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Diffstat (limited to 'util/lxbios/layout.c')
-rw-r--r-- | util/lxbios/layout.c | 513 |
1 files changed, 0 insertions, 513 deletions
diff --git a/util/lxbios/layout.c b/util/lxbios/layout.c deleted file mode 100644 index 6e47521c47..0000000000 --- a/util/lxbios/layout.c +++ /dev/null @@ -1,513 +0,0 @@ -/*****************************************************************************\ - * layout.c - * $Id$ - ***************************************************************************** - * Copyright (C) 2002-2005 The Regents of the University of California. - * Produced at the Lawrence Livermore National Laboratory. - * Written by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>. - * UCRL-CODE-2003-012 - * All rights reserved. - * - * This file is part of nvramtool, a utility for reading/writing coreboot - * parameters and displaying information from the coreboot table. - * For details, see http://coreboot.org/nvramtool. - * - * Please also read the file DISCLAIMER which is included in this software - * distribution. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License (as published by the - * Free Software Foundation) version 2, dated June 1991. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and - * conditions of the GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. -\*****************************************************************************/ - -#include "common.h" -#include "layout.h" -#include "cmos_lowlevel.h" - -typedef struct cmos_entry_item_t cmos_entry_item_t; - -struct cmos_entry_item_t - { cmos_entry_t item; - cmos_entry_item_t *next; - }; - -typedef struct cmos_enum_item_t cmos_enum_item_t; - -struct cmos_enum_item_t - { cmos_enum_t item; - cmos_enum_item_t *next; - }; - -static void default_cmos_layout_get_fn (void); -static int areas_overlap (unsigned area_0_start, unsigned area_0_length, - unsigned area_1_start, unsigned area_1_length); -static int entries_overlap (const cmos_entry_t *p, const cmos_entry_t *q); -static const cmos_enum_item_t * find_first_cmos_enum_id (unsigned config_id); - -const char checksum_param_name[] = "check_sum"; - -/* Newer versions of coreboot store the 3 pieces of information below in the - * coreboot table so we don't have to rely on hardcoded values. - */ - -/* This is the offset from the start of CMOS of the first byte that the - * checksum is calculated over. - */ -#define CMOS_CHECKSUM_START 49 - -/* This is the offset from the start of CMOS of the last byte that the - * checksum is calculated over. - */ -#define CMOS_CHECKSUM_END 125 - -/* This is the offset from the start of CMOS where the coreboot checksum is - * stored. - */ -#define CMOS_CHECKSUM_INDEX 126 - -/* index of first byte of checksummed area */ -unsigned cmos_checksum_start = CMOS_CHECKSUM_START; - -/* index of last byte of checksummed area */ -unsigned cmos_checksum_end = CMOS_CHECKSUM_END; - -/* index of first byte of CMOS checksum (a big-endian 16-bit value) */ -unsigned cmos_checksum_index = CMOS_CHECKSUM_INDEX; - -/* List is sorted in ascending order according to 'bit' field in - * cmos_entry_t. - */ -static cmos_entry_item_t *cmos_entry_list = NULL; - -/* List is sorted in ascending order: first by 'config_id' and then by - * 'value'. - */ -static cmos_enum_item_t *cmos_enum_list = NULL; - -static cmos_layout_get_fn_t cmos_layout_get_fn = default_cmos_layout_get_fn; - -/**************************************************************************** - * entries_overlap - * - * Return 1 if cmos entries 'p' and 'q' overlap. Else return 0. - ****************************************************************************/ -static inline int entries_overlap (const cmos_entry_t *p, - const cmos_entry_t *q) - { return areas_overlap(p->bit, p->length, q->bit, q->length); } - -/**************************************************************************** - * cmos_entry_to_const_item - * - * Return a pointer to the cmos_entry_item_t that 'p' is embedded within. - ****************************************************************************/ -static inline const cmos_entry_item_t * cmos_entry_to_const_item - (const cmos_entry_t *p) - { static const cmos_entry_t *pos = &((cmos_entry_item_t *) 0)->item; - unsigned long offset, address; - - offset = (unsigned long) pos; - address = ((unsigned long) p) - offset; - return (const cmos_entry_item_t *) address; - } - -/**************************************************************************** - * cmos_enum_to_const_item - * - * Return a pointer to the cmos_enum_item_t that 'p' is embedded within. - ****************************************************************************/ -static inline const cmos_enum_item_t * cmos_enum_to_const_item - (const cmos_enum_t *p) - { static const cmos_enum_t *pos = &((cmos_enum_item_t *) 0)->item; - unsigned long offset, address; - - offset = (unsigned long) pos; - address = ((unsigned long) p) - offset; - return (const cmos_enum_item_t *) address; - } - -/**************************************************************************** - * register_cmos_layout_get_fn - * - * Set 'fn' as the function that will be called to retrieve CMOS layout - * information. - ****************************************************************************/ -void register_cmos_layout_get_fn (cmos_layout_get_fn_t fn) - { cmos_layout_get_fn = fn; } - -/**************************************************************************** - * get_cmos_layout - * - * Retrieve CMOS layout information and store it in our internal repository. - ****************************************************************************/ -void get_cmos_layout (void) - { cmos_layout_get_fn(); } - -/**************************************************************************** - * add_cmos_entry - * - * Attempt to add CMOS entry 'e' to our internal repository of layout - * information. Return OK on success or an error code on failure. If - * operation fails because 'e' overlaps an existing CMOS entry, '*conflict' - * will be set to point to the overlapping entry. - ****************************************************************************/ -int add_cmos_entry (const cmos_entry_t *e, const cmos_entry_t **conflict) - { cmos_entry_item_t *item, *prev, *new_entry; - - *conflict = NULL; - - if (e->length < 1) - return LAYOUT_ENTRY_BAD_LENGTH; - - if ((new_entry = (cmos_entry_item_t *) malloc(sizeof(*new_entry))) == NULL) - out_of_memory(); - - new_entry->item = *e; - - if (cmos_entry_list == NULL) - { new_entry->next = NULL; - cmos_entry_list = new_entry; - return OK; - } - - /* Find place in list to insert new entry. List is sorted in ascending - * order. - */ - for (item = cmos_entry_list, prev = NULL; - (item != NULL) && (item->item.bit < e->bit); - prev = item, item = item->next); - - if (prev == NULL) - { if (entries_overlap(e, &cmos_entry_list->item)) - { *conflict = &cmos_entry_list->item; - goto fail; - } - - new_entry->next = cmos_entry_list; - cmos_entry_list = new_entry; - return OK; - } - - if (entries_overlap(&prev->item, e)) - { *conflict = &prev->item; - goto fail; - } - - if ((item != NULL) && entries_overlap(e, &item->item)) - { *conflict = &item->item; - goto fail; - } - - new_entry->next = item; - prev->next = new_entry; - return OK; - -fail: - free(new_entry); - return LAYOUT_ENTRY_OVERLAP; - } - -/**************************************************************************** - * find_cmos_entry - * - * Search for a CMOS entry whose name is 'name'. Return pointer to matching - * entry or NULL if entry not found. - ****************************************************************************/ -const cmos_entry_t * find_cmos_entry (const char name[]) - { cmos_entry_item_t *item; - - for (item = cmos_entry_list; item != NULL; item = item->next) - { if (!strcmp(item->item.name, name)) - return &item->item; - } - - return NULL; - } - -/**************************************************************************** - * first_cmos_entry - * - * Return a pointer to the first CMOS entry in our list or NULL if list is - * empty. - ****************************************************************************/ -const cmos_entry_t * first_cmos_entry (void) - { return (cmos_entry_list == NULL) ? NULL : &cmos_entry_list->item; } - -/**************************************************************************** - * next_cmos_entry - * - * Return a pointer to next entry in list after 'last' or NULL if no more - * entries. - ****************************************************************************/ -const cmos_entry_t * next_cmos_entry (const cmos_entry_t *last) - { const cmos_entry_item_t *last_item, *next_item; - - last_item = cmos_entry_to_const_item(last); - next_item = last_item->next; - return (next_item == NULL) ? NULL : &next_item->item; - } - -/**************************************************************************** - * add_cmos_enum - * - * Attempt to add CMOS enum 'e' to our internal repository of layout - * information. Return OK on success or an error code on failure. - ****************************************************************************/ -int add_cmos_enum (const cmos_enum_t *e) - { cmos_enum_item_t *item, *prev, *new_enum; - - if ((new_enum = (cmos_enum_item_t *) malloc(sizeof(*new_enum))) == NULL) - out_of_memory(); - - new_enum->item = *e; - - if (cmos_enum_list == NULL) - { new_enum->next = NULL; - cmos_enum_list = new_enum; - return OK; - } - - /* The list of enums is sorted in ascending order, first by 'config_id' and - * then by 'value'. Look for the first enum whose 'config_id' field - * matches 'e'. - */ - for (item = cmos_enum_list, prev = NULL; - (item != NULL) && (item->item.config_id < e->config_id); - prev = item, item = item->next); - - if (item == NULL) - { new_enum->next = NULL; - prev->next = new_enum; - return OK; - } - - if (item->item.config_id > e->config_id) - { new_enum->next = item; - - if (prev == NULL) - cmos_enum_list = new_enum; - else - prev->next = new_enum; - - return OK; - } - - /* List already contains at least one enum whose 'config_id' matches 'e'. - * Now find proper place to insert 'e' based on 'value'. - */ - while (item->item.value < e->value) - { prev = item; - item = item->next; - - if ((item == NULL) || (item->item.config_id != e->config_id)) - { new_enum->next = item; - prev->next = new_enum; - return OK; - } - } - - if (item->item.value == e->value) - { free(new_enum); - return LAYOUT_DUPLICATE_ENUM; - } - - new_enum->next = item; - - if (prev == NULL) - cmos_enum_list = new_enum; - else - prev->next = new_enum; - - return OK; - } - -/**************************************************************************** - * find_cmos_enum - * - * Search for an enum that matches 'config_id' and 'value'. If found, return - * a pointer to the mathcing enum. Else return NULL. - ****************************************************************************/ -const cmos_enum_t * find_cmos_enum (unsigned config_id, - unsigned long long value) - { const cmos_enum_item_t *item; - - if ((item = find_first_cmos_enum_id(config_id)) == NULL) - return NULL; - - while (item->item.value < value) - { item = item->next; - - if ((item == NULL) || (item->item.config_id != config_id)) - return NULL; - } - - return (item->item.value == value) ? &item->item : NULL; - } - -/**************************************************************************** - * first_cmos_enum - * - * Return a pointer to the first CMOS enum in our list or NULL if list is - * empty. - ****************************************************************************/ -const cmos_enum_t * first_cmos_enum (void) - { return (cmos_enum_list == NULL) ? NULL : &cmos_enum_list->item; } - -/**************************************************************************** - * next_cmos_enum - * - * Return a pointer to next enum in list after 'last' or NULL if no more - * enums. - ****************************************************************************/ -const cmos_enum_t * next_cmos_enum (const cmos_enum_t *last) - { const cmos_enum_item_t *last_item, *next_item; - - last_item = cmos_enum_to_const_item(last); - next_item = last_item->next; - return (next_item == NULL) ? NULL : &next_item->item; - } - -/**************************************************************************** - * first_cmos_enum_id - * - * Return a pointer to the first CMOS enum in our list that matches - * 'config_id' or NULL if there are no matching enums. - ****************************************************************************/ -const cmos_enum_t * first_cmos_enum_id (unsigned config_id) - { const cmos_enum_item_t *item; - - item = find_first_cmos_enum_id(config_id); - return (item == NULL) ? NULL : &item->item; - } - -/**************************************************************************** - * next_cmos_enum_id - * - * Return a pointer to next enum in list after 'last' that matches the - * 'config_id' field of 'last' or NULL if there are no more matching enums. - ****************************************************************************/ -const cmos_enum_t * next_cmos_enum_id (const cmos_enum_t *last) - { const cmos_enum_item_t *item; - - item = cmos_enum_to_const_item(last)->next; - return ((item == NULL) || (item->item.config_id != last->config_id)) ? - NULL : &item->item; - } - -/**************************************************************************** - * is_checksum_name - * - * Return 1 if 'name' matches the name of the parameter representing the CMOS - * checksum. Else return 0. - ****************************************************************************/ -int is_checksum_name (const char name[]) - { return !strcmp(name, checksum_param_name); } - -/**************************************************************************** - * checksum_layout_to_bytes - * - * On entry, '*layout' contains checksum-related layout information expressed - * in bits. Perform sanity checking on the information and convert it from - * bit positions to byte positions. Return OK on success or an error code if - * a sanity check fails. - ****************************************************************************/ -int checksum_layout_to_bytes (cmos_checksum_layout_t *layout) - { unsigned start, end, index; - - start = layout->summed_area_start; - end = layout->summed_area_end; - index = layout->checksum_at; - - if (start % 8) - return LAYOUT_SUMMED_AREA_START_NOT_ALIGNED; - - if ((end % 8) != 7) - return LAYOUT_SUMMED_AREA_END_NOT_ALIGNED; - - if (index % 8) - return LAYOUT_CHECKSUM_LOCATION_NOT_ALIGNED; - - if (end <= start) - return LAYOUT_INVALID_SUMMED_AREA; - - /* Convert bit positions to byte positions. */ - start /= 8; - end /= 8; /* equivalent to "end = ((end - 7) / 8)" */ - index /= 8; - - if (verify_cmos_byte_index(start) || verify_cmos_byte_index(end)) - return LAYOUT_SUMMED_AREA_OUT_OF_RANGE; - - if (verify_cmos_byte_index(index)) - return LAYOUT_CHECKSUM_LOCATION_OUT_OF_RANGE; - - /* checksum occupies 16 bits */ - if (areas_overlap(start, end - start + 1, index, index + 1)) - return LAYOUT_CHECKSUM_OVERLAPS_SUMMED_AREA; - - layout->summed_area_start = start; - layout->summed_area_end = end; - layout->checksum_at = index; - return OK; - } - -/**************************************************************************** - * checksum_layout_to_bits - * - * On entry, '*layout' contains checksum-related layout information expressed - * in bytes. Convert this information to bit positions. - ****************************************************************************/ -void checksum_layout_to_bits (cmos_checksum_layout_t *layout) - { layout->summed_area_start *= 8; - layout->summed_area_end = (layout->summed_area_end * 8) + 7; - layout->checksum_at *= 8; - } - -/**************************************************************************** - * default_cmos_layout_get_fn - * - * If this function is ever called, it means that an appropriate callback for - * obtaining CMOS layout information was not set before attempting to - * retrieve layout information. - ****************************************************************************/ -static void default_cmos_layout_get_fn (void) - { BUG(); } - -/**************************************************************************** - * areas_overlap - * - * Return 1 if the two given areas overlap. Else return 0. - ****************************************************************************/ -static int areas_overlap (unsigned area_0_start, unsigned area_0_length, - unsigned area_1_start, unsigned area_1_length) - { unsigned area_0_end, area_1_end; - - area_0_end = area_0_start + area_0_length - 1; - area_1_end = area_1_start + area_1_length - 1; - return ((area_1_start <= area_0_end) && (area_0_start <= area_1_end)); - } - -/**************************************************************************** - * find_first_cmos_enum_id - * - * Return a pointer to the first item in our list of enums that matches - * 'config_id'. Return NULL if there is no matching enum. - ****************************************************************************/ -static const cmos_enum_item_t * find_first_cmos_enum_id (unsigned config_id) - { cmos_enum_item_t *item; - - for (item = cmos_enum_list; - (item != NULL) && (item->item.config_id < config_id); - item = item->next); - - return ((item == NULL) || (item->item.config_id > config_id)) ? - NULL : item; - } |