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//==========================================================================
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//
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// cpm.c
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//
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// PowerPC QUICC support functions
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//
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//==========================================================================
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//####ECOSGPLCOPYRIGHTBEGIN####
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// -------------------------------------------
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// This file is part of eCos, the Embedded Configurable Operating System.
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// Copyright (C) 2003 Gary Thomas
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//
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// eCos is free software; you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 or (at your option) any later version.
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with eCos; if not, write to the Free Software Foundation, Inc.,
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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//
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// As a special exception, if other files instantiate templates or use macros
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// or inline functions from this file, or you compile this file and link it
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// with other works to produce a work based on this file, this file does not
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// by itself cause the resulting work to be covered by the GNU General Public
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// License. However the source code for this file must still be made available
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// in accordance with section (3) of the GNU General Public License.
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//
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// This exception does not invalidate any other reasons why a work based on
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// this file might be covered by the GNU General Public License.
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//
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// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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// at http://sources.redhat.com/ecos/ecos-license/
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// -------------------------------------------
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//####ECOSGPLCOPYRIGHTEND####
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//==========================================================================
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//#####DESCRIPTIONBEGIN####
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//
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// Author(s): Gary Thomas
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// Contributors:
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// Date: 2003-03-04
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// Purpose: Common support for the QUICC/CPM
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// Description:
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//
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// Usage:
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// Notes:
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//
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//####DESCRIPTIONEND####
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//
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//==========================================================================
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#include <pkgconf/hal.h>
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#include <pkgconf/hal_powerpc_quicc.h>
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#include <cyg/infra/cyg_type.h>
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#include <cyg/hal/hal_arch.h>
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#include <string.h> // memset
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#ifdef CYGPKG_HAL_POWERPC_MPC860
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// eCos headers decribing PowerQUICC:
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#include <cyg/hal/quicc/ppc8xx.h>
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// Information about DPRAM usage
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// This lets the CPM/DPRAM information be shared by all environments
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//
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static short *nextBd = (short *)(CYGHWR_HAL_VSR_TABLE + 0x1F0);
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/*
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* Reset the communications processor
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*/
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void
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_mpc8xx_reset_cpm(void)
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{
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EPPC *eppc = eppc_base();
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static int init_done = 0;
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if (init_done) return;
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init_done++;
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eppc->cp_cr = QUICC_CPM_CR_RESET | QUICC_CPM_CR_BUSY;
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memset(eppc->pram, 0, sizeof(eppc->pram));
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while (eppc->cp_cr & QUICC_CPM_CR_BUSY)
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CYG_EMPTY_STATEMENT;
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*nextBd = QUICC_BD_BASE;
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}
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//
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// Allocate a chunk of memory in the shared CPM memory, typically
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// used for buffer descriptors, etc. The length will be aligned
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// to a multiple of 8 bytes.
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//
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unsigned short
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_mpc8xx_allocBd(int len)
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{
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unsigned short bd;
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bd = *nextBd;
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if ((bd < QUICC_BD_BASE) || (bd > QUICC_BD_END)) {
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// Most likely not set up - make a guess :-(
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bd = *nextBd = QUICC_BD_BASE+0x400;
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}
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len = (len + 7) & ~7; // Multiple of 8 bytes
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*nextBd += len;
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if (*nextBd >= QUICC_BD_END) {
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*nextBd = QUICC_BD_BASE;
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}
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return bd;
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}
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#endif // CYGPKG_HAL_POWERPC_MPC860
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// EOF cpm.c
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