blob: 8ad95a94481b6e1511ae2e0cf1fd7c362940fd27 [file] [log] [blame]
* coreboot_table.h
* Internal header for coreboot table access.
* Copyright 2014 Gerd Hoffmann <>
* Copyright 2017 Google Inc.
* Copyright 2017 Samuel Holland <>
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License v2.0 as published by
* the Free Software Foundation.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
#include <linux/io.h>
/* Coreboot table header structure */
struct coreboot_table_header {
char signature[4];
u32 header_bytes;
u32 header_checksum;
u32 table_bytes;
u32 table_checksum;
u32 table_entries;
/* List of coreboot entry structures that is used */
/* Generic */
struct coreboot_table_entry {
u32 tag;
u32 size;
/* Points to a CBMEM entry */
struct lb_cbmem_ref {
u32 tag;
u32 size;
u64 cbmem_addr;
/* Describes framebuffer setup by coreboot */
struct lb_framebuffer {
u32 tag;
u32 size;
u64 physical_address;
u32 x_resolution;
u32 y_resolution;
u32 bytes_per_line;
u8 bits_per_pixel;
u8 red_mask_pos;
u8 red_mask_size;
u8 green_mask_pos;
u8 green_mask_size;
u8 blue_mask_pos;
u8 blue_mask_size;
u8 reserved_mask_pos;
u8 reserved_mask_size;
/* A device, additionally with information from coreboot. */
struct coreboot_device {
struct device dev;
union {
struct coreboot_table_entry entry;
struct lb_cbmem_ref cbmem_ref;
struct lb_framebuffer framebuffer;
/* A driver for handling devices described in coreboot tables. */
struct coreboot_driver {
int (*probe)(struct coreboot_device *);
int (*remove)(struct coreboot_device *);
struct device_driver drv;
u32 tag;
/* Register a driver that uses the data from a coreboot table. */
int coreboot_driver_register(struct coreboot_driver *driver);
/* Unregister a driver that uses the data from a coreboot table. */
void coreboot_driver_unregister(struct coreboot_driver *driver);
/* Initialize coreboot table module given a pointer to iomem */
int coreboot_table_init(struct device *dev, void __iomem *ptr);
/* Cleanup coreboot table module */
int coreboot_table_exit(void);
#endif /* __COREBOOT_TABLE_H */