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 #include <tables_csum.h> 11 12 #define ROM_TABLE_ADDR CONFIG_ROM_TABLE_ADDR 13 #define ROM_TABLE_END (CONFIG_ROM_TABLE_ADDR + CONFIG_ROM_TABLE_SIZE - 1) 14 15 #define ROM_TABLE_ALIGN 1024 16 17 /* SeaBIOS expects coreboot tables at address range 0x0000-0x1000 */ 18 #define CB_TABLE_ADDR 0x800 19 20 /** 21 * table_compute_checksum() - Compute a table checksum 22 * 23 * This computes an 8-bit checksum for the configuration table. 24 * All bytes in the configuration table, including checksum itself and 25 * reserved bytes must add up to zero. 26 * 27 * @v: configuration table base address 28 * @len: configuration table size 29 * @return: the 8-bit checksum 30 */ 31 u8 table_compute_checksum(void *v, int len); 32 33 /** 34 * table_fill_string() - Fill a string with pad in the configuration table 35 * 36 * This fills a string in the configuration table. It copies number of bytes 37 * from the source string, and if source string length is shorter than the 38 * required size to copy, pad the table string with the given pad character. 39 * 40 * @dest: where to fill a string 41 * @src: where to copy from 42 * @n: number of bytes to copy 43 * @pad: character to pad the remaining bytes 44 */ 45 void table_fill_string(char *dest, const char *src, size_t n, char pad); 46 47 /** 48 * write_tables() - Write x86 configuration tables 49 * 50 * This writes x86 configuration tables, including PIRQ routing table, 51 * Multi-Processor table and ACPI table. Whether a specific type of 52 * configuration table is written is controlled by a Kconfig option. 53 */ 54 void write_tables(void); 55 56 /** 57 * write_pirq_routing_table() - Write PIRQ routing table 58 * 59 * This writes PIRQ routing table at a given address. 60 * 61 * @start: start address to write PIRQ routing table 62 * @return: end address of PIRQ routing table 63 */ 64 ulong write_pirq_routing_table(ulong start); 65 66 #endif /* _X86_TABLES_H_ */ 67