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
18 #define ROM_TABLE_END 0xfffff
20 #define ROM_TABLE_ALIGN 1024
22 /* SeaBIOS expects coreboot tables at address range 0x0000-0x1000 */
23 #define CB_TABLE_ADDR 0x800
26 * table_compute_checksum() - Compute a table checksum
28 * This computes an 8-bit checksum for the configuration table.
29 * All bytes in the configuration table, including checksum itself and
30 * reserved bytes must add up to zero.
32 * @v: configuration table base address
33 * @len: configuration table size
34 * @return: the 8-bit checksum
36 u8 table_compute_checksum(void *v, int len);
39 * table_fill_string() - Fill a string with pad in the configuration table
41 * This fills a string in the configuration table. It copies number of bytes
42 * from the source string, and if source string length is shorter than the
43 * required size to copy, pad the table string with the given pad character.
45 * @dest: where to fill a string
46 * @src: where to copy from
47 * @n: number of bytes to copy
48 * @pad: character to pad the remaining bytes
50 void table_fill_string(char *dest, const char *src, size_t n, char pad);
53 * write_tables() - Write x86 configuration tables
55 * This writes x86 configuration tables, including PIRQ routing table,
56 * Multi-Processor table and ACPI table. Whether a specific type of
57 * configuration table is written is controlled by a Kconfig option.
59 void write_tables(void);
62 * write_pirq_routing_table() - Write PIRQ routing table
64 * This writes PIRQ routing table at a given address.
66 * @start: start address to write PIRQ routing table
67 * @return: end address of PIRQ routing table
69 ulong write_pirq_routing_table(ulong start);
71 #endif /* _X86_TABLES_H_ */