From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 27 Apr 2024 12:05:51 +0200
Subject: Adding upstream version 5.10.209.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 arch/s390/kernel/head64.S | 48 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 arch/s390/kernel/head64.S

(limited to 'arch/s390/kernel/head64.S')

diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
new file mode 100644
index 000000000..8b88dbbda
--- /dev/null
+++ b/arch/s390/kernel/head64.S
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright IBM Corp. 1999, 2010
+ *
+ *   Author(s):	Hartmut Penner <hp@de.ibm.com>
+ *		Martin Schwidefsky <schwidefsky@de.ibm.com>
+ *		Rob van der Heij <rvdhei@iae.nl>
+ *		Heiko Carstens <heiko.carstens@de.ibm.com>
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <asm/asm-offsets.h>
+#include <asm/thread_info.h>
+#include <asm/page.h>
+#include <asm/ptrace.h>
+
+__HEAD
+ENTRY(startup_continue)
+	tm	__LC_STFLE_FAC_LIST+5,0x80	# LPP available ?
+	jz	0f
+	xc	__LC_LPP+1(7,0),__LC_LPP+1	# clear lpp and current_pid
+	mvi	__LC_LPP,0x80			#   and set LPP_MAGIC
+	.insn	s,0xb2800000,__LC_LPP		# load program parameter
+0:	larl	%r1,tod_clock_base
+	mvc	0(16,%r1),__LC_BOOT_CLOCK
+	larl	%r13,.LPG1		# get base
+#
+# Setup stack
+#
+	larl	%r14,init_task
+	stg	%r14,__LC_CURRENT
+	larl	%r15,init_thread_union+THREAD_SIZE-STACK_FRAME_OVERHEAD-__PT_SIZE
+#ifdef CONFIG_KASAN
+	brasl	%r14,kasan_early_init
+#endif
+	brasl	%r14,startup_init		# s390 specific early init
+	brasl	%r14,start_kernel		# common init code
+#
+# We returned from start_kernel ?!? PANIK
+#
+	basr	%r13,0
+	lpswe	.Ldw-.(%r13)		# load disabled wait psw
+
+	.align	16
+.LPG1:
+.Ldw:	.quad	0x0002000180000000,0x0000000000000000
-- 
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