1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _M68K_IRQFLAGS_H 3 #define _M68K_IRQFLAGS_H 4 5 #include <linux/types.h> 6 #include <linux/preempt.h> 7 #include <asm/thread_info.h> 8 #include <asm/entry.h> 9 10 static inline unsigned long arch_local_save_flags(void) 11 { 12 unsigned long flags; 13 asm volatile ("movew %%sr,%0" : "=d" (flags) : : "memory"); 14 return flags; 15 } 16 17 static inline void arch_local_irq_disable(void) 18 { 19 #ifdef CONFIG_COLDFIRE 20 asm volatile ( 21 "move %/sr,%%d0 \n\t" 22 "ori.l #0x0700,%%d0 \n\t" 23 "move %%d0,%/sr \n" 24 : /* no outputs */ 25 : 26 : "cc", "%d0", "memory"); 27 #else 28 asm volatile ("oriw #0x0700,%%sr" : : : "memory"); 29 #endif 30 } 31 32 static inline void arch_local_irq_enable(void) 33 { 34 #if defined(CONFIG_COLDFIRE) 35 asm volatile ( 36 "move %/sr,%%d0 \n\t" 37 "andi.l #0xf8ff,%%d0 \n\t" 38 "move %%d0,%/sr \n" 39 : /* no outputs */ 40 : 41 : "cc", "%d0", "memory"); 42 #else 43 # if defined(CONFIG_MMU) 44 if (MACH_IS_Q40 || !hardirq_count()) 45 # endif 46 asm volatile ( 47 "andiw %0,%%sr" 48 : 49 : "i" (ALLOWINT) 50 : "memory"); 51 #endif 52 } 53 54 static inline unsigned long arch_local_irq_save(void) 55 { 56 unsigned long flags = arch_local_save_flags(); 57 arch_local_irq_disable(); 58 return flags; 59 } 60 61 static inline void arch_local_irq_restore(unsigned long flags) 62 { 63 asm volatile ("movew %0,%%sr" : : "d" (flags) : "memory"); 64 } 65 66 static inline bool arch_irqs_disabled_flags(unsigned long flags) 67 { 68 if (MACH_IS_ATARI) { 69 /* Ignore HSYNC = ipl 2 on Atari */ 70 return (flags & ~(ALLOWINT | 0x200)) != 0; 71 } 72 return (flags & ~ALLOWINT) != 0; 73 } 74 75 static inline bool arch_irqs_disabled(void) 76 { 77 return arch_irqs_disabled_flags(arch_local_save_flags()); 78 } 79 80 #endif /* _M68K_IRQFLAGS_H */ 81