source: rtems/bsps/powerpc/virtex4/start/bspstart.c @ 54d87f2

5
Last change on this file since 54d87f2 was 54d87f2, checked in by Sebastian Huber <sebastian.huber@…>, on Sep 4, 2018 at 4:28:57 PM

bsps/powerpc: Simplify ppc_exc_initialize()

Remove parameters from ppc_exc_initialize() since all BSPs passed the
same values.

Update #3459.

  • Property mode set to 100644
File size: 5.9 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
8/*
9 *  Author:     Thomas Doerfler <td@imd.m.isar.de>
10 *              IMD Ingenieurbuero fuer Microcomputertechnik
11 *
12 *  COPYRIGHT (c) 1998 by IMD
13 *
14 *  Changes from IMD are covered by the original distributions terms.
15 *  This file has been derived from the papyrus BSP:
16 *
17 *  Author:     Andrew Bray <andy@i-cubed.co.uk>
18 *
19 *  COPYRIGHT (c) 1995 by i-cubed ltd.
20 *
21 *  To anyone who acknowledges that this file is provided "AS IS"
22 *  without any express or implied warranty:
23 *      permission to use, copy, modify, and distribute this file
24 *      for any purpose is hereby granted without fee, provided that
25 *      the above copyright notice and this notice appears in all
26 *      copies, and that the name of i-cubed limited not be used in
27 *      advertising or publicity pertaining to distribution of the
28 *      software without specific, written prior permission.
29 *      i-cubed limited makes no representations about the suitability
30 *      of this software for any purpose.
31 *
32 *  Modifications for spooling console driver and control of memory layout
33 *  with linker command file by
34 *              Thomas Doerfler <td@imd.m.isar.de>
35 *  for these modifications:
36 *  COPYRIGHT (c) 1997 by IMD, Puchheim, Germany.
37 *
38 *  To anyone who acknowledges that this file is provided "AS IS"
39 *  without any express or implied warranty:
40 *      permission to use, copy, modify, and distribute this file
41 *      for any purpose is hereby granted without fee, provided that
42 *      the above copyright notice and this notice appears in all
43 *      copies. IMD makes no representations about the suitability
44 *      of this software for any purpose.
45 *
46 *  Derived from c/src/lib/libbsp/no_cpu/no_bsp/startup/bspstart.c:
47 *
48 *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
49 *  On-Line Applications Research Corporation (OAR).
50 *
51 *  Modifications for PPC405GP by Dennis Ehlin
52 *  Modifications for Virtex4 by Richard Claus <claus@slac.stanford.edu>
53 */
54#include <rtems.h>
55#include <rtems/config.h>
56#include <rtems/bspIo.h>
57#include <rtems/counter.h>
58#include <rtems/libio.h>
59#include <rtems/libcsupport.h>
60#include <rtems/sysinit.h>
61
62#include <libcpu/cpuIdent.h>
63#include <libcpu/spr.h>
64
65#include <bsp.h>
66#include <bsp/vectors.h>
67#include <bsp/bootcard.h>
68#include <bsp/irq.h>
69
70#include <string.h>
71#include <fcntl.h>
72#include <inttypes.h>
73
74#define DO_DOWN_ALIGN(x,a) ((x) & ~((a)-1))
75
76#define DO_UP_ALIGN(x,a)   DO_DOWN_ALIGN(((x) + (a) - 1 ),a)
77
78#define CPU_DOWN_ALIGN(x)  DO_DOWN_ALIGN(x, CPU_ALIGNMENT)
79#define CPU_UP_ALIGN(x)    DO_UP_ALIGN(x, CPU_ALIGNMENT)
80
81
82/* Defined in linkcmds linker script */
83LINKER_SYMBOL(RamBase);
84LINKER_SYMBOL(RamSize);
85LINKER_SYMBOL(__bsp_ram_start);
86LINKER_SYMBOL(__bsp_ram_end);
87LINKER_SYMBOL(__rtems_end);
88LINKER_SYMBOL(WorkAreaBase);
89LINKER_SYMBOL(MsgAreaBase);
90LINKER_SYMBOL(MsgAreaSize);
91LINKER_SYMBOL(__phy_ram_end);
92LINKER_SYMBOL(bsp_exc_vector_base);
93
94
95/* Expected by clock.c */
96uint32_t    bsp_clicks_per_usec;
97
98
99/*
100 * Provide weak aliases so that RTEMS distribution builds
101 */
102static void _noopfun(void) {}
103
104
105void app_bsp_start(void)
106__attribute__(( weak, alias("_noopfun") ));
107
108void app_bsp_predriver_hook(void)
109__attribute__(( weak, alias("_noopfun") ));
110
111
112static char* bspMsgBuffer = (char*)MsgAreaBase;
113
114static void __bsp_outchar_to_memory(char c)
115{
116  static char* msgBuffer = (char*)MsgAreaBase;
117  *msgBuffer++ = c;
118  if (msgBuffer >= &bspMsgBuffer[(int)MsgAreaSize])  msgBuffer = bspMsgBuffer;
119  *msgBuffer   = 0x00;                /* Overwrite next location to show EOM */
120}
121
122
123void BSP_ask_for_reset(void)
124{
125  printk("\nSystem stopped, issue RESET");
126
127  for(;;);
128}
129
130uint32_t _CPU_Counter_frequency(void)
131{
132  return bsp_clicks_per_usec * 1000000;
133}
134
135/*===================================================================*/
136
137/*
138 *  BSP start routine.  Called by boot_card().
139 *
140 *  This routine does the bulk of the system initialization.
141 */
142void bsp_start(void)
143{
144  ppc_cpu_id_t       myCpu;
145  ppc_cpu_revision_t myCpuRevision;
146
147  /* Set the character output function;  The application may override this */
148  BSP_output_char = __bsp_outchar_to_memory;
149
150  printk("RTEMS %s\n", rtems_get_version_string());
151
152  /*
153   * Get CPU identification dynamically. Note that the get_ppc_cpu_type()
154   * function stores the result in global variables so that it can be used later...
155   */
156  myCpu         = get_ppc_cpu_type();
157  myCpuRevision = get_ppc_cpu_revision();
158  printk("CPU: 0x%04x,  Revision: 0x%04x = %d,  Name: %s\n",
159         myCpu, myCpuRevision, myCpuRevision, get_ppc_cpu_type_name(myCpu));
160
161  /*
162   *  Initialize the device driver parameters
163   */
164
165  /* Timebase register ticks/microsecond;  The application may override these */
166  bsp_clicks_per_usec        = 350;
167
168  ppc_exc_initialize();
169
170  /* Let the user know what parameters we were compiled with */
171  printk("                  Base/Start     End         Size\n"
172         "RAM:              %p                    %p\n"
173         "RTEMS:                           %p\n"
174         "Workspace:        %p             %p\n"
175         "MsgArea:          %p             %p\n"
176         "Physical RAM                     %p\n",
177         RamBase,        RamSize,
178         __rtems_end,
179         WorkAreaBase,   __bsp_ram_end,
180         MsgAreaBase,    MsgAreaSize,
181         __phy_ram_end);
182
183  /*
184   * Initialize RTEMS IRQ system
185   */
186  BSP_rtems_irq_mngt_init(0);
187
188  /* Continue with application-specific initialization */
189  app_bsp_start();
190}
191
192
193/*
194 *  BSP predriver hook.  Called by boot_card() just before drivers are
195 *  initialized.  Clear out any stale interrupts here.
196 */
197static void virtex4_pre_driver_hook(void)
198{
199  app_bsp_predriver_hook();
200}
201
202RTEMS_SYSINIT_ITEM(
203  virtex4_pre_driver_hook,
204  RTEMS_SYSINIT_BSP_PRE_DRIVERS,
205  RTEMS_SYSINIT_ORDER_MIDDLE
206);
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