source: rtems/c/src/lib/libbsp/powerpc/gen405/startup/bspstart.c @ 07e9642c

4.104.114.9
Last change on this file since 07e9642c was 07e9642c, checked in by Joel Sherrill <joel.sherrill@…>, on Nov 28, 2007 at 9:44:46 PM

2007-11-28 Joel Sherrill <joel.sherrill@…>

  • startup/bspstart.c: Eliminate PowerPC specific elements from the CPU Table. They have been replaced with variables named bsp_XXX as needed.
  • Property mode set to 100644
File size: 6.0 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 *  Modifications for PPC405GP by Dennis Ehlin
55 *
56 *  $Id$
57 */
58
59#include <string.h>
60#include <fcntl.h>
61
62#include <bsp.h>
63#include <rtems/libio.h>
64#include <rtems/libcsupport.h>
65#include <ictrl.h>
66
67/*
68 *  The original table from the application and our copy of it with
69 *  some changes.
70 */
71
72extern rtems_configuration_table Configuration;
73
74rtems_configuration_table  BSP_Configuration;
75
76rtems_cpu_table Cpu_table;
77
78char *rtems_progname;
79void *bsp_ram_end = (void *)RAM_END;  /* first addr behind avail. ram area */
80
81/*
82 *  Driver configuration parameters
83 */
84uint32_t   bsp_serial_per_sec;         /* Serial clocks per second */
85boolean    bsp_serial_external_clock;
86boolean    bsp_serial_xon_xoff;
87boolean    bsp_serial_cts_rts;
88uint32_t   bsp_serial_rate;
89uint32_t   bsp_timer_average_overhead; /* Average overhead of timer in ticks */
90uint32_t   bsp_timer_least_valid;      /* Least valid number from timer      */
91boolean    bsp_timer_internal_clock;   /* TRUE, when timer runs with CPU clk */
92
93/*      Initialize whatever libc we are using
94 *      called from postdriver hook
95 */
96
97void bsp_postdriver_hook(void);
98void bsp_libc_init( void *, uint32_t, int );
99
100/*
101 *
102 *  bsp_predriver_hook
103 *
104 *  Before drivers are setup.
105 */
106
107void bsp_predriver_hook(void)
108{
109  rtems_status_code status;
110  /* init the PPC405 external interrupt controller handler... */
111  status = ictrl_init();
112}
113
114/*
115 *  Function:   bsp_pretasking_hook
116 *  Created:    95/03/10
117 *
118 *  Description:
119 *      BSP pretasking hook.  Called just before drivers are initialized.
120 *      Used to setup libc and install any BSP extensions.
121 *
122 *  NOTES:
123 *      Must not use libc (to do io) from here, since drivers are
124 *      not yet initialized.
125 *
126 */
127
128void bsp_pretasking_hook(void)
129{
130    extern int _end;
131    extern int _heap_end;
132    uint32_t          heap_start;
133    uint32_t        heap_size;
134    uint32_t        heap_end;
135
136    heap_start = (uint32_t  ) &_end;
137    if (heap_start & (CPU_ALIGNMENT-1))
138        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
139
140    heap_end = (uint32_t  ) &_heap_end;
141    if (heap_end & (CPU_ALIGNMENT-1))
142        heap_end = (heap_end + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
143
144    heap_size = heap_end - heap_start;
145
146    bsp_libc_init((void *) heap_start, heap_size, 0); /* 64 * 1024 */
147
148#ifdef RTEMS_DEBUG
149    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
150#endif
151
152}
153
154/*
155 *  bsp_start
156 *
157 *  This routine does the bulk of the system initialization.
158 */
159
160void bsp_start( void )
161{
162  /*
163   *  Allocate the memory for the RTEMS Work Space.  This can come from
164   *  a variety of places: hard coded address, malloc'ed from outside
165   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
166   *  typically done by stock BSPs) by subtracting the required amount
167   *  of work space from the last physical address on the CPU board.
168   */
169
170  /*
171   *  Need to "allocate" the memory for the RTEMS Workspace and
172   *  tell the RTEMS configuration where it is.  This memory is
173   *  not malloc'ed.  It is just "pulled from the air".
174   */
175  /* FIME: plan usage of RAM better:
176     - make top of ram dynamic,
177     - take out some part for persistant log
178     - make rest of ram to heap...
179     -remove RAM_END from bsp.h, this cannot be valid...
180      or must be a function call
181   */
182  BSP_Configuration.work_space_start = (void *)
183      ((char *)(bsp_ram_end)) - BSP_Configuration.work_space_size;
184
185  /*
186   *  initialize the CPU table for this BSP
187   */
188
189  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
190  Cpu_table.predriver_hook  = bsp_predriver_hook;
191  Cpu_table.postdriver_hook = bsp_postdriver_hook;
192  Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY;
193
194  bsp_clicks_per_usec = 300;
195  bsp_serial_per_sec = 14625000;
196  bsp_serial_external_clock = 0;
197  bsp_timer_internal_clock  = 1;
198  bsp_serial_xon_xoff = 0;
199  bsp_serial_cts_rts = 1;
200  bsp_serial_rate = 115200;
201  bsp_timer_average_overhead = 2;
202  bsp_timer_least_valid = 3;
203  bsp_exceptions_in_RAM = TRUE;
204}
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