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review.evervolv.com / android_kernel_htc_msm8960 / 66846048f55c6c05a4c46c2daabb773173f8f28d / . / arch / s390 / kernel / base.S
blob: f8828d38fa6ec62d3ccd82f46c5228a21e519955 [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)
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]36 stmg %r0,%r15,__LC_SAVE_AREA
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
441: lmg %r0,%r15,__LC_SAVE_AREA
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)
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]56 stmg %r0,%r15,__LC_SAVE_AREA
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
64 lmg %r0,%r15,__LC_SAVE_AREA
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 Holzheu9dc73562011-08-03 16:44:22 +0200[diff] [blame]91 larl %r4,.Lrestart_psw # Setup restart PSW at absolute 0
92 lghi %r3,0
93 lg %r4,0(%r4) # Save PSW
94 sturg %r4,%r3 # Use sturg, because of large pages
95 lghi %r1,1
96 diag %r1,%r1,0x308
97.Lrestart_part2:
98 lhi %r0,0 # Load r0 with zero
99 lhi %r1,2 # Use mode 2 = ESAME (dump)
100 sigp %r1,%r0,0x12 # Switch to ESAME mode
101 sam64 # Switch to 64 bit addressing mode
102 larl %r4,.Lctlregs # Restore control registers
103 lctlg %c0,%c15,0(%r4)
Michael Holzheu60a0c682011-10-30 15:16:40 +0100[diff] [blame]104 larl %r4,.Lfpctl # Restore floating point ctl register
105 lfpc 0(%r4)
Michael Holzheu9dc73562011-08-03 16:44:22 +0200[diff] [blame]106 br %r14
107.align 16
108.Lrestart_psw:
109 .long 0x00080000,0x80000000 + .Lrestart_part2
110
111 .section .bss
112.align 8
113.Lctlregs:
114 .rept 16
115 .quad 0
116 .endr
Michael Holzheu60a0c682011-10-30 15:16:40 +0100[diff] [blame]117.Lfpctl:
118 .long 0
Michael Holzheu9dc73562011-08-03 16:44:22 +0200[diff] [blame]119 .previous
120
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]121#else /* CONFIG_64BIT */
122
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]123ENTRY(s390_base_mcck_handler)
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]124 basr %r13,0
1250: l %r15,__LC_PANIC_STACK # load panic stack
126 ahi %r15,-STACK_FRAME_OVERHEAD
127 l %r1,2f-0b(%r13)
128 l %r1,0(%r1)
129 ltr %r1,%r1
130 jz 1f
131 basr %r14,%r1
1321: lm %r0,%r15,__LC_GPREGS_SAVE_AREA
133 lpsw __LC_MCK_OLD_PSW
134
1352: .long s390_base_mcck_handler_fn
136
137 .section .bss
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]138 .align 4
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]139 .globl s390_base_mcck_handler_fn
140s390_base_mcck_handler_fn:
141 .long 0
142 .previous
143
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]144ENTRY(s390_base_ext_handler)
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]145 stm %r0,%r15,__LC_SAVE_AREA
146 basr %r13,0
1470: ahi %r15,-STACK_FRAME_OVERHEAD
148 l %r1,2f-0b(%r13)
149 l %r1,0(%r1)
150 ltr %r1,%r1
151 jz 1f
152 basr %r14,%r1
1531: lm %r0,%r15,__LC_SAVE_AREA
154 ni __LC_EXT_OLD_PSW+1,0xfd # clear wait state bit
155 lpsw __LC_EXT_OLD_PSW
156
1572: .long s390_base_ext_handler_fn
158
159 .section .bss
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]160 .align 4
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]161 .globl s390_base_ext_handler_fn
162s390_base_ext_handler_fn:
163 .long 0
164 .previous
165
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]166ENTRY(s390_base_pgm_handler)
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]167 stm %r0,%r15,__LC_SAVE_AREA
168 basr %r13,0
1690: ahi %r15,-STACK_FRAME_OVERHEAD
170 l %r1,2f-0b(%r13)
171 l %r1,0(%r1)
172 ltr %r1,%r1
173 jz 1f
174 basr %r14,%r1
175 lm %r0,%r15,__LC_SAVE_AREA
176 lpsw __LC_PGM_OLD_PSW
177
1781: lpsw disabled_wait_psw-0b(%r13)
179
1802: .long s390_base_pgm_handler_fn
181
182disabled_wait_psw:
183 .align 8
184 .long 0x000a0000,0x00000000 + s390_base_pgm_handler
185
186 .section .bss
Jan Glauber144d6342011-07-24 10:48:19 +0200[diff] [blame]187 .align 4
Heiko Carstensab14de62007-02-05 21:18:37 +0100[diff] [blame]188 .globl s390_base_pgm_handler_fn
189s390_base_pgm_handler_fn:
190 .long 0
191 .previous
192
193#endif /* CONFIG_64BIT */