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, -STACK_FRAME_OVERHEAD(r1); \ 24 std r0, 16(r1); \ 25 stdu r1, -STACK_FRAME_OVERHEAD(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 * These are calls to C code, so the caller must be prepared for volatiles to 36 * be clobbered. 37 */ 38#define TRACE_ENABLE_INTS TRACE_WITH_FRAME_BUFFER(trace_hardirqs_on) 39#define TRACE_DISABLE_INTS TRACE_WITH_FRAME_BUFFER(trace_hardirqs_off) 40 41/* 42 * This is used by assembly code to soft-disable interrupts first and 43 * reconcile irq state. 44 * 45 * NB: This may call C code, so the caller must be prepared for volatiles to 46 * be clobbered. 47 */ 48#define RECONCILE_IRQ_STATE(__rA, __rB) \ 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 60#else 61#define TRACE_ENABLE_INTS 62#define TRACE_DISABLE_INTS 63 64#define RECONCILE_IRQ_STATE(__rA, __rB) \ 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) 70#endif 71#endif 72 73#endif 74