var_misc.c

来自「eCos操作系统源码」· C语言 代码 · 共 106 行

//==========================================================================
//
//      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
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// 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
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// 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
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//
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// at http://sources.redhat.com/ecos/ecos-license/
// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    Bob Koninckx
// Contributors: Bob Koninckx
// Date:         2001-12-10
// Purpose:      HAL miscellaneous functions
// Description:  This file contains miscellaneous functions provided by the
//               HAL.
//
//####DESCRIPTIONEND####
//
//==========================================================================

#include <pkgconf/hal.h>

#define CYGARC_HAL_COMMON_EXPORT_CPU_MACROS
#include <cyg/hal/ppc_regs.h>
#include <cyg/infra/cyg_type.h>         // types
#include <cyg/infra/diag.h>             // diag_printf

#include <cyg/hal/hal_mem.h>            // some of the functions defined here

//--------------------------------------------------------------------------
void
hal_variant_init(void)
{
    // Disable serialization
    {
        cyg_uint32 ictrl;
        CYGARC_MFSPR (ICTRL, ictrl);
        ictrl |= ICTRL_NOSERSHOW;
        CYGARC_MTSPR (ICTRL, ictrl);
    }
}

//--------------------------------------------------------------------------
// Variant specific idle thread action.
bool
hal_variant_idle_thread_action( cyg_uint32 count )
{
    // Let architecture idle thread action run
    return true;
}

//---------------------------------------------------------------------------
// Use MMU resources to map memory regions.  
// Takes and returns an int used to ID the MMU resource to use. This ID
// is increased as resources are used and should be used for subsequent
// invocations.
//
// The MPC5xx CPUs do not have cache. Leave these functions empty
int
cyg_hal_map_memory (int id,CYG_ADDRESS virt, CYG_ADDRESS phys, 
                    cyg_int32 size, cyg_uint8 flags)
{
    return 0;
}

void
cyg_hal_clear_MMU (void)
{
}

//--------------------------------------------------------------------------
// End of var_misc.c