/* * add_header.c - partially based on OpenWrt's motorola-bin.c * * Copyright (C) 2008 Imre Kaloz * Gabor Juhos * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License, * version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* * The add_header utility used by various vendors preprends the buf * image with a header containing a CRC32 value which is generated for the * model id + reserved space for CRC32 + buf, then replaces the reserved * area with the actual CRC32. This replacement tool mimics this behavior. */ #include #include #include #include #include #include #include #include #include #include #define BPB 8 /* bits/byte */ static uint32_t crc32[1<> 1)) : (crc >> 1); crc32[n] = crc; } } static uint32_t crc32buf(unsigned char *buf, size_t len) { uint32_t crc = 0xFFFFFFFF; for (; len; len--, buf++) crc = crc32[(uint8_t)crc ^ *buf] ^ (crc >> BPB); return ~crc; } struct header { unsigned char model[16]; uint32_t crc; }; static void usage(const char *) __attribute__ (( __noreturn__ )); static void usage(const char *mess) { fprintf(stderr, "Error: %s\n", mess); fprintf(stderr, "Usage: add_header model_id input_file output_file\n"); fprintf(stderr, "\n"); exit(1); } int main(int argc, char **argv) { off_t len; // of original buf off_t buflen; // of the output file int fd; void *input_file; // pointer to the input file (mmmapped) struct header header; unsigned char *buf; // pointer to prefix + copy of original buf // verify parameters if (argc != 4) usage("wrong number of arguments"); // mmap input_file if ((fd = open(argv[2], O_RDONLY)) < 0 || (len = lseek(fd, 0, SEEK_END)) < 0 || (input_file = mmap(0, len, PROT_READ, MAP_SHARED, fd, 0)) == (void *) (-1) || close(fd) < 0) { fprintf(stderr, "Error loading file %s: %s\n", argv[2], strerror(errno)); exit(1); } buflen = len + sizeof(header); init_crc32(); // copy model name into header strncpy(header.model, argv[1], sizeof(header.model)); header.crc = 0; // create a firmware image in memory and copy the input_file to it buf = malloc(buflen); memcpy(buf, &header, sizeof(header)); memcpy(&buf[sizeof(header)], input_file, len); // CRC of temporary header + buf header.crc = htonl(crc32buf(buf, buflen)); memcpy(buf, &header, sizeof(header)); // write the buf if ((fd = open(argv[3], O_CREAT|O_WRONLY|O_TRUNC,0644)) < 0 || write(fd, buf, buflen) != buflen || close(fd) < 0) { fprintf(stderr, "Error storing file %s: %s\n", argv[3], strerror(errno)); exit(2); } free(buf); munmap(input_file,len); return 0; } '#n3'>3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61

module \$__mul_wrapper (A, B, Y);

parameter A_SIGNED = 0;
parameter B_SIGNED = 0;
parameter A_WIDTH = 1;
parameter B_WIDTH = 1;
parameter Y_WIDTH = 1;

input [17:0] A;
input [24:0] B;
output [47:0] Y;

wire [A_WIDTH-1:0] A_ORIG = A;
wire [B_WIDTH-1:0] B_ORIG = B;
wire [Y_WIDTH-1:0] Y_ORIG;
assign Y = Y_ORIG;

\$mul #(
	.A_SIGNED(A_SIGNED),
	.B_SIGNED(B_SIGNED),
	.A_WIDTH(A_WIDTH),
	.B_WIDTH(B_WIDTH),
	.Y_WIDTH(Y_WIDTH)
) _TECHMAP_REPLACE_ (
	.A(A_ORIG),
	.B(B_ORIG),
	.Y(Y_ORIG)
);

endmodule

module \$__add_wrapper (A, B, Y);

parameter A_SIGNED = 0;
parameter B_SIGNED = 0;
parameter A_WIDTH = 1;
parameter B_WIDTH = 1;
parameter Y_WIDTH = 1;

input [47:0] A;
input [47:0] B;
output [47:0] Y;

wire [A_WIDTH-1:0] A_ORIG = A;
wire [B_WIDTH-1:0] B_ORIG = B;
wire [Y_WIDTH-1:0] Y_ORIG;
assign Y = Y_ORIG;

\$add #(
	.A_SIGNED(A_SIGNED),
	.B_SIGNED(B_SIGNED),
	.A_WIDTH(A_WIDTH),
	.B_WIDTH(B_WIDTH),
	.Y_WIDTH(Y_WIDTH)
) _TECHMAP_REPLACE_ (
	.A(A_ORIG),
	.B(B_ORIG),
	.Y(Y_ORIG)
);

endmodule