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, -32(r1); \ 24 std r0, 16(r1); \ 25 stdu r1, -32(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 * Most of the CPU's IRQ-state tracing is done from assembly code; we 36 * have to call a C function so call a wrapper that saves all the 37 * C-clobbered registers. 38 */ 39 #define TRACE_ENABLE_INTS TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_on) 40 #define TRACE_DISABLE_INTS TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_off) 41 42 /* 43 * This is used by assembly code to soft-disable interrupts first and 44 * reconcile irq state. 45 */ 46 #define RECONCILE_IRQ_STATE(__rA, __rB) \ 47 lbz __rA,PACASOFTIRQEN(r13); \ 48 lbz __rB,PACAIRQHAPPENED(r13); \ 49 cmpwi cr0,__rA,0; \ 50 li __rA,0; \ 51 ori __rB,__rB,PACA_IRQ_HARD_DIS; \ 52 stb __rB,PACAIRQHAPPENED(r13); \ 53 beq 44f; \ 54 stb __rA,PACASOFTIRQEN(r13); \ 55 TRACE_DISABLE_INTS; \ 56 44: 57 58 #else 59 #define TRACE_ENABLE_INTS 60 #define TRACE_DISABLE_INTS 61 62 #define RECONCILE_IRQ_STATE(__rA, __rB) \ 63 lbz __rA,PACAIRQHAPPENED(r13); \ 64 li __rB,0; \ 65 ori __rA,__rA,PACA_IRQ_HARD_DIS; \ 66 stb __rB,PACASOFTIRQEN(r13); \ 67 stb __rA,PACAIRQHAPPENED(r13) 68 #endif 69 #endif 70 71 #endif 72