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-rw-r--r--arch/powerpc/kernel/head_fsl_booke.S200
1 files changed, 3 insertions, 197 deletions
diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S
index edd4a57fd29e..4faeba247854 100644
--- a/arch/powerpc/kernel/head_fsl_booke.S
+++ b/arch/powerpc/kernel/head_fsl_booke.S
@@ -94,204 +94,10 @@ _ENTRY(_start);
94 */ 94 */
95 95
96_ENTRY(__early_start) 96_ENTRY(__early_start)
97/* 1. Find the index of the entry we're executing in */
98 bl invstr /* Find our address */
99invstr: mflr r6 /* Make it accessible */
100 mfmsr r7
101 rlwinm r4,r7,27,31,31 /* extract MSR[IS] */
102 mfspr r7, SPRN_PID0
103 slwi r7,r7,16
104 or r7,r7,r4
105 mtspr SPRN_MAS6,r7
106 tlbsx 0,r6 /* search MSR[IS], SPID=PID0 */
107 mfspr r7,SPRN_MAS1
108 andis. r7,r7,MAS1_VALID@h
109 bne match_TLB
110
111 mfspr r7,SPRN_MMUCFG
112 rlwinm r7,r7,21,28,31 /* extract MMUCFG[NPIDS] */
113 cmpwi r7,3
114 bne match_TLB /* skip if NPIDS != 3 */
115
116 mfspr r7,SPRN_PID1
117 slwi r7,r7,16
118 or r7,r7,r4
119 mtspr SPRN_MAS6,r7
120 tlbsx 0,r6 /* search MSR[IS], SPID=PID1 */
121 mfspr r7,SPRN_MAS1
122 andis. r7,r7,MAS1_VALID@h
123 bne match_TLB
124 mfspr r7, SPRN_PID2
125 slwi r7,r7,16
126 or r7,r7,r4
127 mtspr SPRN_MAS6,r7
128 tlbsx 0,r6 /* Fall through, we had to match */
129
130match_TLB:
131 mfspr r7,SPRN_MAS0
132 rlwinm r3,r7,16,20,31 /* Extract MAS0(Entry) */
133
134 mfspr r7,SPRN_MAS1 /* Insure IPROT set */
135 oris r7,r7,MAS1_IPROT@h
136 mtspr SPRN_MAS1,r7
137 tlbwe
138
139/* 2. Invalidate all entries except the entry we're executing in */
140 mfspr r9,SPRN_TLB1CFG
141 andi. r9,r9,0xfff
142 li r6,0 /* Set Entry counter to 0 */
1431: lis r7,0x1000 /* Set MAS0(TLBSEL) = 1 */
144 rlwimi r7,r6,16,4,15 /* Setup MAS0 = TLBSEL | ESEL(r6) */
145 mtspr SPRN_MAS0,r7
146 tlbre
147 mfspr r7,SPRN_MAS1
148 rlwinm r7,r7,0,2,31 /* Clear MAS1 Valid and IPROT */
149 cmpw r3,r6
150 beq skpinv /* Dont update the current execution TLB */
151 mtspr SPRN_MAS1,r7
152 tlbwe
153 isync
154skpinv: addi r6,r6,1 /* Increment */
155 cmpw r6,r9 /* Are we done? */
156 bne 1b /* If not, repeat */
157
158 /* Invalidate TLB0 */
159 li r6,0x04
160 tlbivax 0,r6
161 TLBSYNC
162 /* Invalidate TLB1 */
163 li r6,0x0c
164 tlbivax 0,r6
165 TLBSYNC
166
167/* 3. Setup a temp mapping and jump to it */
168 andi. r5, r3, 0x1 /* Find an entry not used and is non-zero */
169 addi r5, r5, 0x1
170 lis r7,0x1000 /* Set MAS0(TLBSEL) = 1 */
171 rlwimi r7,r3,16,4,15 /* Setup MAS0 = TLBSEL | ESEL(r3) */
172 mtspr SPRN_MAS0,r7
173 tlbre
174
175 /* grab and fixup the RPN */
176 mfspr r6,SPRN_MAS1 /* extract MAS1[SIZE] */
177 rlwinm r6,r6,25,27,31
178 li r8,-1
179 addi r6,r6,10
180 slw r6,r8,r6 /* convert to mask */
181
182 bl 1f /* Find our address */
1831: mflr r7
184
185 mfspr r8,SPRN_MAS3
186#ifdef CONFIG_PHYS_64BIT
187 mfspr r23,SPRN_MAS7
188#endif
189 and r8,r6,r8
190 subfic r9,r6,-4096
191 and r9,r9,r7
192
193 or r25,r8,r9
194 ori r8,r25,(MAS3_SX|MAS3_SW|MAS3_SR)
195
196 /* Just modify the entry ID and EPN for the temp mapping */
197 lis r7,0x1000 /* Set MAS0(TLBSEL) = 1 */
198 rlwimi r7,r5,16,4,15 /* Setup MAS0 = TLBSEL | ESEL(r5) */
199 mtspr SPRN_MAS0,r7
200 xori r6,r4,1 /* Setup TMP mapping in the other Address space */
201 slwi r6,r6,12
202 oris r6,r6,(MAS1_VALID|MAS1_IPROT)@h
203 ori r6,r6,(MAS1_TSIZE(BOOK3E_PAGESZ_4K))@l
204 mtspr SPRN_MAS1,r6
205 mfspr r6,SPRN_MAS2
206 li r7,0 /* temp EPN = 0 */
207 rlwimi r7,r6,0,20,31
208 mtspr SPRN_MAS2,r7
209 mtspr SPRN_MAS3,r8
210 tlbwe
211
212 xori r6,r4,1
213 slwi r6,r6,5 /* setup new context with other address space */
214 bl 1f /* Find our address */
2151: mflr r9
216 rlwimi r7,r9,0,20,31
217 addi r7,r7,(2f - 1b)
218 mtspr SPRN_SRR0,r7
219 mtspr SPRN_SRR1,r6
220 rfi
2212:
222/* 4. Clear out PIDs & Search info */
223 li r6,0
224 mtspr SPRN_MAS6,r6
225 mtspr SPRN_PID0,r6
226
227 mfspr r7,SPRN_MMUCFG
228 rlwinm r7,r7,21,28,31 /* extract MMUCFG[NPIDS] */
229 cmpwi r7,3
230 bne 2f /* skip if NPIDS != 3 */
231 97
232 mtspr SPRN_PID1,r6 98#define ENTRY_MAPPING_BOOT_SETUP
233 mtspr SPRN_PID2,r6 99#include "fsl_booke_entry_mapping.S"
234 100#undef ENTRY_MAPPING_BOOT_SETUP
235/* 5. Invalidate mapping we started in */
2362:
237 lis r7,0x1000 /* Set MAS0(TLBSEL) = 1 */
238 rlwimi r7,r3,16,4,15 /* Setup MAS0 = TLBSEL | ESEL(r3) */
239 mtspr SPRN_MAS0,r7
240 tlbre
241 mfspr r6,SPRN_MAS1
242 rlwinm r6,r6,0,2,0 /* clear IPROT */
243 mtspr SPRN_MAS1,r6
244 tlbwe
245 /* Invalidate TLB1 */
246 li r9,0x0c
247 tlbivax 0,r9
248 TLBSYNC
249
250/* The mapping only needs to be cache-coherent on SMP */
251#ifdef CONFIG_SMP
252#define M_IF_SMP MAS2_M
253#else
254#define M_IF_SMP 0
255#endif
256
257/* 6. Setup KERNELBASE mapping in TLB1[0] */
258 lis r6,0x1000 /* Set MAS0(TLBSEL) = TLB1(1), ESEL = 0 */
259 mtspr SPRN_MAS0,r6
260 lis r6,(MAS1_VALID|MAS1_IPROT)@h
261 ori r6,r6,(MAS1_TSIZE(BOOK3E_PAGESZ_64M))@l
262 mtspr SPRN_MAS1,r6
263 lis r6,MAS2_VAL(PAGE_OFFSET, BOOK3E_PAGESZ_64M, M_IF_SMP)@h
264 ori r6,r6,MAS2_VAL(PAGE_OFFSET, BOOK3E_PAGESZ_64M, M_IF_SMP)@l
265 mtspr SPRN_MAS2,r6
266 mtspr SPRN_MAS3,r8
267 tlbwe
268
269/* 7. Jump to KERNELBASE mapping */
270 lis r6,(KERNELBASE & ~0xfff)@h
271 ori r6,r6,(KERNELBASE & ~0xfff)@l
272 lis r7,MSR_KERNEL@h
273 ori r7,r7,MSR_KERNEL@l
274 bl 1f /* Find our address */
2751: mflr r9
276 rlwimi r6,r9,0,20,31
277 addi r6,r6,(2f - 1b)
278 mtspr SPRN_SRR0,r6
279 mtspr SPRN_SRR1,r7
280 rfi /* start execution out of TLB1[0] entry */
281
282/* 8. Clear out the temp mapping */
2832: lis r7,0x1000 /* Set MAS0(TLBSEL) = 1 */
284 rlwimi r7,r5,16,4,15 /* Setup MAS0 = TLBSEL | ESEL(r5) */
285 mtspr SPRN_MAS0,r7
286 tlbre
287 mfspr r8,SPRN_MAS1
288 rlwinm r8,r8,0,2,0 /* clear IPROT */
289 mtspr SPRN_MAS1,r8
290 tlbwe
291 /* Invalidate TLB1 */
292 li r9,0x0c
293 tlbivax 0,r9
294 TLBSYNC
295 101
296 /* Establish the interrupt vector offsets */ 102 /* Establish the interrupt vector offsets */
297 SET_IVOR(0, CriticalInput); 103 SET_IVOR(0, CriticalInput);