mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-19 16:38:53 +09:00
![Bin Meng](/assets/img/avatar_default.png)
The MP table provides a way for the operating system to support for symmetric multiprocessing as well as symmetric I/O interrupt handling with the local APIC and I/O APIC. We provide a bunch of APIs for U-Boot to write the floating table, configuration table header as well as base and extended table entries. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Simon Glass <sjg@chromium.org>
64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
/*
|
|
* 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);
|
|
|
|
/**
|
|
* table_fill_string() - Fill a string with pad in the configuration table
|
|
*
|
|
* This fills a string in the configuration table. It copies number of bytes
|
|
* from the source string, and if source string length is shorter than the
|
|
* required size to copy, pad the table string with the given pad character.
|
|
*
|
|
* @dest: where to fill a string
|
|
* @src: where to copy from
|
|
* @n: number of bytes to copy
|
|
* @pad: character to pad the remaining bytes
|
|
*/
|
|
void table_fill_string(char *dest, const char *src, size_t n, char pad);
|
|
|
|
/**
|
|
* 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_ */
|