Current File : //usr/src/linux-headers-5.15.0-43/arch/sparc/include/asm/pil.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _SPARC64_PIL_H
#define _SPARC64_PIL_H
/* To avoid some locking problems, we hard allocate certain PILs
* for SMP cross call messages that must do a etrap/rtrap.
*
* A local_irq_disable() does not block the cross call delivery, so
* when SMP locking is an issue we reschedule the event into a PIL
* interrupt which is blocked by local_irq_disable().
*
* In fact any XCALL which has to etrap/rtrap has a problem because
* it is difficult to prevent rtrap from running BH's, and that would
* need to be done if the XCALL arrived while %pil==PIL_NORMAL_MAX.
*
* Finally, in order to handle profiling events even when a
* local_irq_disable() is in progress, we only disable up to level 14
* interrupts. Profile counter overflow interrupts arrive at level
* 15.
*/
#define PIL_SMP_CALL_FUNC 1
#define PIL_SMP_RECEIVE_SIGNAL 2
#define PIL_SMP_CAPTURE 3
#define PIL_DEVICE_IRQ 5
#define PIL_SMP_CALL_FUNC_SNGL 6
#define PIL_DEFERRED_PCR_WORK 7
#define PIL_KGDB_CAPTURE 8
#define PIL_NORMAL_MAX 14
#define PIL_NMI 15
#endif /* !(_SPARC64_PIL_H) */
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