1015.cpucache.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 linux-2.6.15.ref/arch/mips/tangox/cpucache.c linux-2.6.15/arch/mips/tangox/cpucache.c
--- linux-2.6.15.ref/arch/mips/tangox/cpucache.c	1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.15/arch/mips/tangox/cpucache.c	2006-11-21 16:54:50.000000000 -0800
@@ -0,0 +1,112 @@
+/*****************************************
+ Copyright 漏 2001-2003  
+ Sigma Designs, Inc. All Rights Reserved
+ Proprietary and Confidential
+ *****************************************/
+/**
+  @file  cpucache.c
+  @brief  
+
+  Implementing /proc/cpucache_info interface
+
+  @author YH Lin
+  @date   2006-08-16
+*/
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+
+#ifdef CONFIG_TANGO2
+#include <asm/tango2/hardware.h>
+#include <asm/tango2/tango2api.h>
+#include <asm/tango2/tango2_gbus.h>
+#elif defined(CONFIG_TANGO3)
+#include <asm/tango3/hardware.h>
+#include <asm/tango3/tango3api.h>
+#include <asm/tango3/tango3_gbus.h>
+#endif
+
+#if (defined(CONFIG_TANGO2) && (EM86XX_REVISION > 3)) 
+static int cpucache_info_read_proc(char *buf, char **start, off_t off, int count, int *eof, void *data);
+static unsigned long cpucache_saved_jiffies = 0;
+static unsigned icache_missed = 0, dcache_missed = 0;
+
+extern unsigned long em8xxx_cpu_frequency;
+
+//
+// init
+//
+int __init cpucache_info_init(void)
+{
+	create_proc_read_entry("cpucache_info", S_IRUGO, NULL, cpucache_info_read_proc, NULL);
+
+        printk("Created /proc/cpucache_info entry.\n");
+
+	/* Enable performance monitor and start counting */
+	/* 0: DCache Hit 
+	 * 1: DCache Miss
+	 * 2: TLB Hit
+	 * 3: TLB Miss
+	 * 4: ICache Hit
+	 * 5: ICache Miss
+	 * 6: Instn Complete
+	 * 7: ITLB Hit
+	 * 8: ITLB Miss
+	 * 9: JTLB Hit
+	 * 10: JTLB Miss
+	 * 11: WTB Merge */
+	gbus_writel(REG_BASE_cpu_block + CPU_pm_select_1, (1<<5));
+	gbus_writel(REG_BASE_cpu_block + CPU_pm_select_0, (1<<1));
+	cpucache_saved_jiffies = jiffies;
+	icache_missed = gbus_readl(REG_BASE_cpu_block + CPU_pm_counter_1);
+	dcache_missed = gbus_readl(REG_BASE_cpu_block + CPU_pm_counter_0);
+	return 0;
+}
+
+__initcall(cpucache_info_init);
+
+static int cpucache_info_read_proc(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+        int len = 0;
+	unsigned long diffj, diffi, diffd, icache_miss, dcache_miss, tmpj;
+	unsigned long pd, pi;
+        
+	icache_miss = gbus_read_uint32(pGBus, REG_BASE_cpu_block + CPU_pm_counter_1);
+	dcache_miss = gbus_read_uint32(pGBus, REG_BASE_cpu_block + CPU_pm_counter_0);
+	tmpj = jiffies;
+	diffj = tmpj - cpucache_saved_jiffies; 
+	cpucache_saved_jiffies = tmpj;
+	if (diffj == 0)
+		diffj = 1;
+
+	if (icache_miss < icache_missed)
+		diffi = (0xffffffff - icache_missed) + icache_miss;
+	else
+		diffi = icache_miss - icache_missed;
+	icache_missed = icache_miss;
+
+	if (dcache_miss < dcache_missed)
+		diffd = (0xffffffff - dcache_missed) + dcache_miss;
+	else
+		diffd = dcache_miss - dcache_missed;
+	dcache_missed = dcache_miss;
+
+	len += sprintf(page+off+len, "jiffies");
+	/* The average miss per jiffies is (diffx / diffj), per second is then ((diffx * HZ) / diffj).
+	 * Assuming one instruction per clock, we have (((diffx * HZ) / diffj) / em8xxx_cpu_frequency)
+	 * as average ratio of cache miss per instruction at given period of time (from last 
+	 * measured, as expressed as (diffj / HZ)). */
+	pi = ((diffi * HZ) / diffj) / (em8xxx_cpu_frequency / 10000); /* Times 10000 to get percentage */
+	pd = ((diffd * HZ) / diffj) / (em8xxx_cpu_frequency / 10000);
+
+	len += sprintf(page+off+len, "(%ld): I-Cache miss ratio(%ld): %ld.%02ld%c, D-Cache miss ratio(%ld): %ld.%02ld%c\n",
+			diffj, diffi, pi / 100, pi % 100, '%', diffd, pd / 100, pd % 100, '%');
+	*eof = 1;
+
+        return(len);
+}
+#endif /* CONFIG_TANGO2 && (EM86XX_REVISION > 3) */
+
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 linux-2.6.15.ref/arch/mips/tangox/Makefile linux-2.6.15/arch/mips/tangox/Makefile
--- linux-2.6.15.ref/arch/mips/tangox/Makefile	2006-11-21 16:53:26.000000000 -0800
+++ linux-2.6.15/arch/mips/tangox/Makefile	2006-11-21 16:54:50.000000000 -0800
@@ -24,3 +24,5 @@
 
 clean-files += $(shell $(MAKE) -C $(TOPDIR)/arch/mips/tangox/fctrl/lib/fc clean)
 
+obj-y += cpucache.o
+
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 linux-2.6.15.ref/README.1015.cpucache.patch linux-2.6.15/README.1015.cpucache.patch
--- linux-2.6.15.ref/README.1015.cpucache.patch	1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.15/README.1015.cpucache.patch	2006-11-21 16:55:44.000000000 -0800
@@ -0,0 +1,19 @@
+Feature:
+--------
+Implementing /proc/cpucache_info for printing CPU cache related information.
+
+Prerequisite patch numbers:
+---------------------------
+0000
+1000
+
+Primary author:
+---------------
+YH Lin
+
+Related to which chip version SMP86xx xx=?
+-----------------------------------------
+Tango2 ES6/RevA or above, or Tango3 ES1 or above
+
+(linux patches) which CONFIG_... are provided:
+----------------------------------------------