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/*
 * eim_peek_poke.c
 * ---------------
 * Read or write a 32-bit word via the EIM bus.  This is mostly
 * intended for use as part of the FPGA initialization sequence.
 *
 * Authors: Paul Selkirk, Rob Austein
 * Copyright (c) 2015, NORDUnet A/S
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * - Redistributions of source code must retain the above copyright notice,
 *   thi
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-30 12:14:25 +0000
span class="cm"> * documentation and/or other materials provided with the distribution. * * - Neither the name of the NORDUnet nor the names of its contributors may * be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <stdio.h> #include <stdlib.h> #include <stdarg.h> #include <string.h> #include "novena-eim.h" #define string_match(...) \ _string_match(__VA_ARGS__, NULL) static int _string_match(const char *s1, ...) { const char *s2; if (s1 == NULL) return 0; va_list ap; va_start(ap, s1); for (s2 = va_arg(ap, const char *); s2 != NULL; s2 = va_arg(ap, const char *)) if (!strcmp(s1, s2)) break; va_end(ap); return s2 != NULL; } static int parse_value(const char *s, uint32_t *value) { if (s == NULL || value == NULL) return 0; char *e; *value = strtoul(s, &e, 0); return *s != '\0' && *e == '\0'; } static int parse_offset(const char *s, off_t *offset) { uint32_t value; if (offset == NULL || !parse_value(s, &value)) return 0; *offset = (off_t) value; return 1; } static void usage(const int code, const char *jane) { FILE *f = code ? stderr : stdout; fprintf(f, "usage: %s { --read offset | --write offset value }\n", jane); exit(code); } int main(int argc, char *argv[]) { off_t offset = 0; uint32_t value; if (argc == 1 || string_match(argv[1], "-?", "-h", "--help")) usage(EXIT_SUCCESS, argv[0]); if (eim_setup() != 0) { fprintf(stderr, "EIM setup failed\n"); return EXIT_FAILURE; } if (string_match(argv[1], "r", "-r", "--read", "--peek")) { if (argc != 3 || !parse_offset(argv[2], &offset)) usage(EXIT_FAILURE, argv[0]); eim_read_32(offset, &value); printf("%08x\n", value); } else if (string_match(argv[1], "w", "-w", "--write", "--poke")) { if (argc != 4 || !parse_offset(argv[2], &offset) || !parse_value(argv[3], &value)) usage(EXIT_FAILURE, argv[0]); eim_write_32(offset, &value); exit(EXIT_SUCCESS); } else { usage(EXIT_FAILURE, argv[0]); } return EXIT_SUCCESS; }