source: rtems/c/src/lib/libbsp/i386/force386/shmsupp/getcfg.c @ 98e4ebf

4.104.114.84.95
Last change on this file since 98e4ebf was 98e4ebf, checked in by Joel Sherrill <joel.sherrill@…>, on Oct 8, 1997 at 3:45:54 PM

Fixed typo in the pointer to the license terms.

  • Property mode set to 100644
File size: 2.1 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 FORCE CPU-386
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 FORCE CPU-386 does not have an interprocessor interrupt.
14 *
15 *          The following table illustrates the configuration limitations:
16 *
17 *                                   BUS     MAX
18 *                          MODE    ENDIAN  NODES
19 *                        ========= ====== =======
20 *                         POLLED    BIG    2+
21 *                        INTERRUPT **** NOT SUPPORTED ****
22 *
23 *  COPYRIGHT (c) 1989-1997.
24 *  On-Line Applications Research Corporation (OAR).
25 *  Copyright assigned to U.S. Government, 1994.
26 *
27 *  The license and distribution terms for this file may be
28 *  found in the file LICENSE in this distribution or at
29 *  http://www.OARcorp.com/rtems/license.html.
30 *
31 *  $Id$
32 */
33
34#include <rtems.h>
35#include <shm.h>
36#include <bsp.h>
37
38#define INTERRUPT 0
39#define POLLING   1        /* FORCE CPU-386 target is polling ONLY!!! */
40
41
42shm_config_table BSP_shm_cfgtbl;
43
44void Shm_Get_configuration(
45  rtems_unsigned32   localnode,
46  shm_config_table **shmcfg
47)
48{
49   set_segment( get_ds(), 0x00002000, 0xffffd000  );
50
51   BSP_shm_cfgtbl.base         = i386_Physical_to_logical(
52                                    get_ds(),
53                                    (void *) 0x20000000
54                                  );
55
56   BSP_shm_cfgtbl.length       = 1 * MEGABYTE;
57   BSP_shm_cfgtbl.format       = SHM_BIG;
58
59   BSP_shm_cfgtbl.cause_intr   = Shm_Cause_interrupt;
60
61#ifdef NEUTRAL_BIG
62   BSP_shm_cfgtbl.convert      = NULL_CONVERT;
63#else
64   BSP_shm_cfgtbl.convert      = CPU_swap_u32;
65#endif
66
67   BSP_shm_cfgtbl.poll_intr    = POLLED_MODE;
68   BSP_shm_cfgtbl.Intr.address = NO_INTERRUPT;
69   BSP_shm_cfgtbl.Intr.value   = NO_INTERRUPT;
70   BSP_shm_cfgtbl.Intr.length  = NO_INTERRUPT;
71
72   *shmcfg = &BSP_shm_cfgtbl;
73}
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