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-rw-r--r--arch/arm/mach-keystone/Kconfig17
-rw-r--r--arch/arm/mach-keystone/Makefile7
-rw-r--r--arch/arm/mach-keystone/keystone.c110
-rw-r--r--arch/arm/mach-keystone/keystone.h21
-rw-r--r--arch/arm/mach-keystone/memory.h18
-rw-r--r--arch/arm/mach-keystone/platsmp.c41
-rw-r--r--arch/arm/mach-keystone/pm_domain.c50
-rw-r--r--arch/arm/mach-keystone/smc.S26
8 files changed, 290 insertions, 0 deletions
diff --git a/arch/arm/mach-keystone/Kconfig b/arch/arm/mach-keystone/Kconfig
new file mode 100644
index 000000000..cfd39f729
--- /dev/null
+++ b/arch/arm/mach-keystone/Kconfig
@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config ARCH_KEYSTONE
+ bool "Texas Instruments Keystone Devices"
+ depends on ARCH_MULTI_V7
+ select ARM_GIC
+ select HAVE_ARM_ARCH_TIMER
+ select KEYSTONE_TIMER
+ select ARCH_HAS_RESET_CONTROLLER
+ select ARM_ERRATA_798181 if SMP
+ select COMMON_CLK_KEYSTONE
+ select ARCH_SUPPORTS_BIG_ENDIAN
+ select ZONE_DMA if ARM_LPAE
+ select PINCTRL
+ select PM_GENERIC_DOMAINS if PM
+ help
+ Support for boards based on the Texas Instruments Keystone family of
+ SoCs.
diff --git a/arch/arm/mach-keystone/Makefile b/arch/arm/mach-keystone/Makefile
new file mode 100644
index 000000000..739b38be5
--- /dev/null
+++ b/arch/arm/mach-keystone/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-y := keystone.o smc.o
+
+obj-$(CONFIG_SMP) += platsmp.o
+
+# PM domain driver for Keystone SOCs
+obj-$(CONFIG_ARCH_KEYSTONE) += pm_domain.o
diff --git a/arch/arm/mach-keystone/keystone.c b/arch/arm/mach-keystone/keystone.c
new file mode 100644
index 000000000..b8fa01f95
--- /dev/null
+++ b/arch/arm/mach-keystone/keystone.c
@@ -0,0 +1,110 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Keystone2 based boards and SOC related code.
+ *
+ * Copyright 2013 Texas Instruments, Inc.
+ * Cyril Chemparathy <cyril@ti.com>
+ * Santosh Shilimkar <santosh.shillimkar@ti.com>
+ */
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/dma-mapping.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"
+
+#ifdef CONFIG_ARM_LPAE
+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) {
+ int ret = dma_direct_set_offset(dev, KEYSTONE_HIGH_PHYS_START,
+ KEYSTONE_LOW_PHYS_START,
+ KEYSTONE_HIGH_PHYS_SIZE);
+ dev_err(dev, "set dma_offset%08llx%s\n",
+ KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START,
+ ret ? " failed" : "");
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block platform_nb = {
+ .notifier_call = keystone_platform_notifier,
+};
+#endif /* CONFIG_ARM_LPAE */
+
+static void __init keystone_init(void)
+{
+#ifdef CONFIG_ARM_LPAE
+ if (PHYS_OFFSET >= KEYSTONE_HIGH_PHYS_START)
+ bus_register_notifier(&platform_bus_type, &platform_nb);
+#endif
+ keystone_pm_runtime_init();
+}
+
+static long long __init keystone_pv_fixup(void)
+{
+ long long offset;
+ u64 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",
+ mem_start, 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
diff --git a/arch/arm/mach-keystone/keystone.h b/arch/arm/mach-keystone/keystone.h
new file mode 100644
index 000000000..438e531cc
--- /dev/null
+++ b/arch/arm/mach-keystone/keystone.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright 2013 Texas Instruments, Inc.
+ * Cyril Chemparathy <cyril@ti.com>
+ * Santosh Shilimkar <santosh.shillimkar@ti.com>
+ */
+
+#ifndef __KEYSTONE_H__
+#define __KEYSTONE_H__
+
+#define KEYSTONE_MON_CPU_UP_IDX 0x00
+
+#ifndef __ASSEMBLER__
+
+extern const struct smp_operations keystone_smp_ops;
+extern void secondary_startup(void);
+extern u32 keystone_cpu_smc(u32 command, u32 cpu, u32 addr);
+extern int keystone_pm_runtime_init(void);
+
+#endif /* __ASSEMBLER__ */
+#endif /* __KEYSTONE_H__ */
diff --git a/arch/arm/mach-keystone/memory.h b/arch/arm/mach-keystone/memory.h
new file mode 100644
index 000000000..1b9ed1271
--- /dev/null
+++ b/arch/arm/mach-keystone/memory.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright 2014 Texas Instruments, Inc.
+ * Santosh Shilimkar <santosh.shilimkar@ti.com>
+ */
+#ifndef __MEMORY_H
+#define __MEMORY_H
+
+#define KEYSTONE_LOW_PHYS_START 0x80000000ULL
+#define KEYSTONE_LOW_PHYS_SIZE 0x80000000ULL /* 2G */
+#define KEYSTONE_LOW_PHYS_END (KEYSTONE_LOW_PHYS_START + \
+ KEYSTONE_LOW_PHYS_SIZE - 1)
+
+#define KEYSTONE_HIGH_PHYS_START 0x800000000ULL
+#define KEYSTONE_HIGH_PHYS_SIZE 0x400000000ULL /* 16G */
+#define KEYSTONE_HIGH_PHYS_END (KEYSTONE_HIGH_PHYS_START + \
+ KEYSTONE_HIGH_PHYS_SIZE - 1)
+#endif /* __MEMORY_H */
diff --git a/arch/arm/mach-keystone/platsmp.c b/arch/arm/mach-keystone/platsmp.c
new file mode 100644
index 000000000..673fcf3b3
--- /dev/null
+++ b/arch/arm/mach-keystone/platsmp.c
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Keystone SOC SMP platform code
+ *
+ * Copyright 2013 Texas Instruments, Inc.
+ * Cyril Chemparathy <cyril@ti.com>
+ * Santosh Shilimkar <santosh.shillimkar@ti.com>
+ *
+ * Based on platsmp.c, Copyright (C) 2002 ARM Ltd.
+ */
+
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+#include <linux/pgtable.h>
+
+#include <asm/smp_plat.h>
+#include <asm/prom.h>
+#include <asm/tlbflush.h>
+
+#include "keystone.h"
+
+static int keystone_smp_boot_secondary(unsigned int cpu,
+ struct task_struct *idle)
+{
+ unsigned long start = virt_to_idmap(&secondary_startup);
+ int error;
+
+ pr_debug("keystone-smp: booting cpu %d, vector %08lx\n",
+ cpu, start);
+
+ error = keystone_cpu_smc(KEYSTONE_MON_CPU_UP_IDX, cpu, start);
+ if (error)
+ pr_err("CPU %d bringup failed with %d\n", cpu, error);
+
+ return error;
+}
+
+const struct smp_operations keystone_smp_ops __initconst = {
+ .smp_boot_secondary = keystone_smp_boot_secondary,
+};
diff --git a/arch/arm/mach-keystone/pm_domain.c b/arch/arm/mach-keystone/pm_domain.c
new file mode 100644
index 000000000..5eea01cbe
--- /dev/null
+++ b/arch/arm/mach-keystone/pm_domain.c
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * PM domain driver for Keystone2 devices
+ *
+ * Copyright 2013 Texas Instruments, Inc.
+ * Santosh Shilimkar <santosh.shillimkar@ti.com>
+ *
+ * Based on Kevins work on DAVINCI SOCs
+ * Kevin Hilman <khilman@linaro.org>
+ */
+
+#include <linux/init.h>
+#include <linux/pm_runtime.h>
+#include <linux/pm_clock.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+
+#include "keystone.h"
+
+static struct dev_pm_domain keystone_pm_domain = {
+ .ops = {
+ USE_PM_CLK_RUNTIME_OPS
+ USE_PLATFORM_PM_SLEEP_OPS
+ },
+};
+
+static struct pm_clk_notifier_block platform_domain_notifier = {
+ .pm_domain = &keystone_pm_domain,
+ .con_ids = { NULL },
+};
+
+static const struct of_device_id of_keystone_table[] = {
+ {.compatible = "ti,k2hk"},
+ {.compatible = "ti,k2e"},
+ {.compatible = "ti,k2l"},
+ { /* end of list */ },
+};
+
+int __init keystone_pm_runtime_init(void)
+{
+ struct device_node *np;
+
+ np = of_find_matching_node(NULL, of_keystone_table);
+ if (!np)
+ return 0;
+
+ pm_clk_add_notifier(&platform_bus_type, &platform_domain_notifier);
+
+ return 0;
+}
diff --git a/arch/arm/mach-keystone/smc.S b/arch/arm/mach-keystone/smc.S
new file mode 100644
index 000000000..21ef75cf5
--- /dev/null
+++ b/arch/arm/mach-keystone/smc.S
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Keystone Secure APIs
+ *
+ * Copyright (C) 2013 Texas Instruments, Inc.
+ * Santosh Shilimkar <santosh.shilimkar@ti.com>
+ */
+
+#include <linux/linkage.h>
+
+/**
+ * u32 keystone_cpu_smc(u32 command, u32 cpu, u32 addr)
+ *
+ * Low level CPU monitor API
+ * @command: Monitor command.
+ * @cpu: CPU Number
+ * @addr: Kernel jump address for boot CPU
+ *
+ * Return: Non zero value on failure
+ */
+ .arch_extension sec
+ENTRY(keystone_cpu_smc)
+ stmfd sp!, {r4-r11, lr}
+ smc #0
+ ldmfd sp!, {r4-r11, pc}
+ENDPROC(keystone_cpu_smc)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 21:58:12 +0000