@@ -963,6 +963,8 @@ source "arch/arm/mach-tegra/Kconfig"
source "arch/arm/mach-u300/Kconfig"
+source "arch/arm/mach-uniphier/Kconfig"
+
source "arch/arm/mach-ux500/Kconfig"
source "arch/arm/mach-versatile/Kconfig"
@@ -201,6 +201,7 @@ machine-$(CONFIG_ARCH_SUNXI) += sunxi
machine-$(CONFIG_ARCH_TEGRA) += tegra
machine-$(CONFIG_ARCH_U300) += u300
machine-$(CONFIG_ARCH_U8500) += ux500
+machine-$(CONFIG_ARCH_UNIPHIER) += uniphier
machine-$(CONFIG_ARCH_VERSATILE) += versatile
machine-$(CONFIG_ARCH_VEXPRESS) += vexpress
machine-$(CONFIG_ARCH_VT8500) += vt8500
new file mode 100644
@@ -0,0 +1,11 @@
+config ARCH_UNIPHIER
+ bool "Socionext UniPhier SoCs"
+ depends on ARCH_MULTI_V7
+ select ARM_AMBA
+ select ARM_GLOBAL_TIMER
+ select ARM_GIC
+ select HAVE_ARM_SCU
+ select HAVE_ARM_TWD
+ help
+ Support for UniPhier SoC family developed by Socionext Inc.
+ (formerly, System LSI Business Division of Panasonic Corporation)
new file mode 100644
@@ -0,0 +1,2 @@
+obj-y := uniphier.o
+obj-$(CONFIG_SMP) += platsmp.o
new file mode 100644
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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/sizes.h>
+#include <linux/compiler.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <asm/smp.h>
+#include <asm/smp_scu.h>
+
+static void __init uniphier_smp_prepare_cpus(unsigned int max_cpus)
+{
+ static cpumask_t only_cpu_0 = { CPU_BITS_CPU0 };
+ unsigned long scu_base_phys = 0;
+ void __iomem *scu_base;
+
+ if (scu_a9_has_base())
+ scu_base_phys = scu_a9_get_base();
+
+ if (!scu_base_phys) {
+ pr_err("failed to get scu base\n");
+ goto err;
+ }
+
+ scu_base = ioremap(scu_base_phys, SZ_128);
+ if (!scu_base) {
+ pr_err("failed to remap scu base (0x%08lx)\n", scu_base_phys);
+ goto err;
+ }
+
+ scu_enable(scu_base);
+ iounmap(scu_base);
+
+ return;
+err:
+ pr_warn("disabling SMP\n");
+ init_cpu_present(&only_cpu_0);
+}
+
+static void __naked uniphier_secondary_startup(void)
+{
+ asm("bl v7_invalidate_l1\n"
+ "b secondary_startup\n");
+};
+
+static int uniphier_boot_secondary(unsigned int cpu,
+ struct task_struct *idle)
+{
+ struct regmap *sbcm_regmap;
+ int ret;
+
+ sbcm_regmap = syscon_regmap_lookup_by_compatible(
+ "socionext,uniphier-system-bus-controller-misc");
+ if (IS_ERR(sbcm_regmap)) {
+ pr_err("failed to regmap system-bus-controller-misc\n");
+ return PTR_ERR(sbcm_regmap);
+ }
+
+ ret = regmap_write(sbcm_regmap, 0x1208,
+ virt_to_phys(uniphier_secondary_startup));
+ if (!ret)
+ asm("sev"); /* wake up secondary CPU */
+
+ return ret;
+}
+
+struct smp_operations uniphier_smp_ops __initdata = {
+ .smp_prepare_cpus = uniphier_smp_prepare_cpus,
+ .smp_boot_secondary = uniphier_boot_secondary,
+};
+CPU_METHOD_OF_DECLARE(uniphier_smp, "socionext,uniphier-smp",
+ &uniphier_smp_ops);
new file mode 100644
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 <asm/mach/arch.h>
+
+static const char * const uniphier_dt_compat[] __initconst = {
+ "socionext,ph1-sld3",
+ "socionext,ph1-ld4",
+ "socionext,ph1-pro4",
+ "socionext,ph1-sld8",
+ "socionext,ph1-pro5",
+ "socionext,proxstream2",
+ "socionext,ph1-ld6b",
+ NULL,
+};
+
+DT_MACHINE_START(UNIPHIER, "Socionext UniPhier")
+ .dt_compat = uniphier_dt_compat,
+MACHINE_END
Initial commit for a new SoC family, UniPhier, developed by Socionext Inc. (formerly, System LSI Business Division of Panasonic Corporation). This commit includes a minimal set of components for booting the kernel, including SMP support. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> --- Changes in v4: - Access to SMP register with base + offset(0x1208). Changes in v3: - Replace <asm/io.h> with <linux/io.h> - Rename uniphier_board_dt_compat to uniphier_dt_compat - Move uniphier_secondary_startup into platsmp.c as __naked function - Add return before "err:" label (bug fix) - Use syscon driver rather than hard-coded register address Changes in v2: - Fix SoC compatible string "socionext,ph1-proxstream2" -> "socionext,proxstream2" arch/arm/Kconfig | 2 + arch/arm/Makefile | 1 + arch/arm/mach-uniphier/Kconfig | 11 +++++ arch/arm/mach-uniphier/Makefile | 2 + arch/arm/mach-uniphier/platsmp.c | 85 +++++++++++++++++++++++++++++++++++++++ arch/arm/mach-uniphier/uniphier.c | 30 ++++++++++++++ 6 files changed, 131 insertions(+) create mode 100644 arch/arm/mach-uniphier/Kconfig create mode 100644 arch/arm/mach-uniphier/Makefile create mode 100644 arch/arm/mach-uniphier/platsmp.c create mode 100644 arch/arm/mach-uniphier/uniphier.c