#include <linux/init.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <asm/ptrace.h>
#include <linux/uaccess.h>

#define SAMPLE_BUFFER_SIZE 8192

static char *sample_buffer;
static char *sample_buffer_pos;
static int prof_running = 0;

void cris_profile_sample(struct pt_regs *regs)
{
	if (!prof_running)
		return;

	if (user_mode(regs))
		*(unsigned int*)sample_buffer_pos = current->pid;
	else
		*(unsigned int*)sample_buffer_pos = 0;

	*(unsigned int *)(sample_buffer_pos + 4) = instruction_pointer(regs);
	sample_buffer_pos += 8;

	if (sample_buffer_pos == sample_buffer + SAMPLE_BUFFER_SIZE)
		sample_buffer_pos = sample_buffer;
}

static ssize_t
read_cris_profile(struct file *file, char __user *buf,
		  size_t count, loff_t *ppos)
{
	unsigned long p = *ppos;
	ssize_t ret;

	ret = simple_read_from_buffer(buf, count, ppos, sample_buffer,
						SAMPLE_BUFFER_SIZE);
	if (ret < 0)
		return ret;

	memset(sample_buffer + p, 0, ret);

	return ret;
}

static ssize_t
write_cris_profile(struct file *file, const char __user *buf,
		   size_t count, loff_t *ppos)
{
	sample_buffer_pos = sample_buffer;
	memset(sample_buffer, 0, SAMPLE_BUFFER_SIZE);
	return count < SAMPLE_BUFFER_SIZE ? count : SAMPLE_BUFFER_SIZE;
}

static const struct file_operations cris_proc_profile_operations = {
	.read		= read_cris_profile,
	.write		= write_cris_profile,
	.llseek		= default_llseek,
};

static int __init init_cris_profile(void)
{
	struct proc_dir_entry *entry;

	sample_buffer = kmalloc(SAMPLE_BUFFER_SIZE, GFP_KERNEL);
	if (!sample_buffer) {
		return -ENOMEM;
	}

	sample_buffer_pos = sample_buffer;

	entry = proc_create("system_profile", S_IWUSR | S_IRUGO, NULL,
			    &cris_proc_profile_operations);
	if (entry) {
		proc_set_size(entry, SAMPLE_BUFFER_SIZE);
	}
	prof_running = 1;

	return 0;
}
__initcall(init_cris_profile);

/pacache.S?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>commit</a><a class='active' href='/cgit.cgi/linux/net-next.git/diff/arch/parisc/kernel/pacache.S?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/arch/parisc/kernel/pacache.S'>
<input type='hidden' name='id' value='5db4992d8f040b8d8db0b86d42806e0c417f7ccf'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/diff/?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>root</a>/<a href='/cgit.cgi/linux/net-next.git/diff/arch?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>arch</a>/<a href='/cgit.cgi/linux/net-next.git/diff/arch/parisc?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>parisc</a>/<a href='/cgit.cgi/linux/net-next.git/diff/arch/parisc/kernel?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>kernel</a>/<a href='/cgit.cgi/linux/net-next.git/diff/arch/parisc/kernel/pacache.S?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>pacache.S</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='5db4992d8f040b8d8db0b86d42806e0c417f7ccf'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>Diffstat</a> (limited to 'arch/parisc/kernel/pacache.S')</div><table summary='diffstat' class='diffstat'>