| Ingo Molnar | de30a2b | 2006-07-03 00:24:42 -0700 | [diff] [blame] | 1 | /* |
| Ingo Molnar | de30a2b | 2006-07-03 00:24:42 -0700 | [diff] [blame] | 2 | * IRQ flags handling |
| Ingo Molnar | de30a2b | 2006-07-03 00:24:42 -0700 | [diff] [blame] | 3 | */ |
| 4 | #ifndef _ASM_IRQFLAGS_H |
| 5 | #define _ASM_IRQFLAGS_H |
| 6 | |
| Benjamin Herrenschmidt | 945feb1 | 2008-04-17 14:35:01 +1000 | [diff] [blame] | 7 | #ifndef __ASSEMBLY__ |
| Ingo Molnar | de30a2b | 2006-07-03 00:24:42 -0700 | [diff] [blame] | 8 | /* |
| David Howells | df9ee29 | 2010-10-07 14:08:55 +0100 | [diff] [blame] | 9 | * Get definitions for arch_local_save_flags(x), etc. |
| Ingo Molnar | de30a2b | 2006-07-03 00:24:42 -0700 | [diff] [blame] | 10 | */ |
| Stephen Rothwell | b8b572e | 2008-08-01 15:20:30 +1000 | [diff] [blame] | 11 | #include <asm/hw_irq.h> |
| Ingo Molnar | de30a2b | 2006-07-03 00:24:42 -0700 | [diff] [blame] | 12 | |
| Ingo Molnar | de30a2b | 2006-07-03 00:24:42 -0700 | [diff] [blame] | 13 | #else |
| Benjamin Herrenschmidt | 945feb1 | 2008-04-17 14:35:01 +1000 | [diff] [blame] | 14 | #ifdef CONFIG_TRACE_IRQFLAGS |
| Steven Rostedt | 3cb5f1a | 2010-12-23 19:46:06 +0000 | [diff] [blame] | 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 | |
| Benjamin Herrenschmidt | 945feb1 | 2008-04-17 14:35:01 +1000 | [diff] [blame] | 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 | */ |
| Steven Rostedt | 3cb5f1a | 2010-12-23 19:46:06 +0000 | [diff] [blame] | 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 | |
| Benjamin Herrenschmidt | 7230c56 | 2012-03-06 18:27:59 +1100 | [diff] [blame] | 42 | /* |
| 43 | * This is used by assembly code to soft-disable interrupts |
| 44 | */ |
| 45 | #define SOFT_DISABLE_INTS(__rA, __rB) \ |
| 46 | lbz __rA,PACASOFTIRQEN(r13); \ |
| 47 | lbz __rB,PACAIRQHAPPENED(r13); \ |
| 48 | cmpwi cr0,__rA,0; \ |
| 49 | li __rA,0; \ |
| 50 | ori __rB,__rB,PACA_IRQ_HARD_DIS; \ |
| 51 | stb __rB,PACAIRQHAPPENED(r13); \ |
| 52 | beq 44f; \ |
| 53 | stb __rA,PACASOFTIRQEN(r13); \ |
| 54 | TRACE_DISABLE_INTS; \ |
| 55 | 44: |
| 56 | |
| Benjamin Herrenschmidt | 945feb1 | 2008-04-17 14:35:01 +1000 | [diff] [blame] | 57 | #else |
| 58 | #define TRACE_ENABLE_INTS |
| 59 | #define TRACE_DISABLE_INTS |
| Benjamin Herrenschmidt | 7230c56 | 2012-03-06 18:27:59 +1100 | [diff] [blame] | 60 | |
| 61 | #define SOFT_DISABLE_INTS(__rA, __rB) \ |
| 62 | lbz __rA,PACAIRQHAPPENED(r13); \ |
| 63 | li __rB,0; \ |
| 64 | ori __rA,__rA,PACA_IRQ_HARD_DIS; \ |
| 65 | stb __rB,PACASOFTIRQEN(r13); \ |
| 66 | stb __rA,PACAIRQHAPPENED(r13) |
| Benjamin Herrenschmidt | 945feb1 | 2008-04-17 14:35:01 +1000 | [diff] [blame] | 67 | #endif |
| Ingo Molnar | de30a2b | 2006-07-03 00:24:42 -0700 | [diff] [blame] | 68 | #endif |
| 69 | |
| 70 | #endif |