/* * 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, -32(r1); \ std r0, 16(r1); \ stdu r1, -32(r1); \ bl func; \ ld r1, 0(r1); \ ld r1, 0(r1); #else #define TRACE_WITH_FRAME_BUFFER(func) \ bl func; #endif /* * Most of the CPU's IRQ-state tracing is done from assembly code; we * have to call a C function so call a wrapper that saves all the * C-clobbered registers. */ #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. */ #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