137 lines
3.5 KiB
C
137 lines
3.5 KiB
C
/*
|
|
* 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);
|