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author | Mike Frysinger <vapier.adi@gmail.com> | 2008-11-18 10:48:22 +0100 |
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committer | Bryan Wu <cooloney@kernel.org> | 2008-11-18 10:48:22 +0100 |
commit | ff4c02e4be00dccfb4b7baa8e56300b6ab3e290a (patch) | |
tree | 75093ea97d661d59f5b7e882f05cb99dbad8fae7 /arch/blackfin/kernel/cplbinfo.c | |
parent | Blackfin arch: define BASE_BAUD like everyone else (diff) | |
download | linux-ff4c02e4be00dccfb4b7baa8e56300b6ab3e290a.tar.xz linux-ff4c02e4be00dccfb4b7baa8e56300b6ab3e290a.zip |
Blackfin arch: unify cplbinfo files
Merge MPU and noMPU version of CPLB info code to one common version.
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin/kernel/cplbinfo.c')
-rw-r--r-- | arch/blackfin/kernel/cplbinfo.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/cplbinfo.c b/arch/blackfin/kernel/cplbinfo.c new file mode 100644 index 000000000000..dc584fe18e5f --- /dev/null +++ b/arch/blackfin/kernel/cplbinfo.c @@ -0,0 +1,200 @@ +/* + * arch/blackfin/kernel/cplbinfo.c - display CPLB status + * + * Copyright 2004-2008 Analog Devices Inc. + * Licensed under the GPL-2 or later. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/proc_fs.h> +#include <linux/uaccess.h> + +#include <asm/cplbinit.h> +#include <asm/blackfin.h> + +typedef enum { ICPLB, DCPLB } cplb_type; + +static char page_strtbl[][3] = { "1K", "4K", "1M", "4M" }; +#define page(flags) (((flags) & 0x30000) >> 16) +#define strpage(flags) page_strtbl[page(flags)] + +#ifdef CONFIG_MPU + +static char *cplb_print_entry(char *buf, cplb_type type, unsigned int cpu) +{ + struct cplb_entry *tbl; + int switched; + int i; + + if (type == ICPLB) { + tbl = icplb_tbl[cpu]; + switched = first_switched_icplb; + } else { + tbl = dcplb_tbl[cpu]; + switched = first_switched_dcplb; + } + + 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%05lx\t%s\t%c\t%c\t%c\t%c\n", + i, addr, data, strpage(data), + (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; +} + +#else + +static int page_size_table[4] = { + 0x00000400, /* 1K */ + 0x00001000, /* 4K */ + 0x00100000, /* 1M */ + 0x00400000 /* 4M */ +}; + +static int cplb_find_entry(unsigned long *cplb_addr, + unsigned long *cplb_data, unsigned long addr, + unsigned long data) +{ + int i; + + for (i = 0; i < 16; ++i) + if (addr >= cplb_addr[i] && + addr < cplb_addr[i] + page_size_table[page(cplb_data[i])] && + cplb_data[i] == data) + return i; + + return -1; +} + +static char *cplb_print_entry(char *buf, cplb_type type, unsigned int cpu) +{ + unsigned long *p_addr, *p_data, *p_icount, *p_ocount; + unsigned long *cplb_addr, *cplb_data; + int entry = 0, used_cplb = 0; + + if (type == ICPLB) { + p_addr = ipdt_tables[cpu]; + p_data = ipdt_tables[cpu] + 1; + p_icount = ipdt_swapcount_tables[cpu]; + p_ocount = ipdt_swapcount_tables[cpu] + 1; + cplb_addr = (unsigned long *)ICPLB_ADDR0; + cplb_data = (unsigned long *)ICPLB_DATA0; + } else { + p_addr = dpdt_tables[cpu]; + p_data = dpdt_tables[cpu] + 1; + p_icount = dpdt_swapcount_tables[cpu]; + p_ocount = dpdt_swapcount_tables[cpu] + 1; + cplb_addr = (unsigned long *)DCPLB_ADDR0; + cplb_data = (unsigned long *)DCPLB_DATA0; + } + + 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, strpage(*p_data), + (*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, strpage(flags), + (flags & CPLB_VALID) ? 'Y' : 'N', + (flags & CPLB_LOCK) ? 'Y' : 'N'); + } + } + + buf += sprintf(buf, "\n"); + + return buf; +} + +#endif + +static int cplbinfo_proc_output(char *buf, void *data) +{ + unsigned int cpu = (unsigned int)data; + char *p = buf; + + if (bfin_read_IMEM_CONTROL() & ENICPLB) { + p += sprintf(p, "Instruction CPLB entry:\n"); + p = cplb_print_entry(p, ICPLB, cpu); + } else + p += sprintf(p, "Instruction CPLB is disabled.\n\n"); + + if (bfin_read_DMEM_CONTROL() & ENDCPLB) { + p += sprintf(p, "Data CPLB entry:\n"); + p = cplb_print_entry(p, DCPLB, cpu); + } else + p += sprintf(p, "Data CPLB is disabled.\n\n"); + + return p - buf; +} + +static int cplbinfo_read_proc(char *page, char **start, off_t off, + int count, int *eof, void *data) +{ + int len = cplbinfo_proc_output(page, data); + if (len <= off + count) + *eof = 1; + *start = page + off; + len -= off; + return max(min(len, count), 0); +} + +static int __init cplbinfo_init(void) +{ + struct proc_dir_entry *parent, *entry; + unsigned int cpu; + unsigned char str[10]; + + parent = proc_mkdir("cplbinfo", NULL); + if (!parent) + return -ENOMEM; + + for_each_online_cpu(cpu) { + sprintf(str, "cpu%u", cpu); + entry = create_proc_entry(str, 0, parent); + if (!entry) + return -ENOMEM; + + entry->read_proc = cplbinfo_read_proc; + entry->data = (void *)cpu; + } + + return 0; +} +late_initcall(cplbinfo_init); |