From 392e8802486cb573b916e746010e141a75f507e6 Mon Sep 17 00:00:00 2001
From: Kevin
Date: Sat, 15 Nov 2014 09:58:27 +0800
Subject: init android origin source code

---
 .../arch/powerpc/platforms/pseries/kexec.c         | 76 ++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 ANDROID_3.4.5/arch/powerpc/platforms/pseries/kexec.c

(limited to 'ANDROID_3.4.5/arch/powerpc/platforms/pseries/kexec.c')

diff --git a/ANDROID_3.4.5/arch/powerpc/platforms/pseries/kexec.c b/ANDROID_3.4.5/arch/powerpc/platforms/pseries/kexec.c
new file mode 100644
index 00000000..7d94bdc6
--- /dev/null
+++ b/ANDROID_3.4.5/arch/powerpc/platforms/pseries/kexec.c
@@ -0,0 +1,76 @@
+/*
+ *  Copyright 2006 Michael Ellerman, IBM Corporation
+ *
+ * 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; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+
+#include <asm/machdep.h>
+#include <asm/page.h>
+#include <asm/firmware.h>
+#include <asm/kexec.h>
+#include <asm/mpic.h>
+#include <asm/xics.h>
+#include <asm/smp.h>
+
+#include "pseries.h"
+#include "plpar_wrappers.h"
+
+static void pseries_kexec_cpu_down(int crash_shutdown, int secondary)
+{
+	/* Don't risk a hypervisor call if we're crashing */
+	if (firmware_has_feature(FW_FEATURE_SPLPAR) && !crash_shutdown) {
+		int ret;
+		int cpu = smp_processor_id();
+		int hwcpu = hard_smp_processor_id();
+
+		if (get_lppaca()->dtl_enable_mask) {
+			ret = unregister_dtl(hwcpu);
+			if (ret) {
+				pr_err("WARNING: DTL deregistration for cpu "
+				       "%d (hw %d) failed with %d\n",
+				       cpu, hwcpu, ret);
+			}
+		}
+
+		ret = unregister_slb_shadow(hwcpu);
+		if (ret) {
+			pr_err("WARNING: SLB shadow buffer deregistration "
+			       "for cpu %d (hw %d) failed with %d\n",
+			       cpu, hwcpu, ret);
+		}
+
+		ret = unregister_vpa(hwcpu);
+		if (ret) {
+			pr_err("WARNING: VPA deregistration for cpu %d "
+			       "(hw %d) failed with %d\n", cpu, hwcpu, ret);
+		}
+	}
+}
+
+static void pseries_kexec_cpu_down_mpic(int crash_shutdown, int secondary)
+{
+	pseries_kexec_cpu_down(crash_shutdown, secondary);
+	mpic_teardown_this_cpu(secondary);
+}
+
+void __init setup_kexec_cpu_down_mpic(void)
+{
+	ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_mpic;
+}
+
+static void pseries_kexec_cpu_down_xics(int crash_shutdown, int secondary)
+{
+	pseries_kexec_cpu_down(crash_shutdown, secondary);
+	xics_kexec_teardown_cpu(secondary);
+}
+
+void __init setup_kexec_cpu_down_xics(void)
+{
+	ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_xics;
+}
-- 
cgit