为什么补丁找不到这个文件？

我想将一个补丁应用到u-boot源代码,但有些如何,Linux不允许我这样做.是)我有的:

reg@ubuntu:~/NextGen/trunk/FW/thirdparty/u-boot$ patch -p1 < ../u-boot/u-boot-2013.01-wr.patch 
can't find file to patch at input line 4
Perhaps you used the wrong -p or --strip option?
The text leading up to this was:
--------------------------
|diff -uNr u-boot-2013.01/arch/powerpc/cpu/mpc85xx/cpu_init.c u-boot-2013.01.modified/arch/powerpc/cpu/mpc85xx/cpu_init.c
|--- u-boot-2013.01/arch/powerpc/cpu/mpc85xx/cpu_init.c 2013-01-15 13:47:42.000000000 -0800
|+++ u-boot-2013.01.modified/arch/powerpc/cpu/mpc85xx/cpu_init.c        2013-05-16 10:58:08.973906692 -0700
--------------------------
File to patch: ^C
reg@ubuntu:~/NextGen/trunk/FW/thirdparty/u-boot$ ls -l u-boot-2013.01/arch/powerpc/cpu/mpc85xx/cpu_init.c
-rw-r--r-- 1 reg reg 16745 Jan 15  2013 u-boot-2013.01/arch/powerpc/cpu/mpc85xx/cpu_init.c
reg@ubuntu:~/NextGen/trunk/FW/thirdparty/u-boot$ 

那么为什么它在完美的位置找不到文件呢？这里发生了什么？