xref: /openbmc/u-boot/arch/x86/include/asm/tables.h (revision e8f80a5a)
1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
4  */
5 
6 #ifndef _X86_TABLES_H_
7 #define _X86_TABLES_H_
8 
9 #include <tables_csum.h>
10 
11 #define ROM_TABLE_ADDR	CONFIG_ROM_TABLE_ADDR
12 #define ROM_TABLE_END	(CONFIG_ROM_TABLE_ADDR + CONFIG_ROM_TABLE_SIZE - 1)
13 
14 #define ROM_TABLE_ALIGN	1024
15 
16 /* SeaBIOS expects coreboot tables at address range 0x0000-0x1000 */
17 #define CB_TABLE_ADDR	0x800
18 
19 /**
20  * table_compute_checksum() - Compute a table checksum
21  *
22  * This computes an 8-bit checksum for the configuration table.
23  * All bytes in the configuration table, including checksum itself and
24  * reserved bytes must add up to zero.
25  *
26  * @v:		configuration table base address
27  * @len:	configuration table size
28  * @return:	the 8-bit checksum
29  */
30 u8 table_compute_checksum(void *v, int len);
31 
32 /**
33  * table_fill_string() - Fill a string with pad in the configuration table
34  *
35  * This fills a string in the configuration table. It copies number of bytes
36  * from the source string, and if source string length is shorter than the
37  * required size to copy, pad the table string with the given pad character.
38  *
39  * @dest:	where to fill a string
40  * @src:	where to copy from
41  * @n:		number of bytes to copy
42  * @pad:	character to pad the remaining bytes
43  */
44 void table_fill_string(char *dest, const char *src, size_t n, char pad);
45 
46 /**
47  * write_tables() - Write x86 configuration tables
48  *
49  * This writes x86 configuration tables, including PIRQ routing table,
50  * Multi-Processor table and ACPI table. Whether a specific type of
51  * configuration table is written is controlled by a Kconfig option.
52  */
53 void write_tables(void);
54 
55 /**
56  * write_pirq_routing_table() - Write PIRQ routing table
57  *
58  * This writes PIRQ routing table at a given address.
59  *
60  * @start:	start address to write PIRQ routing table
61  * @return:	end address of PIRQ routing table
62  */
63 ulong write_pirq_routing_table(ulong start);
64 
65 #endif /* _X86_TABLES_H_ */
66