source: rtems/c/src/lib/libbsp/m68k/mvme147s/shmsupp/getcfg.c @ b1b5a7cb

4.104.114.84.95
Last change on this file since b1b5a7cb was afe99c2, checked in by Joel Sherrill <joel.sherrill@…>, on Sep 18, 1996 at 2:17:54 PM

new file submitted by Dominique le Campion.

  • Property mode set to 100644
File size: 2.5 KB
Line 
1/*  void Shm_Get_configuration( localnode, &shmcfg )
2 *
3 *  This routine initializes, if necessary, and returns a pointer
4 *  to the Shared Memory Configuration Table for the MVME147.
5 *
6 *  INPUT PARAMETERS:
7 *    localnode - local node number
8 *    shmcfg    - address of pointer to SHM Config Table
9 *
10 *  OUTPUT PARAMETERS:
11 *    *shmcfg   - pointer to SHM Config Table
12 *
13 *  NOTES:  The SIGLP interrupt on the MVME147 is used as an interprocessor
14 *          interrupt.
15 *
16 *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
17 *  On-Line Applications Research Corporation (OAR).
18 *  All rights assigned to U.S. Government, 1994.
19 *
20 *  This material may be reproduced by or for the U.S. Government pursuant
21 *  to the copyright license under the clause at DFARS 252.227-7013.  This
22 *  notice must appear in all copies of this file and its derivatives.
23 *
24 *  MVME147 port for TNI - Telecom Bretagne
25 *  by Dominique LE CAMPION (Dominique.LECAMPION@enst-bretagne.fr)
26 *  June 1996
27 *
28 *  $Id$
29 */
30
31#include <bsp.h>
32#include <rtems.h>
33#include "shm.h"
34
35#define INTERRUPT 1                   /* MVME147 target supports both */
36#define POLLING   0                   /* polling and interrupt modes  */
37
38shm_config_table BSP_shm_cfgtbl;
39
40rtems_unsigned32 *BSP_int_address()
41{
42  rtems_unsigned32 id, offset;
43
44  id      = (rtems_unsigned32) vme_lcsr->gcsr_base_address;
45  offset  = (id << 4) & 0xF0;
46  offset |= 0xffff0003; /* points to GCSR global 1 */
47  return( (rtems_unsigned32 * ) offset );
48}
49
50void Shm_Get_configuration(
51  rtems_unsigned32   localnode,
52  shm_config_table **shmcfg
53)
54{
55  /* A shared mem space has bee left between RAM_END and DRAM_END
56   on the first node*/
57  if (localnode == 1)
58    BSP_shm_cfgtbl.base         = RAM_END; 
59  else
60    BSP_shm_cfgtbl.base         = DRAM_END + RAM_END;
61  BSP_shm_cfgtbl.length       = DRAM_END - RAM_END; 
62  BSP_shm_cfgtbl.format       = SHM_BIG;
63 
64  BSP_shm_cfgtbl.cause_intr   = Shm_Cause_interrupt;
65 
66#ifdef NEUTRAL_BIG
67  BSP_shm_cfgtbl.convert      = NULL_CONVERT;
68#else
69  BSP_shm_cfgtbl.convert      = CPU_swap_u32;
70#endif
71
72#if (POLLING==1)
73  BSP_shm_cfgtbl.poll_intr    = POLLED_MODE;
74  BSP_shm_cfgtbl.Intr.address = NO_INTERRUPT;
75  BSP_shm_cfgtbl.Intr.value   = NO_INTERRUPT;
76  BSP_shm_cfgtbl.Intr.length  = NO_INTERRUPT;
77#else
78  BSP_shm_cfgtbl.poll_intr    = INTR_MODE;
79  BSP_shm_cfgtbl.Intr.address = BSP_int_address(); /* GCSR global 1 */
80  BSP_shm_cfgtbl.Intr.value   = 0x01; /* SIGLP */
81  BSP_shm_cfgtbl.Intr.length  = BYTE;
82#endif
83
84  *shmcfg = &BSP_shm_cfgtbl;
85
86}
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