Avoid beyond bounds copy while caching ACL
[zen-stable.git] / arch / s390 / kernel / reipl64.S
blob36b32658fb241146d86d672fd498781b3180e441
1 /*
2  *    Copyright IBM Corp 2000,2011
3  *    Author(s): Holger Smolinski <Holger.Smolinski@de.ibm.com>,
4  *               Denis Joseph Barrow,
5  */
7 #include <linux/linkage.h>
8 #include <asm/asm-offsets.h>
11 # store_status
13 # Prerequisites to run this function:
14 # - Prefix register is set to zero
15 # - Original prefix register is stored in "dump_prefix_page"
16 # - Lowcore protection is off
18 ENTRY(store_status)
19         /* Save register one and load save area base */
20         stg     %r1,__LC_SAVE_AREA_RESTART
21         lghi    %r1,SAVE_AREA_BASE
22         /* General purpose registers */
23         stmg    %r0,%r15,__LC_GPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
24         lg      %r2,__LC_SAVE_AREA_RESTART
25         stg     %r2,__LC_GPREGS_SAVE_AREA-SAVE_AREA_BASE+8(%r1)
26         /* Control registers */
27         stctg   %c0,%c15,__LC_CREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
28         /* Access registers */
29         stam    %a0,%a15,__LC_AREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
30         /* Floating point registers */
31         std     %f0, 0x00 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
32         std     %f1, 0x08 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
33         std     %f2, 0x10 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
34         std     %f3, 0x18 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
35         std     %f4, 0x20 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
36         std     %f5, 0x28 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
37         std     %f6, 0x30 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
38         std     %f7, 0x38 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
39         std     %f8, 0x40 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
40         std     %f9, 0x48 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
41         std     %f10,0x50 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
42         std     %f11,0x58 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
43         std     %f12,0x60 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
44         std     %f13,0x68 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
45         std     %f14,0x70 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
46         std     %f15,0x78 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
47         /* Floating point control register */
48         stfpc   __LC_FP_CREG_SAVE_AREA-SAVE_AREA_BASE(%r1)
49         /* CPU timer */
50         stpt    __LC_CPU_TIMER_SAVE_AREA-SAVE_AREA_BASE(%r1)
51         /* Saved prefix register */
52         larl    %r2,dump_prefix_page
53         mvc     __LC_PREFIX_SAVE_AREA-SAVE_AREA_BASE(4,%r1),0(%r2)
54         /* Clock comparator - seven bytes */
55         larl    %r2,.Lclkcmp
56         stckc   0(%r2)
57         mvc     __LC_CLOCK_COMP_SAVE_AREA-SAVE_AREA_BASE + 1(7,%r1),1(%r2)
58         /* Program status word */
59         epsw    %r2,%r3
60         st      %r2,__LC_PSW_SAVE_AREA-SAVE_AREA_BASE + 0(%r1)
61         st      %r3,__LC_PSW_SAVE_AREA-SAVE_AREA_BASE + 4(%r1)
62         larl    %r2,store_status
63         stg     %r2,__LC_PSW_SAVE_AREA-SAVE_AREA_BASE + 8(%r1)
64         br      %r14
66         .section .bss
67         .align  8
68 .Lclkcmp:       .quad   0x0000000000000000
69         .previous
72 # do_reipl_asm
73 # Parameter: r2 = schid of reipl device
76 ENTRY(do_reipl_asm)
77                 basr    %r13,0
78 .Lpg0:          lpswe   .Lnewpsw-.Lpg0(%r13)
79 .Lpg1:          brasl   %r14,store_status
81                 lctlg   %c6,%c6,.Lall-.Lpg0(%r13)
82                 lgr     %r1,%r2
83                 mvc     __LC_PGM_NEW_PSW(16),.Lpcnew-.Lpg0(%r13)
84                 stsch   .Lschib-.Lpg0(%r13)
85                 oi      .Lschib+5-.Lpg0(%r13),0x84
86 .Lecs:          xi      .Lschib+27-.Lpg0(%r13),0x01
87                 msch    .Lschib-.Lpg0(%r13)
88                 lghi    %r0,5
89 .Lssch:         ssch    .Liplorb-.Lpg0(%r13)
90                 jz      .L001
91                 brct    %r0,.Lssch
92                 bas     %r14,.Ldisab-.Lpg0(%r13)
93 .L001:          mvc     __LC_IO_NEW_PSW(16),.Lionew-.Lpg0(%r13)
94 .Ltpi:          lpswe   .Lwaitpsw-.Lpg0(%r13)
95 .Lcont:         c       %r1,__LC_SUBCHANNEL_ID
96                 jnz     .Ltpi
97                 clc     __LC_IO_INT_PARM(4),.Liplorb-.Lpg0(%r13)
98                 jnz     .Ltpi
99                 tsch    .Liplirb-.Lpg0(%r13)
100                 tm      .Liplirb+9-.Lpg0(%r13),0xbf
101                 jz      .L002
102                 bas     %r14,.Ldisab-.Lpg0(%r13)
103 .L002:          tm      .Liplirb+8-.Lpg0(%r13),0xf3
104                 jz      .L003
105                 bas     %r14,.Ldisab-.Lpg0(%r13)
106 .L003:          st      %r1,__LC_SUBCHANNEL_ID
107                 lhi     %r1,0            # mode 0 = esa
108                 slr     %r0,%r0          # set cpuid to zero
109                 sigp    %r1,%r0,0x12     # switch to esa mode
110                 lpsw    0
111 .Ldisab:        sll     %r14,1
112                 srl     %r14,1           # need to kill hi bit to avoid specification exceptions.
113                 st      %r14,.Ldispsw+12-.Lpg0(%r13)
114                 lpswe   .Ldispsw-.Lpg0(%r13)
115                 .align  8
116 .Lall:          .quad   0x00000000ff000000
117                 .align  16
119  * These addresses have to be 31 bit otherwise
120  * the sigp will throw a specifcation exception
121  * when switching to ESA mode as bit 31 be set
122  * in the ESA psw.
123  * Bit 31 of the addresses has to be 0 for the
124  * 31bit lpswe instruction a fact they appear to have
125  * omitted from the pop.
126  */
127 .Lnewpsw:       .quad   0x0000000080000000
128                 .quad   .Lpg1
129 .Lpcnew:        .quad   0x0000000080000000
130                 .quad   .Lecs
131 .Lionew:        .quad   0x0000000080000000
132                 .quad   .Lcont
133 .Lwaitpsw:      .quad   0x0202000080000000
134                 .quad   .Ltpi
135 .Ldispsw:       .quad   0x0002000080000000
136                 .quad   0x0000000000000000
137 .Liplccws:      .long   0x02000000,0x60000018
138                 .long   0x08000008,0x20000001
139 .Liplorb:       .long   0x0049504c,0x0040ff80
140                 .long   0x00000000+.Liplccws
141 .Lschib:        .long   0x00000000,0x00000000
142                 .long   0x00000000,0x00000000
143                 .long   0x00000000,0x00000000
144                 .long   0x00000000,0x00000000
145                 .long   0x00000000,0x00000000
146                 .long   0x00000000,0x00000000
147 .Liplirb:       .long   0x00000000,0x00000000
148                 .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