xref: /titanic_51/usr/src/uts/sun4u/vm/mach_sfmmu.h (revision 791a814c934fcd4deb13b26c1f116ff283272a0d)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 /*
27  * VM - Hardware Address Translation management.
28  *
29  * This file describes the contents of the sun reference mmu (sfmmu)
30  * specific hat data structures and the sfmmu specific hat procedures.
31  * The machine independent interface is described in <vm/hat.h>.
32  */
33 
34 #ifndef _VM_MACH_SFMMU_H
35 #define	_VM_MACH_SFMMU_H
36 
37 #include <sys/x_call.h>
38 #include <sys/cheetahregs.h>
39 #include <sys/spitregs.h>
40 #include <sys/opl_olympus_regs.h>
41 #include <sys/mmu.h>
42 
43 #ifdef	__cplusplus
44 extern "C" {
45 #endif
46 
47 /*
48  * On sun4u platforms, user TSBs are accessed via virtual address by default.
49  * Platforms that support ASI_SCRATCHPAD registers can define UTSB_PHYS in the
50  * platform Makefile to access user TSBs via physical address but must also
51  * designate one ASI_SCRATCHPAD register to hold the second user TSB.  To
52  * designate the user TSB scratchpad register, platforms must provide a
53  * definition for SCRATCHPAD_UTSBREG2 below.
54  *
55  * Platforms that use UTSB_PHYS do not allocate 2 locked TLB entries to access
56  * the user TSBs.
57  */
58 #if defined(UTSB_PHYS)
59 
60 #if defined(_OPL)
61 #define	SCRATCHPAD_UTSBREG2	OPL_SCRATCHPAD_UTSBREG4 /* 4M-256M pages */
62 #define	SCRATCHPAD_UTSBREG3	OPL_SCRATCHPAD_UTSBREG5 /* 8K-512K pages */
63 #define	SCRATCHPAD_UTSBREG4	OPL_SCRATCHPAD_UTSBREG6 /* 4M-256M pages */
64 #else
65 #error "Compiling UTSB_PHYS but no SCRATCHPAD_UTSBREG2 specified"
66 #endif /* _OPL */
67 
68 #endif /* UTSB_PHYS */
69 
70 
71 #ifdef _ASM
72 
73 /*
74  * This macro is used to set private/shared secondary context register in
75  * sfmmu_alloc_ctx().
76  * if is_shctx = 0 then we set the SCONTEXT to cnum and invalidate the
77  * SHARED_CONTEXT register. If is_shctx = 1 then only the SHARED_CONTEXT
78  * register is set.
79  *  (See additional comments in sfmmu_alloc_ctx)
80  * Input:
81  * cnum     = cnum
82  * is_shctx = sfmmu private/shared flag (0: private, 1: shared)
83  * tmp1 :    %o4 scratch
84  * tmp2 :    %o5 scratch
85  * label: used as local branch targets
86  */
87 #define	SET_SECCTX(cnum, is_shctx, tmp1, tmp2, label)	   \
88 	/* BEGIN CSTYLED */				   \
89 	brnz,pn is_shctx, label/**/1			  ;\
90 	  sethi   %hi(FLUSH_ADDR), tmp2			  ;\
91 	mov     MMU_SCONTEXT, tmp1			  ;\
92 	stxa    cnum, [tmp1]ASI_MMU_CTX			  ;\
93 	flush   tmp2					  ;\
94 	sethi   %hi(shctx_on), tmp1			  ;\
95 	ld      [tmp1 + %lo(shctx_on)], tmp1		  ;\
96 	brz,pt  tmp1, label/**/3			  ;\
97 	mov    %g0, cnum				  ;\
98 	ba,pt    %xcc, label/**/2			  ;\
99 label/**/1:						  ;\
100 	set     SHCTXREG_VALID_BIT, tmp1		  ;\
101 	sllx    cnum, CTXREG_CTX_SHIFT, cnum		  ;\
102 	srlx    cnum, CTXREG_CTX_SHIFT, cnum		  ;\
103 	or      cnum, tmp1, cnum			  ;\
104 	mov     cnum, tmp1				  ;\
105 	sllx    cnum, 32, cnum				  ;\
106 	or      cnum, tmp1, cnum			  ;\
107 label/**/2:					          ;\
108 	mov     MMU_SHARED_CONTEXT, tmp1		  ;\
109 	stxa    cnum, [tmp1]ASI_MMU_CTX			  ;\
110 	flush   tmp2					  ;\
111 label/**/3:
112 	/* END CSTYLED */
113 
114 /*
115  * This macro is used in the MMU code to check if TL should be lowered from
116  * 2 to 1 to pop trapstat's state.  See the block comment in trapstat.c
117  * for details.
118  */
119 
120 #define	TSTAT_CHECK_TL1(label, scr1, scr2)			\
121 	rdpr	%tpc, scr1;					\
122 	sethi	%hi(KERNELBASE), scr2;				\
123 	or	scr2, %lo(KERNELBASE), scr2; 			\
124 	cmp	scr1, scr2; 					\
125 	bgeu	%xcc, 9f;					\
126 	    nop;						\
127 	ba	label;						\
128 	wrpr	%g0, 1, %tl;					\
129 9:
130 
131 
132 /*
133  * The following macros allow us to share majority of the
134  * SFMMU code between sun4u and sun4v platforms.
135  */
136 
137 #define	SETUP_TSB_ASI(qlp, tmp)					\
138 	movrz	qlp, ASI_N, tmp;				\
139 	movrnz	qlp, ASI_MEM, tmp;				\
140 	mov	tmp, %asi
141 
142 /*
143  * Macro to swtich to alternate global register on sun4u platforms
144  * (not applicable to sun4v platforms)
145  */
146 #define	USE_ALTERNATE_GLOBALS(scr)				\
147 	rdpr	%pstate, scr;					\
148 	wrpr	scr, PSTATE_MG | PSTATE_AG, %pstate
149 
150 /*
151  * Macro to set %gl register value on sun4v platforms
152  * (not applicable to sun4u platforms)
153  */
154 #define	SET_GL_REG(val)
155 
156 /*
157  * Get MMU data tag access register value
158  *
159  * In:
160  *   tagacc, scr1 = scratch registers
161  * Out:
162  *   tagacc = MMU data tag access register value
163  */
164 #define	GET_MMU_D_TAGACC(tagacc, scr1)				\
165 	mov	MMU_TAG_ACCESS, scr1;				\
166 	ldxa	[scr1]ASI_DMMU, tagacc
167 
168 /*
169  * Get MMU data tag target register
170  *
171  * In:
172  *   ttarget, scr1 = scratch registers
173  * Out:
174  *   ttarget = MMU data tag target register value
175  */
176 #define	GET_MMU_D_TTARGET(ttarget, scr1)			\
177 	ldxa	[%g0]ASI_DMMU, ttarget
178 
179 /*
180  * Get MMU data/instruction tag access register values
181  *
182  * In:
183  *   dtagacc, itagacc, scr1, scr2 = scratch registers
184  * Out:
185  *   dtagacc = MMU data tag access register value
186  *   itagacc = MMU instruction tag access register value
187  */
188 #define	GET_MMU_BOTH_TAGACC(dtagacc, itagacc, scr1, scr2)	\
189 	mov	MMU_TAG_ACCESS, scr1;				\
190 	ldxa	[scr1]ASI_DMMU, dtagacc;			\
191 	ldxa	[scr1]ASI_IMMU, itagacc
192 
193 /*
194  * Get MMU data fault address from the tag access register
195  *
196  * In:
197  *   daddr, scr1 = scratch registers
198  * Out:
199  *   daddr = MMU data fault address
200  */
201 #define	GET_MMU_D_ADDR(daddr, scr1)				\
202 	mov	MMU_TAG_ACCESS, scr1;				\
203 	ldxa	[scr1]ASI_DMMU, daddr;				\
204 	set	TAGACC_CTX_MASK, scr1;				\
205 	andn	daddr, scr1, daddr
206 
207 
208 /*
209  * Load ITLB entry
210  *
211  * In:
212  *   tte = reg containing tte
213  *   scr1, scr2, scr3, scr4 = scratch registers (not used)
214  */
215 #define	ITLB_STUFF(tte, scr1, scr2, scr3, scr4)			\
216 	stxa	tte, [%g0]ASI_ITLB_IN
217 
218 /*
219  * Load DTLB entry
220  *
221  * In:
222  *   tte = reg containing tte
223  *   scr1, scr2, scr3, scr4 = scratch register (not used)
224  */
225 #define	DTLB_STUFF(tte, scr1, scr2, scr3, scr4)			\
226 	stxa	tte, [%g0]ASI_DTLB_IN
227 
228 
229 /*
230  * Returns PFN given the TTE and vaddr
231  *
232  * In:
233  *   tte = reg containing tte
234  *   vaddr = reg containing vaddr
235  *   scr1, scr2, scr3 = scratch registers
236  * Out:
237  *   tte = PFN value
238  */
239 #define	TTETOPFN(tte, vaddr, label, scr1, scr2, scr3)			\
240 	srlx	tte, TTE_SZ_SHFT, scr1;					\
241 	and	scr1, TTE_SZ_BITS, scr1;	/* scr1 = tte_size */	\
242 	srlx	tte, TTE_SZ2_SHFT, scr3;				\
243 	and	scr3, TTE_SZ2_BITS, scr3;	/* scr3 = tte_size2 */	\
244 	or	scr1, scr3, scr1;					\
245 	sllx	scr1, 1, scr2;						\
246 	add	scr2, scr1, scr2;		/* mulx 3 */		\
247 	sllx	tte, TTE_PA_LSHIFT, tte;				\
248 	add	scr2, MMU_PAGESHIFT + TTE_PA_LSHIFT, scr3;		\
249 	/* BEGIN CSTYLED */						\
250 	brz,pt	scr2, label/**/1;					\
251 	  srlx	tte, scr3, tte;						\
252 	/* END CSTYLED */						\
253 	sllx	tte, scr2, tte;						\
254 	set	1, scr1;						\
255 	add	scr2, MMU_PAGESHIFT, scr3;				\
256 	sllx	scr1, scr3, scr1;					\
257 	sub	scr1, 1, scr1;		/* g2=TTE_PAGE_OFFSET(ttesz) */	\
258 	and	vaddr, scr1, scr2;					\
259 	srln	scr2, MMU_PAGESHIFT, scr2;				\
260 	or	tte, scr2, tte;						\
261 	/* CSTYLED */							\
262 label/**/1:
263 
264 
265 /*
266  * TTE_SET_REF_ML is a macro that updates the reference bit if it is
267  * not already set. Older sun4u platform use the virtual address to
268  * flush entries from dcache, this is not available here but there are
269  * only two positions in the 64K dcache where the cache line can reside
270  * so we need to flush both of them.
271  *
272  * Parameters:
273  * tte      = reg containing tte
274  * ttepa    = physical pointer to tte
275  * tsbarea  = tsb miss area
276  * tmp1     = tmp reg
277  * tmp2     = tmp reg
278  * label    = temporary label
279  */
280 
281 #define	TTE_SET_REF_ML(tte, ttepa, tsbarea, tmp1, tmp2, label)	\
282 	/* BEGIN CSTYLED */						\
283 	/* check reference bit */					\
284 	andcc	tte, TTE_REF_INT, %g0;					\
285 	bnz,pt	%xcc, label/**/4;	/* if ref bit set-skip ahead */	\
286 	  nop;								\
287 	GET_CPU_IMPL(tmp1);						\
288 	cmp	tmp1, SPITFIRE_IMPL;					\
289 	blt	%icc, label/**/2;	/* skip flush if FJ-OPL cpus */	\
290 	cmp	tmp1, CHEETAH_IMPL;					\
291 	bl,a	%icc, label/**/1;					\
292 	/* update reference bit */					\
293 	lduh	[tsbarea + TSBMISS_DMASK], tmp1;			\
294 	stxa	%g0, [ttepa]ASI_DC_INVAL; /* flush line from dcache */	\
295 	membar	#Sync;							\
296 	ba	label/**/2;						\
297 label/**/1:								\
298 	and	ttepa, tmp1, tmp1;					\
299 	stxa	%g0, [tmp1]ASI_DC_TAG; /* flush line1 from dcache */	\
300 	or	%g0, 1, tmp2;						\
301 	sllx	tmp2, MMU_PAGESHIFT, tmp2;				\
302 	xor	tmp1, tmp2, tmp1;					\
303 	stxa	%g0, [tmp1]ASI_DC_TAG; /* flush line2 from dcache */	\
304 	membar	#Sync;							\
305 label/**/2:								\
306 	or	tte, TTE_REF_INT, tmp1;					\
307 	casxa	[ttepa]ASI_MEM, tte, tmp1; 	/* update ref bit */	\
308 	cmp	tte, tmp1;						\
309 	bne,a,pn %xcc, label/**/2;					\
310 	ldxa	[ttepa]ASI_MEM, tte;	/* MMU_READTTE through pa */	\
311 	or	tte, TTE_REF_INT, tte;					\
312 label/**/4:								\
313 	/* END CSTYLED */
314 
315 
316 /*
317  * TTE_SET_REFMOD_ML is a macro that updates the reference and modify bits
318  * if not already set.
319  *
320  * Parameters:
321  * tte      = reg containing tte
322  * ttepa    = physical pointer to tte
323  * tsbarea  = tsb miss area
324  * tmp1     = tmp reg
325  * tmp2     = tmp reg
326  * label    = temporary label
327  * exitlabel = label where to jump to if write perm bit not set.
328  */
329 
330 #define	TTE_SET_REFMOD_ML(tte, ttepa, tsbarea, tmp1, tmp2, label,	\
331     exitlabel)								\
332 	/* BEGIN CSTYLED */						\
333 	/* check reference bit */					\
334 	andcc	tte, TTE_WRPRM_INT, %g0;				\
335 	bz,pn	%xcc, exitlabel;	/* exit if wr_perm not set */	\
336 	  nop;								\
337 	andcc	tte, TTE_HWWR_INT, %g0;					\
338 	bnz,pn	%xcc, label/**/4;	/* nothing to do */		\
339 	  nop;								\
340 	GET_CPU_IMPL(tmp1);						\
341 	cmp	tmp1, SPITFIRE_IMPL;					\
342 	blt	%icc, label/**/2;	/* skip flush if FJ-OPL cpus */	\
343 	cmp	tmp1, CHEETAH_IMPL;					\
344 	bl,a	%icc, label/**/1;					\
345 	/* update reference bit */					\
346 	lduh	[tsbarea + TSBMISS_DMASK], tmp1;			\
347 	stxa    %g0, [ttepa]ASI_DC_INVAL; /* flush line from dcache */ 	\
348 	membar	#Sync;							\
349 	ba	label/**/2;						\
350 label/**/1:								\
351 	and	ttepa, tmp1, tmp1;					\
352 	stxa	%g0, [tmp1]ASI_DC_TAG; /* flush line1 from dcache */	\
353 	or	%g0, 1, tmp2;						\
354 	sllx	tmp2, MMU_PAGESHIFT, tmp2;				\
355 	xor	tmp1, tmp2, tmp1;					\
356 	stxa	%g0, [tmp1]ASI_DC_TAG; /* flush line2 from dcache */	\
357 	membar	#Sync;							\
358 label/**/2:								\
359 	or	tte, TTE_HWWR_INT | TTE_REF_INT, tmp1;			\
360 	casxa	[ttepa]ASI_MEM, tte, tmp1; /* update ref/mod bit */	\
361 	cmp	tte, tmp1;						\
362 	bne,a,pn %xcc, label/**/2;					\
363 	  ldxa	[ttepa]ASI_MEM, tte;	/* MMU_READTTE through pa */	\
364 	or	tte, TTE_HWWR_INT | TTE_REF_INT, tte;			\
365 label/**/4:								\
366 	/* END CSTYLED */
367 
368 
369 #ifndef UTSB_PHYS
370 
371 /*
372  * Synthesize TSB base register contents for a process with
373  * a single TSB.
374  *
375  * We patch the virtual address mask in at runtime since the
376  * number of significant virtual address bits in the TSB VA
377  * can vary depending upon the TSB slab size being used on the
378  * machine.
379  *
380  * In:
381  *   tsbinfo = TSB info pointer (ro)
382  *   vabase = value of utsb_vabase (ro)
383  * Out:
384  *   tsbreg = value to program into TSB base register
385  */
386 
387 #define	MAKE_TSBREG(tsbreg, tsbinfo, vabase, tmp1, tmp2, label)		\
388 	/* BEGIN CSTYLED */						\
389 	ldx	[tsbinfo + TSBINFO_VADDR], tmp1;			\
390 	.global	label/**/_tsbreg_vamask					;\
391 label/**/_tsbreg_vamask:						\
392 	or	%g0, RUNTIME_PATCH, tsbreg;				\
393 	lduh	[tsbinfo + TSBINFO_SZCODE], tmp2;			\
394 	sllx	tsbreg, TSBREG_VAMASK_SHIFT, tsbreg;			\
395 	or	vabase, tmp2, tmp2;					\
396 	and	tmp1, tsbreg, tsbreg;					\
397 	or	tsbreg, tmp2, tsbreg;					\
398 	/* END CSTYLED */
399 
400 
401 /*
402  * Synthesize TSB base register contents for a process with
403  * two TSBs.  See hat_sfmmu.h for the layout of the TSB base
404  * register in this case.
405  *
406  * In:
407  *   tsb1 = pointer to first TSB info (ro)
408  *   tsb2 = pointer to second TSB info (ro)
409  * Out:
410  *   tsbreg = value to program into TSB base register
411  */
412 #define	MAKE_TSBREG_SECTSB(tsbreg, tsb1, tsb2, tmp1, tmp2, tmp3, label)	\
413 	/* BEGIN CSTYLED */						\
414 	set	TSBREG_MSB_CONST, tmp3					;\
415 	sllx	tmp3, TSBREG_MSB_SHIFT, tsbreg				;\
416 	.global	label/**/_tsbreg_vamask					;\
417 label/**/_tsbreg_vamask:						;\
418 	or	%g0, RUNTIME_PATCH, tmp3				;\
419 	sll	tmp3, TSBREG_VAMASK_SHIFT, tmp3				;\
420 	ldx	[tsb1 + TSBINFO_VADDR], tmp1				;\
421 	ldx	[tsb2 + TSBINFO_VADDR], tmp2				;\
422 	and	tmp1, tmp3, tmp1					;\
423 	and	tmp2, tmp3, tmp2					;\
424 	sllx	tmp2, TSBREG_SECTSB_MKSHIFT, tmp2			;\
425 	or	tmp1, tmp2, tmp3					;\
426 	or	tsbreg, tmp3, tsbreg					;\
427 	lduh	[tsb1 + TSBINFO_SZCODE], tmp1				;\
428 	lduh	[tsb2 + TSBINFO_SZCODE], tmp2				;\
429 	and	tmp1, TSB_SOFTSZ_MASK, tmp1				;\
430 	and	tmp2, TSB_SOFTSZ_MASK, tmp2				;\
431 	sllx	tmp2, TSBREG_SECSZ_SHIFT, tmp2				;\
432 	or	tmp1, tmp2, tmp3					;\
433 	or	tsbreg, tmp3, tsbreg					;\
434 	/* END CSTYLED */
435 
436 
437 /*
438  * Load the locked TSB TLB entry.
439  *
440  * In:
441  *   tsbinfo = tsb_info pointer as va (ro)
442  *   tteidx = shifted index into TLB to load the locked entry (ro)
443  *   va = virtual address at which to load the locked TSB entry (ro)
444  * Out:
445  * Scratch:
446  *   tmp
447  */
448 #define	LOAD_TSBTTE(tsbinfo, tteidx, va, tmp)				\
449 	mov	MMU_TAG_ACCESS, tmp;					\
450 	stxa	va, [tmp]ASI_DMMU;		/* set tag access */	\
451 	membar	#Sync;							\
452 	ldx	[tsbinfo + TSBINFO_TTE], tmp;	/* fetch locked tte */	\
453 	stxa	tmp, [tteidx]ASI_DTLB_ACCESS;	/* load locked tte */	\
454 	membar	#Sync
455 
456 
457 /*
458  * In the current implementation, TSBs usually come from physically
459  * contiguous chunks of memory up to 4MB in size, but 8K TSBs may be
460  * allocated from 8K chunks of memory under certain conditions.  To
461  * prevent aliasing in the virtual address cache when the TSB slab is
462  * 8K in size we must align the reserved (TL>0) TSB virtual address to
463  * have the same low-order bits as the kernel (TL=0) TSB virtual address,
464  * and map 8K TSBs with an 8K TTE.  In cases where the TSB reserved VA
465  * range is smaller than the assumed 4M we will patch the shift at
466  * runtime; otherwise we leave it alone (which is why RUNTIME_PATCH
467  * constant doesn't appear below).
468  *
469  * In:
470  *   tsbinfo (ro)
471  *   resva: reserved VA base for this TSB
472  * Out:
473  *   resva: corrected VA for this TSB
474  */
475 #define	RESV_OFFSET(tsbinfo, resva, tmp1, label)			\
476 	/* BEGIN CSTYLED */						\
477 	lduh	[tsbinfo + TSBINFO_SZCODE], tmp1			;\
478 	brgz,pn	tmp1, label/**/9	 				;\
479 	  nop								;\
480 	ldx	[tsbinfo + TSBINFO_VADDR], tmp1				;\
481 	.global	label/**/_resv_offset					;\
482 label/**/_resv_offset:							;\
483 	sllx	tmp1, (64 - MMU_PAGESHIFT4M), tmp1			;\
484 	srlx	tmp1, (64 - MMU_PAGESHIFT4M), tmp1			;\
485 	or	tmp1, resva, resva					;\
486 label/**/9:								\
487 	/* END CSTYLED */
488 
489 /*
490  * Determine the pointer of the entry in the first TSB to probe given
491  * the 8K TSB pointer register contents.
492  *
493  * In:
494  *   tsbp8k = 8K TSB pointer register (ro)
495  *   tmp = scratch register
496  *   label = label for hot patching of utsb_vabase
497  *
498  * Out: tsbe_ptr = TSB entry address
499  *
500  * Note: This function is patched at runtime for performance reasons.
501  *	 Any changes here require sfmmu_patch_utsb fixed.
502  */
503 
504 #define	GET_1ST_TSBE_PTR(tsbp8k, tsbe_ptr, tmp, label)			\
505 	/* BEGIN CSTYLED */						\
506 label/**/_get_1st_tsbe_ptr:						;\
507 	RUNTIME_PATCH_SETX(tsbe_ptr, tmp)				;\
508 	/* tsbeptr = contents of utsb_vabase */				;\
509 	/* clear upper bits leaving just bits 21:0 of TSB ptr. */	;\
510 	sllx	tsbp8k, TSBREG_FIRTSB_SHIFT, tmp			;\
511 	/* finish clear */						;\
512 	srlx	tmp, TSBREG_FIRTSB_SHIFT, tmp				;\
513 	/* or-in bits 41:22 of the VA to form the real pointer. */	;\
514 	or	tsbe_ptr, tmp, tsbe_ptr					\
515 	/* END CSTYLED */
516 
517 /*
518  * Determine the base address of the second TSB given the 8K TSB
519  * pointer register contents.
520  *
521  * In:
522  *   tsbp8k = 8K TSB pointer register (ro)
523  *   tmp = scratch register
524  *   label = label for hot patching of utsb_vabase
525  *
526  * Out:
527  *   tsbbase = TSB base address
528  *
529  * Note: This function is patched at runtime for performance reasons.
530  *	 Any changes here require sfmmu_patch_utsb fixed.
531  */
532 
533 #define	GET_2ND_TSB_BASE(tsbp8k, tsbbase, tmp, label)			\
534 	/* BEGIN CSTYLED */						\
535 label/**/_get_2nd_tsb_base:						;\
536 	RUNTIME_PATCH_SETX(tsbbase, tmp)				;\
537 	/* tsbbase = contents of utsb4m_vabase */			;\
538 	/* clear upper bits leaving just bits 21:xx of TSB addr. */	;\
539 	sllx	tsbp8k, TSBREG_SECTSB_LSHIFT, tmp			;\
540 	/* clear lower bits leaving just 21:13 in 8:0 */		;\
541 	srlx	tmp, (TSBREG_SECTSB_RSHIFT + MMU_PAGESHIFT), tmp	;\
542 	/* adjust TSB offset to bits 21:13 */				;\
543 	sllx	tmp, MMU_PAGESHIFT, tmp					;\
544 	or	tsbbase, tmp, tsbbase					;\
545 	/* END CSTYLED */
546 
547 /*
548  * Determine the size code of the second TSB given the 8K TSB
549  * pointer register contents.
550  *
551  * In:
552  *   tsbp8k = 8K TSB pointer register (ro)
553  * Out:
554  *   size = TSB size code
555  */
556 
557 #define	GET_2ND_TSB_SIZE(tsbp8k, size)					\
558 	srlx	tsbp8k, TSBREG_SECSZ_SHIFT, size;			\
559 	and	size, TSB_SOFTSZ_MASK, size
560 
561 /*
562  * Get the location in the 2nd TSB of the tsbe for this fault.
563  * Assumes that the second TSB only contains 4M mappings.
564  *
565  * In:
566  *   tagacc = tag access register (clobbered)
567  *   tsbp8k = contents of TSB8K pointer register (ro)
568  *   tmp1, tmp2 = scratch registers
569  *   label = label at which to patch in reserved TSB 4M VA range
570  * Out:
571  *   tsbe_ptr = pointer to the tsbe in the 2nd TSB
572  */
573 #define	GET_2ND_TSBE_PTR(tagacc, tsbp8k, tsbe_ptr, tmp1, tmp2, label)	\
574 	GET_2ND_TSB_BASE(tsbp8k, tsbe_ptr, tmp2, label);		\
575 	/* tsbe_ptr = TSB base address, tmp2 = junk */			\
576 	GET_2ND_TSB_SIZE(tsbp8k, tmp1);					\
577 	/* tmp1 = TSB size code */					\
578 	GET_TSBE_POINTER(MMU_PAGESHIFT4M, tsbe_ptr, tagacc, tmp1, tmp2)
579 
580 
581 #else /* !UTSB_PHYS */
582 
583 
584 /*
585  * Determine the pointer of the entry in the first TSB to probe given
586  * the 8K TSB pointer register contents.
587  *
588  * In:
589  *   tagacc = tag access register
590  *   tsbe_ptr = 8K TSB pointer register
591  *   tmp = scratch registers
592  *
593  * Out: tsbe_ptr = TSB entry address
594  *
595  * Note: This macro is a nop since the 8K TSB pointer register
596  *	 is the entry pointer and does not need to be decoded.
597  *	 It is defined to allow for code sharing with sun4v.
598  */
599 
600 #define	GET_1ST_TSBE_PTR(tagacc, tsbe_ptr, tmp1, tmp2)
601 
602 #endif /* !UTSB_PHYS */
603 
604 
605 /*
606  * Load TSB base register.  In the single TSB case this register
607  * contains utsb_vabase, bits 21:13 of tsbinfo->tsb_va, and the
608  * TSB size code in bits 2:0.  See hat_sfmmu.h for the layout in
609  * the case where we have multiple TSBs per process.
610  *
611  * In:
612  *   tsbreg = value to load (ro)
613  */
614 #define	LOAD_TSBREG(tsbreg, tmp1, tmp2)					\
615 	mov	MMU_TSB, tmp1;						\
616 	sethi	%hi(FLUSH_ADDR), tmp2;					\
617 	stxa	tsbreg, [tmp1]ASI_DMMU;		/* dtsb reg */		\
618 	stxa	tsbreg, [tmp1]ASI_IMMU;		/* itsb reg */		\
619 	flush	tmp2
620 
621 #ifdef UTSB_PHYS
622 #define	UTSB_PROBE_ASI	ASI_QUAD_LDD_PHYS
623 #else
624 #define	UTSB_PROBE_ASI	ASI_NQUAD_LD
625 #endif
626 #define	PROBE_TSB(tsbe_ptr, tag, tsbtag, label)                            \
627 	/* BEGIN CSTYLED */                                             \
628         ldda    [tsbe_ptr]UTSB_PROBE_ASI, tsbtag                        ;\
629         cmp     tsbtag, tag             /* compare tag w/ TSB */        ;\
630         bne,pn  %xcc, label/**/1        /* branch if !match */          ;\
631           nop                                                           \
632 	/* END CSTYLED */
633 /*
634  * Probe a TSB. If miss continue from the end of the macro for most probes
635  * except jump to TSB miss for 3rd ITSB probe. If hit retry faulted
636  * instruction for DTSB probes. For ITSB probes in case of TSB hit check
637  * execute bit and branch to exec_fault if the bit is not set otherwise retry
638  * faulted instruction. Do ITLB synthesis in case of hit in second ITSB if
639  * synthesis bit is set.
640  *
641  * tsbe_ptr = precomputed TSB entry pointer (in, ro)
642  * vpg_4m = 4M virtual page number for tag matching  (in, ro)
643  * label = where to branch to if this is a miss (text)
644  *
645  * For trapstat, we have to explicily use these registers.
646  * g4 = location tag will be retrieved into from TSB (out)
647  * g5 = location data(tte) will be retrieved into from TSB (out)
648  *
649  * In case of first tsb probe tsbe_ptr is %g1. For other tsb probes
650  * move tsbe_ptr into %g1 in case of hit for traptrace.
651  *
652  * If the probe fails and we continue from call site %g4-%g5 are clobbered.
653  * 2nd ITSB probe macro will also clobber %g6 in this case.
654  */
655 #define	PROBE_1ST_DTSB(tsbe_ptr, vpg_4m, label)                         \
656 	/* BEGIN CSTYLED */                                             \
657         PROBE_TSB(tsbe_ptr, vpg_4m, %g4, label)                         ;\
658         TT_TRACE(trace_tsbhit)                                          ;\
659         DTLB_STUFF(%g5, %g1, %g2, %g3, %g4)                             ;\
660         retry                      /* retry faulted instruction */      ;\
661 label/**/1:                                                             \
662 	/* END CSTYLED */
663 
664 #define	PROBE_2ND_DTSB(tsbe_ptr, vpg_4m, label)                         \
665 	/* BEGIN CSTYLED */                                             \
666         PROBE_TSB(tsbe_ptr, vpg_4m, %g4, label)                         ;\
667         mov     tsbe_ptr, %g1       /* trace_tsbhit wants ptr in %g1 */ ;\
668         TT_TRACE(trace_tsbhit)                                          ;\
669         DTLB_STUFF(%g5, %g1, %g2, %g3, %g4)                             ;\
670         retry                      /* retry faulted instruction */      ;\
671 label/**/1:                                                             \
672 	/* END CSTYLED */
673 
674 #define	PROBE_1ST_ITSB(tsbe_ptr, vpg_4m, label)                         \
675 	/* BEGIN CSTYLED */                                             \
676         PROBE_TSB(tsbe_ptr, vpg_4m, %g4, label)                         ;\
677         andcc   %g5, TTE_EXECPRM_INT, %g0  /* check execute bit */      ;\
678         bz,pn   %icc, exec_fault                                        ;\
679           nop                                                           ;\
680         TT_TRACE(trace_tsbhit)                                          ;\
681         ITLB_STUFF(%g5, %g1, %g2, %g3, %g4)                             ;\
682         retry                           /* retry faulted instruction */ ;\
683 label/**/1:                                                             \
684 	/* END CSTYLED */
685 
686 #define	PROBE_2ND_ITSB(tsbe_ptr, vpg_4m, label)                         \
687 	/* BEGIN CSTYLED */                                             \
688         ldda    [tsbe_ptr]UTSB_PROBE_ASI, %g4 /* g4 = tag, g5 = data */ ;\
689         cmp     %g4, vpg_4m             /* compare tag w/ TSB */        ;\
690         bne,pn  %xcc, label/**/2        /* branch if !match */          ;\
691           or    %g0, TTE4M, %g6                                         ;\
692         andcc   %g5, TTE_EXECPRM_INT, %g0  /* check execute bit */      ;\
693         bz,a,pn %icc, label/**/1                                        ;\
694           sllx  %g6, TTE_SZ_SHFT, %g6                                   ;\
695         mov     tsbe_ptr, %g1         /* trap trace wants ptr in %g1 */ ;\
696         TT_TRACE(trace_tsbhit)                                          ;\
697         ITLB_STUFF(%g5, %g1, %g2, %g3, %g4)                             ;\
698         retry                        /* retry faulted instruction */    ;\
699 label/**/1:                                                             ;\
700         andcc %g5, TTE_E_SYNTH_INT, %g0                                 ;\
701         bz,pn   %icc, exec_fault                                        ;\
702           mov   tsbe_ptr, %g1       /* trap trace wants ptr in %g1 */   ;\
703         or      %g5, %g6, %g5                                           ;\
704         TT_TRACE(trace_tsbhit)                                          ;\
705         ITLB_STUFF(%g5, %g1, %g2, %g3, %g4)                             ;\
706         retry                      /* retry faulted instruction */      ;\
707 label/**/2:
708 	/* END CSTYLED */
709 
710 #ifdef UTSB_PHYS
711 
712 /*
713  * Updates the context filed in the tagaccess register with the shared
714  * context to force the next i/DTLB_STUFF() to load this mapping into
715  * the TLB with the shared context.
716  */
717 #define	SET_SHCTX_TAGACC(tmp1, tmp2, asi)                               \
718 	/* BEGIN CSTYLED */                                             \
719         mov     MMU_TAG_ACCESS, tmp2                                    ;\
720         ldxa    [tmp2]asi, tmp2                 /* tmp2 = VA|CTX */     ;\
721         srlx    tmp2, TAGACC_SHIFT, tmp2                                ;\
722         sllx    tmp2, TAGACC_SHIFT, tmp2        /* tmp2 = VA */         ;\
723         mov     MMU_SHARED_CONTEXT, tmp1        /* clobber tsbe_ptr */  ;\
724         ldxa    [tmp1]ASI_MMU_CTX, tmp1         /* tmp2 = shctx reg */  ;\
725         sllx    tmp1, SHCTXREG_CTX_LSHIFT, tmp1                         ;\
726         srlx    tmp1, SHCTXREG_CTX_LSHIFT, tmp1 /* tmp1 = SHCTX */      ;\
727         or      tmp1, tmp2, tmp1                /* tmp1  = VA|SHCTX */  ;\
728         mov     MMU_TAG_ACCESS, tmp2                                    ;\
729         stxa    tmp1, [tmp2]asi                 /* asi = VA|SHCTX */
730 	/* END CSTYLED */
731 
732 #define	PROBE_SHCTX_DTSB(tsbe_ptr, vpg_4m, label)                       \
733 	/* BEGIN CSTYLED */                                             \
734         PROBE_TSB(tsbe_ptr, vpg_4m, %g4, label)                         ;\
735         mov     tsbe_ptr, %g1       /* trace_tsbhit wants ptr in %g1 */ ;\
736         TT_TRACE(trace_tsbhit)                                          ;\
737         SET_SHCTX_TAGACC(%g3, %g4, ASI_DMMU)                            ;\
738         DTLB_STUFF(%g5, %g1, %g2, %g3, %g4)                             ;\
739         retry                      /* retry faulted instruction */      ;\
740 label/**/1:                                                             \
741 	/* END CSTYLED */
742 
743 #define	PROBE_3RD_DTSB(tsbe_ptr, vpg_4m, label)                         \
744 	/* BEGIN CSTYLED */                                             \
745         PROBE_SHCTX_DTSB(tsbe_ptr, vpg_4m, label)                  ;\
746 	/* END CSTYLED */
747 
748 #define	PROBE_4TH_DTSB(tsbe_ptr, vpg_4m, label)                         \
749 	/* BEGIN CSTYLED */                                             \
750         PROBE_SHCTX_DTSB(tsbe_ptr, vpg_4m, label)                  ;\
751 	/* END CSTYLED */
752 
753 #define	PROBE_SHCTX_ITSB(tsbe_ptr, vpg_4m, label)                       \
754 	/* BEGIN CSTYLED */                                             \
755         PROBE_TSB(tsbe_ptr, vpg_4m, %g4, label)                         ;\
756         andcc   %g5, TTE_EXECPRM_INT, %g0  /* check execute bit */      ;\
757         bz,pn %icc, exec_fault                                          ;\
758          mov     tsbe_ptr, %g1          /* for traptrace sake */        ;\
759         TT_TRACE(trace_tsbhit)                                          ;\
760         SET_SHCTX_TAGACC(%g3, %g4, ASI_IMMU)                            ;\
761         ITLB_STUFF(%g5, %g1, %g2, %g3, %g4)                             ;\
762         retry                           /* retry faulted instruction */ ;\
763 label/**/1:
764 	/* END CSTYLED */
765 
766 #define	PROBE_3RD_ITSB(tsbe_ptr, vpg_4m, label)                         \
767 	/* BEGIN CSTYLED */                                             \
768         PROBE_SHCTX_ITSB(tsbe_ptr, vpg_4m, sfmmu_tsb_miss_tt)      ;\
769 	/* END CSTYLED */
770 
771 #define	PROBE_4TH_ITSB(tsbe_ptr, vpg_4m, label)                         \
772 	/* BEGIN CSTYLED */                                             \
773         PROBE_SHCTX_ITSB(tsbe_ptr, vpg_4m, label)                  ;\
774 	/* END CSTYLED */
775 
776 /*
777  * The traptype is supplied by caller.
778  *
779  * If iTSB miss, store shctx into IMMU TAG ACCESS REG
780  * If dTSB miss, store shctx into DMMU TAG ACCESS REG
781  * Thus the [D|I]TLB_STUFF will work as expected.
782  */
783 #define	SAVE_CTX1(traptype, tmp1, tmp2, label)                          \
784 	/* BEGIN CSTYLED */                                             \
785         cmp     traptype, FAST_IMMU_MISS_TT                             ;\
786         be,pn %icc, label/**/1                                          ;\
787           nop                                                           ;\
788         SET_SHCTX_TAGACC(tmp1, tmp2, ASI_DMMU)                          ;\
789         membar  #Sync                                                   ;\
790         ba,a    label/**/2                                              ;\
791 label/**/1:                                                             ;\
792         SET_SHCTX_TAGACC(tmp1, tmp2, ASI_IMMU)                          ;\
793         sethi   %hi(FLUSH_ADDR), tmp1                                   ;\
794         flush   tmp1                                                    ;\
795 label/**/2:
796 	/* END CSTYLED */
797 
798 #endif /* UTSB_PHYS */
799 
800 #endif /* _ASM */
801 
802 #ifdef	__cplusplus
803 }
804 #endif
805 
806 #endif	/* _VM_MACH_SFMMU_H */
807