source: rtems/c/src/lib/libbsp/arm/arm_bare_bsp/startup/bspstart.c @ f1c62bb

4.104.114.84.95
Last change on this file since f1c62bb was eba2e4f, checked in by Joel Sherrill <joel.sherrill@…>, on Nov 1, 2000 at 9:19:23 PM

2000-11-01 Joel Sherrill <joel@…>

  • startup/bspstart.c: assoc.h, error.h, libio_.h, libio.h, and libcsupport.h moved from libc to lib/include/rtems and now must be referenced as <rtems/XXX.h>. Header file order was cleaned up while doing this.
  • Property mode set to 100644
File size: 5.8 KB
Line 
1/*-------------------------------------------------------------------------+
2| This file contains the ARM BSP startup package. It includes application,
3| board, and monitor specific initialization and configuration. The generic CPU
4| dependent initialization has been performed before this routine is invoked.
5+--------------------------------------------------------------------------+
6|
7| Copyright (c) 2000 Canon Research Centre France SA.
8| Emmanuel Raguet, mailto:raguet@crf.canon.fr
9|
10|   The license and distribution terms for this file may be
11|   found in found in the file LICENSE in this distribution or at
12|   http://www.OARcorp.com/rtems/license.html.
13|
14+--------------------------------------------------------------------------*/
15
16
17#include <bsp.h>
18#include <rtems/libcsupport.h>
19#include <rtems/libio.h>
20
21#include <uart.h>
22
23/*-------------------------------------------------------------------------+
24| Global Variables
25+--------------------------------------------------------------------------*/
26
27/*
28 * must be initialized with the right address
29 */
30volatile unsigned long *Regs = (unsigned long*)0xdeadbeef; /* Chip registers */
31
32extern rtems_unsigned32 _end;         /* End of BSS. Defined in 'linkcmds'. */
33/*
34 * Size of heap if it is 0 it will be dynamically defined by memory size,
35 * otherwise the value should be changed by binary patch
36 */
37rtems_unsigned32 _heap_size = 0; 
38
39/* Size of stack used during initialization. Defined in 'start.s'.  */
40extern rtems_unsigned32 _stack_size;
41
42rtems_unsigned32 rtemsFreeMemStart;
43                         /* Address of start of free memory - should be updated
44                            after creating new partitions or regions.         */
45
46/* The original BSP configuration table from the application and our copy of it
47   with some changes. */
48
49extern rtems_configuration_table  Configuration;
50       rtems_configuration_table  BSP_Configuration;
51
52rtems_cpu_table Cpu_table;                     /* CPU configuration table.    */
53char            *rtems_progname;               /* Program name - from main(). */
54
55/*-------------------------------------------------------------------------+
56| External Prototypes
57+--------------------------------------------------------------------------*/
58extern void rtems_irq_mngt_init(void);
59void bsp_libc_init( void *, unsigned32, int );
60void bsp_postdriver_hook(void);
61
62/*-------------------------------------------------------------------------+
63|         Function: bsp_pretasking_hook
64|      Description: BSP pretasking hook.  Called just before drivers are
65|                   initialized. Used to setup libc and install any BSP
66|                   extensions. NOTE: Must not use libc (to do io) from here,
67|                   since drivers are not yet initialized.
68| Global Variables: None.
69|        Arguments: None.
70|          Returns: Nothing.
71+--------------------------------------------------------------------------*/
72void bsp_pretasking_hook(void)
73{
74
75  if(_heap_size == 0)
76    {
77      _heap_size = 0x420000 - rtemsFreeMemStart;
78    }
79       
80  bsp_libc_init((void *)rtemsFreeMemStart, _heap_size, 0);
81 
82  rtemsFreeMemStart += _heap_size;           /* HEAP_SIZE  in KBytes */
83
84
85#ifdef RTEMS_DEBUG
86
87  rtems_debug_enable(RTEMS_DEBUG_ALL_MASK);
88
89#endif /* RTEMS_DEBUG */
90
91} /* bsp_pretasking_hook */
92 
93
94/*-------------------------------------------------------------------------+
95|         Function: bsp_start
96|      Description: Called before main is invoked.
97| Global Variables: None.
98|        Arguments: None.
99|          Returns: Nothing.
100+--------------------------------------------------------------------------*/
101void bsp_start_default( void )
102{
103  rtemsFreeMemStart = (rtems_unsigned32)(&_end);  /* &_end+_stack_size;*/
104                                    /* set the value of start of free memory. */
105
106  /* If we don't have command line arguments set default program name. */
107
108  Cpu_table.pretasking_hook         = bsp_pretasking_hook; /* init libc, etc. */
109  Cpu_table.predriver_hook          = NULL;                /* use system's    */
110  Cpu_table.postdriver_hook         = bsp_postdriver_hook;
111  Cpu_table.idle_task               = NULL;
112                                          /* do not override system IDLE task */
113  Cpu_table.do_zero_of_workspace    = TRUE;
114  Cpu_table.interrupt_stack_size    = 4096;
115  Cpu_table.extra_mpci_receive_server_stack = 0;
116
117  /* Place RTEMS workspace at beginning of free memory. */
118  BSP_Configuration.work_space_start = (void *)rtemsFreeMemStart;
119 
120   rtemsFreeMemStart += BSP_Configuration.work_space_size;
121
122  /*
123   * Init rtems exceptions management
124   */
125  rtems_exception_init_mngt();
126
127  /*
128   * Init rtems interrupt management
129   */
130  rtems_irq_mngt_init();
131
132  /*
133   *  The following information is very useful when debugging.
134   */
135
136#if 0
137  printk( "work_space_size = 0x%x\n", BSP_Configuration.work_space_size );
138  printk( "maximum_extensions = 0x%x\n", BSP_Configuration.maximum_extensions );
139  printk( "microseconds_per_tick = 0x%x\n",
140     BSP_Configuration.microseconds_per_tick );
141  printk( "ticks_per_timeslice = 0x%x\n",
142     BSP_Configuration.ticks_per_timeslice );
143  printk( "maximum_devices = 0x%x\n", BSP_Configuration.maximum_devices );
144  printk( "number_of_device_drivers = 0x%x\n",
145     BSP_Configuration.number_of_device_drivers );
146  printk( "Device_driver_table = 0x%x\n",
147     BSP_Configuration.Device_driver_table );
148
149  printk( "_heap_size = 0x%x\n", _heap_size );
150  /*  printk( "_stack_size = 0x%x\n", _stack_size );*/
151  printk( "rtemsFreeMemStart = 0x%x\n", rtemsFreeMemStart );
152  printk( "work_space_start = 0x%x\n", BSP_Configuration.work_space_start );
153  printk( "work_space_size = 0x%x\n", BSP_Configuration.work_space_size );
154#endif
155
156} /* bsp_start */
157
158/*
159 *  By making this a weak alias for bsp_start_default, a brave soul
160 *  can override the actual bsp_start routine used.
161 */
162
163void bsp_start (void) __attribute__ ((weak, alias("bsp_start_default")));
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