u-boot/arch/x86/lib/tables.c
Simon Glass 6388e35725 x86: Add support for the Simple Firmware Interface (SFI)
This provides a way of passing information to Linux without requiring the
full ACPI horror. Provide a rudimentary implementation sufficient to be
recognised and parsed by Linux.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2015-04-29 21:02:33 -06:00

35 lines
688 B
C

/*
* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/sfi.h>
#include <asm/tables.h>
u8 table_compute_checksum(void *v, int len)
{
u8 *bytes = v;
u8 checksum = 0;
int i;
for (i = 0; i < len; i++)
checksum -= bytes[i];
return checksum;
}
void write_tables(void)
{
u32 __maybe_unused rom_table_end = ROM_TABLE_ADDR;
#ifdef CONFIG_GENERATE_PIRQ_TABLE
rom_table_end = write_pirq_routing_table(rom_table_end);
rom_table_end = ALIGN(rom_table_end, 1024);
#endif
#ifdef CONFIG_GENERATE_SFI_TABLE
rom_table_end = write_sfi_table(rom_table_end);
rom_table_end = ALIGN(rom_table_end, 1024);
#endif
}