1 | /* |
---|
2 | * ISR Handler |
---|
3 | * |
---|
4 | * |
---|
5 | * COPYRIGHT (c) 1989-1999. |
---|
6 | * On-Line Applications Research Corporation (OAR). |
---|
7 | * |
---|
8 | * The license and distribution terms for this file may be |
---|
9 | * found in the file LICENSE in this distribution or at |
---|
10 | * http://www.OARcorp.com/rtems/license.html. |
---|
11 | * |
---|
12 | * $Id$ |
---|
13 | */ |
---|
14 | |
---|
15 | #include <rtems/system.h> |
---|
16 | #include <rtems/score/isr.h> |
---|
17 | #include <rtems/score/stack.h> |
---|
18 | #include <rtems/score/interr.h> |
---|
19 | #include <rtems/score/wkspace.h> |
---|
20 | |
---|
21 | /* _ISR_Handler_initialization |
---|
22 | * |
---|
23 | * This routine initializes the ISR handler. |
---|
24 | * |
---|
25 | * Input parameters: NONE |
---|
26 | * |
---|
27 | * Output parameters: NONE |
---|
28 | */ |
---|
29 | |
---|
30 | void _ISR_Handler_initialization( void ) |
---|
31 | { |
---|
32 | _ISR_Signals_to_thread_executing = FALSE; |
---|
33 | |
---|
34 | _ISR_Nest_level = 0; |
---|
35 | |
---|
36 | #if ( CPU_ALLOCATE_INTERRUPT_STACK == TRUE ) |
---|
37 | |
---|
38 | if ( _CPU_Table.interrupt_stack_size < STACK_MINIMUM_SIZE ) |
---|
39 | _Internal_error_Occurred( |
---|
40 | INTERNAL_ERROR_CORE, |
---|
41 | TRUE, |
---|
42 | INTERNAL_ERROR_INTERRUPT_STACK_TOO_SMALL |
---|
43 | ); |
---|
44 | |
---|
45 | _CPU_Interrupt_stack_low = |
---|
46 | _Workspace_Allocate_or_fatal_error( _CPU_Table.interrupt_stack_size ); |
---|
47 | |
---|
48 | _CPU_Interrupt_stack_high = _Addresses_Add_offset( |
---|
49 | _CPU_Interrupt_stack_low, |
---|
50 | _CPU_Table.interrupt_stack_size |
---|
51 | ); |
---|
52 | |
---|
53 | #endif |
---|
54 | |
---|
55 | #if ( CPU_HAS_HARDWARE_INTERRUPT_STACK == TRUE ) |
---|
56 | _CPU_Install_interrupt_stack(); |
---|
57 | #endif |
---|
58 | |
---|
59 | } |
---|