1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * IRQ flags handling
 4 */
 5#ifndef _ASM_IRQFLAGS_H
 6#define _ASM_IRQFLAGS_H
 7
 8#ifndef __ASSEMBLY__
 9/*
10 * Get definitions for arch_local_save_flags(x), etc.
11 */
12#include <asm/hw_irq.h>
13
14#else
15#ifdef CONFIG_TRACE_IRQFLAGS
16#ifdef CONFIG_IRQSOFF_TRACER
17/*
18 * Since the ftrace irqsoff latency trace checks CALLER_ADDR1,
19 * which is the stack frame here, we need to force a stack frame
20 * in case we came from user space.
21 */
22#define TRACE_WITH_FRAME_BUFFER(func)		\
23	mflr	r0;				\
24	stdu	r1, -STACK_FRAME_OVERHEAD(r1);	\
25	std	r0, 16(r1);			\
26	stdu	r1, -STACK_FRAME_OVERHEAD(r1);	\
27	bl func;				\
28	ld	r1, 0(r1);			\
29	ld	r1, 0(r1);
30#else
31#define TRACE_WITH_FRAME_BUFFER(func)		\
32	bl func;
33#endif
34
35/*
36 * These are calls to C code, so the caller must be prepared for volatiles to
37 * be clobbered.
 
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/*
43 * This is used by assembly code to soft-disable interrupts first and
44 * reconcile irq state.
45 *
46 * NB: This may call C code, so the caller must be prepared for volatiles to
47 * be clobbered.
48 */
49#define RECONCILE_IRQ_STATE(__rA, __rB)		\
50	lbz	__rA,PACAIRQSOFTMASK(r13);	\
51	lbz	__rB,PACAIRQHAPPENED(r13);	\
52	andi.	__rA,__rA,IRQS_DISABLED;	\
53	li	__rA,IRQS_DISABLED;		\
54	ori	__rB,__rB,PACA_IRQ_HARD_DIS;	\
55	stb	__rB,PACAIRQHAPPENED(r13);	\
56	bne	44f;				\
57	stb	__rA,PACAIRQSOFTMASK(r13);	\
58	TRACE_DISABLE_INTS;			\
5944:
60
 
 
 
 
 
 
 
 
 
 
 
 
61#else
62#define TRACE_ENABLE_INTS
63#define TRACE_DISABLE_INTS
64
65#define RECONCILE_IRQ_STATE(__rA, __rB)		\
66	lbz	__rA,PACAIRQHAPPENED(r13);	\
67	li	__rB,IRQS_DISABLED;		\
68	ori	__rA,__rA,PACA_IRQ_HARD_DIS;	\
69	stb	__rB,PACAIRQSOFTMASK(r13);	\
70	stb	__rA,PACAIRQHAPPENED(r13)
71#endif
72#endif
73
74#endif

 
 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;					\
4895:	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);		\
5396:
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