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 */
28 #define PACA_IRQ_HMI 0x20
30 #endif /* CONFIG_PPC64 */
34 extern void __replay_interrupt(unsigned int vector);
36 extern void timer_interrupt(struct pt_regs *);
37 extern void performance_monitor_exception(struct pt_regs *regs);
38 extern void WatchdogException(struct pt_regs *regs);
39 extern void unknown_exception(struct pt_regs *regs);
44 static inline unsigned long arch_local_save_flags(void)
51 : "i" (offsetof(struct paca_struct, soft_enabled)));
56 static inline unsigned long arch_local_irq_disable(void)
58 unsigned long flags, zero;
61 "li %1,0; lbz %0,%2(13); stb %1,%2(13)"
62 : "=r" (flags), "=&r" (zero)
63 : "i" (offsetof(struct paca_struct, soft_enabled))
69 extern void arch_local_irq_restore(unsigned long);
71 static inline void arch_local_irq_enable(void)
73 arch_local_irq_restore(1);
76 static inline unsigned long arch_local_irq_save(void)
78 return arch_local_irq_disable();
81 static inline bool arch_irqs_disabled_flags(unsigned long flags)
86 static inline bool arch_irqs_disabled(void)
88 return arch_irqs_disabled_flags(arch_local_save_flags());
91 #ifdef CONFIG_PPC_BOOK3E
92 #define __hard_irq_enable() asm volatile("wrteei 1" : : : "memory")
93 #define __hard_irq_disable() asm volatile("wrteei 0" : : : "memory")
95 #define __hard_irq_enable() __mtmsrd(local_paca->kernel_msr | MSR_EE, 1)
96 #define __hard_irq_disable() __mtmsrd(local_paca->kernel_msr, 1)
99 #define hard_irq_disable() do { \
101 __hard_irq_disable(); \
102 _was_enabled = local_paca->soft_enabled; \
103 local_paca->soft_enabled = 0; \
104 local_paca->irq_happened |= PACA_IRQ_HARD_DIS; \
106 trace_hardirqs_off(); \
109 static inline bool lazy_irq_pending(void)
111 return !!(get_paca()->irq_happened & ~PACA_IRQ_HARD_DIS);
115 * This is called by asynchronous interrupts to conditionally
116 * re-enable hard interrupts when soft-disabled after having
117 * cleared the source of the interrupt
119 static inline void may_hard_irq_enable(void)
121 get_paca()->irq_happened &= ~PACA_IRQ_HARD_DIS;
122 if (!(get_paca()->irq_happened & PACA_IRQ_EE))
126 static inline bool arch_irq_disabled_regs(struct pt_regs *regs)
131 extern bool prep_irq_for_idle(void);
133 extern void force_external_irq_replay(void);
135 #else /* CONFIG_PPC64 */
137 #define SET_MSR_EE(x) mtmsr(x)
139 static inline unsigned long arch_local_save_flags(void)
144 static inline void arch_local_irq_restore(unsigned long flags)
146 #if defined(CONFIG_BOOKE)
147 asm volatile("wrtee %0" : : "r" (flags) : "memory");
153 static inline unsigned long arch_local_irq_save(void)
155 unsigned long flags = arch_local_save_flags();
157 asm volatile("wrteei 0" : : : "memory");
159 SET_MSR_EE(flags & ~MSR_EE);
164 static inline void arch_local_irq_disable(void)
167 asm volatile("wrteei 0" : : : "memory");
169 arch_local_irq_save();
173 static inline void arch_local_irq_enable(void)
176 asm volatile("wrteei 1" : : : "memory");
178 unsigned long msr = mfmsr();
179 SET_MSR_EE(msr | MSR_EE);
183 static inline bool arch_irqs_disabled_flags(unsigned long flags)
185 return (flags & MSR_EE) == 0;
188 static inline bool arch_irqs_disabled(void)
190 return arch_irqs_disabled_flags(arch_local_save_flags());
193 #define hard_irq_disable() arch_local_irq_disable()
195 static inline bool arch_irq_disabled_regs(struct pt_regs *regs)
197 return !(regs->msr & MSR_EE);
200 static inline void may_hard_irq_enable(void) { }
202 #endif /* CONFIG_PPC64 */
204 #define ARCH_IRQ_INIT_FLAGS IRQ_NOREQUEST
207 * interrupt-retrigger: should we handle this via lost interrupts and IPIs
208 * or should we not care like we do now ? --BenH.
212 #endif /* __ASSEMBLY__ */
213 #endif /* __KERNEL__ */
214 #endif /* _ASM_POWERPC_HW_IRQ_H */