[PATCH v11 5/6] ARM: hi3xxx: add smp support
Haojian Zhuang
haojian.zhuang at linaro.org
Thu Nov 7 03:41:30 EST 2013
From: Zhangfei Gao <zhangfei.gao at linaro.org>
Enable SMP support on hi3xxx platform
Signed-off-by: Zhangfei Gao <zhangfei.gao at linaro.org>
Tested-by: Zhang Mingjun <zhang.mingjun at linaro.org>
Tested-by: Li Xin <li.xin at linaro.org>
Signed-off-by: Haojian Zhuang <haojian.zhuang at linaro.org>
---
.../bindings/arm/hisilicon/hisilicon.txt | 30 ++++++--
arch/arm/boot/dts/hi3620.dtsi | 38 ++++++++++
arch/arm/mach-hi3xxx/Kconfig | 3 +
arch/arm/mach-hi3xxx/Makefile | 1 +
arch/arm/mach-hi3xxx/core.h | 11 +++
arch/arm/mach-hi3xxx/hi3xxx.c | 34 +++++++++
arch/arm/mach-hi3xxx/platsmp.c | 84 ++++++++++++++++++++++
7 files changed, 197 insertions(+), 4 deletions(-)
create mode 100644 arch/arm/mach-hi3xxx/core.h
create mode 100644 arch/arm/mach-hi3xxx/platsmp.c
diff --git a/Documentation/devicetree/bindings/arm/hisilicon/hisilicon.txt b/Documentation/devicetree/bindings/arm/hisilicon/hisilicon.txt
index 3be60c8..8c7a465 100644
--- a/Documentation/devicetree/bindings/arm/hisilicon/hisilicon.txt
+++ b/Documentation/devicetree/bindings/arm/hisilicon/hisilicon.txt
@@ -1,10 +1,32 @@
Hisilicon Platforms Device Tree Bindings
----------------------------------------------------
-Hi3716 Development Board
-Required root node properties:
- - compatible = "hisilicon,hi3716-dkb";
-
Hi4511 Board
Required root node properties:
- compatible = "hisilicon,hi3620-hi4511";
+
+Hisilicon system controller
+
+Required properties:
+- compatible : "hisilicon,sysctrl"
+- reg : Register address and size
+
+Optional properties:
+- smp-offset : offset in sysctrl for notifying slave cpu booting
+ cpu 1, reg;
+ cpu 2, reg + 0x4;
+ cpu 3, reg + 0x8;
+ If reg value is not zero, cpun exit wfi and go
+- resume-offset : offset in sysctrl for notifying cpu0 when resume
+- reboot-offset : offset in sysctrl for system reboot
+
+Example:
+
+ /* for Hi3620 */
+ sysctrl: system-controller at fc802000 {
+ compatible = "hisilicon,sysctrl";
+ reg = <0xfc802000 0x1000>;
+ smp-offset = <0x31c>;
+ resume-offset = <0x308>;
+ reboot-offset = <0x4>;
+ };
diff --git a/arch/arm/boot/dts/hi3620.dtsi b/arch/arm/boot/dts/hi3620.dtsi
index b9d8679..e311937 100644
--- a/arch/arm/boot/dts/hi3620.dtsi
+++ b/arch/arm/boot/dts/hi3620.dtsi
@@ -39,6 +39,27 @@
reg = <0x0>;
next-level-cache = <&L2>;
};
+
+ cpu at 1 {
+ compatible = "arm,cortex-a9";
+ device_type = "cpu";
+ reg = <1>;
+ next-level-cache = <&L2>;
+ };
+
+ cpu at 2 {
+ compatible = "arm,cortex-a9";
+ device_type = "cpu";
+ reg = <2>;
+ next-level-cache = <&L2>;
+ };
+
+ cpu at 3 {
+ compatible = "arm,cortex-a9";
+ device_type = "cpu";
+ reg = <3>;
+ next-level-cache = <&L2>;
+ };
};
amba {
@@ -65,6 +86,17 @@
reg = <0x1000 0x1000>, <0x100 0x100>;
};
+ sysctrl: system-controller at 802000 {
+ compatible = "hisilicon,sysctrl";
+ reg = <0x802000 0x1000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ smp-offset = <0x31c>;
+ resume-offset = <0x308>;
+ reboot-offset = <0x4>;
+ };
+
dual_timer0: dual_timer at 800000 {
compatible = "arm,sp804", "arm,primecell";
reg = <0x800000 0x1000>;
@@ -115,6 +147,12 @@
status = "disabled";
};
+ timer5: timer at 600 {
+ compatible = "arm,cortex-a9-twd-timer";
+ reg = <0x600 0x20>;
+ interrupts = <1 13 0xf01>;
+ };
+
uart0: uart at b00000 {
compatible = "arm,pl011", "arm,primecell";
reg = <0xb00000 0x1000>;
diff --git a/arch/arm/mach-hi3xxx/Kconfig b/arch/arm/mach-hi3xxx/Kconfig
index 68bd26c..d0f298a 100644
--- a/arch/arm/mach-hi3xxx/Kconfig
+++ b/arch/arm/mach-hi3xxx/Kconfig
@@ -6,6 +6,9 @@ config ARCH_HI3xxx
select CACHE_L2X0
select CLKSRC_OF
select GENERIC_CLOCKEVENTS
+ select HAVE_ARM_SCU
+ select HAVE_ARM_TWD
+ select HAVE_SMP
select PINCTRL
select PINCTRL_SINGLE
help
diff --git a/arch/arm/mach-hi3xxx/Makefile b/arch/arm/mach-hi3xxx/Makefile
index d68ebb3..7a869a7 100644
--- a/arch/arm/mach-hi3xxx/Makefile
+++ b/arch/arm/mach-hi3xxx/Makefile
@@ -3,3 +3,4 @@
#
obj-y += hi3xxx.o
+obj-$(CONFIG_SMP) += platsmp.o
diff --git a/arch/arm/mach-hi3xxx/core.h b/arch/arm/mach-hi3xxx/core.h
new file mode 100644
index 0000000..226f020
--- /dev/null
+++ b/arch/arm/mach-hi3xxx/core.h
@@ -0,0 +1,11 @@
+#ifndef __HISILICON_CORE_H
+#define __HISILICON_CORE_H
+
+#include <linux/reboot.h>
+
+extern void hi3xxx_set_cpu_jump(int cpu, void *jump_addr);
+extern int hi3xxx_get_cpu_jump(int cpu);
+extern void secondary_startup(void);
+extern struct smp_operations hi3xxx_smp_ops;
+
+#endif
diff --git a/arch/arm/mach-hi3xxx/hi3xxx.c b/arch/arm/mach-hi3xxx/hi3xxx.c
index 925af13..80990b3 100644
--- a/arch/arm/mach-hi3xxx/hi3xxx.c
+++ b/arch/arm/mach-hi3xxx/hi3xxx.c
@@ -14,11 +14,16 @@
#include <linux/clk-provider.h>
#include <linux/clocksource.h>
#include <linux/irqchip.h>
+#include <linux/of_address.h>
#include <linux/of_platform.h>
+#include <asm/proc-fns.h>
+
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
+#include "core.h"
+
/*
* This table is only for optimization. Since ioremap() could always share
* the same mapping if it's defined as static IO mapping.
@@ -29,6 +34,7 @@
*/
static struct map_desc hi3620_io_desc[] __initdata = {
{
+ /* sysctrl */
.pfn = __phys_to_pfn(0xfc802000),
.virtual = 0xfe802000,
.length = 0x1000,
@@ -48,6 +54,32 @@ static void __init hi3xxx_timer_init(void)
clocksource_of_init();
}
+static void hi3xxx_restart(enum reboot_mode mode, const char *cmd)
+{
+ struct device_node *np;
+ void __iomem *base;
+ int offset;
+
+ np = of_find_compatible_node(NULL, NULL, "hisilicon,sysctrl");
+ if (!np) {
+ pr_err("failed to find hisilicon,sysctrl node\n");
+ return;
+ }
+ base = of_iomap(np, 0);
+ if (!base) {
+ pr_err("failed to map address in hisilicon,sysctrl node\n");
+ return;
+ }
+ if (of_property_read_u32(np, "reboot-offset", &offset) < 0) {
+ pr_err("failed to find reboot-offset property\n");
+ return;
+ }
+ writel_relaxed(0xdeadbeef, base + offset);
+
+ while (1)
+ cpu_do_idle();
+}
+
static const char *hi3xxx_compat[] __initdata = {
"hisilicon,hi3620-hi4511",
NULL,
@@ -57,4 +89,6 @@ DT_MACHINE_START(HI3620, "Hisilicon Hi3620 (Flattened Device Tree)")
.map_io = hi3620_map_io,
.init_time = hi3xxx_timer_init,
.dt_compat = hi3xxx_compat,
+ .smp = smp_ops(hi3xxx_smp_ops),
+ .restart = hi3xxx_restart,
MACHINE_END
diff --git a/arch/arm/mach-hi3xxx/platsmp.c b/arch/arm/mach-hi3xxx/platsmp.c
new file mode 100644
index 0000000..a4d04c0
--- /dev/null
+++ b/arch/arm/mach-hi3xxx/platsmp.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2013 Linaro Ltd.
+ * Copyright (c) 2013 Hisilicon Limited.
+ * 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/smp.h>
+#include <linux/io.h>
+#include <linux/of_address.h>
+
+#include <asm/cacheflush.h>
+#include <asm/smp_plat.h>
+#include <asm/smp_scu.h>
+
+#include "core.h"
+
+static void __iomem *ctrl_base = NULL;
+
+void hi3xxx_set_cpu_jump(int cpu, void *jump_addr)
+{
+ cpu = cpu_logical_map(cpu);
+ if (!cpu || !ctrl_base)
+ return;
+ writel_relaxed(virt_to_phys(jump_addr), ctrl_base + ((cpu - 1) << 2));
+}
+
+int hi3xxx_get_cpu_jump(int cpu)
+{
+ cpu = cpu_logical_map(cpu);
+ if (!cpu || !ctrl_base)
+ return 0;
+ return readl_relaxed(ctrl_base + ((cpu - 1 ) << 2));
+}
+
+static void __init hi3xxx_smp_prepare_cpus(unsigned int max_cpus)
+{
+ struct device_node *np = NULL;
+ unsigned long base = 0;
+ u32 offset = 0;
+ void __iomem *scu_base = NULL;
+
+ if (scu_a9_has_base()) {
+ base = scu_a9_get_base();
+ scu_base = ioremap(base, SZ_4K);
+ if (!scu_base) {
+ pr_err("ioremap(scu_base) failed\n");
+ return;
+ }
+ scu_enable(scu_base);
+ iounmap(scu_base);
+ }
+ if (!ctrl_base) {
+ np = of_find_compatible_node(NULL, NULL, "hisilicon,sysctrl");
+ if (!np) {
+ pr_err("failed to find hisilicon,sysctrl node\n");
+ return;
+ }
+ ctrl_base = of_iomap(np, 0);
+ if (!ctrl_base) {
+ pr_err("failed to map address\n");
+ return;
+ }
+ if (of_property_read_u32(np, "smp-offset", &offset) < 0) {
+ pr_err("failed to find smp-offset property\n");
+ return;
+ }
+ ctrl_base += offset;
+ }
+}
+
+static int hi3xxx_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+ hi3xxx_set_cpu_jump(cpu, secondary_startup);
+ arch_send_wakeup_ipi_mask(cpumask_of(cpu));
+ return 0;
+}
+
+struct smp_operations hi3xxx_smp_ops __initdata = {
+ .smp_prepare_cpus = hi3xxx_smp_prepare_cpus,
+ .smp_boot_secondary = hi3xxx_boot_secondary,
+};
--
1.8.3.2
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