Merge tag 'renesas-smp-for-v3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/renesas

From Simon Horman:
Renesas ARM based SoC SMP updates for v3.12

* Per-CPU SMP boot and sleep code on SoCs that use SCU
* Shared SCU CPU Hotplug code on r8a7779 and sh73a0 SoCs
* Shared SCU CPU boot code on emev2, r8a7779 and sh73a0 SoCs

* tag 'renesas-smp-for-v3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  ARM: shmobile: Per-CPU SMP boot / sleep code for SCU SoCs
  ARM: shmobile: Introduce per-CPU SMP boot / sleep code
  ARM: shmobile: Use shared SCU CPU Hotplug code on r8a7779
  ARM: shmobile: Use shared SCU CPU Hotplug code on sh73a0
  ARM: shmobile: Add shared SCU CPU Hotplug code
  ARM: shmobile: Use shared SCU SMP boot code on emev2
  ARM: shmobile: Use shared SCU SMP boot code on r8a7779
  ARM: shmobile: Use shared SCU SMP boot code on sh73a0
  ARM: shmobile: Introduce shared SCU SMP boot code

Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 16 insertions, 51 deletions

diff --git a/arch/arm/mach-shmobile/smp-sh73a0.c b/arch/arm/mach-shmobile/smp-sh73a0.c
index d2b89f7e5daf..0baa24443793 100644
--- a/arch/arm/mach-shmobile/smp-sh73a0.c
+++ b/arch/arm/mach-shmobile/smp-sh73a0.c
@@ -20,14 +20,11 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/smp.h>
-#include <linux/spinlock.h>
 #include <linux/io.h>
 #include <linux/delay.h>
 #include <mach/common.h>
-#include <asm/cacheflush.h>
-#include <asm/smp_plat.h>
 #include <mach/sh73a0.h>
-#include <asm/smp_scu.h>
+#include <asm/smp_plat.h>
 #include <asm/smp_twd.h>
 
 #define WUPCR		IOMEM(0xe6151010)
@@ -36,8 +33,6 @@
 #define SBAR		IOMEM(0xe6180020)
 #define APARMBAREA	IOMEM(0xe6f10020)
 
-#define PSTR_SHUTDOWN_MODE	3
-
 #define SH73A0_SCU_BASE 0xf0000000
 
 #ifdef CONFIG_HAVE_ARM_TWD
@@ -50,63 +45,33 @@ void __init sh73a0_register_twd(void)
 
 static int sh73a0_boot_secondary(unsigned int cpu, struct task_struct *idle)
 {
-	cpu = cpu_logical_map(cpu);
+	unsigned int lcpu = cpu_logical_map(cpu);
+	int ret;
 
-	if (((__raw_readl(PSTR) >> (4 * cpu)) & 3) == 3)
-		__raw_writel(1 << cpu, WUPCR);	/* wake up */
+	ret = shmobile_smp_scu_boot_secondary(cpu, idle);
+	if (ret)
+		return ret;
+
+	if (((__raw_readl(PSTR) >> (4 * lcpu)) & 3) == 3)
+		__raw_writel(1 << lcpu, WUPCR);	/* wake up */
 	else
-		__raw_writel(1 << cpu, SRESCR);	/* reset */
+		__raw_writel(1 << lcpu, SRESCR);	/* reset */
 
 	return 0;
 }
 
 static void __init sh73a0_smp_prepare_cpus(unsigned int max_cpus)
 {
-	/* setup sh73a0 specific SCU base */
-	shmobile_scu_base = IOMEM(SH73A0_SCU_BASE);
-	scu_enable(shmobile_scu_base);
-
-	/* Map the reset vector (in headsmp-scu.S, headsmp.S) */
+	/* Map the reset vector (in headsmp.S) */
 	__raw_writel(0, APARMBAREA);      /* 4k */
 	__raw_writel(__pa(shmobile_boot_vector), SBAR);
-	shmobile_boot_fn = virt_to_phys(shmobile_boot_scu);
-	shmobile_boot_arg = (unsigned long)shmobile_scu_base;
 
-	/* enable cache coherency on booting CPU */
-	scu_power_mode(shmobile_scu_base, SCU_PM_NORMAL);
+	/* setup sh73a0 specific SCU bits */
+	shmobile_scu_base = IOMEM(SH73A0_SCU_BASE);
+	shmobile_smp_scu_prepare_cpus(max_cpus);
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
-static int sh73a0_cpu_kill(unsigned int cpu)
-{
-
-	int k;
-	u32 pstr;
-
-	/*
-	 * wait until the power status register confirms the shutdown of the
-	 * offline target
-	 */
-	for (k = 0; k < 1000; k++) {
-		pstr = (__raw_readl(PSTR) >> (4 * cpu)) & 3;
-		if (pstr == PSTR_SHUTDOWN_MODE)
-			return 1;
-
-		mdelay(1);
-	}
-
-	return 0;
-}
-
-static void sh73a0_cpu_die(unsigned int cpu)
-{
-	/* Set power off mode. This takes the CPU out of the MP cluster */
-	scu_power_mode(shmobile_scu_base, SCU_PM_POWEROFF);
-
-	/* Enter shutdown mode */
-	cpu_do_idle();
-}
-
 static int sh73a0_cpu_disable(unsigned int cpu)
 {
 	return 0; /* CPU0 and CPU1 supported */
@@ -117,8 +82,8 @@ struct smp_operations sh73a0_smp_ops __initdata = {
 	.smp_prepare_cpus	= sh73a0_smp_prepare_cpus,
 	.smp_boot_secondary	= sh73a0_boot_secondary,
 #ifdef CONFIG_HOTPLUG_CPU
-	.cpu_kill		= sh73a0_cpu_kill,
-	.cpu_die		= sh73a0_cpu_die,
 	.cpu_disable		= sh73a0_cpu_disable,
+	.cpu_die		= shmobile_smp_scu_cpu_die,
+	.cpu_kill		= shmobile_smp_scu_cpu_kill,
 #endif
 };