Blackfin arch: fix spelling typo in output
[linux-2.6.git] / arch / blackfin / mach-common / cplbinfo.c
1 /*
2  * File:         arch/blackfin/mach-common/cplbinfo.c
3  * Based on:
4  * Author:       Sonic Zhang <sonic.zhang@analog.com>
5  *
6  * Created:      Jan. 2005
7  * Description:  Display CPLB status
8  *
9  * Modified:
10  *               Copyright 2004-2006 Analog Devices Inc.
11  *
12  * Bugs:         Enter bugs at http://blackfin.uclinux.org/
13  *
14  * This program is free software; you can redistribute it and/or modify
15  * it under the terms of the GNU General Public License as published by
16  * the Free Software Foundation; either version 2 of the License, or
17  * (at your option) any later version.
18  *
19  * This program is distributed in the hope that it will be useful,
20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22  * GNU General Public License for more details.
23  *
24  * You should have received a copy of the GNU General Public License
25  * along with this program; if not, see the file COPYING, or write
26  * to the Free Software Foundation, Inc.,
27  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
28  */
29
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/init.h>
33 #include <linux/proc_fs.h>
34
35 #include <asm/current.h>
36 #include <asm/uaccess.h>
37 #include <asm/system.h>
38
39 #include <asm/cplb.h>
40 #include <asm/blackfin.h>
41
42 #define CPLB_I 1
43 #define CPLB_D 2
44
45 #define SYNC_SYS    SSYNC()
46 #define SYNC_CORE   CSYNC()
47
48 #define CPLB_BIT_PAGESIZE 0x30000
49
50 static int page_size_table[4] = {
51         0x00000400,             /* 1K */
52         0x00001000,             /* 4K */
53         0x00100000,             /* 1M */
54         0x00400000              /* 4M */
55 };
56
57 static char page_size_string_table[][4] = { "1K", "4K", "1M", "4M" };
58
59 static int cplb_find_entry(unsigned long *cplb_addr,
60                            unsigned long *cplb_data, unsigned long addr,
61                            unsigned long data)
62 {
63         int ii;
64
65         for (ii = 0; ii < 16; ii++)
66                 if (addr >= cplb_addr[ii] && addr < cplb_addr[ii] +
67                     page_size_table[(cplb_data[ii] & CPLB_BIT_PAGESIZE) >> 16]
68                         && (cplb_data[ii] == data))
69                         return ii;
70
71         return -1;
72 }
73
74 static char *cplb_print_entry(char *buf, int type)
75 {
76         unsigned long *p_addr = dpdt_table;
77         unsigned long *p_data = dpdt_table + 1;
78         unsigned long *p_icount = dpdt_swapcount_table;
79         unsigned long *p_ocount = dpdt_swapcount_table + 1;
80         unsigned long *cplb_addr = (unsigned long *)DCPLB_ADDR0;
81         unsigned long *cplb_data = (unsigned long *)DCPLB_DATA0;
82         int entry = 0, used_cplb = 0;
83
84         if (type == CPLB_I) {
85                 buf += sprintf(buf, "Instruction CPLB entry:\n");
86                 p_addr = ipdt_table;
87                 p_data = ipdt_table + 1;
88                 p_icount = ipdt_swapcount_table;
89                 p_ocount = ipdt_swapcount_table + 1;
90                 cplb_addr = (unsigned long *)ICPLB_ADDR0;
91                 cplb_data = (unsigned long *)ICPLB_DATA0;
92         } else
93                 buf += sprintf(buf, "Data CPLB entry:\n");
94
95         buf += sprintf(buf, "Address\t\tData\tSize\tValid\tLocked\tSwapin\
96 \tiCount\toCount\n");
97
98         while (*p_addr != 0xffffffff) {
99                 entry = cplb_find_entry(cplb_addr, cplb_data, *p_addr, *p_data);
100                 if (entry >= 0)
101                         used_cplb |= 1 << entry;
102
103                 buf +=
104                     sprintf(buf,
105                             "0x%08lx\t0x%05lx\t%s\t%c\t%c\t%2d\t%ld\t%ld\n",
106                             *p_addr, *p_data,
107                             page_size_string_table[(*p_data & 0x30000) >> 16],
108                             (*p_data & CPLB_VALID) ? 'Y' : 'N',
109                             (*p_data & CPLB_LOCK) ? 'Y' : 'N', entry, *p_icount,
110                             *p_ocount);
111
112                 p_addr += 2;
113                 p_data += 2;
114                 p_icount += 2;
115                 p_ocount += 2;
116         }
117
118         if (used_cplb != 0xffff) {
119                 buf += sprintf(buf, "Unused/mismatched CPLBs:\n");
120
121                 for (entry = 0; entry < 16; entry++)
122                         if (0 == ((1 << entry) & used_cplb)) {
123                                 int flags = cplb_data[entry];
124                                 buf +=
125                                     sprintf(buf,
126                                             "%2d: 0x%08lx\t0x%05x\t%s\t%c\t%c\n",
127                                             entry, cplb_addr[entry], flags,
128                                             page_size_string_table[(flags &
129                                                                     0x30000) >>
130                                                                    16],
131                                             (flags & CPLB_VALID) ? 'Y' : 'N',
132                                             (flags & CPLB_LOCK) ? 'Y' : 'N');
133                         }
134         }
135
136         buf += sprintf(buf, "\n");
137
138         return buf;
139 }
140
141 static int cplbinfo_proc_output(char *buf)
142 {
143         char *p;
144
145         p = buf;
146
147         p += sprintf(p,
148                      "------------------ CPLB Information ------------------\n\n");
149
150         if (bfin_read_IMEM_CONTROL() & ENICPLB)
151                 p = cplb_print_entry(p, CPLB_I);
152         else
153                 p += sprintf(p, "Instruction CPLB is disabled.\n\n");
154
155         if (bfin_read_DMEM_CONTROL() & ENDCPLB)
156                 p = cplb_print_entry(p, CPLB_D);
157         else
158                 p += sprintf(p, "Data CPLB is disabled.\n");
159
160         return p - buf;
161 }
162
163 static int cplbinfo_read_proc(char *page, char **start, off_t off,
164                               int count, int *eof, void *data)
165 {
166         int len;
167
168         len = cplbinfo_proc_output(page);
169         if (len <= off + count)
170                 *eof = 1;
171         *start = page + off;
172         len -= off;
173         if (len > count)
174                 len = count;
175         if (len < 0)
176                 len = 0;
177         return len;
178 }
179
180 static int cplbinfo_write_proc(struct file *file, const char __user *buffer,
181                                unsigned long count, void *data)
182 {
183         printk(KERN_INFO "Reset the CPLB swap in/out counts.\n");
184         memset(ipdt_swapcount_table, 0, MAX_SWITCH_I_CPLBS * sizeof(unsigned long));
185         memset(dpdt_swapcount_table, 0, MAX_SWITCH_D_CPLBS * sizeof(unsigned long));
186
187         return count;
188 }
189
190 static int __init cplbinfo_init(void)
191 {
192         struct proc_dir_entry *entry;
193
194         if ((entry = create_proc_entry("cplbinfo", 0, NULL)) == NULL) {
195                 return -ENOMEM;
196         }
197
198         entry->read_proc = cplbinfo_read_proc;
199         entry->write_proc = cplbinfo_write_proc;
200         entry->data = NULL;
201
202         return 0;
203 }
204
205 static void __exit cplbinfo_exit(void)
206 {
207         remove_proc_entry("cplbinfo", NULL);
208 }
209
210 module_init(cplbinfo_init);
211 module_exit(cplbinfo_exit);