Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
1/*
2 * include/asm-ppc/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#include <linux/config.h>
15
16/*
17 * Macros for storing registers into and loading registers from
18 * exception frames.
19 */
20#define SAVE_GPR(n, base) stw n,GPR0+4*(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) lwz n,GPR0+4*(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_GPR(13, base); SAVE_8GPRS(14, base); \
32 SAVE_10GPRS(22, base)
33#define REST_NVGPRS(base) REST_GPR(13, base); REST_8GPRS(14, base); \
34 REST_10GPRS(22, base)
35
36#define SAVE_FPR(n, base) stfd n,THREAD_FPR0+8*(n)(base)
37#define SAVE_2FPRS(n, base) SAVE_FPR(n, base); SAVE_FPR(n+1, base)
38#define SAVE_4FPRS(n, base) SAVE_2FPRS(n, base); SAVE_2FPRS(n+2, base)
39#define SAVE_8FPRS(n, base) SAVE_4FPRS(n, base); SAVE_4FPRS(n+4, base)
40#define SAVE_16FPRS(n, base) SAVE_8FPRS(n, base); SAVE_8FPRS(n+8, base)
41#define SAVE_32FPRS(n, base) SAVE_16FPRS(n, base); SAVE_16FPRS(n+16, base)
42#define REST_FPR(n, base) lfd n,THREAD_FPR0+8*(n)(base)
43#define REST_2FPRS(n, base) REST_FPR(n, base); REST_FPR(n+1, base)
44#define REST_4FPRS(n, base) REST_2FPRS(n, base); REST_2FPRS(n+2, base)
45#define REST_8FPRS(n, base) REST_4FPRS(n, base); REST_4FPRS(n+4, base)
46#define REST_16FPRS(n, base) REST_8FPRS(n, base); REST_8FPRS(n+8, base)
47#define REST_32FPRS(n, base) REST_16FPRS(n, base); REST_16FPRS(n+16, base)
48
49#define SAVE_VR(n,b,base) li b,THREAD_VR0+(16*(n)); stvx n,b,base
50#define SAVE_2VR(n,b,base) SAVE_VR(n,b,base); SAVE_VR(n+1,b,base)
51#define SAVE_4VR(n,b,base) SAVE_2VR(n,b,base); SAVE_2VR(n+2,b,base)
52#define SAVE_8VR(n,b,base) SAVE_4VR(n,b,base); SAVE_4VR(n+4,b,base)
53#define SAVE_16VR(n,b,base) SAVE_8VR(n,b,base); SAVE_8VR(n+8,b,base)
54#define SAVE_32VR(n,b,base) SAVE_16VR(n,b,base); SAVE_16VR(n+16,b,base)
55#define REST_VR(n,b,base) li b,THREAD_VR0+(16*(n)); lvx n,b,base
56#define REST_2VR(n,b,base) REST_VR(n,b,base); REST_VR(n+1,b,base)
57#define REST_4VR(n,b,base) REST_2VR(n,b,base); REST_2VR(n+2,b,base)
58#define REST_8VR(n,b,base) REST_4VR(n,b,base); REST_4VR(n+4,b,base)
59#define REST_16VR(n,b,base) REST_8VR(n,b,base); REST_8VR(n+8,b,base)
60#define REST_32VR(n,b,base) REST_16VR(n,b,base); REST_16VR(n+16,b,base)
61
62#define SAVE_EVR(n,s,base) evmergehi s,s,n; stw s,THREAD_EVR0+4*(n)(base)
63#define SAVE_2EVR(n,s,base) SAVE_EVR(n,s,base); SAVE_EVR(n+1,s,base)
64#define SAVE_4EVR(n,s,base) SAVE_2EVR(n,s,base); SAVE_2EVR(n+2,s,base)
65#define SAVE_8EVR(n,s,base) SAVE_4EVR(n,s,base); SAVE_4EVR(n+4,s,base)
66#define SAVE_16EVR(n,s,base) SAVE_8EVR(n,s,base); SAVE_8EVR(n+8,s,base)
67#define SAVE_32EVR(n,s,base) SAVE_16EVR(n,s,base); SAVE_16EVR(n+16,s,base)
68
69#define REST_EVR(n,s,base) lwz s,THREAD_EVR0+4*(n)(base); evmergelo n,s,n
70#define REST_2EVR(n,s,base) REST_EVR(n,s,base); REST_EVR(n+1,s,base)
71#define REST_4EVR(n,s,base) REST_2EVR(n,s,base); REST_2EVR(n+2,s,base)
72#define REST_8EVR(n,s,base) REST_4EVR(n,s,base); REST_4EVR(n+4,s,base)
73#define REST_16EVR(n,s,base) REST_8EVR(n,s,base); REST_8EVR(n+8,s,base)
74#define REST_32EVR(n,s,base) REST_16EVR(n,s,base); REST_16EVR(n+16,s,base)
75
76#ifdef CONFIG_PPC601_SYNC_FIX
77#define SYNC \
78BEGIN_FTR_SECTION \
79 sync; \
80 isync; \
81END_FTR_SECTION_IFSET(CPU_FTR_601)
82#define SYNC_601 \
83BEGIN_FTR_SECTION \
84 sync; \
85END_FTR_SECTION_IFSET(CPU_FTR_601)
86#define ISYNC_601 \
87BEGIN_FTR_SECTION \
88 isync; \
89END_FTR_SECTION_IFSET(CPU_FTR_601)
90#else
91#define SYNC
92#define SYNC_601
93#define ISYNC_601
94#endif
95
96#ifndef CONFIG_SMP
97#define TLBSYNC
98#else /* CONFIG_SMP */
99/* tlbsync is not implemented on 601 */
100#define TLBSYNC \
101BEGIN_FTR_SECTION \
102 tlbsync; \
103 sync; \
104END_FTR_SECTION_IFCLR(CPU_FTR_601)
105#endif
106
107/*
108 * This instruction is not implemented on the PPC 603 or 601; however, on
109 * the 403GCX and 405GP tlbia IS defined and tlbie is not.
110 * All of these instructions exist in the 8xx, they have magical powers,
111 * and they must be used.
112 */
113
114#if !defined(CONFIG_4xx) && !defined(CONFIG_8xx)
115#define tlbia \
116 li r4,1024; \
117 mtctr r4; \
118 lis r4,KERNELBASE@h; \
1190: tlbie r4; \
120 addi r4,r4,0x1000; \
121 bdnz 0b
122#endif
123
124#ifdef CONFIG_BOOKE
125#define tophys(rd,rs) \
126 addis rd,rs,0
127
128#define tovirt(rd,rs) \
129 addis rd,rs,0
130
131#else /* CONFIG_BOOKE */
132/*
133 * On APUS (Amiga PowerPC cpu upgrade board), we don't know the
134 * physical base address of RAM at compile time.
135 */
136#define tophys(rd,rs) \
1370: addis rd,rs,-KERNELBASE@h; \
138 .section ".vtop_fixup","aw"; \
139 .align 1; \
140 .long 0b; \
141 .previous
142
143#define tovirt(rd,rs) \
1440: addis rd,rs,KERNELBASE@h; \
145 .section ".ptov_fixup","aw"; \
146 .align 1; \
147 .long 0b; \
148 .previous
149#endif /* CONFIG_BOOKE */
150
151/*
152 * On 64-bit cpus, we use the rfid instruction instead of rfi, but
153 * we then have to make sure we preserve the top 32 bits except for
154 * the 64-bit mode bit, which we clear.
155 */
156#ifdef CONFIG_PPC64BRIDGE
157#define FIX_SRR1(ra, rb) \
158 mr rb,ra; \
159 mfmsr ra; \
160 clrldi ra,ra,1; /* turn off 64-bit mode */ \
161 rldimi ra,rb,0,32
162#define RFI .long 0x4c000024 /* rfid instruction */
163#define MTMSRD(r) .long (0x7c000164 + ((r) << 21)) /* mtmsrd */
164#define CLR_TOP32(r) rlwinm (r),(r),0,0,31 /* clear top 32 bits */
165
166#else
167#define FIX_SRR1(ra, rb)
168#ifndef CONFIG_40x
169#define RFI rfi
170#else
171#define RFI rfi; b . /* Prevent prefetch past rfi */
172#endif
173#define MTMSRD(r) mtmsr r
174#define CLR_TOP32(r)
175#endif /* CONFIG_PPC64BRIDGE */
176
177#define RFCI .long 0x4c000066 /* rfci instruction */
178#define RFDI .long 0x4c00004e /* rfdi instruction */
179#define RFMCI .long 0x4c00004c /* rfmci instruction */
180
181#ifdef CONFIG_IBM405_ERR77
182#define PPC405_ERR77(ra,rb) dcbt ra, rb;
183#define PPC405_ERR77_SYNC sync;
184#else
185#define PPC405_ERR77(ra,rb)
186#define PPC405_ERR77_SYNC
187#endif
188
189/* The boring bits... */
190
191/* Condition Register Bit Fields */
192
193#define cr0 0
194#define cr1 1
195#define cr2 2
196#define cr3 3
197#define cr4 4
198#define cr5 5
199#define cr6 6
200#define cr7 7
201
202
203/* General Purpose Registers (GPRs) */
204
205#define r0 0
206#define r1 1
207#define r2 2
208#define r3 3
209#define r4 4
210#define r5 5
211#define r6 6
212#define r7 7
213#define r8 8
214#define r9 9
215#define r10 10
216#define r11 11
217#define r12 12
218#define r13 13
219#define r14 14
220#define r15 15
221#define r16 16
222#define r17 17
223#define r18 18
224#define r19 19
225#define r20 20
226#define r21 21
227#define r22 22
228#define r23 23
229#define r24 24
230#define r25 25
231#define r26 26
232#define r27 27
233#define r28 28
234#define r29 29
235#define r30 30
236#define r31 31
237
238
239/* Floating Point Registers (FPRs) */
240
241#define fr0 0
242#define fr1 1
243#define fr2 2
244#define fr3 3
245#define fr4 4
246#define fr5 5
247#define fr6 6
248#define fr7 7
249#define fr8 8
250#define fr9 9
251#define fr10 10
252#define fr11 11
253#define fr12 12
254#define fr13 13
255#define fr14 14
256#define fr15 15
257#define fr16 16
258#define fr17 17
259#define fr18 18
260#define fr19 19
261#define fr20 20
262#define fr21 21
263#define fr22 22
264#define fr23 23
265#define fr24 24
266#define fr25 25
267#define fr26 26
268#define fr27 27
269#define fr28 28
270#define fr29 29
271#define fr30 30
272#define fr31 31
273
274#define vr0 0
275#define vr1 1
276#define vr2 2
277#define vr3 3
278#define vr4 4
279#define vr5 5
280#define vr6 6
281#define vr7 7
282#define vr8 8
283#define vr9 9
284#define vr10 10
285#define vr11 11
286#define vr12 12
287#define vr13 13
288#define vr14 14
289#define vr15 15
290#define vr16 16
291#define vr17 17
292#define vr18 18
293#define vr19 19
294#define vr20 20
295#define vr21 21
296#define vr22 22
297#define vr23 23
298#define vr24 24
299#define vr25 25
300#define vr26 26
301#define vr27 27
302#define vr28 28
303#define vr29 29
304#define vr30 30
305#define vr31 31
306
307#define evr0 0
308#define evr1 1
309#define evr2 2
310#define evr3 3
311#define evr4 4
312#define evr5 5
313#define evr6 6
314#define evr7 7
315#define evr8 8
316#define evr9 9
317#define evr10 10
318#define evr11 11
319#define evr12 12
320#define evr13 13
321#define evr14 14
322#define evr15 15
323#define evr16 16
324#define evr17 17
325#define evr18 18
326#define evr19 19
327#define evr20 20
328#define evr21 21
329#define evr22 22
330#define evr23 23
331#define evr24 24
332#define evr25 25
333#define evr26 26
334#define evr27 27
335#define evr28 28
336#define evr29 29
337#define evr30 30
338#define evr31 31
339
340/* some stab codes */
341#define N_FUN 36
342#define N_RSYM 64
343#define N_SLINE 68
344#define N_SO 100