From: Jingchang Lu <b35083@xxxxxxxxxxxxx> Freescale LS1021A SoCs deploy two cortex-A7 processors, this adds bring-up support for the secondary core. Signed-off-by: Jingchang Lu <b35083@xxxxxxxxxxxxx> --- arch/arm/mach-imx/Makefile | 2 +- arch/arm/mach-imx/common.h | 1 + arch/arm/mach-imx/mach-ls1021a.c | 1 + arch/arm/mach-imx/platsmp.c | 32 ++++++++++++++++++++++++++++++++ 4 files changed, 35 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile index ce137bc..38d75e2 100644 --- a/arch/arm/mach-imx/Makefile +++ b/arch/arm/mach-imx/Makefile @@ -89,7 +89,7 @@ obj-$(CONFIG_HAVE_IMX_ANATOP) += anatop.o obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o obj-$(CONFIG_HAVE_IMX_MMDC) += mmdc.o obj-$(CONFIG_HAVE_IMX_SRC) += src.o -ifdef CONFIG_SOC_IMX6 +ifneq ($(CONFIG_SOC_IMX6)$(CONFIG_SOC_LS1021A),) AFLAGS_headsmp.o :=-Wa,-march=armv7-a obj-$(CONFIG_SMP) += headsmp.o platsmp.o obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h index 1dabf43..c473ca5 100644 --- a/arch/arm/mach-imx/common.h +++ b/arch/arm/mach-imx/common.h @@ -157,5 +157,6 @@ static inline void imx_init_l2cache(void) {} #endif extern struct smp_operations imx_smp_ops; +extern struct smp_operations ls1021a_smp_ops; #endif diff --git a/arch/arm/mach-imx/mach-ls1021a.c b/arch/arm/mach-imx/mach-ls1021a.c index 9d2034b..b89c858 100644 --- a/arch/arm/mach-imx/mach-ls1021a.c +++ b/arch/arm/mach-imx/mach-ls1021a.c @@ -17,5 +17,6 @@ static const char * const ls1021a_dt_compat[] __initconst = { }; DT_MACHINE_START(LS1021A, "Freescale LS1021A") + .smp = smp_ops(ls1021a_smp_ops), .dt_compat = ls1021a_dt_compat, MACHINE_END diff --git a/arch/arm/mach-imx/platsmp.c b/arch/arm/mach-imx/platsmp.c index 771bd25..62376f0 100644 --- a/arch/arm/mach-imx/platsmp.c +++ b/arch/arm/mach-imx/platsmp.c @@ -16,6 +16,8 @@ #include <asm/page.h> #include <asm/smp_scu.h> #include <asm/mach/map.h> +#include <linux/of.h> +#include <linux/of_address.h> #include "common.h" #include "hardware.h" @@ -94,3 +96,33 @@ struct smp_operations imx_smp_ops __initdata = { .cpu_kill = imx_cpu_kill, #endif }; + +#define DCFG_CCSR_SCRATCHRW1 0x200 + +static int ls1021a_boot_secondary(unsigned int cpu, struct task_struct *idle) +{ + arch_send_wakeup_ipi_mask(cpumask_of(cpu)); + + return 0; +} + +static void __init ls1021a_smp_prepare_cpus(unsigned int max_cpus) +{ + struct device_node *np; + void __iomem *dcfg_base; + unsigned long paddr; + + np = of_find_compatible_node(NULL, NULL, "fsl,ls1021a-dcfg"); + dcfg_base = of_iomap(np, 0); + BUG_ON(!dcfg_base); + + paddr = virt_to_phys(secondary_startup); + writel_relaxed(cpu_to_be32(paddr), dcfg_base + DCFG_CCSR_SCRATCHRW1); + + iounmap(dcfg_base); +} + +struct smp_operations ls1021a_smp_ops __initdata = { + .smp_prepare_cpus = ls1021a_smp_prepare_cpus, + .smp_boot_secondary = ls1021a_boot_secondary, +}; -- 1.8.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html