1 //==========================================================================
5 // PowerPC QUICC2 support functions
7 //==========================================================================
8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // -------------------------------------------
10 // This file is part of eCos, the Embedded Configurable Operating System.
11 // Copyright (C) 2003 Gary Thomas
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 version.
17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 // You should have received a copy of the GNU General Public License along
23 // with eCos; if not, write to the Free Software Foundation, Inc.,
24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
26 // As a special exception, if other files instantiate templates or use macros
27 // or inline functions from this file, or you compile this file and link it
28 // with other works to produce a work based on this file, this file does not
29 // by itself cause the resulting work to be covered by the GNU General Public
30 // License. However the source code for this file must still be made available
31 // in accordance with section (3) of the GNU General Public License.
33 // This exception does not invalidate any other reasons why a work based on
34 // this file might be covered by the GNU General Public License.
36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
37 // at http://sources.redhat.com/ecos/ecos-license/
38 // -------------------------------------------
39 //####ECOSGPLCOPYRIGHTEND####
40 //==========================================================================
41 //#####DESCRIPTIONBEGIN####
43 // Author(s): Gary Thomas
46 // Purpose: Common support for the QUICC2/CPM
52 //####DESCRIPTIONEND####
54 //==========================================================================
56 #include <pkgconf/hal.h>
57 #include <cyg/infra/cyg_type.h>
58 #include <cyg/infra/cyg_ass.h>
59 #include <cyg/hal/hal_arch.h>
60 #include <string.h> // memset
62 // eCos headers decribing PowerQUICC2:
63 #include <cyg/hal/mpc8xxx.h>
65 // Information about DPRAM usage
66 // This lets the CPM/DPRAM information be shared by all environments
68 static struct dpram_info {
69 unsigned int offset, len;
71 { DPRAM_BD_OFFSET, 0x1000 },
75 static int *nextBd = (int *)(CYGHWR_HAL_VSR_TABLE + 0x1F0);
76 static struct dpram_info **info = (struct dpram_info **)(CYGHWR_HAL_VSR_TABLE + 0x1F4);
79 * Reset the communications processor
83 _mpc8xxx_reset_cpm(void)
85 static int init_done = 0;
87 if (init_done) return;
90 IMM->cpm_cpcr = CPCR_RST | CPCR_FLG;
91 while (IMM->cpm_cpcr & CPCR_FLG)
94 *nextBd = CPM_DPRAM[0].offset;
96 // Set up SMCx offsets
97 IMM->pram.standard.smc1 = DPRAM_SMC1_OFFSET;
98 IMM->pram.standard.smc2 = DPRAM_SMC2_OFFSET;
102 // Allocate a chunk of memory in the shared CPM memory, typically
103 // used for buffer descriptors, etc. The length will be aligned
104 // to a multiple of 8 bytes. This is somewhat complicated on the
105 // QUICC2/CPM since there are multiple regions of shared DPRAM
106 // which are legal to use, of varying size and spread all over.
109 _mpc8xxx_allocBd(int len)
111 struct dpram_info *ip = *info;
115 len = (len + 7) & ~7; // Multiple of 8 bytes
117 if (*nextBd >= (ip->offset+ip->len)) {
119 *nextBd = ip->offset;