1 | /* |
---|
2 | * This routine starts the application. It includes application, |
---|
3 | * board, and monitor specific initialization and configuration. |
---|
4 | * The generic CPU dependent initialization has been performed |
---|
5 | * before this routine is invoked. |
---|
6 | * |
---|
7 | * COPYRIGHT (c) 1989-1999. |
---|
8 | * On-Line Applications Research Corporation (OAR). |
---|
9 | * |
---|
10 | * The license and distribution terms for this file may be |
---|
11 | * found in the file LICENSE in this distribution or at |
---|
12 | * http://www.OARcorp.com/rtems/license.html. |
---|
13 | * |
---|
14 | * $Id$ |
---|
15 | */ |
---|
16 | |
---|
17 | #include <bsp.h> |
---|
18 | #include <rtems/libio.h> |
---|
19 | |
---|
20 | #include <libcsupport.h> |
---|
21 | |
---|
22 | #include <string.h> |
---|
23 | |
---|
24 | /* |
---|
25 | * The original table from the application and our copy of it with |
---|
26 | * some changes. |
---|
27 | */ |
---|
28 | |
---|
29 | extern rtems_configuration_table Configuration; |
---|
30 | rtems_configuration_table BSP_Configuration; |
---|
31 | |
---|
32 | rtems_cpu_table Cpu_table; |
---|
33 | |
---|
34 | char *rtems_progname; |
---|
35 | |
---|
36 | /* |
---|
37 | * Use the shared implementations of the following routines |
---|
38 | */ |
---|
39 | |
---|
40 | void bsp_postdriver_hook(void); |
---|
41 | void bsp_libc_init( void *, unsigned32, int ); |
---|
42 | void bsp_pretasking_hook(void); /* m68k version */ |
---|
43 | |
---|
44 | /* |
---|
45 | * bsp_start |
---|
46 | * |
---|
47 | * This routine does the bulk of the system initialization. |
---|
48 | */ |
---|
49 | |
---|
50 | void bsp_start( void ) |
---|
51 | { |
---|
52 | m68k_isr_entry *monitors_vector_table; |
---|
53 | int index; |
---|
54 | void *vbr; |
---|
55 | extern void *_WorkspaceBase; |
---|
56 | extern void *_RamSize; |
---|
57 | extern unsigned long _M68k_Ramsize; |
---|
58 | |
---|
59 | _M68k_Ramsize = (unsigned long)&_RamSize; /* RAM size set in linker script */ |
---|
60 | |
---|
61 | monitors_vector_table = (m68k_isr_entry *)0; /* Monitor Vectors are at 0 */ |
---|
62 | m68k_set_vbr( monitors_vector_table ); |
---|
63 | |
---|
64 | for ( index=2 ; index<=255 ; index++ ) |
---|
65 | M68Kvec[ index ] = monitors_vector_table[ 32 ]; |
---|
66 | |
---|
67 | M68Kvec[ 2 ] = monitors_vector_table[ 2 ]; /* bus error vector */ |
---|
68 | M68Kvec[ 4 ] = monitors_vector_table[ 4 ]; /* breakpoints vector */ |
---|
69 | M68Kvec[ 9 ] = monitors_vector_table[ 9 ]; /* trace vector */ |
---|
70 | |
---|
71 | /* |
---|
72 | * Uncommenting this seems to confuse/break the monitor on this board. |
---|
73 | * It probably assumes the vector table is at 0. |
---|
74 | */ |
---|
75 | |
---|
76 | /* m68k_set_vbr( &M68Kvec ); */ |
---|
77 | |
---|
78 | /* |
---|
79 | * Adjust the VMEbus mode to round-robin. |
---|
80 | */ |
---|
81 | |
---|
82 | /* |
---|
83 | * This is only apparent with the shared memory driver which has not |
---|
84 | * yet been supported on this target. |
---|
85 | */ |
---|
86 | |
---|
87 | m68k_enable_caching(); |
---|
88 | |
---|
89 | /* |
---|
90 | * we only use a hook to get the C library initialized. |
---|
91 | */ |
---|
92 | |
---|
93 | Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ |
---|
94 | Cpu_table.postdriver_hook = bsp_postdriver_hook; |
---|
95 | Cpu_table.do_zero_of_workspace = TRUE; |
---|
96 | Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY; |
---|
97 | |
---|
98 | m68k_get_vbr( vbr ); |
---|
99 | Cpu_table.interrupt_vector_table = vbr; |
---|
100 | |
---|
101 | BSP_Configuration.work_space_start = (void *) &_WorkspaceBase; |
---|
102 | |
---|
103 | /* Clock_exit is done as an atexit() function */ |
---|
104 | } |
---|