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Commit | Line | Data |
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2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
127efeb2 SR |
2 | /* |
3 | * This file contains miscellaneous low-level functions. | |
4 | * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) | |
5 | * | |
6 | * Largely rewritten by Cort Dougan (cort@cs.nmt.edu) | |
7 | * and Paul Mackerras. | |
8 | * | |
127efeb2 SR |
9 | * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com) |
10 | * | |
c3b75bd7 | 11 | * setjmp/longjmp code by Paul Mackerras. |
127efeb2 SR |
12 | */ |
13 | #include <asm/ppc_asm.h> | |
94b146ce | 14 | #include <asm/unistd.h> |
c3b75bd7 MN |
15 | #include <asm/asm-compat.h> |
16 | #include <asm/asm-offsets.h> | |
9445aa1a | 17 | #include <asm/export.h> |
127efeb2 SR |
18 | |
19 | .text | |
20 | ||
127efeb2 SR |
21 | /* |
22 | * Returns (address we are running at) - (address we were linked at) | |
23 | * for use before the text and data are mapped to KERNELBASE. | |
127efeb2 | 24 | |
127efeb2 SR |
25 | * add_reloc_offset(x) returns x + reloc_offset(). |
26 | */ | |
0cc377d1 CL |
27 | |
28 | _GLOBAL(reloc_offset) | |
29 | li r3, 0 | |
127efeb2 SR |
30 | _GLOBAL(add_reloc_offset) |
31 | mflr r0 | |
32 | bl 1f | |
33 | 1: mflr r5 | |
e31aa453 | 34 | PPC_LL r4,(2f-1b)(r5) |
127efeb2 SR |
35 | subf r5,r4,r5 |
36 | add r3,r3,r5 | |
37 | mtlr r0 | |
38 | blr | |
94b146ce | 39 | |
e31aa453 PM |
40 | .align 3 |
41 | 2: PPC_LONG 1b | |
42 | ||
c3b75bd7 MN |
43 | _GLOBAL(setjmp) |
44 | mflr r0 | |
45 | PPC_STL r0,0(r3) | |
46 | PPC_STL r1,SZL(r3) | |
47 | PPC_STL r2,2*SZL(r3) | |
a1f3ae3f CL |
48 | #ifdef CONFIG_PPC32 |
49 | mfcr r12 | |
50 | stmw r12, 3*SZL(r3) | |
51 | #else | |
c3b75bd7 MN |
52 | mfcr r0 |
53 | PPC_STL r0,3*SZL(r3) | |
54 | PPC_STL r13,4*SZL(r3) | |
55 | PPC_STL r14,5*SZL(r3) | |
56 | PPC_STL r15,6*SZL(r3) | |
57 | PPC_STL r16,7*SZL(r3) | |
58 | PPC_STL r17,8*SZL(r3) | |
59 | PPC_STL r18,9*SZL(r3) | |
60 | PPC_STL r19,10*SZL(r3) | |
61 | PPC_STL r20,11*SZL(r3) | |
62 | PPC_STL r21,12*SZL(r3) | |
63 | PPC_STL r22,13*SZL(r3) | |
64 | PPC_STL r23,14*SZL(r3) | |
65 | PPC_STL r24,15*SZL(r3) | |
66 | PPC_STL r25,16*SZL(r3) | |
67 | PPC_STL r26,17*SZL(r3) | |
68 | PPC_STL r27,18*SZL(r3) | |
69 | PPC_STL r28,19*SZL(r3) | |
70 | PPC_STL r29,20*SZL(r3) | |
71 | PPC_STL r30,21*SZL(r3) | |
72 | PPC_STL r31,22*SZL(r3) | |
a1f3ae3f | 73 | #endif |
c3b75bd7 MN |
74 | li r3,0 |
75 | blr | |
76 | ||
77 | _GLOBAL(longjmp) | |
a1f3ae3f CL |
78 | #ifdef CONFIG_PPC32 |
79 | lmw r12, 3*SZL(r3) | |
80 | mtcrf 0x38, r12 | |
81 | #else | |
24c78586 | 82 | PPC_LL r13,4*SZL(r3) |
c3b75bd7 MN |
83 | PPC_LL r14,5*SZL(r3) |
84 | PPC_LL r15,6*SZL(r3) | |
85 | PPC_LL r16,7*SZL(r3) | |
86 | PPC_LL r17,8*SZL(r3) | |
87 | PPC_LL r18,9*SZL(r3) | |
88 | PPC_LL r19,10*SZL(r3) | |
89 | PPC_LL r20,11*SZL(r3) | |
90 | PPC_LL r21,12*SZL(r3) | |
91 | PPC_LL r22,13*SZL(r3) | |
92 | PPC_LL r23,14*SZL(r3) | |
93 | PPC_LL r24,15*SZL(r3) | |
94 | PPC_LL r25,16*SZL(r3) | |
95 | PPC_LL r26,17*SZL(r3) | |
96 | PPC_LL r27,18*SZL(r3) | |
97 | PPC_LL r28,19*SZL(r3) | |
98 | PPC_LL r29,20*SZL(r3) | |
99 | PPC_LL r30,21*SZL(r3) | |
100 | PPC_LL r31,22*SZL(r3) | |
101 | PPC_LL r0,3*SZL(r3) | |
102 | mtcrf 0x38,r0 | |
a1f3ae3f | 103 | #endif |
c3b75bd7 MN |
104 | PPC_LL r0,0(r3) |
105 | PPC_LL r1,SZL(r3) | |
106 | PPC_LL r2,2*SZL(r3) | |
107 | mtlr r0 | |
24c78586 CL |
108 | mr. r3, r4 |
109 | bnelr | |
110 | li r3, 1 | |
c3b75bd7 | 111 | blr |
bfe9a2cf | 112 | |
acf620ec | 113 | _GLOBAL(current_stack_pointer) |
bfe9a2cf AB |
114 | PPC_LL r3,0(r1) |
115 | blr | |
9445aa1a | 116 | EXPORT_SYMBOL(current_stack_pointer) |