Inital import

[l4.git] / l4 / pkg / linux-26-headers / include / asm-x86 / delay.h

diff --git a/l4/pkg/linux-26-headers/include/asm-x86/delay.h b/l4/pkg/linux-26-headers/include/asm-x86/delay.h
new file mode 100644 (file)
index 0000000..409a649
--- /dev/null
+++ b/l4/pkg/linux-26-headers/include/asm-x86/delay.h
@@ -0,0 +1,31 @@
+#ifndef _ASM_X86_DELAY_H
+#define _ASM_X86_DELAY_H
+
+/*
+ * Copyright (C) 1993 Linus Torvalds
+ *
+ * Delay routines calling functions in arch/x86/lib/delay.c
+ */
+
+/* Undefined functions to get compile-time errors */
+extern void __bad_udelay(void);
+extern void __bad_ndelay(void);
+
+extern void __udelay(unsigned long usecs);
+extern void __ndelay(unsigned long nsecs);
+extern void __const_udelay(unsigned long xloops);
+extern void __delay(unsigned long loops);
+
+/* 0x10c7 is 2**32 / 1000000 (rounded up) */
+#define udelay(n) (__builtin_constant_p(n) ? \
+       ((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c7ul)) : \
+       __udelay(n))
+
+/* 0x5 is 2**32 / 1000000000 (rounded up) */
+#define ndelay(n) (__builtin_constant_p(n) ? \
+       ((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) : \
+       __ndelay(n))
+
+void use_tsc_delay(void);
+
+#endif /* _ASM_X86_DELAY_H */