1 files changed, 142 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/include/sys/cpu.h b/contrib/syslinux-4.02/com32/include/sys/cpu.h
new file mode 100644
index 0000000..53a6250
--- /dev/null
+++ b/contrib/syslinux-4.02/com32/include/sys/cpu.h
@@ -0,0 +1,142 @@
+#ifndef _CPU_H
+#define _CPU_H
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <klibc/compiler.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 void cpuid_count(uint32_t op, uint32_t cnt,
+			       uint32_t * eax, uint32_t * ebx,
+			       uint32_t * ecx, uint32_t * edx)
+{
+    asm volatile("movl %%ebx,%1 ; "
+		 "cpuid ; "
+		 "xchgl %1,%%ebx"
+		 : "=a" (*eax), "=SD" (*ebx), "=c" (*ecx), "=d" (*edx)
+		 : "a"(op), "c"(cnt));
+}
+
+static inline void cpuid(uint32_t op, uint32_t * eax, uint32_t * ebx,
+			 uint32_t * ecx, uint32_t * edx)
+{
+    cpuid_count(op, 0, eax, ebx, ecx, edx);
+}
+
+static inline __constfunc uint32_t cpuid_eax(uint32_t level)
+{
+    uint32_t v;
+
+    asm volatile("pushl %%ebx ; "
+		 "cpuid ; "
+		 "popl %%ebx"
+		 : "=a" (v)
+		 : "a"(level)
+		 : "ecx", "edx");
+    return v;
+}
+
+static inline __constfunc uint32_t cpuid_ebx(uint32_t level)
+{
+    uint32_t v;
+
+    asm volatile("movl %%ebx,%0 ; "
+		 "cpuid ; "
+		 "xchgl %0,%%ebx"
+		 : "=SD" (v), "+a" (level)
+		 : : "ecx", "edx");
+    return v;
+}
+
+static inline __constfunc uint32_t cpuid_ecx(uint32_t level)
+{
+    uint32_t v;
+
+    asm volatile("pushl %%ebx ; "
+		 "cpuid ; "
+		 "popl %%ebx"
+		 : "=c" (v), "+a" (level)
+		 : : "edx");
+    return v;
+}
+
+static inline __constfunc uint32_t cpuid_edx(uint32_t level)
+{
+    uint32_t v;
+
+    asm volatile("pushl %%ebx ; "
+		 "cpuid ; "
+		 "popl %%ebx"
+		 : "=d" (v), "+a" (level)
+		 : : "ecx");
+    return v;
+}
+
+/* Standard macro to see if a specific flag is changeable */
+static inline __constfunc bool cpu_has_eflag(uint32_t flag)
+{
+	uint32_t f0, f1;
+
+	asm("pushfl ; "
+	    "pushfl ; "
+	    "popl %0 ; "
+	    "movl %0,%1 ; "
+	    "xorl %2,%1 ; "
+	    "pushl %1 ; "
+	    "popfl ; "
+	    "pushfl ; "
+	    "popl %1 ; "
+	    "popfl"
+	    : "=&r" (f0), "=&r" (f1)
+	    : "ri" (flag));
+
+	return !!((f0^f1) & flag);
+}
+
+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");
+}
+
+static inline void hlt(void)
+{
+    asm volatile("hlt");
+}
+
+static inline void cli(void)
+{
+    asm volatile("cli");
+}
+
+static inline void sti(void)
+{
+    asm volatile("sti");
+}
+
+#endif