/* 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/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); #endif /* __COREBOOT_TABLE_H */