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- /* SPDX-License-Identifier: GPL-2.0-only */
- /*
- * coreboot_table.h
- *
- * Internal header for coreboot table access.
- *
- * Copyright 2014 Gerd Hoffmann <kraxel@redhat.com>
- * Copyright 2017 Google Inc.
- * Copyright 2017 Samuel Holland <samuel@sholland.org>
- */
- #ifndef __COREBOOT_TABLE_H
- #define __COREBOOT_TABLE_H
- #include <linux/device.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);
- /* module_coreboot_driver() - Helper macro for drivers that don't do
- * anything special in module init/exit. This eliminates a lot of
- * boilerplate. Each module may only use this macro once, and
- * calling it replaces module_init() and module_exit()
- */
- #define module_coreboot_driver(__coreboot_driver) \
- module_driver(__coreboot_driver, coreboot_driver_register, \
- coreboot_driver_unregister)
- #endif /* __COREBOOT_TABLE_H */
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