xref: /openbmc/linux/arch/s390/kernel/head64.S (revision 6f4eaea2)
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright IBM Corp. 1999, 2010
4 *
5 *   Author(s):	Hartmut Penner <hp@de.ibm.com>
6 *		Martin Schwidefsky <schwidefsky@de.ibm.com>
7 *		Rob van der Heij <rvdhei@iae.nl>
8 *		Heiko Carstens <heiko.carstens@de.ibm.com>
9 *
10 */
11
12#include <linux/init.h>
13#include <linux/linkage.h>
14#include <asm/asm-offsets.h>
15#include <asm/thread_info.h>
16#include <asm/page.h>
17#include <asm/ptrace.h>
18
19__HEAD
20ENTRY(startup_continue)
21	larl	%r1,tod_clock_base
22	mvc	0(16,%r1),__LC_BOOT_CLOCK
23	larl	%r13,.LPG1		# get base
24#
25# Setup stack
26#
27	larl	%r14,init_task
28	stg	%r14,__LC_CURRENT
29	larl	%r15,init_thread_union+THREAD_SIZE-STACK_FRAME_OVERHEAD-__PT_SIZE
30#ifdef CONFIG_KASAN
31	brasl	%r14,kasan_early_init
32#endif
33	brasl	%r14,startup_init		# s390 specific early init
34	brasl	%r14,start_kernel		# common init code
35#
36# We returned from start_kernel ?!? PANIK
37#
38	basr	%r13,0
39	lpswe	.Ldw-.(%r13)		# load disabled wait psw
40
41	.align	16
42.LPG1:
43.Ldw:	.quad	0x0002000180000000,0x0000000000000000
44