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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/powerpc/platforms/ps3/smp.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/powerpc/platforms/ps3/smp.c')
-rw-r--r--kernel/arch/powerpc/platforms/ps3/smp.c132
1 files changed, 132 insertions, 0 deletions
diff --git a/kernel/arch/powerpc/platforms/ps3/smp.c b/kernel/arch/powerpc/platforms/ps3/smp.c
new file mode 100644
index 000000000..3c7707af3
--- /dev/null
+++ b/kernel/arch/powerpc/platforms/ps3/smp.c
@@ -0,0 +1,132 @@
+/*
+ * PS3 SMP routines.
+ *
+ * Copyright (C) 2006 Sony Computer Entertainment Inc.
+ * Copyright 2006 Sony Corp.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/smp.h>
+
+#include <asm/machdep.h>
+#include <asm/udbg.h>
+
+#include "platform.h"
+
+#if defined(DEBUG)
+#define DBG udbg_printf
+#else
+#define DBG pr_debug
+#endif
+
+/**
+ * ps3_ipi_virqs - a per cpu array of virqs for ipi use
+ */
+
+#define MSG_COUNT 4
+static DEFINE_PER_CPU(unsigned int [MSG_COUNT], ps3_ipi_virqs);
+
+static void ps3_smp_message_pass(int cpu, int msg)
+{
+ int result;
+ unsigned int virq;
+
+ if (msg >= MSG_COUNT) {
+ DBG("%s:%d: bad msg: %d\n", __func__, __LINE__, msg);
+ return;
+ }
+
+ virq = per_cpu(ps3_ipi_virqs, cpu)[msg];
+ result = ps3_send_event_locally(virq);
+
+ if (result)
+ DBG("%s:%d: ps3_send_event_locally(%d, %d) failed"
+ " (%d)\n", __func__, __LINE__, cpu, msg, result);
+}
+
+static void __init ps3_smp_probe(void)
+{
+ int cpu;
+
+ for (cpu = 0; cpu < 2; cpu++) {
+ int result;
+ unsigned int *virqs = per_cpu(ps3_ipi_virqs, cpu);
+ int i;
+
+ DBG(" -> %s:%d: (%d)\n", __func__, __LINE__, cpu);
+
+ /*
+ * Check assumptions on ps3_ipi_virqs[] indexing. If this
+ * check fails, then a different mapping of PPC_MSG_
+ * to index needs to be setup.
+ */
+
+ BUILD_BUG_ON(PPC_MSG_CALL_FUNCTION != 0);
+ BUILD_BUG_ON(PPC_MSG_RESCHEDULE != 1);
+ BUILD_BUG_ON(PPC_MSG_TICK_BROADCAST != 2);
+ BUILD_BUG_ON(PPC_MSG_DEBUGGER_BREAK != 3);
+
+ for (i = 0; i < MSG_COUNT; i++) {
+ result = ps3_event_receive_port_setup(cpu, &virqs[i]);
+
+ if (result)
+ continue;
+
+ DBG("%s:%d: (%d, %d) => virq %u\n",
+ __func__, __LINE__, cpu, i, virqs[i]);
+
+ result = smp_request_message_ipi(virqs[i], i);
+
+ if (result)
+ virqs[i] = NO_IRQ;
+ else
+ ps3_register_ipi_irq(cpu, virqs[i]);
+ }
+
+ ps3_register_ipi_debug_brk(cpu, virqs[PPC_MSG_DEBUGGER_BREAK]);
+
+ DBG(" <- %s:%d: (%d)\n", __func__, __LINE__, cpu);
+ }
+}
+
+void ps3_smp_cleanup_cpu(int cpu)
+{
+ unsigned int *virqs = per_cpu(ps3_ipi_virqs, cpu);
+ int i;
+
+ DBG(" -> %s:%d: (%d)\n", __func__, __LINE__, cpu);
+
+ for (i = 0; i < MSG_COUNT; i++) {
+ /* Can't call free_irq from interrupt context. */
+ ps3_event_receive_port_destroy(virqs[i]);
+ virqs[i] = NO_IRQ;
+ }
+
+ DBG(" <- %s:%d: (%d)\n", __func__, __LINE__, cpu);
+}
+
+static struct smp_ops_t ps3_smp_ops = {
+ .probe = ps3_smp_probe,
+ .message_pass = ps3_smp_message_pass,
+ .kick_cpu = smp_generic_kick_cpu,
+};
+
+void smp_init_ps3(void)
+{
+ DBG(" -> %s\n", __func__);
+ smp_ops = &ps3_smp_ops;
+ DBG(" <- %s\n", __func__);
+}