18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 28c2ecf20Sopenharmony_ci#ifndef _SPARC64_PIL_H 38c2ecf20Sopenharmony_ci#define _SPARC64_PIL_H 48c2ecf20Sopenharmony_ci 58c2ecf20Sopenharmony_ci/* To avoid some locking problems, we hard allocate certain PILs 68c2ecf20Sopenharmony_ci * for SMP cross call messages that must do a etrap/rtrap. 78c2ecf20Sopenharmony_ci * 88c2ecf20Sopenharmony_ci * A local_irq_disable() does not block the cross call delivery, so 98c2ecf20Sopenharmony_ci * when SMP locking is an issue we reschedule the event into a PIL 108c2ecf20Sopenharmony_ci * interrupt which is blocked by local_irq_disable(). 118c2ecf20Sopenharmony_ci * 128c2ecf20Sopenharmony_ci * In fact any XCALL which has to etrap/rtrap has a problem because 138c2ecf20Sopenharmony_ci * it is difficult to prevent rtrap from running BH's, and that would 148c2ecf20Sopenharmony_ci * need to be done if the XCALL arrived while %pil==PIL_NORMAL_MAX. 158c2ecf20Sopenharmony_ci * 168c2ecf20Sopenharmony_ci * Finally, in order to handle profiling events even when a 178c2ecf20Sopenharmony_ci * local_irq_disable() is in progress, we only disable up to level 14 188c2ecf20Sopenharmony_ci * interrupts. Profile counter overflow interrupts arrive at level 198c2ecf20Sopenharmony_ci * 15. 208c2ecf20Sopenharmony_ci */ 218c2ecf20Sopenharmony_ci#define PIL_SMP_CALL_FUNC 1 228c2ecf20Sopenharmony_ci#define PIL_SMP_RECEIVE_SIGNAL 2 238c2ecf20Sopenharmony_ci#define PIL_SMP_CAPTURE 3 248c2ecf20Sopenharmony_ci#define PIL_DEVICE_IRQ 5 258c2ecf20Sopenharmony_ci#define PIL_SMP_CALL_FUNC_SNGL 6 268c2ecf20Sopenharmony_ci#define PIL_DEFERRED_PCR_WORK 7 278c2ecf20Sopenharmony_ci#define PIL_KGDB_CAPTURE 8 288c2ecf20Sopenharmony_ci#define PIL_NORMAL_MAX 14 298c2ecf20Sopenharmony_ci#define PIL_NMI 15 308c2ecf20Sopenharmony_ci 318c2ecf20Sopenharmony_ci#endif /* !(_SPARC64_PIL_H) */ 32