summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/include/asm/hw_irq.h
blob: bb712c9488b3c74bcfb6f36c47322044e9c0992d (plain)
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
/*
 * 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 arch_local_save_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 arch_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 arch_local_irq_restore(unsigned long);
extern void iseries_handle_interrupts(void);

static inline void arch_local_irq_enable(void)
{
	arch_local_irq_restore(1);
}

static inline unsigned long arch_local_irq_save(void)
{
	return arch_local_irq_disable();
}

static inline bool arch_irqs_disabled_flags(unsigned long flags)
{
	return flags == 0;
}

static inline bool arch_irqs_disabled(void)
{
	return arch_irqs_disabled_flags(arch_local_save_flags());
}

#ifdef CONFIG_PPC_BOOK3E
#define __hard_irq_enable()	asm volatile("wrteei 1" : : : "memory");
#define __hard_irq_disable()	asm volatile("wrteei 0" : : : "memory");
#else
#define __hard_irq_enable()	__mtmsrd(mfmsr() | MSR_EE, 1)
#define __hard_irq_disable()	__mtmsrd(mfmsr() & ~MSR_EE, 1)
#endif

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

#else /* CONFIG_PPC64 */

#define SET_MSR_EE(x)	mtmsr(x)

static inline unsigned long arch_local_save_flags(void)
{
	return mfmsr();
}

static inline void arch_local_irq_restore(unsigned long flags)
{
#if defined(CONFIG_BOOKE)
	asm volatile("wrtee %0" : : "r" (flags) : "memory");
#else
	mtmsr(flags);
#endif
}

static inline unsigned long arch_local_irq_save(void)
{
	unsigned long flags = arch_local_save_flags();
#ifdef CONFIG_BOOKE
	asm volatile("wrteei 0" : : : "memory");
#else
	SET_MSR_EE(flags & ~MSR_EE);
#endif
	return flags;
}

static inline void arch_local_irq_disable(void)
{
#ifdef CONFIG_BOOKE
	asm volatile("wrteei 0" : : : "memory");
#else
	arch_local_irq_save();
#endif
}

static inline void arch_local_irq_enable(void)
{
#ifdef CONFIG_BOOKE
	asm volatile("wrteei 1" : : : "memory");
#else
	unsigned long msr = mfmsr();
	SET_MSR_EE(msr | MSR_EE);
#endif
}

static inline bool arch_irqs_disabled_flags(unsigned long flags)
{
	return (flags & MSR_EE) == 0;
}

static inline bool arch_irqs_disabled(void)
{
	return arch_irqs_disabled_flags(arch_local_save_flags());
}

#define hard_irq_disable()		arch_local_irq_disable()

#endif /* CONFIG_PPC64 */

#define ARCH_IRQ_INIT_FLAGS	IRQ_NOREQUEST

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

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