Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[linux-2.6.git] / arch / powerpc / include / asm / irqflags.h
1 /*
2  * IRQ flags handling
3  */
4 #ifndef _ASM_IRQFLAGS_H
5 #define _ASM_IRQFLAGS_H
6
7 #ifndef __ASSEMBLY__
8 /*
9  * Get definitions for arch_local_save_flags(x), etc.
10  */
11 #include <asm/hw_irq.h>
12
13 #else
14 #ifdef CONFIG_TRACE_IRQFLAGS
15 #ifdef CONFIG_IRQSOFF_TRACER
16 /*
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.
20  */
21 #define TRACE_WITH_FRAME_BUFFER(func)           \
22         mflr    r0;                             \
23         stdu    r1, -32(r1);                    \
24         std     r0, 16(r1);                     \
25         stdu    r1, -32(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
33
34 /*
35  * Most of the CPU's IRQ-state tracing is done from assembly code; we
36  * have to call a C function so call a wrapper that saves all the
37  * C-clobbered registers.
38  */
39 #define TRACE_ENABLE_INTS       TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_on)
40 #define TRACE_DISABLE_INTS      TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_off)
41
42 #define TRACE_AND_RESTORE_IRQ_PARTIAL(en,skip)          \
43         cmpdi   en,0;                                   \
44         bne     95f;                                    \
45         stb     en,PACASOFTIRQEN(r13);                  \
46         TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_off)    \
47         b       skip;                                   \
48 95:     TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_on)     \
49         li      en,1;
50 #define TRACE_AND_RESTORE_IRQ(en)               \
51         TRACE_AND_RESTORE_IRQ_PARTIAL(en,96f);  \
52         stb     en,PACASOFTIRQEN(r13);          \
53 96:
54 #else
55 #define TRACE_ENABLE_INTS
56 #define TRACE_DISABLE_INTS
57 #define TRACE_AND_RESTORE_IRQ_PARTIAL(en,skip)
58 #define TRACE_AND_RESTORE_IRQ(en)               \
59         stb     en,PACASOFTIRQEN(r13)
60 #endif
61 #endif
62
63 #endif