Commit | Line | Data |
---|---|---|
f5e706ad | 1 | /* |
a439fe51 | 2 | * include/asm/irqflags.h |
f5e706ad SR |
3 | * |
4 | * IRQ flags handling | |
5 | * | |
6 | * This file gets included from lowlevel asm headers too, to provide | |
7 | * wrapped versions of the local_irq_*() APIs, based on the | |
df9ee292 | 8 | * arch_local_irq_*() functions from the lowlevel headers. |
f5e706ad SR |
9 | */ |
10 | #ifndef _ASM_IRQFLAGS_H | |
11 | #define _ASM_IRQFLAGS_H | |
12 | ||
b4f4372f DM |
13 | #include <asm/pil.h> |
14 | ||
f5e706ad SR |
15 | #ifndef __ASSEMBLY__ |
16 | ||
df9ee292 | 17 | static inline unsigned long arch_local_save_flags(void) |
f5e706ad SR |
18 | { |
19 | unsigned long flags; | |
20 | ||
21 | __asm__ __volatile__( | |
22 | "rdpr %%pil, %0" | |
23 | : "=r" (flags) | |
24 | ); | |
25 | ||
26 | return flags; | |
27 | } | |
28 | ||
df9ee292 | 29 | static inline void arch_local_irq_restore(unsigned long flags) |
f5e706ad SR |
30 | { |
31 | __asm__ __volatile__( | |
32 | "wrpr %0, %%pil" | |
33 | : /* no output */ | |
34 | : "r" (flags) | |
35 | : "memory" | |
36 | ); | |
37 | } | |
38 | ||
df9ee292 | 39 | static inline void arch_local_irq_disable(void) |
f5e706ad SR |
40 | { |
41 | __asm__ __volatile__( | |
b4f4372f | 42 | "wrpr %0, %%pil" |
f5e706ad | 43 | : /* no outputs */ |
b4f4372f | 44 | : "i" (PIL_NORMAL_MAX) |
f5e706ad SR |
45 | : "memory" |
46 | ); | |
47 | } | |
48 | ||
df9ee292 | 49 | static inline void arch_local_irq_enable(void) |
f5e706ad SR |
50 | { |
51 | __asm__ __volatile__( | |
52 | "wrpr 0, %%pil" | |
53 | : /* no outputs */ | |
54 | : /* no inputs */ | |
55 | : "memory" | |
56 | ); | |
57 | } | |
58 | ||
df9ee292 | 59 | static inline int arch_irqs_disabled_flags(unsigned long flags) |
f5e706ad SR |
60 | { |
61 | return (flags > 0); | |
62 | } | |
63 | ||
df9ee292 | 64 | static inline int arch_irqs_disabled(void) |
f5e706ad | 65 | { |
df9ee292 | 66 | return arch_irqs_disabled_flags(arch_local_save_flags()); |
f5e706ad SR |
67 | } |
68 | ||
df9ee292 | 69 | static inline unsigned long arch_local_irq_save(void) |
f5e706ad | 70 | { |
0c25e9e6 | 71 | unsigned long flags, tmp; |
f5e706ad | 72 | |
0c25e9e6 DM |
73 | /* Disable interrupts to PIL_NORMAL_MAX unless we already |
74 | * are using PIL_NMI, in which case PIL_NMI is retained. | |
c011f80b DM |
75 | * |
76 | * The only values we ever program into the %pil are 0, | |
77 | * PIL_NORMAL_MAX and PIL_NMI. | |
78 | * | |
79 | * Since PIL_NMI is the largest %pil value and all bits are | |
80 | * set in it (0xf), it doesn't matter what PIL_NORMAL_MAX | |
81 | * actually is. | |
0c25e9e6 DM |
82 | */ |
83 | __asm__ __volatile__( | |
84 | "rdpr %%pil, %0\n\t" | |
85 | "or %0, %2, %1\n\t" | |
86 | "wrpr %1, 0x0, %%pil" | |
87 | : "=r" (flags), "=r" (tmp) | |
88 | : "i" (PIL_NORMAL_MAX) | |
89 | : "memory" | |
90 | ); | |
f5e706ad SR |
91 | |
92 | return flags; | |
93 | } | |
94 | ||
f5e706ad SR |
95 | #endif /* (__ASSEMBLY__) */ |
96 | ||
97 | #endif /* !(_ASM_IRQFLAGS_H) */ |