1 files changed, 144 insertions, 0 deletions

diff --git a/arch/blackfin/kernel/cplb-mpu/cplbinfo.c b/arch/blackfin/kernel/cplb-mpu/cplbinfo.c
new file mode 100644
index 000000000000..bd072299f7f2
--- /dev/null
+++ b/arch/blackfin/kernel/cplb-mpu/cplbinfo.c
@@ -0,0 +1,144 @@
+/*
+ * 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>
+
+#define CPLB_I 1
+#define CPLB_D 2
+
+#define SYNC_SYS    SSYNC()
+#define SYNC_CORE   CSYNC()
+
+#define CPLB_BIT_PAGESIZE 0x30000
+
+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);