aboutsummaryrefslogtreecommitdiffstats
path: root/arch/powerpc/include/asm/hw_irq.h
blob: 8b505eaaa38a173b0f86154654879ad914d35fb7 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
/*
 * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
 */
#ifndef _ASM_POWERPC_HW_IRQ_H
#define _ASM_POWERPC_HW_IRQ_H

#ifdef __KERNEL__

#include <linux/errno.h>
#include <linux/compiler.h>
#include <asm/ptrace.h>
#include <asm/processor.h>

extern void timer_interrupt(struct pt_regs *);

#ifdef CONFIG_PPC64
#include <asm/paca.h>

static inline unsigned long local_get_flags(void)
{
	unsigned long flags;

	__asm__ __volatile__("lbz %0,%1(13)"
	: "=r" (flags)
	: "i" (offsetof(struct paca_struct, soft_enabled)));

	return flags;
}

static inline unsigned long raw_local_irq_disable(void)
{
	unsigned long flags, zero;

	__asm__ __volatile__("li %1,0; lbz %0,%2(13); stb %1,%2(13)"
	: "=r" (flags), "=&r" (zero)
	: "i" (offsetof(struct paca_struct, soft_enabled))
	: "memory");

	return flags;
}

extern void raw_local_irq_restore(unsigned long);
extern void iseries_handle_interrupts(void);

#define raw_local_irq_enable()		raw_local_irq_restore(1)
#define raw_local_save_flags(flags)	((flags) = local_get_flags())
#define raw_local_irq_save(flags)	((flags) = raw_local_irq_disable())

#define raw_irqs_disabled()		(local_get_flags() == 0)
#define raw_irqs_disabled_flags(flags)	((flags) == 0)

#define __hard_irq_enable()	__mtmsrd(mfmsr() | MSR_EE, 1)
#define __hard_irq_disable()	__mtmsrd(mfmsr() & ~MSR_EE, 1)

#define  hard_irq_disable()			\
	do {					\
		__hard_irq_disable();		\
		get_paca()->soft_enabled = 0;	\
		get_paca()->hard_enabled = 0;	\
	} while(0)

static inline int irqs_disabled_flags(unsigned long flags)
{
	return flags == 0;
}

#else

#if defined(CONFIG_BOOKE)
#define SET_MSR_EE(x)	mtmsr(x)
#define raw_local_irq_restore(flags)	__asm__ __volatile__("wrtee %0" : : "r" (flags) : "memory")
#else
#define SET_MSR_EE(x)	mtmsr(x)
#define raw_local_irq_restore(flags)	mtmsr(flags)
#endif

static inline void raw_local_irq_disable(void)
{
#ifdef CONFIG_BOOKE
	__asm__ __volatile__("wrteei 0": : :"memory");
#else
	unsigned long msr;

	msr = mfmsr();
	SET_MSR_EE(msr & ~MSR_EE);
#endif
}

static inline void raw_local_irq_enable(void)
{
#ifdef CONFIG_BOOKE
	__asm__ __volatile__("wrteei 1": : :"memory");
#else
	unsigned long msr;

	msr = mfmsr();
	SET_MSR_EE(msr | MSR_EE);
#endif
}

static inline void raw_local_irq_save_ptr(unsigned long *flags)
{
	unsigned long msr;
	msr = mfmsr();
	*flags = msr;
#ifdef CONFIG_BOOKE
	__asm__ __volatile__("wrteei 0": : :"memory");
#else
	SET_MSR_EE(msr & ~MSR_EE);
#endif
}

#define raw_local_save_flags(flags)	((flags) = mfmsr())
#define raw_local_irq_save(flags)	raw_local_irq_save_ptr(&flags)
#define raw_irqs_disabled()		((mfmsr() & MSR_EE) == 0)
#define raw_irqs_disabled_flags(flags)	(((flags) & MSR_EE) == 0)

#define hard_irq_disable()		raw_local_irq_disable()

static inline int irqs_disabled_flags(unsigned long flags)
{
	return (flags & MSR_EE) == 0;
}

#endif /* CONFIG_PPC64 */

/*
 * interrupt-retrigger: should we handle this via lost interrupts and IPIs
 * or should we not care like we do now ? --BenH.
 */
struct irq_chip;

#ifdef CONFIG_PERF_COUNTERS

#ifdef CONFIG_PPC64
static inline unsigned long test_perf_counter_pending(void)
{
	unsigned long x;

	asm volatile("lbz %0,%1(13)"
		: "=r" (x)
		: "i" (offsetof(struct paca_struct, perf_counter_pending)));
	return x;
}

static inline void set_perf_counter_pending(void)
{
	asm volatile("stb %0,%1(13)" : :
		"r" (1),
		"i" (offsetof(struct paca_struct, perf_counter_pending)));
}

static inline void clear_perf_counter_pending(void)
{
	asm volatile("stb %0,%1(13)" : :
		"r" (0),
		"i" (offsetof(struct paca_struct, perf_counter_pending)));
}
#endif /* CONFIG_PPC64 */

#else  /* CONFIG_PERF_COUNTERS */

static inline unsigned long test_perf_counter_pending(void)
{
	return 0;
}

static inline void clear_perf_counter_pending(void) {}
#endif /* CONFIG_PERF_COUNTERS */

#endif	/* __KERNEL__ */
#endif	/* _ASM_POWERPC_HW_IRQ_H */