summaryrefslogtreecommitdiffstats
path: root/c/src/lib/libbsp/powerpc/eth_comm/startup/bspstart.c
blob: 5832ee1307f754f0d860976e2c13263f4f6f334e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
/*  bsp_start()
 *
 *  This routine starts the application.  It includes application,
 *  board, and monitor specific initialization and configuration.
 *  The generic CPU dependent initialization has been performed
 *  before this routine is invoked.
 *
 *  The MPC860 specific stuff was written by Jay Monkman (jmonkman@frasca.com)
 *
 *  COPYRIGHT (c) 1989-1999.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.OARcorp.com/rtems/license.html.
 *
 *  $Id$
 */

#include <string.h>

#include <bsp.h>
#include <bsp/irq.h>
#include <rtems/libio.h>
#include <rtems/libcsupport.h>
#include <info.h>
#include <libcpu/cpuIdent.h>
#include <rtems/bspIo.h>

boardinfo_t M860_binfo;

/*
 *  The original table from the application and our copy of it with
 *  some changes.
 */
extern rtems_configuration_table Configuration;
extern unsigned long intrStackPtr;
rtems_configuration_table  BSP_Configuration;

rtems_cpu_table Cpu_table;

char *rtems_progname;

/*
 *  Use the shared implementations of the following routines
 */
void bsp_postdriver_hook(void);
void bsp_libc_init( void *, unsigned32, int );

void BSP_panic(char *s)
{
  printk("%s PANIC %s\n",_RTEMS_version, s);
  __asm__ __volatile ("sc"); 
}

void _BSP_Fatal_error(unsigned int v)
{
  printk("%s PANIC ERROR %x\n",_RTEMS_version, v);
  __asm__ __volatile ("sc"); 
}

/*
 *  Function:   bsp_pretasking_hook
 *  Created:    95/03/10
 *
 *  Description:
 *      BSP pretasking hook.  Called just before drivers are initialized.
 *      Used to setup libc and install any BSP extensions.
 *
 *  NOTES:
 *      Must not use libc (to do io) from here, since drivers are
 *      not yet initialized.
 *
 */
 
void
bsp_pretasking_hook(void)
{
  extern int       _end;
  rtems_unsigned32  heap_start;

  /* 
   * Let's check to see if the size of M860_binfo is what
   * it should be. It might not be if the info.h files
   * for RTEMS and the bootloader define boardinfo_t
   * differently.
   */

  /* Oops. printf() won't work yet, since the console is not initialized.
     I should probably find some way of doing this though.
  if (M860_binfo.size != sizeof(boardinfo_t)) {
      printf("The size of the Board Info Block appears to be incorrect.\n");
      printf(" This could occur if the 'info.h' files for RTEMS and the\n");
      printf(" bootloader differ in their definition of boardinfo_t\n");
  }
  */
  heap_start = (rtems_unsigned32) &_end;

  /* Align the heap on a natural boundary (4 bytes?) */
  if (heap_start & (CPU_ALIGNMENT-1)) {
    heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
  }
  /* set up a 256K heap */
  bsp_libc_init((void *) heap_start, 256 * 1024, 0);
  
#ifdef RTEMS_DEBUG
  rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
#endif
}


void bsp_start(void)
{
  extern int _end;
  rtems_unsigned32  heap_start;
  rtems_unsigned32  ws_start;
  ppc_cpu_id_t myCpu;
  ppc_cpu_revision_t myCpuRevision;
  register unsigned char* intrStack;
  register unsigned int intrNestingLevel = 0;
  extern void cpu_init(void);
   
  /*
   * Get CPU identification dynamically. Note that the get_ppc_cpu_type() function
   * store the result in global variables so that it can be used latter...
   */
  myCpu 	= get_ppc_cpu_type();
  myCpuRevision = get_ppc_cpu_revision();

  cpu_init();
  mmu_init();
  /*
   * Initialize some SPRG registers related to irq handling
   */
   
  intrStack = (((unsigned char*)&intrStackPtr) - CPU_MINIMUM_STACK_FRAME_SIZE);
  asm volatile ("mtspr	273, %0" : "=r" (intrStack) : "0" (intrStack));
  asm volatile ("mtspr	272, %0" : "=r" (intrNestingLevel) : "0" (intrNestingLevel));
 
   /*
    * Install our own set of exception vectors
    */
   initialize_exceptions();
 
  /*
   *  Allocate the memory for the RTEMS Work Space.  This can come from
   *  a variety of places: hard coded address, malloc'ed from outside
   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
   *  typically done by stock BSPs) by subtracting the required amount
   *  of work space from the last physical address on the CPU board.
   */

  /*
   *  Need to "allocate" the memory for the RTEMS Workspace and
   *  tell the RTEMS configuration where it is.  This memory is
   *  not malloc'ed.  It is just "pulled from the air".
   */

  heap_start = (rtems_unsigned32) &_end;
  if (heap_start & (CPU_ALIGNMENT-1))
    heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);


  ws_start = heap_start + (256 * 1024);
  if (ws_start & ((512 * 1024) - 1)) {  /* align to 512K boundary */
    ws_start = (ws_start + (512 * 1024)) & ~((512 * 1024) - 1);
  }

  BSP_Configuration.work_space_start = (void *)ws_start;
  BSP_Configuration.work_space_size = 512 * 1024; 

  /*
   *  initialize the CPU table for this BSP
   */

  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
  Cpu_table.postdriver_hook = bsp_postdriver_hook;
  Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY;

  Cpu_table.clicks_per_usec = 1;  /* for 4MHz extclk */
  Cpu_table.serial_per_sec = 10000000;
  Cpu_table.serial_external_clock = 1;
  Cpu_table.serial_xon_xoff = 0;
  Cpu_table.serial_cts_rts = 1;
  Cpu_table.serial_rate = 9600;
  Cpu_table.timer_average_overhead = 0;
  Cpu_table.timer_least_valid = 0;
  Cpu_table.clock_speed = 40000000;

  /*
   * Since we are currently autodetecting whether to use SCC1 or
   * the FEC for ethernet, we set up a register in the ethernet
   * transciever that is used for 10/100 Mbps ethernet now, so that 
   * we can attempt to read it later in rtems_enet_driver_attach()
  */
  m8xx.fec.mii_speed = 0x0a;
  m8xx.fec.mii_data = 0x680a0000;


  m8xx.scc2.sccm=0;
  m8xx.scc2p.rbase=0;
  m8xx.scc2p.tbase=0;
  m8xx_cp_execute_cmd( M8xx_CR_OP_STOP_TX | M8xx_CR_CHAN_SCC2 );
  /*
   * Initalize RTEMS IRQ system
   */
  BSP_rtems_irq_mng_init(0);
#ifdef SHOW_MORE_INIT_SETTINGS
  printk("Exit from bspstart\n");
#endif  

}