source: rtems/bsps/powerpc/ss555/start/bspstart.c @ ff081aee

Last change on this file since ff081aee was ff081aee, checked in by Sebastian Huber <sebastian.huber@…>, on Nov 6, 2018 at 3:58:02 PM

score: Rename interrupt stack symbols

Rename

  • _Configuration_Interrupt_stack_area_begin in _ISR_Stack_area_begin,
  • _Configuration_Interrupt_stack_area_end in _ISR_Stack_area_end, and
  • _Configuration_Interrupt_stack_size in _ISR_Stack_size.

Move definitions to <rtems/score/isr.h>. The new names are considerable
shorter and in the right namespace.

Update #3459.

  • Property mode set to 100644
File size: 2.5 KB
Line 
1/*
2 *  This routine does the bulk of the system initialization.
3 */
4
5/*
6 *  COPYRIGHT (c) 1989-2007.
7 *  On-Line Applications Research Corporation (OAR).
8 *
9 *  The license and distribution terms for this file may be
10 *  found in the file LICENSE in this distribution or at
11 *  http://www.rtems.org/license/LICENSE.
12 *
13 *  SS555 port sponsored by Defence Research and Development Canada - Suffield
14 *  Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca)
15 *
16 *  Derived from c/src/lib/libbsp/powerpc/mbx8xx/startup/bspstart.c:
17 *
18 *  Modifications for MBX860:
19 *  Copyright (c) 1999, National Research Council of Canada
20 */
21
22#include <rtems/bspIo.h>
23#include <rtems/counter.h>
24#include <bsp/bootcard.h>
25#include <rtems/powerpc/powerpc.h>
26
27#include <libcpu/cpuIdent.h>
28#include <libcpu/spr.h>
29
30#include <bsp/irq.h>
31#include <bsp.h>
32
33SPR_RW(SPRG1)
34
35/*
36 *  Driver configuration parameters
37 */
38uint32_t   bsp_clicks_per_usec;
39uint32_t   bsp_clock_speed;            /* Serial clocks per second */
40
41uint32_t _CPU_Counter_frequency(void)
42{
43  return BSP_CRYSTAL_HZ / 4;
44}
45
46/*
47 *  bsp_start()
48 *
49 *  Board-specific initialization code. Called from the generic boot_card()
50 *  function defined in rtems/c/src/lib/libbsp/shared/main.c. That function
51 *  does some of the board independent initialization. It is called from the
52 *  SS555 entry point _start() defined in
53 *  rtems/c/src/lib/libbsp/powerpc/ss555/start/start.S
54 *
55 *  _start() has set up a stack, has zeroed the .bss section, has set up the
56 *  .data section from contents stored in ROM, has turned off interrupts,
57 *  and placed the processor in the supervisor mode.  boot_card() has left
58 *  the processor in that state when bsp_start() was called.
59 *
60 *  Input parameters: NONE
61 *
62 *  Output parameters: NONE
63 *
64 *  Return values: NONE
65 */
66void bsp_start(void)
67{
68  char* intrStack;
69
70  /*
71   * Get CPU identification dynamically.  Note that the get_ppc_cpu_type()
72   * function stores the result in global variables so that it can be used
73   * later.
74   */
75  get_ppc_cpu_type();
76  get_ppc_cpu_revision();
77
78  /*
79   * Initialize some SPRG registers related to irq handling
80   */
81  intrStack = (char *)_ISR_Stack_area_end -
82     PPC_MINIMUM_STACK_FRAME_SIZE;
83  _write_SPRG1((unsigned int)intrStack);
84
85  /*
86   * Install our own set of exception vectors
87   */
88  initialize_exceptions();
89
90  /*
91   *  initialize the device driver parameters
92   */
93  bsp_clicks_per_usec = BSP_CRYSTAL_HZ / 4 / 1000000;
94  bsp_clock_speed     = BSP_CLOCK_HZ;   /* for SCI baud rate generator */
95
96  /*
97   * Initalize RTEMS IRQ system
98   */
99  BSP_rtems_irq_mng_init(0);
100}
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