diff options
Diffstat (limited to '')
| -rw-r--r-- | arch/arm/mach-realview/Kconfig | 103 | ||||
| -rw-r--r-- | arch/arm/mach-realview/Makefile | 8 | ||||
| -rw-r--r-- | arch/arm/mach-realview/platsmp-dt.c | 93 | ||||
| -rw-r--r-- | arch/arm/mach-realview/realview-dt.c | 27 |
4 files changed, 231 insertions, 0 deletions
diff --git a/arch/arm/mach-realview/Kconfig b/arch/arm/mach-realview/Kconfig new file mode 100644 index 000000000..5c6031b14 --- /dev/null +++ b/arch/arm/mach-realview/Kconfig @@ -0,0 +1,103 @@ +# SPDX-License-Identifier: GPL-2.0-only +menuconfig ARCH_REALVIEW + bool "ARM Ltd. RealView family" + depends on ARCH_MULTI_V5 || ARCH_MULTI_V6 || ARCH_MULTI_V7 + select ARM_AMBA + select ARM_GIC + select ARM_TIMER_SP804 + select CLK_SP810 + select GPIO_PL061 if GPIOLIB + select HAVE_ARM_SCU if SMP + select HAVE_ARM_TWD if SMP + select HAVE_PATA_PLATFORM + select HAVE_TCM + select ICST + select MACH_REALVIEW_EB if ARCH_MULTI_V5 + select MFD_SYSCON + select PLAT_VERSATILE + select POWER_RESET + select POWER_RESET_VERSATILE + select POWER_SUPPLY + select SOC_REALVIEW + help + This enables support for ARM Ltd RealView boards. + +if ARCH_REALVIEW + +config MACH_REALVIEW_EB + bool "Support RealView(R) Emulation Baseboard" + select ARM_GIC + select CPU_ARM926T if ARCH_MULTI_V5 + help + Include support for the ARM(R) RealView(R) Emulation Baseboard + platform. On an ARMv5 kernel, this will include support for + the ARM926EJ-S core tile, while on an ARMv6/v7 kernel, at least + one of the ARM1136, ARM1176, ARM11MPCore or Cortex-A9MPCore + core tile options should be enabled. + +config REALVIEW_EB_ARM1136 + bool "Support ARM1136J(F)-S Tile" + depends on MACH_REALVIEW_EB && ARCH_MULTI_V6 + select CPU_V6 + help + Enable support for the ARM1136 tile fitted to the + Realview(R) Emulation Baseboard platform. + +config REALVIEW_EB_ARM1176 + bool "Support ARM1176JZ(F)-S Tile" + depends on MACH_REALVIEW_EB && ARCH_MULTI_V6 + help + Enable support for the ARM1176 tile fitted to the + Realview(R) Emulation Baseboard platform. + +config REALVIEW_EB_A9MP + bool "Support Multicore Cortex-A9 Tile" + depends on MACH_REALVIEW_EB && ARCH_MULTI_V7 + help + Enable support for the Cortex-A9MPCore tile fitted to the + Realview(R) Emulation Baseboard platform. + +config REALVIEW_EB_ARM11MP + bool "Support ARM11MPCore Tile" + depends on MACH_REALVIEW_EB && ARCH_MULTI_V6 + select HAVE_SMP + help + Enable support for the ARM11MPCore tile fitted to the Realview(R) + Emulation Baseboard platform. + +config MACH_REALVIEW_PB11MP + bool "Support RealView(R) Platform Baseboard for ARM11MPCore" + depends on ARCH_MULTI_V6 + select HAVE_SMP + help + Include support for the ARM(R) RealView(R) Platform Baseboard for + the ARM11MPCore. This platform has an on-board ARM11MPCore and has + support for PCI-E and Compact Flash. + +# ARMv6 CPU without K extensions, but does have the new exclusive ops +config MACH_REALVIEW_PB1176 + bool "Support RealView(R) Platform Baseboard for ARM1176JZF-S" + depends on ARCH_MULTI_V6 + select CPU_V6 + select HAVE_TCM + help + Include support for the ARM(R) RealView(R) Platform Baseboard for + ARM1176JZF-S. + +config MACH_REALVIEW_PBA8 + bool "Support RealView(R) Platform Baseboard for Cortex(tm)-A8 platform" + depends on ARCH_MULTI_V7 + help + Include support for the ARM(R) RealView Platform Baseboard for + Cortex(tm)-A8. This platform has an on-board Cortex-A8 and has + support for PCI-E and Compact Flash. + +config MACH_REALVIEW_PBX + bool "Support RealView(R) Platform Baseboard Explore for Cortex-A9" + depends on ARCH_MULTI_V7 + select ZONE_DMA + help + Include support for the ARM(R) RealView(R) Platform Baseboard + Explore. + +endif diff --git a/arch/arm/mach-realview/Makefile b/arch/arm/mach-realview/Makefile new file mode 100644 index 000000000..e25909159 --- /dev/null +++ b/arch/arm/mach-realview/Makefile @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Makefile for the linux kernel. +# +ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := -I$(srctree)/arch/arm/plat-versatile/include + +obj-y += realview-dt.o +obj-$(CONFIG_SMP) += platsmp-dt.o diff --git a/arch/arm/mach-realview/platsmp-dt.c b/arch/arm/mach-realview/platsmp-dt.c new file mode 100644 index 000000000..5ae783767 --- /dev/null +++ b/arch/arm/mach-realview/platsmp-dt.c @@ -0,0 +1,93 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2015 Linus Walleij + */ +#include <linux/smp.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/regmap.h> +#include <linux/mfd/syscon.h> + +#include <asm/cacheflush.h> +#include <asm/smp_plat.h> +#include <asm/smp_scu.h> + +#include <plat/platsmp.h> + +#define REALVIEW_SYS_FLAGSSET_OFFSET 0x30 + +static const struct of_device_id realview_scu_match[] = { + { .compatible = "arm,arm11mp-scu", }, + { .compatible = "arm,cortex-a9-scu", }, + { .compatible = "arm,cortex-a5-scu", }, + { } +}; + +static const struct of_device_id realview_syscon_match[] = { + { .compatible = "arm,core-module-integrator", }, + { .compatible = "arm,realview-eb-syscon", }, + { .compatible = "arm,realview-pb11mp-syscon", }, + { .compatible = "arm,realview-pbx-syscon", }, + { }, +}; + +static void __init realview_smp_prepare_cpus(unsigned int max_cpus) +{ + struct device_node *np; + void __iomem *scu_base; + struct regmap *map; + unsigned int ncores; + int i; + + np = of_find_matching_node(NULL, realview_scu_match); + if (!np) { + pr_err("PLATSMP: No SCU base address\n"); + return; + } + scu_base = of_iomap(np, 0); + of_node_put(np); + if (!scu_base) { + pr_err("PLATSMP: No SCU remap\n"); + return; + } + + scu_enable(scu_base); + ncores = scu_get_core_count(scu_base); + pr_info("SCU: %d cores detected\n", ncores); + for (i = 0; i < ncores; i++) + set_cpu_possible(i, true); + iounmap(scu_base); + + /* The syscon contains the magic SMP start address registers */ + np = of_find_matching_node(NULL, realview_syscon_match); + if (!np) { + pr_err("PLATSMP: No syscon match\n"); + return; + } + map = syscon_node_to_regmap(np); + if (IS_ERR(map)) { + pr_err("PLATSMP: No syscon regmap\n"); + return; + } + /* Put the boot address in this magic register */ + regmap_write(map, REALVIEW_SYS_FLAGSSET_OFFSET, + __pa_symbol(versatile_secondary_startup)); +} + +#ifdef CONFIG_HOTPLUG_CPU +static void realview_cpu_die(unsigned int cpu) +{ + return versatile_immitation_cpu_die(cpu, 0x20); +} +#endif + +static const struct smp_operations realview_dt_smp_ops __initconst = { + .smp_prepare_cpus = realview_smp_prepare_cpus, + .smp_secondary_init = versatile_secondary_init, + .smp_boot_secondary = versatile_boot_secondary, +#ifdef CONFIG_HOTPLUG_CPU + .cpu_die = realview_cpu_die, +#endif +}; +CPU_METHOD_OF_DECLARE(realview_smp, "arm,realview-smp", &realview_dt_smp_ops); diff --git a/arch/arm/mach-realview/realview-dt.c b/arch/arm/mach-realview/realview-dt.c new file mode 100644 index 000000000..feab66080 --- /dev/null +++ b/arch/arm/mach-realview/realview-dt.c @@ -0,0 +1,27 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2014 Linaro Ltd. + * + * Author: Linus Walleij <linus.walleij@linaro.org> + */ +#include <linux/of_platform.h> +#include <asm/mach/arch.h> +#include <asm/hardware/cache-l2x0.h> + +static const char *const realview_dt_platform_compat[] __initconst = { + "arm,realview-eb", + "arm,realview-pb1176", + "arm,realview-pb11mp", + "arm,realview-pba8", + "arm,realview-pbx", + NULL, +}; + +DT_MACHINE_START(REALVIEW_DT, "ARM RealView Machine (Device Tree Support)") +#ifdef CONFIG_ZONE_DMA + .dma_zone_size = SZ_256M, +#endif + .dt_compat = realview_dt_platform_compat, + .l2c_aux_val = 0x0, + .l2c_aux_mask = ~0x0, +MACHINE_END |