plat/marvell/armada/a8k/common/aarch64/plat_arch_config.c

/*
 * Copyright (C) 2018 Marvell International Ltd.
 *
 * SPDX-License-Identifier:     BSD-3-Clause
 * https://spdx.org/licenses
 */

#include <arch_helpers.h>
#include <common/debug.h>
#include <drivers/marvell/cache_llc.h>
#include <lib/mmio.h>
#include <plat/common/platform.h>

#define CCU_HTC_ASET			(MVEBU_CCU_BASE(MVEBU_AP0) + 0x264)
#define MVEBU_IO_AFFINITY		(0xF00)
#define MVEBU_SF_REG			(MVEBU_REGS_BASE + 0x40)
#define MVEBU_SF_EN			BIT(8)
#define MVEBU_DFX_REG(cluster_id)	(MVEBU_REGS_BASE + 0x6F82A0 + \
					(cluster_id) * 0x4)
#define MVEBU_DFX_CLK_EN_POS		0x3
#define MVEBU_DFX_CL0_CLK_OFFS		16
#define MVEBU_DFX_CL0_CLK_MASK		(0xF << MVEBU_DFX_CL0_CLK_OFFS)
#define MVEBU_DFX_CL1_CLK_OFFS		8
#define MVEBU_DFX_CL1_CLK_MASK		(0xF << MVEBU_DFX_CL1_CLK_OFFS)

#ifdef MVEBU_SOC_AP807
static void plat_enable_snoop_filter(void)
{
	int cpu_id = plat_my_core_pos();

	/* Snoop filter needs to be enabled once per cluster */
	if (cpu_id % 2)
		return;

	mmio_setbits_32(MVEBU_SF_REG, MVEBU_SF_EN);
}
#endif

#ifndef MVEBU_SOC_AP807
static void plat_config_dfx_clock(void)
{
	int cluster_id = plat_my_core_pos();
	uint32_t val;

	/* DFX clock needs to be configured once per cluster */
	if ((cluster_id % PLAT_MAX_CPUS_PER_CLUSTER) != 0) {
		return;
	}

	val = mmio_read_32(MVEBU_DFX_REG(cluster_id / PLAT_MAX_CPUS_PER_CLUSTER));
	if (cluster_id == 0) {
		val &= ~MVEBU_DFX_CL0_CLK_MASK;
		val |= (MVEBU_DFX_CLK_EN_POS << MVEBU_DFX_CL0_CLK_OFFS);
	} else {
		val &= ~MVEBU_DFX_CL1_CLK_MASK;
		val |= (MVEBU_DFX_CLK_EN_POS << MVEBU_DFX_CL1_CLK_OFFS);
	}
	mmio_write_32(MVEBU_DFX_REG(cluster_id / PLAT_MAX_CPUS_PER_CLUSTER), val);
}
#endif

static void plat_enable_affinity(void)
{
	int cluster_id;
	int affinity;

	/* set CPU Affinity */
	cluster_id = plat_my_core_pos() / PLAT_MARVELL_CLUSTER_CORE_COUNT;
	affinity = (MVEBU_IO_AFFINITY | (1 << cluster_id));
	mmio_write_32(CCU_HTC_ASET, affinity);

	/* set barier */
	isb();
}

void marvell_psci_arch_init(int die_index)
{
#if LLC_ENABLE
	/* check if LLC is in exclusive mode
	 * as L2 is configured to UniqueClean eviction
	 * (in a8k reset handler)
	 */
	if (llc_is_exclusive(0) == 0)
		ERROR("LLC should be configured to exclusice mode\n");
#endif

	/* Enable Affinity */
	plat_enable_affinity();

#ifdef MVEBU_SOC_AP807
	plat_enable_snoop_filter();
#else
	plat_config_dfx_clock();
#endif
}