blob: baea40e695ecb3c0f3d7c47a1a582a8106789cbc [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
3 *
4 * Use inline IRQs where possible - Anton Blanchard <anton@au.ibm.com>
5 *
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.
10 */
11#ifdef __KERNEL__
12#ifndef _PPC64_HW_IRQ_H
13#define _PPC64_HW_IRQ_H
14
15#include <linux/config.h>
16#include <linux/errno.h>
17#include <asm/irq.h>
18
19int timer_interrupt(struct pt_regs *);
20extern void ppc_irq_dispatch_handler(struct pt_regs *regs, int irq);
21
22#ifdef CONFIG_PPC_ISERIES
23
24extern unsigned long local_get_flags(void);
25extern unsigned long local_irq_disable(void);
26extern void local_irq_restore(unsigned long);
27
28#define local_irq_enable() local_irq_restore(1)
29#define local_save_flags(flags) ((flags) = local_get_flags())
30#define local_irq_save(flags) ((flags) = local_irq_disable())
31
32#define irqs_disabled() (local_get_flags() == 0)
33
34#else
35
36#define local_save_flags(flags) ((flags) = mfmsr())
37#define local_irq_restore(flags) do { \
38 __asm__ __volatile__("": : :"memory"); \
39 __mtmsrd((flags), 1); \
40} while(0)
41
42static inline void local_irq_disable(void)
43{
44 unsigned long msr;
45 msr = mfmsr();
46 __mtmsrd(msr & ~MSR_EE, 1);
47 __asm__ __volatile__("": : :"memory");
48}
49
50static inline void local_irq_enable(void)
51{
52 unsigned long msr;
53 __asm__ __volatile__("": : :"memory");
54 msr = mfmsr();
55 __mtmsrd(msr | MSR_EE, 1);
56}
57
58static inline void __do_save_and_cli(unsigned long *flags)
59{
60 unsigned long msr;
61 msr = mfmsr();
62 *flags = msr;
63 __mtmsrd(msr & ~MSR_EE, 1);
64 __asm__ __volatile__("": : :"memory");
65}
66
67#define local_irq_save(flags) __do_save_and_cli(&flags)
68
69#define irqs_disabled() \
70({ \
71 unsigned long flags; \
72 local_save_flags(flags); \
73 !(flags & MSR_EE); \
74})
75
76#endif /* CONFIG_PPC_ISERIES */
77
78#define mask_irq(irq) \
79 ({ \
80 irq_desc_t *desc = get_irq_desc(irq); \
81 if (desc->handler && desc->handler->disable) \
82 desc->handler->disable(irq); \
83 })
84#define unmask_irq(irq) \
85 ({ \
86 irq_desc_t *desc = get_irq_desc(irq); \
87 if (desc->handler && desc->handler->enable) \
88 desc->handler->enable(irq); \
89 })
90#define ack_irq(irq) \
91 ({ \
92 irq_desc_t *desc = get_irq_desc(irq); \
93 if (desc->handler && desc->handler->ack) \
94 desc->handler->ack(irq); \
95 })
96
97/* Should we handle this via lost interrupts and IPIs or should we don't care like
98 * we do now ? --BenH.
99 */
100struct hw_interrupt_type;
101static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {}
102
103#endif /* _PPC64_HW_IRQ_H */
104#endif /* __KERNEL__ */