source: rtems/bsps/powerpc/virtex5/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: 6.3 KB
Line 
1/*
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
9/*
10 *  Author:     Thomas Doerfler <td@imd.m.isar.de>
11 *              IMD Ingenieurbuero fuer Microcomputertechnik
12 *
13 *  COPYRIGHT (c) 1998 by IMD
14 *
15 *  Changes from IMD are covered by the original distributions terms.
16 *  This file has been derived from the papyrus BSP:
17 *
18 *  Author:     Andrew Bray <andy@i-cubed.co.uk>
19 *
20 *  COPYRIGHT (c) 1995 by i-cubed ltd.
21 *
22 *  To anyone who acknowledges that this file is provided "AS IS"
23 *  without any express or implied warranty:
24 *      permission to use, copy, modify, and distribute this file
25 *      for any purpose is hereby granted without fee, provided that
26 *      the above copyright notice and this notice appears in all
27 *      copies, and that the name of i-cubed limited not be used in
28 *      advertising or publicity pertaining to distribution of the
29 *      software without specific, written prior permission.
30 *      i-cubed limited makes no representations about the suitability
31 *      of this software for any purpose.
32 *
33 *  Modifications for spooling console driver and control of memory layout
34 *  with linker command file by
35 *              Thomas Doerfler <td@imd.m.isar.de>
36 *  for these modifications:
37 *  COPYRIGHT (c) 1997 by IMD, Puchheim, Germany.
38 *
39 *  To anyone who acknowledges that this file is provided "AS IS"
40 *  without any express or implied warranty:
41 *      permission to use, copy, modify, and distribute this file
42 *      for any purpose is hereby granted without fee, provided that
43 *      the above copyright notice and this notice appears in all
44 *      copies. IMD makes no representations about the suitability
45 *      of this software for any purpose.
46 *
47 *  Derived from c/src/lib/libbsp/no_cpu/no_bsp/startup/bspstart.c:
48 *
49 *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
50 *  On-Line Applications Research Corporation (OAR).
51 *
52 *  Modifications for PPC405GP by Dennis Ehlin
53 *  Modifications for Virtex5 by Richard Claus <claus@slac.stanford.edu>
54 */
55#include <rtems.h>
56#include <rtems/config.h>
57#include <rtems/bspIo.h>
58#include <rtems/counter.h>
59#include <rtems/libio.h>
60#include <rtems/libcsupport.h>
61#include <rtems/sysinit.h>
62
63#include <libcpu/cpuIdent.h>
64#include <libcpu/spr.h>
65
66#include <bsp.h>
67#include <bsp/vectors.h>
68#include <bsp/bootcard.h>
69#include <bsp/irq.h>
70
71#include <string.h>
72#include <fcntl.h>
73#include <inttypes.h>
74
75#define DO_DOWN_ALIGN(x,a) ((x) & ~((a)-1))
76
77#define DO_UP_ALIGN(x,a)   DO_DOWN_ALIGN(((x) + (a) - 1 ),a)
78
79#define CPU_DOWN_ALIGN(x)  DO_DOWN_ALIGN(x, CPU_ALIGNMENT)
80#define CPU_UP_ALIGN(x)    DO_UP_ALIGN(x, CPU_ALIGNMENT)
81
82
83/* Defined in linkcmds linker script */
84LINKER_SYMBOL(RamBase);
85LINKER_SYMBOL(RamSize);
86LINKER_SYMBOL(__bsp_ram_start);
87LINKER_SYMBOL(__bsp_ram_end);
88LINKER_SYMBOL(__rtems_end);
89LINKER_SYMBOL(WorkAreaBase);
90LINKER_SYMBOL(MsgAreaBase);
91LINKER_SYMBOL(MsgAreaSize);
92LINKER_SYMBOL(__phy_ram_end);
93LINKER_SYMBOL(bsp_exc_vector_base);
94
95
96/* Expected by clock.c */
97uint32_t    bsp_clicks_per_usec;
98
99/*
100 * Bus Frequency
101 */
102unsigned int BSP_bus_frequency;
103/*
104 * processor clock frequency
105 */
106unsigned int BSP_processor_frequency;
107
108/*
109 * Time base divisior (bus freq / TB clock)
110 */
111unsigned int BSP_time_base_divisor;
112
113/*
114 * Provide weak aliases so that RTEMS distribution builds
115 */
116static void _noopfun(void) {}
117
118
119void app_bsp_start(void)
120__attribute__(( weak, alias("_noopfun") ));
121
122void app_bsp_predriver_hook(void)
123__attribute__(( weak, alias("_noopfun") ));
124
125
126static char* bspMsgBuffer = (char*)MsgAreaBase;
127
128static void __bsp_outchar_to_memory(char c)
129{
130  static char* msgBuffer = (char*)MsgAreaBase;
131  *msgBuffer++ = c;
132  if (msgBuffer >= &bspMsgBuffer[(int)MsgAreaSize])  msgBuffer = bspMsgBuffer;
133  *msgBuffer   = 0x00;                /* Overwrite next location to show EOM */
134}
135
136
137void BSP_ask_for_reset(void)
138{
139  printk("\nSystem stopped, issue RESET");
140
141  for(;;);
142}
143
144uint32_t _CPU_Counter_frequency(void)
145{
146  return BSP_bus_frequency / (BSP_time_base_divisor / 1000);
147}
148
149/*===================================================================*/
150
151/*
152 *  BSP start routine.  Called by boot_card().
153 *
154 *  This routine does the bulk of the system initialization.
155 */
156void bsp_start(void)
157{
158  ppc_cpu_id_t       myCpu;
159  ppc_cpu_revision_t myCpuRevision;
160
161  /* Set the character output function;  The application may override this */
162  BSP_output_char = __bsp_outchar_to_memory;
163
164  printk("RTEMS %s\n", rtems_get_version_string());
165
166  /*
167   * Get CPU identification dynamically. Note that the get_ppc_cpu_type()
168   * function stores the result in global variables so that it can be used later...
169   */
170  myCpu         = get_ppc_cpu_type();
171  myCpuRevision = get_ppc_cpu_revision();
172  printk("CPU: 0x%04x,  Revision: 0x%04x = %d,  Name: %s\n",
173         myCpu, myCpuRevision, myCpuRevision, get_ppc_cpu_type_name(myCpu));
174
175  /*
176   *  Initialize the device driver parameters
177   */
178
179  /* For mpc6xx clock driver: */
180  BSP_bus_frequency       = 465000000;
181  BSP_processor_frequency = 465000000;  /* Measured with a DPM 440 2012/8/13 */
182  BSP_time_base_divisor   = 1000;
183
184  /* Timebase register ticks/microsecond;  The application may override these */
185  bsp_clicks_per_usec        = BSP_bus_frequency/(BSP_time_base_divisor * 1000);
186
187  ppc_exc_initialize();
188
189  /* Let the user know what parameters we were compiled with */
190  printk("                  Base/Start     End         Size\n"
191         "RAM:              %p                    %p\n"
192         "RTEMS:                           %p\n"
193         "Workspace:        %p             %p\n"
194         "MsgArea:          %p             %p\n"
195         "Physical RAM                     %p\n",
196         RamBase,        RamSize,
197         __rtems_end,
198         WorkAreaBase,   __bsp_ram_end,
199         MsgAreaBase,    MsgAreaSize,
200         __phy_ram_end);
201
202  /*
203   * Initialize RTEMS IRQ system
204   */
205  BSP_rtems_irq_mngt_init(0);
206
207  /* Continue with application-specific initialization */
208  app_bsp_start();
209}
210
211
212/*
213 *  BSP predriver hook.  Called by boot_card() just before drivers are
214 *  initialized.  Clear out any stale interrupts here.
215 */
216static void virtex5_pre_driver_hook(void)
217{
218  app_bsp_predriver_hook();
219}
220
221RTEMS_SYSINIT_ITEM(
222  virtex5_pre_driver_hook,
223  RTEMS_SYSINIT_BSP_PRE_DRIVERS,
224  RTEMS_SYSINIT_ORDER_MIDDLE
225);
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