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