1 files changed, 39 insertions, 0 deletions

diff --git a/arch/x86/include/asm/trampoline.h b/arch/x86/include/asm/trampoline.h
new file mode 100644
index 00000000000..feca3118a73
--- /dev/null
+++ b/arch/x86/include/asm/trampoline.h
@@ -0,0 +1,39 @@
+#ifndef _ASM_X86_TRAMPOLINE_H
+#define _ASM_X86_TRAMPOLINE_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/types.h>
+#include <asm/io.h>
+
+/*
+ * Trampoline 80x86 program as an array.  These are in the init rodata
+ * segment, but that's okay, because we only care about the relative
+ * addresses of the symbols.
+ */
+extern const unsigned char x86_trampoline_start [];
+extern const unsigned char x86_trampoline_end   [];
+extern unsigned char *x86_trampoline_base;
+
+extern unsigned long init_rsp;
+extern unsigned long initial_code;
+extern unsigned long initial_gs;
+
+extern void __init setup_trampolines(void);
+
+extern const unsigned char trampoline_data[];
+extern const unsigned char trampoline_status[];
+
+#define TRAMPOLINE_SYM(x)                                               \
+        ((void *)(x86_trampoline_base +                                 \
+                  ((const unsigned char *)(x) - x86_trampoline_start)))
+
+/* Address of the SMP trampoline */
+static inline unsigned long trampoline_address(void)
+{
+        return virt_to_phys(TRAMPOLINE_SYM(trampoline_data));
+}
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_X86_TRAMPOLINE_H */