summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-shmobile/smp-emev2.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-shmobile/smp-emev2.c')
-rw-r--r--arch/arm/mach-shmobile/smp-emev2.c86
1 files changed, 13 insertions, 73 deletions
diff --git a/arch/arm/mach-shmobile/smp-emev2.c b/arch/arm/mach-shmobile/smp-emev2.c
index 953eb1f9388d..8225c16b371b 100644
--- a/arch/arm/mach-shmobile/smp-emev2.c
+++ b/arch/arm/mach-shmobile/smp-emev2.c
@@ -28,63 +28,9 @@
#include <mach/emev2.h>
#include <asm/smp_plat.h>
#include <asm/smp_scu.h>
-#include <asm/cacheflush.h>
#define EMEV2_SCU_BASE 0x1e000000
-static DEFINE_SPINLOCK(scu_lock);
-static void __iomem *scu_base;
-
-static void modify_scu_cpu_psr(unsigned long set, unsigned long clr)
-{
- unsigned long tmp;
-
- /* we assume this code is running on a different cpu
- * than the one that is changing coherency setting */
- spin_lock(&scu_lock);
- tmp = readl(scu_base + 8);
- tmp &= ~clr;
- tmp |= set;
- writel(tmp, scu_base + 8);
- spin_unlock(&scu_lock);
-
-}
-
-static unsigned int __init emev2_get_core_count(void)
-{
- if (!scu_base) {
- scu_base = ioremap(EMEV2_SCU_BASE, PAGE_SIZE);
- emev2_clock_init(); /* need ioremapped SMU */
- }
-
- WARN_ON_ONCE(!scu_base);
-
- return scu_base ? scu_get_core_count(scu_base) : 1;
-}
-
-static int emev2_platform_cpu_kill(unsigned int cpu)
-{
- return 0; /* not supported yet */
-}
-
-static int __maybe_unused emev2_cpu_kill(unsigned int cpu)
-{
- int k;
-
- /* this function is running on another CPU than the offline target,
- * here we need wait for shutdown code in platform_cpu_die() to
- * finish before asking SoC-specific code to power off the CPU core.
- */
- for (k = 0; k < 1000; k++) {
- if (shmobile_cpu_is_dead(cpu))
- return emev2_platform_cpu_kill(cpu);
- mdelay(1);
- }
-
- return 0;
-}
-
-
static void __cpuinit emev2_secondary_init(unsigned int cpu)
{
gic_secondary_init(0);
@@ -92,31 +38,30 @@ static void __cpuinit emev2_secondary_init(unsigned int cpu)
static int __cpuinit emev2_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
- cpu = cpu_logical_map(cpu);
-
- /* enable cache coherency */
- modify_scu_cpu_psr(0, 3 << (cpu * 8));
-
- /* Tell ROM loader about our vector (in headsmp.S) */
- emev2_set_boot_vector(__pa(shmobile_secondary_vector));
-
- arch_send_wakeup_ipi_mask(cpumask_of(cpu));
+ arch_send_wakeup_ipi_mask(cpumask_of(cpu_logical_map(cpu)));
return 0;
}
static void __init emev2_smp_prepare_cpus(unsigned int max_cpus)
{
- int cpu = cpu_logical_map(0);
+ scu_enable(shmobile_scu_base);
- scu_enable(scu_base);
+ /* Tell ROM loader about our vector (in headsmp-scu.S) */
+ emev2_set_boot_vector(__pa(shmobile_secondary_vector_scu));
- /* enable cache coherency on CPU0 */
- modify_scu_cpu_psr(0, 3 << (cpu * 8));
+ /* enable cache coherency on booting CPU */
+ scu_power_mode(shmobile_scu_base, SCU_PM_NORMAL);
}
static void __init emev2_smp_init_cpus(void)
{
- unsigned int ncores = emev2_get_core_count();
+ unsigned int ncores;
+
+ /* setup EMEV2 specific SCU base */
+ shmobile_scu_base = ioremap(EMEV2_SCU_BASE, PAGE_SIZE);
+ emev2_clock_init(); /* need ioremapped SMU */
+
+ ncores = shmobile_scu_base ? scu_get_core_count(shmobile_scu_base) : 1;
shmobile_smp_init_cpus(ncores);
}
@@ -126,9 +71,4 @@ struct smp_operations emev2_smp_ops __initdata = {
.smp_prepare_cpus = emev2_smp_prepare_cpus,
.smp_secondary_init = emev2_secondary_init,
.smp_boot_secondary = emev2_boot_secondary,
-#ifdef CONFIG_HOTPLUG_CPU
- .cpu_kill = emev2_cpu_kill,
- .cpu_die = shmobile_cpu_die,
- .cpu_disable = shmobile_cpu_disable,
-#endif
};
OpenPOWER on IntegriCloud