summaryrefslogtreecommitdiffstats
path: root/kernel/arch/arm/mach-sti
diff options
context:
space:
mode:
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-sti
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-sti')
-rw-r--r--kernel/arch/arm/mach-sti/Kconfig56
-rw-r--r--kernel/arch/arm/mach-sti/Makefile2
-rw-r--r--kernel/arch/arm/mach-sti/board-dt.c34
-rw-r--r--kernel/arch/arm/mach-sti/headsmp.S42
-rw-r--r--kernel/arch/arm/mach-sti/platsmp.c116
-rw-r--r--kernel/arch/arm/mach-sti/smp.h17
6 files changed, 267 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-sti/Kconfig b/kernel/arch/arm/mach-sti/Kconfig
new file mode 100644
index 000000000..3b1ac463a
--- /dev/null
+++ b/kernel/arch/arm/mach-sti/Kconfig
@@ -0,0 +1,56 @@
+menuconfig ARCH_STI
+ bool "STMicroelectronics Consumer Electronics SOCs" if ARCH_MULTI_V7
+ select ARM_GIC
+ select ARM_GLOBAL_TIMER
+ select PINCTRL
+ select PINCTRL_ST
+ select MFD_SYSCON
+ select ARCH_HAS_RESET_CONTROLLER
+ select HAVE_ARM_SCU if SMP
+ select ARCH_REQUIRE_GPIOLIB
+ select ARM_ERRATA_754322
+ select ARM_ERRATA_764369 if SMP
+ select ARM_ERRATA_775420
+ select PL310_ERRATA_753970 if CACHE_L2X0
+ select PL310_ERRATA_769419 if CACHE_L2X0
+ select RESET_CONTROLLER
+ help
+ Include support for STiH41x SOCs like STiH415/416 using the device tree
+ for discovery
+ More information at Documentation/arm/STiH41x and
+ at Documentation/devicetree
+
+
+if ARCH_STI
+
+config SOC_STIH415
+ bool "STiH415 STMicroelectronics Consumer Electronics family"
+ default y
+ select STIH415_RESET
+ help
+ This enables support for STMicroelectronics Digital Consumer
+ Electronics family StiH415 parts, primarily targeted at set-top-box
+ and other digital audio/video applications using Flattned Device
+ Trees.
+
+config SOC_STIH416
+ bool "STiH416 STMicroelectronics Consumer Electronics family"
+ default y
+ select STIH416_RESET
+ help
+ This enables support for STMicroelectronics Digital Consumer
+ Electronics family StiH416 parts, primarily targeted at set-top-box
+ and other digital audio/video applications using Flattened Device
+ Trees.
+
+config SOC_STIH407
+ bool "STiH407 STMicroelectronics Consumer Electronics family"
+ default y
+ select STIH407_RESET
+ help
+ This enables support for STMicroelectronics Digital Consumer
+ Electronics family StiH407 parts, targetted at set-top-box
+ and other digital audio/video applications using Flattened Device
+ Trees.
+
+endif
diff --git a/kernel/arch/arm/mach-sti/Makefile b/kernel/arch/arm/mach-sti/Makefile
new file mode 100644
index 000000000..acb330916
--- /dev/null
+++ b/kernel/arch/arm/mach-sti/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_SMP) += platsmp.o headsmp.o
+obj-$(CONFIG_ARCH_STI) += board-dt.o
diff --git a/kernel/arch/arm/mach-sti/board-dt.c b/kernel/arch/arm/mach-sti/board-dt.c
new file mode 100644
index 000000000..b373acade
--- /dev/null
+++ b/kernel/arch/arm/mach-sti/board-dt.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * Author(s): Srinivas Kandagatla <srinivas.kandagatla@st.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/irq.h>
+#include <linux/of_platform.h>
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/mach/arch.h>
+
+#include "smp.h"
+
+static const char *stih41x_dt_match[] __initdata = {
+ "st,stih415",
+ "st,stih416",
+ "st,stih407",
+ "st,stih410",
+ "st,stih418",
+ NULL
+};
+
+DT_MACHINE_START(STM, "STiH415/416 SoC with Flattened Device Tree")
+ .dt_compat = stih41x_dt_match,
+ .l2c_aux_val = L2C_AUX_CTRL_SHARED_OVERRIDE |
+ L310_AUX_CTRL_DATA_PREFETCH |
+ L310_AUX_CTRL_INSTR_PREFETCH |
+ L2C_AUX_CTRL_WAY_SIZE(4),
+ .l2c_aux_mask = 0xc0000fff,
+ .smp = smp_ops(sti_smp_ops),
+MACHINE_END
diff --git a/kernel/arch/arm/mach-sti/headsmp.S b/kernel/arch/arm/mach-sti/headsmp.S
new file mode 100644
index 000000000..4c09bae86
--- /dev/null
+++ b/kernel/arch/arm/mach-sti/headsmp.S
@@ -0,0 +1,42 @@
+/*
+ * arch/arm/mach-sti/headsmp.S
+ *
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * http://www.st.com
+ *
+ * Cloned from linux/arch/arm/mach-vexpress/headsmp.S
+ *
+ * Copyright (c) 2003 ARM Limited
+ * 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/linkage.h>
+#include <linux/init.h>
+
+/*
+ * ST specific entry point for secondary CPUs. This provides
+ * a "holding pen" into which all secondary cores are held until we're
+ * ready for them to initialise.
+ */
+ENTRY(sti_secondary_startup)
+ mrc p15, 0, r0, c0, c0, 5
+ and r0, r0, #15
+ adr r4, 1f
+ ldmia r4, {r5, r6}
+ sub r4, r4, r5
+ add r6, r6, r4
+pen: ldr r7, [r6]
+ cmp r7, r0
+ bne pen
+
+ /*
+ * we've been released from the holding pen: secondary_stack
+ * should now contain the SVC stack for this core
+ */
+ b secondary_startup
+
+1: .long .
+ .long pen_release
diff --git a/kernel/arch/arm/mach-sti/platsmp.c b/kernel/arch/arm/mach-sti/platsmp.c
new file mode 100644
index 000000000..56d402812
--- /dev/null
+++ b/kernel/arch/arm/mach-sti/platsmp.c
@@ -0,0 +1,116 @@
+/*
+ * arch/arm/mach-sti/platsmp.c
+ *
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * http://www.st.com
+ *
+ * Cloned from linux/arch/arm/mach-vexpress/platsmp.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/init.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#include <asm/cacheflush.h>
+#include <asm/smp_plat.h>
+#include <asm/smp_scu.h>
+
+#include "smp.h"
+
+static void write_pen_release(int val)
+{
+ pen_release = val;
+ smp_wmb();
+ sync_cache_w(&pen_release);
+}
+
+static DEFINE_RAW_SPINLOCK(boot_lock);
+
+static void sti_secondary_init(unsigned int cpu)
+{
+ trace_hardirqs_off();
+
+ /*
+ * let the primary processor know we're out of the
+ * pen, then head off into the C entry point
+ */
+ write_pen_release(-1);
+
+ /*
+ * Synchronise with the boot thread.
+ */
+ raw_spin_lock(&boot_lock);
+ raw_spin_unlock(&boot_lock);
+}
+
+static int sti_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+ unsigned long timeout;
+
+ /*
+ * set synchronisation state between this boot processor
+ * and the secondary one
+ */
+ raw_spin_lock(&boot_lock);
+
+ /*
+ * The secondary processor is waiting to be released from
+ * the holding pen - release it, then wait for it to flag
+ * that it has been released by resetting pen_release.
+ *
+ * Note that "pen_release" is the hardware CPU ID, whereas
+ * "cpu" is Linux's internal ID.
+ */
+ write_pen_release(cpu_logical_map(cpu));
+
+ /*
+ * Send the secondary CPU a soft interrupt, thereby causing
+ * it to jump to the secondary entrypoint.
+ */
+ arch_send_wakeup_ipi_mask(cpumask_of(cpu));
+
+ timeout = jiffies + (1 * HZ);
+ while (time_before(jiffies, timeout)) {
+ smp_rmb();
+ if (pen_release == -1)
+ break;
+
+ udelay(10);
+ }
+
+ /*
+ * now the secondary core is starting up let it run its
+ * calibrations, then wait for it to finish
+ */
+ raw_spin_unlock(&boot_lock);
+
+ return pen_release != -1 ? -ENOSYS : 0;
+}
+
+static void __init sti_smp_prepare_cpus(unsigned int max_cpus)
+{
+ void __iomem *scu_base = NULL;
+ struct device_node *np = of_find_compatible_node(
+ NULL, NULL, "arm,cortex-a9-scu");
+ if (np) {
+ scu_base = of_iomap(np, 0);
+ scu_enable(scu_base);
+ of_node_put(np);
+ }
+}
+
+struct smp_operations __initdata sti_smp_ops = {
+ .smp_prepare_cpus = sti_smp_prepare_cpus,
+ .smp_secondary_init = sti_secondary_init,
+ .smp_boot_secondary = sti_boot_secondary,
+};
diff --git a/kernel/arch/arm/mach-sti/smp.h b/kernel/arch/arm/mach-sti/smp.h
new file mode 100644
index 000000000..1871b72b1
--- /dev/null
+++ b/kernel/arch/arm/mach-sti/smp.h
@@ -0,0 +1,17 @@
+/*
+ * arch/arm/mach-sti/smp.h
+ *
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * http://www.st.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.
+ */
+
+#ifndef __MACH_STI_SMP_H
+#define __MACH_STI_SMP_H
+
+extern struct smp_operations sti_smp_ops;
+
+#endif