Commit 4e3fea4a authored by Jingchang Lu's avatar Jingchang Lu Committed by Shawn Guo

ARM: imx: Add Freescale LS1021A SMP support

Freescale LS1021A SoCs deploy two cortex-A7 processors,
this adds bring-up support for the secondary core.
Signed-off-by: default avatarJingchang Lu <b35083@freescale.com>
Signed-off-by: default avatarShawn Guo <shawn.guo@linaro.org>
parent 7f0fb610
......@@ -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
......
......@@ -158,5 +158,6 @@ static inline void imx_init_l2cache(void) {}
#endif
extern struct smp_operations imx_smp_ops;
extern struct smp_operations ls1021a_smp_ops;
#endif
......@@ -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
......@@ -11,7 +11,10 @@
*/
#include <linux/init.h>
#include <linux/of_address.h>
#include <linux/of.h>
#include <linux/smp.h>
#include <asm/cacheflush.h>
#include <asm/page.h>
#include <asm/smp_scu.h>
......@@ -94,3 +97,33 @@ 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,
};
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