v4.19.13 snapshot.
diff --git a/arch/arm/mach-keystone/keystone.c b/arch/arm/mach-keystone/keystone.c
new file mode 100644
index 0000000..84613ab
--- /dev/null
+++ b/arch/arm/mach-keystone/keystone.c
@@ -0,0 +1,110 @@
+/*
+ * Keystone2 based boards and SOC related code.
+ *
+ * Copyright 2013 Texas Instruments, Inc.
+ * Cyril Chemparathy <cyril@ti.com>
+ * Santosh Shilimkar <santosh.shillimkar@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/init.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+#include <linux/memblock.h>
+
+#include <asm/setup.h>
+#include <asm/mach/map.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+#include <asm/smp_plat.h>
+#include <asm/memory.h>
+
+#include "memory.h"
+
+#include "keystone.h"
+
+static unsigned long keystone_dma_pfn_offset __read_mostly;
+
+static int keystone_platform_notifier(struct notifier_block *nb,
+ unsigned long event, void *data)
+{
+ struct device *dev = data;
+
+ if (event != BUS_NOTIFY_ADD_DEVICE)
+ return NOTIFY_DONE;
+
+ if (!dev)
+ return NOTIFY_BAD;
+
+ if (!dev->of_node) {
+ dev->dma_pfn_offset = keystone_dma_pfn_offset;
+ dev_err(dev, "set dma_pfn_offset%08lx\n",
+ dev->dma_pfn_offset);
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block platform_nb = {
+ .notifier_call = keystone_platform_notifier,
+};
+
+static void __init keystone_init(void)
+{
+ if (PHYS_OFFSET >= KEYSTONE_HIGH_PHYS_START) {
+ keystone_dma_pfn_offset = PFN_DOWN(KEYSTONE_HIGH_PHYS_START -
+ KEYSTONE_LOW_PHYS_START);
+ bus_register_notifier(&platform_bus_type, &platform_nb);
+ }
+ keystone_pm_runtime_init();
+}
+
+static long long __init keystone_pv_fixup(void)
+{
+ long long offset;
+ phys_addr_t mem_start, mem_end;
+
+ mem_start = memblock_start_of_DRAM();
+ mem_end = memblock_end_of_DRAM();
+
+ /* nothing to do if we are running out of the <32-bit space */
+ if (mem_start >= KEYSTONE_LOW_PHYS_START &&
+ mem_end <= KEYSTONE_LOW_PHYS_END)
+ return 0;
+
+ if (mem_start < KEYSTONE_HIGH_PHYS_START ||
+ mem_end > KEYSTONE_HIGH_PHYS_END) {
+ pr_crit("Invalid address space for memory (%08llx-%08llx)\n",
+ (u64)mem_start, (u64)mem_end);
+ return 0;
+ }
+
+ offset = KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START;
+
+ /* Populate the arch idmap hook */
+ arch_phys_to_idmap_offset = -offset;
+
+ return offset;
+}
+
+static const char *const keystone_match[] __initconst = {
+ "ti,k2hk",
+ "ti,k2e",
+ "ti,k2l",
+ "ti,k2g",
+ "ti,keystone",
+ NULL,
+};
+
+DT_MACHINE_START(KEYSTONE, "Keystone")
+#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
+ .dma_zone_size = SZ_2G,
+#endif
+ .smp = smp_ops(keystone_smp_ops),
+ .init_machine = keystone_init,
+ .dt_compat = keystone_match,
+ .pv_fixup = keystone_pv_fixup,
+MACHINE_END