1033.cacheflush.patch

sm86xx内核源包括补丁（ GPL ）的

diff -Naur --exclude=CVS --exclude='*.o' --exclude='*.a' --exclude='*.so' --exclude='*.elf' --exclude=System.map --exclude=Makefile.d --exclude='*log' --exclude='*log2' --exclude='*~' --exclude='.*~' --exclude='.#*' --exclude='*.bak' --exclude='*.orig' --exclude='*.rej' --exclude='core.[0-9]*' --exclude=.depend --exclude='.*.o.flags' --exclude='*.gz' --exclude=.depend --exclude='.*.o.flags' --exclude='*.gz' --exclude=vmlinux --exclude=vmlinux.bin --exclude=yamon-02.06-SIGMADESIGNS-01_el.bin linuxmips-2.4.30.ref/arch/mips/mm/cache.c linuxmips-2.4.30/arch/mips/mm/cache.c
--- linuxmips-2.4.30.ref/arch/mips/mm/cache.c	2003-07-18 07:16:06.000000000 -0700
+++ linuxmips-2.4.30/arch/mips/mm/cache.c	2006-11-30 15:08:48.000000000 -0800
@@ -11,12 +11,28 @@
 #include <linux/mm.h>
 
 #include <asm/cacheflush.h>
+#include <asm/uaccess.h>
 
 asmlinkage int sys_cacheflush(void *addr, int bytes, int cache)
 {
+#if 0
 	/* This should flush more selectivly ...  */
 	__flush_cache_all();
-
+#else
+	if (bytes == 0)
+		return 0;
+	if (!access_ok(VERIFY_WRITE, (void *)addr, bytes))
+		return -EFAULT;
+
+	if (cache & ICACHE)
+		flush_icache_range((unsigned long)addr, ((unsigned long)addr) + bytes);
+	if (cache & DCACHE) {
+		unsigned long start_addr;
+		for (start_addr = (unsigned long)addr; start_addr < (((unsigned long)addr) + bytes); 
+				start_addr += PAGE_SIZE)
+			flush_data_cache_page(start_addr);
+	}
+#endif
 	return 0;
 }
 
diff -Naur --exclude=CVS --exclude='*.o' --exclude='*.a' --exclude='*.so' --exclude='*.elf' --exclude=System.map --exclude=Makefile.d --exclude='*log' --exclude='*log2' --exclude='*~' --exclude='.*~' --exclude='.#*' --exclude='*.bak' --exclude='*.orig' --exclude='*.rej' --exclude='core.[0-9]*' --exclude=.depend --exclude='.*.o.flags' --exclude='*.gz' --exclude=.depend --exclude='.*.o.flags' --exclude='*.gz' --exclude=vmlinux --exclude=vmlinux.bin --exclude=yamon-02.06-SIGMADESIGNS-01_el.bin linuxmips-2.4.30.ref/README.1033.cacheflush.patch linuxmips-2.4.30/README.1033.cacheflush.patch
--- linuxmips-2.4.30.ref/README.1033.cacheflush.patch	1969-12-31 16:00:00.000000000 -0800
+++ linuxmips-2.4.30/README.1033.cacheflush.patch	2006-11-30 15:10:11.000000000 -0800
@@ -0,0 +1,18 @@
+Feature:
+--------
+More optimization on cacheflush system call.
+
+Prerequisite patch numbers:
+---------------------------
+none
+
+Primary author:
+---------------
+YH Lin
+
+Related to which chip version SMP86xx xx=?
+------------------------------------------
+all
+
+(linux patches) which CONFIG_... are provided:
+----------------------------------------------