc = 3;          break;

    case CONFIG1_DCACHE_4_WAY:              dcache_assoc = 4;          break;

    default:      /* Error */               return -1;                 break;

    }

  switch (config1_val & CONFIG1_DS)

    {

    case CONFIG1_DCACHE_64_SETS_PER_WAY:    dcache_sets = 64;          break;

    case CONFIG1_DCACHE_128_SETS_PER_WAY:   dcache_sets = 128;         break;

    case CONFIG1_DCACHE_256_SETS_PER_WAY:   dcache_sets = 256;         break;

    default:      /* Error */               return -1;                 break;

    }

  dcache_lines = dcache_sets * dcache_assoc;

  dcache_size = dcache_lines * dcache_linesize;

#endif /* DYNAMIC_CACHE_SIZING */

  /*

   * Reset does not invalidate the cache so let's do so now.

   */

  HAL_DCACHE_INVALIDATE_ALL();

#ifdef DYNAMIC_CACHE_SIZING

  return dcache_size;

#else

  return HAL_DCACHE_SIZE;

#endif

}

void hal_c_cache_init(unsigned long config1_val)

{

  volatile unsigned val;

  if (hal_init_icache(config1_val) == -1)

    {

        /* Error */

        ;

    }

  if (hal_init_dcache(config1_val) == -1)

    {

        /* Error */

        ;

    }

  // enable cached KSEG0

  asm volatile("mfc0 %0,$16;" : "=r"(val));

  val &= ~3;

  asm volatile("mtc0 %0,$16;" : : "r"(val));

}

void hal_icache_sync(void)

{

    HAL_ICACHE_INVALIDATE_ALL();

}

void hal_dcache_sync(void)

{

    HAL_DCACHE_INVALIDATE_ALL();

}

/*------------------------------------------------------------------------*/

/* End of var_misc.c                                                      */