source: rtems/c/src/lib/libbsp/bfin/eZKit533/startup/bspstart.c @ 00f13ee

4.104.114.84.95
Last change on this file since 00f13ee was 00f13ee, checked in by Joel Sherrill <joel.sherrill@…>, on May 24, 2007 at 2:23:51 PM

2007-05-24 Alain Schaefer <alani@…>

  • startup/bspstart.c: Fix a problem in the InitEBIU method.
  • Property mode set to 100644
File size: 4.6 KB
Line 
1/*  bspstart.c for eZKit533
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 *  Copyright (c) 2006 by Atos Automacao Industrial Ltda.
9 *             written by Alain Schaefer <alain.schaefer@easc.ch>
10 *                    and Antonio Giovanini <antonio@atos.com.br>
11 *
12 *  The license and distribution terms for this file may be
13 *  found in the file LICENSE in this distribution or at
14 *  http://www.rtems.com/license/LICENSE.
15 *
16 *  $Id$
17 */
18
19
20#include <string.h>
21
22#include <bsp.h>
23#include <rtems/libio.h>
24#include <rtems/libcsupport.h>
25
26
27/*
28 *  The original table from the application and our copy of it with
29 *  some changes.
30 */
31
32extern rtems_configuration_table Configuration;
33
34rtems_configuration_table  BSP_Configuration;
35
36rtems_cpu_table Cpu_table;
37
38char *rtems_progname;
39
40/*
41 *  Use the shared implementations of the following routines
42 */
43
44void bsp_postdriver_hook(void);
45void bsp_libc_init( void *, uint32_t, int );
46void Init_PLL (void);
47void Init_EBIU (void);
48void Init_Flags(void);
49void Init_RTC (void);
50
51void null_isr(void);
52
53/*
54 *  Function:   bsp_pretasking_hook
55 *  Created:    95/03/10
56 *
57 *  Description:
58 *      BSP pretasking hook.  Called just before drivers are initialized.
59 *      Used to setup libc and install any BSP extensions.
60 *
61 *  NOTES:
62 *      Must not use libc (to do io) from here, since drivers are
63 *      not yet initialized.
64 *
65 */
66
67void bsp_pretasking_hook(void)
68{
69    extern int HeapBase;
70    extern int HeapSize;
71    void         *heapStart = &HeapBase;
72    unsigned long heapSize = (unsigned long)&HeapSize;
73
74    bsp_libc_init(heapStart, heapSize, 0);
75
76#ifdef RTEMS_DEBUG
77    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
78#endif
79}
80
81/*
82 *  bsp_start
83 *
84 *  This routine does the bulk of the system initialization.
85 */
86
87void bsp_start( void )
88{
89   
90  extern void          * _WorkspaceBase;
91
92  /* BSP Hardware Initialization*/
93  Init_RTC();   /* Blackfin Real Time Clock initialization */ 
94  Init_PLL();   /* PLL initialization */
95  Init_EBIU();  /* EBIU initialization */
96  Init_Flags(); /* GPIO initialization */
97
98  /*
99   *  Allocate the memory for the RTEMS Work Space.  This can come from
100   *  a variety of places: hard coded address, malloc'ed from outside
101   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
102   *  typically done by stock BSPs) by subtracting the required amount
103   *  of work space from the last physical address on the CPU board.
104   */
105
106  /*
107   *  Need to "allocate" the memory for the RTEMS Workspace and
108   *  tell the RTEMS configuration where it is.  This memory is
109   *  not malloc'ed.  It is just "pulled from the air".
110   */
111
112  BSP_Configuration.work_space_start = (void *) &_WorkspaceBase;
113
114  /*
115   *  initialize the CPU table for this BSP
116   */
117
118  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
119  Cpu_table.postdriver_hook = bsp_postdriver_hook;
120  Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY;
121
122  int i=0;
123  for (i=5;i<16;i++) {
124    set_vector((rtems_isr_entry)null_isr, i, 1);
125  }
126 
127}
128
129 /*
130  * Init_PLL
131  *
132  * Routine to initialize the PLL. The Ezkit uses a 27 Mhz XTAL.
133  * See "../eZKit533/include/bsp.h" for more information.
134  */
135
136void Init_PLL (void)
137{
138 
139  unsigned int n;
140 
141  /* Configure PLL registers */
142  *((uint16_t*)PLL_LOCKCNT) = 0x1000;
143  *((uint16_t*)PLL_DIV) = PLL_CSEL|PLL_SSEL;
144  *((uint16_t*)PLL_CTL) = PLL_MSEL|PLL_DF;
145
146  /* Commands to set PLL values */
147  asm("cli r0;");
148  asm("idle;");
149  asm("sti r0;");
150 
151  /* Delay for PLL stabilization */
152  for (n=0; n<200; n++) {} 
153 
154}
155
156 /*
157  * Init_EBIU
158  *
159  * Configure extern memory
160  */
161
162void Init_EBIU (void)
163{
164  /* Configure FLASH */
165  *((uint32_t*)EBIU_AMBCTL0)  = 0x7bb07bb0L;
166  *((uint32_t*)EBIU_AMBCTL1)  = 0x7bb07bb0L;
167  *((uint16_t*)EBIU_AMGCTL)   = 0x000f;
168 
169  /* Configure SDRAM
170  *((uint32_t*)EBIU_SDGCTL) = 0x0091998d;
171  *((uint16_t*)EBIU_SDBCTL) = 0x0013;
172  *((uint16_t*)EBIU_SDRRC)  = 0x0817;
173  */
174}
175
176 /*
177  * Init_Flags
178  *
179  * Enable LEDs port
180  */
181void Init_Flags(void)
182{
183  *((uint16_t*)FIO_INEN)    = 0x0100;
184  *((uint16_t*)FIO_DIR)     = 0x0000;
185  *((uint16_t*)FIO_EDGE)    = 0x0100;
186  *((uint16_t*)FIO_MASKA_D) = 0x0100;
187 
188  *((uint8_t*)FlashA_PortB_Dir)  = 0x3f;
189  *((uint8_t*)FlashA_PortB_Data) = 0x00;   
190}
191
192/*
193 * Helper Function to use the EzKits LEDS.
194 * Can be used by the Application.
195 */
196void setLED (uint8_t value)
197{
198  *((uint8_t*)FlashA_PortB_Data) = value;   
199}
200
201/*
202 * Helper Function to use the EzKits LEDS
203 */
204uint8_t getLED (void)
205{
206  return *((uint8_t*)FlashA_PortB_Data);
207}
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