Tegra: Support for Tegra's T132 platforms
This patch implements support for T132 (Denver CPU) based Tegra
platforms.
The following features have been added:
* SiP calls to switch T132 CPU's AARCH mode
* Complete PSCI support, including 'System Suspend'
* Platform specific MMIO settings
* Locking of CPU vector registers
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
diff --git a/plat/nvidia/tegra/soc/t132/plat_psci_handlers.c b/plat/nvidia/tegra/soc/t132/plat_psci_handlers.c
new file mode 100644
index 0000000..79e9f1c
--- /dev/null
+++ b/plat/nvidia/tegra/soc/t132/plat_psci_handlers.c
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <arch.h>
+#include <arch_helpers.h>
+#include <assert.h>
+#include <denver.h>
+#include <debug.h>
+#include <flowctrl.h>
+#include <mmio.h>
+#include <platform_def.h>
+#include <pmc.h>
+#include <psci.h>
+#include <tegra_def.h>
+#include <tegra_private.h>
+
+/*
+ * Register used to clear CPU reset signals. Each CPU has two reset
+ * signals: CPU reset (3:0) and Core reset (19:16)
+ */
+#define CPU_CMPLX_RESET_CLR 0x344
+#define CPU_CORE_RESET_MASK 0x10001
+
+static int cpu_powergate_mask[PLATFORM_MAX_CPUS_PER_CLUSTER];
+
+int32_t tegra_soc_validate_power_state(unsigned int power_state)
+{
+ /* Sanity check the requested afflvl */
+ if (psci_get_pstate_type(power_state) == PSTATE_TYPE_STANDBY) {
+ /*
+ * It's possible to enter standby only on affinity level 0 i.e.
+ * a cpu on Tegra. Ignore any other affinity level.
+ */
+ if (psci_get_pstate_afflvl(power_state) != MPIDR_AFFLVL0)
+ return PSCI_E_INVALID_PARAMS;
+ }
+
+ /* Sanity check the requested state id */
+ if (psci_get_pstate_id(power_state) != PLAT_SYS_SUSPEND_STATE_ID) {
+ ERROR("unsupported state id\n");
+ return PSCI_E_NOT_SUPPORTED;
+ }
+
+ return PSCI_E_SUCCESS;
+}
+
+int tegra_soc_prepare_cpu_on(unsigned long mpidr)
+{
+ int cpu = mpidr & MPIDR_CPU_MASK;
+ uint32_t mask = CPU_CORE_RESET_MASK << cpu;
+
+ if (cpu_powergate_mask[cpu] == 0) {
+
+ /* Deassert CPU reset signals */
+ mmio_write_32(TEGRA_CAR_RESET_BASE + CPU_CMPLX_RESET_CLR, mask);
+
+ /* Power on CPU using PMC */
+ tegra_pmc_cpu_on(cpu);
+
+ /* Fill in the CPU powergate mask */
+ cpu_powergate_mask[cpu] = 1;
+
+ } else {
+ /* Power on CPU using Flow Controller */
+ tegra_fc_cpu_on(cpu);
+ }
+
+ return PSCI_E_SUCCESS;
+}
+
+int tegra_soc_prepare_cpu_off(unsigned long mpidr)
+{
+ tegra_fc_cpu_off(mpidr & MPIDR_CPU_MASK);
+ return PSCI_E_SUCCESS;
+}
+
+int tegra_soc_prepare_cpu_suspend(unsigned int id, unsigned int afflvl)
+{
+ /* Nothing to be done for lower affinity levels */
+ if (afflvl < MPIDR_AFFLVL2)
+ return PSCI_E_SUCCESS;
+
+ /* Enter system suspend state */
+ tegra_pm_system_suspend_entry();
+
+ /* Allow restarting CPU #1 using PMC on suspend exit */
+ cpu_powergate_mask[1] = 0;
+
+ /* Program FC to enter suspend state */
+ tegra_fc_cpu_idle(read_mpidr());
+
+ /* Suspend DCO operations */
+ write_actlr_el1(id);
+
+ return PSCI_E_SUCCESS;
+}
diff --git a/plat/nvidia/tegra/soc/t132/plat_secondary.c b/plat/nvidia/tegra/soc/t132/plat_secondary.c
new file mode 100644
index 0000000..744dcb7
--- /dev/null
+++ b/plat/nvidia/tegra/soc/t132/plat_secondary.c
@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <arch_helpers.h>
+#include <assert.h>
+#include <debug.h>
+#include <denver.h>
+#include <mmio.h>
+#include <platform.h>
+#include <psci.h>
+#include <pmc.h>
+#include <tegra_def.h>
+
+#define SB_CSR 0x0
+#define SB_CSR_NS_RST_VEC_WR_DIS (1 << 1)
+
+/* AARCH64 CPU reset vector */
+#define SB_AA64_RESET_LOW 0x30 /* width = 31:0 */
+#define SB_AA64_RESET_HI 0x34 /* width = 11:0 */
+
+/* AARCH32 CPU reset vector */
+#define EVP_CPU_RESET_VECTOR 0x100
+
+extern void tegra_secure_entrypoint(void);
+
+/*
+ * For T132, CPUs reset to AARCH32, so the reset vector is first
+ * armv8_trampoline which does a warm reset to AARCH64 and starts
+ * execution at the address in SB_AA64_RESET_LOW/SB_AA64_RESET_HI.
+ */
+__aligned(8) const uint32_t armv8_trampoline[] = {
+ 0xE3A00003, /* mov r0, #3 */
+ 0xEE0C0F50, /* mcr p15, 0, r0, c12, c0, 2 */
+ 0xEAFFFFFE, /* b . */
+};
+
+/*******************************************************************************
+ * Setup secondary CPU vectors
+ ******************************************************************************/
+void plat_secondary_setup(void)
+{
+ uint32_t val;
+ uint64_t reset_addr = (uint64_t)tegra_secure_entrypoint;
+
+ /*
+ * For T132, CPUs reset to AARCH32, so the reset vector is first
+ * armv8_trampoline, which does a warm reset to AARCH64 and starts
+ * execution at the address in SCRATCH34/SCRATCH35.
+ */
+ INFO("Setting up T132 CPU boot\n");
+
+ /* initial AARCH32 reset address */
+ tegra_pmc_write_32(PMC_SECURE_SCRATCH22,
+ (unsigned long)&armv8_trampoline);
+
+ /* set AARCH32 exception vector (read to flush) */
+ mmio_write_32(TEGRA_EVP_BASE + EVP_CPU_RESET_VECTOR,
+ (unsigned long)&armv8_trampoline);
+ val = mmio_read_32(TEGRA_EVP_BASE + EVP_CPU_RESET_VECTOR);
+
+ /* setup secondary CPU vector */
+ mmio_write_32(TEGRA_SB_BASE + SB_AA64_RESET_LOW,
+ (reset_addr & 0xFFFFFFFF) | 1);
+ val = reset_addr >> 32;
+ mmio_write_32(TEGRA_SB_BASE + SB_AA64_RESET_HI, val & 0x7FF);
+
+ /* configure PMC */
+ tegra_pmc_cpu_setup(reset_addr);
+ tegra_pmc_lock_cpu_vectors();
+}
diff --git a/plat/nvidia/tegra/soc/t132/plat_setup.c b/plat/nvidia/tegra/soc/t132/plat_setup.c
new file mode 100644
index 0000000..a76999c
--- /dev/null
+++ b/plat/nvidia/tegra/soc/t132/plat_setup.c
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <xlat_tables.h>
+#include <tegra_def.h>
+
+/* sets of MMIO ranges setup */
+#define MMIO_RANGE_0_ADDR 0x50000000
+#define MMIO_RANGE_1_ADDR 0x60000000
+#define MMIO_RANGE_2_ADDR 0x70000000
+#define MMIO_RANGE_SIZE 0x200000
+
+/*
+ * Table of regions to map using the MMU.
+ */
+static const mmap_region_t tegra_mmap[] = {
+ MAP_REGION_FLAT(MMIO_RANGE_0_ADDR, MMIO_RANGE_SIZE,
+ MT_DEVICE | MT_RW | MT_SECURE),
+ MAP_REGION_FLAT(MMIO_RANGE_1_ADDR, MMIO_RANGE_SIZE,
+ MT_DEVICE | MT_RW | MT_SECURE),
+ MAP_REGION_FLAT(MMIO_RANGE_2_ADDR, MMIO_RANGE_SIZE,
+ MT_DEVICE | MT_RW | MT_SECURE),
+ {0}
+};
+
+/*******************************************************************************
+ * Set up the pagetables as per the platform memory map & initialize the MMU
+ ******************************************************************************/
+const mmap_region_t *plat_get_mmio_map(void)
+{
+ /* MMIO space */
+ return tegra_mmap;
+}
+
+uint64_t plat_get_syscnt_freq(void)
+{
+ return 12000000;
+}
diff --git a/plat/nvidia/tegra/soc/t132/platform_t132.mk b/plat/nvidia/tegra/soc/t132/platform_t132.mk
new file mode 100644
index 0000000..1be13e9
--- /dev/null
+++ b/plat/nvidia/tegra/soc/t132/platform_t132.mk
@@ -0,0 +1,46 @@
+#
+# Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# Redistributions of source code must retain the above copyright notice, this
+# list of conditions and the following disclaimer.
+#
+# Redistributions in binary form must reproduce the above copyright notice,
+# this list of conditions and the following disclaimer in the documentation
+# and/or other materials provided with the distribution.
+#
+# Neither the name of ARM nor the names of its contributors may be used
+# to endorse or promote products derived from this software without specific
+# prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+
+TEGRA_BOOT_UART_BASE := 0x70006300
+$(eval $(call add_define,TEGRA_BOOT_UART_BASE))
+
+TZDRAM_BASE := 0xF1C00000
+$(eval $(call add_define,TZDRAM_BASE))
+
+PLATFORM_CLUSTER_COUNT := 1
+$(eval $(call add_define,PLATFORM_CLUSTER_COUNT))
+
+PLATFORM_MAX_CPUS_PER_CLUSTER := 2
+$(eval $(call add_define,PLATFORM_MAX_CPUS_PER_CLUSTER))
+
+BL31_SOURCES += lib/cpus/aarch64/denver.S \
+ ${SOC_DIR}/plat_psci_handlers.c \
+ ${SOC_DIR}/plat_setup.c \
+ ${SOC_DIR}/plat_secondary.c