2 * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
4 * SPDX-License-Identifier: GPL-2.0+
10 #include <tables_csum.h>
13 * All x86 tables happen to like the address range from 0xf0000 to 0x100000.
14 * We use 0xf0000 as the starting address to store those tables, including
15 * PIRQ routing table, Multi-Processor table and ACPI table.
17 #define ROM_TABLE_ADDR 0xf0000
19 #define ROM_TABLE_ALIGN 1024
21 /* SeaBIOS expects coreboot tables at address range 0x0000-0x1000 */
22 #define CB_TABLE_ADDR 0x800
25 * table_compute_checksum() - Compute a table checksum
27 * This computes an 8-bit checksum for the configuration table.
28 * All bytes in the configuration table, including checksum itself and
29 * reserved bytes must add up to zero.
31 * @v: configuration table base address
32 * @len: configuration table size
33 * @return: the 8-bit checksum
35 u8 table_compute_checksum(void *v, int len);
38 * table_fill_string() - Fill a string with pad in the configuration table
40 * This fills a string in the configuration table. It copies number of bytes
41 * from the source string, and if source string length is shorter than the
42 * required size to copy, pad the table string with the given pad character.
44 * @dest: where to fill a string
45 * @src: where to copy from
46 * @n: number of bytes to copy
47 * @pad: character to pad the remaining bytes
49 void table_fill_string(char *dest, const char *src, size_t n, char pad);
52 * write_tables() - Write x86 configuration tables
54 * This writes x86 configuration tables, including PIRQ routing table,
55 * Multi-Processor table and ACPI table. Whether a specific type of
56 * configuration table is written is controlled by a Kconfig option.
58 void write_tables(void);
61 * write_pirq_routing_table() - Write PIRQ routing table
63 * This writes PIRQ routing table at a given address.
65 * @start: start address to write PIRQ routing table
66 * @return: end address of PIRQ routing table
68 ulong write_pirq_routing_table(ulong start);
70 #endif /* _X86_TABLES_H_ */