1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * IRQ flags handling 4 */ 5 #ifndef _ASM_IRQFLAGS_H 6 #define _ASM_IRQFLAGS_H 7 8 #ifndef __ASSEMBLY__ 9 /* 10 * Get definitions for arch_local_save_flags(x), etc. 11 */ 12 #include <asm/hw_irq.h> 13 14 #else 15 #ifdef CONFIG_TRACE_IRQFLAGS 16 #ifdef CONFIG_IRQSOFF_TRACER 17 /* 18 * Since the ftrace irqsoff latency trace checks CALLER_ADDR1, 19 * which is the stack frame here, we need to force a stack frame 20 * in case we came from user space. 21 */ 22 #define TRACE_WITH_FRAME_BUFFER(func) \ 23 mflr r0; \ 24 stdu r1, -STACK_FRAME_OVERHEAD(r1); \ 25 std r0, 16(r1); \ 26 stdu r1, -STACK_FRAME_OVERHEAD(r1); \ 27 bl func; \ 28 ld r1, 0(r1); \ 29 ld r1, 0(r1); 30 #else 31 #define TRACE_WITH_FRAME_BUFFER(func) \ 32 bl func; 33 #endif 34 35 /* 36 * These are calls to C code, so the caller must be prepared for volatiles to 37 * be clobbered. 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 * NB: This may call C code, so the caller must be prepared for volatiles to 47 * be clobbered. 48 */ 49 #define RECONCILE_IRQ_STATE(__rA, __rB) \ 50 lbz __rA,PACAIRQSOFTMASK(r13); \ 51 lbz __rB,PACAIRQHAPPENED(r13); \ 52 andi. __rA,__rA,IRQS_DISABLED; \ 53 li __rA,IRQS_DISABLED; \ 54 ori __rB,__rB,PACA_IRQ_HARD_DIS; \ 55 stb __rB,PACAIRQHAPPENED(r13); \ 56 bne 44f; \ 57 stb __rA,PACAIRQSOFTMASK(r13); \ 58 TRACE_DISABLE_INTS; \ 59 44: 60 61 #else 62 #define TRACE_ENABLE_INTS 63 #define TRACE_DISABLE_INTS 64 65 #define RECONCILE_IRQ_STATE(__rA, __rB) \ 66 lbz __rA,PACAIRQHAPPENED(r13); \ 67 li __rB,IRQS_DISABLED; \ 68 ori __rA,__rA,PACA_IRQ_HARD_DIS; \ 69 stb __rB,PACAIRQSOFTMASK(r13); \ 70 stb __rA,PACAIRQHAPPENED(r13) 71 #endif 72 #endif 73 74 #endif 75