1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _SPARC64_PIL_H
3#define _SPARC64_PIL_H
4
5/* To avoid some locking problems, we hard allocate certain PILs
6 * for SMP cross call messages that must do a etrap/rtrap.
7 *
8 * A local_irq_disable() does not block the cross call delivery, so
9 * when SMP locking is an issue we reschedule the event into a PIL
10 * interrupt which is blocked by local_irq_disable().
11 *
12 * In fact any XCALL which has to etrap/rtrap has a problem because
13 * it is difficult to prevent rtrap from running BH's, and that would
14 * need to be done if the XCALL arrived while %pil==PIL_NORMAL_MAX.
15 *
16 * Finally, in order to handle profiling events even when a
17 * local_irq_disable() is in progress, we only disable up to level 14
18 * interrupts.  Profile counter overflow interrupts arrive at level
19 * 15.
20 */
21#define PIL_SMP_CALL_FUNC	1
22#define PIL_SMP_RECEIVE_SIGNAL	2
23#define PIL_SMP_CAPTURE		3
24#define PIL_DEVICE_IRQ		5
25#define PIL_SMP_CALL_FUNC_SNGL	6
26#define PIL_DEFERRED_PCR_WORK	7
27#define PIL_KGDB_CAPTURE	8
28#define PIL_NORMAL_MAX		14
29#define PIL_NMI			15
30
31#endif /* !(_SPARC64_PIL_H) */
32