v4.19.13 snapshot.
diff --git a/arch/arm/mach-realview/Kconfig b/arch/arm/mach-realview/Kconfig
new file mode 100644
index 0000000..1d7c83e
--- /dev/null
+++ b/arch/arm/mach-realview/Kconfig
@@ -0,0 +1,112 @@
+menuconfig ARCH_REALVIEW
+ bool "ARM Ltd. RealView family"
+ depends on ARCH_MULTI_V5 || ARCH_MULTI_V6 || ARCH_MULTI_V7
+ select ARM_AMBA
+ select ARM_GIC
+ select ARM_TIMER_SP804
+ select CLK_SP810
+ select COMMON_CLK_VERSATILE
+ select GPIO_PL061 if GPIOLIB
+ select HAVE_ARM_SCU if SMP
+ select HAVE_ARM_TWD if SMP
+ select HAVE_PATA_PLATFORM
+ select HAVE_TCM
+ select ICST
+ select MACH_REALVIEW_EB if ARCH_MULTI_V5
+ select MFD_SYSCON
+ select PLAT_VERSATILE
+ select PLAT_VERSATILE_SCHED_CLOCK
+ select POWER_RESET
+ select POWER_RESET_VERSATILE
+ select POWER_SUPPLY
+ select SOC_REALVIEW
+ select USE_OF
+ help
+ This enables support for ARM Ltd RealView boards.
+
+if ARCH_REALVIEW
+
+config MACH_REALVIEW_EB
+ bool "Support RealView(R) Emulation Baseboard"
+ select ARM_GIC
+ select CPU_ARM926T if ARCH_MULTI_V5
+ help
+ Include support for the ARM(R) RealView(R) Emulation Baseboard
+ platform. On an ARMv5 kernel, this will include support for
+ the ARM926EJ-S core tile, while on an ARMv6/v7 kernel, at least
+ one of the ARM1136, ARM1176, ARM11MPCore or Cortex-A9MPCore
+ core tile options should be enabled.
+
+config REALVIEW_EB_ARM1136
+ bool "Support ARM1136J(F)-S Tile"
+ depends on MACH_REALVIEW_EB && ARCH_MULTI_V6
+ select CPU_V6
+ help
+ Enable support for the ARM1136 tile fitted to the
+ Realview(R) Emulation Baseboard platform.
+
+config REALVIEW_EB_ARM1176
+ bool "Support ARM1176JZ(F)-S Tile"
+ depends on MACH_REALVIEW_EB && ARCH_MULTI_V6
+ help
+ Enable support for the ARM1176 tile fitted to the
+ Realview(R) Emulation Baseboard platform.
+
+config REALVIEW_EB_A9MP
+ bool "Support Multicore Cortex-A9 Tile"
+ depends on MACH_REALVIEW_EB && ARCH_MULTI_V7
+ select HAVE_SMP
+ select MIGHT_HAVE_CACHE_L2X0
+ help
+ Enable support for the Cortex-A9MPCore tile fitted to the
+ Realview(R) Emulation Baseboard platform.
+
+config REALVIEW_EB_ARM11MP
+ bool "Support ARM11MPCore Tile"
+ depends on MACH_REALVIEW_EB && ARCH_MULTI_V6
+ select HAVE_SMP
+ select MIGHT_HAVE_CACHE_L2X0
+ help
+ Enable support for the ARM11MPCore tile fitted to the Realview(R)
+ Emulation Baseboard platform.
+
+config MACH_REALVIEW_PB11MP
+ bool "Support RealView(R) Platform Baseboard for ARM11MPCore"
+ depends on ARCH_MULTI_V6
+ select HAVE_SMP
+ select MIGHT_HAVE_CACHE_L2X0
+ help
+ Include support for the ARM(R) RealView(R) Platform Baseboard for
+ the ARM11MPCore. This platform has an on-board ARM11MPCore and has
+ support for PCI-E and Compact Flash.
+
+# ARMv6 CPU without K extensions, but does have the new exclusive ops
+config MACH_REALVIEW_PB1176
+ bool "Support RealView(R) Platform Baseboard for ARM1176JZF-S"
+ depends on ARCH_MULTI_V6
+ select CPU_V6
+ select HAVE_TCM
+ select MIGHT_HAVE_CACHE_L2X0
+ help
+ Include support for the ARM(R) RealView(R) Platform Baseboard for
+ ARM1176JZF-S.
+
+config MACH_REALVIEW_PBA8
+ bool "Support RealView(R) Platform Baseboard for Cortex(tm)-A8 platform"
+ depends on ARCH_MULTI_V7
+ help
+ Include support for the ARM(R) RealView Platform Baseboard for
+ Cortex(tm)-A8. This platform has an on-board Cortex-A8 and has
+ support for PCI-E and Compact Flash.
+
+config MACH_REALVIEW_PBX
+ bool "Support RealView(R) Platform Baseboard Explore for Cortex-A9"
+ depends on ARCH_MULTI_V7
+ select HAVE_SMP
+ select MIGHT_HAVE_CACHE_L2X0
+ select ZONE_DMA
+ help
+ Include support for the ARM(R) RealView(R) Platform Baseboard
+ Explore.
+
+endif
diff --git a/arch/arm/mach-realview/Makefile b/arch/arm/mach-realview/Makefile
new file mode 100644
index 0000000..adf39ad
--- /dev/null
+++ b/arch/arm/mach-realview/Makefile
@@ -0,0 +1,8 @@
+#
+# Makefile for the linux kernel.
+#
+ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := -I$(srctree)/arch/arm/plat-versatile/include
+
+obj-y += realview-dt.o
+obj-$(CONFIG_SMP) += platsmp-dt.o
+obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
diff --git a/arch/arm/mach-realview/hotplug.c b/arch/arm/mach-realview/hotplug.c
new file mode 100644
index 0000000..968e2d1
--- /dev/null
+++ b/arch/arm/mach-realview/hotplug.c
@@ -0,0 +1,111 @@
+/*
+ * linux/arch/arm/mach-realview/hotplug.c
+ *
+ * Copyright (C) 2002 ARM Ltd.
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/smp.h>
+
+#include <asm/cp15.h>
+#include <asm/smp_plat.h>
+
+static inline void cpu_enter_lowpower(void)
+{
+ unsigned int v;
+
+ asm volatile(
+ " mcr p15, 0, %1, c7, c5, 0\n"
+ " mcr p15, 0, %1, c7, c10, 4\n"
+ /*
+ * Turn off coherency
+ */
+ " mrc p15, 0, %0, c1, c0, 1\n"
+ " bic %0, %0, #0x20\n"
+ " mcr p15, 0, %0, c1, c0, 1\n"
+ " mrc p15, 0, %0, c1, c0, 0\n"
+ " bic %0, %0, %2\n"
+ " mcr p15, 0, %0, c1, c0, 0\n"
+ : "=&r" (v)
+ : "r" (0), "Ir" (CR_C)
+ : "cc");
+}
+
+static inline void cpu_leave_lowpower(void)
+{
+ unsigned int v;
+
+ asm volatile( "mrc p15, 0, %0, c1, c0, 0\n"
+ " orr %0, %0, %1\n"
+ " mcr p15, 0, %0, c1, c0, 0\n"
+ " mrc p15, 0, %0, c1, c0, 1\n"
+ " orr %0, %0, #0x20\n"
+ " mcr p15, 0, %0, c1, c0, 1\n"
+ : "=&r" (v)
+ : "Ir" (CR_C)
+ : "cc");
+}
+
+static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
+{
+ /*
+ * there is no power-control hardware on this platform, so all
+ * we can do is put the core into WFI; this is safe as the calling
+ * code will have already disabled interrupts
+ */
+ for (;;) {
+ /*
+ * here's the WFI
+ */
+ asm(".word 0xe320f003\n"
+ :
+ :
+ : "memory", "cc");
+
+ if (pen_release == cpu_logical_map(cpu)) {
+ /*
+ * OK, proper wakeup, we're done
+ */
+ break;
+ }
+
+ /*
+ * Getting here, means that we have come out of WFI without
+ * having been woken up - this shouldn't happen
+ *
+ * Just note it happening - when we're woken, we can report
+ * its occurrence.
+ */
+ (*spurious)++;
+ }
+}
+
+/*
+ * platform-specific code to shutdown a CPU
+ *
+ * Called with IRQs disabled
+ */
+void realview_cpu_die(unsigned int cpu)
+{
+ int spurious = 0;
+
+ /*
+ * we're ready for shutdown now, so do it
+ */
+ cpu_enter_lowpower();
+ platform_do_lowpower(cpu, &spurious);
+
+ /*
+ * bring this CPU back into the world of cache
+ * coherency, and then restore interrupts
+ */
+ cpu_leave_lowpower();
+
+ if (spurious)
+ pr_warn("CPU%u: %u spurious wakeup calls\n", cpu, spurious);
+}
diff --git a/arch/arm/mach-realview/hotplug.h b/arch/arm/mach-realview/hotplug.h
new file mode 100644
index 0000000..eacd7a4
--- /dev/null
+++ b/arch/arm/mach-realview/hotplug.h
@@ -0,0 +1 @@
+void realview_cpu_die(unsigned int cpu);
diff --git a/arch/arm/mach-realview/platsmp-dt.c b/arch/arm/mach-realview/platsmp-dt.c
new file mode 100644
index 0000000..c242423
--- /dev/null
+++ b/arch/arm/mach-realview/platsmp-dt.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2015 Linus Walleij
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/smp.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+
+#include <asm/cacheflush.h>
+#include <asm/smp_plat.h>
+#include <asm/smp_scu.h>
+
+#include <plat/platsmp.h>
+#include "hotplug.h"
+
+#define REALVIEW_SYS_FLAGSSET_OFFSET 0x30
+
+static const struct of_device_id realview_scu_match[] = {
+ { .compatible = "arm,arm11mp-scu", },
+ { .compatible = "arm,cortex-a9-scu", },
+ { .compatible = "arm,cortex-a5-scu", },
+ { }
+};
+
+static const struct of_device_id realview_syscon_match[] = {
+ { .compatible = "arm,core-module-integrator", },
+ { .compatible = "arm,realview-eb-syscon", },
+ { .compatible = "arm,realview-pb11mp-syscon", },
+ { .compatible = "arm,realview-pbx-syscon", },
+ { },
+};
+
+static void __init realview_smp_prepare_cpus(unsigned int max_cpus)
+{
+ struct device_node *np;
+ void __iomem *scu_base;
+ struct regmap *map;
+ unsigned int ncores;
+ int i;
+
+ np = of_find_matching_node(NULL, realview_scu_match);
+ if (!np) {
+ pr_err("PLATSMP: No SCU base address\n");
+ return;
+ }
+ scu_base = of_iomap(np, 0);
+ of_node_put(np);
+ if (!scu_base) {
+ pr_err("PLATSMP: No SCU remap\n");
+ return;
+ }
+
+ scu_enable(scu_base);
+ ncores = scu_get_core_count(scu_base);
+ pr_info("SCU: %d cores detected\n", ncores);
+ for (i = 0; i < ncores; i++)
+ set_cpu_possible(i, true);
+ iounmap(scu_base);
+
+ /* The syscon contains the magic SMP start address registers */
+ np = of_find_matching_node(NULL, realview_syscon_match);
+ if (!np) {
+ pr_err("PLATSMP: No syscon match\n");
+ return;
+ }
+ map = syscon_node_to_regmap(np);
+ if (IS_ERR(map)) {
+ pr_err("PLATSMP: No syscon regmap\n");
+ return;
+ }
+ /* Put the boot address in this magic register */
+ regmap_write(map, REALVIEW_SYS_FLAGSSET_OFFSET,
+ __pa_symbol(versatile_secondary_startup));
+}
+
+static const struct smp_operations realview_dt_smp_ops __initconst = {
+ .smp_prepare_cpus = realview_smp_prepare_cpus,
+ .smp_secondary_init = versatile_secondary_init,
+ .smp_boot_secondary = versatile_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+ .cpu_die = realview_cpu_die,
+#endif
+};
+CPU_METHOD_OF_DECLARE(realview_smp, "arm,realview-smp", &realview_dt_smp_ops);
diff --git a/arch/arm/mach-realview/realview-dt.c b/arch/arm/mach-realview/realview-dt.c
new file mode 100644
index 0000000..88b6724
--- /dev/null
+++ b/arch/arm/mach-realview/realview-dt.c
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2014 Linaro Ltd.
+ *
+ * Author: Linus Walleij <linus.walleij@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/of_platform.h>
+#include <asm/mach/arch.h>
+#include <asm/hardware/cache-l2x0.h>
+
+static const char *const realview_dt_platform_compat[] __initconst = {
+ "arm,realview-eb",
+ "arm,realview-pb1176",
+ "arm,realview-pb11mp",
+ "arm,realview-pba8",
+ "arm,realview-pbx",
+ NULL,
+};
+
+DT_MACHINE_START(REALVIEW_DT, "ARM RealView Machine (Device Tree Support)")
+#ifdef CONFIG_ZONE_DMA
+ .dma_zone_size = SZ_256M,
+#endif
+ .dt_compat = realview_dt_platform_compat,
+ .l2c_aux_val = 0x0,
+ .l2c_aux_mask = ~0x0,
+MACHINE_END