From: Lubomir Rintel <lkundrak@v3.sk>
To: "To : Olof Johansson" <olof@lixom.net>
Cc: "Cc : Rob Herring" <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Jason Cooper <jason@lakedaemon.net>,
Kishon Vijay Abraham I <kishon@ti.com>,
Russell King <linux@armlinux.org.uk>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org,
Lubomir Rintel <lkundrak@v3.sk>
Subject: [PATCH v3 12/16] ARM: mmp: add SMP support
Date: Sat, 31 Aug 2019 00:07:39 +0200 [thread overview]
Message-ID: <20190830220743.439670-13-lkundrak@v3.sk> (raw)
In-Reply-To: <20190830220743.439670-1-lkundrak@v3.sk>
Used to bring up the second core on MMP3.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
---
Changes since v2:
- Wrap secondary_startup with __pa_symbol(), instead of
SW_BRANCH_VIRT_ADDR.
Changes since v1:
- Wrap SW_BRANCH_VIRT_ADDR with __pa_symbol()
arch/arm/mach-mmp/Makefile | 3 +++
arch/arm/mach-mmp/platsmp.c | 32 ++++++++++++++++++++++++++++++++
2 files changed, 35 insertions(+)
create mode 100644 arch/arm/mach-mmp/platsmp.c
diff --git a/arch/arm/mach-mmp/Makefile b/arch/arm/mach-mmp/Makefile
index 322c1c97dc900..7b3a7f979eece 100644
--- a/arch/arm/mach-mmp/Makefile
+++ b/arch/arm/mach-mmp/Makefile
@@ -22,6 +22,9 @@ ifeq ($(CONFIG_PM),y)
obj-$(CONFIG_CPU_PXA910) += pm-pxa910.o
obj-$(CONFIG_CPU_MMP2) += pm-mmp2.o
endif
+ifeq ($(CONFIG_SMP),y)
+obj-$(CONFIG_MACH_MMP3_DT) += platsmp.o
+endif
# board support
obj-$(CONFIG_MACH_ASPENITE) += aspenite.o
diff --git a/arch/arm/mach-mmp/platsmp.c b/arch/arm/mach-mmp/platsmp.c
new file mode 100644
index 0000000000000..c99405469bb4b
--- /dev/null
+++ b/arch/arm/mach-mmp/platsmp.c
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2019 Lubomir Rintel <lkundrak@v3.sk>
+ */
+#include <linux/io.h>
+#include <asm/smp_scu.h>
+#include <asm/smp.h>
+#include "addr-map.h"
+
+#define SW_BRANCH_VIRT_ADDR CIU_REG(0x24)
+
+static int mmp3_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+ /*
+ * Apparently, the boot ROM on the second core spins on this
+ * register becoming non-zero and then jumps to the address written
+ * there. No IPIs involved.
+ */
+ __raw_writel(__pa_symbol(secondary_startup), SW_BRANCH_VIRT_ADDR);
+ return 0;
+}
+
+static void mmp3_smp_prepare_cpus(unsigned int max_cpus)
+{
+ scu_enable(SCU_VIRT_BASE);
+}
+
+static const struct smp_operations mmp3_smp_ops __initconst = {
+ .smp_prepare_cpus = mmp3_smp_prepare_cpus,
+ .smp_boot_secondary = mmp3_boot_secondary,
+};
+CPU_METHOD_OF_DECLARE(mmp3_smp, "marvell,mmp3-smp", &mmp3_smp_ops);
--
2.21.0
next prev parent reply other threads:[~2019-08-30 22:17 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-30 22:07 [PATCH v3 00/16] Initial support for Marvell MMP3 SoC Lubomir Rintel
2019-08-30 22:07 ` [PATCH v3 01/16] dt-bindings: arm: cpu: Add Marvell MMP3 SMP enable method Lubomir Rintel
2019-08-30 22:07 ` [PATCH v3 02/16] dt-bindings: arm: Convert Marvell MMP board/soc bindings to json-schema Lubomir Rintel
2019-09-02 13:39 ` Rob Herring
2019-08-30 22:07 ` [PATCH v3 03/16] dt-bindings: arm: mrvl: Document MMP3 compatible string Lubomir Rintel
2019-08-30 22:07 ` [PATCH v3 04/16] dt-bindings: mrvl,intc: Add a MMP3 interrupt controller Lubomir Rintel
2019-08-30 22:07 ` [PATCH v3 05/16] dt-bindings: phy-mmp3-usb: Add bindings Lubomir Rintel
2019-08-30 22:07 ` [PATCH v3 06/16] ARM: l2c: add definition for FWA in PL310 aux register Lubomir Rintel
2019-08-30 22:07 ` [PATCH v3 07/16] ARM: mmp: don't select CACHE_TAUROS2 on all ARCH_MMP Lubomir Rintel
2019-08-30 22:07 ` [PATCH v3 08/16] ARM: mmp: map the PGU as well Lubomir Rintel
2019-08-30 22:07 ` [PATCH v3 09/16] ARM: mmp: DT: convert timer driver to use TIMER_OF_DECLARE Lubomir Rintel
2019-08-30 22:07 ` [PATCH v3 10/16] ARM: mmp: define MMP_CHIPID by the means of CIU_REG() Lubomir Rintel
2019-08-30 22:07 ` [PATCH v3 11/16] ARM: mmp: add support for MMP3 SoC Lubomir Rintel
2019-09-06 23:48 ` Stephen Boyd
2019-08-30 22:07 ` Lubomir Rintel [this message]
2019-08-30 22:07 ` [PATCH v3 13/16] ARM: mmp: move cputype.h to include/linux/soc/ Lubomir Rintel
2019-09-02 8:15 ` kbuild test robot
2019-09-05 10:20 ` Arnd Bergmann
2019-08-30 22:07 ` [PATCH v3 14/16] ARM: mmp: remove MMP3 USB PHY registers from regs-usb.h Lubomir Rintel
2019-08-30 22:07 ` [PATCH v3 15/16] phy: phy-mmp3-usb: add a new driver Lubomir Rintel
2019-10-10 8:58 ` Kishon Vijay Abraham I
2019-08-30 22:07 ` [PATCH v3 16/16] ARM: dts: mmp3: Add MMP3 SoC dts file Lubomir Rintel
2019-09-05 10:17 ` Arnd Bergmann
2019-09-05 10:24 ` [PATCH v3 00/16] Initial support for Marvell MMP3 SoC Arnd Bergmann
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