source: rtems/c/src/lib/libbsp/powerpc/helas403/startup/bspstart.c @ d11d1d2a

4.104.114.95
Last change on this file since d11d1d2a was d11d1d2a, checked in by Joel Sherrill <joel.sherrill@…>, on 12/11/07 at 15:46:53

2007-12-11 Joel Sherrill <joel.sherrill@…>

  • README, include/bsp.h, startup/bspstart.c: Eliminate copies of the Configuration Table. Use the RTEMS provided accessor macros to obtain configuration fields.
  • Property mode set to 100644
File size: 5.3 KB
Line 
1/*  bsp_start()
2 *
3 *  This routine starts the application.  It includes application,
4 *  board, and monitor specific initialization and configuration.
5 *  The generic CPU dependent initialization has been performed
6 *  before this routine is invoked.
7 *
8 *  INPUT:  NONE
9 *
10 *  OUTPUT: NONE
11 *
12 *  Author:     Thomas Doerfler <td@imd.m.isar.de>
13 *              IMD Ingenieurbuero fuer Microcomputertechnik
14 *
15 *  COPYRIGHT (c) 1998 by IMD
16 *
17 *  Changes from IMD are covered by the original distributions terms.
18 *  This file has been derived from the papyrus BSP:
19 *
20 *  Author:     Andrew Bray <andy@i-cubed.co.uk>
21 *
22 *  COPYRIGHT (c) 1995 by i-cubed ltd.
23 *
24 *  To anyone who acknowledges that this file is provided "AS IS"
25 *  without any express or implied warranty:
26 *      permission to use, copy, modify, and distribute this file
27 *      for any purpose is hereby granted without fee, provided that
28 *      the above copyright notice and this notice appears in all
29 *      copies, and that the name of i-cubed limited not be used in
30 *      advertising or publicity pertaining to distribution of the
31 *      software without specific, written prior permission.
32 *      i-cubed limited makes no representations about the suitability
33 *      of this software for any purpose.
34 *
35 *  Modifications for spooling console driver and control of memory layout
36 *  with linker command file by
37 *              Thomas Doerfler <td@imd.m.isar.de>
38 *  for these modifications:
39 *  COPYRIGHT (c) 1997 by IMD, Puchheim, Germany.
40 *
41 *  To anyone who acknowledges that this file is provided "AS IS"
42 *  without any express or implied warranty:
43 *      permission to use, copy, modify, and distribute this file
44 *      for any purpose is hereby granted without fee, provided that
45 *      the above copyright notice and this notice appears in all
46 *      copies. IMD makes no representations about the suitability
47 *      of this software for any purpose.
48 *
49 *  Derived from c/src/lib/libbsp/no_cpu/no_bsp/startup/bspstart.c:
50 *
51 *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
52 *  On-Line Applications Research Corporation (OAR).
53 *
54 *  $Id$
55 */
56
57#include <string.h>
58#include <fcntl.h>
59
60#include <bsp.h>
61#include <rtems/libio.h>
62#include <rtems/libcsupport.h>
63#include <ictrl.h>
64
65void *bsp_ram_end = (void *)RAM_END;  /* first addr behind avail. ram area */
66
67/*
68 *  Driver configuration parameters
69 */
70uint32_t   bsp_clicks_per_usec;
71uint32_t   bsp_serial_per_sec;         /* Serial clocks per second */
72boolean    bsp_serial_external_clock;
73boolean    bsp_serial_xon_xoff;
74boolean    bsp_serial_cts_rts;
75uint32_t   bsp_serial_rate;
76uint32_t   bsp_timer_average_overhead; /* Average overhead of timer in ticks */
77uint32_t   bsp_timer_least_valid;      /* Least valid number from timer      */
78boolean    bsp_timer_internal_clock;   /* TRUE, when timer runs with CPU clk */
79void     (*bsp_spurious_handler)(uint32_t   vector, CPU_Interrupt_frame *);
80
81/*      Initialize whatever libc we are using
82 *      called from postdriver hook
83 */
84
85void bsp_postdriver_hook(void);
86void bsp_libc_init( void *, uint32_t, int );
87
88/*
89 *
90 *  bsp_predriver_hook
91 *
92 *  Before drivers are setup.
93 */
94
95void bsp_predriver_hook(void)
96{
97  rtems_status_code status;
98  /* init the PPC403GA external interrupt controller handler... */
99  status = ictrl_init();
100}
101
102/*
103 *  Function:   bsp_pretasking_hook
104 *  Created:    95/03/10
105 *
106 *  Description:
107 *      BSP pretasking hook.  Called just before drivers are initialized.
108 *      Used to setup libc and install any BSP extensions.
109 *
110 *  NOTES:
111 *      Must not use libc (to do io) from here, since drivers are
112 *      not yet initialized.
113 *
114 */
115
116void bsp_pretasking_hook(void)
117{
118    extern int _end;
119    uint32_t          heap_start;
120
121    heap_start = (uint32_t) &_end;
122    if (heap_start & (CPU_ALIGNMENT-1))
123        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
124
125    bsp_libc_init((void *) heap_start, 64 * 1024, 0);
126
127#ifdef RTEMS_DEBUG
128    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
129#endif
130}
131
132/*
133 *  bsp_start
134 *
135 *  This routine does the bulk of the system initialization.
136 */
137
138void bsp_start( void )
139{
140  /*
141   *  Allocate the memory for the RTEMS Work Space.  This can come from
142   *  a variety of places: hard coded address, malloc'ed from outside
143   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
144   *  typically done by stock BSPs) by subtracting the required amount
145   *  of work space from the last physical address on the CPU board.
146   */
147
148  /*
149   *  Need to "allocate" the memory for the RTEMS Workspace and
150   *  tell the RTEMS configuration where it is.  This memory is
151   *  not malloc'ed.  It is just "pulled from the air".
152   */
153  /* FIME: plan usage of RAM better:
154     - make top of ram dynamic,
155     - take out some part for persistant log
156     - make rest of ram to heap...
157     -remove RAM_END from bsp.h, this cannot be valid...
158      or must be a function call
159   */
160  Configuration.work_space_start = (void *)
161      ((char *)(bsp_ram_end)) - rtems_configuration_get_work_space_size();
162
163  /*
164   *  initialize the device driver parameters
165   */
166  bsp_clicks_per_usec = 25;
167  bsp_serial_per_sec = 25000000;
168  bsp_serial_external_clock = 0;
169  bsp_timer_internal_clock  = 1;
170  bsp_serial_xon_xoff = 0;
171  bsp_serial_cts_rts = 1;
172  bsp_serial_rate = 9600;
173  bsp_timer_average_overhead = 2;
174  bsp_timer_least_valid = 3;
175}
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