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