Gitiles
Code Review Sign In
review.evervolv.com / android_kernel_oneplus_msm8996 / a41b51a1f7c15a1b00f30a3ad2d0373ad51b883d / . / arch / powerpc / kernel / misc.S
blob: ba16874fe294c003b6d28a65f25da53f8d23097a [file] [log] [blame]
Stephen Rothwell127efeb2006-06-28 11:55:49 +1000[diff] [blame]1/*
2 * This file contains miscellaneous low-level functions.
3 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
4 *
5 * Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
6 * and Paul Mackerras.
7 *
Stephen Rothwell127efeb2006-06-28 11:55:49 +1000[diff] [blame]8 * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
9 *
Michael Neulingc3b75bd2008-01-18 15:50:30 +1100[diff] [blame]10 * setjmp/longjmp code by Paul Mackerras.
11 *
Stephen Rothwell127efeb2006-06-28 11:55:49 +1000[diff] [blame]12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
16 */
17#include <asm/ppc_asm.h>
Stephen Rothwell94b146c2007-11-28 11:13:02 +1100[diff] [blame]18#include <asm/unistd.h>
Michael Neulingc3b75bd2008-01-18 15:50:30 +1100[diff] [blame]19#include <asm/asm-compat.h>
20#include <asm/asm-offsets.h>
Stephen Rothwell127efeb2006-06-28 11:55:49 +1000[diff] [blame]21
22 .text
23
Stephen Rothwell127efeb2006-06-28 11:55:49 +1000[diff] [blame]24/*
25 * Returns (address we are running at) - (address we were linked at)
26 * for use before the text and data are mapped to KERNELBASE.
27 */
28
29_GLOBAL(reloc_offset)
30 mflr r0
31 bl 1f
321: mflr r3
Paul Mackerrase31aa452008-08-30 11:41:12 +1000[diff] [blame]33 PPC_LL r4,(2f-1b)(r3)
Stephen Rothwell127efeb2006-06-28 11:55:49 +1000[diff] [blame]34 subf r3,r4,r3
35 mtlr r0
36 blr
37
Paul Mackerrase31aa452008-08-30 11:41:12 +1000[diff] [blame]38 .align 3
392: PPC_LONG 1b
40
Stephen Rothwell127efeb2006-06-28 11:55:49 +1000[diff] [blame]41/*
42 * add_reloc_offset(x) returns x + reloc_offset().
43 */
44_GLOBAL(add_reloc_offset)
45 mflr r0
46 bl 1f
471: mflr r5
Paul Mackerrase31aa452008-08-30 11:41:12 +1000[diff] [blame]48 PPC_LL r4,(2f-1b)(r5)
Stephen Rothwell127efeb2006-06-28 11:55:49 +1000[diff] [blame]49 subf r5,r4,r5
50 add r3,r3,r5
51 mtlr r0
52 blr
Stephen Rothwell94b146c2007-11-28 11:13:02 +1100[diff] [blame]53
Paul Mackerrase31aa452008-08-30 11:41:12 +1000[diff] [blame]54 .align 3
552: PPC_LONG 1b
56
Stephen Rothwell94b146c2007-11-28 11:13:02 +1100[diff] [blame]57_GLOBAL(kernel_execve)
58 li r0,__NR_execve
59 sc
60 bnslr
61 neg r3,r3
62 blr
Michael Neulingc3b75bd2008-01-18 15:50:30 +1100[diff] [blame]63
64_GLOBAL(setjmp)
65 mflr r0
66 PPC_STL r0,0(r3)
67 PPC_STL r1,SZL(r3)
68 PPC_STL r2,2*SZL(r3)
69 mfcr r0
70 PPC_STL r0,3*SZL(r3)
71 PPC_STL r13,4*SZL(r3)
72 PPC_STL r14,5*SZL(r3)
73 PPC_STL r15,6*SZL(r3)
74 PPC_STL r16,7*SZL(r3)
75 PPC_STL r17,8*SZL(r3)
76 PPC_STL r18,9*SZL(r3)
77 PPC_STL r19,10*SZL(r3)
78 PPC_STL r20,11*SZL(r3)
79 PPC_STL r21,12*SZL(r3)
80 PPC_STL r22,13*SZL(r3)
81 PPC_STL r23,14*SZL(r3)
82 PPC_STL r24,15*SZL(r3)
83 PPC_STL r25,16*SZL(r3)
84 PPC_STL r26,17*SZL(r3)
85 PPC_STL r27,18*SZL(r3)
86 PPC_STL r28,19*SZL(r3)
87 PPC_STL r29,20*SZL(r3)
88 PPC_STL r30,21*SZL(r3)
89 PPC_STL r31,22*SZL(r3)
90 li r3,0
91 blr
92
93_GLOBAL(longjmp)
94 PPC_LCMPI r4,0
95 bne 1f
96 li r4,1
971: PPC_LL r13,4*SZL(r3)
98 PPC_LL r14,5*SZL(r3)
99 PPC_LL r15,6*SZL(r3)
100 PPC_LL r16,7*SZL(r3)
101 PPC_LL r17,8*SZL(r3)
102 PPC_LL r18,9*SZL(r3)
103 PPC_LL r19,10*SZL(r3)
104 PPC_LL r20,11*SZL(r3)
105 PPC_LL r21,12*SZL(r3)
106 PPC_LL r22,13*SZL(r3)
107 PPC_LL r23,14*SZL(r3)
108 PPC_LL r24,15*SZL(r3)
109 PPC_LL r25,16*SZL(r3)
110 PPC_LL r26,17*SZL(r3)
111 PPC_LL r27,18*SZL(r3)
112 PPC_LL r28,19*SZL(r3)
113 PPC_LL r29,20*SZL(r3)
114 PPC_LL r30,21*SZL(r3)
115 PPC_LL r31,22*SZL(r3)
116 PPC_LL r0,3*SZL(r3)
117 mtcrf 0x38,r0
118 PPC_LL r0,0(r3)
119 PPC_LL r1,SZL(r3)
120 PPC_LL r2,2*SZL(r3)
121 mtlr r0
122 mr r3,r4
123 blr