A few debug-type commands used to dump the raw icache/dcache data. Useful when trying to track down cache-related bugs. Signed-off-by: Mike Frysinger <vapier@gentoo.org>master
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/*
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* U-boot - cmd_cache_dump.c |
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* |
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* Copyright (c) 2007-2008 Analog Devices Inc. |
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* |
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* Licensed under the GPL-2 or later. |
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*/ |
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#include <config.h> |
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#include <common.h> |
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#include <command.h> |
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#include <asm/blackfin.h> |
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#include <asm/mach-common/bits/mpu.h> |
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static int check_limit(const char *type, size_t start_limit, size_t end_limit, size_t start, size_t end) |
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{ |
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if (start >= start_limit && start <= end_limit && \
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end <= end_limit && end >= start_limit && \
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start <= end) |
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return 0; |
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printf("%s limit violation: %zu <= (user:%zu) <= (user:%zu) <= %zu\n", |
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type, start_limit, start, end, end_limit); |
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return 1; |
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} |
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int do_icache_dump(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) |
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{ |
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int cache_status = icache_status(); |
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if (cache_status) |
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icache_disable(); |
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uint32_t cmd_base, tag, cache_upper, cache_lower; |
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size_t way, way_start = 0, way_end = 3; |
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size_t sbnk, sbnk_start = 0, sbnk_end = 3; |
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size_t set, set_start = 0, set_end = 31; |
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size_t dw; |
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if (argc > 1) { |
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way_start = way_end = simple_strtoul(argv[1], NULL, 10); |
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if (argc > 2) { |
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sbnk_start = sbnk_end = simple_strtoul(argv[2], NULL, 10); |
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if (argc > 3) |
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set_start = set_end = simple_strtoul(argv[3], NULL, 10); |
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} |
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} |
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if (check_limit("way", 0, 3, way_start, way_end) || \
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check_limit("subbank", 0, 3, sbnk_start, sbnk_end) || \
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check_limit("set", 0, 31, set_start, set_end)) |
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return 1; |
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puts("Way:Subbank:Set: [valid-tag lower upper] {invalid-tag lower upper}...\n"); |
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for (way = way_start; way <= way_end; ++way) { |
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for (sbnk = sbnk_start; sbnk <= sbnk_end; ++sbnk) { |
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for (set = set_start; set <= set_end; ++set) { |
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printf("%zu:%zu:%2zu: ", way, sbnk, set); |
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for (dw = 0; dw < 4; ++dw) { |
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if (ctrlc()) |
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return 1; |
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cmd_base = \
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(way << 26) | \
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(sbnk << 16) | \
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(set << 5) | \
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(dw << 3); |
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/* first read the tag */ |
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bfin_write_ITEST_COMMAND(cmd_base | 0x0); |
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SSYNC(); |
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tag = bfin_read_ITEST_DATA0(); |
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printf("%c%08x ", (tag & 0x1 ? ' ' : '{'), tag); |
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/* grab the data at this loc */ |
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bfin_write_ITEST_COMMAND(cmd_base | 0x4); |
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SSYNC(); |
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cache_lower = bfin_read_ITEST_DATA0(); |
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cache_upper = bfin_read_ITEST_DATA1(); |
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printf("%08x %08x%c ", cache_lower, cache_upper, (tag & 0x1 ? ' ' : '}')); |
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} |
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puts("\n"); |
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} |
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} |
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} |
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if (cache_status) |
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icache_enable(); |
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return 0; |
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} |
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U_BOOT_CMD(icache_dump, 4, 0, do_icache_dump, |
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"icache_dump - dump current instruction cache\n", |
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"[way] [subbank] [set]"); |
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int do_dcache_dump(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) |
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{ |
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u32 way, bank, subbank, set; |
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u32 status, addr; |
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u32 dmem_ctl = bfin_read_DMEM_CONTROL(); |
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for (bank = 0; bank < 2; ++bank) { |
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if (!(dmem_ctl & (1 << (DMC1_P - bank)))) |
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continue; |
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for (way = 0; way < 2; ++way) |
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for (subbank = 0; subbank < 4; ++subbank) { |
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printf("%i:%i:%i:\t", bank, way, subbank); |
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for (set = 0; set < 64; ++set) { |
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if (ctrlc()) |
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return 1; |
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/* retrieve a cache tag */ |
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bfin_write_DTEST_COMMAND( |
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way << 26 | |
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bank << 23 | |
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subbank << 16 | |
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set << 5 |
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); |
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CSYNC(); |
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status = bfin_read_DTEST_DATA0(); |
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/* construct the address using the tag */ |
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addr = (status & 0xFFFFC800) | (subbank << 12) | (set << 5); |
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/* show it */ |
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if (set && !(set % 4)) |
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puts("\n\t"); |
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printf("%c%08x%c%08x%c ", (status & 0x1 ? '[' : '{'), status, (status & 0x2 ? 'd' : ' '), addr, (status & 0x1 ? ']' : '}')); |
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} |
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puts("\n"); |
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} |
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} |
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return 0; |
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} |
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U_BOOT_CMD(dcache_dump, 4, 0, do_dcache_dump, |
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"dcache_dump - dump current data cache\n", |
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"[bank] [way] [subbank] [set]"); |
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