/*
* 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 <asm/current.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/cplb.h>
#include <asm/blackfin.h>
#define CPLB_I 1
#define CPLB_D 2
#define SYNC_SYS SSYNC()
#define SYNC_CORE CSYNC()
#define CPLB_BIT_PAGESIZE 0x30000
static int page_size_table[4] = {
0x00000400, /* 1K */
0x00001000, /* 4K */
0x00100000, /* 1M */
0x00400000 /* 4M */
};
static char page_size_string_table[][4] = { "1K", "4K", "1M", "4M" };
static int cplb_find_entry(unsigned long *cplb_addr,
unsigned long *cplb_data, unsigned long addr,
unsigned long data)
{
int ii;
for (ii = 0; ii < 16; ii++)
if (addr >= cplb_addr[ii] && addr < cplb_addr[ii] +
page_size_table[(cplb_data[ii] & CPLB_BIT_PAGESIZE) >> 16]
&& (cplb_data[ii] == data))
return ii;
return -1;
}
static char *cplb_print_entry(char *buf, int type)
{
unsigned long *p_addr = dpdt_table;
unsigned long *p_data = dpdt_table + 1;
unsigned long *p_icount = dpdt_swapcount_table;
unsigned long *p_ocount = dpdt_swapcount_table + 1;
unsigned long *cplb_addr = (unsigned long *)DCPLB_ADDR0;
unsigned long *cplb_data = (unsigned long *)DCPLB_DATA0;
int entry = 0, used_cplb = 0;
if (type == CPLB_I) {
buf += sprintf(buf, "Instrction CPLB entry:\n");
p_addr = ipdt_table;
p_data = ipdt_table + 1;
p_icount = ipdt_swapcount_table;
p_ocount = ipdt_swapcount_table + 1;
cplb_addr = (unsigned long *)ICPLB_ADDR0;
cplb_data = (unsigned long *)ICPLB_DATA0;
} else
buf += sprintf(buf, "Data CPLB entry:\n");
buf += sprintf(buf, "Address\t\tData\tSize\tValid\tLocked\tSwapin\
\tiCount\toCount\n");
while (*p_addr != 0xffffffff) {
entry = cplb_find_entry(cplb_addr, cplb_data, *p_addr, *p_data);
if (entry >= 0)
used_cplb |= 1 << entry;
buf +=
sprintf(buf,
"0x%08lx\t0x%05lx\t%s\t%c\t%c\t%2d\t%ld\t%ld\n",
*p_addr, *p_data,
page_size_string_table[(*p_data & 0x30000) >> 16],
(*p_data & CPLB_VALID) ? 'Y' : 'N',
(*p_data & CPLB_LOCK) ? 'Y' : 'N', entry, *p_icount,
*p_ocount);
p_addr += 2;
p_data += 2;
p_icount += 2;
p_ocount += 2;
}
if (used_cplb != 0xffff) {
buf += sprintf(buf, "Unused/mismatched CPLBs:\n");
for (entry = 0; entry < 16; entry++)
if (0 == ((1 << entry) & used_cplb)) {
int flags = cplb_data[entry];
buf +=
sprintf(buf,
"%2d: 0x%08lx\t0x%05x\t%s\t%c\t%c\n",
entry, cplb_addr[entry], flags,
page_size_string_table[(flags &
0x30000) >>
16],
(flags & CPLB_VALID) ? 'Y' : 'N',
(flags & CPLB_LOCK) ? 'Y' : 'N');
}
}
buf += sprintf(buf, "\n");
return buf;
}
static int cplbinfo_proc_output(char *buf)
{
char *p;
p = buf;
p += sprintf(p,
"------------------ CPLB Information ------------------\n\n");
if (bfin_read_IMEM_CONTROL() & ENICPLB)
p = cplb_print_entry(p, CPLB_I);
else
p += sprintf(p, "Instruction CPLB is disabled.\n\n");
if (bfin_read_DMEM_CONTROL() & ENDCPLB)
p = cplb_print_entry(p, CPLB_D);
else
p += sprintf(p, "Data CPLB is disabled.\n");
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 cplbinfo_write_proc(struct file *file, const char __user *buffer,
unsigned long count, void *data)
{
printk(KERN_INFO "Reset the CPLB swap in/out counts.\n");
memset(ipdt_swapcount_table, 0, MAX_SWITCH_I_CPLBS * sizeof(unsigned long));
memset(dpdt_swapcount_table, 0, MAX_SWITCH_D_CPLBS * sizeof(unsigned long));
return count;
}
static int __init cplbinfo_init(void)
{
struct proc_dir_entry *entry;
if ((entry = create_proc_entry("cplbinfo", 0, NULL)) == NULL) {
return -ENOMEM;
}
entry->read_proc = cplbinfo_read_proc;
entry->write_proc = cplbinfo_write_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);
