74 lines
1.7 KiB
C
74 lines
1.7 KiB
C
/*
|
|
* IRQ flags handling
|
|
*/
|
|
#ifndef _ASM_IRQFLAGS_H
|
|
#define _ASM_IRQFLAGS_H
|
|
|
|
#ifndef __ASSEMBLY__
|
|
/*
|
|
* Get definitions for arch_local_save_flags(x), etc.
|
|
*/
|
|
#include <asm/hw_irq.h>
|
|
|
|
#else
|
|
#ifdef CONFIG_TRACE_IRQFLAGS
|
|
#ifdef CONFIG_IRQSOFF_TRACER
|
|
/*
|
|
* Since the ftrace irqsoff latency trace checks CALLER_ADDR1,
|
|
* which is the stack frame here, we need to force a stack frame
|
|
* in case we came from user space.
|
|
*/
|
|
#define TRACE_WITH_FRAME_BUFFER(func) \
|
|
mflr r0; \
|
|
stdu r1, -STACK_FRAME_OVERHEAD(r1); \
|
|
std r0, 16(r1); \
|
|
stdu r1, -STACK_FRAME_OVERHEAD(r1); \
|
|
bl func; \
|
|
ld r1, 0(r1); \
|
|
ld r1, 0(r1);
|
|
#else
|
|
#define TRACE_WITH_FRAME_BUFFER(func) \
|
|
bl func;
|
|
#endif
|
|
|
|
/*
|
|
* These are calls to C code, so the caller must be prepared for volatiles to
|
|
* be clobbered.
|
|
*/
|
|
#define TRACE_ENABLE_INTS TRACE_WITH_FRAME_BUFFER(trace_hardirqs_on)
|
|
#define TRACE_DISABLE_INTS TRACE_WITH_FRAME_BUFFER(trace_hardirqs_off)
|
|
|
|
/*
|
|
* This is used by assembly code to soft-disable interrupts first and
|
|
* reconcile irq state.
|
|
*
|
|
* NB: This may call C code, so the caller must be prepared for volatiles to
|
|
* be clobbered.
|
|
*/
|
|
#define RECONCILE_IRQ_STATE(__rA, __rB) \
|
|
lbz __rA,PACASOFTIRQEN(r13); \
|
|
lbz __rB,PACAIRQHAPPENED(r13); \
|
|
cmpwi cr0,__rA,0; \
|
|
li __rA,0; \
|
|
ori __rB,__rB,PACA_IRQ_HARD_DIS; \
|
|
stb __rB,PACAIRQHAPPENED(r13); \
|
|
beq 44f; \
|
|
stb __rA,PACASOFTIRQEN(r13); \
|
|
TRACE_DISABLE_INTS; \
|
|
44:
|
|
|
|
#else
|
|
#define TRACE_ENABLE_INTS
|
|
#define TRACE_DISABLE_INTS
|
|
|
|
#define RECONCILE_IRQ_STATE(__rA, __rB) \
|
|
lbz __rA,PACAIRQHAPPENED(r13); \
|
|
li __rB,0; \
|
|
ori __rA,__rA,PACA_IRQ_HARD_DIS; \
|
|
stb __rB,PACASOFTIRQEN(r13); \
|
|
stb __rA,PACAIRQHAPPENED(r13)
|
|
#endif
|
|
#endif
|
|
|
|
#endif
|