b97b8a9983
Enable it with CONFIG_MPU. Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
144 lines
3.7 KiB
C
144 lines
3.7 KiB
C
/*
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* File: arch/blackfin/mach-common/cplbinfo.c
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* Based on:
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* Author: Sonic Zhang <sonic.zhang@analog.com>
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*
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* Created: Jan. 2005
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* Description: Display CPLB status
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*
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* Modified:
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* Copyright 2004-2006 Analog Devices Inc.
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*
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* Bugs: Enter bugs at http://blackfin.uclinux.org/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/proc_fs.h>
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#include <linux/uaccess.h>
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#include <asm/current.h>
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#include <asm/system.h>
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#include <asm/cplb.h>
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#include <asm/cplbinit.h>
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#include <asm/blackfin.h>
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#define CPLB_I 1
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#define CPLB_D 2
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#define SYNC_SYS SSYNC()
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#define SYNC_CORE CSYNC()
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#define CPLB_BIT_PAGESIZE 0x30000
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static char page_size_string_table[][4] = { "1K", "4K", "1M", "4M" };
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static char *cplb_print_entry(char *buf, struct cplb_entry *tbl, int switched)
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{
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int i;
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buf += sprintf(buf, "Index\tAddress\t\tData\tSize\tU/RD\tU/WR\tS/WR\tSwitch\n");
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for (i = 0; i < MAX_CPLBS; i++) {
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unsigned long data = tbl[i].data;
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unsigned long addr = tbl[i].addr;
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if (!(data & CPLB_VALID))
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continue;
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buf +=
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sprintf(buf,
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"%d\t0x%08lx\t%06lx\t%s\t%c\t%c\t%c\t%c\n",
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i, addr, data,
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page_size_string_table[(data & 0x30000) >> 16],
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(data & CPLB_USER_RD) ? 'Y' : 'N',
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(data & CPLB_USER_WR) ? 'Y' : 'N',
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(data & CPLB_SUPV_WR) ? 'Y' : 'N',
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i < switched ? 'N' : 'Y');
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}
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buf += sprintf(buf, "\n");
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return buf;
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}
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int cplbinfo_proc_output(char *buf)
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{
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char *p;
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p = buf;
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p += sprintf(p, "------------------ CPLB Information ------------------\n\n");
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if (bfin_read_IMEM_CONTROL() & ENICPLB) {
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p += sprintf(p, "Instruction CPLB entry:\n");
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p = cplb_print_entry(p, icplb_tbl, first_switched_icplb);
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} else
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p += sprintf(p, "Instruction CPLB is disabled.\n\n");
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if (1 || bfin_read_DMEM_CONTROL() & ENDCPLB) {
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p += sprintf(p, "Data CPLB entry:\n");
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p = cplb_print_entry(p, dcplb_tbl, first_switched_dcplb);
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} else
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p += sprintf(p, "Data CPLB is disabled.\n");
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p += sprintf(p, "ICPLB miss: %d\nICPLB supervisor miss: %d\n",
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nr_icplb_miss, nr_icplb_supv_miss);
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p += sprintf(p, "DCPLB miss: %d\nDCPLB protection fault:%d\n",
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nr_dcplb_miss, nr_dcplb_prot);
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p += sprintf(p, "CPLB flushes: %d\n",
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nr_cplb_flush);
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return p - buf;
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}
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static int cplbinfo_read_proc(char *page, char **start, off_t off,
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int count, int *eof, void *data)
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{
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int len;
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len = cplbinfo_proc_output(page);
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if (len <= off + count)
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*eof = 1;
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*start = page + off;
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len -= off;
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if (len > count)
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len = count;
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if (len < 0)
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len = 0;
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return len;
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}
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static int __init cplbinfo_init(void)
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{
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struct proc_dir_entry *entry;
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entry = create_proc_entry("cplbinfo", 0, NULL);
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if (!entry)
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return -ENOMEM;
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entry->read_proc = cplbinfo_read_proc;
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entry->data = NULL;
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return 0;
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}
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static void __exit cplbinfo_exit(void)
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{
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remove_proc_entry("cplbinfo", NULL);
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}
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module_init(cplbinfo_init);
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module_exit(cplbinfo_exit);
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