1 files changed, 35 insertions, 194 deletions

diff --git a/arch/arm/mach-realview/platsmp.c b/arch/arm/mach-realview/platsmp.c
index 30a9c68591f..98e3052b793 100644
--- a/arch/arm/mach-realview/platsmp.c
+++ b/arch/arm/mach-realview/platsmp.c
@@ -10,29 +10,20 @@
  */
 #include <linux/init.h>
 #include <linux/errno.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/jiffies.h>
 #include <linux/smp.h>
 #include <linux/io.h>
 
-#include <asm/cacheflush.h>
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
+#include <asm/smp_scu.h>
 
 #include <mach/board-eb.h>
 #include <mach/board-pb11mp.h>
-#include <mach/scu.h>
+#include <mach/board-pbx.h>
 
-#include "core.h"
-
-extern void realview_secondary_startup(void);
+#include <plat/platsmp.h>
 
-/*
- * control for which core is the next to come out of the secondary
- * boot "holding pen"
- */
-volatile int __cpuinitdata pen_release = -1;
+#include "core.h"
 
 static void __iomem *scu_base_addr(void)
 {
@@ -40,206 +31,56 @@ static void __iomem *scu_base_addr(void)
 		return __io_address(REALVIEW_EB11MP_SCU_BASE);
 	else if (machine_is_realview_pb11mp())
 		return __io_address(REALVIEW_TC11MP_SCU_BASE);
+	else if (machine_is_realview_pbx() &&
+		 (core_tile_pbx11mp() || core_tile_pbxa9mp()))
+		return __io_address(REALVIEW_PBX_TILE_SCU_BASE);
 	else
 		return (void __iomem *)0;
 }
 
-static unsigned int __init get_core_count(void)
-{
-	unsigned int ncores;
-	void __iomem *scu_base = scu_base_addr();
-
-	if (scu_base) {
-		ncores = __raw_readl(scu_base + SCU_CONFIG);
-		ncores = (ncores & 0x03) + 1;
-	} else
-		ncores = 1;
-
-	return ncores;
-}
-
 /*
- * Setup the SCU
+ * Initialise the CPU possible map early - this describes the CPUs
+ * which may be present or become present in the system.
  */
-static void scu_enable(void)
+static void __init realview_smp_init_cpus(void)
 {
-	u32 scu_ctrl;
 	void __iomem *scu_base = scu_base_addr();
+	unsigned int i, ncores;
 
-	scu_ctrl = __raw_readl(scu_base + SCU_CTRL);
-	scu_ctrl |= 1;
-	__raw_writel(scu_ctrl, scu_base + SCU_CTRL);
-}
-
-static DEFINE_SPINLOCK(boot_lock);
-
-void __cpuinit platform_secondary_init(unsigned int cpu)
-{
-	trace_hardirqs_off();
-
-	/*
-	 * if any interrupts are already enabled for the primary
-	 * core (e.g. timer irq), then they will not have been enabled
-	 * for us: do so
-	 */
-	gic_cpu_init(0, gic_cpu_base_addr);
-
-	/*
-	 * let the primary processor know we're out of the
-	 * pen, then head off into the C entry point
-	 */
-	pen_release = -1;
-	smp_wmb();
-
-	/*
-	 * Synchronise with the boot thread.
-	 */
-	spin_lock(&boot_lock);
-	spin_unlock(&boot_lock);
-}
-
-int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
-{
-	unsigned long timeout;
-
-	/*
-	 * set synchronisation state between this boot processor
-	 * and the secondary one
-	 */
-	spin_lock(&boot_lock);
-
-	/*
-	 * The secondary processor is waiting to be released from
-	 * the holding pen - release it, then wait for it to flag
-	 * that it has been released by resetting pen_release.
-	 *
-	 * Note that "pen_release" is the hardware CPU ID, whereas
-	 * "cpu" is Linux's internal ID.
-	 */
-	pen_release = cpu;
-	flush_cache_all();
-
-	/*
-	 * XXX
-	 *
-	 * This is a later addition to the booting protocol: the
-	 * bootMonitor now puts secondary cores into WFI, so
-	 * poke_milo() no longer gets the cores moving; we need
-	 * to send a soft interrupt to wake the secondary core.
-	 * Use smp_cross_call() for this, since there's little
-	 * point duplicating the code here
-	 */
-	smp_cross_call(cpumask_of(cpu));
-
-	timeout = jiffies + (1 * HZ);
-	while (time_before(jiffies, timeout)) {
-		smp_rmb();
-		if (pen_release == -1)
-			break;
+	ncores = scu_base ? scu_get_core_count(scu_base) : 1;
 
-		udelay(10);
+	/* sanity check */
+	if (ncores > nr_cpu_ids) {
+		pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
+			ncores, nr_cpu_ids);
+		ncores = nr_cpu_ids;
 	}
 
-	/*
-	 * now the secondary core is starting up let it run its
-	 * calibrations, then wait for it to finish
-	 */
-	spin_unlock(&boot_lock);
-
-	return pen_release != -1 ? -ENOSYS : 0;
-}
-
-static void __init poke_milo(void)
-{
-	extern void secondary_startup(void);
-
-	/* nobody is to be released from the pen yet */
-	pen_release = -1;
-
-	/*
-	 * write the address of secondary startup into the system-wide
-	 * flags register, then clear the bottom two bits, which is what
-	 * BootMonitor is waiting for
-	 */
-#if 1
-#define REALVIEW_SYS_FLAGSS_OFFSET 0x30
-	__raw_writel(virt_to_phys(realview_secondary_startup),
-		     __io_address(REALVIEW_SYS_BASE) +
-		     REALVIEW_SYS_FLAGSS_OFFSET);
-#define REALVIEW_SYS_FLAGSC_OFFSET 0x34
-	__raw_writel(3,
-		     __io_address(REALVIEW_SYS_BASE) +
-		     REALVIEW_SYS_FLAGSC_OFFSET);
-#endif
-
-	mb();
-}
-
-/*
- * Initialise the CPU possible map early - this describes the CPUs
- * which may be present or become present in the system.
- */
-void __init smp_init_cpus(void)
-{
-	unsigned int i, ncores = get_core_count();
-
 	for (i = 0; i < ncores; i++)
-		cpu_set(i, cpu_possible_map);
+		set_cpu_possible(i, true);
 }
 
-void __init smp_prepare_cpus(unsigned int max_cpus)
+static void __init realview_smp_prepare_cpus(unsigned int max_cpus)
 {
-	unsigned int ncores = get_core_count();
-	unsigned int cpu = smp_processor_id();
-	int i;
-
-	/* sanity check */
-	if (ncores == 0) {
-		printk(KERN_ERR
-		       "Realview: strange CM count of 0? Default to 1\n");
-
-		ncores = 1;
-	}
-
-	if (ncores > NR_CPUS) {
-		printk(KERN_WARNING
-		       "Realview: no. of cores (%d) greater than configured "
-		       "maximum of %d - clipping\n",
-		       ncores, NR_CPUS);
-		ncores = NR_CPUS;
-	}
 
-	smp_store_cpu_info(cpu);
+	scu_enable(scu_base_addr());
 
 	/*
-	 * are we trying to boot more cores than exist?
+	 * Write the address of secondary startup into the
+	 * system-wide flags register. The BootMonitor waits
+	 * until it receives a soft interrupt, and then the
+	 * secondary CPU branches to this address.
 	 */
-	if (max_cpus > ncores)
-		max_cpus = ncores;
+	__raw_writel(virt_to_phys(versatile_secondary_startup),
+		     __io_address(REALVIEW_SYS_FLAGSSET));
+}
 
-#if defined(CONFIG_LOCAL_TIMERS) || defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST)
-	/*
-	 * Enable the local timer or broadcast device for the boot CPU.
-	 */
-	local_timer_setup();
+struct smp_operations realview_smp_ops __initdata = {
+	.smp_init_cpus		= realview_smp_init_cpus,
+	.smp_prepare_cpus	= realview_smp_prepare_cpus,
+	.smp_secondary_init	= versatile_secondary_init,
+	.smp_boot_secondary	= versatile_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+	.cpu_die		= realview_cpu_die,
 #endif
-
-	/*
-	 * Initialise the present map, which describes the set of CPUs
-	 * actually populated at the present time.
-	 */
-	for (i = 0; i < max_cpus; i++)
-		cpu_set(i, cpu_present_map);
-
-	/*
-	 * Initialise the SCU if there are more than one CPU and let
-	 * them know where to start. Note that, on modern versions of
-	 * MILO, the "poke" doesn't actually do anything until each
-	 * individual core is sent a soft interrupt to get it out of
-	 * WFI
-	 */
-	if (max_cpus > 1) {
-		scu_enable();
-		poke_milo();
-	}
-}
+};