| 1 |
786 |
skrzyp |
//==========================================================================
|
| 2 |
|
|
//
|
| 3 |
|
|
// cpm.c
|
| 4 |
|
|
//
|
| 5 |
|
|
// PowerPC QUICC2 support functions
|
| 6 |
|
|
//
|
| 7 |
|
|
//==========================================================================
|
| 8 |
|
|
// ####ECOSGPLCOPYRIGHTBEGIN####
|
| 9 |
|
|
// -------------------------------------------
|
| 10 |
|
|
// This file is part of eCos, the Embedded Configurable Operating System.
|
| 11 |
|
|
// Copyright (C) 2003 Free Software Foundation, Inc.
|
| 12 |
|
|
//
|
| 13 |
|
|
// eCos is free software; you can redistribute it and/or modify it under
|
| 14 |
|
|
// the terms of the GNU General Public License as published by the Free
|
| 15 |
|
|
// Software Foundation; either version 2 or (at your option) any later
|
| 16 |
|
|
// version.
|
| 17 |
|
|
//
|
| 18 |
|
|
// eCos is distributed in the hope that it will be useful, but WITHOUT
|
| 19 |
|
|
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
| 20 |
|
|
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
| 21 |
|
|
// for more details.
|
| 22 |
|
|
//
|
| 23 |
|
|
// You should have received a copy of the GNU General Public License
|
| 24 |
|
|
// along with eCos; if not, write to the Free Software Foundation, Inc.,
|
| 25 |
|
|
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
| 26 |
|
|
//
|
| 27 |
|
|
// As a special exception, if other files instantiate templates or use
|
| 28 |
|
|
// macros or inline functions from this file, or you compile this file
|
| 29 |
|
|
// and link it with other works to produce a work based on this file,
|
| 30 |
|
|
// this file does not by itself cause the resulting work to be covered by
|
| 31 |
|
|
// the GNU General Public License. However the source code for this file
|
| 32 |
|
|
// must still be made available in accordance with section (3) of the GNU
|
| 33 |
|
|
// General Public License v2.
|
| 34 |
|
|
//
|
| 35 |
|
|
// This exception does not invalidate any other reasons why a work based
|
| 36 |
|
|
// on this file might be covered by the GNU General Public License.
|
| 37 |
|
|
// -------------------------------------------
|
| 38 |
|
|
// ####ECOSGPLCOPYRIGHTEND####
|
| 39 |
|
|
//==========================================================================
|
| 40 |
|
|
//#####DESCRIPTIONBEGIN####
|
| 41 |
|
|
//
|
| 42 |
|
|
// Author(s): Gary Thomas
|
| 43 |
|
|
// Contributors:
|
| 44 |
|
|
// Date: 2003-03-04
|
| 45 |
|
|
// Purpose: Common support for the QUICC2/CPM
|
| 46 |
|
|
// Description:
|
| 47 |
|
|
//
|
| 48 |
|
|
// Usage:
|
| 49 |
|
|
// Notes:
|
| 50 |
|
|
//
|
| 51 |
|
|
//####DESCRIPTIONEND####
|
| 52 |
|
|
//
|
| 53 |
|
|
//==========================================================================
|
| 54 |
|
|
|
| 55 |
|
|
#include <pkgconf/hal.h>
|
| 56 |
|
|
#include <cyg/infra/cyg_type.h>
|
| 57 |
|
|
#include <cyg/infra/cyg_ass.h>
|
| 58 |
|
|
#include <cyg/hal/hal_arch.h>
|
| 59 |
|
|
#include <string.h> // memset
|
| 60 |
|
|
|
| 61 |
|
|
// eCos headers decribing PowerQUICC2:
|
| 62 |
|
|
#include <cyg/hal/mpc8xxx.h>
|
| 63 |
|
|
|
| 64 |
|
|
// Information about DPRAM usage
|
| 65 |
|
|
// This lets the CPM/DPRAM information be shared by all environments
|
| 66 |
|
|
//
|
| 67 |
|
|
static struct dpram_info {
|
| 68 |
|
|
unsigned int offset, len;
|
| 69 |
|
|
} CPM_DPRAM[] = {
|
| 70 |
|
|
{ DPRAM_BD_OFFSET, 0x1000 },
|
| 71 |
|
|
{ 0xB000, 0x1000 },
|
| 72 |
|
|
{ 0, 0}
|
| 73 |
|
|
};
|
| 74 |
|
|
static int *nextBd = (int *)(CYGHWR_HAL_VSR_TABLE + 0x1F0);
|
| 75 |
|
|
static struct dpram_info **info = (struct dpram_info **)(CYGHWR_HAL_VSR_TABLE + 0x1F4);
|
| 76 |
|
|
|
| 77 |
|
|
/*
|
| 78 |
|
|
* Reset the communications processor
|
| 79 |
|
|
*/
|
| 80 |
|
|
|
| 81 |
|
|
void
|
| 82 |
|
|
_mpc8xxx_reset_cpm(void)
|
| 83 |
|
|
{
|
| 84 |
|
|
static int init_done = 0;
|
| 85 |
|
|
|
| 86 |
|
|
if (init_done) return;
|
| 87 |
|
|
init_done++;
|
| 88 |
|
|
|
| 89 |
|
|
IMM->cpm_cpcr = CPCR_RST | CPCR_FLG;
|
| 90 |
|
|
while (IMM->cpm_cpcr & CPCR_FLG)
|
| 91 |
|
|
CYG_EMPTY_STATEMENT;
|
| 92 |
|
|
|
| 93 |
|
|
*nextBd = CPM_DPRAM[0].offset;
|
| 94 |
|
|
*info = CPM_DPRAM;
|
| 95 |
|
|
// Set up SMCx offsets
|
| 96 |
|
|
IMM->pram.standard.smc1 = DPRAM_SMC1_OFFSET;
|
| 97 |
|
|
IMM->pram.standard.smc2 = DPRAM_SMC2_OFFSET;
|
| 98 |
|
|
}
|
| 99 |
|
|
|
| 100 |
|
|
//
|
| 101 |
|
|
// Allocate a chunk of memory in the shared CPM memory, typically
|
| 102 |
|
|
// used for buffer descriptors, etc. The length will be aligned
|
| 103 |
|
|
// to a multiple of 8 bytes. This is somewhat complicated on the
|
| 104 |
|
|
// QUICC2/CPM since there are multiple regions of shared DPRAM
|
| 105 |
|
|
// which are legal to use, of varying size and spread all over.
|
| 106 |
|
|
//
|
| 107 |
|
|
unsigned int
|
| 108 |
|
|
_mpc8xxx_allocBd(int len)
|
| 109 |
|
|
{
|
| 110 |
|
|
struct dpram_info *ip = *info;
|
| 111 |
|
|
unsigned int bd;
|
| 112 |
|
|
|
| 113 |
|
|
bd = *nextBd;
|
| 114 |
|
|
len = (len + 7) & ~7; // Multiple of 8 bytes
|
| 115 |
|
|
*nextBd += len;
|
| 116 |
|
|
if (*nextBd >= (ip->offset+ip->len)) {
|
| 117 |
|
|
ip++;
|
| 118 |
|
|
*nextBd = ip->offset;
|
| 119 |
|
|
*info = ip;
|
| 120 |
|
|
}
|
| 121 |
|
|
return bd;
|
| 122 |
|
|
}
|
| 123 |
|
|
|
| 124 |
|
|
// EOF cpm.c
|
