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git.ipfire.org Git - thirdparty/kernel/stable.git/blob - arch/parisc/include/asm/assembly.h
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Copyright (C) 1999 Hewlett-Packard (Frank Rowand)
4 * Copyright (C) 1999 Philipp Rumpf <prumpf@tux.org>
5 * Copyright (C) 1999 SuSE GmbH
6 * Copyright (C) 2021 Helge Deller <deller@gmx.de>
9 #ifndef _PARISC_ASSEMBLY_H
10 #define _PARISC_ASSEMBLY_H
14 #define FRAME_SIZE 128
15 #define CALLEE_REG_FRAME_SIZE 144
17 #define ASM_ULONG_INSN .dword
18 #else /* CONFIG_64BIT */
21 #define CALLEE_REG_FRAME_SIZE 128
23 #define ASM_ULONG_INSN .word
26 /* Frame alignment for 32- and 64-bit */
27 #define FRAME_ALIGN 64
29 #define CALLEE_FLOAT_FRAME_SIZE 80
30 #define CALLEE_SAVE_FRAME_SIZE (CALLEE_REG_FRAME_SIZE + CALLEE_FLOAT_FRAME_SIZE)
36 # define PA_ASM_LEVEL 2.0w
38 # define PA_ASM_LEVEL 2.0
43 #define PA_ASM_LEVEL 1.1
46 /* Privilege level field in the rightmost two bits of the IA queues */
50 /* Space register used inside kernel */
67 #define COND(x) * ## x
68 #else /* CONFIG_64BIT */
81 /* the 64-bit pa gnu assembler unfortunately defaults to .level 1.1 or 2.0 so
82 * work around that for now... */
86 #include <asm/asm-offsets.h>
88 #include <asm/types.h>
90 #include <asm/asmregs.h>
94 * We provide two versions of each macro to convert from physical
95 * to virtual and vice versa. The "_r1" versions take one argument
96 * register, but trashes r1 to do the conversion. The other
97 * version takes two arguments: a src and destination register.
98 * However, the source and destination registers can not be
102 .macro tophys grvirt
, grphys
103 ldil L
%(__PAGE_OFFSET
), \grphys
104 sub \grvirt
, \grphys
, \grphys
107 .macro tovirt grphys
, grvirt
108 ldil L
%(__PAGE_OFFSET
), \grvirt
109 add \grphys
, \grvirt
, \grvirt
113 ldil L
%(__PAGE_OFFSET
), %r1
118 ldil L
%(__PAGE_OFFSET
), %r1
134 zdep
\r, 31-(\sa
), 32-(\sa
), \t
137 /* And the PA 2.0W shift left */
139 depd
,z
\r, 63-(\sa
), 64-(\sa
), \t
142 /* Shift Right for 32-bit. Clobbers upper 32-bit on PA2.0. */
144 extru
\r, 31-(\sa
), 32-(\sa
), \t
147 /* pa20w version of shift right */
149 extrd
,u
\r, 63-(\sa
), 64-(\sa
), \t
152 /* Extract unsigned for 32- and 64-bit
153 * The extru instruction leaves the most significant 32 bits of the
154 * target register in an undefined state on PA 2.0 systems. */
155 .macro extru_safe r
, p
, len
, t
157 extrd
,u
\r, 32+(\p
), \len
, \t
159 extru
\r, \p
, \len
, \t
163 /* The depi instruction leaves the most significant 32 bits of the
164 * target register in an undefined state on PA 2.0 systems. */
165 .macro depi_safe i
, p
, len
, t
167 depdi \i
, 32+(\p
), \len
, \t
169 depi \i
, \p
, \len
, \t
173 /* The depw instruction leaves the most significant 32 bits of the
174 * target register in an undefined state on PA 2.0 systems. */
175 .macro dep_safe i
, p
, len
, t
177 depd \i
, 32+(\p
), \len
, \t
179 depw \i
, \p
, \len
, \t
183 /* load 32-bit 'value' into 'reg' compensating for the ldil
184 * sign-extension when running in wide mode.
185 * WARNING!! neither 'value' nor 'reg' can be expressions
186 * containing '.'!!!! */
187 .macro load32 value
, reg
189 ldo R
%\value
(\reg
), \reg
195 ldo R
%__gp(%r27
), %r27
197 ldil L
%$global$
, %r27
198 ldo R
%$global$
(%r27
), %r27
202 #define SAVE_SP(r, where) mfsp r, %r1 ! STREG %r1, where
203 #define REST_SP(r, where) LDREG where, %r1 ! mtsp %r1, r
204 #define SAVE_CR(r, where) mfctl r, %r1 ! STREG %r1, where
205 #define REST_CR(r, where) LDREG where, %r1 ! mtctl %r1, r
207 .macro save_general regs
208 STREG
%r1
, PT_GR1 (\regs
)
209 STREG
%r2
, PT_GR2 (\regs
)
210 STREG
%r3
, PT_GR3 (\regs
)
211 STREG
%r4
, PT_GR4 (\regs
)
212 STREG
%r5
, PT_GR5 (\regs
)
213 STREG
%r6
, PT_GR6 (\regs
)
214 STREG
%r7
, PT_GR7 (\regs
)
215 STREG
%r8
, PT_GR8 (\regs
)
216 STREG
%r9
, PT_GR9 (\regs
)
217 STREG
%r10
, PT_GR10(\regs
)
218 STREG
%r11
, PT_GR11(\regs
)
219 STREG
%r12
, PT_GR12(\regs
)
220 STREG
%r13
, PT_GR13(\regs
)
221 STREG
%r14
, PT_GR14(\regs
)
222 STREG
%r15
, PT_GR15(\regs
)
223 STREG
%r16
, PT_GR16(\regs
)
224 STREG
%r17
, PT_GR17(\regs
)
225 STREG
%r18
, PT_GR18(\regs
)
226 STREG
%r19
, PT_GR19(\regs
)
227 STREG
%r20
, PT_GR20(\regs
)
228 STREG
%r21
, PT_GR21(\regs
)
229 STREG
%r22
, PT_GR22(\regs
)
230 STREG
%r23
, PT_GR23(\regs
)
231 STREG
%r24
, PT_GR24(\regs
)
232 STREG
%r25
, PT_GR25(\regs
)
233 /* r26 is saved in get_stack and used to preserve a value across virt_map */
234 STREG
%r27
, PT_GR27(\regs
)
235 STREG
%r28
, PT_GR28(\regs
)
236 /* r29 is saved in get_stack and used to point to saved registers */
237 /* r30 stack pointer saved in get_stack */
238 STREG
%r31
, PT_GR31(\regs
)
241 .macro rest_general regs
242 /* r1 used as a temp in rest_stack and is restored there */
243 LDREG
PT_GR2 (\regs
), %r2
244 LDREG
PT_GR3 (\regs
), %r3
245 LDREG
PT_GR4 (\regs
), %r4
246 LDREG
PT_GR5 (\regs
), %r5
247 LDREG
PT_GR6 (\regs
), %r6
248 LDREG
PT_GR7 (\regs
), %r7
249 LDREG
PT_GR8 (\regs
), %r8
250 LDREG
PT_GR9 (\regs
), %r9
251 LDREG
PT_GR10(\regs
), %r10
252 LDREG
PT_GR11(\regs
), %r11
253 LDREG
PT_GR12(\regs
), %r12
254 LDREG
PT_GR13(\regs
), %r13
255 LDREG
PT_GR14(\regs
), %r14
256 LDREG
PT_GR15(\regs
), %r15
257 LDREG
PT_GR16(\regs
), %r16
258 LDREG
PT_GR17(\regs
), %r17
259 LDREG
PT_GR18(\regs
), %r18
260 LDREG
PT_GR19(\regs
), %r19
261 LDREG
PT_GR20(\regs
), %r20
262 LDREG
PT_GR21(\regs
), %r21
263 LDREG
PT_GR22(\regs
), %r22
264 LDREG
PT_GR23(\regs
), %r23
265 LDREG
PT_GR24(\regs
), %r24
266 LDREG
PT_GR25(\regs
), %r25
267 LDREG
PT_GR26(\regs
), %r26
268 LDREG
PT_GR27(\regs
), %r27
269 LDREG
PT_GR28(\regs
), %r28
270 /* r29 points to register save area, and is restored in rest_stack */
271 /* r30 stack pointer restored in rest_stack */
272 LDREG
PT_GR31(\regs
), %r31
276 fstd
,ma
%fr0
, 8(\regs
)
277 fstd
,ma
%fr1
, 8(\regs
)
278 fstd
,ma
%fr2
, 8(\regs
)
279 fstd
,ma
%fr3
, 8(\regs
)
280 fstd
,ma
%fr4
, 8(\regs
)
281 fstd
,ma
%fr5
, 8(\regs
)
282 fstd
,ma
%fr6
, 8(\regs
)
283 fstd
,ma
%fr7
, 8(\regs
)
284 fstd
,ma
%fr8
, 8(\regs
)
285 fstd
,ma
%fr9
, 8(\regs
)
286 fstd
,ma
%fr10
, 8(\regs
)
287 fstd
,ma
%fr11
, 8(\regs
)
288 fstd
,ma
%fr12
, 8(\regs
)
289 fstd
,ma
%fr13
, 8(\regs
)
290 fstd
,ma
%fr14
, 8(\regs
)
291 fstd
,ma
%fr15
, 8(\regs
)
292 fstd
,ma
%fr16
, 8(\regs
)
293 fstd
,ma
%fr17
, 8(\regs
)
294 fstd
,ma
%fr18
, 8(\regs
)
295 fstd
,ma
%fr19
, 8(\regs
)
296 fstd
,ma
%fr20
, 8(\regs
)
297 fstd
,ma
%fr21
, 8(\regs
)
298 fstd
,ma
%fr22
, 8(\regs
)
299 fstd
,ma
%fr23
, 8(\regs
)
300 fstd
,ma
%fr24
, 8(\regs
)
301 fstd
,ma
%fr25
, 8(\regs
)
302 fstd
,ma
%fr26
, 8(\regs
)
303 fstd
,ma
%fr27
, 8(\regs
)
304 fstd
,ma
%fr28
, 8(\regs
)
305 fstd
,ma
%fr29
, 8(\regs
)
306 fstd
,ma
%fr30
, 8(\regs
)
312 fldd
,mb
-8(\regs
), %fr30
313 fldd
,mb
-8(\regs
), %fr29
314 fldd
,mb
-8(\regs
), %fr28
315 fldd
,mb
-8(\regs
), %fr27
316 fldd
,mb
-8(\regs
), %fr26
317 fldd
,mb
-8(\regs
), %fr25
318 fldd
,mb
-8(\regs
), %fr24
319 fldd
,mb
-8(\regs
), %fr23
320 fldd
,mb
-8(\regs
), %fr22
321 fldd
,mb
-8(\regs
), %fr21
322 fldd
,mb
-8(\regs
), %fr20
323 fldd
,mb
-8(\regs
), %fr19
324 fldd
,mb
-8(\regs
), %fr18
325 fldd
,mb
-8(\regs
), %fr17
326 fldd
,mb
-8(\regs
), %fr16
327 fldd
,mb
-8(\regs
), %fr15
328 fldd
,mb
-8(\regs
), %fr14
329 fldd
,mb
-8(\regs
), %fr13
330 fldd
,mb
-8(\regs
), %fr12
331 fldd
,mb
-8(\regs
), %fr11
332 fldd
,mb
-8(\regs
), %fr10
333 fldd
,mb
-8(\regs
), %fr9
334 fldd
,mb
-8(\regs
), %fr8
335 fldd
,mb
-8(\regs
), %fr7
336 fldd
,mb
-8(\regs
), %fr6
337 fldd
,mb
-8(\regs
), %fr5
338 fldd
,mb
-8(\regs
), %fr4
339 fldd
,mb
-8(\regs
), %fr3
340 fldd
,mb
-8(\regs
), %fr2
341 fldd
,mb
-8(\regs
), %fr1
342 fldd
,mb
-8(\regs
), %fr0
345 .macro callee_save_float
346 fstd
,ma
%fr12
, 8(%r30
)
347 fstd
,ma
%fr13
, 8(%r30
)
348 fstd
,ma
%fr14
, 8(%r30
)
349 fstd
,ma
%fr15
, 8(%r30
)
350 fstd
,ma
%fr16
, 8(%r30
)
351 fstd
,ma
%fr17
, 8(%r30
)
352 fstd
,ma
%fr18
, 8(%r30
)
353 fstd
,ma
%fr19
, 8(%r30
)
354 fstd
,ma
%fr20
, 8(%r30
)
355 fstd
,ma
%fr21
, 8(%r30
)
358 .macro callee_rest_float
359 fldd
,mb
-8(%r30
), %fr21
360 fldd
,mb
-8(%r30
), %fr20
361 fldd
,mb
-8(%r30
), %fr19
362 fldd
,mb
-8(%r30
), %fr18
363 fldd
,mb
-8(%r30
), %fr17
364 fldd
,mb
-8(%r30
), %fr16
365 fldd
,mb
-8(%r30
), %fr15
366 fldd
,mb
-8(%r30
), %fr14
367 fldd
,mb
-8(%r30
), %fr13
368 fldd
,mb
-8(%r30
), %fr12
373 std
,ma
%r3
, CALLEE_REG_FRAME_SIZE(%r30
)
411 ldd
,mb
-CALLEE_REG_FRAME_SIZE(%r30
), %r3
414 #else /* ! CONFIG_64BIT */
417 stw
,ma
%r3
, CALLEE_REG_FRAME_SIZE(%r30
)
455 ldw
,mb
-CALLEE_REG_FRAME_SIZE(%r30
), %r3
457 #endif /* ! CONFIG_64BIT */
459 .macro save_specials regs
461 SAVE_SP (%sr0
, PT_SR0 (\regs
))
462 SAVE_SP (%sr1
, PT_SR1 (\regs
))
463 SAVE_SP (%sr2
, PT_SR2 (\regs
))
464 SAVE_SP (%sr3
, PT_SR3 (\regs
))
465 SAVE_SP (%sr4
, PT_SR4 (\regs
))
466 SAVE_SP (%sr5
, PT_SR5 (\regs
))
467 SAVE_SP (%sr6
, PT_SR6 (\regs
))
469 SAVE_CR (%cr17
, PT_IASQ0(\regs
))
471 SAVE_CR (%cr17
, PT_IASQ1(\regs
))
473 SAVE_CR (%cr18
, PT_IAOQ0(\regs
))
475 SAVE_CR (%cr18
, PT_IAOQ1(\regs
))
478 /* cr11 (sar) is a funny one. 5 bits on PA1.1 and 6 bit on PA2.0
479 * For PA2.0 mtsar or mtctl always write 6 bits, but mfctl only
480 * reads 5 bits. Use mfctl,w to read all six bits. Otherwise
481 * we lose the 6th bit on a save/restore over interrupt.
484 STREG
%r1
, PT_SAR (\regs
)
486 SAVE_CR (%cr11
, PT_SAR (\regs
))
488 SAVE_CR (%cr19
, PT_IIR (\regs
))
491 * Code immediately following this macro (in intr_save) relies
492 * on r8 containing ipsw.
495 STREG
%r8
, PT_PSW(\regs
)
498 .macro rest_specials regs
500 REST_SP (%sr0
, PT_SR0 (\regs
))
501 REST_SP (%sr1
, PT_SR1 (\regs
))
502 REST_SP (%sr2
, PT_SR2 (\regs
))
503 REST_SP (%sr3
, PT_SR3 (\regs
))
504 REST_SP (%sr4
, PT_SR4 (\regs
))
505 REST_SP (%sr5
, PT_SR5 (\regs
))
506 REST_SP (%sr6
, PT_SR6 (\regs
))
507 REST_SP (%sr7
, PT_SR7 (\regs
))
509 REST_CR (%cr17
, PT_IASQ0(\regs
))
510 REST_CR (%cr17
, PT_IASQ1(\regs
))
512 REST_CR (%cr18
, PT_IAOQ0(\regs
))
513 REST_CR (%cr18
, PT_IAOQ1(\regs
))
515 REST_CR (%cr11
, PT_SAR (\regs
))
517 REST_CR (%cr22
, PT_PSW (\regs
))
521 /* First step to create a "relied upon translation"
522 * See PA 2.0 Arch. page F-4 and F-5.
524 * The ssm was originally necessary due to a "PCxT bug".
525 * But someone decided it needed to be added to the architecture
526 * and this "feature" went into rev3 of PA-RISC 1.1 Arch Manual.
527 * It's been carried forward into PA 2.0 Arch as well. :^(
529 * "ssm 0,%r0" is a NOP with side effects (prefetch barrier).
530 * rsm/ssm prevents the ifetch unit from speculatively fetching
531 * instructions past this line in the code stream.
532 * PA 2.0 processor will single step all insn in the same QUAD (4 insn).
545 /* Switch to virtual mapping, trashing only %r1 */
548 rsm PSW_SM_I
, %r0
/* barrier for "Relied upon Translation */
553 load32 KERNEL_PSW
, %r1
555 rsm PSW_SM_QUIET
,%r0
/* second "heavy weight" ctl op */
556 mtctl
%r0
, %cr17
/* Clear IIASQ tail */
557 mtctl
%r0
, %cr17
/* Clear IIASQ head */
560 mtctl
%r1
, %cr18
/* Set IIAOQ tail */
562 mtctl
%r1
, %cr18
/* Set IIAOQ head */
570 * ASM_EXCEPTIONTABLE_ENTRY
572 * Creates an exception table entry.
573 * Do not convert to a assembler macro. This won't work.
575 #define ASM_EXCEPTIONTABLE_ENTRY(fault_addr, except_addr) \
576 .section __ex_table,"aw" ! \
577 .word (fault_addr - .), (except_addr - .) ! \
581 #endif /* __ASSEMBLY__ */