diff options
Diffstat (limited to 'util/nvramtool/cli/nvramtool.c')
| -rw-r--r-- | util/nvramtool/cli/nvramtool.c | 37 |
1 files changed, 26 insertions, 11 deletions
diff --git a/util/nvramtool/cli/nvramtool.c b/util/nvramtool/cli/nvramtool.c index 23de093fa0..9bc3e4e525 100644 --- a/util/nvramtool/cli/nvramtool.c +++ b/util/nvramtool/cli/nvramtool.c @@ -102,13 +102,9 @@ int main(int argc, char *argv[]) parse_nvramtool_args(argc, argv); - if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_LAYOUT_FILE].found) { - set_layout_filename(nvramtool_op_modifiers - [NVRAMTOOL_MOD_USE_CMOS_LAYOUT_FILE].param); - fn = get_layout_from_file; - } else if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_OPT_TABLE].found) { - fn = get_layout_from_cmos_table; - } else if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CBFS_FILE].found) { + /* If we should operate on a CBFS file default to reading the layout + * and CMOS contents from it. */ + if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CBFS_FILE].found) { open_cbfs(nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CBFS_FILE].param); if (!nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].found) { cmos_default = cbfs_find_file("cmos.default", CBFS_COMPONENT_CMOS_DEFAULT, NULL); @@ -117,36 +113,55 @@ int main(int argc, char *argv[]) exit(1); } } + fn = get_layout_from_cbfs_file; } + + /* If the user wants to use a specific layout file or explicitly use + * the coreboot option table allow him to override previous settings. */ + if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_LAYOUT_FILE].found) { + set_layout_filename(nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_LAYOUT_FILE].param); + fn = get_layout_from_file; + } else if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_OPT_TABLE].found) { + fn = get_layout_from_cmos_table; + } + + /* Allow the user to use a file for the CMOS contents, possibly + * overriding a previously opened "cmos.default" file from the CBFS. */ if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].found) { - int fd; struct stat fd_stat; - if ((fd = open(nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].param, O_RDWR | O_CREAT, 0666)) < 0) { + int fd; + + if ((fd = open(nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].param, O_RDWR | O_CREAT, 0666)) < 0) { fprintf(stderr, "Couldn't open '%s'\n", nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].param); exit(1); } + if (fstat(fd, &fd_stat) == -1) { fprintf(stderr, "Couldn't stat '%s'\n", nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].param); exit(1); } + if (fd_stat.st_size < 128) { lseek(fd, 127, SEEK_SET); write(fd, "\0", 1); fsync(fd); } + cmos_default = mmap(NULL, 128, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); if (cmos_default == MAP_FAILED) { fprintf(stderr, "Couldn't map '%s'\n", nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].param); exit(1); } } + + /* Switch to memory based CMOS access. */ if (cmos_default) { select_hal(HAL_MEMORY, cmos_default); - fn = get_layout_from_cbfs_file; } register_cmos_layout_get_fn(fn); - op_fns[nvramtool_op.op] (); + op_fns[nvramtool_op.op](); + return 0; } |