Gabe Black has uploaded this change for review. (
https://gem5-review.googlesource.com/c/public/gem5/+/41473 )
Change subject: util: Delete the ccdrv kernel module.
......................................................................
util: Delete the ccdrv kernel module.
This very small kernel module seems to be intended to measure the access
time to device registers when running in a linux kernel. It mentions
kernel version 2.6.x and so is fairly old and may not work with modern
kernels.
While there is probably some utility (no pun intended) to having a
driver like that and that sort of measurement capability, the usefulness
is probably not huge compared to its small but non-zero maintenance
burden. It seems like it's not something that gets active attention
given it's revision history, and is probably just taking up space these
days.
Change-Id: I3b1f44d718d7e6ee23695e3117bb169268f2157a
---
D util/ccdrv/Makefile
D util/ccdrv/devtime.c
D util/ccdrv/readme.txt
3 files changed, 0 insertions(+), 240 deletions(-)
diff --git a/util/ccdrv/Makefile b/util/ccdrv/Makefile
deleted file mode 100644
index bf6700e..0000000
--- a/util/ccdrv/Makefile
+++ /dev/null
@@ -1,27 +0,0 @@
-# Copyright (c) 2004 The Regents of The University of Michigan
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met: redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer;
-# redistributions in binary form must reproduce the above copyright
-# notice, this list of conditions and the following disclaimer in the
-# documentation and/or other materials provided with the distribution;
-# neither the name of the copyright holders nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-obj-m := devtime.o
diff --git a/util/ccdrv/devtime.c b/util/ccdrv/devtime.c
deleted file mode 100644
index 2219237..0000000
--- a/util/ccdrv/devtime.c
+++ /dev/null
@@ -1,195 +0,0 @@
-/*
- * Copyright (c) 2004 The Regents of The University of Michigan
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met: redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer;
- * redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution;
- * neither the name of the copyright holders nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <asm/io.h>
-#include <asm/page.h>
-#include <asm/uaccess.h>
-#include <linux/config.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/netdevice.h>
-
-#ifdef __i386__
-#include <asm/msr.h>
-#include <asm/processor.h>
-#endif
-
-#define DRIVER_AUTHOR "Ali Saidi"
-#define DRIVER_DESC "Interface to time uncacachable read and writes to
device registers"
-#define DRIVER_VER "0.1"
-
-static char *dataAddr = NULL;
-static int count = 0;
-#ifdef __alpha__
-static int memTest = 0;
-#endif
-
-static inline uint32_t cycleCounter(uint32_t dep);
-
-static int __init devtime_start(void)
-{
- uint64_t addr;
- uint32_t t1, t2;
- uint32_t trash;
- int x;
- uint32_t *times;
- uint32_t num = 0;
- struct net_device *dev;
-
- printk("Devtime Driver Version %s Loaded...\n", DRIVER_VER);
-
-#ifdef __alpha__
- if (memTest) {
- addr = 0xfffffc0000000000;
-// addr += 16*1024*1024;
-
- printk("Preparing memory test.\n");
-
- t1 = cycleCounter(trash);
- for (x = 0; x < count; x++) {
- trash = readl(addr);
- t2 = cycleCounter(trash);
- times[num++] = t2 - t1;
- t1 = t2;
- addr += 4096;
- }
-
- printk("Measurements:\n");
- for (x = 0; x < count; x++) {
- printk("%d ", times[x]);
- if (((x + 1) % 10) == 0)
- printk("\n");
- }
- printk("\nDone.\n");
- } else
-#endif
- if (dataAddr != 0 && count != 0) {
- addr = simple_strtoull(dataAddr, NULL, 0);
-
- addr = ioremap(addr, PAGE_SIZE);
- /**
- * Make sure that the remapping actually worked. On alpha we have
- * linear addressing, so its not a problem. But it can fail in x86
- * if physical memory is mapped to this address.
- */
- times = kmalloc(sizeof(uint32_t) * count, GFP_USER);
- if (!times) {
- printk("Could not allocate memory... Try again later.\n");
- return -1;
- }
-
- if (addr) {
- printk("Preparing to read %#llx %d times.\n", addr, count);
-
- t1 = cycleCounter(trash);
- for (x = 0; x < count; x++) {
- trash = readl(addr);
- t2 = cycleCounter(trash);
- times[num++] = t2 - t1;
- t1 = t2;
- }
-
- /**
- * Unmap the address.
- */
- iounmap(addr);
-
- printk("Measurements:\n");
- for (x = 0; x < count; x++) {
- printk("%d ", times[x]);
- if (((x + 1) % 10) == 0)
- printk("\n");
- }
- printk("\nDone.\n");
- } else {
- printk("Unable to remap address. Please try again later.\n");
- }
- } else {
- dev = dev_get_by_name("eth0");
- if (dev) {
- printk("Eth0: MemStart: %#lx MemEnd: %#lx I/O Addr: %#lx\n",
- dev->mem_start, dev->mem_end, dev->base_addr);
- dev_put(dev);
- }
- dev = 0;
- dev = dev_get_by_name("eth1");
- if (dev) {
- printk("Eth1: MemStart: %#lx MemEnd: %#lx I/O Addr: %#lx\n",
- dev->mem_start, dev->mem_end, dev->base_addr);
- dev_put(dev);
- }
-
- printk("Required information not supplied.\n");
- }
-
- return 0;
-}
-
-#ifdef __i386__
-
-static inline uint32_t cycleCounter(uint32_t dep)
-{
- uint32_t time;
- cpuid_eax(0);
- rdtscl(time);
- cpuid_eax(0);
- return time;
-}
-
-#elif __alpha__
-
-inline uint32_t cycleCounter(uint32_t dep)
-{
- uint32_t res;
- asm volatile ("rpcc %0, %1" : "=r"(res) : "r" (dep) : "memory");
- return res;
-}
-#else
-#error Architecture NOT SUPPORTED
-#endif
-
-static void __exit devtime_end(void)
-{
- printk("Devtime Driver Version %s Unloaded...\n", DRIVER_VER);
-}
-
-
-module_init(devtime_start);
-module_exit(devtime_end);
-
-MODULE_LICENSE("Dual BSD/GPL");
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_DESCRIPTION(DRIVER_DESC);
-module_param(dataAddr, charp, 0);
-module_param(count, int, 0);
-#ifdef __alpha__
-module_param(memTest, int, 0);
-#endif
diff --git a/util/ccdrv/readme.txt b/util/ccdrv/readme.txt
deleted file mode 100644
index 4b9892f..0000000
--- a/util/ccdrv/readme.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-This driver will read the address you point it to [count] times and
-print the results to the systemlog.
-
-To build the driver (Linux 2.6.X only) execute:
-make -C /path/to/linux-2.6.X/ SUBDIRS=$PWD modules
-
-
-Insmodding the kernel module without options will print
-the device addresses of eth0 and eth1 if they exist.
-
-Insmodding the kernel module with the options:
-dataAddr=0xXXXXXXXXX and count=XXXXX
-
-will read a long at addr dataAddr count times and return.
-
-Between runs you need to rmmod the module from the kernel.
-
-
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: I3b1f44d718d7e6ee23695e3117bb169268f2157a
Gerrit-Change-Number: 41473
Gerrit-PatchSet: 1
Gerrit-Owner: Gabe Black <gabe.bl...@gmail.com>
Gerrit-MessageType: newchange
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