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-rw-r--r--lib/gen_crc64table.c95
1 files changed, 0 insertions, 95 deletions
diff --git a/lib/gen_crc64table.c b/lib/gen_crc64table.c
deleted file mode 100644
index e05a4230a0a0..000000000000
--- a/lib/gen_crc64table.c
+++ /dev/null
@@ -1,95 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Generate lookup table for the table-driven CRC64 calculation.
- *
- * gen_crc64table is executed in kernel build time and generates
- * lib/crc64table.h. This header is included by lib/crc64.c for
- * the table-driven CRC64 calculation.
- *
- * See lib/crc64.c for more information about which specification
- * and polynomial arithmetic that gen_crc64table.c follows to
- * generate the lookup table.
- *
- * Copyright 2018 SUSE Linux.
- * Author: Coly Li <colyli@suse.de>
- */
-#include <inttypes.h>
-#include <stdio.h>
-
-#define CRC64_ECMA182_POLY 0x42F0E1EBA9EA3693ULL
-#define CRC64_NVME_POLY 0x9A6C9329AC4BC9B5ULL
-
-static uint64_t crc64_table[256] = {0};
-static uint64_t crc64_nvme_table[256] = {0};
-
-static void generate_reflected_crc64_table(uint64_t table[256], uint64_t poly)
-{
- uint64_t i, j, c, crc;
-
- for (i = 0; i < 256; i++) {
- crc = 0ULL;
- c = i;
-
- for (j = 0; j < 8; j++) {
- if ((crc ^ (c >> j)) & 1)
- crc = (crc >> 1) ^ poly;
- else
- crc >>= 1;
- }
- table[i] = crc;
- }
-}
-
-static void generate_crc64_table(uint64_t table[256], uint64_t poly)
-{
- uint64_t i, j, c, crc;
-
- for (i = 0; i < 256; i++) {
- crc = 0;
- c = i << 56;
-
- for (j = 0; j < 8; j++) {
- if ((crc ^ c) & 0x8000000000000000ULL)
- crc = (crc << 1) ^ poly;
- else
- crc <<= 1;
- c <<= 1;
- }
-
- table[i] = crc;
- }
-}
-
-static void output_table(uint64_t table[256])
-{
- int i;
-
- for (i = 0; i < 256; i++) {
- printf("\t0x%016" PRIx64 "ULL", table[i]);
- if (i & 0x1)
- printf(",\n");
- else
- printf(", ");
- }
- printf("};\n");
-}
-
-static void print_crc64_tables(void)
-{
- printf("/* this file is generated - do not edit */\n\n");
- printf("#include <linux/types.h>\n");
- printf("#include <linux/cache.h>\n\n");
- printf("static const u64 ____cacheline_aligned crc64table[256] = {\n");
- output_table(crc64_table);
-
- printf("\nstatic const u64 ____cacheline_aligned crc64nvmetable[256] = {\n");
- output_table(crc64_nvme_table);
-}
-
-int main(int argc, char *argv[])
-{
- generate_crc64_table(crc64_table, CRC64_ECMA182_POLY);
- generate_reflected_crc64_table(crc64_nvme_table, CRC64_NVME_POLY);
- print_crc64_tables();
- return 0;
-}