source: rtems/c/src/lib/libbsp/sh/gensh1/startup/bspstart.c @ bd9c3d1

4.104.114.84.9
Last change on this file since bd9c3d1 was bd9c3d1, checked in by Joel Sherrill <joel.sherrill@…>, on Apr 15, 1998 at 8:50:31 PM

Numerous changes which in total greatly reduced the amount of source
code in each BSP's bspstart.c. These changes were:

+ confdefs.h now knows libio's semaphore requirements
+ shared/main.c now copies Configuration to BSP_Configuration
+ shared/main.c fills in the Cpu_table with default values

This removed the need for rtems_libio_config() and the constant
BSP_LIBIO_MAX_FDS in every BSP. Plus now the maximum number of open
files can now be set on the gcc command line.

  • Property mode set to 100644
File size: 3.5 KB
Line 
1/*
2 *  This routine starts the application.  It includes application,
3 *  board, and monitor specific initialization and configuration.
4 *  The generic CPU dependent initialization has been performed
5 *  before this routine is invoked.
6 *
7 *  Authors: Ralf Corsepius (corsepiu@faw.uni-ulm.de) and
8 *           Bernd Becker (becker@faw.uni-ulm.de)
9 *
10 *  COPYRIGHT (c) 1997-1998, FAW Ulm, Germany
11 *
12 *  This program is distributed in the hope that it will be useful,
13 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
14 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
15 *
16 *
17 *  COPYRIGHT (c) 1998.
18 *  On-Line Applications Research Corporation (OAR).
19 *  Copyright assigned to U.S. Government, 1994.
20 *
21 *  The license and distribution terms for this file may be
22 *  found in the file LICENSE in this distribution or at
23 *  http://www.OARcorp.com/rtems/license.html.
24 *
25 *  $Id$
26 */
27
28#include <bsp.h>
29#include <rtems/libio.h>
30 
31#include <libcsupport.h>
32 
33#include <string.h>
34 
35/*
36 *  The original table from the application and our copy of it with
37 *  some changes.
38 */
39
40extern rtems_configuration_table Configuration;
41
42rtems_configuration_table  BSP_Configuration;
43
44rtems_cpu_table Cpu_table;
45
46char *rtems_progname;
47
48/*
49 *  Use the shared implementations of the following routines
50 */
51 
52void bsp_postdriver_hook(void);
53void bsp_libc_init( void *, unsigned32, int );
54
55/*
56 *  Function:   bsp_pretasking_hook
57 *
58 *  Description:
59 *      BSP pretasking hook.  Called just before drivers are initialized.
60 *      Used to setup libc and install any BSP extensions.
61 *
62 *  NOTES:
63 *      Must not use libc (to do io) from here, since drivers are
64 *      not yet initialized.
65 *
66 */
67 
68void bsp_pretasking_hook(void)
69{
70    bsp_libc_init(&HeapStart, sizeof(unsigned32) * (&HeapEnd - &HeapStart), 0);
71 
72#ifdef RTEMS_DEBUG
73    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
74#endif
75}
76
77/*
78 *  bsp_start
79 *
80 *  This routine does the bulk of the system initialization.
81 */
82
83void bsp_start(void)
84{
85  /*
86     For real boards you need to setup the hardware
87     and need to copy the vector table from rom to ram.
88
89     Depending on the board this can ether be done from inside the rom
90     startup code, rtems startup code or here.
91   */
92   
93  /*
94   *  Allocate the memory for the RTEMS Work Space.  This can come from
95   *  a variety of places: hard coded address, malloc'ed from outside
96   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
97   *  typically done by stock BSPs) by subtracting the required amount
98   *  of work space from the last physical address on the CPU board.
99   */
100
101  /*
102   *  Need to "allocate" the memory for the RTEMS Workspace and
103   *  tell the RTEMS configuration where it is.  This memory is
104   *  not malloc'ed.  It is just "pulled from the air".
105   */
106
107  BSP_Configuration.work_space_start = (void *) &WorkSpaceStart ;
108  BSP_Configuration.work_space_size  = 
109    (unsigned32) &WorkSpaceEnd - 
110    (unsigned32) &WorkSpaceStart ;
111 
112  /*
113   *  initialize the CPU table for this BSP
114   */
115
116#if ( CPU_ALLOCATE_INTERRUPT_STACK == FALSE )
117  _CPU_Interrupt_stack_low = &CPU_Interrupt_stack_low ;
118  _CPU_Interrupt_stack_high = &CPU_Interrupt_stack_high ;
119
120  /* This isn't used anywhere */
121  Cpu_table.interrupt_stack_size = 
122    (unsigned32) (&CPU_Interrupt_stack_high) -
123    (unsigned32) (&CPU_Interrupt_stack_low) ;
124#endif
125
126
127  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
128  Cpu_table.postdriver_hook = bsp_postdriver_hook;
129
130#if ( CPU_ALLOCATE_INTERRUPT_STACK == TRUE )
131  Cpu_table.interrupt_stack_size = 4096;
132#endif
133
134}
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