projects / people / arne_f / kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| df9ee292 DH |
2 | /* |
| 3 | * IRQ flags defines. | |
| 4 | * | |
| 5 | * Copyright (C) 1998-2003 Hewlett-Packard Co | |
| 6 | * David Mosberger-Tang <davidm@hpl.hp.com> | |
| 7 | * Copyright (C) 1999 Asit Mallick <asit.k.mallick@intel.com> | |
| 8 | * Copyright (C) 1999 Don Dugger <don.dugger@intel.com> | |
| 9 | */ | |
| 10 | ||
| 11 | #ifndef _ASM_IA64_IRQFLAGS_H | |
| 12 | #define _ASM_IA64_IRQFLAGS_H | |
| 13 | ||
| c140d879 | 14 | #include <asm/pal.h> |
| f7577310 | 15 | #include <asm/kregs.h> |
| c140d879 | 16 | |
| df9ee292 DH |
17 | #ifdef CONFIG_IA64_DEBUG_IRQ |
| 18 | extern unsigned long last_cli_ip; | |
| 19 | static inline void arch_maybe_save_ip(unsigned long flags) | |
| 20 | { | |
| 21 | if (flags & IA64_PSR_I) | |
| 22 | last_cli_ip = ia64_getreg(_IA64_REG_IP); | |
| 23 | } | |
| 24 | #else | |
| 25 | #define arch_maybe_save_ip(flags) do {} while (0) | |
| 26 | #endif | |
| 27 | ||
| 28 | /* | |
| 29 | * - clearing psr.i is implicitly serialized (visible by next insn) | |
| 30 | * - setting psr.i requires data serialization | |
| 31 | * - we need a stop-bit before reading PSR because we sometimes | |
| 32 | * write a floating-point register right before reading the PSR | |
| 33 | * and that writes to PSR.mfl | |
| 34 | */ | |
| 35 | ||
| 36 | static inline unsigned long arch_local_save_flags(void) | |
| 37 | { | |
| 38 | ia64_stop(); | |
| 39 | #ifdef CONFIG_PARAVIRT | |
| 40 | return ia64_get_psr_i(); | |
| 41 | #else | |
| 42 | return ia64_getreg(_IA64_REG_PSR); | |
| 43 | #endif | |
| 44 | } | |
| 45 | ||
| 46 | static inline unsigned long arch_local_irq_save(void) | |
| 47 | { | |
| 48 | unsigned long flags = arch_local_save_flags(); | |
| 49 | ||
| 50 | ia64_stop(); | |
| 51 | ia64_rsm(IA64_PSR_I); | |
| 52 | arch_maybe_save_ip(flags); | |
| 53 | return flags; | |
| 54 | } | |
| 55 | ||
| 56 | static inline void arch_local_irq_disable(void) | |
| 57 | { | |
| 58 | #ifdef CONFIG_IA64_DEBUG_IRQ | |
| 59 | arch_local_irq_save(); | |
| 60 | #else | |
| 61 | ia64_stop(); | |
| 62 | ia64_rsm(IA64_PSR_I); | |
| 63 | #endif | |
| 64 | } | |
| 65 | ||
| 66 | static inline void arch_local_irq_enable(void) | |
| 67 | { | |
| 68 | ia64_stop(); | |
| 69 | ia64_ssm(IA64_PSR_I); | |
| 70 | ia64_srlz_d(); | |
| 71 | } | |
| 72 | ||
| 73 | static inline void arch_local_irq_restore(unsigned long flags) | |
| 74 | { | |
| 75 | #ifdef CONFIG_IA64_DEBUG_IRQ | |
| 76 | unsigned long old_psr = arch_local_save_flags(); | |
| 77 | #endif | |
| 78 | ia64_intrin_local_irq_restore(flags & IA64_PSR_I); | |
| 79 | arch_maybe_save_ip(old_psr & ~flags); | |
| 80 | } | |
| 81 | ||
| 82 | static inline bool arch_irqs_disabled_flags(unsigned long flags) | |
| 83 | { | |
| 84 | return (flags & IA64_PSR_I) == 0; | |
| 85 | } | |
| 86 | ||
| 87 | static inline bool arch_irqs_disabled(void) | |
| 88 | { | |
| 89 | return arch_irqs_disabled_flags(arch_local_save_flags()); | |
| 90 | } | |
| 91 | ||
| 92 | static inline void arch_safe_halt(void) | |
| 93 | { | |
| 2412aa12 | 94 | arch_local_irq_enable(); |
| df9ee292 DH |
95 | ia64_pal_halt_light(); /* PAL_HALT_LIGHT */ |
| 96 | } | |
| 97 | ||
| 98 | ||
| 99 | #endif /* _ASM_IA64_IRQFLAGS_H */ |