This commit was generated by cvs2svn to compensate for changes in r1815,

[bootcd.git] / syslinux / com32 / include / sys / cpu.h

diff --git a/syslinux/com32/include/sys/cpu.h b/syslinux/com32/include/sys/cpu.h
new file mode 100644 (file)
index 0000000..1af2db7
--- /dev/null
+++ b/syslinux/com32/include/sys/cpu.h
@@ -0,0 +1,78 @@
+#ifndef _CPU_H
+#define _CPU_H
+
+#include <inttypes.h>
+
+static inline uint64_t rdtsc(void)
+{
+  uint64_t v;
+  asm volatile("rdtsc" : "=A" (v));
+  return v;
+}
+
+static inline uint32_t rdtscl(void)
+{
+  uint32_t v;
+  asm volatile("rdtsc" : "=a" (v) : : "edx");
+  return v;
+}
+
+static inline uint32_t cpuid_eax(uint32_t level)
+{
+  uint32_t v;
+
+  asm("cpuid" : "=a" (v) : "a" (level) : "ebx", "ecx", "edx");
+  return v;
+}
+static inline uint32_t cpuid_ebx(uint32_t level)
+{
+  uint32_t v;
+
+  asm("cpuid" : "=b" (v),  "+a" (level) : : "ecx", "edx");
+  return v;
+}
+static inline uint32_t cpuid_ecx(uint32_t level)
+{
+  uint32_t v;
+
+  asm("cpuid" : "=c" (v), "+a" (level) : : "ebx", "edx");
+  return v;
+}
+static inline uint32_t cpuid_edx(uint32_t level)
+{
+  uint32_t v;
+
+  asm("cpuid" : "=d" (v), "+a" (level) : : "ebx", "ecx");
+  return v;
+}
+
+static inline uint64_t rdmsr(uint32_t msr)
+{
+  uint64_t v;
+  
+  asm volatile("rdmsr" : "=A" (v) : "c" (msr));
+  return v;
+}
+static inline void wrmsr(uint64_t v, uint32_t msr)
+{
+  asm volatile("wrmsr" : : "A" (v), "c" (msr));
+}
+
+static inline void cpu_relax(void)
+{
+  asm volatile("rep ; nop");
+}
+
+/* These are local cli/sti; not SMP-safe!!! */
+
+static inline void cli(void)
+{
+  asm volatile("cli");
+}
+
+static inline void sti(void)
+{
+  asm volatile("sti");
+}
+
+#endif