mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-13 08:27:23 +00:00
bd47209743
This driver handles communication with the systemagent which needs to be told when U-Boot has completed its init. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
23 lines
614 B
C
23 lines
614 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (C) 2017 Intel Corporation.
|
|
* Take from coreboot project file of the same name
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/intel_regs.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/systemagent.h>
|
|
|
|
void enable_bios_reset_cpl(void)
|
|
{
|
|
/*
|
|
* Set bits 0+1 of BIOS_RESET_CPL to indicate to the CPU
|
|
* that BIOS has initialised memory and power management
|
|
*
|
|
* The FSP-S does not do this. If we leave this as zero then I believe
|
|
* the power-aware interrupts don't work in Linux, and CPU 0 always gets
|
|
* the interrupt.
|
|
*/
|
|
setbits_8(MCHBAR_REG(BIOS_RESET_CPL), 3);
|
|
}
|