From 4c064a15e2943e9ba6519a7011cd9df14dd343a2 Mon Sep 17 00:00:00 2001 From: ralph Date: Fri, 1 Feb 2008 12:45:55 +0000 Subject: [PATCH 1/1] modify added git-svn-id: svn://svn.openwrt.org/openwrt/packages@10344 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- utils/io/src/io.c | 154 ++++++++++++++++++++++++++++++++++++++++-------------- 1 file changed, 116 insertions(+), 38 deletions(-) diff --git a/utils/io/src/io.c b/utils/io/src/io.c index 5fd21bb59..e032b3768 100644 --- a/utils/io/src/io.c +++ b/utils/io/src/io.c @@ -1,9 +1,11 @@ /* * Simple app. to do memory accesses via /dev/mem. * - * $Id: io.c,v 1.5 2000/08/21 09:01:57 richard Exp $ + * $Id: io.c,v 2.0 $ * * Copyright (c) Richard Hirst + * Copyright (c) Thomas Langer + * */ #include @@ -16,24 +18,23 @@ #include #include -#ifndef FALSE -#define FALSE 0 -#define TRUE (!FALSE) -#endif - -static char *argv0; +#define MEM_READ 0 +#define MEM_WRITE 1 +#define MEM_AND 2 +#define MEM_OR 3 static void -usage (void) +usage (char *argv0) { fprintf(stderr, -"Raw memory i/o utility - $Revision: 1.5 $\n\n" -"%s -v -1|2|4 -r|w [-l ] [-f ] []\n\n" +"Raw memory i/o utility - $Revision: 2.0 $\n\n" +"%s -v -1|2|4 -r|w|a|o [-l ] [-f ] []\n\n" " -v Verbose, asks for confirmation\n" " -1|2|4 Sets memory access size in bytes (default byte)\n" " -l Length in bytes of area to access (defaults to\n" " one access, or whole file length)\n" -" -r|w Read from or Write to memory (default read)\n" +" -r|w|a|o Read from or Write to memory (default read)\n" +" optional write with modify (and/or)\n" " -f File to write on memory read, or\n" " to read on memory write\n" " The memory address to access\n" @@ -110,6 +111,64 @@ write_memory(unsigned long phys_addr, void *addr, int len, int iosize, unsigned } +static void +and_write_memory(unsigned long phys_addr, void *addr, int len, int iosize, unsigned long value) +{ + switch(iosize) { + case 1: + while (len) { + *(unsigned char *)addr &= value; + len -= iosize; + addr += iosize; + } + break; + case 2: + while (len) { + *(unsigned short *)addr &= value; + len -= iosize; + addr += iosize; + } + break; + case 4: + while (len) { + *(unsigned long *)addr &= value; + len -= iosize; + addr += iosize; + } + break; + } +} + + +static void +or_write_memory(unsigned long phys_addr, void *addr, int len, int iosize, unsigned long value) +{ + switch(iosize) { + case 1: + while (len) { + *(unsigned char *)addr |= value; + len -= iosize; + addr += iosize; + } + break; + case 2: + while (len) { + *(unsigned short *)addr |= value; + len -= iosize; + addr += iosize; + } + break; + case 4: + while (len) { + *(unsigned long *)addr |= value; + len -= iosize; + addr += iosize; + } + break; + } +} + + int main (int argc, char **argv) { @@ -117,20 +176,19 @@ main (int argc, char **argv) void *real_io; unsigned long real_len, real_addr, req_addr, req_value = 0, offset; char *endptr; - int memread = TRUE; + int memfunc = MEM_READ; int iosize = 1; char *filename = NULL; int verbose = 0; - argv0 = argv[0]; opterr = 0; if (argc == 1) - usage(); + usage(argv[0]); - while ((opt = getopt(argc, argv, "hv124rwl:f:")) > 0) { + while ((opt = getopt(argc, argv, "hv124rwaol:f:")) > 0) { switch (opt) { case 'h': - usage(); + usage(argv[0]); case 'v': verbose = 1; break; @@ -140,10 +198,16 @@ main (int argc, char **argv) iosize = opt - '0'; break; case 'r': - memread = TRUE; + memfunc = MEM_READ; + break; + case 'a': + memfunc = MEM_AND; + break; + case 'o': + memfunc = MEM_OR; break; case 'w': - memread = FALSE; + memfunc = MEM_WRITE; break; case 'l': req_len = strtoul(optarg, &endptr, 0); @@ -157,7 +221,7 @@ main (int argc, char **argv) break; default: fprintf(stderr, "Unknown option: %c\n", opt); - usage(); + usage(argv[0]); } } @@ -171,17 +235,18 @@ main (int argc, char **argv) exit(1); } optind++; - if (!filename && optind < argc) - memread = FALSE; + if (!filename && (memfunc == MEM_READ) && optind < argc) { + memfunc = MEM_WRITE; + } if (filename && optind > argc) { fprintf(stderr, "Filename AND value given\n"); exit(1); } - if (!filename && !memread && optind == argc) { + if (!filename && (memfunc != MEM_READ) && optind == argc) { fprintf(stderr, "No value given for WRITE\n"); exit(1); } - if (!filename && !memread) { + if (!filename && (memfunc != MEM_READ)) { req_value = strtoul(argv[optind], &endptr, 0); if (*endptr) { fprintf(stderr, "Bad value '%s'\n", argv[optind]); @@ -194,7 +259,7 @@ main (int argc, char **argv) } optind++; } - if (filename && memread && !req_len) { + if (filename && (memfunc == MEM_READ) && !req_len) { fprintf(stderr, "No size given for file memread\n"); exit(1); } @@ -202,14 +267,14 @@ main (int argc, char **argv) fprintf(stderr, "Too many arguments '%s'...\n", argv[optind]); exit(1); } - if (filename && memread) { + if (filename && (memfunc == MEM_READ)) { ffd = open(filename, O_WRONLY|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH); if (ffd < 0) { fprintf(stderr, "Failed to open destination file '%s': %s\n", filename, strerror(errno)); exit(1); } } - if (filename && !memread) { + if (filename && (memfunc != MEM_READ)) { ffd = open(filename, O_RDONLY); if (ffd < 0) { fprintf(stderr, "Failed to open source file '%s': %s\n", filename, strerror(errno)); @@ -243,19 +308,19 @@ main (int argc, char **argv) fprintf(stderr, "Badly aligned for access size\n"); exit(1); } - + if (!verbose) /* Nothing */; - else if (filename && memread) - printf("Request to memread 0x%x bytes from address 0x%08lx\n" + else if (filename && (memfunc == MEM_READ)) + printf("Request to read 0x%x bytes from address 0x%08lx\n" "\tto file %s, using %d byte accesses\n", req_len, req_addr, filename, iosize); else if (filename) printf("Request to write 0x%x bytes to address 0x%08lx\n" "\tfrom file %s, using %d byte accesses\n", req_len, req_addr, filename, iosize); - else if (memread) - printf("Request to memread 0x%x bytes from address 0x%08lx\n" + else if (memfunc == MEM_READ) + printf("Request to read 0x%x bytes from address 0x%08lx\n" "\tusing %d byte accesses\n", req_len, req_addr, iosize); else @@ -279,7 +344,7 @@ main (int argc, char **argv) printf("Attempting to map 0x%lx bytes at address 0x%08lx\n", real_len, real_addr); - mfd = open("/dev/mem", memread ? O_RDONLY : O_RDWR); + mfd = open("/dev/mem", (memfunc == MEM_READ) ? O_RDONLY : O_RDWR); if (mfd == -1) { perror("open /dev/mem"); exit(1); @@ -287,7 +352,7 @@ main (int argc, char **argv) if (verbose) printf("open(/dev/mem) ok\n"); real_io = mmap(NULL, real_len, - memread ? PROT_READ:PROT_WRITE, + (memfunc == MEM_READ) ? PROT_READ:PROT_READ|PROT_WRITE, MAP_SHARED, mfd, real_addr); if (real_io == (void *)(-1)) { fprintf(stderr, "mmap() failed: %s\n", strerror(errno)); @@ -308,7 +373,7 @@ main (int argc, char **argv) } } - if (filename && memread) { + if (filename && (memfunc == MEM_READ)) { int n = write(ffd, real_io + offset, req_len); if (n < 0) { @@ -334,10 +399,23 @@ main (int argc, char **argv) exit(1); } } - else if (memread) - memread_memory(req_addr, real_io + offset, req_len, iosize); - else - write_memory(req_addr, real_io + offset, req_len, iosize, req_value); + else { + switch (memfunc) + { + case MEM_READ: + memread_memory(req_addr, real_io + offset, req_len, iosize); + break; + case MEM_WRITE: + write_memory(req_addr, real_io + offset, req_len, iosize, req_value); + break; + case MEM_AND: + and_write_memory(req_addr, real_io + offset, req_len, iosize, req_value); + break; + case MEM_OR: + or_write_memory(req_addr, real_io + offset, req_len, iosize, req_value); + break; + } + } if (filename) close(ffd); -- 2.11.0