arm64: versal: Add support for new Xilinx Versal ACAPs
Xilinx is introducing Versal, an adaptive compute acceleration platform
(ACAP), built on 7nm FinFET process technology. Versal ACAPs combine Scalar
Processing Engines, Adaptable Hardware Engines, and Intelligent Engines with
leading-edge memory and interfacing technologies to deliver powerful
heterogeneous acceleration for any application. The Versal AI Core series has
five devices, offering 128 to 400 AI Engines. The series includes dual-core Arm
Cortex-A72 application processors, dual-core Arm Cortex-R5 real-time
processors, 256KB of on-chip memory with ECC, more than 1,900 DSP engines
optimized for high-precision floating point with low latency.
This patch adds Virtual QEMU platform support for
this SoC "versal_virt".
Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/plat/xilinx/versal/versal_gicv3.c b/plat/xilinx/versal/versal_gicv3.c
new file mode 100644
index 0000000..72374b5
--- /dev/null
+++ b/plat/xilinx/versal/versal_gicv3.c
@@ -0,0 +1,185 @@
+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <gicv3.h>
+#include <interrupt_props.h>
+#include <platform.h>
+#include <platform_def.h>
+#include <utils.h>
+#include "versal_private.h"
+
+/******************************************************************************
+ * The following functions are defined as weak to allow a platform to override
+ * the way the GICv3 driver is initialised and used.
+ *****************************************************************************/
+#pragma weak plat_versal_gic_driver_init
+#pragma weak plat_versal_gic_init
+#pragma weak plat_versal_gic_cpuif_enable
+#pragma weak plat_versal_gic_cpuif_disable
+#pragma weak plat_versal_gic_pcpu_init
+#pragma weak plat_versal_gic_redistif_on
+#pragma weak plat_versal_gic_redistif_off
+
+/* The GICv3 driver only needs to be initialized in EL3 */
+static uintptr_t rdistif_base_addrs[PLATFORM_CORE_COUNT];
+
+static const interrupt_prop_t versal_interrupt_props[] = {
+ PLAT_VERSAL_G1S_IRQ_PROPS(INTR_GROUP1S),
+ PLAT_VERSAL_G0_IRQ_PROPS(INTR_GROUP0)
+};
+
+/*
+ * We save and restore the GICv3 context on system suspend. Allocate the
+ * data in the designated EL3 Secure carve-out memory.
+ */
+static gicv3_redist_ctx_t rdist_ctx __section("versal_el3_tzc_dram");
+static gicv3_dist_ctx_t dist_ctx __section("versal_el3_tzc_dram");
+
+/*
+ * MPIDR hashing function for translating MPIDRs read from GICR_TYPER register
+ * to core position.
+ *
+ * Calculating core position is dependent on MPIDR_EL1.MT bit. However, affinity
+ * values read from GICR_TYPER don't have an MT field. To reuse the same
+ * translation used for CPUs, we insert MT bit read from the PE's MPIDR into
+ * that read from GICR_TYPER.
+ *
+ * Assumptions:
+ *
+ * - All CPUs implemented in the system have MPIDR_EL1.MT bit set;
+ * - No CPUs implemented in the system use affinity level 3.
+ */
+static unsigned int versal_gicv3_mpidr_hash(u_register_t mpidr)
+{
+ mpidr |= (read_mpidr_el1() & MPIDR_MT_MASK);
+ return versal_calc_core_pos(mpidr);
+}
+
+static const gicv3_driver_data_t versal_gic_data __unused = {
+ .gicd_base = PLAT_VERSAL_GICD_BASE,
+ .gicr_base = PLAT_VERSAL_GICR_BASE,
+ .interrupt_props = versal_interrupt_props,
+ .interrupt_props_num = ARRAY_SIZE(versal_interrupt_props),
+ .rdistif_num = PLATFORM_CORE_COUNT,
+ .rdistif_base_addrs = rdistif_base_addrs,
+ .mpidr_to_core_pos = versal_gicv3_mpidr_hash
+};
+
+void __init plat_versal_gic_driver_init(void)
+{
+ /*
+ * The GICv3 driver is initialized in EL3 and does not need
+ * to be initialized again in SEL1. This is because the S-EL1
+ * can use GIC system registers to manage interrupts and does
+ * not need GIC interface base addresses to be configured.
+ */
+#if IMAGE_BL31
+ gicv3_driver_init(&versal_gic_data);
+#endif
+}
+
+/******************************************************************************
+ * Versal common helper to initialize the GIC. Only invoked by BL31
+ *****************************************************************************/
+void __init plat_versal_gic_init(void)
+{
+ gicv3_distif_init();
+ gicv3_rdistif_init(plat_my_core_pos());
+ gicv3_cpuif_enable(plat_my_core_pos());
+}
+
+/******************************************************************************
+ * Versal common helper to enable the GIC CPU interface
+ *****************************************************************************/
+void plat_versal_gic_cpuif_enable(void)
+{
+ gicv3_cpuif_enable(plat_my_core_pos());
+}
+
+/******************************************************************************
+ * Versal common helper to disable the GIC CPU interface
+ *****************************************************************************/
+void plat_versal_gic_cpuif_disable(void)
+{
+ gicv3_cpuif_disable(plat_my_core_pos());
+}
+
+/******************************************************************************
+ * Versal common helper to initialize the per-cpu redistributor interface in
+ * GICv3
+ *****************************************************************************/
+void plat_versal_gic_pcpu_init(void)
+{
+ gicv3_rdistif_init(plat_my_core_pos());
+}
+
+/******************************************************************************
+ * Versal common helpers to power GIC redistributor interface
+ *****************************************************************************/
+void plat_versal_gic_redistif_on(void)
+{
+ gicv3_rdistif_on(plat_my_core_pos());
+}
+
+void plat_versal_gic_redistif_off(void)
+{
+ gicv3_rdistif_off(plat_my_core_pos());
+}
+
+/******************************************************************************
+ * Versal common helper to save & restore the GICv3 on resume from system
+ * suspend
+ *****************************************************************************/
+void plat_versal_gic_save(void)
+{
+ /*
+ * If an ITS is available, save its context before
+ * the Redistributor using:
+ * gicv3_its_save_disable(gits_base, &its_ctx[i])
+ * Additionnaly, an implementation-defined sequence may
+ * be required to save the whole ITS state.
+ */
+
+ /*
+ * Save the GIC Redistributors and ITS contexts before the
+ * Distributor context. As we only handle SYSTEM SUSPEND API,
+ * we only need to save the context of the CPU that is issuing
+ * the SYSTEM SUSPEND call, i.e. the current CPU.
+ */
+ gicv3_rdistif_save(plat_my_core_pos(), &rdist_ctx);
+
+ /* Save the GIC Distributor context */
+ gicv3_distif_save(&dist_ctx);
+
+ /*
+ * From here, all the components of the GIC can be safely powered down
+ * as long as there is an alternate way to handle wakeup interrupt
+ * sources.
+ */
+}
+
+void plat_versal_gic_resume(void)
+{
+ /* Restore the GIC Distributor context */
+ gicv3_distif_init_restore(&dist_ctx);
+
+ /*
+ * Restore the GIC Redistributor and ITS contexts after the
+ * Distributor context. As we only handle SYSTEM SUSPEND API,
+ * we only need to restore the context of the CPU that issued
+ * the SYSTEM SUSPEND call.
+ */
+ gicv3_rdistif_init_restore(plat_my_core_pos(), &rdist_ctx);
+
+ /*
+ * If an ITS is available, restore its context after
+ * the Redistributor using:
+ * gicv3_its_restore(gits_base, &its_ctx[i])
+ * An implementation-defined sequence may be required to
+ * restore the whole ITS state. The ITS must also be
+ * re-enabled after this sequence has been executed.
+ */
+}