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gerrit-public.fairphone.software / kernel / msm-4.19 / c7a9dd3cb62bed68861befbf176475459bfdc2f1 / . / arch / powerpc / include / asm / irqflags.h
blob: f2149066fe5db98fa0080b25ed1d38e85e15d7dc [file] [log] [blame]
Ingo Molnarde30a2b2006-07-03 00:24:42 -0700[diff] [blame]1/*
Ingo Molnarde30a2b2006-07-03 00:24:42 -0700[diff] [blame]2 * IRQ flags handling
Ingo Molnarde30a2b2006-07-03 00:24:42 -0700[diff] [blame]3 */
4#ifndef _ASM_IRQFLAGS_H
5#define _ASM_IRQFLAGS_H
6
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +1000[diff] [blame]7#ifndef __ASSEMBLY__
Ingo Molnarde30a2b2006-07-03 00:24:42 -0700[diff] [blame]8/*
David Howellsdf9ee292010-10-07 14:08:55 +0100[diff] [blame]9 * Get definitions for arch_local_save_flags(x), etc.
Ingo Molnarde30a2b2006-07-03 00:24:42 -0700[diff] [blame]10 */
Stephen Rothwellb8b572e2008-08-01 15:20:30 +1000[diff] [blame]11#include <asm/hw_irq.h>
Ingo Molnarde30a2b2006-07-03 00:24:42 -0700[diff] [blame]12
Ingo Molnarde30a2b2006-07-03 00:24:42 -0700[diff] [blame]13#else
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +1000[diff] [blame]14#ifdef CONFIG_TRACE_IRQFLAGS
Steven Rostedt3cb5f1a2010-12-23 19:46:06 +0000[diff] [blame]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; \
Anton Blanchardd51959d2014-03-10 12:51:58 +1100[diff] [blame]23 stdu r1, -STACK_FRAME_OVERHEAD(r1); \
Steven Rostedt3cb5f1a2010-12-23 19:46:06 +0000[diff] [blame]24 std r0, 16(r1); \
Anton Blanchardd51959d2014-03-10 12:51:58 +1100[diff] [blame]25 stdu r1, -STACK_FRAME_OVERHEAD(r1); \
Steven Rostedt3cb5f1a2010-12-23 19:46:06 +0000[diff] [blame]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
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +1000[diff] [blame]34/*
Michael Ellerman144beb22014-07-15 21:15:36 +1000[diff] [blame]35 * These are calls to C code, so the caller must be prepared for volatiles to
36 * be clobbered.
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +1000[diff] [blame]37 */
Anton Blanchardb1576fe2014-02-04 16:04:35 +1100[diff] [blame]38#define TRACE_ENABLE_INTS TRACE_WITH_FRAME_BUFFER(trace_hardirqs_on)
39#define TRACE_DISABLE_INTS TRACE_WITH_FRAME_BUFFER(trace_hardirqs_off)
Steven Rostedt3cb5f1a2010-12-23 19:46:06 +0000[diff] [blame]40
Benjamin Herrenschmidt7230c562012-03-06 18:27:59 +1100[diff] [blame]41/*
Tiejun Chende021bb2013-07-16 11:09:30 +0800[diff] [blame]42 * This is used by assembly code to soft-disable interrupts first and
43 * reconcile irq state.
Michael Ellerman144beb22014-07-15 21:15:36 +1000[diff] [blame]44 *
45 * NB: This may call C code, so the caller must be prepared for volatiles to
46 * be clobbered.
Benjamin Herrenschmidt7230c562012-03-06 18:27:59 +1100[diff] [blame]47 */
Tiejun Chende021bb2013-07-16 11:09:30 +0800[diff] [blame]48#define RECONCILE_IRQ_STATE(__rA, __rB) \
Benjamin Herrenschmidt7230c562012-03-06 18:27:59 +1100[diff] [blame]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; \
5844:
59
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +1000[diff] [blame]60#else
61#define TRACE_ENABLE_INTS
62#define TRACE_DISABLE_INTS
Benjamin Herrenschmidt7230c562012-03-06 18:27:59 +1100[diff] [blame]63
Tiejun Chende021bb2013-07-16 11:09:30 +0800[diff] [blame]64#define RECONCILE_IRQ_STATE(__rA, __rB) \
Benjamin Herrenschmidt7230c562012-03-06 18:27:59 +1100[diff] [blame]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)
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +1000[diff] [blame]70#endif
Ingo Molnarde30a2b2006-07-03 00:24:42 -0700[diff] [blame]71#endif
72
73#endif