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review.evervolv.com / android_kernel_oneplus_msm8996 / fa7c0043425624ed65b94a6fabe750c7b0af8719 / . / arch / s390 / kernel / base.S
blob: c880ff72db44a0247f57c48450a230f682843ec1 [file] [log] [blame]
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]1/*
2 * arch/s390/kernel/base.S
3 *
4 * Copyright IBM Corp. 2006,2007
5 * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
6 * Michael Holzheu <holzheu@de.ibm.com>
7 */
8
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]9#include <linux/linkage.h>
Heiko Carstenscbb870c2010-02-26 22:37:43 +0100[diff] [blame]10#include <asm/asm-offsets.h>
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]11#include <asm/ptrace.h>
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]12
13#ifdef CONFIG_64BIT
14
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]15ENTRY(s390_base_mcck_handler)
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]16 basr %r13,0
170: lg %r15,__LC_PANIC_STACK # load panic stack
18 aghi %r15,-STACK_FRAME_OVERHEAD
19 larl %r1,s390_base_mcck_handler_fn
20 lg %r1,0(%r1)
21 ltgr %r1,%r1
22 jz 1f
23 basr %r14,%r1
241: la %r1,4095
25 lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)
26 lpswe __LC_MCK_OLD_PSW
27
28 .section .bss
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]29 .align 8
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]30 .globl s390_base_mcck_handler_fn
31s390_base_mcck_handler_fn:
32 .quad 0
33 .previous
34
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]35ENTRY(s390_base_ext_handler)
Martin Schwidefskyc5328902011-12-27 11:27:15 +0100[diff] [blame]36 stmg %r0,%r15,__LC_SAVE_AREA_ASYNC
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]37 basr %r13,0
380: aghi %r15,-STACK_FRAME_OVERHEAD
39 larl %r1,s390_base_ext_handler_fn
40 lg %r1,0(%r1)
41 ltgr %r1,%r1
42 jz 1f
43 basr %r14,%r1
Martin Schwidefskyc5328902011-12-27 11:27:15 +0100[diff] [blame]441: lmg %r0,%r15,__LC_SAVE_AREA_ASYNC
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]45 ni __LC_EXT_OLD_PSW+1,0xfd # clear wait state bit
46 lpswe __LC_EXT_OLD_PSW
47
48 .section .bss
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]49 .align 8
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]50 .globl s390_base_ext_handler_fn
51s390_base_ext_handler_fn:
52 .quad 0
53 .previous
54
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]55ENTRY(s390_base_pgm_handler)
Martin Schwidefskyc5328902011-12-27 11:27:15 +0100[diff] [blame]56 stmg %r0,%r15,__LC_SAVE_AREA_SYNC
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]57 basr %r13,0
580: aghi %r15,-STACK_FRAME_OVERHEAD
59 larl %r1,s390_base_pgm_handler_fn
60 lg %r1,0(%r1)
61 ltgr %r1,%r1
62 jz 1f
63 basr %r14,%r1
Martin Schwidefskyc5328902011-12-27 11:27:15 +0100[diff] [blame]64 lmg %r0,%r15,__LC_SAVE_AREA_SYNC
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]65 lpswe __LC_PGM_OLD_PSW
661: lpswe disabled_wait_psw-0b(%r13)
67
68 .align 8
69disabled_wait_psw:
70 .quad 0x0002000180000000,0x0000000000000000 + s390_base_pgm_handler
71
72 .section .bss
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]73 .align 8
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]74 .globl s390_base_pgm_handler_fn
75s390_base_pgm_handler_fn:
76 .quad 0
77 .previous
78
Michael Holzheu9dc73562011-08-03 16:44:22 +0200[diff] [blame]79#
80# Calls diag 308 subcode 1 and continues execution
81#
82# The following conditions must be ensured before calling this function:
83# * Prefix register = 0
84# * Lowcore protection is disabled
85#
86ENTRY(diag308_reset)
87 larl %r4,.Lctlregs # Save control registers
88 stctg %c0,%c15,0(%r4)
Michael Holzheu60a0c682011-10-30 15:16:40 +0100[diff] [blame]89 larl %r4,.Lfpctl # Floating point control register
90 stfpc 0(%r4)
Michael Holzheufa7c0042012-05-21 11:30:30 +0200[diff] [blame^]91 larl %r4,.Lcontinue_psw # Save PSW flags
92 epsw %r2,%r3
93 stm %r2,%r3,0(%r4)
Michael Holzheu9dc73562011-08-03 16:44:22 +0200[diff] [blame]94 larl %r4,.Lrestart_psw # Setup restart PSW at absolute 0
95 lghi %r3,0
96 lg %r4,0(%r4) # Save PSW
97 sturg %r4,%r3 # Use sturg, because of large pages
98 lghi %r1,1
99 diag %r1,%r1,0x308
100.Lrestart_part2:
101 lhi %r0,0 # Load r0 with zero
102 lhi %r1,2 # Use mode 2 = ESAME (dump)
103 sigp %r1,%r0,0x12 # Switch to ESAME mode
104 sam64 # Switch to 64 bit addressing mode
105 larl %r4,.Lctlregs # Restore control registers
106 lctlg %c0,%c15,0(%r4)
Michael Holzheu60a0c682011-10-30 15:16:40 +0100[diff] [blame]107 larl %r4,.Lfpctl # Restore floating point ctl register
108 lfpc 0(%r4)
Michael Holzheufa7c0042012-05-21 11:30:30 +0200[diff] [blame^]109 larl %r4,.Lcontinue_psw # Restore PSW flags
110 lpswe 0(%r4)
111.Lcontinue:
Michael Holzheu9dc73562011-08-03 16:44:22 +0200[diff] [blame]112 br %r14
113.align 16
114.Lrestart_psw:
115 .long 0x00080000,0x80000000 + .Lrestart_part2
116
Michael Holzheufa7c0042012-05-21 11:30:30 +0200[diff] [blame^]117 .section .data..nosave,"aw",@progbits
118.align 8
119.Lcontinue_psw:
120 .quad 0,.Lcontinue
121 .previous
122
Michael Holzheu9dc73562011-08-03 16:44:22 +0200[diff] [blame]123 .section .bss
124.align 8
125.Lctlregs:
126 .rept 16
127 .quad 0
128 .endr
Michael Holzheu60a0c682011-10-30 15:16:40 +0100[diff] [blame]129.Lfpctl:
130 .long 0
Michael Holzheu9dc73562011-08-03 16:44:22 +0200[diff] [blame]131 .previous
132
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]133#else /* CONFIG_64BIT */
134
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]135ENTRY(s390_base_mcck_handler)
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]136 basr %r13,0
1370: l %r15,__LC_PANIC_STACK # load panic stack
138 ahi %r15,-STACK_FRAME_OVERHEAD
139 l %r1,2f-0b(%r13)
140 l %r1,0(%r1)
141 ltr %r1,%r1
142 jz 1f
143 basr %r14,%r1
1441: lm %r0,%r15,__LC_GPREGS_SAVE_AREA
145 lpsw __LC_MCK_OLD_PSW
146
1472: .long s390_base_mcck_handler_fn
148
149 .section .bss
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]150 .align 4
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]151 .globl s390_base_mcck_handler_fn
152s390_base_mcck_handler_fn:
153 .long 0
154 .previous
155
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]156ENTRY(s390_base_ext_handler)
Martin Schwidefskyc5328902011-12-27 11:27:15 +0100[diff] [blame]157 stm %r0,%r15,__LC_SAVE_AREA_ASYNC
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]158 basr %r13,0
1590: ahi %r15,-STACK_FRAME_OVERHEAD
160 l %r1,2f-0b(%r13)
161 l %r1,0(%r1)
162 ltr %r1,%r1
163 jz 1f
164 basr %r14,%r1
Martin Schwidefskyc5328902011-12-27 11:27:15 +0100[diff] [blame]1651: lm %r0,%r15,__LC_SAVE_AREA_ASYNC
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]166 ni __LC_EXT_OLD_PSW+1,0xfd # clear wait state bit
167 lpsw __LC_EXT_OLD_PSW
168
1692: .long s390_base_ext_handler_fn
170
171 .section .bss
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]172 .align 4
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]173 .globl s390_base_ext_handler_fn
174s390_base_ext_handler_fn:
175 .long 0
176 .previous
177
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]178ENTRY(s390_base_pgm_handler)
Martin Schwidefskyc5328902011-12-27 11:27:15 +0100[diff] [blame]179 stm %r0,%r15,__LC_SAVE_AREA_SYNC
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]180 basr %r13,0
1810: ahi %r15,-STACK_FRAME_OVERHEAD
182 l %r1,2f-0b(%r13)
183 l %r1,0(%r1)
184 ltr %r1,%r1
185 jz 1f
186 basr %r14,%r1
Martin Schwidefskyc5328902011-12-27 11:27:15 +0100[diff] [blame]187 lm %r0,%r15,__LC_SAVE_AREA_SYNC
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]188 lpsw __LC_PGM_OLD_PSW
189
1901: lpsw disabled_wait_psw-0b(%r13)
191
1922: .long s390_base_pgm_handler_fn
193
194disabled_wait_psw:
195 .align 8
196 .long 0x000a0000,0x00000000 + s390_base_pgm_handler
197
198 .section .bss
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]199 .align 4
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]200 .globl s390_base_pgm_handler_fn
201s390_base_pgm_handler_fn:
202 .long 0
203 .previous
204
205#endif /* CONFIG_64BIT */