1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 /*
3 * Copyright IBM Corp. 2006, 2010
4 * Author(s): Martin Schwidefsky <schwidefs
5 */
6
7 #ifndef __ASM_IRQFLAGS_H
8 #define __ASM_IRQFLAGS_H
9
10 #include <linux/types.h>
11
12 #define ARCH_IRQ_ENABLED (3UL << (BITS_
13
14 /* store then OR system mask. */
15 #define __arch_local_irq_stosm(__or)
16 ({
17 unsigned long __mask;
18 asm volatile(
19 " stosm %0,%1"
20 : "=Q" (__mask) : "i" (__or) :
21 __mask;
22 })
23
24 /* store then AND system mask. */
25 #define __arch_local_irq_stnsm(__and)
26 ({
27 unsigned long __mask;
28 asm volatile(
29 " stnsm %0,%1"
30 : "=Q" (__mask) : "i" (__and)
31 __mask;
32 })
33
34 /* set system mask. */
35 static __always_inline void __arch_local_irq_s
36 {
37 asm volatile("ssm %0" : : "Q" (flags
38 }
39
40 #ifdef CONFIG_KMSAN
41 #define arch_local_irq_attributes noinline not
42 #else
43 #define arch_local_irq_attributes __always_inl
44 #endif
45
46 static arch_local_irq_attributes unsigned long
47 {
48 return __arch_local_irq_stnsm(0xff);
49 }
50
51 static arch_local_irq_attributes unsigned long
52 {
53 return __arch_local_irq_stnsm(0xfc);
54 }
55
56 static __always_inline void arch_local_irq_dis
57 {
58 arch_local_irq_save();
59 }
60
61 static arch_local_irq_attributes void arch_loc
62 {
63 __arch_local_irq_stosm(0x01);
64 }
65
66 static arch_local_irq_attributes void arch_loc
67 {
68 __arch_local_irq_stosm(0x03);
69 }
70
71 /* This only restores external and I/O interru
72 static __always_inline void arch_local_irq_res
73 {
74 /* only disabled->disabled and disable
75 if (flags & ARCH_IRQ_ENABLED)
76 arch_local_irq_enable();
77 }
78
79 static __always_inline bool arch_irqs_disabled
80 {
81 return !(flags & ARCH_IRQ_ENABLED);
82 }
83
84 static __always_inline bool arch_irqs_disabled
85 {
86 return arch_irqs_disabled_flags(arch_l
87 }
88
89 #endif /* __ASM_IRQFLAGS_H */
90
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