2 * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
4 #ifndef _ASM_POWERPC_HW_IRQ_H
5 #define _ASM_POWERPC_HW_IRQ_H
9 #include <linux/errno.h>
10 #include <linux/compiler.h>
11 #include <asm/ptrace.h>
12 #include <asm/processor.h>
17 * PACA flags in paca->irq_happened.
19 * This bits are set when interrupts occur while soft-disabled
20 * and allow a proper replay. Additionally, PACA_IRQ_HARD_DIS
21 * is set whenever we manually hard disable.
23 #define PACA_IRQ_HARD_DIS 0x01
24 #define PACA_IRQ_DBELL 0x02
25 #define PACA_IRQ_EE 0x04
26 #define PACA_IRQ_DEC 0x08 /* Or FIT */
27 #define PACA_IRQ_EE_EDGE 0x10 /* BookE only */
29 #endif /* CONFIG_PPC64 */
33 extern void __replay_interrupt(unsigned int vector
);
35 extern void timer_interrupt(struct pt_regs
*);
36 extern void performance_monitor_exception(struct pt_regs
*regs
);
41 static inline unsigned long arch_local_save_flags(void)
48 : "i" (offsetof(struct paca_struct
, soft_enabled
)));
53 static inline unsigned long arch_local_irq_disable(void)
55 unsigned long flags
, zero
;
58 "li %1,0; lbz %0,%2(13); stb %1,%2(13)"
59 : "=r" (flags
), "=&r" (zero
)
60 : "i" (offsetof(struct paca_struct
, soft_enabled
))
66 extern void arch_local_irq_restore(unsigned long);
68 static inline void arch_local_irq_enable(void)
70 arch_local_irq_restore(1);
73 static inline unsigned long arch_local_irq_save(void)
75 return arch_local_irq_disable();
78 static inline bool arch_irqs_disabled_flags(unsigned long flags
)
83 static inline bool arch_irqs_disabled(void)
85 return arch_irqs_disabled_flags(arch_local_save_flags());
88 #ifdef CONFIG_PPC_BOOK3E
89 #define __hard_irq_enable() asm volatile("wrteei 1" : : : "memory");
90 #define __hard_irq_disable() asm volatile("wrteei 0" : : : "memory");
92 #define __hard_irq_enable() __mtmsrd(local_paca->kernel_msr | MSR_EE, 1)
93 #define __hard_irq_disable() __mtmsrd(local_paca->kernel_msr, 1)
96 static inline void hard_irq_disable(void)
99 get_paca()->soft_enabled
= 0;
100 get_paca()->irq_happened
|= PACA_IRQ_HARD_DIS
;
103 /* include/linux/interrupt.h needs hard_irq_disable to be a macro */
104 #define hard_irq_disable hard_irq_disable
106 static inline bool lazy_irq_pending(void)
108 return !!(get_paca()->irq_happened
& ~PACA_IRQ_HARD_DIS
);
112 * This is called by asynchronous interrupts to conditionally
113 * re-enable hard interrupts when soft-disabled after having
114 * cleared the source of the interrupt
116 static inline void may_hard_irq_enable(void)
118 get_paca()->irq_happened
&= ~PACA_IRQ_HARD_DIS
;
119 if (!(get_paca()->irq_happened
& PACA_IRQ_EE
))
123 static inline bool arch_irq_disabled_regs(struct pt_regs
*regs
)
128 #else /* CONFIG_PPC64 */
130 #define SET_MSR_EE(x) mtmsr(x)
132 static inline unsigned long arch_local_save_flags(void)
137 static inline void arch_local_irq_restore(unsigned long flags
)
139 #if defined(CONFIG_BOOKE)
140 asm volatile("wrtee %0" : : "r" (flags
) : "memory");
146 static inline unsigned long arch_local_irq_save(void)
148 unsigned long flags
= arch_local_save_flags();
150 asm volatile("wrteei 0" : : : "memory");
152 SET_MSR_EE(flags
& ~MSR_EE
);
157 static inline void arch_local_irq_disable(void)
160 asm volatile("wrteei 0" : : : "memory");
162 arch_local_irq_save();
166 static inline void arch_local_irq_enable(void)
169 asm volatile("wrteei 1" : : : "memory");
171 unsigned long msr
= mfmsr();
172 SET_MSR_EE(msr
| MSR_EE
);
176 static inline bool arch_irqs_disabled_flags(unsigned long flags
)
178 return (flags
& MSR_EE
) == 0;
181 static inline bool arch_irqs_disabled(void)
183 return arch_irqs_disabled_flags(arch_local_save_flags());
186 #define hard_irq_disable() arch_local_irq_disable()
188 static inline bool arch_irq_disabled_regs(struct pt_regs
*regs
)
190 return !(regs
->msr
& MSR_EE
);
193 static inline void may_hard_irq_enable(void) { }
195 #endif /* CONFIG_PPC64 */
197 #define ARCH_IRQ_INIT_FLAGS IRQ_NOREQUEST
200 * interrupt-retrigger: should we handle this via lost interrupts and IPIs
201 * or should we not care like we do now ? --BenH.
205 #endif /* __ASSEMBLY__ */
206 #endif /* __KERNEL__ */
207 #endif /* _ASM_POWERPC_HW_IRQ_H */
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