[Feature] add GA346 baseline version
Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/arch/arm/mach-actions/Kconfig b/src/kernel/linux/v4.19/arch/arm/mach-actions/Kconfig
new file mode 100644
index 0000000..b5e0ac9
--- /dev/null
+++ b/src/kernel/linux/v4.19/arch/arm/mach-actions/Kconfig
@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: GPL-2.0
+menuconfig ARCH_ACTIONS
+ bool "Actions Semi SoCs"
+ depends on ARCH_MULTI_V7
+ select ARM_AMBA
+ select ARM_GIC
+ select ARM_GLOBAL_TIMER
+ select CACHE_L2X0
+ select CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
+ select COMMON_CLK
+ select GENERIC_IRQ_CHIP
+ select HAVE_ARM_SCU if SMP
+ select HAVE_ARM_TWD if SMP
+ select OWL_PM_DOMAINS_HELPER
+ select OWL_TIMER
+ help
+ This enables support for the Actions Semiconductor S500 SoC family.
diff --git a/src/kernel/linux/v4.19/arch/arm/mach-actions/Makefile b/src/kernel/linux/v4.19/arch/arm/mach-actions/Makefile
new file mode 100644
index 0000000..1383103
--- /dev/null
+++ b/src/kernel/linux/v4.19/arch/arm/mach-actions/Makefile
@@ -0,0 +1 @@
+obj-${CONFIG_SMP} += platsmp.o
diff --git a/src/kernel/linux/v4.19/arch/arm/mach-actions/platsmp.c b/src/kernel/linux/v4.19/arch/arm/mach-actions/platsmp.c
new file mode 100644
index 0000000..3efaa10
--- /dev/null
+++ b/src/kernel/linux/v4.19/arch/arm/mach-actions/platsmp.c
@@ -0,0 +1,171 @@
+/*
+ * Actions Semi Leopard
+ *
+ * This file is based on arm realview smp platform.
+ *
+ * Copyright 2012 Actions Semi Inc.
+ * Author: Actions Semi, Inc.
+ *
+ * Copyright (c) 2017 Andreas Färber
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/smp.h>
+#include <linux/soc/actions/owl-sps.h>
+#include <asm/cacheflush.h>
+#include <asm/smp_plat.h>
+#include <asm/smp_scu.h>
+
+#define OWL_CPU1_ADDR 0x50
+#define OWL_CPU1_FLAG 0x5c
+
+#define OWL_CPUx_FLAG_BOOT 0x55aa
+
+#define OWL_SPS_PG_CTL_PWR_CPU2 BIT(5)
+#define OWL_SPS_PG_CTL_PWR_CPU3 BIT(6)
+#define OWL_SPS_PG_CTL_ACK_CPU2 BIT(21)
+#define OWL_SPS_PG_CTL_ACK_CPU3 BIT(22)
+
+static void __iomem *scu_base_addr;
+static void __iomem *sps_base_addr;
+static void __iomem *timer_base_addr;
+static int ncores;
+
+static DEFINE_SPINLOCK(boot_lock);
+
+void owl_secondary_startup(void);
+
+static int s500_wakeup_secondary(unsigned int cpu)
+{
+ int ret;
+
+ if (cpu > 3)
+ return -EINVAL;
+
+ /* The generic PM domain driver is not available this early. */
+ switch (cpu) {
+ case 2:
+ ret = owl_sps_set_pg(sps_base_addr,
+ OWL_SPS_PG_CTL_PWR_CPU2,
+ OWL_SPS_PG_CTL_ACK_CPU2, true);
+ if (ret)
+ return ret;
+ break;
+ case 3:
+ ret = owl_sps_set_pg(sps_base_addr,
+ OWL_SPS_PG_CTL_PWR_CPU3,
+ OWL_SPS_PG_CTL_ACK_CPU3, true);
+ if (ret)
+ return ret;
+ break;
+ }
+
+ /* wait for CPUx to run to WFE instruction */
+ udelay(200);
+
+ writel(__pa_symbol(secondary_startup),
+ timer_base_addr + OWL_CPU1_ADDR + (cpu - 1) * 4);
+ writel(OWL_CPUx_FLAG_BOOT,
+ timer_base_addr + OWL_CPU1_FLAG + (cpu - 1) * 4);
+
+ dsb_sev();
+ mb();
+
+ return 0;
+}
+
+static int s500_smp_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+ unsigned long timeout;
+ int ret;
+
+ ret = s500_wakeup_secondary(cpu);
+ if (ret)
+ return ret;
+
+ udelay(10);
+
+ spin_lock(&boot_lock);
+
+ smp_send_reschedule(cpu);
+
+ timeout = jiffies + (1 * HZ);
+ while (time_before(jiffies, timeout)) {
+ if (pen_release == -1)
+ break;
+ }
+
+ writel(0, timer_base_addr + OWL_CPU1_ADDR + (cpu - 1) * 4);
+ writel(0, timer_base_addr + OWL_CPU1_FLAG + (cpu - 1) * 4);
+
+ spin_unlock(&boot_lock);
+
+ return 0;
+}
+
+static void __init s500_smp_prepare_cpus(unsigned int max_cpus)
+{
+ struct device_node *node;
+
+ node = of_find_compatible_node(NULL, NULL, "actions,s500-timer");
+ if (!node) {
+ pr_err("%s: missing timer\n", __func__);
+ return;
+ }
+
+ timer_base_addr = of_iomap(node, 0);
+ if (!timer_base_addr) {
+ pr_err("%s: could not map timer registers\n", __func__);
+ return;
+ }
+
+ node = of_find_compatible_node(NULL, NULL, "actions,s500-sps");
+ if (!node) {
+ pr_err("%s: missing sps\n", __func__);
+ return;
+ }
+
+ sps_base_addr = of_iomap(node, 0);
+ if (!sps_base_addr) {
+ pr_err("%s: could not map sps registers\n", __func__);
+ return;
+ }
+
+ if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A9) {
+ node = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-scu");
+ if (!node) {
+ pr_err("%s: missing scu\n", __func__);
+ return;
+ }
+
+ scu_base_addr = of_iomap(node, 0);
+ if (!scu_base_addr) {
+ pr_err("%s: could not map scu registers\n", __func__);
+ return;
+ }
+
+ /*
+ * While the number of cpus is gathered from dt, also get the
+ * number of cores from the scu to verify this value when
+ * booting the cores.
+ */
+ ncores = scu_get_core_count(scu_base_addr);
+ pr_debug("%s: ncores %d\n", __func__, ncores);
+
+ scu_enable(scu_base_addr);
+ }
+}
+
+static const struct smp_operations s500_smp_ops __initconst = {
+ .smp_prepare_cpus = s500_smp_prepare_cpus,
+ .smp_boot_secondary = s500_smp_boot_secondary,
+};
+CPU_METHOD_OF_DECLARE(s500_smp, "actions,s500-smp", &s500_smp_ops);