cregit-Linux how code gets into the kernel

Release 4.18 drivers/firmware/google/coreboot_table.h

/*
 * 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>
 *
 * 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
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#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);

/* 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 */

Overall Contributors

PersonTokensPropCommitsCommitProp
Samuel Holland16674.77%266.67%
Thierry Escande5625.23%133.33%
Total222100.00%3100.00%
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