v4.19.13 snapshot.
diff --git a/arch/arm/mach-alpine/Kconfig b/arch/arm/mach-alpine/Kconfig
new file mode 100644
index 0000000..e3cbb07
--- /dev/null
+++ b/arch/arm/mach-alpine/Kconfig
@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: GPL-2.0
+config ARCH_ALPINE
+ bool "Annapurna Labs Alpine platform"
+ depends on ARCH_MULTI_V7
+ select ALPINE_MSI
+ select ARM_AMBA
+ select ARM_GIC
+ select GENERIC_IRQ_CHIP
+ select HAVE_ARM_ARCH_TIMER
+ select HAVE_SMP
+ select MFD_SYSCON
+ select PCI
+ select PCI_HOST_GENERIC
+ help
+ This enables support for the Annapurna Labs Alpine V1 boards.
diff --git a/arch/arm/mach-alpine/Makefile b/arch/arm/mach-alpine/Makefile
new file mode 100644
index 0000000..b667489
--- /dev/null
+++ b/arch/arm/mach-alpine/Makefile
@@ -0,0 +1,2 @@
+obj-y += alpine_machine.o
+obj-$(CONFIG_SMP) += platsmp.o alpine_cpu_pm.o
diff --git a/arch/arm/mach-alpine/alpine_cpu_pm.c b/arch/arm/mach-alpine/alpine_cpu_pm.c
new file mode 100644
index 0000000..121c77c
--- /dev/null
+++ b/arch/arm/mach-alpine/alpine_cpu_pm.c
@@ -0,0 +1,70 @@
+/*
+ * Low-level power-management support for Alpine platform.
+ *
+ * Copyright (C) 2015 Annapurna Labs Ltd.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+
+#include "alpine_cpu_pm.h"
+#include "alpine_cpu_resume.h"
+
+/* NB registers */
+#define AL_SYSFAB_POWER_CONTROL(cpu) (0x2000 + (cpu)*0x100 + 0x20)
+
+static struct regmap *al_sysfabric;
+static struct al_cpu_resume_regs __iomem *al_cpu_resume_regs;
+static int wakeup_supported;
+
+int alpine_cpu_wakeup(unsigned int phys_cpu, uint32_t phys_resume_addr)
+{
+ if (!wakeup_supported)
+ return -ENOSYS;
+
+ /*
+ * Set CPU resume address -
+ * secure firmware running on boot will jump to this address
+ * after setting proper CPU mode, and initialiing e.g. secure
+ * regs (the same mode all CPUs are booted to - usually HYP)
+ */
+ writel(phys_resume_addr,
+ &al_cpu_resume_regs->per_cpu[phys_cpu].resume_addr);
+
+ /* Power-up the CPU */
+ regmap_write(al_sysfabric, AL_SYSFAB_POWER_CONTROL(phys_cpu), 0);
+
+ return 0;
+}
+
+void __init alpine_cpu_pm_init(void)
+{
+ struct device_node *np;
+ uint32_t watermark;
+
+ al_sysfabric = syscon_regmap_lookup_by_compatible("al,alpine-sysfabric-service");
+
+ np = of_find_compatible_node(NULL, NULL, "al,alpine-cpu-resume");
+ al_cpu_resume_regs = of_iomap(np, 0);
+
+ wakeup_supported = !IS_ERR(al_sysfabric) && al_cpu_resume_regs;
+
+ if (wakeup_supported) {
+ watermark = readl(&al_cpu_resume_regs->watermark);
+ wakeup_supported = (watermark & AL_CPU_RESUME_MAGIC_NUM_MASK)
+ == AL_CPU_RESUME_MAGIC_NUM;
+ }
+}
diff --git a/arch/arm/mach-alpine/alpine_cpu_pm.h b/arch/arm/mach-alpine/alpine_cpu_pm.h
new file mode 100644
index 0000000..5179e69
--- /dev/null
+++ b/arch/arm/mach-alpine/alpine_cpu_pm.h
@@ -0,0 +1,26 @@
+/*
+ * Low-level power-management support for Alpine platform.
+ *
+ * Copyright (C) 2015 Annapurna Labs Ltd.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __ALPINE_CPU_PM_H__
+#define __ALPINE_CPU_PM_H__
+
+/* Alpine CPU Power Management Services Initialization */
+void alpine_cpu_pm_init(void);
+
+/* Wake-up a CPU */
+int alpine_cpu_wakeup(unsigned int phys_cpu, uint32_t phys_resume_addr);
+
+#endif /* __ALPINE_CPU_PM_H__ */
diff --git a/arch/arm/mach-alpine/alpine_cpu_resume.h b/arch/arm/mach-alpine/alpine_cpu_resume.h
new file mode 100644
index 0000000..c80150c
--- /dev/null
+++ b/arch/arm/mach-alpine/alpine_cpu_resume.h
@@ -0,0 +1,38 @@
+/*
+ * Annapurna labs cpu-resume register structure.
+ *
+ * Copyright (C) 2015 Annapurna Labs Ltd.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef ALPINE_CPU_RESUME_H_
+#define ALPINE_CPU_RESUME_H_
+
+/* Per-cpu regs */
+struct al_cpu_resume_regs_per_cpu {
+ uint32_t flags;
+ uint32_t resume_addr;
+};
+
+/* general regs */
+struct al_cpu_resume_regs {
+ /* Watermark for validating the CPU resume struct */
+ uint32_t watermark;
+ uint32_t flags;
+ struct al_cpu_resume_regs_per_cpu per_cpu[];
+};
+
+/* The expected magic number for validating the resume addresses */
+#define AL_CPU_RESUME_MAGIC_NUM 0xf0e1d200
+#define AL_CPU_RESUME_MAGIC_NUM_MASK 0xffffff00
+
+#endif /* ALPINE_CPU_RESUME_H_ */
diff --git a/arch/arm/mach-alpine/alpine_machine.c b/arch/arm/mach-alpine/alpine_machine.c
new file mode 100644
index 0000000..b8e2145
--- /dev/null
+++ b/arch/arm/mach-alpine/alpine_machine.c
@@ -0,0 +1,28 @@
+/*
+ * Machine declaration for Alpine platforms.
+ *
+ * Copyright (C) 2015 Annapurna Labs Ltd.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/of_platform.h>
+
+#include <asm/mach/arch.h>
+
+static const char * const al_match[] __initconst = {
+ "al,alpine",
+ NULL,
+};
+
+DT_MACHINE_START(AL_DT, "Annapurna Labs Alpine")
+ .dt_compat = al_match,
+MACHINE_END
diff --git a/arch/arm/mach-alpine/platsmp.c b/arch/arm/mach-alpine/platsmp.c
new file mode 100644
index 0000000..6dc6d49
--- /dev/null
+++ b/arch/arm/mach-alpine/platsmp.c
@@ -0,0 +1,49 @@
+/*
+ * SMP operations for Alpine platform.
+ *
+ * Copyright (C) 2015 Annapurna Labs Ltd.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/of.h>
+
+#include <asm/smp_plat.h>
+
+#include "alpine_cpu_pm.h"
+
+static int alpine_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+ phys_addr_t addr;
+
+ addr = __pa_symbol(secondary_startup);
+
+ if (addr > (phys_addr_t)(uint32_t)(-1)) {
+ pr_err("FAIL: resume address over 32bit (%pa)", &addr);
+ return -EINVAL;
+ }
+
+ return alpine_cpu_wakeup(cpu_logical_map(cpu), (uint32_t)addr);
+}
+
+static void __init alpine_smp_prepare_cpus(unsigned int max_cpus)
+{
+ alpine_cpu_pm_init();
+}
+
+static const struct smp_operations alpine_smp_ops __initconst = {
+ .smp_prepare_cpus = alpine_smp_prepare_cpus,
+ .smp_boot_secondary = alpine_boot_secondary,
+};
+CPU_METHOD_OF_DECLARE(alpine_smp, "al,alpine-smp", &alpine_smp_ops);