1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) 2006 Atmark Techno, Inc.
4 */
5
6 #ifndef _ASM_MICROBLAZE_IRQFLAGS_H
7 #define _ASM_MICROBLAZE_IRQFLAGS_H
8
9 #include <linux/types.h>
10 #include <asm/registers.h>
11
12 #if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
13
14 static inline notrace unsigned long arch_local_irq_save(void)
15 {
16 unsigned long flags;
17 asm volatile(" msrclr %0, %1 \n"
18 " nop \n"
19 : "=r"(flags)
20 : "i"(MSR_IE)
21 : "memory");
22 return flags;
23 }
24
25 static inline notrace void arch_local_irq_disable(void)
26 {
27 /* this uses r0 without declaring it - is that correct? */
28 asm volatile(" msrclr r0, %0 \n"
29 " nop \n"
30 :
31 : "i"(MSR_IE)
32 : "memory");
33 }
34
35 static inline notrace void arch_local_irq_enable(void)
36 {
37 /* this uses r0 without declaring it - is that correct? */
38 asm volatile(" msrset r0, %0 \n"
39 " nop \n"
40 :
41 : "i"(MSR_IE)
42 : "memory");
43 }
44
45 #else /* !CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */
46
47 static inline notrace unsigned long arch_local_irq_save(void)
48 {
49 unsigned long flags, tmp;
50 asm volatile (" mfs %0, rmsr \n"
51 " nop \n"
52 " andi %1, %0, %2 \n"
53 " mts rmsr, %1 \n"
54 " nop \n"
55 : "=r"(flags), "=r"(tmp)
56 : "i"(~MSR_IE)
57 : "memory");
58 return flags;
59 }
60
61 static inline notrace void arch_local_irq_disable(void)
62 {
63 unsigned long tmp;
64 asm volatile(" mfs %0, rmsr \n"
65 " nop \n"
66 " andi %0, %0, %1 \n"
67 " mts rmsr, %0 \n"
68 " nop \n"
69 : "=r"(tmp)
70 : "i"(~MSR_IE)
71 : "memory");
72 }
73
74 static inline notrace void arch_local_irq_enable(void)
75 {
76 unsigned long tmp;
77 asm volatile(" mfs %0, rmsr \n"
78 " nop \n"
79 " ori %0, %0, %1 \n"
80 " mts rmsr, %0 \n"
81 " nop \n"
82 : "=r"(tmp)
83 : "i"(MSR_IE)
84 : "memory");
85 }
86
87 #endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */
88
89 static inline notrace unsigned long arch_local_save_flags(void)
90 {
91 unsigned long flags;
92 asm volatile(" mfs %0, rmsr \n"
93 " nop \n"
94 : "=r"(flags)
95 :
96 : "memory");
97 return flags;
98 }
99
100 static inline notrace void arch_local_irq_restore(unsigned long flags)
101 {
102 asm volatile(" mts rmsr, %0 \n"
103 " nop \n"
104 :
105 : "r"(flags)
106 : "memory");
107 }
108
109 static inline notrace bool arch_irqs_disabled_flags(unsigned long flags)
110 {
111 return (flags & MSR_IE) == 0;
112 }
113
114 static inline notrace bool arch_irqs_disabled(void)
115 {
116 return arch_irqs_disabled_flags(arch_local_save_flags());
117 }
118
119 #endif /* _ASM_MICROBLAZE_IRQFLAGS_H */
120
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