diff options
Diffstat (limited to 'arch/blackfin/mach-common/cplbinfo.c')
| -rw-r--r-- | arch/blackfin/mach-common/cplbinfo.c | 211 |
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); |