Linux 4.13.16
[linux/fpc-iii.git] / arch / powerpc / include / asm / irqflags.h
blobf2149066fe5db98fa0080b25ed1d38e85e15d7dc
1 /*
2 * IRQ flags handling
3 */
4 #ifndef _ASM_IRQFLAGS_H
5 #define _ASM_IRQFLAGS_H
7 #ifndef __ASSEMBLY__
8 /*
9 * Get definitions for arch_local_save_flags(x), etc.
11 #include <asm/hw_irq.h>
13 #else
14 #ifdef CONFIG_TRACE_IRQFLAGS
15 #ifdef CONFIG_IRQSOFF_TRACER
17 * Since the ftrace irqsoff latency trace checks CALLER_ADDR1,
18 * which is the stack frame here, we need to force a stack frame
19 * in case we came from user space.
21 #define TRACE_WITH_FRAME_BUFFER(func) \
22 mflr r0; \
23 stdu r1, -STACK_FRAME_OVERHEAD(r1); \
24 std r0, 16(r1); \
25 stdu r1, -STACK_FRAME_OVERHEAD(r1); \
26 bl func; \
27 ld r1, 0(r1); \
28 ld r1, 0(r1);
29 #else
30 #define TRACE_WITH_FRAME_BUFFER(func) \
31 bl func;
32 #endif
35 * These are calls to C code, so the caller must be prepared for volatiles to
36 * be clobbered.
38 #define TRACE_ENABLE_INTS TRACE_WITH_FRAME_BUFFER(trace_hardirqs_on)
39 #define TRACE_DISABLE_INTS TRACE_WITH_FRAME_BUFFER(trace_hardirqs_off)
42 * This is used by assembly code to soft-disable interrupts first and
43 * reconcile irq state.
45 * NB: This may call C code, so the caller must be prepared for volatiles to
46 * be clobbered.
48 #define RECONCILE_IRQ_STATE(__rA, __rB) \
49 lbz __rA,PACASOFTIRQEN(r13); \
50 lbz __rB,PACAIRQHAPPENED(r13); \
51 cmpwi cr0,__rA,0; \
52 li __rA,0; \
53 ori __rB,__rB,PACA_IRQ_HARD_DIS; \
54 stb __rB,PACAIRQHAPPENED(r13); \
55 beq 44f; \
56 stb __rA,PACASOFTIRQEN(r13); \
57 TRACE_DISABLE_INTS; \
58 44:
60 #else
61 #define TRACE_ENABLE_INTS
62 #define TRACE_DISABLE_INTS
64 #define RECONCILE_IRQ_STATE(__rA, __rB) \
65 lbz __rA,PACAIRQHAPPENED(r13); \
66 li __rB,0; \
67 ori __rA,__rA,PACA_IRQ_HARD_DIS; \
68 stb __rB,PACASOFTIRQEN(r13); \
69 stb __rA,PACAIRQHAPPENED(r13)
70 #endif
71 #endif
73 #endif