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Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 | 2 | /* |
a53c8fab | 3 | * Copyright IBM Corp 2000, 2011 |
c70d0fef HC |
4 | * Author(s): Holger Smolinski <Holger.Smolinski@de.ibm.com>, |
5 | * Denis Joseph Barrow, | |
1da177e4 LT |
6 | */ |
7 | ||
144d634a | 8 | #include <linux/linkage.h> |
cbb870c8 | 9 | #include <asm/asm-offsets.h> |
eb546195 | 10 | #include <asm/sigp.h> |
c5dd8586 | 11 | |
ef1daec8 | 12 | # |
1a36a39e MS |
13 | # Issue "store status" for the current CPU to its prefix page |
14 | # and call passed function afterwards | |
ef1daec8 | 15 | # |
1a36a39e MS |
16 | # r2 = Function to be called after store status |
17 | # r3 = Parameter for function | |
ef1daec8 MH |
18 | # |
19 | ENTRY(store_status) | |
20 | /* Save register one and load save area base */ | |
c5328901 | 21 | stg %r1,__LC_SAVE_AREA_RESTART |
ef1daec8 | 22 | /* General purpose registers */ |
f08b8414 MS |
23 | lghi %r1,__LC_GPREGS_SAVE_AREA |
24 | stmg %r0,%r15,0(%r1) | |
25 | mvc 8(8,%r1),__LC_SAVE_AREA_RESTART | |
ef1daec8 | 26 | /* Control registers */ |
f08b8414 MS |
27 | lghi %r1,__LC_CREGS_SAVE_AREA |
28 | stctg %c0,%c15,0(%r1) | |
ef1daec8 | 29 | /* Access registers */ |
f08b8414 MS |
30 | lghi %r1,__LC_AREGS_SAVE_AREA |
31 | stam %a0,%a15,0(%r1) | |
ef1daec8 | 32 | /* Floating point registers */ |
f08b8414 MS |
33 | lghi %r1,__LC_FPREGS_SAVE_AREA |
34 | std %f0, 0x00(%r1) | |
35 | std %f1, 0x08(%r1) | |
36 | std %f2, 0x10(%r1) | |
37 | std %f3, 0x18(%r1) | |
38 | std %f4, 0x20(%r1) | |
39 | std %f5, 0x28(%r1) | |
40 | std %f6, 0x30(%r1) | |
41 | std %f7, 0x38(%r1) | |
42 | std %f8, 0x40(%r1) | |
43 | std %f9, 0x48(%r1) | |
44 | std %f10,0x50(%r1) | |
45 | std %f11,0x58(%r1) | |
46 | std %f12,0x60(%r1) | |
47 | std %f13,0x68(%r1) | |
48 | std %f14,0x70(%r1) | |
49 | std %f15,0x78(%r1) | |
ef1daec8 | 50 | /* Floating point control register */ |
f08b8414 MS |
51 | lghi %r1,__LC_FP_CREG_SAVE_AREA |
52 | stfpc 0(%r1) | |
ef1daec8 | 53 | /* CPU timer */ |
f08b8414 MS |
54 | lghi %r1,__LC_CPU_TIMER_SAVE_AREA |
55 | stpt 0(%r1) | |
1a36a39e | 56 | /* Store prefix register */ |
f08b8414 | 57 | lghi %r1,__LC_PREFIX_SAVE_AREA |
1a36a39e | 58 | stpx 0(%r1) |
ef1daec8 | 59 | /* Clock comparator - seven bytes */ |
f08b8414 | 60 | lghi %r1,__LC_CLOCK_COMP_SAVE_AREA |
1a36a39e MS |
61 | larl %r4,.Lclkcmp |
62 | stckc 0(%r4) | |
63 | mvc 1(7,%r1),1(%r4) | |
ef1daec8 | 64 | /* Program status word */ |
f08b8414 | 65 | lghi %r1,__LC_PSW_SAVE_AREA |
1a36a39e MS |
66 | epsw %r4,%r5 |
67 | st %r4,0(%r1) | |
68 | st %r5,4(%r1) | |
f08b8414 | 69 | stg %r2,8(%r1) |
1a36a39e MS |
70 | lgr %r1,%r2 |
71 | lgr %r2,%r3 | |
72 | br %r1 | |
60a0c68d MH |
73 | |
74 | .section .bss | |
75 | .align 8 | |
ef1daec8 | 76 | .Lclkcmp: .quad 0x0000000000000000 |
60a0c68d | 77 | .previous |
ef1daec8 | 78 | |
c5dd8586 HC |
79 | # |
80 | # do_reipl_asm | |
81 | # Parameter: r2 = schid of reipl device | |
82 | # | |
83 | ||
144d634a JG |
84 | ENTRY(do_reipl_asm) |
85 | basr %r13,0 | |
15e9b586 | 86 | .Lpg0: lpswe .Lnewpsw-.Lpg0(%r13) |
1a36a39e MS |
87 | .Lpg1: lgr %r3,%r2 |
88 | larl %r2,.Lstatus | |
89 | brasl %r14,store_status | |
ff6b8ea6 | 90 | |
1a36a39e | 91 | .Lstatus: lctlg %c6,%c6,.Lall-.Lpg0(%r13) |
25d83cbf HC |
92 | lgr %r1,%r2 |
93 | mvc __LC_PGM_NEW_PSW(16),.Lpcnew-.Lpg0(%r13) | |
94 | stsch .Lschib-.Lpg0(%r13) | |
95 | oi .Lschib+5-.Lpg0(%r13),0x84 | |
4bfc86ce | 96 | .Lecs: xi .Lschib+27-.Lpg0(%r13),0x01 |
25d83cbf HC |
97 | msch .Lschib-.Lpg0(%r13) |
98 | lghi %r0,5 | |
99 | .Lssch: ssch .Liplorb-.Lpg0(%r13) | |
1da177e4 | 100 | jz .L001 |
25d83cbf | 101 | brct %r0,.Lssch |
1da177e4 | 102 | bas %r14,.Ldisab-.Lpg0(%r13) |
25d83cbf HC |
103 | .L001: mvc __LC_IO_NEW_PSW(16),.Lionew-.Lpg0(%r13) |
104 | .Ltpi: lpswe .Lwaitpsw-.Lpg0(%r13) | |
1da177e4 LT |
105 | .Lcont: c %r1,__LC_SUBCHANNEL_ID |
106 | jnz .Ltpi | |
107 | clc __LC_IO_INT_PARM(4),.Liplorb-.Lpg0(%r13) | |
108 | jnz .Ltpi | |
25d83cbf | 109 | tsch .Liplirb-.Lpg0(%r13) |
1da177e4 | 110 | tm .Liplirb+9-.Lpg0(%r13),0xbf |
25d83cbf HC |
111 | jz .L002 |
112 | bas %r14,.Ldisab-.Lpg0(%r13) | |
113 | .L002: tm .Liplirb+8-.Lpg0(%r13),0xf3 | |
114 | jz .L003 | |
115 | bas %r14,.Ldisab-.Lpg0(%r13) | |
15e9b586 | 116 | .L003: st %r1,__LC_SUBCHANNEL_ID |
25d83cbf | 117 | lhi %r1,0 # mode 0 = esa |
4bfc86ce | 118 | slr %r0,%r0 # set cpuid to zero |
eb546195 | 119 | sigp %r1,%r0,SIGP_SET_ARCHITECTURE # switch to esa mode |
25d83cbf HC |
120 | lpsw 0 |
121 | .Ldisab: sll %r14,1 | |
122 | srl %r14,1 # need to kill hi bit to avoid specification exceptions. | |
123 | st %r14,.Ldispsw+12-.Lpg0(%r13) | |
1da177e4 | 124 | lpswe .Ldispsw-.Lpg0(%r13) |
25d83cbf | 125 | .align 8 |
1da177e4 | 126 | .Lall: .quad 0x00000000ff000000 |
25d83cbf | 127 | .align 16 |
1da177e4 LT |
128 | /* |
129 | * These addresses have to be 31 bit otherwise | |
130 | * the sigp will throw a specifcation exception | |
131 | * when switching to ESA mode as bit 31 be set | |
132 | * in the ESA psw. | |
133 | * Bit 31 of the addresses has to be 0 for the | |
134 | * 31bit lpswe instruction a fact they appear to have | |
25985edc | 135 | * omitted from the pop. |
1da177e4 | 136 | */ |
25d83cbf HC |
137 | .Lnewpsw: .quad 0x0000000080000000 |
138 | .quad .Lpg1 | |
139 | .Lpcnew: .quad 0x0000000080000000 | |
140 | .quad .Lecs | |
141 | .Lionew: .quad 0x0000000080000000 | |
142 | .quad .Lcont | |
1da177e4 | 143 | .Lwaitpsw: .quad 0x0202000080000000 |
25d83cbf HC |
144 | .quad .Ltpi |
145 | .Ldispsw: .quad 0x0002000080000000 | |
146 | .quad 0x0000000000000000 | |
147 | .Liplccws: .long 0x02000000,0x60000018 | |
148 | .long 0x08000008,0x20000001 | |
1da177e4 LT |
149 | .Liplorb: .long 0x0049504c,0x0040ff80 |
150 | .long 0x00000000+.Liplccws | |
25d83cbf HC |
151 | .Lschib: .long 0x00000000,0x00000000 |
152 | .long 0x00000000,0x00000000 | |
153 | .long 0x00000000,0x00000000 | |
154 | .long 0x00000000,0x00000000 | |
155 | .long 0x00000000,0x00000000 | |
156 | .long 0x00000000,0x00000000 | |
1da177e4 LT |
157 | .Liplirb: .long 0x00000000,0x00000000 |
158 | .long 0x00000000,0x00000000 | |
159 | .long 0x00000000,0x00000000 | |
160 | .long 0x00000000,0x00000000 | |
161 | .long 0x00000000,0x00000000 | |
162 | .long 0x00000000,0x00000000 | |
163 | .long 0x00000000,0x00000000 | |
164 | .long 0x00000000,0x00000000 |