sparc32: refactor smp boot
Introduce a common smp_callin() function to call
from trampoline_32.S.
Add platform specific functions to handle the
platform details.
This is in preparation for a patch that will
unify the smp boot stuff for all architectures.
sparc32 was significantly different to warrant
this patch in preparation.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/kernel/smp_32.c b/arch/sparc/kernel/smp_32.c
index 79db45e..9e7e6d7 100644
--- a/arch/sparc/kernel/smp_32.c
+++ b/arch/sparc/kernel/smp_32.c
@@ -20,6 +20,7 @@
#include <linux/seq_file.h>
#include <linux/cache.h>
#include <linux/delay.h>
+#include <linux/cpu.h>
#include <asm/ptrace.h>
#include <linux/atomic.h>
@@ -32,8 +33,10 @@
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
#include <asm/cpudata.h>
+#include <asm/timer.h>
#include <asm/leon.h>
+#include "kernel.h"
#include "irq.h"
volatile unsigned long cpu_callin_map[NR_CPUS] __cpuinitdata = {0,};
@@ -294,6 +297,89 @@
return ret;
}
+void __cpuinit arch_cpu_pre_starting(void *arg)
+{
+ local_ops->cache_all();
+ local_ops->tlb_all();
+
+ switch(sparc_cpu_model) {
+ case sun4m:
+ sun4m_cpu_pre_starting(arg);
+ break;
+ case sun4d:
+ sun4d_cpu_pre_starting(arg);
+ break;
+ case sparc_leon:
+ leon_cpu_pre_starting(arg);
+ break;
+ default:
+ BUG();
+ }
+}
+
+void __cpuinit arch_cpu_pre_online(void *arg)
+{
+ unsigned int cpuid = hard_smp_processor_id();
+
+ register_percpu_ce(cpuid);
+
+ calibrate_delay();
+ smp_store_cpu_info(cpuid);
+
+ local_ops->cache_all();
+ local_ops->tlb_all();
+
+ switch(sparc_cpu_model) {
+ case sun4m:
+ sun4m_cpu_pre_online(arg);
+ break;
+ case sun4d:
+ sun4d_cpu_pre_online(arg);
+ break;
+ case sparc_leon:
+ leon_cpu_pre_online(arg);
+ break;
+ default:
+ BUG();
+ }
+}
+
+void __cpuinit sparc_start_secondary(void *arg)
+{
+ unsigned int cpu;
+
+ /*
+ * SMP booting is extremely fragile in some architectures. So run
+ * the cpu initialization code first before anything else.
+ */
+ arch_cpu_pre_starting(arg);
+
+ preempt_disable();
+ cpu = smp_processor_id();
+
+ /* Invoke the CPU_STARTING notifier callbacks */
+ notify_cpu_starting(cpu);
+
+ arch_cpu_pre_online(arg);
+
+ /* Set the CPU in the cpu_online_mask */
+ set_cpu_online(cpu, true);
+
+ /* Enable local interrupts now */
+ local_irq_enable();
+
+ wmb();
+ cpu_idle();
+
+ /* We should never reach here! */
+ BUG();
+}
+
+void __cpuinit smp_callin(void)
+{
+ sparc_start_secondary(NULL);
+}
+
void smp_bogo(struct seq_file *m)
{
int i;