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 * @return 0 if OK, -ENOSPC if table too large 54 */ 55 int write_tables(void); 56 57 /** 58 * write_pirq_routing_table() - Write PIRQ routing table 59 * 60 * This writes PIRQ routing table at a given address. 61 * 62 * @start: start address to write PIRQ routing table 63 * @return: end address of PIRQ routing table 64 */ 65 ulong write_pirq_routing_table(ulong start); 66 67 #endif /* _X86_TABLES_H_ */ 68