各种软核处理器二进制文件FPGA初始化文件生成程序

　　不管是MIPS, Nios II, MicroBlaze, MSP430, 8051, OpenRISC, OpenSPARC, LEON2/LEON3等等软核处理器，在FPGA上实现的时候我们通常需要一部分片上RAM存储bootloader，可以使用gcc的objcopy把bootloader的text, exception vector, rodata, data or bss等你需要的内容copy出来，可以通过-O binary生成二进制文件，可以通过-j .section提取你要的section，当然也可以通过--gap-fill 0x00 参数指定默认各sections之间空白填充的数据。通过以下C程序可以生成符合Altera、Xilinx和Verilog中$readmemh调用的内存初始化数据。可以根据不同的处理器架构的大小端模式对以下代码稍作修改。

/*
*  This program is free software: you can redistribute it and/or modify
*  it under the terms of the GNU General Public License as published by
*  the Free Software Foundation, either version 3 of the License, or
*  (at your option) any later version.
*
*  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, see <http://www.gnu.org/licenses/>.
*
*    copyright @ Lyu Yang ----------------------------2015-10-02
*/

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char** argv)
{
int i, j, FileLen = 0, address = 0, maxaddr;
FILE * FileIn, * FileOut;

if (argc != 3) {
printf("Arguments Error!\n");
printf("\nUsage: bin2fpga.exe Depth InputFile\n");
return 0;
}
else {

FileIn = fopen(*(argv + 2), "rb");
if (FileIn == NULL){
printf("File does not exist!\n");
return 0;
}

fseek(FileIn, 0L, SEEK_END);
FileLen = ftell(FileIn);
printf("\nInput File length is %d Bytes.\n", FileLen);
maxaddr = atoi(*(argv + 1));

unsigned char * buf = (unsigned char*)malloc(sizeof(char)* FileLen);
if(buf == NULL) {
printf("Memory Allocate Error!\n");
return 0;
}

// For altera fpga mif file
FileOut = fopen("./altera.mif", "w");

if (FileOut == NULL) {
printf("Output File Create Error!\n");
return 0;
}

fprintf(FileOut, "DEPTH = %d;\nWIDTH = 32;\nADDRESS_RADIX = DEC;\nDATA_RADIX = HEX;\nCONTENT\nBEGIN\n", maxaddr);

fseek(FileIn, 0L, SEEK_SET);
fread(buf, FileLen, 1, FileIn);

for (i = 0; i < FileLen; i += 4) {
fprintf(FileOut, "%d: ", address);

fprintf(FileOut, "%02x", buf[i + 3]);
fprintf(FileOut, "%02x", buf[i + 2]);
fprintf(FileOut, "%02x", buf[i + 1]);
fprintf(FileOut, "%02x", buf[i + 0]);

fprintf(FileOut, ";\n");
address++;
}

fprintf(FileOut, "[%d..%d]: 0;\n", address, maxaddr - 1);

fprintf(FileOut, "\n\nEND;\n");

fclose(FileOut);

// For xilinx fpga coe file
FileOut = fopen("./xilinx.coe", "w");

if (FileOut == NULL) {
printf("Output File Create Error!\n");
return 0;
}

fprintf(FileOut, "MEMORY_INITIALIZATION_RADIX=16;\nMEMORY_INITIALIZATION_VECTOR=\n", maxaddr);

fseek(FileIn, 0L, SEEK_SET);
fread(buf, FileLen, 1, FileIn);

for (i = 0; i < FileLen; i += 4) {
fprintf(FileOut, "%02x", buf[i + 3]);
fprintf(FileOut, "%02x", buf[i + 2]);
fprintf(FileOut, "%02x", buf[i + 1]);
fprintf(FileOut, "%02x", buf[i + 0]);

fprintf(FileOut, ",\n");
}

fseek(FileOut, -2L, SEEK_END);
fprintf(FileOut, ";\n");

fclose(FileOut);

// generic data file
FileOut = fopen("./data.txt", "w");

if (FileOut == NULL) {
printf("Output File Create Error!\n");
return 0;
}

address = 0x0;
fseek(FileIn, 0L, SEEK_SET);
fread(buf, FileLen, 1, FileIn);

for (i = 0; i < FileLen; i += 4) {
fprintf(FileOut, "@%08x\n", address);

fprintf(FileOut, "%02x", buf[i + 3]);
fprintf(FileOut, "%02x", buf[i + 2]);
fprintf(FileOut, "%02x", buf[i + 1]);
fprintf(FileOut, "%02x", buf[i + 0]);

fprintf(FileOut, "\n");
address++;
}

free(buf);
fclose(FileIn);
fclose(FileOut);
}

return 0;
}