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Subject[RFC 20/22] ARM: keystone: introducing TI Keystone platform
Date
Texas Instruments Keystone family of multicore devices now includes an
upcoming slew of Cortex A15 based devices. This patch adds basic definitions
for a new Keystone sub-architecture in ARM.

Subsequent patches in this series will extend support to include SMP and take
advantage of the large physical memory addressing capabilities via LPAE.

Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Cyril Chemparathy <cyril@ti.com>
---
arch/arm/Kconfig | 18 +++++
arch/arm/Makefile | 1 +
arch/arm/boot/dts/keystone-sim.dts | 77 +++++++++++++++++++
arch/arm/configs/keystone_defconfig | 20 +++++
arch/arm/mach-keystone/Makefile | 1 +
arch/arm/mach-keystone/Makefile.boot | 1 +
arch/arm/mach-keystone/include/mach/debug-macro.S | 44 +++++++++++
arch/arm/mach-keystone/include/mach/memory.h | 22 ++++++
arch/arm/mach-keystone/include/mach/timex.h | 21 ++++++
arch/arm/mach-keystone/include/mach/uncompress.h | 24 ++++++
arch/arm/mach-keystone/keystone.c | 82 +++++++++++++++++++++
11 files changed, 311 insertions(+)
create mode 100644 arch/arm/boot/dts/keystone-sim.dts
create mode 100644 arch/arm/configs/keystone_defconfig
create mode 100644 arch/arm/mach-keystone/Makefile
create mode 100644 arch/arm/mach-keystone/Makefile.boot
create mode 100644 arch/arm/mach-keystone/include/mach/debug-macro.S
create mode 100644 arch/arm/mach-keystone/include/mach/memory.h
create mode 100644 arch/arm/mach-keystone/include/mach/timex.h
create mode 100644 arch/arm/mach-keystone/include/mach/uncompress.h
create mode 100644 arch/arm/mach-keystone/keystone.c

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a91009c..e0588e3 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -358,6 +358,24 @@ config ARCH_HIGHBANK
help
Support for the Calxeda Highbank SoC based boards.

+config ARCH_KEYSTONE
+ bool "Texas Instruments Keystone Devices"
+ select ARCH_WANT_OPTIONAL_GPIOLIB
+ select ARM_GIC
+ select MULTI_IRQ_HANDLER
+ select CLKDEV_LOOKUP
+ select COMMON_CLK
+ select CLKSRC_MMIO
+ select CPU_V7
+ select GENERIC_CLOCKEVENTS
+ select USE_OF
+ select SPARSE_IRQ
+ select NEED_MACH_MEMORY_H
+ select HAVE_SCHED_CLOCK
+ help
+ Support for boards based on the Texas Instruments Keystone family of
+ SoCs.
+
config ARCH_CLPS711X
bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
select CPU_ARM720T
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 0298b00..13d6ef5 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -143,6 +143,7 @@ machine-$(CONFIG_ARCH_EP93XX) := ep93xx
machine-$(CONFIG_ARCH_GEMINI) := gemini
machine-$(CONFIG_ARCH_H720X) := h720x
machine-$(CONFIG_ARCH_HIGHBANK) := highbank
+machine-$(CONFIG_ARCH_KEYSTONE) := keystone
machine-$(CONFIG_ARCH_INTEGRATOR) := integrator
machine-$(CONFIG_ARCH_IOP13XX) := iop13xx
machine-$(CONFIG_ARCH_IOP32X) := iop32x
diff --git a/arch/arm/boot/dts/keystone-sim.dts b/arch/arm/boot/dts/keystone-sim.dts
new file mode 100644
index 0000000..118d631
--- /dev/null
+++ b/arch/arm/boot/dts/keystone-sim.dts
@@ -0,0 +1,77 @@
+/dts-v1/;
+/include/ "skeleton.dtsi"
+
+/ {
+ model = "Texas Instruments Keystone 2 SoC";
+ compatible = "ti,keystone-evm";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ interrupt-parent = <&gic>;
+
+ aliases {
+ serial0 = &uart0;
+ };
+
+ chosen {
+ bootargs = "console=ttyS0,115200n8 debug earlyprintk lpj=50000 rdinit=/bin/ash rw root=/dev/ram0 initrd=0x85000000,9M";
+ };
+
+ memory {
+ reg = <0x80000000 0x8000000>;
+ };
+
+ cpus {
+ interrupt-parent = <&gic>;
+
+ cpu@0 {
+ compatible = "arm,cortex-a15";
+ };
+
+ cpu@1 {
+ compatible = "arm,cortex-a15";
+ };
+
+ cpu@2 {
+ compatible = "arm,cortex-a15";
+ };
+
+ cpu@3 {
+ compatible = "arm,cortex-a15";
+ };
+
+ };
+
+ soc {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+ compatible = "ti,keystone","simple-bus";
+ interrupt-parent = <&gic>;
+
+ gic: interrupt-controller@02560000 {
+ compatible = "arm,cortex-a15-gic";
+ #interrupt-cells = <3>;
+ #size-cells = <0>;
+ #address-cells = <1>;
+ interrupt-controller;
+ reg = <0x02561000 0x1000>,
+ <0x02562000 0x2000>;
+ };
+
+ timer {
+ compatible = "arm,armv7-timer";
+ interrupts = <1 13 0xf08 1 14 0xf08>;
+ clock-frequency = <10000000>; /* Freq in Hz - optional */
+ };
+
+ uart0: serial@02530c00 {
+ compatible = "ns16550a";
+ current-speed = <115200>;
+ reg-shift = <2>;
+ reg-io-width = <4>;
+ reg = <0x02530c00 0x100>;
+ clock-frequency = <48000000>;
+ interrupts = <0 277 0xf01>;
+ };
+ };
+};
diff --git a/arch/arm/configs/keystone_defconfig b/arch/arm/configs/keystone_defconfig
new file mode 100644
index 0000000..7f2a04b
--- /dev/null
+++ b/arch/arm/configs/keystone_defconfig
@@ -0,0 +1,20 @@
+CONFIG_EXPERIMENTAL=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_ARCH_KEYSTONE=y
+CONFIG_ARM_ARCH_TIMER=y
+CONFIG_AEABI=y
+CONFIG_HIGHMEM=y
+CONFIG_VFP=y
+CONFIG_NEON=y
+# CONFIG_SUSPEND is not set
+CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_BLK_DEV_RAM=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_OF_PLATFORM=y
+CONFIG_PRINTK_TIME=y
+CONFIG_DEBUG_KERNEL=y
+CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_USER=y
+CONFIG_DEBUG_LL=y
+CONFIG_EARLY_PRINTK=y
diff --git a/arch/arm/mach-keystone/Makefile b/arch/arm/mach-keystone/Makefile
new file mode 100644
index 0000000..d4671d5
--- /dev/null
+++ b/arch/arm/mach-keystone/Makefile
@@ -0,0 +1 @@
+obj-y := keystone.o
diff --git a/arch/arm/mach-keystone/Makefile.boot b/arch/arm/mach-keystone/Makefile.boot
new file mode 100644
index 0000000..dae9661
--- /dev/null
+++ b/arch/arm/mach-keystone/Makefile.boot
@@ -0,0 +1 @@
+zreladdr-y := 0x00008000
diff --git a/arch/arm/mach-keystone/include/mach/debug-macro.S b/arch/arm/mach-keystone/include/mach/debug-macro.S
new file mode 100644
index 0000000..1108210
--- /dev/null
+++ b/arch/arm/mach-keystone/include/mach/debug-macro.S
@@ -0,0 +1,44 @@
+/*
+ * Debugging macro include header
+ *
+ * Copyright 2010-2012 Texas Instruments, Inc.
+ * Copyright (C) 1994-1999 Russell King
+ * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ *
+ * 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.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/serial_reg.h>
+
+#define UART_SHIFT 2
+
+ .macro addruart,rp,rv,tmp
+ movw \rv, #0x0c00
+ movt \rv, #0xfed3
+ movw \rp, #0x0c00
+ movt \rp, #0x0253
+ .endm
+
+
+ .macro senduart,rd,rx
+ str \rd, [\rx, #UART_TX << UART_SHIFT]
+ .endm
+
+ .macro busyuart,rd,rx
+1002: ldr \rd, [\rx, #UART_LSR << UART_SHIFT]
+ and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
+ teq \rd, #UART_LSR_TEMT | UART_LSR_THRE
+ bne 1002b
+ .endm
+
+ .macro waituart,rd,rx
+ .endm
diff --git a/arch/arm/mach-keystone/include/mach/memory.h b/arch/arm/mach-keystone/include/mach/memory.h
new file mode 100644
index 0000000..7c78b1e
--- /dev/null
+++ b/arch/arm/mach-keystone/include/mach/memory.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright 2010-2012 Texas Instruments, Inc.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __ASM_MACH_MEMORY_H
+#define __ASM_MACH_MEMORY_H
+
+#define MAX_PHYSMEM_BITS 36
+#define SECTION_SIZE_BITS 34
+
+#endif /* __ASM_MACH_MEMORY_H */
diff --git a/arch/arm/mach-keystone/include/mach/timex.h b/arch/arm/mach-keystone/include/mach/timex.h
new file mode 100644
index 0000000..f355ecb
--- /dev/null
+++ b/arch/arm/mach-keystone/include/mach/timex.h
@@ -0,0 +1,21 @@
+/*
+ * Copyright 2010-2012 Texas Instruments, Inc.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __MACH_TIMEX_H
+#define __MACH_TIMEX_H
+
+#define CLOCK_TICK_RATE 1000000
+
+#endif
diff --git a/arch/arm/mach-keystone/include/mach/uncompress.h b/arch/arm/mach-keystone/include/mach/uncompress.h
new file mode 100644
index 0000000..1071761
--- /dev/null
+++ b/arch/arm/mach-keystone/include/mach/uncompress.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2010-2012 Texas Instruments, Inc.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __MACH_UNCOMPRESS_H
+#define __MACH_UNCOMPRESS_H
+
+#define putc(c)
+#define flush()
+#define arch_decomp_setup()
+#define arch_decomp_wdog()
+
+#endif
diff --git a/arch/arm/mach-keystone/keystone.c b/arch/arm/mach-keystone/keystone.c
new file mode 100644
index 0000000..4bc60ec
--- /dev/null
+++ b/arch/arm/mach-keystone/keystone.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2010-2012 Texas Instruments, Inc.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/init.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+
+#include <asm/setup.h>
+#include <asm/mach/map.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+#include <asm/arch_timer.h>
+#include <asm/hardware/gic.h>
+
+static struct map_desc io_desc[] = {
+ {
+ .virtual = 0xfe800000UL,
+ .pfn = __phys_to_pfn(0x02000000UL),
+ .length = 0x800000UL,
+ .type = MT_DEVICE
+ },
+};
+
+static void __init keystone_map_io(void)
+{
+ iotable_init(io_desc, sizeof(io_desc)/sizeof(struct map_desc));
+}
+
+static const struct of_device_id irq_match[] = {
+ { .compatible = "arm,cortex-a15-gic", .data = gic_of_init, },
+ {}
+};
+
+static void __init keystone_init_irq(void)
+{
+ of_irq_init(irq_match);
+}
+
+
+static void __init keystone_timer_init(void)
+{
+ arch_timer_of_register();
+ arch_timer_sched_clock_init();
+}
+
+static struct sys_timer keystone_timer = {
+ .init = keystone_timer_init,
+};
+
+
+static void __init keystone_init(void)
+{
+ of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+}
+
+static const char *keystone_match[] __initconst = {
+ "ti,keystone-evm",
+ NULL,
+};
+
+DT_MACHINE_START(KEYSTONE, "Keystone")
+ .map_io = keystone_map_io,
+ .init_irq = keystone_init_irq,
+ .timer = &keystone_timer,
+ .handle_irq = gic_handle_irq,
+ .init_machine = keystone_init,
+ .dt_compat = keystone_match,
+MACHINE_END
--
1.7.9.5


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