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>
39 #include <linux/linkage.h>
44 ENTRY(flush_tlb_all_local)
50 * The pitlbe and pdtlbe instructions should only be used to
51 * flush the entire tlb. Also, there needs to be no intervening
52 * tlb operations, e.g. tlb misses, so the operation needs
53 * to happen in real mode with all interruptions disabled.
56 /* pcxt_ssm_bug - relied upon translation! PA 2.0 Arch. F-4 and F-5 */
57 rsm PSW_SM_I, %r19 /* save I-bit state */
65 rsm PSW_SM_Q, %r0 /* prep to load iia queue */
66 mtctl %r0, %cr17 /* Clear IIASQ tail */
67 mtctl %r0, %cr17 /* Clear IIASQ head */
68 mtctl %r1, %cr18 /* IIAOQ head */
70 mtctl %r1, %cr18 /* IIAOQ tail */
71 load32 REAL_MODE_PSW, %r1
76 1: load32 PA(cache_info), %r1
78 /* Flush Instruction Tlb */
80 LDREG ITLB_SID_BASE(%r1), %r20
81 LDREG ITLB_SID_STRIDE(%r1), %r21
82 LDREG ITLB_SID_COUNT(%r1), %r22
83 LDREG ITLB_OFF_BASE(%r1), %arg0
84 LDREG ITLB_OFF_STRIDE(%r1), %arg1
85 LDREG ITLB_OFF_COUNT(%r1), %arg2
86 LDREG ITLB_LOOP(%r1), %arg3
88 addib,COND(=) -1, %arg3, fitoneloop /* Preadjust and test */
89 movb,<,n %arg3, %r31, fitdone /* If loop < 0, skip */
90 copy %arg0, %r28 /* Init base addr */
92 fitmanyloop: /* Loop if LOOP >= 2 */
94 add %r21, %r20, %r20 /* increment space */
95 copy %arg2, %r29 /* Init middle loop count */
97 fitmanymiddle: /* Loop if LOOP >= 2 */
98 addib,COND(>) -1, %r31, fitmanymiddle /* Adjusted inner loop decr */
100 pitlbe,m %arg1(%sr1, %r28) /* Last pitlbe and addr adjust */
101 addib,COND(>) -1, %r29, fitmanymiddle /* Middle loop decr */
102 copy %arg3, %r31 /* Re-init inner loop count */
104 movb,tr %arg0, %r28, fitmanyloop /* Re-init base addr */
105 addib,COND(<=),n -1, %r22, fitdone /* Outer loop count decr */
107 fitoneloop: /* Loop if LOOP = 1 */
109 copy %arg0, %r28 /* init base addr */
110 copy %arg2, %r29 /* init middle loop count */
112 fitonemiddle: /* Loop if LOOP = 1 */
113 addib,COND(>) -1, %r29, fitonemiddle /* Middle loop count decr */
114 pitlbe,m %arg1(%sr1, %r28) /* pitlbe for one loop */
116 addib,COND(>) -1, %r22, fitoneloop /* Outer loop count decr */
117 add %r21, %r20, %r20 /* increment space */
123 LDREG DTLB_SID_BASE(%r1), %r20
124 LDREG DTLB_SID_STRIDE(%r1), %r21
125 LDREG DTLB_SID_COUNT(%r1), %r22
126 LDREG DTLB_OFF_BASE(%r1), %arg0
127 LDREG DTLB_OFF_STRIDE(%r1), %arg1
128 LDREG DTLB_OFF_COUNT(%r1), %arg2
129 LDREG DTLB_LOOP(%r1), %arg3
131 addib,COND(=) -1, %arg3, fdtoneloop /* Preadjust and test */
132 movb,<,n %arg3, %r31, fdtdone /* If loop < 0, skip */
133 copy %arg0, %r28 /* Init base addr */
135 fdtmanyloop: /* Loop if LOOP >= 2 */
137 add %r21, %r20, %r20 /* increment space */
138 copy %arg2, %r29 /* Init middle loop count */
140 fdtmanymiddle: /* Loop if LOOP >= 2 */
141 addib,COND(>) -1, %r31, fdtmanymiddle /* Adjusted inner loop decr */
143 pdtlbe,m %arg1(%sr1, %r28) /* Last pdtlbe and addr adjust */
144 addib,COND(>) -1, %r29, fdtmanymiddle /* Middle loop decr */
145 copy %arg3, %r31 /* Re-init inner loop count */
147 movb,tr %arg0, %r28, fdtmanyloop /* Re-init base addr */
148 addib,COND(<=),n -1, %r22,fdtdone /* Outer loop count decr */
150 fdtoneloop: /* Loop if LOOP = 1 */
152 copy %arg0, %r28 /* init base addr */
153 copy %arg2, %r29 /* init middle loop count */
155 fdtonemiddle: /* Loop if LOOP = 1 */
156 addib,COND(>) -1, %r29, fdtonemiddle /* Middle loop count decr */
157 pdtlbe,m %arg1(%sr1, %r28) /* pdtlbe for one loop */
159 addib,COND(>) -1, %r22, fdtoneloop /* Outer loop count decr */
160 add %r21, %r20, %r20 /* increment space */
165 * Switch back to virtual mode
176 rsm PSW_SM_Q, %r0 /* prep to load iia queue */
177 mtctl %r0, %cr17 /* Clear IIASQ tail */
178 mtctl %r0, %cr17 /* Clear IIASQ head */
179 mtctl %r1, %cr18 /* IIAOQ head */
181 mtctl %r1, %cr18 /* IIAOQ tail */
182 load32 KERNEL_PSW, %r1
183 or %r1, %r19, %r1 /* I-bit to state on entry */
184 mtctl %r1, %ipsw /* restore I-bit (entire PSW) */
193 ENDPROC(flush_tlb_all_local)
195 .import cache_info,data
197 ENTRY(flush_instruction_cache_local)
202 load32 cache_info, %r1
204 /* Flush Instruction Cache */
206 LDREG ICACHE_BASE(%r1), %arg0
207 LDREG ICACHE_STRIDE(%r1), %arg1
208 LDREG ICACHE_COUNT(%r1), %arg2
209 LDREG ICACHE_LOOP(%r1), %arg3
210 rsm PSW_SM_I, %r22 /* No mmgt ops during loop*/
212 addib,COND(=) -1, %arg3, fioneloop /* Preadjust and test */
213 movb,<,n %arg3, %r31, fisync /* If loop < 0, do sync */
215 fimanyloop: /* Loop if LOOP >= 2 */
216 addib,COND(>) -1, %r31, fimanyloop /* Adjusted inner loop decr */
217 fice %r0(%sr1, %arg0)
218 fice,m %arg1(%sr1, %arg0) /* Last fice and addr adjust */
219 movb,tr %arg3, %r31, fimanyloop /* Re-init inner loop count */
220 addib,COND(<=),n -1, %arg2, fisync /* Outer loop decr */
222 fioneloop: /* Loop if LOOP = 1 */
223 /* Some implementations may flush with a single fice instruction */
224 cmpib,COND(>>=),n 15, %arg2, fioneloop2
227 fice,m %arg1(%sr1, %arg0)
228 fice,m %arg1(%sr1, %arg0)
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 addib,COND(>) -16, %arg2, fioneloop1
243 fice,m %arg1(%sr1, %arg0)
246 cmpb,COND(=),n %arg2, %r0, fisync /* Predict branch taken */
249 addib,COND(>) -1, %arg2, fioneloop2 /* Outer loop count decr */
250 fice,m %arg1(%sr1, %arg0) /* Fice for one loop */
254 mtsm %r22 /* restore I-bit */
260 ENDPROC(flush_instruction_cache_local)
263 .import cache_info, data
264 ENTRY(flush_data_cache_local)
269 load32 cache_info, %r1
271 /* Flush Data Cache */
273 LDREG DCACHE_BASE(%r1), %arg0
274 LDREG DCACHE_STRIDE(%r1), %arg1
275 LDREG DCACHE_COUNT(%r1), %arg2
276 LDREG DCACHE_LOOP(%r1), %arg3
277 rsm PSW_SM_I, %r22 /* No mmgt ops during loop*/
279 addib,COND(=) -1, %arg3, fdoneloop /* Preadjust and test */
280 movb,<,n %arg3, %r31, fdsync /* If loop < 0, do sync */
282 fdmanyloop: /* Loop if LOOP >= 2 */
283 addib,COND(>) -1, %r31, fdmanyloop /* Adjusted inner loop decr */
284 fdce %r0(%sr1, %arg0)
285 fdce,m %arg1(%sr1, %arg0) /* Last fdce and addr adjust */
286 movb,tr %arg3, %r31, fdmanyloop /* Re-init inner loop count */
287 addib,COND(<=),n -1, %arg2, fdsync /* Outer loop decr */
289 fdoneloop: /* Loop if LOOP = 1 */
290 /* Some implementations may flush with a single fdce instruction */
291 cmpib,COND(>>=),n 15, %arg2, fdoneloop2
294 fdce,m %arg1(%sr1, %arg0)
295 fdce,m %arg1(%sr1, %arg0)
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 addib,COND(>) -16, %arg2, fdoneloop1
310 fdce,m %arg1(%sr1, %arg0)
313 cmpb,COND(=),n %arg2, %r0, fdsync /* Predict branch taken */
316 addib,COND(>) -1, %arg2, fdoneloop2 /* Outer loop count decr */
317 fdce,m %arg1(%sr1, %arg0) /* Fdce for one loop */
322 mtsm %r22 /* restore I-bit */
328 ENDPROC(flush_data_cache_local)
332 /* Macros to serialize TLB purge operations on SMP. */
334 .macro tlb_lock la,flags,tmp
336 ldil L%pa_tlb_lock,%r1
337 ldo R%pa_tlb_lock(%r1),\la
349 .macro tlb_unlock la,flags,tmp
357 /* Clear page using kernel mapping. */
359 ENTRY(clear_page_asm)
366 /* Unroll the loop. */
367 ldi (PAGE_SIZE / 128), %r1
387 /* Note reverse branch hint for addib is taken. */
388 addib,COND(>),n -1, %r1, 1b
394 * Note that until (if) we start saving the full 64-bit register
395 * values on interrupt, we can't use std on a 32 bit kernel.
397 ldi (PAGE_SIZE / 64), %r1
417 addib,COND(>),n -1, %r1, 1b
425 ENDPROC(clear_page_asm)
427 /* Copy page using kernel mapping. */
435 /* PA8x00 CPUs can consume 2 loads or 1 store per cycle.
436 * Unroll the loop by hand and arrange insn appropriately.
437 * Prefetch doesn't improve performance on rp3440.
438 * GCC probably can do this just as well...
441 ldi (PAGE_SIZE / 128), %r1
485 /* Note reverse branch hint for addib is taken. */
486 addib,COND(>),n -1, %r1, 1b
492 * This loop is optimized for PCXL/PCXL2 ldw/ldw and stw/stw
493 * bundles (very restricted rules for bundling).
494 * Note that until (if) we start saving
495 * the full 64 bit register values on interrupt, we can't
496 * use ldd/std on a 32 bit kernel.
499 ldi (PAGE_SIZE / 64), %r1
535 addib,COND(>),n -1, %r1, 1b
543 ENDPROC(copy_page_asm)
546 * NOTE: Code in clear_user_page has a hard coded dependency on the
547 * maximum alias boundary being 4 Mb. We've been assured by the
548 * parisc chip designers that there will not ever be a parisc
549 * chip with a larger alias boundary (Never say never :-) ).
551 * Subtle: the dtlb miss handlers support the temp alias region by
552 * "knowing" that if a dtlb miss happens within the temp alias
553 * region it must have occurred while in clear_user_page. Since
554 * this routine makes use of processor local translations, we
555 * don't want to insert them into the kernel page table. Instead,
556 * we load up some general registers (they need to be registers
557 * which aren't shadowed) with the physical page numbers (preshifted
558 * for tlb insertion) needed to insert the translations. When we
559 * miss on the translation, the dtlb miss handler inserts the
560 * translation into the tlb using these values:
562 * %r26 physical page (shifted for tlb insert) of "to" translation
563 * %r23 physical page (shifted for tlb insert) of "from" translation
567 * We can't do this since copy_user_page is used to bring in
568 * file data that might have instructions. Since the data would
569 * then need to be flushed out so the i-fetch can see it, it
570 * makes more sense to just copy through the kernel translation
573 * I'm still keeping this around because it may be possible to
574 * use it if more information is passed into copy_user_page().
575 * Have to do some measurements to see if it is worthwhile to
576 * lobby for such a change.
580 ENTRY(copy_user_page_asm)
585 /* Convert virtual `to' and `from' addresses to physical addresses.
586 Move `from' physical address to non shadowed register. */
587 ldil L%(__PAGE_OFFSET), %r1
591 ldil L%(TMPALIAS_MAP_START), %r28
592 /* FIXME for different page sizes != 4k */
594 #if (TMPALIAS_MAP_START >= 0x80000000)
595 depdi 0, 31,32, %r28 /* clear any sign extension */
597 extrd,u %r26,56,32, %r26 /* convert phys addr to tlb insert format */
598 extrd,u %r23,56,32, %r23 /* convert phys addr to tlb insert format */
599 depd %r24,63,22, %r28 /* Form aliased virtual address 'to' */
600 depdi 0, 63,12, %r28 /* Clear any offset bits */
602 depdi 1, 41,1, %r29 /* Form aliased virtual address 'from' */
604 extrw,u %r26, 24,25, %r26 /* convert phys addr to tlb insert format */
605 extrw,u %r23, 24,25, %r23 /* convert phys addr to tlb insert format */
606 depw %r24, 31,22, %r28 /* Form aliased virtual address 'to' */
607 depwi 0, 31,12, %r28 /* Clear any offset bits */
609 depwi 1, 9,1, %r29 /* Form aliased virtual address 'from' */
612 /* Purge any old translations */
618 tlb_lock %r20,%r21,%r22
621 tlb_unlock %r20,%r21,%r22
625 /* PA8x00 CPUs can consume 2 loads or 1 store per cycle.
626 * Unroll the loop by hand and arrange insn appropriately.
627 * GCC probably can do this just as well.
631 ldi (PAGE_SIZE / 128), %r1
675 /* conditional branches nullify on forward taken branch, and on
676 * non-taken backward branch. Note that .+4 is a backwards branch.
677 * The ldd should only get executed if the branch is taken.
679 addib,COND(>),n -1, %r1, 1b /* bundle 10 */
680 ldd 0(%r29), %r19 /* start next loads */
683 ldi (PAGE_SIZE / 64), %r1
686 * This loop is optimized for PCXL/PCXL2 ldw/ldw and stw/stw
687 * bundles (very restricted rules for bundling). It probably
688 * does OK on PCXU and better, but we could do better with
689 * ldd/std instructions. Note that until (if) we start saving
690 * the full 64 bit register values on interrupt, we can't
691 * use ldd/std on a 32 bit kernel.
728 addib,COND(>) -1, %r1,1b
737 ENDPROC(copy_user_page_asm)
739 ENTRY(clear_user_page_asm)
746 ldil L%(TMPALIAS_MAP_START), %r28
748 #if (TMPALIAS_MAP_START >= 0x80000000)
749 depdi 0, 31,32, %r28 /* clear any sign extension */
750 /* FIXME: page size dependend */
752 extrd,u %r26, 56,32, %r26 /* convert phys addr to tlb insert format */
753 depd %r25, 63,22, %r28 /* Form aliased virtual address 'to' */
754 depdi 0, 63,12, %r28 /* Clear any offset bits */
756 extrw,u %r26, 24,25, %r26 /* convert phys addr to tlb insert format */
757 depw %r25, 31,22, %r28 /* Form aliased virtual address 'to' */
758 depwi 0, 31,12, %r28 /* Clear any offset bits */
761 /* Purge any old translation */
766 tlb_lock %r20,%r21,%r22
768 tlb_unlock %r20,%r21,%r22
772 ldi (PAGE_SIZE / 128), %r1
774 /* PREFETCH (Write) has not (yet) been proven to help here */
775 /* #define PREFETCHW_OP ldd 256(%0), %r0 */
793 addib,COND(>) -1, %r1, 1b
796 #else /* ! CONFIG_64BIT */
797 ldi (PAGE_SIZE / 64), %r1
815 addib,COND(>) -1, %r1, 1b
817 #endif /* CONFIG_64BIT */
824 ENDPROC(clear_user_page_asm)
826 ENTRY(flush_dcache_page_asm)
831 ldil L%(TMPALIAS_MAP_START), %r28
833 #if (TMPALIAS_MAP_START >= 0x80000000)
834 depdi 0, 31,32, %r28 /* clear any sign extension */
835 /* FIXME: page size dependend */
837 extrd,u %r26, 56,32, %r26 /* convert phys addr to tlb insert format */
838 depd %r25, 63,22, %r28 /* Form aliased virtual address 'to' */
839 depdi 0, 63,12, %r28 /* Clear any offset bits */
841 extrw,u %r26, 24,25, %r26 /* convert phys addr to tlb insert format */
842 depw %r25, 31,22, %r28 /* Form aliased virtual address 'to' */
843 depwi 0, 31,12, %r28 /* Clear any offset bits */
846 /* Purge any old translation */
851 tlb_lock %r20,%r21,%r22
853 tlb_unlock %r20,%r21,%r22
856 ldil L%dcache_stride, %r1
857 ldw R%dcache_stride(%r1), %r1
860 depdi,z 1, 63-PAGE_SHIFT,1, %r25
862 depwi,z 1, 31-PAGE_SHIFT,1, %r25
883 cmpb,COND(<<) %r28, %r25,1b
891 tlb_lock %r20,%r21,%r22
893 tlb_unlock %r20,%r21,%r22
901 ENDPROC(flush_dcache_page_asm)
903 ENTRY(flush_icache_page_asm)
908 ldil L%(TMPALIAS_MAP_START), %r28
910 #if (TMPALIAS_MAP_START >= 0x80000000)
911 depdi 0, 31,32, %r28 /* clear any sign extension */
912 /* FIXME: page size dependend */
914 extrd,u %r26, 56,32, %r26 /* convert phys addr to tlb insert format */
915 depd %r25, 63,22, %r28 /* Form aliased virtual address 'to' */
916 depdi 0, 63,12, %r28 /* Clear any offset bits */
918 extrw,u %r26, 24,25, %r26 /* convert phys addr to tlb insert format */
919 depw %r25, 31,22, %r28 /* Form aliased virtual address 'to' */
920 depwi 0, 31,12, %r28 /* Clear any offset bits */
923 /* Purge any old translation */
926 pitlb,l %r0(%sr4,%r28)
928 tlb_lock %r20,%r21,%r22
930 tlb_unlock %r20,%r21,%r22
933 ldil L%icache_stride, %r1
934 ldw R%icache_stride(%r1), %r1
937 depdi,z 1, 63-PAGE_SHIFT,1, %r25
939 depwi,z 1, 31-PAGE_SHIFT,1, %r25
945 /* fic only has the type 26 form on PA1.1, requiring an
946 * explicit space specification, so use %sr4 */
947 1: fic,m %r1(%sr4,%r28)
962 cmpb,COND(<<) %r28, %r25,1b
968 pitlb,l %r0(%sr4,%r25)
970 tlb_lock %r20,%r21,%r22
972 tlb_unlock %r20,%r21,%r22
980 ENDPROC(flush_icache_page_asm)
982 ENTRY(flush_kernel_dcache_page_asm)
987 ldil L%dcache_stride, %r1
988 ldw R%dcache_stride(%r1), %r23
991 depdi,z 1, 63-PAGE_SHIFT,1, %r25
993 depwi,z 1, 31-PAGE_SHIFT,1, %r25
1014 cmpb,COND(<<) %r26, %r25,1b
1023 ENDPROC(flush_kernel_dcache_page_asm)
1025 ENTRY(purge_kernel_dcache_page_asm)
1030 ldil L%dcache_stride, %r1
1031 ldw R%dcache_stride(%r1), %r23
1034 depdi,z 1, 63-PAGE_SHIFT,1, %r25
1036 depwi,z 1, 31-PAGE_SHIFT,1, %r25
1038 add %r26, %r25, %r25
1039 sub %r25, %r23, %r25
1056 cmpb,COND(<<) %r26, %r25, 1b
1065 ENDPROC(purge_kernel_dcache_page_asm)
1067 ENTRY(flush_user_dcache_range_asm)
1072 ldil L%dcache_stride, %r1
1073 ldw R%dcache_stride(%r1), %r23
1075 ANDCM %r26, %r21, %r26
1077 1: cmpb,COND(<<),n %r26, %r25, 1b
1078 fdc,m %r23(%sr3, %r26)
1086 ENDPROC(flush_user_dcache_range_asm)
1088 ENTRY(flush_kernel_dcache_range_asm)
1093 ldil L%dcache_stride, %r1
1094 ldw R%dcache_stride(%r1), %r23
1096 ANDCM %r26, %r21, %r26
1098 1: cmpb,COND(<<),n %r26, %r25,1b
1108 ENDPROC(flush_kernel_dcache_range_asm)
1110 ENTRY(flush_user_icache_range_asm)
1115 ldil L%icache_stride, %r1
1116 ldw R%icache_stride(%r1), %r23
1118 ANDCM %r26, %r21, %r26
1120 1: cmpb,COND(<<),n %r26, %r25,1b
1121 fic,m %r23(%sr3, %r26)
1129 ENDPROC(flush_user_icache_range_asm)
1131 ENTRY(flush_kernel_icache_page)
1136 ldil L%icache_stride, %r1
1137 ldw R%icache_stride(%r1), %r23
1140 depdi,z 1, 63-PAGE_SHIFT,1, %r25
1142 depwi,z 1, 31-PAGE_SHIFT,1, %r25
1144 add %r26, %r25, %r25
1145 sub %r25, %r23, %r25
1148 1: fic,m %r23(%sr4, %r26)
1149 fic,m %r23(%sr4, %r26)
1150 fic,m %r23(%sr4, %r26)
1151 fic,m %r23(%sr4, %r26)
1152 fic,m %r23(%sr4, %r26)
1153 fic,m %r23(%sr4, %r26)
1154 fic,m %r23(%sr4, %r26)
1155 fic,m %r23(%sr4, %r26)
1156 fic,m %r23(%sr4, %r26)
1157 fic,m %r23(%sr4, %r26)
1158 fic,m %r23(%sr4, %r26)
1159 fic,m %r23(%sr4, %r26)
1160 fic,m %r23(%sr4, %r26)
1161 fic,m %r23(%sr4, %r26)
1162 fic,m %r23(%sr4, %r26)
1163 cmpb,COND(<<) %r26, %r25, 1b
1164 fic,m %r23(%sr4, %r26)
1172 ENDPROC(flush_kernel_icache_page)
1174 ENTRY(flush_kernel_icache_range_asm)
1179 ldil L%icache_stride, %r1
1180 ldw R%icache_stride(%r1), %r23
1182 ANDCM %r26, %r21, %r26
1184 1: cmpb,COND(<<),n %r26, %r25, 1b
1185 fic,m %r23(%sr4, %r26)
1192 ENDPROC(flush_kernel_icache_range_asm)
1194 /* align should cover use of rfi in disable_sr_hashing_asm and
1198 ENTRY(disable_sr_hashing_asm)
1204 * Switch to real mode
1215 rsm PSW_SM_Q, %r0 /* prep to load iia queue */
1216 mtctl %r0, %cr17 /* Clear IIASQ tail */
1217 mtctl %r0, %cr17 /* Clear IIASQ head */
1218 mtctl %r1, %cr18 /* IIAOQ head */
1220 mtctl %r1, %cr18 /* IIAOQ tail */
1221 load32 REAL_MODE_PSW, %r1
1226 1: cmpib,=,n SRHASH_PCXST, %r26,srdis_pcxs
1227 cmpib,=,n SRHASH_PCXL, %r26,srdis_pcxl
1228 cmpib,=,n SRHASH_PA20, %r26,srdis_pa20
1233 /* Disable Space Register Hashing for PCXS,PCXT,PCXT' */
1235 .word 0x141c1a00 /* mfdiag %dr0, %r28 */
1236 .word 0x141c1a00 /* must issue twice */
1237 depwi 0,18,1, %r28 /* Clear DHE (dcache hash enable) */
1238 depwi 0,20,1, %r28 /* Clear IHE (icache hash enable) */
1239 .word 0x141c1600 /* mtdiag %r28, %dr0 */
1240 .word 0x141c1600 /* must issue twice */
1245 /* Disable Space Register Hashing for PCXL */
1247 .word 0x141c0600 /* mfdiag %dr0, %r28 */
1248 depwi 0,28,2, %r28 /* Clear DHASH_EN & IHASH_EN */
1249 .word 0x141c0240 /* mtdiag %r28, %dr0 */
1254 /* Disable Space Register Hashing for PCXU,PCXU+,PCXW,PCXW+,PCXW2 */
1256 .word 0x144008bc /* mfdiag %dr2, %r28 */
1257 depdi 0, 54,1, %r28 /* clear DIAG_SPHASH_ENAB (bit 54) */
1258 .word 0x145c1840 /* mtdiag %r28, %dr2 */
1262 /* Switch back to virtual mode */
1263 rsm PSW_SM_I, %r0 /* prep to load iia queue */
1271 rsm PSW_SM_Q, %r0 /* prep to load iia queue */
1272 mtctl %r0, %cr17 /* Clear IIASQ tail */
1273 mtctl %r0, %cr17 /* Clear IIASQ head */
1274 mtctl %r1, %cr18 /* IIAOQ head */
1276 mtctl %r1, %cr18 /* IIAOQ tail */
1277 load32 KERNEL_PSW, %r1
1287 ENDPROC(disable_sr_hashing_asm)