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/*
* File: arch/blackfin/mach-common/cplbinfo.c
* Based on:
* Author: Sonic Zhang <sonic.zhang@analog.com>
*
* Created: Jan. 2005
* Description: Display CPLB status
*
* Modified:
* Copyright 2004-2006 Analog Devices Inc.
*
* Bugs: Enter bugs at http://blackfin.uclinux.org/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see the file COPYING, or write
* to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/uaccess.h>
#include <asm/current.h>
#include <asm/system.h>
#include <asm/cplb.h>
#include <asm/cplbinit.h>
#include <asm/blackfin.h>
static char page_size_string_table[][4] = { "1K", "4K", "1M", "4M" };
static char *cplb_print_entry(char *buf, struct cplb_entry *tbl, int switched)
{
int i;
buf += sprintf(buf, "Index\tAddress\t\tData\tSize\tU/RD\tU/WR\tS/WR\tSwitch\n");
for (i = 0; i < MAX_CPLBS; i++) {
unsigned long data = tbl[i].data;
unsigned long addr = tbl[i].addr;
if (!(data & CPLB_VALID))
continue;
buf +=
sprintf(buf,
"%d\t0x%08lx\t%06lx\t%s\t%c\t%c\t%c\t%c\n",
i, addr, data,
page_size_string_table[(data & 0x30000) >> 16],
(data & CPLB_USER_RD) ? 'Y' : 'N',
(data & CPLB_USER_WR) ? 'Y' : 'N',
(data & CPLB_SUPV_WR) ? 'Y' : 'N',
i < switched ? 'N' : 'Y');
}
buf += sprintf(buf, "\n");
return buf;
}
int cplbinfo_proc_output(char *buf)
{
char *p;
p = buf;
p += sprintf(p, "------------------ CPLB Information ------------------\n\n");
if (bfin_read_IMEM_CONTROL() & ENICPLB) {
p += sprintf(p, "Instruction CPLB entry:\n");
p = cplb_print_entry(p, icplb_tbl, first_switched_icplb);
} else
p += sprintf(p, "Instruction CPLB is disabled.\n\n");
if (1 || bfin_read_DMEM_CONTROL() & ENDCPLB) {
p += sprintf(p, "Data CPLB entry:\n");
p = cplb_print_entry(p, dcplb_tbl, first_switched_dcplb);
} else
p += sprintf(p, "Data CPLB is disabled.\n");
p += sprintf(p, "ICPLB miss: %d\nICPLB supervisor miss: %d\n",
nr_icplb_miss, nr_icplb_supv_miss);
p += sprintf(p, "DCPLB miss: %d\nDCPLB protection fault:%d\n",
nr_dcplb_miss, nr_dcplb_prot);
p += sprintf(p, "CPLB flushes: %d\n",
nr_cplb_flush);
return p - buf;
}
static int cplbinfo_read_proc(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
int len;
len = cplbinfo_proc_output(page);
if (len <= off + count)
*eof = 1;
*start = page + off;
len -= off;
if (len > count)
len = count;
if (len < 0)
len = 0;
return len;
}
static int __init cplbinfo_init(void)
{
struct proc_dir_entry *entry;
entry = create_proc_entry("cplbinfo", 0, NULL);
if (!entry)
return -ENOMEM;
entry->read_proc = cplbinfo_read_proc;
entry->data = NULL;
return 0;
}
static void __exit cplbinfo_exit(void)
{
remove_proc_entry("cplbinfo", NULL);
}
module_init(cplbinfo_init);
module_exit(cplbinfo_exit);
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