2 * PARISC TLB and cache flushing support
3 * Copyright (C) 2000-2001 Hewlett-Packard (John Marvin)
4 * Copyright (C) 2001 Matthew Wilcox (willy at parisc-linux.org)
5 * Copyright (C) 2002 Richard Hirst (rhirst with parisc-linux.org)
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * NOTE: fdc,fic, and pdc instructions that use base register modification
24 * should only use index and base registers that are not shadowed,
25 * so that the fast path emulation in the non access miss handler
36 #include <asm/assembly.h>
37 #include <asm/pgtable.h>
38 #include <asm/cache.h>
40 #include <linux/linkage.h>
41 #include <linux/init.h>
46 ENTRY_CFI(flush_tlb_all_local)
52 * The pitlbe and pdtlbe instructions should only be used to
53 * flush the entire tlb. Also, there needs to be no intervening
54 * tlb operations, e.g. tlb misses, so the operation needs
55 * to happen in real mode with all interruptions disabled.
58 /* pcxt_ssm_bug - relied upon translation! PA 2.0 Arch. F-4 and F-5 */
59 rsm PSW_SM_I, %r19 /* save I-bit state */
67 rsm PSW_SM_Q, %r0 /* prep to load iia queue */
68 mtctl %r0, %cr17 /* Clear IIASQ tail */
69 mtctl %r0, %cr17 /* Clear IIASQ head */
70 mtctl %r1, %cr18 /* IIAOQ head */
72 mtctl %r1, %cr18 /* IIAOQ tail */
73 load32 REAL_MODE_PSW, %r1
78 1: load32 PA(cache_info), %r1
80 /* Flush Instruction Tlb */
82 LDREG ITLB_SID_BASE(%r1), %r20
83 LDREG ITLB_SID_STRIDE(%r1), %r21
84 LDREG ITLB_SID_COUNT(%r1), %r22
85 LDREG ITLB_OFF_BASE(%r1), %arg0
86 LDREG ITLB_OFF_STRIDE(%r1), %arg1
87 LDREG ITLB_OFF_COUNT(%r1), %arg2
88 LDREG ITLB_LOOP(%r1), %arg3
90 addib,COND(=) -1, %arg3, fitoneloop /* Preadjust and test */
91 movb,<,n %arg3, %r31, fitdone /* If loop < 0, skip */
92 copy %arg0, %r28 /* Init base addr */
94 fitmanyloop: /* Loop if LOOP >= 2 */
96 add %r21, %r20, %r20 /* increment space */
97 copy %arg2, %r29 /* Init middle loop count */
99 fitmanymiddle: /* Loop if LOOP >= 2 */
100 addib,COND(>) -1, %r31, fitmanymiddle /* Adjusted inner loop decr */
101 pitlbe %r0(%sr1, %r28)
102 pitlbe,m %arg1(%sr1, %r28) /* Last pitlbe and addr adjust */
103 addib,COND(>) -1, %r29, fitmanymiddle /* Middle loop decr */
104 copy %arg3, %r31 /* Re-init inner loop count */
106 movb,tr %arg0, %r28, fitmanyloop /* Re-init base addr */
107 addib,COND(<=),n -1, %r22, fitdone /* Outer loop count decr */
109 fitoneloop: /* Loop if LOOP = 1 */
111 copy %arg0, %r28 /* init base addr */
112 copy %arg2, %r29 /* init middle loop count */
114 fitonemiddle: /* Loop if LOOP = 1 */
115 addib,COND(>) -1, %r29, fitonemiddle /* Middle loop count decr */
116 pitlbe,m %arg1(%sr1, %r28) /* pitlbe for one loop */
118 addib,COND(>) -1, %r22, fitoneloop /* Outer loop count decr */
119 add %r21, %r20, %r20 /* increment space */
125 LDREG DTLB_SID_BASE(%r1), %r20
126 LDREG DTLB_SID_STRIDE(%r1), %r21
127 LDREG DTLB_SID_COUNT(%r1), %r22
128 LDREG DTLB_OFF_BASE(%r1), %arg0
129 LDREG DTLB_OFF_STRIDE(%r1), %arg1
130 LDREG DTLB_OFF_COUNT(%r1), %arg2
131 LDREG DTLB_LOOP(%r1), %arg3
133 addib,COND(=) -1, %arg3, fdtoneloop /* Preadjust and test */
134 movb,<,n %arg3, %r31, fdtdone /* If loop < 0, skip */
135 copy %arg0, %r28 /* Init base addr */
137 fdtmanyloop: /* Loop if LOOP >= 2 */
139 add %r21, %r20, %r20 /* increment space */
140 copy %arg2, %r29 /* Init middle loop count */
142 fdtmanymiddle: /* Loop if LOOP >= 2 */
143 addib,COND(>) -1, %r31, fdtmanymiddle /* Adjusted inner loop decr */
144 pdtlbe %r0(%sr1, %r28)
145 pdtlbe,m %arg1(%sr1, %r28) /* Last pdtlbe and addr adjust */
146 addib,COND(>) -1, %r29, fdtmanymiddle /* Middle loop decr */
147 copy %arg3, %r31 /* Re-init inner loop count */
149 movb,tr %arg0, %r28, fdtmanyloop /* Re-init base addr */
150 addib,COND(<=),n -1, %r22,fdtdone /* Outer loop count decr */
152 fdtoneloop: /* Loop if LOOP = 1 */
154 copy %arg0, %r28 /* init base addr */
155 copy %arg2, %r29 /* init middle loop count */
157 fdtonemiddle: /* Loop if LOOP = 1 */
158 addib,COND(>) -1, %r29, fdtonemiddle /* Middle loop count decr */
159 pdtlbe,m %arg1(%sr1, %r28) /* pdtlbe for one loop */
161 addib,COND(>) -1, %r22, fdtoneloop /* Outer loop count decr */
162 add %r21, %r20, %r20 /* increment space */
167 * Switch back to virtual mode
178 rsm PSW_SM_Q, %r0 /* prep to load iia queue */
179 mtctl %r0, %cr17 /* Clear IIASQ tail */
180 mtctl %r0, %cr17 /* Clear IIASQ head */
181 mtctl %r1, %cr18 /* IIAOQ head */
183 mtctl %r1, %cr18 /* IIAOQ tail */
184 load32 KERNEL_PSW, %r1
185 or %r1, %r19, %r1 /* I-bit to state on entry */
186 mtctl %r1, %ipsw /* restore I-bit (entire PSW) */
195 ENDPROC_CFI(flush_tlb_all_local)
197 .import cache_info,data
199 ENTRY_CFI(flush_instruction_cache_local)
204 load32 cache_info, %r1
206 /* Flush Instruction Cache */
208 LDREG ICACHE_BASE(%r1), %arg0
209 LDREG ICACHE_STRIDE(%r1), %arg1
210 LDREG ICACHE_COUNT(%r1), %arg2
211 LDREG ICACHE_LOOP(%r1), %arg3
212 rsm PSW_SM_I, %r22 /* No mmgt ops during loop*/
214 addib,COND(=) -1, %arg3, fioneloop /* Preadjust and test */
215 movb,<,n %arg3, %r31, fisync /* If loop < 0, do sync */
217 fimanyloop: /* Loop if LOOP >= 2 */
218 addib,COND(>) -1, %r31, fimanyloop /* Adjusted inner loop decr */
219 fice %r0(%sr1, %arg0)
220 fice,m %arg1(%sr1, %arg0) /* Last fice and addr adjust */
221 movb,tr %arg3, %r31, fimanyloop /* Re-init inner loop count */
222 addib,COND(<=),n -1, %arg2, fisync /* Outer loop decr */
224 fioneloop: /* Loop if LOOP = 1 */
225 /* Some implementations may flush with a single fice instruction */
226 cmpib,COND(>>=),n 15, %arg2, fioneloop2
229 fice,m %arg1(%sr1, %arg0)
230 fice,m %arg1(%sr1, %arg0)
231 fice,m %arg1(%sr1, %arg0)
232 fice,m %arg1(%sr1, %arg0)
233 fice,m %arg1(%sr1, %arg0)
234 fice,m %arg1(%sr1, %arg0)
235 fice,m %arg1(%sr1, %arg0)
236 fice,m %arg1(%sr1, %arg0)
237 fice,m %arg1(%sr1, %arg0)
238 fice,m %arg1(%sr1, %arg0)
239 fice,m %arg1(%sr1, %arg0)
240 fice,m %arg1(%sr1, %arg0)
241 fice,m %arg1(%sr1, %arg0)
242 fice,m %arg1(%sr1, %arg0)
243 fice,m %arg1(%sr1, %arg0)
244 addib,COND(>) -16, %arg2, fioneloop1
245 fice,m %arg1(%sr1, %arg0)
248 cmpb,COND(=),n %arg2, %r0, fisync /* Predict branch taken */
251 addib,COND(>) -1, %arg2, fioneloop2 /* Outer loop count decr */
252 fice,m %arg1(%sr1, %arg0) /* Fice for one loop */
256 mtsm %r22 /* restore I-bit */
262 ENDPROC_CFI(flush_instruction_cache_local)
265 .import cache_info, data
266 ENTRY_CFI(flush_data_cache_local)
271 load32 cache_info, %r1
273 /* Flush Data Cache */
275 LDREG DCACHE_BASE(%r1), %arg0
276 LDREG DCACHE_STRIDE(%r1), %arg1
277 LDREG DCACHE_COUNT(%r1), %arg2
278 LDREG DCACHE_LOOP(%r1), %arg3
279 rsm PSW_SM_I, %r22 /* No mmgt ops during loop*/
281 addib,COND(=) -1, %arg3, fdoneloop /* Preadjust and test */
282 movb,<,n %arg3, %r31, fdsync /* If loop < 0, do sync */
284 fdmanyloop: /* Loop if LOOP >= 2 */
285 addib,COND(>) -1, %r31, fdmanyloop /* Adjusted inner loop decr */
286 fdce %r0(%sr1, %arg0)
287 fdce,m %arg1(%sr1, %arg0) /* Last fdce and addr adjust */
288 movb,tr %arg3, %r31, fdmanyloop /* Re-init inner loop count */
289 addib,COND(<=),n -1, %arg2, fdsync /* Outer loop decr */
291 fdoneloop: /* Loop if LOOP = 1 */
292 /* Some implementations may flush with a single fdce instruction */
293 cmpib,COND(>>=),n 15, %arg2, fdoneloop2
296 fdce,m %arg1(%sr1, %arg0)
297 fdce,m %arg1(%sr1, %arg0)
298 fdce,m %arg1(%sr1, %arg0)
299 fdce,m %arg1(%sr1, %arg0)
300 fdce,m %arg1(%sr1, %arg0)
301 fdce,m %arg1(%sr1, %arg0)
302 fdce,m %arg1(%sr1, %arg0)
303 fdce,m %arg1(%sr1, %arg0)
304 fdce,m %arg1(%sr1, %arg0)
305 fdce,m %arg1(%sr1, %arg0)
306 fdce,m %arg1(%sr1, %arg0)
307 fdce,m %arg1(%sr1, %arg0)
308 fdce,m %arg1(%sr1, %arg0)
309 fdce,m %arg1(%sr1, %arg0)
310 fdce,m %arg1(%sr1, %arg0)
311 addib,COND(>) -16, %arg2, fdoneloop1
312 fdce,m %arg1(%sr1, %arg0)
315 cmpb,COND(=),n %arg2, %r0, fdsync /* Predict branch taken */
318 addib,COND(>) -1, %arg2, fdoneloop2 /* Outer loop count decr */
319 fdce,m %arg1(%sr1, %arg0) /* Fdce for one loop */
324 mtsm %r22 /* restore I-bit */
330 ENDPROC_CFI(flush_data_cache_local)
332 /* Macros to serialize TLB purge operations on SMP. */
334 .macro tlb_lock la,flags,tmp
336 #if __PA_LDCW_ALIGNMENT > 4
337 load32 pa_tlb_lock + __PA_LDCW_ALIGNMENT-1, \la
338 depi 0,31,__PA_LDCW_ALIGN_ORDER, \la
340 load32 pa_tlb_lock, \la
353 .macro tlb_unlock la,flags,tmp
362 /* Clear page using kernel mapping. */
364 ENTRY_CFI(clear_page_asm)
371 /* Unroll the loop. */
372 ldi (PAGE_SIZE / 128), %r1
392 /* Note reverse branch hint for addib is taken. */
393 addib,COND(>),n -1, %r1, 1b
399 * Note that until (if) we start saving the full 64-bit register
400 * values on interrupt, we can't use std on a 32 bit kernel.
402 ldi (PAGE_SIZE / 64), %r1
422 addib,COND(>),n -1, %r1, 1b
430 ENDPROC_CFI(clear_page_asm)
432 /* Copy page using kernel mapping. */
434 ENTRY_CFI(copy_page_asm)
440 /* PA8x00 CPUs can consume 2 loads or 1 store per cycle.
441 * Unroll the loop by hand and arrange insn appropriately.
442 * Prefetch doesn't improve performance on rp3440.
443 * GCC probably can do this just as well...
446 ldi (PAGE_SIZE / 128), %r1
490 /* Note reverse branch hint for addib is taken. */
491 addib,COND(>),n -1, %r1, 1b
497 * This loop is optimized for PCXL/PCXL2 ldw/ldw and stw/stw
498 * bundles (very restricted rules for bundling).
499 * Note that until (if) we start saving
500 * the full 64 bit register values on interrupt, we can't
501 * use ldd/std on a 32 bit kernel.
504 ldi (PAGE_SIZE / 64), %r1
540 addib,COND(>),n -1, %r1, 1b
548 ENDPROC_CFI(copy_page_asm)
551 * NOTE: Code in clear_user_page has a hard coded dependency on the
552 * maximum alias boundary being 4 Mb. We've been assured by the
553 * parisc chip designers that there will not ever be a parisc
554 * chip with a larger alias boundary (Never say never :-) ).
556 * Subtle: the dtlb miss handlers support the temp alias region by
557 * "knowing" that if a dtlb miss happens within the temp alias
558 * region it must have occurred while in clear_user_page. Since
559 * this routine makes use of processor local translations, we
560 * don't want to insert them into the kernel page table. Instead,
561 * we load up some general registers (they need to be registers
562 * which aren't shadowed) with the physical page numbers (preshifted
563 * for tlb insertion) needed to insert the translations. When we
564 * miss on the translation, the dtlb miss handler inserts the
565 * translation into the tlb using these values:
567 * %r26 physical page (shifted for tlb insert) of "to" translation
568 * %r23 physical page (shifted for tlb insert) of "from" translation
571 /* Drop prot bits and convert to page addr for iitlbt and idtlbt */
572 #define PAGE_ADD_SHIFT (PAGE_SHIFT-12)
573 .macro convert_phys_for_tlb_insert20 phys
574 extrd,u \phys, 56-PAGE_ADD_SHIFT, 32-PAGE_ADD_SHIFT, \phys
575 #if _PAGE_SIZE_ENCODING_DEFAULT
576 depdi _PAGE_SIZE_ENCODING_DEFAULT, 63, (63-58), \phys
581 * copy_user_page_asm() performs a page copy using mappings
582 * equivalent to the user page mappings. It can be used to
583 * implement copy_user_page() but unfortunately both the `from'
584 * and `to' pages need to be flushed through mappings equivalent
585 * to the user mappings after the copy because the kernel accesses
586 * the `from' page through the kmap kernel mapping and the `to'
587 * page needs to be flushed since code can be copied. As a
588 * result, this implementation is less efficient than the simpler
589 * copy using the kernel mapping. It only needs the `from' page
590 * to flushed via the user mapping. The kunmap routines handle
591 * the flushes needed for the kernel mapping.
593 * I'm still keeping this around because it may be possible to
594 * use it if more information is passed into copy_user_page().
595 * Have to do some measurements to see if it is worthwhile to
596 * lobby for such a change.
600 ENTRY_CFI(copy_user_page_asm)
605 /* Convert virtual `to' and `from' addresses to physical addresses.
606 Move `from' physical address to non shadowed register. */
607 ldil L%(__PAGE_OFFSET), %r1
611 ldil L%(TMPALIAS_MAP_START), %r28
613 #if (TMPALIAS_MAP_START >= 0x80000000)
614 depdi 0, 31,32, %r28 /* clear any sign extension */
616 convert_phys_for_tlb_insert20 %r26 /* convert phys addr to tlb insert format */
617 convert_phys_for_tlb_insert20 %r23 /* convert phys addr to tlb insert format */
618 depd %r24,63,22, %r28 /* Form aliased virtual address 'to' */
619 depdi 0, 63,PAGE_SHIFT, %r28 /* Clear any offset bits */
621 depdi 1, 41,1, %r29 /* Form aliased virtual address 'from' */
623 extrw,u %r26, 24,25, %r26 /* convert phys addr to tlb insert format */
624 extrw,u %r23, 24,25, %r23 /* convert phys addr to tlb insert format */
625 depw %r24, 31,22, %r28 /* Form aliased virtual address 'to' */
626 depwi 0, 31,PAGE_SHIFT, %r28 /* Clear any offset bits */
628 depwi 1, 9,1, %r29 /* Form aliased virtual address 'from' */
631 /* Purge any old translations */
637 tlb_lock %r20,%r21,%r22
640 tlb_unlock %r20,%r21,%r22
644 /* PA8x00 CPUs can consume 2 loads or 1 store per cycle.
645 * Unroll the loop by hand and arrange insn appropriately.
646 * GCC probably can do this just as well.
650 ldi (PAGE_SIZE / 128), %r1
694 /* conditional branches nullify on forward taken branch, and on
695 * non-taken backward branch. Note that .+4 is a backwards branch.
696 * The ldd should only get executed if the branch is taken.
698 addib,COND(>),n -1, %r1, 1b /* bundle 10 */
699 ldd 0(%r29), %r19 /* start next loads */
702 ldi (PAGE_SIZE / 64), %r1
705 * This loop is optimized for PCXL/PCXL2 ldw/ldw and stw/stw
706 * bundles (very restricted rules for bundling). It probably
707 * does OK on PCXU and better, but we could do better with
708 * ldd/std instructions. Note that until (if) we start saving
709 * the full 64 bit register values on interrupt, we can't
710 * use ldd/std on a 32 bit kernel.
747 addib,COND(>) -1, %r1,1b
756 ENDPROC_CFI(copy_user_page_asm)
758 ENTRY_CFI(clear_user_page_asm)
765 ldil L%(TMPALIAS_MAP_START), %r28
767 #if (TMPALIAS_MAP_START >= 0x80000000)
768 depdi 0, 31,32, %r28 /* clear any sign extension */
770 convert_phys_for_tlb_insert20 %r26 /* convert phys addr to tlb insert format */
771 depd %r25, 63,22, %r28 /* Form aliased virtual address 'to' */
772 depdi 0, 63,PAGE_SHIFT, %r28 /* Clear any offset bits */
774 extrw,u %r26, 24,25, %r26 /* convert phys addr to tlb insert format */
775 depw %r25, 31,22, %r28 /* Form aliased virtual address 'to' */
776 depwi 0, 31,PAGE_SHIFT, %r28 /* Clear any offset bits */
779 /* Purge any old translation */
784 tlb_lock %r20,%r21,%r22
786 tlb_unlock %r20,%r21,%r22
790 ldi (PAGE_SIZE / 128), %r1
792 /* PREFETCH (Write) has not (yet) been proven to help here */
793 /* #define PREFETCHW_OP ldd 256(%0), %r0 */
811 addib,COND(>) -1, %r1, 1b
814 #else /* ! CONFIG_64BIT */
815 ldi (PAGE_SIZE / 64), %r1
833 addib,COND(>) -1, %r1, 1b
835 #endif /* CONFIG_64BIT */
842 ENDPROC_CFI(clear_user_page_asm)
844 ENTRY_CFI(flush_dcache_page_asm)
849 ldil L%(TMPALIAS_MAP_START), %r28
851 #if (TMPALIAS_MAP_START >= 0x80000000)
852 depdi 0, 31,32, %r28 /* clear any sign extension */
854 convert_phys_for_tlb_insert20 %r26 /* convert phys addr to tlb insert format */
855 depd %r25, 63,22, %r28 /* Form aliased virtual address 'to' */
856 depdi 0, 63,PAGE_SHIFT, %r28 /* Clear any offset bits */
858 extrw,u %r26, 24,25, %r26 /* convert phys addr to tlb insert format */
859 depw %r25, 31,22, %r28 /* Form aliased virtual address 'to' */
860 depwi 0, 31,PAGE_SHIFT, %r28 /* Clear any offset bits */
863 /* Purge any old translation */
868 tlb_lock %r20,%r21,%r22
870 tlb_unlock %r20,%r21,%r22
873 ldil L%dcache_stride, %r1
874 ldw R%dcache_stride(%r1), r31
877 depdi,z 1, 63-PAGE_SHIFT,1, %r25
879 depwi,z 1, 31-PAGE_SHIFT,1, %r25
900 cmpb,COND(<<) %r28, %r25,1b
909 ENDPROC_CFI(flush_dcache_page_asm)
911 ENTRY_CFI(flush_icache_page_asm)
916 ldil L%(TMPALIAS_MAP_START), %r28
918 #if (TMPALIAS_MAP_START >= 0x80000000)
919 depdi 0, 31,32, %r28 /* clear any sign extension */
921 convert_phys_for_tlb_insert20 %r26 /* convert phys addr to tlb insert format */
922 depd %r25, 63,22, %r28 /* Form aliased virtual address 'to' */
923 depdi 0, 63,PAGE_SHIFT, %r28 /* Clear any offset bits */
925 extrw,u %r26, 24,25, %r26 /* convert phys addr to tlb insert format */
926 depw %r25, 31,22, %r28 /* Form aliased virtual address 'to' */
927 depwi 0, 31,PAGE_SHIFT, %r28 /* Clear any offset bits */
930 /* Purge any old translation. Note that the FIC instruction
931 * may use either the instruction or data TLB. Given that we
932 * have a flat address space, it's not clear which TLB will be
933 * used. So, we purge both entries. */
937 pitlb,l %r0(%sr4,%r28)
939 tlb_lock %r20,%r21,%r22
942 tlb_unlock %r20,%r21,%r22
945 ldil L%icache_stride, %r1
946 ldw R%icache_stride(%r1), %r31
949 depdi,z 1, 63-PAGE_SHIFT,1, %r25
951 depwi,z 1, 31-PAGE_SHIFT,1, %r25
957 /* fic only has the type 26 form on PA1.1, requiring an
958 * explicit space specification, so use %sr4 */
959 1: fic,m %r31(%sr4,%r28)
960 fic,m %r31(%sr4,%r28)
961 fic,m %r31(%sr4,%r28)
962 fic,m %r31(%sr4,%r28)
963 fic,m %r31(%sr4,%r28)
964 fic,m %r31(%sr4,%r28)
965 fic,m %r31(%sr4,%r28)
966 fic,m %r31(%sr4,%r28)
967 fic,m %r31(%sr4,%r28)
968 fic,m %r31(%sr4,%r28)
969 fic,m %r31(%sr4,%r28)
970 fic,m %r31(%sr4,%r28)
971 fic,m %r31(%sr4,%r28)
972 fic,m %r31(%sr4,%r28)
973 fic,m %r31(%sr4,%r28)
974 cmpb,COND(<<) %r28, %r25,1b
975 fic,m %r31(%sr4,%r28)
983 ENDPROC_CFI(flush_icache_page_asm)
985 ENTRY_CFI(flush_kernel_dcache_page_asm)
990 ldil L%dcache_stride, %r1
991 ldw R%dcache_stride(%r1), %r23
994 depdi,z 1, 63-PAGE_SHIFT,1, %r25
996 depwi,z 1, 31-PAGE_SHIFT,1, %r25
1017 cmpb,COND(<<) %r26, %r25,1b
1026 ENDPROC_CFI(flush_kernel_dcache_page_asm)
1028 ENTRY_CFI(purge_kernel_dcache_page_asm)
1033 ldil L%dcache_stride, %r1
1034 ldw R%dcache_stride(%r1), %r23
1037 depdi,z 1, 63-PAGE_SHIFT,1, %r25
1039 depwi,z 1, 31-PAGE_SHIFT,1, %r25
1041 add %r26, %r25, %r25
1042 sub %r25, %r23, %r25
1059 cmpb,COND(<<) %r26, %r25, 1b
1068 ENDPROC_CFI(purge_kernel_dcache_page_asm)
1070 ENTRY_CFI(flush_user_dcache_range_asm)
1075 ldil L%dcache_stride, %r1
1076 ldw R%dcache_stride(%r1), %r23
1078 ANDCM %r26, %r21, %r26
1080 1: cmpb,COND(<<),n %r26, %r25, 1b
1081 fdc,m %r23(%sr3, %r26)
1089 ENDPROC_CFI(flush_user_dcache_range_asm)
1091 ENTRY_CFI(flush_kernel_dcache_range_asm)
1096 ldil L%dcache_stride, %r1
1097 ldw R%dcache_stride(%r1), %r23
1099 ANDCM %r26, %r21, %r26
1101 1: cmpb,COND(<<),n %r26, %r25,1b
1111 ENDPROC_CFI(flush_kernel_dcache_range_asm)
1113 ENTRY_CFI(purge_kernel_dcache_range_asm)
1118 ldil L%dcache_stride, %r1
1119 ldw R%dcache_stride(%r1), %r23
1121 ANDCM %r26, %r21, %r26
1123 1: cmpb,COND(<<),n %r26, %r25,1b
1133 ENDPROC_CFI(purge_kernel_dcache_range_asm)
1135 ENTRY_CFI(flush_user_icache_range_asm)
1140 ldil L%icache_stride, %r1
1141 ldw R%icache_stride(%r1), %r23
1143 ANDCM %r26, %r21, %r26
1145 1: cmpb,COND(<<),n %r26, %r25,1b
1146 fic,m %r23(%sr3, %r26)
1154 ENDPROC_CFI(flush_user_icache_range_asm)
1156 ENTRY_CFI(flush_kernel_icache_page)
1161 ldil L%icache_stride, %r1
1162 ldw R%icache_stride(%r1), %r23
1165 depdi,z 1, 63-PAGE_SHIFT,1, %r25
1167 depwi,z 1, 31-PAGE_SHIFT,1, %r25
1169 add %r26, %r25, %r25
1170 sub %r25, %r23, %r25
1173 1: fic,m %r23(%sr4, %r26)
1174 fic,m %r23(%sr4, %r26)
1175 fic,m %r23(%sr4, %r26)
1176 fic,m %r23(%sr4, %r26)
1177 fic,m %r23(%sr4, %r26)
1178 fic,m %r23(%sr4, %r26)
1179 fic,m %r23(%sr4, %r26)
1180 fic,m %r23(%sr4, %r26)
1181 fic,m %r23(%sr4, %r26)
1182 fic,m %r23(%sr4, %r26)
1183 fic,m %r23(%sr4, %r26)
1184 fic,m %r23(%sr4, %r26)
1185 fic,m %r23(%sr4, %r26)
1186 fic,m %r23(%sr4, %r26)
1187 fic,m %r23(%sr4, %r26)
1188 cmpb,COND(<<) %r26, %r25, 1b
1189 fic,m %r23(%sr4, %r26)
1197 ENDPROC_CFI(flush_kernel_icache_page)
1199 ENTRY_CFI(flush_kernel_icache_range_asm)
1204 ldil L%icache_stride, %r1
1205 ldw R%icache_stride(%r1), %r23
1207 ANDCM %r26, %r21, %r26
1209 1: cmpb,COND(<<),n %r26, %r25, 1b
1210 fic,m %r23(%sr4, %r26)
1217 ENDPROC_CFI(flush_kernel_icache_range_asm)
1221 /* align should cover use of rfi in disable_sr_hashing_asm and
1225 ENTRY_CFI(disable_sr_hashing_asm)
1231 * Switch to real mode
1242 rsm PSW_SM_Q, %r0 /* prep to load iia queue */
1243 mtctl %r0, %cr17 /* Clear IIASQ tail */
1244 mtctl %r0, %cr17 /* Clear IIASQ head */
1245 mtctl %r1, %cr18 /* IIAOQ head */
1247 mtctl %r1, %cr18 /* IIAOQ tail */
1248 load32 REAL_MODE_PSW, %r1
1253 1: cmpib,=,n SRHASH_PCXST, %r26,srdis_pcxs
1254 cmpib,=,n SRHASH_PCXL, %r26,srdis_pcxl
1255 cmpib,=,n SRHASH_PA20, %r26,srdis_pa20
1260 /* Disable Space Register Hashing for PCXS,PCXT,PCXT' */
1262 .word 0x141c1a00 /* mfdiag %dr0, %r28 */
1263 .word 0x141c1a00 /* must issue twice */
1264 depwi 0,18,1, %r28 /* Clear DHE (dcache hash enable) */
1265 depwi 0,20,1, %r28 /* Clear IHE (icache hash enable) */
1266 .word 0x141c1600 /* mtdiag %r28, %dr0 */
1267 .word 0x141c1600 /* must issue twice */
1272 /* Disable Space Register Hashing for PCXL */
1274 .word 0x141c0600 /* mfdiag %dr0, %r28 */
1275 depwi 0,28,2, %r28 /* Clear DHASH_EN & IHASH_EN */
1276 .word 0x141c0240 /* mtdiag %r28, %dr0 */
1281 /* Disable Space Register Hashing for PCXU,PCXU+,PCXW,PCXW+,PCXW2 */
1283 .word 0x144008bc /* mfdiag %dr2, %r28 */
1284 depdi 0, 54,1, %r28 /* clear DIAG_SPHASH_ENAB (bit 54) */
1285 .word 0x145c1840 /* mtdiag %r28, %dr2 */
1289 /* Switch back to virtual mode */
1290 rsm PSW_SM_I, %r0 /* prep to load iia queue */
1298 rsm PSW_SM_Q, %r0 /* prep to load iia queue */
1299 mtctl %r0, %cr17 /* Clear IIASQ tail */
1300 mtctl %r0, %cr17 /* Clear IIASQ head */
1301 mtctl %r1, %cr18 /* IIAOQ head */
1303 mtctl %r1, %cr18 /* IIAOQ tail */
1304 load32 KERNEL_PSW, %r1
1314 ENDPROC_CFI(disable_sr_hashing_asm)