source: rtems/c/src/lib/libbsp/powerpc/virtex/startup/bspstart.c @ a86f3aac

4.104.114.9
Last change on this file since a86f3aac was a86f3aac, checked in by Thomas Doerfler <Thomas.Doerfler@…>, on Jul 11, 2008 at 10:01:37 AM

adapted powerpc BSPs to new exception code

  • Property mode set to 100644
File size: 6.9 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#warning The interrupt disable mask is now stored in SPRG0, please verify that this is compatible to this BSP (see also bootcard.c).
60
61#include <string.h>
62#include <fcntl.h>
63
64#include <bsp.h>
65#include <rtems/libio.h>
66#include <rtems/libcsupport.h>
67#include <bsp/irq.h>
68#include <rtems/bspIo.h>
69#include <libcpu/cpuIdent.h>
70#include <libcpu/spr.h>
71#include <rtems/powerpc/powerpc.h>
72
73SPR_RW(SPRG1)
74
75#include RTEMS_XPARAMETERS_H
76#include <stdio.h>
77
78uint32_t _heap_start;
79uint32_t _heap_end;
80uint32_t _top_of_ram;
81
82/*
83 *  Driver configuration parameters
84 */
85uint32_t   bsp_clicks_per_usec;
86uint32_t   bsp_serial_per_sec;         /* Serial clocks per second */
87boolean    bsp_serial_external_clock;
88boolean    bsp_serial_xon_xoff;
89boolean    bsp_serial_cts_rts;
90uint32_t   bsp_serial_rate;
91uint32_t   bsp_timer_average_overhead; /* Average overhead of timer in ticks */
92uint32_t   bsp_timer_least_valid;      /* Least valid number from timer      */
93boolean    bsp_timer_internal_clock;   /* TRUE, when timer runs with CPU clk */
94
95
96/*      Initialize whatever libc we are using
97 *      called from postdriver hook
98 */
99
100void bsp_XAssertHandler(const char* file, int line);
101void bsp_libc_init( void *, uint32_t, int );
102
103
104void bsp_XAssertHandler(const char* file, int line) {
105  printf("\n***\n*** XAssert Failed!  File: %s, Line: %d\n***\n", file, line);
106}
107
108/*
109 *  Function:   bsp_pretasking_hook
110 *  Created:    95/03/10
111 *
112 *  Description:
113 *      BSP pretasking hook.  Called just before drivers are initialized.
114 *      Used to setup libc and install any BSP extensions.
115 *
116 *  NOTES:
117 *      Must not use libc (to do io) from here, since drivers are
118 *      not yet initialized.
119 *
120 */
121
122void bsp_pretasking_hook(void)
123{
124
125
126    uint32_t        heap_start;
127    uint32_t        heap_size;
128    uint32_t        heap_end;
129
130    /* round up from the top of workspace to next 64k boundary, get
131     * default heapsize from linker script  */
132    heap_start = (((uint32_t)Configuration.work_space_start +
133                   rtems_configuration_get_work_space_size()) + 0x18000) & 0xffff0000;
134
135    heap_end = _heap_start + (uint32_t)&_HeapSize;
136
137    heap_size = (heap_end - heap_start);
138
139    _heap_start = heap_start;
140    _heap_end = heap_end;
141
142    _top_of_ram = heap_end;
143
144    bsp_libc_init((void *) heap_start, heap_size, 0); /* 64 * 1024 */
145
146}
147
148/*
149 *  bsp_start
150 *
151 *  This routine does the bulk of the system initialization.
152 */
153
154
155void bsp_start( void )
156{
157  extern unsigned long *intrStackPtr;
158  register unsigned char* intrStack;
159  ppc_cpu_id_t myCpu;
160  ppc_cpu_revision_t myCpuRevision;
161
162  /*
163   * Get CPU identification dynamically. Note that the get_ppc_cpu_type()
164   * function store the result in global variables
165   * so that it can be used latter...
166   */
167  myCpu             = get_ppc_cpu_type();
168  myCpuRevision = get_ppc_cpu_revision();
169
170  /*
171   *  initialize the device driver parameters
172   */
173
174  /* timebase register ticks/microsecond */
175  bsp_clicks_per_usec = (250000000 / 1000000);
176  bsp_serial_per_sec = 14625000;
177  bsp_serial_external_clock = 0;
178  bsp_timer_internal_clock  = 1;
179  bsp_serial_xon_xoff = 0;
180  bsp_serial_cts_rts = 0;
181  bsp_serial_rate = 115200;
182  bsp_timer_average_overhead = 2;
183  bsp_timer_least_valid = 3;
184
185  /*
186   * Initialize some SPRG registers related to irq handling
187   */
188
189  intrStack = (((unsigned char*)&intrStackPtr) - PPC_MINIMUM_STACK_FRAME_SIZE);
190  _write_SPRG1((unsigned int)intrStack);
191
192  /*
193   * Initialize default raw exception handlers.
194   * See shared/vectors/vectors_init.c
195   */
196  initialize_exceptions();
197
198  /*
199   * Install our own set of exception vectors
200   */
201  BSP_rtems_irq_mng_init(0);
202
203  /*
204   *  Allocate the memory for the RTEMS Work Space.  This can come from
205   *  a variety of places: hard coded address, malloc'ed from outside
206   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
207   *  typically done by stock BSPs) by subtracting the required amount
208   *  of work space from the last physical address on the CPU board.
209   */
210
211  /*
212   *  Need to "allocate" the memory for the RTEMS Workspace and
213   *  tell the RTEMS configuration where it is.  This memory is
214   *  not malloc'ed.  It is just "pulled from the air".
215   */
216  /* FIME: plan usage of RAM better:
217     - make top of ram dynamic,
218     - make rest of ram to heap...
219     -remove RAM_END from bsp.h, this cannot be valid...
220      or must be a function call
221   */
222  {
223    extern int _end;
224
225    /* round _end up to next 64k boundary for start of workspace */
226    Configuration.work_space_start = (void *)((((uint32_t)&_end) + 0x18000) & 0xffff0000);
227  }
228
229}
230
231void BSP_ask_for_reset(void)
232{
233  printk("system stopped, press RESET");
234  while(1) {};
235}
236
237void BSP_panic(char *s)
238{
239  printk("%s PANIC %s\n",_RTEMS_version, s);
240  BSP_ask_for_reset();
241}
242
243void _BSP_Fatal_error(unsigned int v)
244{
245  printk("%s PANIC ERROR %x\n",_RTEMS_version, v);
246  BSP_ask_for_reset();
247}
248 
Note: See TracBrowser for help on using the repository browser.