make a bootable BIOS

includes source from kvm-unit-tests

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/include/ioport.h b/include/ioport.h
new file mode 100644
index 0000000..bbec982
--- /dev/null
+++ b/include/ioport.h
@@ -0,0 +1,50 @@
+#ifndef _IOPORT_H
+#define _IOPORT_H 1
+
+static inline void outsb(unsigned short port, void *buf, int len)
+{
+	asm volatile("rep outsb %%ds:(%0), %3" : "+S" (buf), "+c" (len) : "m"(buf), "Nd"(port), "0" (buf), "1" (len));
+}
+
+static inline void insb(void *buf, unsigned short port, int len)
+{
+	asm volatile("rep insb %3, %%es:(%0)" : "+D" (buf), "+c" (len), "=m"(buf) : "Nd"(port), "0" (buf), "1" (len));
+}
+
+static inline unsigned char inb(unsigned short port)
+{
+	unsigned char val;
+	asm volatile("inb %1, %0" : "=a"(val) : "Nd"(port));
+	return val;
+}
+
+static inline unsigned short inw(unsigned short port)
+{
+	unsigned short val;
+	asm volatile("inw %1, %0" : "=a"(val) : "Nd"(port));
+	return val;
+}
+
+static inline unsigned inl(unsigned short port)
+{
+	unsigned val;
+	asm volatile("inl %1, %0" : "=a"(val) : "Nd"(port));
+	return val;
+}
+
+static inline void outb(unsigned short port, unsigned char val)
+{
+	asm volatile("outb %0, %1" : : "a"(val), "Nd"(port));
+}
+
+static inline void outw(unsigned short port, unsigned short val)
+{
+	asm volatile("outw %0, %1" : : "a"(val), "Nd"(port));
+}
+
+static inline void outl(unsigned short port, unsigned val)
+{
+	asm volatile("outl %0, %1" : : "a"(val), "Nd"(port));
+}
+
+#endif