aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-spear13xx/platsmp.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-spear13xx/platsmp.c')
-rw-r--r--arch/arm/mach-spear13xx/platsmp.c130
1 files changed, 0 insertions, 130 deletions
diff --git a/arch/arm/mach-spear13xx/platsmp.c b/arch/arm/mach-spear13xx/platsmp.c
deleted file mode 100644
index af4ade61cd9..00000000000
--- a/arch/arm/mach-spear13xx/platsmp.c
+++ /dev/null
@@ -1,130 +0,0 @@
-/*
- * arch/arm/mach-spear13xx/platsmp.c
- *
- * based upon linux/arch/arm/mach-realview/platsmp.c
- *
- * Copyright (C) 2012 ST Microelectronics Ltd.
- * Shiraz Hashim <shiraz.hashim@st.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/delay.h>
-#include <linux/jiffies.h>
-#include <linux/io.h>
-#include <linux/smp.h>
-#include <linux/irqchip/arm-gic.h>
-#include <asm/cacheflush.h>
-#include <asm/smp_scu.h>
-#include <mach/spear.h>
-#include <mach/generic.h>
-
-static DEFINE_SPINLOCK(boot_lock);
-
-static void __iomem *scu_base = IOMEM(VA_SCU_BASE);
-
-static void __cpuinit spear13xx_secondary_init(unsigned int cpu)
-{
- /*
- * 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_secondary_init(0);
-
- /*
- * 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);
-}
-
-static int __cpuinit spear13xx_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();
- outer_flush_all();
-
- timeout = jiffies + (1 * HZ);
- while (time_before(jiffies, timeout)) {
- smp_rmb();
- if (pen_release == -1)
- break;
-
- udelay(10);
- }
-
- /*
- * 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;
-}
-
-/*
- * Initialise the CPU possible map early - this describes the CPUs
- * which may be present or become present in the system.
- */
-static void __init spear13xx_smp_init_cpus(void)
-{
- unsigned int i, ncores = scu_get_core_count(scu_base);
-
- if (ncores > nr_cpu_ids) {
- pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
- ncores, nr_cpu_ids);
- ncores = nr_cpu_ids;
- }
-
- for (i = 0; i < ncores; i++)
- set_cpu_possible(i, true);
-}
-
-static void __init spear13xx_smp_prepare_cpus(unsigned int max_cpus)
-{
-
- scu_enable(scu_base);
-
- /*
- * Write the address of secondary startup into the system-wide location
- * (presently it is in SRAM). The BootMonitor waits until it receives a
- * soft interrupt, and then the secondary CPU branches to this address.
- */
- __raw_writel(virt_to_phys(spear13xx_secondary_startup), SYS_LOCATION);
-}
-
-struct smp_operations spear13xx_smp_ops __initdata = {
- .smp_init_cpus = spear13xx_smp_init_cpus,
- .smp_prepare_cpus = spear13xx_smp_prepare_cpus,
- .smp_secondary_init = spear13xx_secondary_init,
- .smp_boot_secondary = spear13xx_boot_secondary,
-#ifdef CONFIG_HOTPLUG_CPU
- .cpu_die = spear13xx_cpu_die,
-#endif
-};