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#ifndef _ASM_POWERPC_HW_IRQ_H
5#define _ASM_POWERPC_HW_IRQ_H
6
7#ifdef __KERNEL__
8
9#include <linux/errno.h>
10#include <linux/compiler.h>
11#include <asm/ptrace.h>
12#include <asm/processor.h>
13
14extern void timer_interrupt(struct pt_regs *);
15
16#ifdef CONFIG_PPC64
17#include <asm/paca.h>
18
19static inline unsigned long arch_local_save_flags(void)
20{
21 unsigned long flags;
22
23 asm volatile(
24 "lbz %0,%1(13)"
25 : "=r" (flags)
26 : "i" (offsetof(struct paca_struct, soft_enabled)));
27
28 return flags;
29}
30
31static inline unsigned long arch_local_irq_disable(void)
32{
33 unsigned long flags, zero;
34
35 asm volatile(
36 "li %1,0; lbz %0,%2(13); stb %1,%2(13)"
37 : "=r" (flags), "=&r" (zero)
38 : "i" (offsetof(struct paca_struct, soft_enabled))
39 : "memory");
40
41 return flags;
42}
43
44extern void arch_local_irq_restore(unsigned long);
45extern void iseries_handle_interrupts(void);
46
47static inline void arch_local_irq_enable(void)
48{
49 arch_local_irq_restore(1);
50}
51
52static inline unsigned long arch_local_irq_save(void)
53{
54 return arch_local_irq_disable();
55}
56
57static inline bool arch_irqs_disabled_flags(unsigned long flags)
58{
59 return flags == 0;
60}
61
62static inline bool arch_irqs_disabled(void)
63{
64 return arch_irqs_disabled_flags(arch_local_save_flags());
65}
66
67#ifdef CONFIG_PPC_BOOK3E
68#define __hard_irq_enable() asm volatile("wrteei 1" : : : "memory");
69#define __hard_irq_disable() asm volatile("wrteei 0" : : : "memory");
70#else
71#define __hard_irq_enable() __mtmsrd(mfmsr() | MSR_EE, 1)
72#define __hard_irq_disable() __mtmsrd(mfmsr() & ~MSR_EE, 1)
73#endif
74
75#define hard_irq_disable() \
76 do { \
77 __hard_irq_disable(); \
78 get_paca()->soft_enabled = 0; \
79 get_paca()->hard_enabled = 0; \
80 } while(0)
81
82#else /* CONFIG_PPC64 */
83
84#define SET_MSR_EE(x) mtmsr(x)
85
86static inline unsigned long arch_local_save_flags(void)
87{
88 return mfmsr();
89}
90
91static inline void arch_local_irq_restore(unsigned long flags)
92{
93#if defined(CONFIG_BOOKE)
94 asm volatile("wrtee %0" : : "r" (flags) : "memory");
95#else
96 mtmsr(flags);
97#endif
98}
99
100static inline unsigned long arch_local_irq_save(void)
101{
102 unsigned long flags = arch_local_save_flags();
103#ifdef CONFIG_BOOKE
104 asm volatile("wrteei 0" : : : "memory");
105#else
106 SET_MSR_EE(flags & ~MSR_EE);
107#endif
108 return flags;
109}
110
111static inline void arch_local_irq_disable(void)
112{
113#ifdef CONFIG_BOOKE
114 asm volatile("wrteei 0" : : : "memory");
115#else
116 arch_local_irq_save();
117#endif
118}
119
120static inline void arch_local_irq_enable(void)
121{
122#ifdef CONFIG_BOOKE
123 asm volatile("wrteei 1" : : : "memory");
124#else
125 unsigned long msr = mfmsr();
126 SET_MSR_EE(msr | MSR_EE);
127#endif
128}
129
130static inline bool arch_irqs_disabled_flags(unsigned long flags)
131{
132 return (flags & MSR_EE) == 0;
133}
134
135static inline bool arch_irqs_disabled(void)
136{
137 return arch_irqs_disabled_flags(arch_local_save_flags());
138}
139
140#define hard_irq_disable() arch_local_irq_disable()
141
142#endif /* CONFIG_PPC64 */
143
144#define ARCH_IRQ_INIT_FLAGS IRQ_NOREQUEST
145
146/*
147 * interrupt-retrigger: should we handle this via lost interrupts and IPIs
148 * or should we not care like we do now ? --BenH.
149 */
150struct irq_chip;
151
152#endif /* __KERNEL__ */
153#endif /* _ASM_POWERPC_HW_IRQ_H */