2 * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
4 * Use inline IRQs where possible - Anton Blanchard <anton@au.ibm.com>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
12 #ifndef _PPC64_HW_IRQ_H
13 #define _PPC64_HW_IRQ_H
15 #include <linux/config.h>
16 #include <linux/errno.h>
19 int timer_interrupt(struct pt_regs *);
20 extern void ppc_irq_dispatch_handler(struct pt_regs *regs, int irq);
22 #ifdef CONFIG_PPC_ISERIES
24 extern void __no_use_sti(void);
25 extern void __no_use_cli(void);
26 extern void __no_use_restore_flags(unsigned long);
27 extern unsigned long __no_use_save_flags(void);
28 extern void __no_use_set_lost(unsigned long);
29 extern void __no_lpq_restore_flags(unsigned long);
31 #define local_irq_disable() __no_use_cli()
32 #define local_irq_enable() __no_use_sti()
33 #define local_save_flags(flags) ((flags) = __no_use_save_flags())
34 #define local_irq_restore(flags) __no_use_restore_flags((unsigned long)flags)
35 #define local_irq_save(flags) ({local_save_flags(flags);local_irq_disable();})
39 #define local_save_flags(flags) ((flags) = mfmsr())
40 #define local_irq_restore(flags) do { \
41 __asm__ __volatile__("": : :"memory"); \
42 __mtmsrd((flags), 1); \
45 static inline void local_irq_disable(void)
49 __mtmsrd(msr & ~MSR_EE, 1);
50 __asm__ __volatile__("": : :"memory");
53 static inline void local_irq_enable(void)
56 __asm__ __volatile__("": : :"memory");
58 __mtmsrd(msr | MSR_EE, 1);
61 static inline void __do_save_and_cli(unsigned long *flags)
66 __mtmsrd(msr & ~MSR_EE, 1);
67 __asm__ __volatile__("": : :"memory");
70 #define local_irq_save(flags) __do_save_and_cli(&flags)
72 #endif /* CONFIG_PPC_ISERIES */
74 #define mask_irq(irq) ({if (irq_desc[irq].handler && irq_desc[irq].handler->disable) irq_desc[irq].handler->disable(irq);})
75 #define unmask_irq(irq) ({if (irq_desc[irq].handler && irq_desc[irq].handler->enable) irq_desc[irq].handler->enable(irq);})
76 #define ack_irq(irq) ({if (irq_desc[irq].handler && irq_desc[irq].handler->ack) irq_desc[irq].handler->ack(irq);})
78 /* Should we handle this via lost interrupts and IPIs or should we don't care like
81 struct hw_interrupt_type;
82 static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {}
84 extern irq_desc_t irq_desc [NR_IRQS];
86 #endif /* _PPC64_HW_IRQ_H */
87 #endif /* __KERNEL__ */