00163e869e
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
211 lines
5.2 KiB
C
211 lines
5.2 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 <asm/current.h>
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#include <asm/uaccess.h>
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#include <asm/system.h>
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#include <asm/cplb.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 int page_size_table[4] = {
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0x00000400, /* 1K */
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0x00001000, /* 4K */
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0x00100000, /* 1M */
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0x00400000 /* 4M */
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};
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static char page_size_string_table[][4] = { "1K", "4K", "1M", "4M" };
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static int cplb_find_entry(unsigned long *cplb_addr,
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unsigned long *cplb_data, unsigned long addr,
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unsigned long data)
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{
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int ii;
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for (ii = 0; ii < 16; ii++)
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if (addr >= cplb_addr[ii] && addr < cplb_addr[ii] +
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page_size_table[(cplb_data[ii] & CPLB_BIT_PAGESIZE) >> 16]
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&& (cplb_data[ii] == data))
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return ii;
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return -1;
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}
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static char *cplb_print_entry(char *buf, int type)
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{
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unsigned long *p_addr = dpdt_table;
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unsigned long *p_data = dpdt_table + 1;
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unsigned long *p_icount = dpdt_swapcount_table;
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unsigned long *p_ocount = dpdt_swapcount_table + 1;
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unsigned long *cplb_addr = (unsigned long *)DCPLB_ADDR0;
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unsigned long *cplb_data = (unsigned long *)DCPLB_DATA0;
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int entry = 0, used_cplb = 0;
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if (type == CPLB_I) {
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buf += sprintf(buf, "Instruction CPLB entry:\n");
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p_addr = ipdt_table;
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p_data = ipdt_table + 1;
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p_icount = ipdt_swapcount_table;
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p_ocount = ipdt_swapcount_table + 1;
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cplb_addr = (unsigned long *)ICPLB_ADDR0;
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cplb_data = (unsigned long *)ICPLB_DATA0;
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} else
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buf += sprintf(buf, "Data CPLB entry:\n");
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buf += sprintf(buf, "Address\t\tData\tSize\tValid\tLocked\tSwapin\
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\tiCount\toCount\n");
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while (*p_addr != 0xffffffff) {
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entry = cplb_find_entry(cplb_addr, cplb_data, *p_addr, *p_data);
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if (entry >= 0)
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used_cplb |= 1 << entry;
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buf +=
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sprintf(buf,
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"0x%08lx\t0x%05lx\t%s\t%c\t%c\t%2d\t%ld\t%ld\n",
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*p_addr, *p_data,
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page_size_string_table[(*p_data & 0x30000) >> 16],
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(*p_data & CPLB_VALID) ? 'Y' : 'N',
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(*p_data & CPLB_LOCK) ? 'Y' : 'N', entry, *p_icount,
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*p_ocount);
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p_addr += 2;
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p_data += 2;
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p_icount += 2;
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p_ocount += 2;
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}
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if (used_cplb != 0xffff) {
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buf += sprintf(buf, "Unused/mismatched CPLBs:\n");
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for (entry = 0; entry < 16; entry++)
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if (0 == ((1 << entry) & used_cplb)) {
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int flags = cplb_data[entry];
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buf +=
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sprintf(buf,
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"%2d: 0x%08lx\t0x%05x\t%s\t%c\t%c\n",
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entry, cplb_addr[entry], flags,
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page_size_string_table[(flags &
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0x30000) >>
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16],
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(flags & CPLB_VALID) ? 'Y' : 'N',
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(flags & CPLB_LOCK) ? 'Y' : 'N');
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}
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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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static 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,
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"------------------ CPLB Information ------------------\n\n");
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if (bfin_read_IMEM_CONTROL() & ENICPLB)
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p = cplb_print_entry(p, CPLB_I);
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else
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p += sprintf(p, "Instruction CPLB is disabled.\n\n");
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if (bfin_read_DMEM_CONTROL() & ENDCPLB)
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p = cplb_print_entry(p, CPLB_D);
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else
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p += sprintf(p, "Data CPLB is disabled.\n");
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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 cplbinfo_write_proc(struct file *file, const char __user *buffer,
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unsigned long count, void *data)
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{
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printk(KERN_INFO "Reset the CPLB swap in/out counts.\n");
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memset(ipdt_swapcount_table, 0, MAX_SWITCH_I_CPLBS * sizeof(unsigned long));
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memset(dpdt_swapcount_table, 0, MAX_SWITCH_D_CPLBS * sizeof(unsigned long));
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return count;
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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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if ((entry = create_proc_entry("cplbinfo", 0, NULL)) == NULL) {
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return -ENOMEM;
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}
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entry->read_proc = cplbinfo_read_proc;
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entry->write_proc = cplbinfo_write_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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