From: Jingchang Lu <b35083@xxxxxxxxxxxxx>
Freescale LS1021A SoC deploys two cortex-A7 processors,
this adds bring-up support for the secondary core.
Signed-off-by: Jingchang Lu <b35083@xxxxxxxxxxxxx>
---
arch/arm/mach-imx/common.h | 2 ++
arch/arm/mach-imx/mach-ls1021a.c | 1 +
arch/arm/mach-imx/platsmp.c | 32 ++++++++++++++++++++++++++++++++
3 files changed, 35 insertions(+)
diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
index 22ba897..460ae4c 100644
--- a/arch/arm/mach-imx/common.h
+++ b/arch/arm/mach-imx/common.h
@@ -99,6 +99,7 @@ void v7_secondary_startup(void);
void imx_scu_map_io(void);
void imx_smp_prepare(void);
void imx_scu_standby_enable(void);
+void secondary_startup(void);
#else
static inline void imx_scu_map_io(void) {}
static inline void imx_smp_prepare(void) {}
@@ -159,5 +160,6 @@ 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 2ffc20f..d284cdb 100644
--- a/arch/arm/mach-imx/mach-ls1021a.c
+++ b/arch/arm/mach-imx/mach-ls1021a.c
@@ -27,6 +27,7 @@ DT_MACHINE_START(LS1021A, "Freescale LS1021A")
#ifdef CONFIG_ZONE_DMA
.dma_zone_size = SZ_128M,
#endif
+ .smp = smp_ops(ls1021a_smp_ops),
.init_machine = ls1021a_init_machine,
.dt_compat = ls1021a_dt_compat,
.restart = mxc_restart,
diff --git a/arch/arm/mach-imx/platsmp.c b/arch/arm/mach-imx/platsmp.c
index 5b57c17..bf2a926 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"
@@ -104,3 +106,33 @@ 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
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