ARM: EXYNOS4: Add support Core1 Power On/Off with hotplug in/out

To insert the code for power on/off with pmu control to support hotplug in/out core1
As for hotplug.c, the codes for core1 to be hotplug in/out is inserted.
As for regs-pmu.h, S5P_CORE_LOCAL_PWR_EN is defined.
As for platsmp.c, the codes for core1 to be powered on is inserted.

Signed-off-by: JungHi Min <junghi.min@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 29 insertions, 1 deletions

diff --git a/arch/arm/mach-exynos4/platsmp.c b/arch/arm/mach-exynos4/platsmp.c
index a79863c..a7f312c 100644
--- a/arch/arm/mach-exynos4/platsmp.c
+++ b/arch/arm/mach-exynos4/platsmp.c
@@ -28,9 +28,12 @@
 
 #include <mach/hardware.h>
 #include <mach/regs-clock.h>
+#include <mach/regs-pmu.h>
 
 extern void exynos4_secondary_startup(void);
 
+#define CPU1_BOOT_REG S5P_VA_SYSRAM
+
 /*
  * control for which core is the next to come out of the secondary
  * boot "holding pen"
@@ -125,16 +128,41 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
 	 */
 	write_pen_release(cpu);
 
+	if (!(__raw_readl(S5P_ARM_CORE1_STATUS) & S5P_CORE_LOCAL_PWR_EN)) {
+		__raw_writel(S5P_CORE_LOCAL_PWR_EN,
+			     S5P_ARM_CORE1_CONFIGURATION);
+
+		timeout = 10;
+
+		/* wait max 10 ms until cpu1 is on */
+		while ((__raw_readl(S5P_ARM_CORE1_STATUS)
+			& S5P_CORE_LOCAL_PWR_EN) != S5P_CORE_LOCAL_PWR_EN) {
+			if (timeout-- == 0)
+				break;
+
+			mdelay(1);
+		}
+
+		if (timeout == 0) {
+			printk(KERN_ERR "cpu1 power enable failed");
+			spin_unlock(&boot_lock);
+			return -ETIMEDOUT;
+		}
+	}
 	/*
 	 * Send the secondary CPU a soft interrupt, thereby causing
 	 * the boot monitor to read the system wide flags register,
 	 * and branch to the address found there.
 	 */
-	gic_raise_softirq(cpumask_of(cpu), 1);
 
 	timeout = jiffies + (1 * HZ);
 	while (time_before(jiffies, timeout)) {
 		smp_rmb();
+
+		__raw_writel(BSYM(virt_to_phys(exynos4_secondary_startup)),
+			CPU1_BOOT_REG);
+		gic_raise_softirq(cpumask_of(cpu), 1);
+
 		if (pen_release == -1)
 			break;