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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/arm/mach-keystone
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/arm/mach-keystone')
-rw-r--r--kernel/arch/arm/mach-keystone/Kconfig16
-rw-r--r--kernel/arch/arm/mach-keystone/Makefile9
-rw-r--r--kernel/arch/arm/mach-keystone/Makefile.boot1
-rw-r--r--kernel/arch/arm/mach-keystone/keystone.c119
-rw-r--r--kernel/arch/arm/mach-keystone/keystone.h24
-rw-r--r--kernel/arch/arm/mach-keystone/memory.h24
-rw-r--r--kernel/arch/arm/mach-keystone/platsmp.c57
-rw-r--r--kernel/arch/arm/mach-keystone/pm_domain.c80
-rw-r--r--kernel/arch/arm/mach-keystone/smc.S28
9 files changed, 358 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-keystone/Kconfig b/kernel/arch/arm/mach-keystone/Kconfig
new file mode 100644
index 000000000..ea955f6db
--- /dev/null
+++ b/kernel/arch/arm/mach-keystone/Kconfig
@@ -0,0 +1,16 @@
+config ARCH_KEYSTONE
+ bool "Texas Instruments Keystone Devices"
+ depends on ARCH_MULTI_V7
+ depends on ARM_PATCH_PHYS_VIRT
+ select ARM_GIC
+ select HAVE_ARM_ARCH_TIMER
+ select CLKSRC_MMIO
+ select ARM_ERRATA_798181 if SMP
+ select COMMON_CLK_KEYSTONE
+ select ARCH_SUPPORTS_BIG_ENDIAN
+ select ZONE_DMA if ARM_LPAE
+ select MIGHT_HAVE_PCI
+ select PCI_DOMAINS if PCI
+ help
+ Support for boards based on the Texas Instruments Keystone family of
+ SoCs.
diff --git a/kernel/arch/arm/mach-keystone/Makefile b/kernel/arch/arm/mach-keystone/Makefile
new file mode 100644
index 000000000..25d92396f
--- /dev/null
+++ b/kernel/arch/arm/mach-keystone/Makefile
@@ -0,0 +1,9 @@
+obj-y := keystone.o smc.o
+
+plus_sec := $(call as-instr,.arch_extension sec,+sec)
+AFLAGS_smc.o :=-Wa,-march=armv7-a$(plus_sec)
+
+obj-$(CONFIG_SMP) += platsmp.o
+
+# PM domain driver for Keystone SOCs
+obj-$(CONFIG_ARCH_KEYSTONE) += pm_domain.o
diff --git a/kernel/arch/arm/mach-keystone/Makefile.boot b/kernel/arch/arm/mach-keystone/Makefile.boot
new file mode 100644
index 000000000..f3835c43a
--- /dev/null
+++ b/kernel/arch/arm/mach-keystone/Makefile.boot
@@ -0,0 +1 @@
+zreladdr-y := 0x80008000
diff --git a/kernel/arch/arm/mach-keystone/keystone.c b/kernel/arch/arm/mach-keystone/keystone.c
new file mode 100644
index 000000000..066208758
--- /dev/null
+++ b/kernel/arch/arm/mach-keystone/keystone.c
@@ -0,0 +1,119 @@
+/*
+ * 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 struct notifier_block platform_nb;
+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 void __init keystone_init(void)
+{
+ keystone_pm_runtime_init();
+ if (platform_nb.notifier_call)
+ bus_register_notifier(&platform_bus_type, &platform_nb);
+ of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+}
+
+static phys_addr_t keystone_virt_to_idmap(unsigned long x)
+{
+ return (phys_addr_t)(x) - CONFIG_PAGE_OFFSET + KEYSTONE_LOW_PHYS_START;
+}
+
+static void __init keystone_init_meminfo(void)
+{
+ bool lpae = IS_ENABLED(CONFIG_ARM_LPAE);
+ bool pvpatch = IS_ENABLED(CONFIG_ARM_PATCH_PHYS_VIRT);
+ phys_addr_t offset = PHYS_OFFSET - KEYSTONE_LOW_PHYS_START;
+ 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;
+
+ if (!lpae || !pvpatch) {
+ pr_crit("Enable %s%s%s to run outside 32-bit space\n",
+ !lpae ? __stringify(CONFIG_ARM_LPAE) : "",
+ (!lpae && !pvpatch) ? " and " : "",
+ !pvpatch ? __stringify(CONFIG_ARM_PATCH_PHYS_VIRT) : "");
+ }
+
+ 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);
+ }
+
+ offset += KEYSTONE_HIGH_PHYS_START;
+ __pv_phys_pfn_offset = PFN_DOWN(offset);
+ __pv_offset = (offset - PAGE_OFFSET);
+
+ /* Populate the arch idmap hook */
+ arch_virt_to_idmap = keystone_virt_to_idmap;
+ platform_nb.notifier_call = keystone_platform_notifier;
+ keystone_dma_pfn_offset = PFN_DOWN(KEYSTONE_HIGH_PHYS_START -
+ KEYSTONE_LOW_PHYS_START);
+
+ pr_info("Switching to high address space at 0x%llx\n", (u64)offset);
+}
+
+static const char *const keystone_match[] __initconst = {
+ "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,
+ .init_meminfo = keystone_init_meminfo,
+MACHINE_END
diff --git a/kernel/arch/arm/mach-keystone/keystone.h b/kernel/arch/arm/mach-keystone/keystone.h
new file mode 100644
index 000000000..cd04a1c14
--- /dev/null
+++ b/kernel/arch/arm/mach-keystone/keystone.h
@@ -0,0 +1,24 @@
+/*
+ * 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.
+ */
+
+#ifndef __KEYSTONE_H__
+#define __KEYSTONE_H__
+
+#define KEYSTONE_MON_CPU_UP_IDX 0x00
+
+#ifndef __ASSEMBLER__
+
+extern 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/kernel/arch/arm/mach-keystone/memory.h b/kernel/arch/arm/mach-keystone/memory.h
new file mode 100644
index 000000000..b854fb18e
--- /dev/null
+++ b/kernel/arch/arm/mach-keystone/memory.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2014 Texas Instruments, Inc.
+ * Santosh Shilimkar <santosh.shilimkar@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.
+ */
+#ifndef __MEMORY_H
+#define __MEMORY_H
+
+#define MAX_PHYSMEM_BITS 36
+#define SECTION_SIZE_BITS 34
+
+#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/kernel/arch/arm/mach-keystone/platsmp.c b/kernel/arch/arm/mach-keystone/platsmp.c
new file mode 100644
index 000000000..5f46a7cf9
--- /dev/null
+++ b/kernel/arch/arm/mach-keystone/platsmp.c
@@ -0,0 +1,57 @@
+/*
+ * 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.
+ *
+ * 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/init.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+
+#include <asm/smp_plat.h>
+#include <asm/prom.h>
+#include <asm/tlbflush.h>
+#include <asm/pgtable.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;
+}
+
+#ifdef CONFIG_ARM_LPAE
+static void __cpuinit keystone_smp_secondary_initmem(unsigned int cpu)
+{
+ pgd_t *pgd0 = pgd_offset_k(0);
+ cpu_set_ttbr(1, __pa(pgd0) + TTBR1_OFFSET);
+ local_flush_tlb_all();
+}
+#else
+static inline void __cpuinit keystone_smp_secondary_initmem(unsigned int cpu)
+{}
+#endif
+
+struct smp_operations keystone_smp_ops __initdata = {
+ .smp_boot_secondary = keystone_smp_boot_secondary,
+ .smp_secondary_init = keystone_smp_secondary_initmem,
+};
diff --git a/kernel/arch/arm/mach-keystone/pm_domain.c b/kernel/arch/arm/mach-keystone/pm_domain.c
new file mode 100644
index 000000000..41bebfd29
--- /dev/null
+++ b/kernel/arch/arm/mach-keystone/pm_domain.c
@@ -0,0 +1,80 @@
+/*
+ * 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>
+ *
+ * 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/init.h>
+#include <linux/pm_runtime.h>
+#include <linux/pm_clock.h>
+#include <linux/platform_device.h>
+#include <linux/clk-provider.h>
+#include <linux/of.h>
+
+#ifdef CONFIG_PM
+static int keystone_pm_runtime_suspend(struct device *dev)
+{
+ int ret;
+
+ dev_dbg(dev, "%s\n", __func__);
+
+ ret = pm_generic_runtime_suspend(dev);
+ if (ret)
+ return ret;
+
+ ret = pm_clk_suspend(dev);
+ if (ret) {
+ pm_generic_runtime_resume(dev);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int keystone_pm_runtime_resume(struct device *dev)
+{
+ dev_dbg(dev, "%s\n", __func__);
+
+ pm_clk_resume(dev);
+
+ return pm_generic_runtime_resume(dev);
+}
+#endif
+
+static struct dev_pm_domain keystone_pm_domain = {
+ .ops = {
+ SET_RUNTIME_PM_OPS(keystone_pm_runtime_suspend,
+ keystone_pm_runtime_resume, NULL)
+ USE_PLATFORM_PM_SLEEP_OPS
+ },
+};
+
+static struct pm_clk_notifier_block platform_domain_notifier = {
+ .pm_domain = &keystone_pm_domain,
+};
+
+static const struct of_device_id of_keystone_table[] = {
+ {.compatible = "ti,keystone"},
+ { /* 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/kernel/arch/arm/mach-keystone/smc.S b/kernel/arch/arm/mach-keystone/smc.S
new file mode 100644
index 000000000..d15de8179
--- /dev/null
+++ b/kernel/arch/arm/mach-keystone/smc.S
@@ -0,0 +1,28 @@
+/*
+ * Keystone Secure APIs
+ *
+ * Copyright (C) 2013 Texas Instruments, Inc.
+ * Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * 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/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
+ */
+ENTRY(keystone_cpu_smc)
+ stmfd sp!, {r4-r11, lr}
+ smc #0
+ ldmfd sp!, {r4-r11, pc}
+ENDPROC(keystone_cpu_smc)