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authorLinus Torvalds <torvalds@g5.osdl.org>2006-06-24 14:27:42 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-24 14:44:01 -0700
commiteb71c87a492b7090ff9e8ac46912c480a1687e38 (patch)
tree1136213dee0f942866b6c2c65de7e7c63ca94fda /include/linux/resume-trace.h
parentd384ea691fe4ea8c2dd5b9b8d9042eb181776f18 (diff)
downloadop-kernel-dev-eb71c87a492b7090ff9e8ac46912c480a1687e38.zip
op-kernel-dev-eb71c87a492b7090ff9e8ac46912c480a1687e38.tar.gz
Add some basic resume trace facilities
Considering that there isn't a lot of hw we can depend on during resume, this is about as good as it gets. This is x86-only for now, although the basic concept (and most of the code) will certainly work on almost any platform. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/resume-trace.h')
-rw-r--r--include/linux/resume-trace.h30
1 files changed, 30 insertions, 0 deletions
diff --git a/include/linux/resume-trace.h b/include/linux/resume-trace.h
new file mode 100644
index 0000000..a376bd4
--- /dev/null
+++ b/include/linux/resume-trace.h
@@ -0,0 +1,30 @@
+#ifndef RESUME_TRACE_H
+#define RESUME_TRACE_H
+
+#ifdef CONFIG_PM_TRACE
+
+struct device;
+extern void set_trace_device(struct device *);
+extern void generate_resume_trace(void *tracedata, unsigned int user);
+
+#define TRACE_DEVICE(dev) set_trace_device(dev)
+#define TRACE_RESUME(user) do { \
+ void *tracedata; \
+ asm volatile("movl $1f,%0\n" \
+ ".section .tracedata,\"a\"\n" \
+ "1:\t.word %c1\n" \
+ "\t.long %c2\n" \
+ ".previous" \
+ :"=r" (tracedata) \
+ : "i" (__LINE__), "i" (__FILE__)); \
+ generate_resume_trace(tracedata, user); \
+} while (0)
+
+#else
+
+#define TRACE_DEVICE(dev) do { } while (0)
+#define TRACE_RESUME(dev) do { } while (0)
+
+#endif
+
+#endif
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