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updated to work on all platforms (actually map sure that the physical

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address we are trying to access is mapped before accessing it.)

--HG--
extra : convert_revision : 104341334a3d2bb812a6b0b6277ab353f8f9b39e
This commit is contained in:
Ali Saidi 2004-07-05 16:49:56 -04:00
parent 3512904c74
commit fe3a86e2ef
1 changed files with 28 additions and 10 deletions
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38
util/ccdrv/devtime.c
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@ -34,6 +34,7 @@
#include <asm/uaccess.h> #include <asm/uaccess.h>
#include <linux/kernel.h> #include <linux/kernel.h>
#include <asm/io.h> #include <asm/io.h>
#include <asm/page.h>
#include <linux/netdevice.h> #include <linux/netdevice.h>
#ifdef __i386__ #ifdef __i386__
@ -70,18 +71,34 @@ static int __init devtime_start(void)
devSum = 0; devSum = 0;
devCnt = count; devCnt = count;
printk("Preparing to read %#llx %d times.\n", addr, count); addr = ioremap(addr, PAGE_SIZE);
/**
t1 = cycleCounter(trash); * Make sure that the remapping actually worked. On alpha we have
for (x=0; x < count; x++) * linear addressing, so its not a problem. But it can fail in x86
* if physical memory is mapped to this address.
*/
if (addr)
{ {
trash = readl(addr); printk("Preparing to read %#llx %d times.\n", addr, count);
t2 = cycleCounter(trash);
devSum += t2 - t1;
t1 = t2;
}
printk("Read Address %#llx %ld times. Average latency %ld.\n", addr, devCnt, devSum/devCnt); t1 = cycleCounter(trash);
for (x=0; x < count; x++)
{
trash = readl(addr);
t2 = cycleCounter(trash);
devSum += t2 - t1;
t1 = t2;
}
/**
* Unmap the address.
*/
iounmap(addr);
printk("Read Address %#llx %ld times. Average latency %ld.\n", addr, devCnt, devSum/devCnt);
}
else
printk("Unable to remap address. Please try again later.\n");
} else { } else {
dev = dev_get_by_name("eth0"); dev = dev_get_by_name("eth0");
if (dev) if (dev)
@ -90,6 +107,7 @@ static int __init devtime_start(void)
dev->mem_end, dev->base_addr); dev->mem_end, dev->base_addr);
dev_put(dev); dev_put(dev);
} }
dev = 0;
dev = dev_get_by_name("eth1"); dev = dev_get_by_name("eth1");
if (dev) if (dev)
{ {