RTEMS: bsps/bfin/include/libcpu/interrupt.h Source File

| RTEMS 5.4-rc2

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interrupt.h
1/*
2 * RTEMS support for Blackfin interrupt controller
3 *
4 * COPYRIGHT (c) 2008 Kallisti Labs, Los Gatos, CA, USA
5 * written by Allan Hessenflow <allanh@kallisti.com>
6 *
7 * The license and distribution terms for this file may be
8 * found in the file LICENSE in this distribution or at
9 * http://www.rtems.org/license/LICENSE.
10 */
11
12#ifndef _interrupt_h_
13#define _interrupt_h_
14
15/* Some rules for using this module:
16
17 SIC_IARx registers must not be changed after calling
18 bfin_interrupt_init().
19
20 The bfin_isr structures must stick around for as long as the isr is
21 registered.
22
23 For any interrupt source (SIC bit) that could be shared, it is only
24 safe to disable an ISR through this module if the ultimate source is
25 also disabled (the ultimate source must be disabled prior to disabling
26 it through this module, and must remain disabled until after enabling
27 it through this module).
28
29 For any source that is shared with modules that cannot be disabled,
30 give careful thought to the control of those interrupts.
31 bfin_interrupt_enable_all() or bfin_interrupt_enable_global() can
32 be used to help solve the problems caused by that.
33
34
35 Note that this module does not provide prioritization. It is assumed
36 that the priorities afforded by the CEC are sufficient. If finer
37 grained priority control is required then this wlll need to be
38 redesigned.
39*/
40
41
42#ifdef __cplusplus
43extern "C" {
44#endif
45
46/* source is the source to the SIC (the bit number in SIC_ISR). isr is
47 the function that will be called when the interrupt is active. */
48typedef struct bfin_isr_s {
49 int source;
50 void (*isr)(int source);
51 /* the following are for internal use only */
52 uint32_t mask;
53 int vector;
54 struct bfin_isr_s *next;
55} bfin_isr_t;
56
57/* If non-default mapping is desired, the BSP should set the SIC_IARx
58 registers prior to calling this. */
59void bfin_interrupt_init(void);
60
61/* ISR starts out disabled */
62void bfin_interrupt_register(bfin_isr_t *isr);
63void bfin_interrupt_unregister(bfin_isr_t *isr);
64
65/* enable/disable specific ISR */
66void bfin_interrupt_enable(bfin_isr_t *isr, bool enable);
67
68/* atomically enable/disable all ISRs attached to specified source */
69void bfin_interrupt_enable_all(int source, bool enable);
70
71/* disable a source independently of the individual ISR enables (starts
72 out all enabled) */
73void bfin_interrupt_enable_global(int source, bool enable);
74
75#ifdef __cplusplus
76}
77#endif
78
79#endif /* _interrupt_h_ */
80
bfin_interrupt_init
void bfin_interrupt_init(void)
Definition: interrupt.c:50
bfin_interrupt_register
rtems_status_code bfin_interrupt_register(bfin_isr_t *isr)
Definition: interrupt.c:98
bfin_interrupt_unregister
rtems_status_code bfin_interrupt_unregister(bfin_isr_t *isr)
Definition: interrupt.c:126
bfin_isr_s
Definition: interrupt.h:100