util/nvramtool/layout.h

/* SPDX-License-Identifier: GPL-2.0-only */

#ifndef LAYOUT_H
#define LAYOUT_H

#include "common.h"
#include "coreboot_tables.h"

#define LAYOUT_ENTRY_OVERLAP (LAYOUT_RESULT_START + 0)
#define LAYOUT_ENTRY_BAD_LENGTH (LAYOUT_RESULT_START + 1)
#define LAYOUT_DUPLICATE_ENUM (LAYOUT_RESULT_START + 2)
#define LAYOUT_SUMMED_AREA_START_NOT_ALIGNED (LAYOUT_RESULT_START + 3)
#define LAYOUT_SUMMED_AREA_END_NOT_ALIGNED (LAYOUT_RESULT_START + 4)
#define LAYOUT_CHECKSUM_LOCATION_NOT_ALIGNED (LAYOUT_RESULT_START + 5)
#define LAYOUT_INVALID_SUMMED_AREA (LAYOUT_RESULT_START + 6)
#define LAYOUT_CHECKSUM_OVERLAPS_SUMMED_AREA (LAYOUT_RESULT_START + 7)
#define LAYOUT_SUMMED_AREA_OUT_OF_RANGE (LAYOUT_RESULT_START + 8)
#define LAYOUT_CHECKSUM_LOCATION_OUT_OF_RANGE (LAYOUT_RESULT_START + 9)
#define LAYOUT_MULTIBYTE_ENTRY_NOT_ALIGNED (LAYOUT_RESULT_START + 10)

typedef enum {
	CMOS_ENTRY_ENUM = 'e',
	CMOS_ENTRY_HEX = 'h',
	CMOS_ENTRY_STRING = 's',
	CMOS_ENTRY_RESERVED = 'r',
} cmos_entry_config_t;

/* This represents a CMOS parameter. */
typedef struct {
	unsigned bit;
	unsigned length;
	cmos_entry_config_t config;
	unsigned config_id;
	char name[CMOS_MAX_NAME_LENGTH + 1];
} cmos_entry_t;

/* This represents a possible value for a CMOS parameter of type
 * CMOS_ENTRY_ENUM.
 */
typedef struct {
	unsigned config_id;
	unsigned long long value;
	char text[CMOS_MAX_TEXT_LENGTH + 1];
} cmos_enum_t;

/* This represents the location of the CMOS checksum and the area over
 * which it is computed.  Depending on the context, the values may be
 * represented as either bit positions or byte positions.
 */
typedef struct {
	unsigned summed_area_start;	/* first checksummed location */
	unsigned summed_area_end;	/* last checksummed location */
	unsigned checksum_at;	/* location of checksum */
} cmos_checksum_layout_t;

extern const char checksum_param_name[];

extern unsigned cmos_checksum_start;

extern unsigned cmos_checksum_end;

extern unsigned cmos_checksum_index;

typedef void (*cmos_layout_get_fn_t) (void);

void register_cmos_layout_get_fn(cmos_layout_get_fn_t fn);
void get_cmos_layout(void);
int add_cmos_entry(const cmos_entry_t * e, const cmos_entry_t ** conflict);
const cmos_entry_t *find_cmos_entry(const char name[]);
const cmos_entry_t *first_cmos_entry(void);
const cmos_entry_t *next_cmos_entry(const cmos_entry_t * last);
int add_cmos_enum(const cmos_enum_t * e);
const cmos_enum_t *find_cmos_enum(unsigned config_id, unsigned long long value);
const cmos_enum_t *first_cmos_enum(void);
const cmos_enum_t *next_cmos_enum(const cmos_enum_t * last);
const cmos_enum_t *first_cmos_enum_id(unsigned config_id);
const cmos_enum_t *next_cmos_enum_id(const cmos_enum_t * last);
int is_checksum_name(const char name[]);
int checksum_layout_to_bytes(cmos_checksum_layout_t * layout);
void checksum_layout_to_bits(cmos_checksum_layout_t * layout);

#endif				/* LAYOUT_H */