arch/blackfin/lib/cmd_cache_dump.c

   1 /*
   2  * U-boot - cmd_cache_dump.c
   3  *
   4  * Copyright (c) 2007-2008 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2 or later.
   7  */
   8
   9 #include <config.h>
  10 #include <common.h>
  11 #include <command.h>
  12
  13 #include <asm/blackfin.h>
  14 #include <asm/mach-common/bits/mpu.h>
  15
  16 static int check_limit(const char *type, size_t start_limit, size_t end_limit, size_t start, size_t end)
  17 {
  18         if (start >= start_limit && start <= end_limit && \
  19             end <= end_limit && end >= start_limit && \
  20             start <= end)
  21                 return 0;
  22
  23         printf("%s limit violation: %zu <= (user:%zu) <= (user:%zu) <= %zu\n",
  24                 type, start_limit, start, end, end_limit);
  25         return 1;
  26 }
  27
  28 int do_icache_dump(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  29 {
  30         int cache_status = icache_status();
  31
  32         if (cache_status)
  33                 icache_disable();
  34
  35         uint32_t cmd_base, tag, cache_upper, cache_lower;
  36
  37         size_t way, way_start = 0, way_end = 3;
  38         size_t sbnk, sbnk_start = 0, sbnk_end = 3;
  39         size_t set, set_start = 0, set_end = 31;
  40         size_t dw;
  41
  42         if (argc > 1) {
  43                 way_start = way_end = simple_strtoul(argv[1], NULL, 10);
  44                 if (argc > 2) {
  45                         sbnk_start = sbnk_end = simple_strtoul(argv[2], NULL, 10);
  46                         if (argc > 3)
  47                                 set_start = set_end = simple_strtoul(argv[3], NULL, 10);
  48                 }
  49         }
  50
  51         if (check_limit("way", 0, 3, way_start, way_end) || \
  52             check_limit("subbank", 0, 3, sbnk_start, sbnk_end) || \
  53             check_limit("set", 0, 31, set_start, set_end))
  54                 return 1;
  55
  56         puts("Way:Subbank:Set: [valid-tag lower upper] {invalid-tag lower upper}...\n");
  57
  58         for (way = way_start; way <= way_end; ++way) {
  59                 for (sbnk = sbnk_start; sbnk <= sbnk_end; ++sbnk) {
  60                         for (set = set_start; set <= set_end; ++set) {
  61                                 printf("%zu:%zu:%2zu: ", way, sbnk, set);
  62                                 for (dw = 0; dw < 4; ++dw) {
  63                                         if (ctrlc())
  64                                                 return 1;
  65
  66                                         cmd_base = \
  67                                                 (way  << 26) | \
  68                                                 (sbnk << 16) | \
  69                                                 (set  <<  5) | \
  70                                                 (dw   <<  3);
  71
  72                                         /* first read the tag */
  73                                         bfin_write_ITEST_COMMAND(cmd_base | 0x0);
  74                                         SSYNC();
  75                                         tag = bfin_read_ITEST_DATA0();
  76                                         printf("%c%08x ", (tag & 0x1 ? ' ' : '{'), tag);
  77
  78                                         /* grab the data at this loc */
  79                                         bfin_write_ITEST_COMMAND(cmd_base | 0x4);
  80                                         SSYNC();
  81                                         cache_lower = bfin_read_ITEST_DATA0();
  82                                         cache_upper = bfin_read_ITEST_DATA1();
  83                                         printf("%08x %08x%c ", cache_lower, cache_upper, (tag & 0x1 ? ' ' : '}'));
  84                                 }
  85                                 puts("\n");
  86                         }
  87                 }
  88         }
  89
  90         if (cache_status)
  91                 icache_enable();
  92
  93         return 0;
  94 }
  95
  96 U_BOOT_CMD(icache_dump, 4, 0, do_icache_dump,
  97         "icache_dump - dump current instruction cache\n",
  98         "[way] [subbank] [set]");
  99
 100 int do_dcache_dump(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 101 {
 102         u32 way, bank, subbank, set;
 103         u32 status, addr;
 104         u32 dmem_ctl = bfin_read_DMEM_CONTROL();
 105
 106         for (bank = 0; bank < 2; ++bank) {
 107                 if (!(dmem_ctl & (1 << (DMC1_P - bank))))
 108                         continue;
 109
 110                 for (way = 0; way < 2; ++way)
 111                         for (subbank = 0; subbank < 4; ++subbank) {
 112                                 printf("%i:%i:%i:\t", bank, way, subbank);
 113                                 for (set = 0; set < 64; ++set) {
 114
 115                                         if (ctrlc())
 116                                                 return 1;
 117
 118                                         /* retrieve a cache tag */
 119                                         bfin_write_DTEST_COMMAND(
 120                                                 way << 26 |
 121                                                 bank << 23 |
 122                                                 subbank << 16 |
 123                                                 set << 5
 124                                         );
 125                                         CSYNC();
 126                                         status = bfin_read_DTEST_DATA0();
 127
 128                                         /* construct the address using the tag */
 129                                         addr = (status & 0xFFFFC800) | (subbank << 12) | (set << 5);
 130
 131                                         /* show it */
 132                                         if (set && !(set % 4))
 133                                                 puts("\n\t");
 134                                         printf("%c%08x%c%08x%c ", (status & 0x1 ? '[' : '{'), status, (status & 0x2 ? 'd' : ' '), addr, (status & 0x1 ? ']' : '}'));
 135                                 }
 136                                 puts("\n");
 137                         }
 138         }
 139
 140         return 0;
 141 }
 142
 143 U_BOOT_CMD(dcache_dump, 4, 0, do_dcache_dump,
 144         "dcache_dump - dump current data cache\n",
 145         "[bank] [way] [subbank] [set]");