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Diffstat (limited to 'arch/x86/include/asm/tables.h')
-rw-r--r-- | arch/x86/include/asm/tables.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/x86/include/asm/tables.h b/arch/x86/include/asm/tables.h new file mode 100644 index 0000000..8146ba3 --- /dev/null +++ b/arch/x86/include/asm/tables.h @@ -0,0 +1,49 @@ +/* + * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _X86_TABLES_H_ +#define _X86_TABLES_H_ + +/* + * All x86 tables happen to like the address range from 0xf0000 to 0x100000. + * We use 0xf0000 as the starting address to store those tables, including + * PIRQ routing table, Multi-Processor table and ACPI table. + */ +#define ROM_TABLE_ADDR 0xf0000 + +/** + * table_compute_checksum() - Compute a table checksum + * + * This computes an 8-bit checksum for the configuration table. + * All bytes in the configuration table, including checksum itself and + * reserved bytes must add up to zero. + * + * @v: configuration table base address + * @len: configuration table size + * @return: the 8-bit checksum + */ +u8 table_compute_checksum(void *v, int len); + +/** + * write_tables() - Write x86 configuration tables + * + * This writes x86 configuration tables, including PIRQ routing table, + * Multi-Processor table and ACPI table. Whether a specific type of + * configuration table is written is controlled by a Kconfig option. + */ +void write_tables(void); + +/** + * write_pirq_routing_table() - Write PIRQ routing table + * + * This writes PIRQ routing table at a given address. + * + * @start: start address to write PIRQ routing table + * @return: end address of PIRQ routing table + */ +u32 write_pirq_routing_table(u32 start); + +#endif /* _X86_TABLES_H_ */ |