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2
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4
5#ifndef _ASM_POWERPC_HW_IRQ_H
6#define _ASM_POWERPC_HW_IRQ_H
7
8#ifdef __KERNEL__
9
10#include <linux/errno.h>
11#include <linux/compiler.h>
12#include <asm/ptrace.h>
13#include <asm/processor.h>
14
15#ifdef CONFIG_PPC64
16
17
18
19
20
21
22
23
24#define PACA_IRQ_HARD_DIS 0x01
25#define PACA_IRQ_DBELL 0x02
26#define PACA_IRQ_EE 0x04
27#define PACA_IRQ_DEC 0x08
28#define PACA_IRQ_EE_EDGE 0x10
29#define PACA_IRQ_HMI 0x20
30
31#endif
32
33#ifndef __ASSEMBLY__
34
35extern void __replay_interrupt(unsigned int vector);
36
37extern void timer_interrupt(struct pt_regs *);
38extern void performance_monitor_exception(struct pt_regs *regs);
39extern void WatchdogException(struct pt_regs *regs);
40extern void unknown_exception(struct pt_regs *regs);
41
42#ifdef CONFIG_PPC64
43#include <asm/paca.h>
44
45static inline unsigned long arch_local_save_flags(void)
46{
47 unsigned long flags;
48
49 asm volatile(
50 "lbz %0,%1(13)"
51 : "=r" (flags)
52 : "i" (offsetof(struct paca_struct, soft_enabled)));
53
54 return flags;
55}
56
57static inline unsigned long arch_local_irq_disable(void)
58{
59 unsigned long flags, zero;
60
61 asm volatile(
62 "li %1,0; lbz %0,%2(13); stb %1,%2(13)"
63 : "=r" (flags), "=&r" (zero)
64 : "i" (offsetof(struct paca_struct, soft_enabled))
65 : "memory");
66
67 return flags;
68}
69
70extern void arch_local_irq_restore(unsigned long);
71
72static inline void arch_local_irq_enable(void)
73{
74 arch_local_irq_restore(1);
75}
76
77static inline unsigned long arch_local_irq_save(void)
78{
79 return arch_local_irq_disable();
80}
81
82static inline bool arch_irqs_disabled_flags(unsigned long flags)
83{
84 return flags == 0;
85}
86
87static inline bool arch_irqs_disabled(void)
88{
89 return arch_irqs_disabled_flags(arch_local_save_flags());
90}
91
92#ifdef CONFIG_PPC_BOOK3E
93#define __hard_irq_enable() asm volatile("wrteei 1" : : : "memory")
94#define __hard_irq_disable() asm volatile("wrteei 0" : : : "memory")
95#else
96#define __hard_irq_enable() __mtmsrd(local_paca->kernel_msr | MSR_EE, 1)
97#define __hard_irq_disable() __mtmsrd(local_paca->kernel_msr, 1)
98#endif
99
100#define hard_irq_disable() do { \
101 u8 _was_enabled; \
102 __hard_irq_disable(); \
103 _was_enabled = local_paca->soft_enabled; \
104 local_paca->soft_enabled = 0; \
105 local_paca->irq_happened |= PACA_IRQ_HARD_DIS; \
106 if (_was_enabled) \
107 trace_hardirqs_off(); \
108} while(0)
109
110static inline bool lazy_irq_pending(void)
111{
112 return !!(get_paca()->irq_happened & ~PACA_IRQ_HARD_DIS);
113}
114
115
116
117
118
119
120static inline void may_hard_irq_enable(void)
121{
122 get_paca()->irq_happened &= ~PACA_IRQ_HARD_DIS;
123 if (!(get_paca()->irq_happened & PACA_IRQ_EE))
124 __hard_irq_enable();
125}
126
127static inline bool arch_irq_disabled_regs(struct pt_regs *regs)
128{
129 return !regs->softe;
130}
131
132extern bool prep_irq_for_idle(void);
133extern bool prep_irq_for_idle_irqsoff(void);
134extern void irq_set_pending_from_srr1(unsigned long srr1);
135
136#define fini_irq_for_idle_irqsoff() trace_hardirqs_off();
137
138extern void force_external_irq_replay(void);
139
140#else
141
142#define SET_MSR_EE(x) mtmsr(x)
143
144static inline unsigned long arch_local_save_flags(void)
145{
146 return mfmsr();
147}
148
149static inline void arch_local_irq_restore(unsigned long flags)
150{
151#if defined(CONFIG_BOOKE)
152 asm volatile("wrtee %0" : : "r" (flags) : "memory");
153#else
154 mtmsr(flags);
155#endif
156}
157
158static inline unsigned long arch_local_irq_save(void)
159{
160 unsigned long flags = arch_local_save_flags();
161#ifdef CONFIG_BOOKE
162 asm volatile("wrteei 0" : : : "memory");
163#elif defined(CONFIG_PPC_8xx)
164 wrtspr(SPRN_EID);
165#else
166 SET_MSR_EE(flags & ~MSR_EE);
167#endif
168 return flags;
169}
170
171static inline void arch_local_irq_disable(void)
172{
173#ifdef CONFIG_BOOKE
174 asm volatile("wrteei 0" : : : "memory");
175#elif defined(CONFIG_PPC_8xx)
176 wrtspr(SPRN_EID);
177#else
178 arch_local_irq_save();
179#endif
180}
181
182static inline void arch_local_irq_enable(void)
183{
184#ifdef CONFIG_BOOKE
185 asm volatile("wrteei 1" : : : "memory");
186#elif defined(CONFIG_PPC_8xx)
187 wrtspr(SPRN_EIE);
188#else
189 unsigned long msr = mfmsr();
190 SET_MSR_EE(msr | MSR_EE);
191#endif
192}
193
194static inline bool arch_irqs_disabled_flags(unsigned long flags)
195{
196 return (flags & MSR_EE) == 0;
197}
198
199static inline bool arch_irqs_disabled(void)
200{
201 return arch_irqs_disabled_flags(arch_local_save_flags());
202}
203
204#define hard_irq_disable() arch_local_irq_disable()
205
206static inline bool arch_irq_disabled_regs(struct pt_regs *regs)
207{
208 return !(regs->msr & MSR_EE);
209}
210
211static inline void may_hard_irq_enable(void) { }
212
213#endif
214
215#define ARCH_IRQ_INIT_FLAGS IRQ_NOREQUEST
216
217
218
219
220
221struct irq_chip;
222
223#endif
224#endif
225#endif
226