Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / mips / include / asm / ftrace.h

diff --git a/kernel/arch/mips/include/asm/ftrace.h b/kernel/arch/mips/include/asm/ftrace.h
new file mode 100644 (file)
index 0000000..b463f2a
--- /dev/null
+++ b/kernel/arch/mips/include/asm/ftrace.h
@@ -0,0 +1,90 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive for
+ * more details.
+ *
+ * Copyright (C) 2009 DSLab, Lanzhou University, China
+ * Author: Wu Zhangjin <wuzhangjin@gmail.com>
+ */
+
+#ifndef _ASM_MIPS_FTRACE_H
+#define _ASM_MIPS_FTRACE_H
+
+#ifdef CONFIG_FUNCTION_TRACER
+
+#define MCOUNT_ADDR ((unsigned long)(_mcount))
+#define MCOUNT_INSN_SIZE 4             /* sizeof mcount call */
+
+#ifndef __ASSEMBLY__
+extern void _mcount(void);
+#define mcount _mcount
+
+#define safe_load(load, src, dst, error)               \
+do {                                                   \
+       asm volatile (                                  \
+               "1: " load " %[tmp_dst], 0(%[tmp_src])\n"       \
+               "   li %[tmp_err], 0\n"                 \
+               "2: .insn\n"                            \
+                                                       \
+               ".section .fixup, \"ax\"\n"             \
+               "3: li %[tmp_err], 1\n"                 \
+               "   j 2b\n"                             \
+               ".previous\n"                           \
+                                                       \
+               ".section\t__ex_table,\"a\"\n\t"        \
+               STR(PTR) "\t1b, 3b\n\t"                 \
+               ".previous\n"                           \
+                                                       \
+               : [tmp_dst] "=&r" (dst), [tmp_err] "=r" (error)\
+               : [tmp_src] "r" (src)                   \
+               : "memory"                              \
+       );                                              \
+} while (0)
+
+#define safe_store(store, src, dst, error)     \
+do {                                           \
+       asm volatile (                          \
+               "1: " store " %[tmp_src], 0(%[tmp_dst])\n"\
+               "   li %[tmp_err], 0\n"         \
+               "2: .insn\n"                    \
+                                               \
+               ".section .fixup, \"ax\"\n"     \
+               "3: li %[tmp_err], 1\n"         \
+               "   j 2b\n"                     \
+               ".previous\n"                   \
+                                               \
+               ".section\t__ex_table,\"a\"\n\t"\
+               STR(PTR) "\t1b, 3b\n\t"         \
+               ".previous\n"                   \
+                                               \
+               : [tmp_err] "=r" (error)        \
+               : [tmp_dst] "r" (dst), [tmp_src] "r" (src)\
+               : "memory"                      \
+       );                                      \
+} while (0)
+
+#define safe_load_code(dst, src, error) \
+       safe_load(STR(lw), src, dst, error)
+#define safe_store_code(src, dst, error) \
+       safe_store(STR(sw), src, dst, error)
+
+#define safe_load_stack(dst, src, error) \
+       safe_load(STR(PTR_L), src, dst, error)
+
+#define safe_store_stack(src, dst, error) \
+       safe_store(STR(PTR_S), src, dst, error)
+
+
+#ifdef CONFIG_DYNAMIC_FTRACE
+static inline unsigned long ftrace_call_adjust(unsigned long addr)
+{
+       return addr;
+}
+
+struct dyn_arch_ftrace {
+};
+
+#endif /*  CONFIG_DYNAMIC_FTRACE */
+#endif /* __ASSEMBLY__ */
+#endif /* CONFIG_FUNCTION_TRACER */
+#endif /* _ASM_MIPS_FTRACE_H */