source: rtems/c/src/lib/libbsp/sh/gensh2/startup/bspstart.c @ 536f5f94

4.104.114.84.95
Last change on this file since 536f5f94 was 536f5f94, checked in by Joel Sherrill <joel.sherrill@…>, on Sep 14, 2002 at 7:39:16 PM

2002-09-14 Joel Sherrill <joel@…>

  • startup/bspstart.c: As part of fixing PR281 on gensh4, a review of all calls to bsp_libc_init() resulted in some cleanup here.
  • Property mode set to 100644
File size: 3.7 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 *
20 *  The license and distribution terms for this file may be
21 *  found in the file LICENSE in this distribution or at
22 *  http://www.OARcorp.com/rtems/license.html.
23 *
24 *  $Id$
25 */
26
27#include <string.h>
28
29#include <bsp.h>
30#include <rtems/libio.h>
31#include <rtems/libcsupport.h>
32 
33/*
34 *  The original table from the application and our copy of it with
35 *  some changes.
36 */
37
38extern void bsp_hw_init(void);
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, (char *)&HeapEnd - (char *)&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#ifndef START_HW_INIT
94  /* board hardware setup here, or from 'start.S' */
95  bsp_hw_init();
96#endif
97
98  /*
99   *  Allocate the memory for the RTEMS Work Space.  This can come from
100   *  a variety of places: hard coded address, malloc'ed from outside
101   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
102   *  typically done by stock BSPs) by subtracting the required amount
103   *  of work space from the last physical address on the CPU board.
104   */
105
106  /*
107   *  Need to "allocate" the memory for the RTEMS Workspace and
108   *  tell the RTEMS configuration where it is.  This memory is
109   *  not malloc'ed.  It is just "pulled from the air".
110   */
111
112  BSP_Configuration.work_space_start = (void *) &WorkSpaceStart ;
113  BSP_Configuration.work_space_size  = 
114    (unsigned32) &WorkSpaceEnd - 
115    (unsigned32) &WorkSpaceStart ;
116 
117  /*
118   *  initialize the CPU table for this BSP
119   */
120
121#if ( CPU_ALLOCATE_INTERRUPT_STACK == FALSE )
122  _CPU_Interrupt_stack_low = &CPU_Interrupt_stack_low ;
123  _CPU_Interrupt_stack_high = &CPU_Interrupt_stack_high ;
124
125  /* This isn't used anywhere */
126  Cpu_table.interrupt_stack_size = 
127    (unsigned32) (&CPU_Interrupt_stack_high) -
128    (unsigned32) (&CPU_Interrupt_stack_low) ;
129#endif
130
131
132  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
133  Cpu_table.postdriver_hook = bsp_postdriver_hook;
134
135#if ( CPU_ALLOCATE_INTERRUPT_STACK == TRUE )
136  Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY;
137#endif
138
139  Cpu_table.clicks_per_second = CPU_CLOCK_RATE_HZ ;
140}
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