89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
/*
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* Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <arch.h>
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#include <assert.h>
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#include <cci400.h>
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#include <debug.h>
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#include <mmio.h>
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#include <stdint.h>
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#define MAX_CLUSTERS 2
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static uintptr_t cci_base_addr;
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static unsigned int cci_cluster_ix_to_iface[MAX_CLUSTERS];
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void cci_init(uintptr_t cci_base,
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int slave_iface3_cluster_ix,
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int slave_iface4_cluster_ix)
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{
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/*
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* Check the passed arguments are valid. The cluster indices must be
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* less than MAX_CLUSTERS, not the same as each other and at least one
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* of them must refer to a valid cluster index.
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*/
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assert(cci_base);
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assert(slave_iface3_cluster_ix < MAX_CLUSTERS);
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assert(slave_iface4_cluster_ix < MAX_CLUSTERS);
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assert(slave_iface3_cluster_ix != slave_iface4_cluster_ix);
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assert((slave_iface3_cluster_ix >= 0) ||
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(slave_iface4_cluster_ix >= 0));
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WARN("Please migrate to common cci driver, This driver will be" \
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" deprecated in future\n");
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cci_base_addr = cci_base;
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if (slave_iface3_cluster_ix >= 0)
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cci_cluster_ix_to_iface[slave_iface3_cluster_ix] =
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SLAVE_IFACE3_OFFSET;
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if (slave_iface4_cluster_ix >= 0)
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cci_cluster_ix_to_iface[slave_iface4_cluster_ix] =
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SLAVE_IFACE4_OFFSET;
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}
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static inline unsigned long get_slave_iface_base(unsigned long mpidr)
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{
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/*
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* We assume the TF topology code allocates affinity instances
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* consecutively from zero.
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* It is a programming error if this is called without initializing
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* the slave interface to use for this cluster.
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*/
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unsigned int cluster_id =
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(mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK;
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assert(cluster_id < MAX_CLUSTERS);
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assert(cci_cluster_ix_to_iface[cluster_id] != 0);
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return cci_base_addr + cci_cluster_ix_to_iface[cluster_id];
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}
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void cci_enable_cluster_coherency(unsigned long mpidr)
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{
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assert(cci_base_addr);
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/* Enable Snoops and DVM messages */
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mmio_write_32(get_slave_iface_base(mpidr) + SNOOP_CTRL_REG,
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DVM_EN_BIT | SNOOP_EN_BIT);
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/* Wait for the dust to settle down */
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while (mmio_read_32(cci_base_addr + STATUS_REG) & CHANGE_PENDING_BIT)
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;
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}
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void cci_disable_cluster_coherency(unsigned long mpidr)
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{
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assert(cci_base_addr);
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/* Disable Snoops and DVM messages */
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mmio_write_32(get_slave_iface_base(mpidr) + SNOOP_CTRL_REG,
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~(DVM_EN_BIT | SNOOP_EN_BIT));
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/* Wait for the dust to settle down */
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while (mmio_read_32(cci_base_addr + STATUS_REG) & CHANGE_PENDING_BIT)
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;
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}
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