drivers/firmware/google/coreboot_table.h

   1 /*
   2  * coreboot_table.h
   3  *
   4  * Internal header for coreboot table access.
   5  *
   6  * Copyright 2017 Google Inc.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License v2.0 as published by
  10  * the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #ifndef __COREBOOT_TABLE_H
  19 #define __COREBOOT_TABLE_H
  20
  21 #include <linux/io.h>
  22
  23 /* List of coreboot entry structures that is used */
  24 struct lb_cbmem_ref {
  25         uint32_t tag;
  26         uint32_t size;
  27
  28         uint64_t cbmem_addr;
  29 };
  30
  31 /* Coreboot table header structure */
  32 struct coreboot_table_header {
  33         char signature[4];
  34         u32 header_bytes;
  35         u32 header_checksum;
  36         u32 table_bytes;
  37         u32 table_checksum;
  38         u32 table_entries;
  39 };
  40
  41 /* Retrieve coreboot table entry with tag *tag* and copy it to data */
  42 int coreboot_table_find(int tag, void *data, size_t data_size);
  43
  44 /* Initialize coreboot table module given a pointer to iomem */
  45 int coreboot_table_init(void __iomem *ptr);
  46
  47 /* Cleanup coreboot table module */
  48 int coreboot_table_exit(void);
  49
  50 #endif /* __COREBOOT_TABLE_H */