tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
3 */
4#ifdef __KERNEL__
5#ifndef _PPC_HW_IRQ_H
6#define _PPC_HW_IRQ_H
7
8#include <asm/ptrace.h>
9#include <asm/reg.h>
10
11extern void timer_interrupt(struct pt_regs *);
12
13#define INLINE_IRQS
14
15#define irqs_disabled() ((mfmsr() & MSR_EE) == 0)
16
17#ifdef INLINE_IRQS
18
19static inline void local_irq_disable(void)
20{
21 unsigned long msr;
22 msr = mfmsr();
23 mtmsr(msr & ~MSR_EE);
24 __asm__ __volatile__("": : :"memory");
25}
26
27static inline void local_irq_enable(void)
28{
29 unsigned long msr;
30 __asm__ __volatile__("": : :"memory");
31 msr = mfmsr();
32 mtmsr(msr | MSR_EE);
33}
34
35static inline void local_irq_save_ptr(unsigned long *flags)
36{
37 unsigned long msr;
38 msr = mfmsr();
39 *flags = msr;
40 mtmsr(msr & ~MSR_EE);
41 __asm__ __volatile__("": : :"memory");
42}
43
44#define local_save_flags(flags) ((flags) = mfmsr())
45#define local_irq_save(flags) local_irq_save_ptr(&flags)
46#define local_irq_restore(flags) mtmsr(flags)
47
48#else
49
50extern void local_irq_enable(void);
51extern void local_irq_disable(void);
52extern void local_irq_restore(unsigned long);
53extern void local_save_flags_ptr(unsigned long *);
54
55#define local_save_flags(flags) local_save_flags_ptr(&flags)
56#define local_irq_save(flags) ({local_save_flags(flags);local_irq_disable();})
57
58#endif
59
60extern void do_lost_interrupts(unsigned long);
61
62#define mask_irq(irq) ({if (irq_desc[irq].handler && irq_desc[irq].handler->disable) irq_desc[irq].handler->disable(irq);})
63#define unmask_irq(irq) ({if (irq_desc[irq].handler && irq_desc[irq].handler->enable) irq_desc[irq].handler->enable(irq);})
64#define ack_irq(irq) ({if (irq_desc[irq].handler && irq_desc[irq].handler->ack) irq_desc[irq].handler->ack(irq);})
65
66/* Should we handle this via lost interrupts and IPIs or should we don't care like
67 * we do now ? --BenH.
68 */
69struct hw_interrupt_type;
70static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {}
71
72
73#endif /* _PPC_HW_IRQ_H */
74#endif /* __KERNEL__ */