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Diffstat (limited to 'arch/ppc64/kernel/pSeries_smp.c')
-rw-r--r--arch/ppc64/kernel/pSeries_smp.c83
1 files changed, 73 insertions, 10 deletions
diff --git a/arch/ppc64/kernel/pSeries_smp.c b/arch/ppc64/kernel/pSeries_smp.c
index fbad349ec58c..62c55a123560 100644
--- a/arch/ppc64/kernel/pSeries_smp.c
+++ b/arch/ppc64/kernel/pSeries_smp.c
@@ -1,5 +1,5 @@
/*
- * SMP support for pSeries machines.
+ * SMP support for pSeries and BPA machines.
*
* Dave Engebretsen, Peter Bergner, and
* Mike Corrigan {engebret|bergner|mikec}@us.ibm.com
@@ -47,6 +47,7 @@
#include <asm/pSeries_reconfig.h>
#include "mpic.h"
+#include "bpa_iic.h"
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
@@ -92,10 +93,13 @@ static int query_cpu_stopped(unsigned int pcpu)
int pSeries_cpu_disable(void)
{
+ int cpu = smp_processor_id();
+
+ cpu_clear(cpu, cpu_online_map);
systemcfg->processorCount--;
/*fix boot_cpuid here*/
- if (smp_processor_id() == boot_cpuid)
+ if (cpu == boot_cpuid)
boot_cpuid = any_online_cpu(cpu_online_map);
/* FIXME: abstract this to not be platform specific later on */
@@ -286,6 +290,7 @@ static inline int __devinit smp_startup_cpu(unsigned int lcpu)
return 1;
}
+#ifdef CONFIG_XICS
static inline void smp_xics_do_message(int cpu, int msg)
{
set_bit(msg, &xics_ipi_message[cpu].value);
@@ -327,6 +332,37 @@ static void __devinit smp_xics_setup_cpu(int cpu)
cpu_clear(cpu, of_spin_map);
}
+#endif /* CONFIG_XICS */
+#ifdef CONFIG_BPA_IIC
+static void smp_iic_message_pass(int target, int msg)
+{
+ unsigned int i;
+
+ if (target < NR_CPUS) {
+ iic_cause_IPI(target, msg);
+ } else {
+ for_each_online_cpu(i) {
+ if (target == MSG_ALL_BUT_SELF
+ && i == smp_processor_id())
+ continue;
+ iic_cause_IPI(i, msg);
+ }
+ }
+}
+
+static int __init smp_iic_probe(void)
+{
+ iic_request_IPIs();
+
+ return cpus_weight(cpu_possible_map);
+}
+
+static void __devinit smp_iic_setup_cpu(int cpu)
+{
+ if (cpu != boot_cpuid)
+ iic_setup_cpu();
+}
+#endif /* CONFIG_BPA_IIC */
static DEFINE_SPINLOCK(timebase_lock);
static unsigned long timebase = 0;
@@ -375,20 +411,21 @@ static int smp_pSeries_cpu_bootable(unsigned int nr)
* cpus are assumed to be secondary threads.
*/
if (system_state < SYSTEM_RUNNING &&
- cur_cpu_spec->cpu_features & CPU_FTR_SMT &&
+ cpu_has_feature(CPU_FTR_SMT) &&
!smt_enabled_at_boot && nr % 2 != 0)
return 0;
return 1;
}
-
+#ifdef CONFIG_MPIC
static struct smp_ops_t pSeries_mpic_smp_ops = {
.message_pass = smp_mpic_message_pass,
.probe = smp_mpic_probe,
.kick_cpu = smp_pSeries_kick_cpu,
.setup_cpu = smp_mpic_setup_cpu,
};
-
+#endif
+#ifdef CONFIG_XICS
static struct smp_ops_t pSeries_xics_smp_ops = {
.message_pass = smp_xics_message_pass,
.probe = smp_xics_probe,
@@ -396,6 +433,16 @@ static struct smp_ops_t pSeries_xics_smp_ops = {
.setup_cpu = smp_xics_setup_cpu,
.cpu_bootable = smp_pSeries_cpu_bootable,
};
+#endif
+#ifdef CONFIG_BPA_IIC
+static struct smp_ops_t bpa_iic_smp_ops = {
+ .message_pass = smp_iic_message_pass,
+ .probe = smp_iic_probe,
+ .kick_cpu = smp_pSeries_kick_cpu,
+ .setup_cpu = smp_iic_setup_cpu,
+ .cpu_bootable = smp_pSeries_cpu_bootable,
+};
+#endif
/* This is called very early */
void __init smp_init_pSeries(void)
@@ -404,10 +451,25 @@ void __init smp_init_pSeries(void)
DBG(" -> smp_init_pSeries()\n");
- if (ppc64_interrupt_controller == IC_OPEN_PIC)
+ switch (ppc64_interrupt_controller) {
+#ifdef CONFIG_MPIC
+ case IC_OPEN_PIC:
smp_ops = &pSeries_mpic_smp_ops;
- else
+ break;
+#endif
+#ifdef CONFIG_XICS
+ case IC_PPC_XIC:
smp_ops = &pSeries_xics_smp_ops;
+ break;
+#endif
+#ifdef CONFIG_BPA_IIC
+ case IC_BPA_IIC:
+ smp_ops = &bpa_iic_smp_ops;
+ break;
+#endif
+ default:
+ panic("Invalid interrupt controller");
+ }
#ifdef CONFIG_HOTPLUG_CPU
smp_ops->cpu_disable = pSeries_cpu_disable;
@@ -419,8 +481,8 @@ void __init smp_init_pSeries(void)
#endif
/* Mark threads which are still spinning in hold loops. */
- if (cur_cpu_spec->cpu_features & CPU_FTR_SMT)
- for_each_present_cpu(i) {
+ if (cpu_has_feature(CPU_FTR_SMT)) {
+ for_each_present_cpu(i) {
if (i % 2 == 0)
/*
* Even-numbered logical cpus correspond to
@@ -428,8 +490,9 @@ void __init smp_init_pSeries(void)
*/
cpu_set(i, of_spin_map);
}
- else
+ } else {
of_spin_map = cpu_present_map;
+ }
cpu_clear(boot_cpuid, of_spin_map);