xref: /openbmc/linux/arch/s390/kernel/reipl.S (revision 26d14299)
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 *    Copyright IBM Corp 2000, 2011
4 *    Author(s): Holger Smolinski <Holger.Smolinski@de.ibm.com>,
5 *		 Denis Joseph Barrow,
6 */
7
8#include <linux/linkage.h>
9#include <asm/asm-offsets.h>
10#include <asm/nospec-insn.h>
11#include <asm/sigp.h>
12
13	GEN_BR_THUNK %r9
14
15#
16# Issue "store status" for the current CPU to its prefix page
17# and call passed function afterwards
18#
19# r2 = Function to be called after store status
20# r3 = Parameter for function
21#
22SYM_CODE_START(store_status)
23	/* Save register one and load save area base */
24	stg	%r1,__LC_SAVE_AREA_RESTART
25	/* General purpose registers */
26	lghi	%r1,__LC_GPREGS_SAVE_AREA
27	stmg	%r0,%r15,0(%r1)
28	mvc	8(8,%r1),__LC_SAVE_AREA_RESTART
29	/* Control registers */
30	lghi	%r1,__LC_CREGS_SAVE_AREA
31	stctg	%c0,%c15,0(%r1)
32	/* Access registers */
33	lghi	%r1,__LC_AREGS_SAVE_AREA
34	stam	%a0,%a15,0(%r1)
35	/* Floating point registers */
36	lghi	%r1,__LC_FPREGS_SAVE_AREA
37	std	%f0, 0x00(%r1)
38	std	%f1, 0x08(%r1)
39	std	%f2, 0x10(%r1)
40	std	%f3, 0x18(%r1)
41	std	%f4, 0x20(%r1)
42	std	%f5, 0x28(%r1)
43	std	%f6, 0x30(%r1)
44	std	%f7, 0x38(%r1)
45	std	%f8, 0x40(%r1)
46	std	%f9, 0x48(%r1)
47	std	%f10,0x50(%r1)
48	std	%f11,0x58(%r1)
49	std	%f12,0x60(%r1)
50	std	%f13,0x68(%r1)
51	std	%f14,0x70(%r1)
52	std	%f15,0x78(%r1)
53	/* Floating point control register */
54	lghi	%r1,__LC_FP_CREG_SAVE_AREA
55	stfpc	0(%r1)
56	/* CPU timer */
57	lghi	%r1,__LC_CPU_TIMER_SAVE_AREA
58	stpt	0(%r1)
59	/* Store prefix register */
60	lghi	%r1,__LC_PREFIX_SAVE_AREA
61	stpx	0(%r1)
62	/* Clock comparator - seven bytes */
63	lghi	%r1,__LC_CLOCK_COMP_SAVE_AREA
64	larl	%r4,clkcmp
65	stckc	0(%r4)
66	mvc	1(7,%r1),1(%r4)
67	/* Program status word */
68	lghi	%r1,__LC_PSW_SAVE_AREA
69	epsw	%r4,%r5
70	st	%r4,0(%r1)
71	st	%r5,4(%r1)
72	stg	%r2,8(%r1)
73	lgr	%r9,%r2
74	lgr	%r2,%r3
75	BR_EX	%r9
76SYM_CODE_END(store_status)
77
78	.section .bss
79	.balign	8
80SYM_DATA_LOCAL(clkcmp,	.quad 0x0000000000000000)
81	.previous
82