diff options
Diffstat (limited to 'util/nvmutil/lib/word.c')
| -rw-r--r-- | util/nvmutil/lib/word.c | 48 |
1 files changed, 9 insertions, 39 deletions
diff --git a/util/nvmutil/lib/word.c b/util/nvmutil/lib/word.c index 4a8280ba..5d9220c7 100644 --- a/util/nvmutil/lib/word.c +++ b/util/nvmutil/lib/word.c @@ -1,48 +1,25 @@ /* SPDX-License-Identifier: MIT - * * Copyright (c) 2022-2026 Leah Rowe <leah@libreboot.org> * - * Manipulate sixteen-bit little-endian - * words on Intel GbE NVM configurations. + * Manipulate Intel GbE NVM words, which are 16-bit little + * endian in the files (MAC address words are big endian). */ -#ifdef __OpenBSD__ -#include <sys/param.h> -#endif #include <sys/types.h> -#include <sys/stat.h> #include <errno.h> -#include <fcntl.h> -#include <limits.h> -#include <stdarg.h> #include <stddef.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <time.h> -#include <unistd.h> #include "../include/common.h" -/* - * GbE NVM files store 16-bit (2-byte) little-endian words. - * We must therefore swap the order when reading or writing. - * - * NOTE: The MAC address words are stored big-endian in the - * file, but we assume otherwise and adapt accordingly. - */ - unsigned short nvm_word(unsigned long pos16, unsigned long p) { - struct xstate *x = xstatus(); - struct xfile *f; + struct xstate *x = xstatus(0, NULL); + struct xfile *f = &x->f; unsigned long pos; - f = &x->f; - check_nvm_bound(pos16, p); pos = (pos16 << 1) + (p * GBE_PART_SIZE); @@ -53,13 +30,11 @@ nvm_word(unsigned long pos16, unsigned long p) void set_nvm_word(unsigned long pos16, unsigned long p, unsigned short val16) { - struct xstate *x = xstatus(); - struct xfile *f; + struct xstate *x = xstatus(0, NULL); + struct xfile *f = &x->f; unsigned long pos; - f = &x->f; - check_nvm_bound(pos16, p); pos = (pos16 << 1) + (p * GBE_PART_SIZE); @@ -72,10 +47,8 @@ set_nvm_word(unsigned long pos16, unsigned long p, unsigned short val16) void set_part_modified(unsigned long p) { - struct xstate *x = xstatus(); - struct xfile *f; - - f = &x->f; + struct xstate *x = xstatus(0, NULL); + struct xfile *f = &x->f; check_bin(p, "part number"); f->part_modified[p] = 1; @@ -84,10 +57,7 @@ set_part_modified(unsigned long p) void check_nvm_bound(unsigned long c, unsigned long p) { - /* - * NVM_SIZE assumed as the limit, because this - * current design assumes that we will only - * ever modified the NVM area. + /* Block out of bound NVM access */ check_bin(p, "part number"); |