2 * This file contains low-level functions for performing various
3 * types of TLB invalidations on various processors with no hash
6 * This file implements the following functions for all no-hash
7 * processors. Some aren't implemented for some variants. Some
8 * are inline in tlbflush.h
13 * - tlbivax_bcast (not yet)
15 * Code mostly moved over from misc_32.S
17 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
19 * Partially rewritten by Cort Dougan (cort@cs.nmt.edu)
20 * Paul Mackerras, Kumar Gala and Benjamin Herrenschmidt.
22 * This program is free software; you can redistribute it and/or
23 * modify it under the terms of the GNU General Public License
24 * as published by the Free Software Foundation; either version
25 * 2 of the License, or (at your option) any later version.
31 #include <asm/cputable.h>
33 #include <asm/ppc_asm.h>
34 #include <asm/asm-offsets.h>
35 #include <asm/processor.h>
37 #if defined(CONFIG_40x)
40 * 40x implementation needs only tlbil_va
43 /* We run the search with interrupts disabled because we have to change
44 * the PID and I don't want to preempt when that happens.
55 /* There are only 64 TLB entries, so r3 < 64, which means bit 25 is
56 * clear. Since 25 is the V bit in the TLB_TAG, loading this value
57 * will invalidate the TLB entry. */
62 #elif defined(CONFIG_8xx)
65 * Nothing to do for 8xx, everything is inline
68 #elif defined(CONFIG_44x)
71 * 440 implementation uses tlbsx/we for tlbil_va and a full sweep
72 * of the TLB for everything else.
76 rlwimi r5,r4,0,24,31 /* Set TID */
78 /* We have to run the search with interrupts disabled, otherwise
79 * an interrupt which causes a TLB miss can clobber the MMUCR
80 * between the mtspr and the tlbsx.
82 * Critical and Machine Check interrupts take care of saving
83 * and restoring MMUCR, so only normal interrupts have to be
93 /* There are only 64 TLB entries, so r3 < 64,
94 * which means bit 22, is clear. Since 22 is
95 * the V bit in the TLB_PAGEID, loading this
96 * value will invalidate the TLB entry.
98 tlbwe r3, r3, PPC44x_TLB_PAGEID
107 /* Load high watermark */
108 lis r4,tlb_44x_hwater@ha
109 lwz r5,tlb_44x_hwater@l(r4)
111 1: tlbwe r3,r3,PPC44x_TLB_PAGEID
119 #elif defined(CONFIG_FSL_BOOKE)
121 * FSL BookE implementations.
123 * Since feature sections are using _SECTION_ELSE we need
124 * to have the larger code path before the _SECTION_ELSE
128 * Flush MMU TLB on the local processor
131 BEGIN_MMU_FTR_SECTION
132 li r3,(MMUCSR0_TLBFI)@l
133 mtspr SPRN_MMUCSR0, r3
135 mfspr r3,SPRN_MMUCSR0
136 andi. r3,r3,MMUCSR0_TLBFI@l
140 ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_USE_TLBILX)
146 BEGIN_MMU_FTR_SECTION
150 mfspr r4,SPRN_MAS6 /* save MAS6 */
153 mtspr SPRN_MAS6,r4 /* restore MAS6 */
156 li r3,(MMUCSR0_TLBFI)@l
157 mtspr SPRN_MMUCSR0, r3
159 mfspr r3,SPRN_MMUCSR0
160 andi. r3,r3,MMUCSR0_TLBFI@l
162 ALT_MMU_FTR_SECTION_END_IFSET(MMU_FTR_USE_TLBILX)
168 * Flush MMU TLB for a particular address, but only on the local processor
175 ori r4,r4,(MAS6_ISIZE(BOOK3E_PAGESZ_4K))@l
176 mtspr SPRN_MAS6,r4 /* assume AS=0 for now */
177 BEGIN_MMU_FTR_SECTION
179 mfspr r4,SPRN_MAS1 /* check valid */
180 andis. r3,r4,MAS1_VALID@h
187 ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_USE_TLBILX)
192 #elif defined(CONFIG_PPC_BOOK3E)
194 * New Book3E (>= 2.06) implementation
196 * Note: We may be able to get away without the interrupt masking stuff
197 * if we save/restore MAS6 on exceptions that might modify it
200 slwi r4,r3,MAS6_SPID_SHIFT
210 _GLOBAL(_tlbil_pid_noind)
211 slwi r4,r3,MAS6_SPID_SHIFT
232 slwi r4,r4,MAS6_SPID_SHIFT
233 rlwimi r4,r5,MAS6_ISIZE_SHIFT,MAS6_ISIZE_MASK
235 rlwimi r4,r6,MAS6_SIND_SHIFT,MAS6_SIND
236 1: mtspr SPRN_MAS6,r4 /* assume AS=0 for now */
243 _GLOBAL(_tlbivax_bcast)
247 slwi r4,r4,MAS6_SPID_SHIFT
248 rlwimi r4,r5,MAS6_ISIZE_SHIFT,MAS6_ISIZE_MASK
250 rlwimi r4,r6,MAS6_SIND_SHIFT,MAS6_SIND
251 1: mtspr SPRN_MAS6,r4 /* assume AS=0 for now */
260 #ifdef CONFIG_BDI_SWITCH
261 /* Context switch the PTE pointer for the Abatron BDI2000.
262 * The PGDIR is the second parameter.
264 lis r5, abatron_pteptrs@h
265 ori r5, r5, abatron_pteptrs@l
269 isync /* Force context change */
272 #error Unsupported processor type !