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; \ 58 44: 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