x86: apl: Add systemagent driver

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>
This commit is contained in:
Simon Glass 2019-12-08 17:32:10 -07:00 committed by Bin Meng
parent 070a946008
commit bd47209743
3 changed files with 62 additions and 0 deletions

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@ -2,5 +2,7 @@
# #
# Copyright 2019 Google LLC # Copyright 2019 Google LLC
obj-$(CONFIG_SPL_BUILD) += systemagent.o
obj-y += pmc.o obj-y += pmc.o
obj-y += uart.o obj-y += uart.o

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@ -0,0 +1,23 @@
// 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);
}

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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2017 Intel Corporation.
* Take from coreboot project file of the same name
*/
#ifndef _ASM_ARCH_SYSTEMAGENT_H
#define _ASM_ARCH_SYSTEMAGENT_H
/* Device 0:0.0 PCI configuration space */
#define MCHBAR 0x48
/* RAPL Package Power Limit register under MCHBAR */
#define PUNIT_THERMAL_DEVICE_IRQ 0x700C
#define PUINT_THERMAL_DEVICE_IRQ_VEC_NUMBER 0x18
#define PUINT_THERMAL_DEVICE_IRQ_LOCK 0x80000000
#define BIOS_RESET_CPL 0x7078
#define PCODE_INIT_DONE BIT(8)
#define MCHBAR_RAPL_PPL 0x70A8
#define CORE_DISABLE_MASK 0x7168
#define CAPID0_A 0xE4
#define VTD_DISABLE BIT(23)
#define DEFVTBAR 0x6c80
#define GFXVTBAR 0x6c88
#define VTBAR_ENABLED 0x01
#define VTBAR_MASK GENMASK_ULL(39, 12)
#define VTBAR_SIZE 0x1000
/**
* enable_bios_reset_cpl() - Tell the system agent that memory/power are ready
*
* This should be called when U-Boot has set up the memory and power
* management.
*/
void enable_bios_reset_cpl(void);
#endif