Merge branch 'linux-2.6'

1 files changed, 211 insertions, 0 deletions

diff --git a/arch/blackfin/mach-common/cplbinfo.c b/arch/blackfin/mach-common/cplbinfo.c
new file mode 100644
index 00000000000..d65fac39d1b
--- /dev/null
+++ b/arch/blackfin/mach-common/cplbinfo.c
@@ -0,0 +1,211 @@
+/*
+ * 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);