| Bin Meng | f17cea6 | 2015-04-24 18:10:04 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0+ |
| 5 | */ |
| 6 | |
| 7 | #ifndef _X86_TABLES_H_ |
| 8 | #define _X86_TABLES_H_ |
| 9 | |
| 10 | /* |
| 11 | * All x86 tables happen to like the address range from 0xf0000 to 0x100000. |
| 12 | * We use 0xf0000 as the starting address to store those tables, including |
| 13 | * PIRQ routing table, Multi-Processor table and ACPI table. |
| 14 | */ |
| 15 | #define ROM_TABLE_ADDR 0xf0000 |
| 16 | |
| 17 | /** |
| 18 | * table_compute_checksum() - Compute a table checksum |
| 19 | * |
| 20 | * This computes an 8-bit checksum for the configuration table. |
| 21 | * All bytes in the configuration table, including checksum itself and |
| 22 | * reserved bytes must add up to zero. |
| 23 | * |
| 24 | * @v: configuration table base address |
| 25 | * @len: configuration table size |
| 26 | * @return: the 8-bit checksum |
| 27 | */ |
| 28 | u8 table_compute_checksum(void *v, int len); |
| 29 | |
| 30 | /** |
| 31 | * write_tables() - Write x86 configuration tables |
| 32 | * |
| 33 | * This writes x86 configuration tables, including PIRQ routing table, |
| 34 | * Multi-Processor table and ACPI table. Whether a specific type of |
| 35 | * configuration table is written is controlled by a Kconfig option. |
| 36 | */ |
| 37 | void write_tables(void); |
| 38 | |
| 39 | /** |
| 40 | * write_pirq_routing_table() - Write PIRQ routing table |
| 41 | * |
| 42 | * This writes PIRQ routing table at a given address. |
| 43 | * |
| 44 | * @start: start address to write PIRQ routing table |
| 45 | * @return: end address of PIRQ routing table |
| 46 | */ |
| 47 | u32 write_pirq_routing_table(u32 start); |
| 48 | |
| 49 | #endif /* _X86_TABLES_H_ */ |