1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * IRQ flags defines. 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (C) 1998-2003 Hewlett-Packard Co 6*4882a593Smuzhiyun * David Mosberger-Tang <davidm@hpl.hp.com> 7*4882a593Smuzhiyun * Copyright (C) 1999 Asit Mallick <asit.k.mallick@intel.com> 8*4882a593Smuzhiyun * Copyright (C) 1999 Don Dugger <don.dugger@intel.com> 9*4882a593Smuzhiyun */ 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #ifndef _ASM_IA64_IRQFLAGS_H 12*4882a593Smuzhiyun #define _ASM_IA64_IRQFLAGS_H 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #include <asm/pal.h> 15*4882a593Smuzhiyun #include <asm/kregs.h> 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun #ifdef CONFIG_IA64_DEBUG_IRQ 18*4882a593Smuzhiyun extern unsigned long last_cli_ip; arch_maybe_save_ip(unsigned long flags)19*4882a593Smuzhiyunstatic inline void arch_maybe_save_ip(unsigned long flags) 20*4882a593Smuzhiyun { 21*4882a593Smuzhiyun if (flags & IA64_PSR_I) 22*4882a593Smuzhiyun last_cli_ip = ia64_getreg(_IA64_REG_IP); 23*4882a593Smuzhiyun } 24*4882a593Smuzhiyun #else 25*4882a593Smuzhiyun #define arch_maybe_save_ip(flags) do {} while (0) 26*4882a593Smuzhiyun #endif 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun /* 29*4882a593Smuzhiyun * - clearing psr.i is implicitly serialized (visible by next insn) 30*4882a593Smuzhiyun * - setting psr.i requires data serialization 31*4882a593Smuzhiyun * - we need a stop-bit before reading PSR because we sometimes 32*4882a593Smuzhiyun * write a floating-point register right before reading the PSR 33*4882a593Smuzhiyun * and that writes to PSR.mfl 34*4882a593Smuzhiyun */ 35*4882a593Smuzhiyun arch_local_save_flags(void)36*4882a593Smuzhiyunstatic inline unsigned long arch_local_save_flags(void) 37*4882a593Smuzhiyun { 38*4882a593Smuzhiyun ia64_stop(); 39*4882a593Smuzhiyun return ia64_getreg(_IA64_REG_PSR); 40*4882a593Smuzhiyun } 41*4882a593Smuzhiyun arch_local_irq_save(void)42*4882a593Smuzhiyunstatic inline unsigned long arch_local_irq_save(void) 43*4882a593Smuzhiyun { 44*4882a593Smuzhiyun unsigned long flags = arch_local_save_flags(); 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun ia64_stop(); 47*4882a593Smuzhiyun ia64_rsm(IA64_PSR_I); 48*4882a593Smuzhiyun arch_maybe_save_ip(flags); 49*4882a593Smuzhiyun return flags; 50*4882a593Smuzhiyun } 51*4882a593Smuzhiyun arch_local_irq_disable(void)52*4882a593Smuzhiyunstatic inline void arch_local_irq_disable(void) 53*4882a593Smuzhiyun { 54*4882a593Smuzhiyun #ifdef CONFIG_IA64_DEBUG_IRQ 55*4882a593Smuzhiyun arch_local_irq_save(); 56*4882a593Smuzhiyun #else 57*4882a593Smuzhiyun ia64_stop(); 58*4882a593Smuzhiyun ia64_rsm(IA64_PSR_I); 59*4882a593Smuzhiyun #endif 60*4882a593Smuzhiyun } 61*4882a593Smuzhiyun arch_local_irq_enable(void)62*4882a593Smuzhiyunstatic inline void arch_local_irq_enable(void) 63*4882a593Smuzhiyun { 64*4882a593Smuzhiyun ia64_stop(); 65*4882a593Smuzhiyun ia64_ssm(IA64_PSR_I); 66*4882a593Smuzhiyun ia64_srlz_d(); 67*4882a593Smuzhiyun } 68*4882a593Smuzhiyun arch_local_irq_restore(unsigned long flags)69*4882a593Smuzhiyunstatic inline void arch_local_irq_restore(unsigned long flags) 70*4882a593Smuzhiyun { 71*4882a593Smuzhiyun #ifdef CONFIG_IA64_DEBUG_IRQ 72*4882a593Smuzhiyun unsigned long old_psr = arch_local_save_flags(); 73*4882a593Smuzhiyun #endif 74*4882a593Smuzhiyun ia64_intrin_local_irq_restore(flags & IA64_PSR_I); 75*4882a593Smuzhiyun arch_maybe_save_ip(old_psr & ~flags); 76*4882a593Smuzhiyun } 77*4882a593Smuzhiyun arch_irqs_disabled_flags(unsigned long flags)78*4882a593Smuzhiyunstatic inline bool arch_irqs_disabled_flags(unsigned long flags) 79*4882a593Smuzhiyun { 80*4882a593Smuzhiyun return (flags & IA64_PSR_I) == 0; 81*4882a593Smuzhiyun } 82*4882a593Smuzhiyun arch_irqs_disabled(void)83*4882a593Smuzhiyunstatic inline bool arch_irqs_disabled(void) 84*4882a593Smuzhiyun { 85*4882a593Smuzhiyun return arch_irqs_disabled_flags(arch_local_save_flags()); 86*4882a593Smuzhiyun } 87*4882a593Smuzhiyun arch_safe_halt(void)88*4882a593Smuzhiyunstatic inline void arch_safe_halt(void) 89*4882a593Smuzhiyun { 90*4882a593Smuzhiyun arch_local_irq_enable(); 91*4882a593Smuzhiyun ia64_pal_halt_light(); /* PAL_HALT_LIGHT */ 92*4882a593Smuzhiyun } 93*4882a593Smuzhiyun 94*4882a593Smuzhiyun 95*4882a593Smuzhiyun #endif /* _ASM_IA64_IRQFLAGS_H */ 96