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authorH. Peter Anvin <hpa@zytor.com>2007-09-21 16:52:35 -0700
committerH. Peter Anvin <hpa@zytor.com>2007-09-21 16:52:35 -0700
commit5a16eeb519c87fa4c437e838af81731b8d355052 (patch)
treef59258a720429d5ad8beaf2070f73cab6a187077 /memdump/io.h
parent31daeb2ddb972dc70b929da1c93288e821c87ed7 (diff)
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memdump: a debugging utility to dump memory over a serial port
A memory-dumping utility which runs in real mode. Thus, it can be used to get memory dumps from a relatively pristine system.
Diffstat (limited to 'memdump/io.h')
-rw-r--r--memdump/io.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/memdump/io.h b/memdump/io.h
new file mode 100644
index 00000000..a592402f
--- /dev/null
+++ b/memdump/io.h
@@ -0,0 +1,40 @@
+#ifndef IO_H
+#define IO_H
+
+static inline void outb(unsigned char v, unsigned short p)
+{
+ asm volatile("outb %1,%0" : : "d" (p), "a" (v));
+}
+
+static inline unsigned char inb(unsigned short p)
+{
+ unsigned char v;
+ asm volatile("inb %1,%0" : "=a" (v) : "d" (p));
+ return v;
+}
+
+static inline void outw(unsigned short v, unsigned short p)
+{
+ asm volatile("outw %1,%0" : : "d" (p), "a" (v));
+}
+
+static inline unsigned short inw(unsigned short p)
+{
+ unsigned short v;
+ asm volatile("inw %1,%0" : "=a" (v) : "d" (p));
+ return v;
+}
+
+static inline void outl(unsigned int v, unsigned short p)
+{
+ asm volatile("outl %1,%0" : : "d" (p), "a" (v));
+}
+
+static inline unsigned int inl(unsigned short p)
+{
+ unsigned int v;
+ asm volatile("inl %1,%0" : "=a" (v) : "d" (p));
+ return v;
+}
+
+#endif