Orange Pi5 kernel

/* 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 */