diff options
Diffstat (limited to 'core/busybox/busybox-devmem.patch')
| -rw-r--r-- | core/busybox/busybox-devmem.patch | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/core/busybox/busybox-devmem.patch b/core/busybox/busybox-devmem.patch new file mode 100644 index 00000000000..3932119ab08 --- /dev/null +++ b/core/busybox/busybox-devmem.patch @@ -0,0 +1,128 @@ +diff -Nrup include/applets.h include/applets.h +--- include/applets.h 2008-04-26 18:22:37.000000000 +0000 ++++ include/applets.h 2008-04-26 18:19:53.000000000 +0000 +@@ -121,6 +121,7 @@ USE_DEALLOCVT(APPLET(deallocvt, _BB_DIR_ + USE_DELGROUP(APPLET_ODDNAME(delgroup, deluser, _BB_DIR_BIN, _BB_SUID_NEVER, delgroup)) + USE_DELUSER(APPLET(deluser, _BB_DIR_BIN, _BB_SUID_NEVER)) + USE_DEVFSD(APPLET(devfsd, _BB_DIR_SBIN, _BB_SUID_NEVER)) ++USE_DEVMEM(APPLET(devmem, _BB_DIR_SBIN, _BB_SUID_NEVER)) + USE_DF(APPLET(df, _BB_DIR_BIN, _BB_SUID_NEVER)) + USE_APP_DHCPRELAY(APPLET(dhcprelay, _BB_DIR_USR_SBIN, _BB_SUID_NEVER)) + USE_DIFF(APPLET(diff, _BB_DIR_USR_BIN, _BB_SUID_NEVER)) +diff -Nrup include/usage.h include/usage.h +--- include/usage.h 2007-12-21 22:00:31.000000000 +0000 ++++ include/usage.h 2008-04-26 18:21:59.000000000 +0000 +@@ -630,6 +630,16 @@ + "\n and processing synthetic REGISTER events," \ + "\n do not poll for events") + ++#define devmem_trivial_usage \ ++ "{ address } [ type [ data ] ]" ++ ++#define devmem_full_usage \ ++ "Read/Write from physical addresses" \ ++ "\n\nUsage: devmem { address } [ type [ data ] ]" \ ++ "\n address : memory address to act upon" \ ++ "\n type : access operation type : [b]yte, [h]alfword, [w]ord" \ ++ "\n data : data to be written" ++ + /* -k is accepted but ignored for !HUMAN_READABLE, + * but we won't mention this (unimportant) */ + #if ENABLE_FEATURE_HUMAN_READABLE || ENABLE_FEATURE_DF_INODE +diff -Nrup miscutils/Config.in miscutils/Config.in +--- miscutils/Config.in 2007-12-21 22:00:31.000000000 +0000 ++++ miscutils/Config.in 2008-04-26 17:54:51.000000000 +0000 +@@ -120,6 +120,13 @@ config FEATURE_DEVFS + /dev/loop0. If your /dev directory has normal names instead of + devfs names, you don't want this. + ++config DEVMEM ++ bool "devmem" ++ default y ++ help ++ devmem is a small program that reads and writes from physical ++ memory using /dev/mem. ++ + config EJECT + bool "eject" + default n +diff -Nrup miscutils/Kbuild miscutils/Kbuild +--- miscutils/Kbuild 2007-12-21 22:00:31.000000000 +0000 ++++ miscutils/Kbuild 2008-04-26 17:56:36.000000000 +0000 +@@ -12,6 +12,7 @@ lib-$(CONFIG_CROND) += crond.o + lib-$(CONFIG_CRONTAB) += crontab.o + lib-$(CONFIG_DC) += dc.o + lib-$(CONFIG_DEVFSD) += devfsd.o ++lib-$(CONFIG_DEVMEM) += devmem.o + lib-$(CONFIG_EJECT) += eject.o + lib-$(CONFIG_HDPARM) += hdparm.o + lib-$(CONFIG_LAST) += last.o +diff -Nrup miscutils/devmem.c miscutils/devmem.c +--- miscutils/devmem.c 1970-01-01 00:00:00.000000000 +0000 ++++ miscutils/devmem.c 2008-04-26 18:18:30.000000000 +0000 +@@ -0,0 +1,65 @@ ++/* ++ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. ++ * Copyright (C) 2000, Jan-Derk Bakker (J.D.Bakker@its.tudelft.nl) ++ * Copyright (C) 2008, BusyBox Team. -solar 4/26/08 ++ */ ++ ++#include "libbb.h" ++ ++#define DEVMEM_MAP_SIZE 4096UL ++#define DEVMEM_MAP_MASK (DEVMEM_MAP_SIZE - 1) ++ ++int devmem_main(int argc, char **argv) { ++ void *map_base, *virt_addr; ++ unsigned long read_result, writeval; ++ off_t target; ++ int fd, access_type = 'w'; ++ ++ if (argc < 2) ++ bb_show_usage(); ++ ++ target = bb_strtoul(argv[1], 0, 0); ++ ++ if (argc > 2) ++ access_type = tolower(argv[2][0]); ++ ++ fd = xopen("/dev/mem", O_RDWR | O_SYNC); ++ ++ if ((map_base = mmap(0, DEVMEM_MAP_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, target & ~DEVMEM_MAP_MASK)) == MAP_FAILED) ++ bb_perror_msg_and_die("mmap"); ++ ++ printf("Memory mapped at address %p.\n", map_base); ++ ++ virt_addr = map_base + (target & DEVMEM_MAP_MASK); ++ if (access_type == 'b') ++ read_result = *((unsigned char *) virt_addr); ++ else if (access_type == 'h') ++ read_result = *((unsigned short *) virt_addr); ++ else if (access_type == 'w') ++ read_result = *((unsigned long *) virt_addr); ++ else { ++ fprintf(stderr, "Illegal data type '%c'\n", access_type); ++ exit(EXIT_FAILURE); ++ } ++ printf("Value at address 0x%X (%p): 0x%X\n", target, virt_addr, read_result); ++ ++ if (argc > 3) { ++ writeval = bb_strtoul(argv[3], 0, 0); ++ if (access_type == 'b') { ++ *((unsigned char *) virt_addr) = writeval; ++ read_result = *((unsigned char *) virt_addr); ++ } else if (access_type == 'h') { ++ *((unsigned short *) virt_addr) = writeval; ++ read_result = *((unsigned short *) virt_addr); ++ } else if (access_type == 'w') { ++ *((unsigned long *) virt_addr) = writeval; ++ read_result = *((unsigned long *) virt_addr); ++ } ++ printf("Written 0x%X; readback 0x%X\n", writeval, read_result); ++ } ++ ++ if (munmap(map_base, DEVMEM_MAP_SIZE) == -1) ++ bb_perror_msg_and_die("munmap"); ++ close(fd); ++ fflush_stdout_and_exit(EXIT_SUCCESS); ++} |