modify added
git-svn-id: svn://svn.openwrt.org/openwrt/packages@10344 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
ralph
parent
00ea0a2f46
commit
4c064a15e2
@ -1,9 +1,11 @@
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/*
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* Simple app. to do memory accesses via /dev/mem.
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*
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* $Id: io.c,v 1.5 2000/08/21 09:01:57 richard Exp $
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* $Id: io.c,v 2.0 $
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*
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* Copyright (c) Richard Hirst <rhirst@linuxcare.com>
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* Copyright (c) Thomas Langer <thomas.langer@infineon.com>
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*
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*/
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#include <stdio.h>
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@ -16,24 +18,23 @@
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#include <fcntl.h>
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#include <errno.h>
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#ifndef FALSE
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#define FALSE 0
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#define TRUE (!FALSE)
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#endif
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static char *argv0;
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#define MEM_READ 0
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#define MEM_WRITE 1
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#define MEM_AND 2
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#define MEM_OR 3
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static void
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usage (void)
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usage (char *argv0)
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{
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fprintf(stderr,
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"Raw memory i/o utility - $Revision: 1.5 $\n\n"
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"%s -v -1|2|4 -r|w [-l <len>] [-f <file>] <addr> [<value>]\n\n"
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"Raw memory i/o utility - $Revision: 2.0 $\n\n"
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"%s -v -1|2|4 -r|w|a|o [-l <len>] [-f <file>] <addr> [<value>]\n\n"
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" -v Verbose, asks for confirmation\n"
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" -1|2|4 Sets memory access size in bytes (default byte)\n"
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" -l <len> Length in bytes of area to access (defaults to\n"
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" one access, or whole file length)\n"
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" -r|w Read from or Write to memory (default read)\n"
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" -r|w|a|o Read from or Write to memory (default read)\n"
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" optional write with modify (and/or)\n"
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" -f <file> File to write on memory read, or\n"
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" to read on memory write\n"
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" <addr> The memory address to access\n"
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@ -110,6 +111,64 @@ write_memory(unsigned long phys_addr, void *addr, int len, int iosize, unsigned
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}
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static void
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and_write_memory(unsigned long phys_addr, void *addr, int len, int iosize, unsigned long value)
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{
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switch(iosize) {
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case 1:
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while (len) {
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*(unsigned char *)addr &= value;
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len -= iosize;
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addr += iosize;
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}
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break;
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case 2:
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while (len) {
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*(unsigned short *)addr &= value;
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len -= iosize;
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addr += iosize;
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}
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break;
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case 4:
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while (len) {
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*(unsigned long *)addr &= value;
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len -= iosize;
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addr += iosize;
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}
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break;
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}
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}
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static void
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or_write_memory(unsigned long phys_addr, void *addr, int len, int iosize, unsigned long value)
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{
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switch(iosize) {
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case 1:
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while (len) {
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*(unsigned char *)addr |= value;
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len -= iosize;
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addr += iosize;
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}
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break;
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case 2:
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while (len) {
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*(unsigned short *)addr |= value;
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len -= iosize;
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addr += iosize;
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}
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break;
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case 4:
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while (len) {
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*(unsigned long *)addr |= value;
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len -= iosize;
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addr += iosize;
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}
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break;
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}
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}
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int
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main (int argc, char **argv)
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{
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@ -117,20 +176,19 @@ main (int argc, char **argv)
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void *real_io;
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unsigned long real_len, real_addr, req_addr, req_value = 0, offset;
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char *endptr;
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int memread = TRUE;
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int memfunc = MEM_READ;
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int iosize = 1;
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char *filename = NULL;
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int verbose = 0;
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argv0 = argv[0];
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opterr = 0;
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if (argc == 1)
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usage();
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usage(argv[0]);
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while ((opt = getopt(argc, argv, "hv124rwl:f:")) > 0) {
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while ((opt = getopt(argc, argv, "hv124rwaol:f:")) > 0) {
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switch (opt) {
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case 'h':
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usage();
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usage(argv[0]);
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case 'v':
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verbose = 1;
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break;
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@ -140,10 +198,16 @@ main (int argc, char **argv)
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iosize = opt - '0';
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break;
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case 'r':
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memread = TRUE;
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memfunc = MEM_READ;
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break;
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case 'a':
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memfunc = MEM_AND;
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break;
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case 'o':
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memfunc = MEM_OR;
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break;
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case 'w':
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memread = FALSE;
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memfunc = MEM_WRITE;
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break;
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case 'l':
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req_len = strtoul(optarg, &endptr, 0);
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@ -157,7 +221,7 @@ main (int argc, char **argv)
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break;
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default:
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fprintf(stderr, "Unknown option: %c\n", opt);
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usage();
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usage(argv[0]);
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}
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}
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@ -171,17 +235,18 @@ main (int argc, char **argv)
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exit(1);
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}
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optind++;
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if (!filename && optind < argc)
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memread = FALSE;
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if (!filename && (memfunc == MEM_READ) && optind < argc) {
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memfunc = MEM_WRITE;
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}
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if (filename && optind > argc) {
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fprintf(stderr, "Filename AND value given\n");
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exit(1);
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}
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if (!filename && !memread && optind == argc) {
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if (!filename && (memfunc != MEM_READ) && optind == argc) {
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fprintf(stderr, "No value given for WRITE\n");
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exit(1);
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}
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if (!filename && !memread) {
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if (!filename && (memfunc != MEM_READ)) {
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req_value = strtoul(argv[optind], &endptr, 0);
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if (*endptr) {
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fprintf(stderr, "Bad <value> value '%s'\n", argv[optind]);
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@ -194,7 +259,7 @@ main (int argc, char **argv)
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}
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optind++;
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}
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if (filename && memread && !req_len) {
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if (filename && (memfunc == MEM_READ) && !req_len) {
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fprintf(stderr, "No size given for file memread\n");
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exit(1);
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}
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@ -202,14 +267,14 @@ main (int argc, char **argv)
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fprintf(stderr, "Too many arguments '%s'...\n", argv[optind]);
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exit(1);
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}
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if (filename && memread) {
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if (filename && (memfunc == MEM_READ)) {
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ffd = open(filename, O_WRONLY|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
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if (ffd < 0) {
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fprintf(stderr, "Failed to open destination file '%s': %s\n", filename, strerror(errno));
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exit(1);
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}
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}
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if (filename && !memread) {
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if (filename && (memfunc != MEM_READ)) {
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ffd = open(filename, O_RDONLY);
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if (ffd < 0) {
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fprintf(stderr, "Failed to open source file '%s': %s\n", filename, strerror(errno));
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@ -243,19 +308,19 @@ main (int argc, char **argv)
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fprintf(stderr, "Badly aligned <size> for access size\n");
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exit(1);
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}
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if (!verbose)
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/* Nothing */;
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else if (filename && memread)
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printf("Request to memread 0x%x bytes from address 0x%08lx\n"
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else if (filename && (memfunc == MEM_READ))
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printf("Request to read 0x%x bytes from address 0x%08lx\n"
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"\tto file %s, using %d byte accesses\n",
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req_len, req_addr, filename, iosize);
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else if (filename)
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printf("Request to write 0x%x bytes to address 0x%08lx\n"
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"\tfrom file %s, using %d byte accesses\n",
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req_len, req_addr, filename, iosize);
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else if (memread)
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printf("Request to memread 0x%x bytes from address 0x%08lx\n"
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else if (memfunc == MEM_READ)
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printf("Request to read 0x%x bytes from address 0x%08lx\n"
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"\tusing %d byte accesses\n",
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req_len, req_addr, iosize);
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else
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@ -279,7 +344,7 @@ main (int argc, char **argv)
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printf("Attempting to map 0x%lx bytes at address 0x%08lx\n",
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real_len, real_addr);
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mfd = open("/dev/mem", memread ? O_RDONLY : O_RDWR);
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mfd = open("/dev/mem", (memfunc == MEM_READ) ? O_RDONLY : O_RDWR);
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if (mfd == -1) {
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perror("open /dev/mem");
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exit(1);
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@ -287,7 +352,7 @@ main (int argc, char **argv)
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if (verbose)
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printf("open(/dev/mem) ok\n");
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real_io = mmap(NULL, real_len,
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memread ? PROT_READ:PROT_WRITE,
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(memfunc == MEM_READ) ? PROT_READ:PROT_READ|PROT_WRITE,
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MAP_SHARED, mfd, real_addr);
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if (real_io == (void *)(-1)) {
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fprintf(stderr, "mmap() failed: %s\n", strerror(errno));
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@ -308,7 +373,7 @@ main (int argc, char **argv)
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}
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}
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if (filename && memread) {
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if (filename && (memfunc == MEM_READ)) {
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int n = write(ffd, real_io + offset, req_len);
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if (n < 0) {
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@ -334,10 +399,23 @@ main (int argc, char **argv)
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exit(1);
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}
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}
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else if (memread)
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memread_memory(req_addr, real_io + offset, req_len, iosize);
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else
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write_memory(req_addr, real_io + offset, req_len, iosize, req_value);
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else {
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switch (memfunc)
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{
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case MEM_READ:
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memread_memory(req_addr, real_io + offset, req_len, iosize);
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break;
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case MEM_WRITE:
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write_memory(req_addr, real_io + offset, req_len, iosize, req_value);
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break;
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case MEM_AND:
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and_write_memory(req_addr, real_io + offset, req_len, iosize, req_value);
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break;
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case MEM_OR:
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or_write_memory(req_addr, real_io + offset, req_len, iosize, req_value);
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break;
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}
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}
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if (filename)
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close(ffd);
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