NFSv4.1/flexfiles: Fix a protocol error in layoutreturn
[linux/fpc-iii.git] / arch / blackfin / include / asm / irqflags.h
blob07aff230a8128bb4561991beb8682bdace64c744
1 /*
2 * interface to Blackfin CEC
4 * Copyright 2009 Analog Devices Inc.
5 * Licensed under the GPL-2 or later.
6 */
8 #ifndef __ASM_BFIN_IRQFLAGS_H__
9 #define __ASM_BFIN_IRQFLAGS_H__
11 #include <mach/blackfin.h>
13 #ifdef CONFIG_SMP
14 # include <asm/pda.h>
15 # include <asm/processor.h>
16 # define bfin_irq_flags cpu_pda[blackfin_core_id()].imask
17 #else
18 extern unsigned long bfin_irq_flags;
19 #endif
21 static inline notrace void bfin_sti(unsigned long flags)
23 asm volatile("sti %0;" : : "d" (flags));
26 static inline notrace unsigned long bfin_cli(void)
28 unsigned long flags;
29 asm volatile("cli %0;" : "=d" (flags));
30 return flags;
33 #ifdef CONFIG_DEBUG_HWERR
34 # define bfin_no_irqs 0x3f
35 #else
36 # define bfin_no_irqs 0x1f
37 #endif
39 /*****************************************************************************/
41 * Hard, untraced CPU interrupt flag manipulation and access.
43 static inline notrace void __hard_local_irq_disable(void)
45 bfin_cli();
48 static inline notrace void __hard_local_irq_enable(void)
50 bfin_sti(bfin_irq_flags);
53 static inline notrace unsigned long hard_local_save_flags(void)
55 return bfin_read_IMASK();
58 static inline notrace unsigned long __hard_local_irq_save(void)
60 unsigned long flags;
61 flags = bfin_cli();
62 #ifdef CONFIG_DEBUG_HWERR
63 bfin_sti(0x3f);
64 #endif
65 return flags;
68 static inline notrace int hard_irqs_disabled_flags(unsigned long flags)
70 #ifdef CONFIG_BF60x
71 return (flags & IMASK_IVG11) == 0;
72 #else
73 return (flags & ~0x3f) == 0;
74 #endif
77 static inline notrace int hard_irqs_disabled(void)
79 unsigned long flags = hard_local_save_flags();
80 return hard_irqs_disabled_flags(flags);
83 static inline notrace void __hard_local_irq_restore(unsigned long flags)
85 if (!hard_irqs_disabled_flags(flags))
86 __hard_local_irq_enable();
89 /*****************************************************************************/
91 * Interrupt pipe handling.
93 #ifdef CONFIG_IPIPE
95 #include <linux/compiler.h>
96 #include <linux/ipipe_trace.h>
98 * Way too many inter-deps between low-level headers in this port, so
99 * we redeclare the required bits we cannot pick from
100 * <asm/ipipe_base.h> to prevent circular dependencies.
102 void __ipipe_stall_root(void);
103 void __ipipe_unstall_root(void);
104 unsigned long __ipipe_test_root(void);
105 unsigned long __ipipe_test_and_stall_root(void);
106 void __ipipe_restore_root(unsigned long flags);
108 #ifdef CONFIG_IPIPE_DEBUG_CONTEXT
109 struct ipipe_domain;
110 extern struct ipipe_domain ipipe_root;
111 void ipipe_check_context(struct ipipe_domain *ipd);
112 #define __check_irqop_context(ipd) ipipe_check_context(&ipipe_root)
113 #else /* !CONFIG_IPIPE_DEBUG_CONTEXT */
114 #define __check_irqop_context(ipd) do { } while (0)
115 #endif /* !CONFIG_IPIPE_DEBUG_CONTEXT */
118 * Interrupt pipe interface to linux/irqflags.h.
120 static inline notrace void arch_local_irq_disable(void)
122 __check_irqop_context();
123 __ipipe_stall_root();
124 barrier();
127 static inline notrace void arch_local_irq_enable(void)
129 barrier();
130 __check_irqop_context();
131 __ipipe_unstall_root();
134 static inline notrace unsigned long arch_local_save_flags(void)
136 return __ipipe_test_root() ? bfin_no_irqs : bfin_irq_flags;
139 static inline notrace int arch_irqs_disabled_flags(unsigned long flags)
141 return flags == bfin_no_irqs;
144 static inline notrace unsigned long arch_local_irq_save(void)
146 unsigned long flags;
148 __check_irqop_context();
149 flags = __ipipe_test_and_stall_root() ? bfin_no_irqs : bfin_irq_flags;
150 barrier();
152 return flags;
155 static inline notrace void arch_local_irq_restore(unsigned long flags)
157 __check_irqop_context();
158 __ipipe_restore_root(flags == bfin_no_irqs);
161 static inline notrace unsigned long arch_mangle_irq_bits(int virt, unsigned long real)
164 * Merge virtual and real interrupt mask bits into a single
165 * 32bit word.
167 return (real & ~(1 << 31)) | ((virt != 0) << 31);
170 static inline notrace int arch_demangle_irq_bits(unsigned long *x)
172 int virt = (*x & (1 << 31)) != 0;
173 *x &= ~(1L << 31);
174 return virt;
178 * Interface to various arch routines that may be traced.
180 #ifdef CONFIG_IPIPE_TRACE_IRQSOFF
181 static inline notrace void hard_local_irq_disable(void)
183 if (!hard_irqs_disabled()) {
184 __hard_local_irq_disable();
185 ipipe_trace_begin(0x80000000);
189 static inline notrace void hard_local_irq_enable(void)
191 if (hard_irqs_disabled()) {
192 ipipe_trace_end(0x80000000);
193 __hard_local_irq_enable();
197 static inline notrace unsigned long hard_local_irq_save(void)
199 unsigned long flags = hard_local_save_flags();
200 if (!hard_irqs_disabled_flags(flags)) {
201 __hard_local_irq_disable();
202 ipipe_trace_begin(0x80000001);
204 return flags;
207 static inline notrace void hard_local_irq_restore(unsigned long flags)
209 if (!hard_irqs_disabled_flags(flags)) {
210 ipipe_trace_end(0x80000001);
211 __hard_local_irq_enable();
215 #else /* !CONFIG_IPIPE_TRACE_IRQSOFF */
216 # define hard_local_irq_disable() __hard_local_irq_disable()
217 # define hard_local_irq_enable() __hard_local_irq_enable()
218 # define hard_local_irq_save() __hard_local_irq_save()
219 # define hard_local_irq_restore(flags) __hard_local_irq_restore(flags)
220 #endif /* !CONFIG_IPIPE_TRACE_IRQSOFF */
222 #define hard_local_irq_save_cond() hard_local_irq_save()
223 #define hard_local_irq_restore_cond(flags) hard_local_irq_restore(flags)
225 #else /* !CONFIG_IPIPE */
228 * Direct interface to linux/irqflags.h.
230 #define arch_local_save_flags() hard_local_save_flags()
231 #define arch_local_irq_save() __hard_local_irq_save()
232 #define arch_local_irq_restore(flags) __hard_local_irq_restore(flags)
233 #define arch_local_irq_enable() __hard_local_irq_enable()
234 #define arch_local_irq_disable() __hard_local_irq_disable()
235 #define arch_irqs_disabled_flags(flags) hard_irqs_disabled_flags(flags)
236 #define arch_irqs_disabled() hard_irqs_disabled()
239 * Interface to various arch routines that may be traced.
241 #define hard_local_irq_save() __hard_local_irq_save()
242 #define hard_local_irq_restore(flags) __hard_local_irq_restore(flags)
243 #define hard_local_irq_enable() __hard_local_irq_enable()
244 #define hard_local_irq_disable() __hard_local_irq_disable()
245 #define hard_local_irq_save_cond() hard_local_save_flags()
246 #define hard_local_irq_restore_cond(flags) do { (void)(flags); } while (0)
248 #endif /* !CONFIG_IPIPE */
250 #ifdef CONFIG_SMP
251 #define hard_local_irq_save_smp() hard_local_irq_save()
252 #define hard_local_irq_restore_smp(flags) hard_local_irq_restore(flags)
253 #else
254 #define hard_local_irq_save_smp() hard_local_save_flags()
255 #define hard_local_irq_restore_smp(flags) do { (void)(flags); } while (0)
256 #endif
259 * Remap the arch-neutral IRQ state manipulation macros to the
260 * blackfin-specific hard_local_irq_* API.
262 #define local_irq_save_hw(flags) \
263 do { \
264 (flags) = hard_local_irq_save(); \
265 } while (0)
266 #define local_irq_restore_hw(flags) \
267 do { \
268 hard_local_irq_restore(flags); \
269 } while (0)
270 #define local_irq_disable_hw() \
271 do { \
272 hard_local_irq_disable(); \
273 } while (0)
274 #define local_irq_enable_hw() \
275 do { \
276 hard_local_irq_enable(); \
277 } while (0)
278 #define local_irq_save_hw_notrace(flags) \
279 do { \
280 (flags) = __hard_local_irq_save(); \
281 } while (0)
282 #define local_irq_restore_hw_notrace(flags) \
283 do { \
284 __hard_local_irq_restore(flags); \
285 } while (0)
287 #define irqs_disabled_hw() hard_irqs_disabled()
289 #endif