tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * arch/ppc64/kernel/ppc_asm.h
3 *
4 * Definitions used by various bits of low-level assembly code on PowerPC.
5 *
6 * Copyright (C) 1995-1999 Gary Thomas, Paul Mackerras, Cort Dougan.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
12 */
13
14#ifndef _PPC64_PPC_ASM_H
15#define _PPC64_PPC_ASM_H
16/*
17 * Macros for storing registers into and loading registers from
18 * exception frames.
19 */
20#define SAVE_GPR(n, base) std n,GPR0+8*(n)(base)
21#define SAVE_2GPRS(n, base) SAVE_GPR(n, base); SAVE_GPR(n+1, base)
22#define SAVE_4GPRS(n, base) SAVE_2GPRS(n, base); SAVE_2GPRS(n+2, base)
23#define SAVE_8GPRS(n, base) SAVE_4GPRS(n, base); SAVE_4GPRS(n+4, base)
24#define SAVE_10GPRS(n, base) SAVE_8GPRS(n, base); SAVE_2GPRS(n+8, base)
25#define REST_GPR(n, base) ld n,GPR0+8*(n)(base)
26#define REST_2GPRS(n, base) REST_GPR(n, base); REST_GPR(n+1, base)
27#define REST_4GPRS(n, base) REST_2GPRS(n, base); REST_2GPRS(n+2, base)
28#define REST_8GPRS(n, base) REST_4GPRS(n, base); REST_4GPRS(n+4, base)
29#define REST_10GPRS(n, base) REST_8GPRS(n, base); REST_2GPRS(n+8, base)
30
31#define SAVE_NVGPRS(base) SAVE_8GPRS(14, base); SAVE_10GPRS(22, base)
32#define REST_NVGPRS(base) REST_8GPRS(14, base); REST_10GPRS(22, base)
33
34#define SAVE_FPR(n, base) stfd n,THREAD_FPR0+8*(n)(base)
35#define SAVE_2FPRS(n, base) SAVE_FPR(n, base); SAVE_FPR(n+1, base)
36#define SAVE_4FPRS(n, base) SAVE_2FPRS(n, base); SAVE_2FPRS(n+2, base)
37#define SAVE_8FPRS(n, base) SAVE_4FPRS(n, base); SAVE_4FPRS(n+4, base)
38#define SAVE_16FPRS(n, base) SAVE_8FPRS(n, base); SAVE_8FPRS(n+8, base)
39#define SAVE_32FPRS(n, base) SAVE_16FPRS(n, base); SAVE_16FPRS(n+16, base)
40#define REST_FPR(n, base) lfd n,THREAD_FPR0+8*(n)(base)
41#define REST_2FPRS(n, base) REST_FPR(n, base); REST_FPR(n+1, base)
42#define REST_4FPRS(n, base) REST_2FPRS(n, base); REST_2FPRS(n+2, base)
43#define REST_8FPRS(n, base) REST_4FPRS(n, base); REST_4FPRS(n+4, base)
44#define REST_16FPRS(n, base) REST_8FPRS(n, base); REST_8FPRS(n+8, base)
45#define REST_32FPRS(n, base) REST_16FPRS(n, base); REST_16FPRS(n+16, base)
46
47#define SAVE_VR(n,b,base) li b,THREAD_VR0+(16*(n)); stvx n,b,base
48#define SAVE_2VRS(n,b,base) SAVE_VR(n,b,base); SAVE_VR(n+1,b,base)
49#define SAVE_4VRS(n,b,base) SAVE_2VRS(n,b,base); SAVE_2VRS(n+2,b,base)
50#define SAVE_8VRS(n,b,base) SAVE_4VRS(n,b,base); SAVE_4VRS(n+4,b,base)
51#define SAVE_16VRS(n,b,base) SAVE_8VRS(n,b,base); SAVE_8VRS(n+8,b,base)
52#define SAVE_32VRS(n,b,base) SAVE_16VRS(n,b,base); SAVE_16VRS(n+16,b,base)
53#define REST_VR(n,b,base) li b,THREAD_VR0+(16*(n)); lvx n,b,base
54#define REST_2VRS(n,b,base) REST_VR(n,b,base); REST_VR(n+1,b,base)
55#define REST_4VRS(n,b,base) REST_2VRS(n,b,base); REST_2VRS(n+2,b,base)
56#define REST_8VRS(n,b,base) REST_4VRS(n,b,base); REST_4VRS(n+4,b,base)
57#define REST_16VRS(n,b,base) REST_8VRS(n,b,base); REST_8VRS(n+8,b,base)
58#define REST_32VRS(n,b,base) REST_16VRS(n,b,base); REST_16VRS(n+16,b,base)
59
60/* Macros to adjust thread priority for Iseries hardware multithreading */
61#define HMT_LOW or 1,1,1
62#define HMT_MEDIUM or 2,2,2
63#define HMT_HIGH or 3,3,3
64
65/* Insert the high 32 bits of the MSR into what will be the new
66 MSR (via SRR1 and rfid) This preserves the MSR.SF and MSR.ISF
67 bits. */
68
69#define FIX_SRR1(ra, rb) \
70 mr rb,ra; \
71 mfmsr ra; \
72 rldimi ra,rb,0,32
73
74#define CLR_TOP32(r) rlwinm (r),(r),0,0,31 /* clear top 32 bits */
75
76/*
77 * LOADADDR( rn, name )
78 * loads the address of 'name' into 'rn'
79 *
80 * LOADBASE( rn, name )
81 * loads the address (less the low 16 bits) of 'name' into 'rn'
82 * suitable for base+disp addressing
83 */
84#define LOADADDR(rn,name) \
85 lis rn,name##@highest; \
86 ori rn,rn,name##@higher; \
87 rldicr rn,rn,32,31; \
88 oris rn,rn,name##@h; \
89 ori rn,rn,name##@l
90
91#define LOADBASE(rn,name) \
92 lis rn,name@highest; \
93 ori rn,rn,name@higher; \
94 rldicr rn,rn,32,31; \
95 oris rn,rn,name@ha
96
97
98#define SET_REG_TO_CONST(reg, value) \
99 lis reg,(((value)>>48)&0xFFFF); \
100 ori reg,reg,(((value)>>32)&0xFFFF); \
101 rldicr reg,reg,32,31; \
102 oris reg,reg,(((value)>>16)&0xFFFF); \
103 ori reg,reg,((value)&0xFFFF);
104
105#define SET_REG_TO_LABEL(reg, label) \
106 lis reg,(label)@highest; \
107 ori reg,reg,(label)@higher; \
108 rldicr reg,reg,32,31; \
109 oris reg,reg,(label)@h; \
110 ori reg,reg,(label)@l;
111
112
113/* PPPBBB - DRENG If KERNELBASE is always 0xC0...,
114 * Then we can easily do this with one asm insn. -Peter
115 */
116#define tophys(rd,rs) \
117 lis rd,((KERNELBASE>>48)&0xFFFF); \
118 rldicr rd,rd,32,31; \
119 sub rd,rs,rd
120
121#define tovirt(rd,rs) \
122 lis rd,((KERNELBASE>>48)&0xFFFF); \
123 rldicr rd,rd,32,31; \
124 add rd,rs,rd
125
126/* Condition Register Bit Fields */
127
128#define cr0 0
129#define cr1 1
130#define cr2 2
131#define cr3 3
132#define cr4 4
133#define cr5 5
134#define cr6 6
135#define cr7 7
136
137
138/* General Purpose Registers (GPRs) */
139
140#define r0 0
141#define r1 1
142#define r2 2
143#define r3 3
144#define r4 4
145#define r5 5
146#define r6 6
147#define r7 7
148#define r8 8
149#define r9 9
150#define r10 10
151#define r11 11
152#define r12 12
153#define r13 13
154#define r14 14
155#define r15 15
156#define r16 16
157#define r17 17
158#define r18 18
159#define r19 19
160#define r20 20
161#define r21 21
162#define r22 22
163#define r23 23
164#define r24 24
165#define r25 25
166#define r26 26
167#define r27 27
168#define r28 28
169#define r29 29
170#define r30 30
171#define r31 31
172
173
174/* Floating Point Registers (FPRs) */
175
176#define fr0 0
177#define fr1 1
178#define fr2 2
179#define fr3 3
180#define fr4 4
181#define fr5 5
182#define fr6 6
183#define fr7 7
184#define fr8 8
185#define fr9 9
186#define fr10 10
187#define fr11 11
188#define fr12 12
189#define fr13 13
190#define fr14 14
191#define fr15 15
192#define fr16 16
193#define fr17 17
194#define fr18 18
195#define fr19 19
196#define fr20 20
197#define fr21 21
198#define fr22 22
199#define fr23 23
200#define fr24 24
201#define fr25 25
202#define fr26 26
203#define fr27 27
204#define fr28 28
205#define fr29 29
206#define fr30 30
207#define fr31 31
208
209#define vr0 0
210#define vr1 1
211#define vr2 2
212#define vr3 3
213#define vr4 4
214#define vr5 5
215#define vr6 6
216#define vr7 7
217#define vr8 8
218#define vr9 9
219#define vr10 10
220#define vr11 11
221#define vr12 12
222#define vr13 13
223#define vr14 14
224#define vr15 15
225#define vr16 16
226#define vr17 17
227#define vr18 18
228#define vr19 19
229#define vr20 20
230#define vr21 21
231#define vr22 22
232#define vr23 23
233#define vr24 24
234#define vr25 25
235#define vr26 26
236#define vr27 27
237#define vr28 28
238#define vr29 29
239#define vr30 30
240#define vr31 31
241
242#endif /* _PPC64_PPC_ASM_H */