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/* SPDX-License-Identifier: GPL-2.0 */ /* * 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,PACAIRQSOFTMASK(r13); \ lbz __rB,PACAIRQHAPPENED(r13); \ andi. __rA,__rA,IRQS_DISABLED; \ li __rA,IRQS_DISABLED; \ ori __rB,__rB,PACA_IRQ_HARD_DIS; \ stb __rB,PACAIRQHAPPENED(r13); \ bne 44f; \ stb __rA,PACAIRQSOFTMASK(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,IRQS_DISABLED; \ ori __rA,__rA,PACA_IRQ_HARD_DIS; \ stb __rB,PACAIRQSOFTMASK(r13); \ stb __rA,PACAIRQHAPPENED(r13) #endif #endif #endif