xref: /linux/arch/s390/kernel/head64.S (revision 4ae68b26c3ab5a82aa271e6e9fc9b1a06e1d6b40)
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 *
9 */
10
11#include <linux/init.h>
12#include <linux/linkage.h>
13#include <asm/asm-offsets.h>
14#include <asm/thread_info.h>
15#include <asm/page.h>
16#include <asm/ptrace.h>
17
18__HEAD
19SYM_CODE_START(startup_continue)
20	larl	%r1,tod_clock_base
21	mvc	0(16,%r1),__LC_BOOT_CLOCK
22#
23# Setup stack
24#
25	larl	%r14,init_task
26	stg	%r14,__LC_CURRENT
27	larl	%r15,init_thread_union+STACK_INIT_OFFSET
28	stg	%r15,__LC_KERNEL_STACK
29	brasl	%r14,sclp_early_adjust_va	# allow sclp_early_printk
30	brasl	%r14,startup_init		# s390 specific early init
31	brasl	%r14,start_kernel		# common init code
32#
33# We returned from start_kernel ?!? PANIK
34#
35	basr	%r13,0
36	lpswe	dw_psw-.(%r13)		# load disabled wait psw
37SYM_CODE_END(startup_continue)
38
39	.balign	16
40SYM_DATA_LOCAL(dw_psw,	.quad 0x0002000180000000,0x0000000000000000)
41