source: rtems/c/src/lib/libbsp/hppa1.1/simhppa/shmsupp/getcfg.c @ 11290355

4.104.114.84.95
Last change on this file since 11290355 was 11290355, checked in by Joel Sherrill <joel.sherrill@…>, on 09/29/95 at 17:19:16

all targets compile .. tony's patches in place

  • Property mode set to 100644
File size: 2.7 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 HP PA-RISC
5 *  simulator.
6 *
7 *  INPUT PARAMETERS:
8 *    localnode - local node number
9 *    shmcfg    - address of pointer to SHM Config Table
10 *
11 *  OUTPUT PARAMETERS:
12 *    *shmcfg   - pointer to SHM Config Table
13 *
14 *  NOTES:  The MP interrupt used is the Runway bus' ability to directly
15 *          address the control registers of up to four CPUs and cause
16 *          interrupts on them.
17 *
18 *          The following table illustrates the configuration limitations:
19 *
20 *                                   BUS     MAX
21 *                          MODE    ENDIAN  NODES
22 *                        ========= ====== =======
23 *                         POLLED    BIG    2+
24 *                        INTERRUPT  BIG    2..4 (on Runway)
25 *
26 *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
27 *  On-Line Applications Research Corporation (OAR).
28 *  All rights assigned to U.S. Government, 1994.
29 *
30 *  This material may be reproduced by or for the U.S. Government pursuant
31 *  to the copyright license under the clause at DFARS 252.227-7013.  This
32 *  notice must appear in all copies of this file and its derivatives.
33 *
34 *  $Id$
35 */
36
37#include <bsp.h>
38#include <runway.h>
39
40#include <shm.h>
41
42#define INTERRUPT 0        /* can be interrupt or polling */
43#define POLLING   1
44
45#define HPPA_RUNWAY_PROC_HPA_BASE  ((void *) 0xFFFA0000)
46 
47/* given a processor number, where is its HPA? */
48#define HPPA_RUNWAY_HPA(cpu)   \
49  ((rtems_unsigned32) (HPPA_RUNWAY_PROC_HPA_BASE + ((cpu) * 0x2000)))
50 
51#define HPPA_RUNWAY_REG_IO_EIR_OFFSET   0x000
52
53shm_config_table BSP_shm_cfgtbl;
54
55void Shm_Cause_interrupt_pxfl( rtems_unsigned32 node );
56
57void Shm_Get_configuration(
58  rtems_unsigned32   localnode,
59  shm_config_table **shmcfg
60)
61{
62   BSP_shm_cfgtbl.base         = (vol_u32 *) 0x44000000;
63   BSP_shm_cfgtbl.length       = 16 * KILOBYTE;
64   BSP_shm_cfgtbl.format       = SHM_BIG;
65
66   BSP_shm_cfgtbl.cause_intr   = Shm_Cause_interrupt_pxfl;
67
68#ifdef NEUTRAL_BIG
69   BSP_shm_cfgtbl.convert      = NULL_CONVERT;
70#else
71   BSP_shm_cfgtbl.convert      = CPU_swap_u32;
72#endif
73
74#if ( POLLING == 1 )
75   BSP_shm_cfgtbl.poll_intr    = POLLED_MODE;
76   BSP_shm_cfgtbl.Intr.address = NO_INTERRUPT;
77   BSP_shm_cfgtbl.Intr.value   = NO_INTERRUPT;
78   BSP_shm_cfgtbl.Intr.length  = NO_INTERRUPT;
79#else
80   BSP_shm_cfgtbl.poll_intr    = INTR_MODE;
81   BSP_shm_cfgtbl.Intr.address =
82        (vol_u32 *) (HPPA_RUNWAY_HPA( localnode - 1) +
83                     HPPA_RUNWAY_REG_IO_EIR_OFFSET);
84   BSP_shm_cfgtbl.Intr.value   = HPPA_INTERRUPT_EXTERNAL_MPCI;
85   BSP_shm_cfgtbl.Intr.length  = LONG;
86#endif
87
88   *shmcfg = &BSP_shm_cfgtbl;
89}
90
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