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[157/237] ARM: shmobile: Add r8a7790 SMP support using APMU code

Message ID 1387000406-29111-158-git-send-email-horms+renesas@verge.net.au (mailing list archive)
State New, archived
Headers show

Commit Message

Simon Horman Dec. 14, 2013, 5:52 a.m. UTC 
From: Magnus Damm <damm@opensource.se>

Add r8a7790 SMP support using the shared APMU code. To enable
SMP the r8a7790 specific DTS needs to be updated to include
CPU cores, and this is happening in a separate patch.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
(cherry picked from commit ad09cb83811b228eb6f98230d307bb837e6a758f)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
---
 arch/arm/mach-shmobile/Makefile                |  1 +
 arch/arm/mach-shmobile/board-lager-reference.c |  1 +
 arch/arm/mach-shmobile/board-lager.c           |  1 +
 arch/arm/mach-shmobile/include/mach/r8a7790.h  |  1 +
 arch/arm/mach-shmobile/setup-r8a7790.c         |  1 +
 arch/arm/mach-shmobile/smp-r8a7790.c           | 67 ++++++++++++++++++++++++++
 6 files changed, 72 insertions(+)
 create mode 100644 arch/arm/mach-shmobile/smp-r8a7790.c
diff mbox

Patch

diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile
index e552e84..f8f6992 100644
--- a/arch/arm/mach-shmobile/Makefile
+++ b/arch/arm/mach-shmobile/Makefile
@@ -36,6 +36,7 @@  endif
 smp-y				:= platsmp.o headsmp.o
 smp-$(CONFIG_ARCH_SH73A0)	+= smp-sh73a0.o headsmp-scu.o platsmp-scu.o
 smp-$(CONFIG_ARCH_R8A7779)	+= smp-r8a7779.o headsmp-scu.o platsmp-scu.o
+smp-$(CONFIG_ARCH_R8A7790)	+= smp-r8a7790.o platsmp-apmu.o
 smp-$(CONFIG_ARCH_EMEV2)	+= smp-emev2.o headsmp-scu.o platsmp-scu.o
 
 # IRQ objects
diff --git a/arch/arm/mach-shmobile/board-lager-reference.c b/arch/arm/mach-shmobile/board-lager-reference.c
index 2856f51..d39a91b 100644
--- a/arch/arm/mach-shmobile/board-lager-reference.c
+++ b/arch/arm/mach-shmobile/board-lager-reference.c
@@ -38,6 +38,7 @@  static const char *lager_boards_compat_dt[] __initdata = {
 };
 
 DT_MACHINE_START(LAGER_DT, "lager")
+	.smp		= smp_ops(r8a7790_smp_ops),
 	.init_early	= r8a7790_init_early,
 	.init_machine	= lager_add_standard_devices,
 	.init_time	= r8a7790_timer_init,
diff --git a/arch/arm/mach-shmobile/board-lager.c b/arch/arm/mach-shmobile/board-lager.c
index 245ce5b..ba90fea 100644
--- a/arch/arm/mach-shmobile/board-lager.c
+++ b/arch/arm/mach-shmobile/board-lager.c
@@ -254,6 +254,7 @@  static const char *lager_boards_compat_dt[] __initdata = {
 };
 
 DT_MACHINE_START(LAGER_DT, "lager")
+	.smp		= smp_ops(r8a7790_smp_ops),
 	.init_early	= r8a7790_init_early,
 	.init_time	= r8a7790_timer_init,
 	.init_machine	= lager_init,
diff --git a/arch/arm/mach-shmobile/include/mach/r8a7790.h b/arch/arm/mach-shmobile/include/mach/r8a7790.h
index 177a837..79e731c 100644
--- a/arch/arm/mach-shmobile/include/mach/r8a7790.h
+++ b/arch/arm/mach-shmobile/include/mach/r8a7790.h
@@ -7,6 +7,7 @@  void r8a7790_clock_init(void);
 void r8a7790_pinmux_init(void);
 void r8a7790_init_early(void);
 void r8a7790_timer_init(void);
+extern struct smp_operations r8a7790_smp_ops;
 
 #define MD(nr) BIT(nr)
 u32 r8a7790_read_mode_pins(void);
diff --git a/arch/arm/mach-shmobile/setup-r8a7790.c b/arch/arm/mach-shmobile/setup-r8a7790.c
index e0d29a2..c7e24ef 100644
--- a/arch/arm/mach-shmobile/setup-r8a7790.c
+++ b/arch/arm/mach-shmobile/setup-r8a7790.c
@@ -283,6 +283,7 @@  static const char * const r8a7790_boards_compat_dt[] __initconst = {
 };
 
 DT_MACHINE_START(R8A7790_DT, "Generic R8A7790 (Flattened Device Tree)")
+	.smp		= smp_ops(r8a7790_smp_ops),
 	.init_early	= r8a7790_init_early,
 	.init_time	= r8a7790_timer_init,
 	.dt_compat	= r8a7790_boards_compat_dt,
diff --git a/arch/arm/mach-shmobile/smp-r8a7790.c b/arch/arm/mach-shmobile/smp-r8a7790.c
new file mode 100644
index 0000000..015e275
--- /dev/null
+++ b/arch/arm/mach-shmobile/smp-r8a7790.c
@@ -0,0 +1,67 @@ 
+/*
+ * SMP support for r8a7790
+ *
+ * Copyright (C) 2012-2013 Renesas Solutions Corp.
+ * Copyright (C) 2012 Takashi Yoshii <takashi.yoshii.ze@renesas.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that 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.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+#include <asm/smp_plat.h>
+#include <mach/common.h>
+
+#define RST		0xe6160000
+#define CA15BAR		0x0020
+#define CA7BAR		0x0030
+#define CA15RESCNT	0x0040
+#define CA7RESCNT	0x0044
+#define MERAM		0xe8080000
+
+static void __init r8a7790_smp_prepare_cpus(unsigned int max_cpus)
+{
+	void __iomem *p;
+	u32 bar;
+
+	/* let APMU code install data related to shmobile_boot_vector */
+	shmobile_smp_apmu_prepare_cpus(max_cpus);
+
+	/* MERAM for jump stub, because BAR requires 256KB aligned address */
+	p = ioremap_nocache(MERAM, shmobile_boot_size);
+	memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);
+	iounmap(p);
+
+	/* setup reset vectors */
+	p = ioremap_nocache(RST, 0x63);
+	bar = (MERAM >> 8) & 0xfffffc00;
+	writel_relaxed(bar, p + CA15BAR);
+	writel_relaxed(bar, p + CA7BAR);
+	writel_relaxed(bar | 0x10, p + CA15BAR);
+	writel_relaxed(bar | 0x10, p + CA7BAR);
+
+	/* enable clocks to all CPUs */
+	writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) | 0xa5a50000,
+		       p + CA15RESCNT);
+	writel_relaxed((readl_relaxed(p + CA7RESCNT) & ~0x0f) | 0x5a5a0000,
+		       p + CA7RESCNT);
+	iounmap(p);
+}
+
+struct smp_operations r8a7790_smp_ops __initdata = {
+	.smp_prepare_cpus	= r8a7790_smp_prepare_cpus,
+	.smp_boot_secondary	= shmobile_smp_apmu_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+	.cpu_disable		= shmobile_smp_cpu_disable,
+	.cpu_die		= shmobile_smp_apmu_cpu_die,
+	.cpu_kill		= shmobile_smp_apmu_cpu_kill,
+#endif
+};