1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2006 Atmark Techno, Inc.
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #ifndef _ASM_MICROBLAZE_IRQFLAGS_H
7*4882a593Smuzhiyun #define _ASM_MICROBLAZE_IRQFLAGS_H
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/types.h>
10*4882a593Smuzhiyun #include <asm/registers.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
13*4882a593Smuzhiyun
arch_local_irq_save(void)14*4882a593Smuzhiyun static inline notrace unsigned long arch_local_irq_save(void)
15*4882a593Smuzhiyun {
16*4882a593Smuzhiyun unsigned long flags;
17*4882a593Smuzhiyun asm volatile(" msrclr %0, %1 \n"
18*4882a593Smuzhiyun " nop \n"
19*4882a593Smuzhiyun : "=r"(flags)
20*4882a593Smuzhiyun : "i"(MSR_IE)
21*4882a593Smuzhiyun : "memory");
22*4882a593Smuzhiyun return flags;
23*4882a593Smuzhiyun }
24*4882a593Smuzhiyun
arch_local_irq_disable(void)25*4882a593Smuzhiyun static inline notrace void arch_local_irq_disable(void)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun /* this uses r0 without declaring it - is that correct? */
28*4882a593Smuzhiyun asm volatile(" msrclr r0, %0 \n"
29*4882a593Smuzhiyun " nop \n"
30*4882a593Smuzhiyun :
31*4882a593Smuzhiyun : "i"(MSR_IE)
32*4882a593Smuzhiyun : "memory");
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun
arch_local_irq_enable(void)35*4882a593Smuzhiyun static inline notrace void arch_local_irq_enable(void)
36*4882a593Smuzhiyun {
37*4882a593Smuzhiyun /* this uses r0 without declaring it - is that correct? */
38*4882a593Smuzhiyun asm volatile(" msrset r0, %0 \n"
39*4882a593Smuzhiyun " nop \n"
40*4882a593Smuzhiyun :
41*4882a593Smuzhiyun : "i"(MSR_IE)
42*4882a593Smuzhiyun : "memory");
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun #else /* !CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */
46*4882a593Smuzhiyun
arch_local_irq_save(void)47*4882a593Smuzhiyun static inline notrace unsigned long arch_local_irq_save(void)
48*4882a593Smuzhiyun {
49*4882a593Smuzhiyun unsigned long flags, tmp;
50*4882a593Smuzhiyun asm volatile (" mfs %0, rmsr \n"
51*4882a593Smuzhiyun " nop \n"
52*4882a593Smuzhiyun " andi %1, %0, %2 \n"
53*4882a593Smuzhiyun " mts rmsr, %1 \n"
54*4882a593Smuzhiyun " nop \n"
55*4882a593Smuzhiyun : "=r"(flags), "=r"(tmp)
56*4882a593Smuzhiyun : "i"(~MSR_IE)
57*4882a593Smuzhiyun : "memory");
58*4882a593Smuzhiyun return flags;
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
arch_local_irq_disable(void)61*4882a593Smuzhiyun static inline notrace void arch_local_irq_disable(void)
62*4882a593Smuzhiyun {
63*4882a593Smuzhiyun unsigned long tmp;
64*4882a593Smuzhiyun asm volatile(" mfs %0, rmsr \n"
65*4882a593Smuzhiyun " nop \n"
66*4882a593Smuzhiyun " andi %0, %0, %1 \n"
67*4882a593Smuzhiyun " mts rmsr, %0 \n"
68*4882a593Smuzhiyun " nop \n"
69*4882a593Smuzhiyun : "=r"(tmp)
70*4882a593Smuzhiyun : "i"(~MSR_IE)
71*4882a593Smuzhiyun : "memory");
72*4882a593Smuzhiyun }
73*4882a593Smuzhiyun
arch_local_irq_enable(void)74*4882a593Smuzhiyun static inline notrace void arch_local_irq_enable(void)
75*4882a593Smuzhiyun {
76*4882a593Smuzhiyun unsigned long tmp;
77*4882a593Smuzhiyun asm volatile(" mfs %0, rmsr \n"
78*4882a593Smuzhiyun " nop \n"
79*4882a593Smuzhiyun " ori %0, %0, %1 \n"
80*4882a593Smuzhiyun " mts rmsr, %0 \n"
81*4882a593Smuzhiyun " nop \n"
82*4882a593Smuzhiyun : "=r"(tmp)
83*4882a593Smuzhiyun : "i"(MSR_IE)
84*4882a593Smuzhiyun : "memory");
85*4882a593Smuzhiyun }
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun #endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */
88*4882a593Smuzhiyun
arch_local_save_flags(void)89*4882a593Smuzhiyun static inline notrace unsigned long arch_local_save_flags(void)
90*4882a593Smuzhiyun {
91*4882a593Smuzhiyun unsigned long flags;
92*4882a593Smuzhiyun asm volatile(" mfs %0, rmsr \n"
93*4882a593Smuzhiyun " nop \n"
94*4882a593Smuzhiyun : "=r"(flags)
95*4882a593Smuzhiyun :
96*4882a593Smuzhiyun : "memory");
97*4882a593Smuzhiyun return flags;
98*4882a593Smuzhiyun }
99*4882a593Smuzhiyun
arch_local_irq_restore(unsigned long flags)100*4882a593Smuzhiyun static inline notrace void arch_local_irq_restore(unsigned long flags)
101*4882a593Smuzhiyun {
102*4882a593Smuzhiyun asm volatile(" mts rmsr, %0 \n"
103*4882a593Smuzhiyun " nop \n"
104*4882a593Smuzhiyun :
105*4882a593Smuzhiyun : "r"(flags)
106*4882a593Smuzhiyun : "memory");
107*4882a593Smuzhiyun }
108*4882a593Smuzhiyun
arch_irqs_disabled_flags(unsigned long flags)109*4882a593Smuzhiyun static inline notrace bool arch_irqs_disabled_flags(unsigned long flags)
110*4882a593Smuzhiyun {
111*4882a593Smuzhiyun return (flags & MSR_IE) == 0;
112*4882a593Smuzhiyun }
113*4882a593Smuzhiyun
arch_irqs_disabled(void)114*4882a593Smuzhiyun static inline notrace bool arch_irqs_disabled(void)
115*4882a593Smuzhiyun {
116*4882a593Smuzhiyun return arch_irqs_disabled_flags(arch_local_save_flags());
117*4882a593Smuzhiyun }
118*4882a593Smuzhiyun
119*4882a593Smuzhiyun #endif /* _ASM_MICROBLAZE_IRQFLAGS_H */
120