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review.evervolv.com / android_kernel_htc_msm8960 / 64658743fdd40021e3ac91e8ff260ad06578dd23 / . / arch / sparc64 / kernel / trampoline.S
blob: 56ff552113410b2b2216aa519e4221e1aedb68d8 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/* $Id: trampoline.S,v 1.26 2002/02/09 19:49:30 davem Exp $
2 * trampoline.S: Jump start slave processors on sparc64.
3 *
4 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
5 */
6
Sam Ravnborg0f7f22d2008-02-20 22:22:16 -0800[diff] [blame]7#include <linux/init.h>
8
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]9#include <asm/head.h>
10#include <asm/asi.h>
11#include <asm/lsu.h>
12#include <asm/dcr.h>
13#include <asm/dcu.h>
14#include <asm/pstate.h>
15#include <asm/page.h>
16#include <asm/pgtable.h>
17#include <asm/spitfire.h>
18#include <asm/processor.h>
19#include <asm/thread_info.h>
20#include <asm/mmu.h>
David S. Millerd82ace72006-02-09 02:52:44 -0800[diff] [blame]21#include <asm/hypervisor.h>
David S. Miller3af6e012006-02-14 00:55:49 -0800[diff] [blame]22#include <asm/cpudata.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]23
24 .data
25 .align 8
26call_method:
27 .asciz "call-method"
28 .align 8
29itlb_load:
30 .asciz "SUNW,itlb-load"
31 .align 8
32dtlb_load:
33 .asciz "SUNW,dtlb-load"
34
David S. Miller72aff532006-02-17 01:29:17 -0800[diff] [blame]35 /* XXX __cpuinit this thing XXX */
36#define TRAMP_STACK_SIZE 1024
37 .align 16
38tramp_stack:
39 .skip TRAMP_STACK_SIZE
40
Sam Ravnborg0f7f22d2008-02-20 22:22:16 -0800[diff] [blame]41 __CPUINIT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]42 .align 8
43 .globl sparc64_cpu_startup, sparc64_cpu_startup_end
44sparc64_cpu_startup:
David S. Millerd82ace72006-02-09 02:52:44 -0800[diff] [blame]45 BRANCH_IF_SUN4V(g1, niagara_startup)
46 BRANCH_IF_CHEETAH_BASE(g1, g5, cheetah_startup)
47 BRANCH_IF_CHEETAH_PLUS_OR_FOLLOWON(g1, g5, cheetah_plus_startup)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]48
49 ba,pt %xcc, spitfire_startup
50 nop
51
52cheetah_plus_startup:
53 /* Preserve OBP chosen DCU and DCR register settings. */
54 ba,pt %xcc, cheetah_generic_startup
55 nop
56
57cheetah_startup:
58 mov DCR_BPE | DCR_RPE | DCR_SI | DCR_IFPOE | DCR_MS, %g1
59 wr %g1, %asr18
60
61 sethi %uhi(DCU_ME|DCU_RE|DCU_HPE|DCU_SPE|DCU_SL|DCU_WE), %g5
62 or %g5, %ulo(DCU_ME|DCU_RE|DCU_HPE|DCU_SPE|DCU_SL|DCU_WE), %g5
63 sllx %g5, 32, %g5
64 or %g5, DCU_DM | DCU_IM | DCU_DC | DCU_IC, %g5
65 stxa %g5, [%g0] ASI_DCU_CONTROL_REG
66 membar #Sync
David S. Miller72aff532006-02-17 01:29:17 -0800[diff] [blame]67 /* fallthru */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]68
69cheetah_generic_startup:
70 mov TSB_EXTENSION_P, %g3
71 stxa %g0, [%g3] ASI_DMMU
72 stxa %g0, [%g3] ASI_IMMU
73 membar #Sync
74
75 mov TSB_EXTENSION_S, %g3
76 stxa %g0, [%g3] ASI_DMMU
77 membar #Sync
78
79 mov TSB_EXTENSION_N, %g3
80 stxa %g0, [%g3] ASI_DMMU
81 stxa %g0, [%g3] ASI_IMMU
82 membar #Sync
David S. Millerd82ace72006-02-09 02:52:44 -0800[diff] [blame]83 /* fallthru */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]84
David S. Millerd82ace72006-02-09 02:52:44 -0800[diff] [blame]85niagara_startup:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]86 /* Disable STICK_INT interrupts. */
87 sethi %hi(0x80000000), %g5
88 sllx %g5, 32, %g5
89 wr %g5, %asr25
90
91 ba,pt %xcc, startup_continue
92 nop
93
94spitfire_startup:
95 mov (LSU_CONTROL_IC | LSU_CONTROL_DC | LSU_CONTROL_IM | LSU_CONTROL_DM), %g1
96 stxa %g1, [%g0] ASI_LSU_CONTROL
97 membar #Sync
98
99startup_continue:
David S. Miller7dc40882007-08-16 01:56:00 -0700[diff] [blame]100 mov %o0, %l0
101 BRANCH_IF_SUN4V(g1, niagara_lock_tlb)
102
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]103 sethi %hi(0x80000000), %g2
104 sllx %g2, 32, %g2
105 wr %g2, 0, %tick_cmpr
106
107 /* Call OBP by hand to lock KERNBASE into i/d tlbs.
David S. Miller64658742008-03-21 17:01:38 -0700[diff] [blame^]108 * We lock 'num_kernel_image_mappings' consequetive entries.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]109 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]110 sethi %hi(prom_entry_lock), %g2
1111: ldstub [%g2 + %lo(prom_entry_lock)], %g1
David S. Millerb445e262005-06-27 15:42:04 -0700[diff] [blame]112 membar #StoreLoad | #StoreStore
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]113 brnz,pn %g1, 1b
David S. Millerb445e262005-06-27 15:42:04 -0700[diff] [blame]114 nop
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]115
116 sethi %hi(p1275buf), %g2
117 or %g2, %lo(p1275buf), %g2
118 ldx [%g2 + 0x10], %l2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]119 add %l2, -(192 + 128), %sp
120 flushw
121
David S. Miller64658742008-03-21 17:01:38 -0700[diff] [blame^]122 /* Setup the loop variables:
123 * %l3: VADDR base
124 * %l4: TTE base
125 * %l5: Loop iterator, iterates from 0 to 'num_kernel_image_mappings'
126 * %l6: Number of TTE entries to map
127 * %l7: Highest TTE entry number, we count down
128 */
129 sethi %hi(KERNBASE), %l3
130 sethi %hi(kern_locked_tte_data), %l4
131 ldx [%l4 + %lo(kern_locked_tte_data)], %l4
132 clr %l5
133 sethi %hi(num_kernel_image_mappings), %l6
134 lduw [%l6 + %lo(num_kernel_image_mappings)], %l6
135 add %l6, 1, %l6
136
137 mov 15, %l7
138 BRANCH_IF_ANY_CHEETAH(g1,g5,2f)
139
140 mov 63, %l7
1412:
142
1433:
144 /* Lock into I-MMU */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]145 sethi %hi(call_method), %g2
146 or %g2, %lo(call_method), %g2
147 stx %g2, [%sp + 2047 + 128 + 0x00]
148 mov 5, %g2
149 stx %g2, [%sp + 2047 + 128 + 0x08]
150 mov 1, %g2
151 stx %g2, [%sp + 2047 + 128 + 0x10]
152 sethi %hi(itlb_load), %g2
153 or %g2, %lo(itlb_load), %g2
154 stx %g2, [%sp + 2047 + 128 + 0x18]
David S. Millerbff06d52005-09-22 20:11:33 -0700[diff] [blame]155 sethi %hi(prom_mmu_ihandle_cache), %g2
156 lduw [%g2 + %lo(prom_mmu_ihandle_cache)], %g2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]157 stx %g2, [%sp + 2047 + 128 + 0x20]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]158
David S. Miller64658742008-03-21 17:01:38 -0700[diff] [blame^]159 /* Each TTE maps 4MB, convert index to offset. */
160 sllx %l5, 22, %g1
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]161
David S. Miller64658742008-03-21 17:01:38 -0700[diff] [blame^]162 add %l3, %g1, %g2
163 stx %g2, [%sp + 2047 + 128 + 0x28] ! VADDR
164 add %l4, %g1, %g2
165 stx %g2, [%sp + 2047 + 128 + 0x30] ! TTE
166
167 /* TTE index is highest minus loop index. */
168 sub %l7, %l5, %g2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]169 stx %g2, [%sp + 2047 + 128 + 0x38]
David S. Miller64658742008-03-21 17:01:38 -0700[diff] [blame^]170
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]171 sethi %hi(p1275buf), %g2
172 or %g2, %lo(p1275buf), %g2
173 ldx [%g2 + 0x08], %o1
174 call %o1
175 add %sp, (2047 + 128), %o0
176
David S. Miller64658742008-03-21 17:01:38 -0700[diff] [blame^]177 /* Lock into D-MMU */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]178 sethi %hi(call_method), %g2
179 or %g2, %lo(call_method), %g2
180 stx %g2, [%sp + 2047 + 128 + 0x00]
181 mov 5, %g2
182 stx %g2, [%sp + 2047 + 128 + 0x08]
183 mov 1, %g2
184 stx %g2, [%sp + 2047 + 128 + 0x10]
185 sethi %hi(dtlb_load), %g2
186 or %g2, %lo(dtlb_load), %g2
187 stx %g2, [%sp + 2047 + 128 + 0x18]
David S. Millerbff06d52005-09-22 20:11:33 -0700[diff] [blame]188 sethi %hi(prom_mmu_ihandle_cache), %g2
189 lduw [%g2 + %lo(prom_mmu_ihandle_cache)], %g2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]190 stx %g2, [%sp + 2047 + 128 + 0x20]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]191
David S. Miller64658742008-03-21 17:01:38 -0700[diff] [blame^]192 /* Each TTE maps 4MB, convert index to offset. */
193 sllx %l5, 22, %g1
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]194
David S. Miller64658742008-03-21 17:01:38 -0700[diff] [blame^]195 add %l3, %g1, %g2
196 stx %g2, [%sp + 2047 + 128 + 0x28] ! VADDR
197 add %l4, %g1, %g2
198 stx %g2, [%sp + 2047 + 128 + 0x30] ! TTE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]199
David S. Miller64658742008-03-21 17:01:38 -0700[diff] [blame^]200 /* TTE index is highest minus loop index. */
201 sub %l7, %l5, %g2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]202 stx %g2, [%sp + 2047 + 128 + 0x38]
David S. Miller64658742008-03-21 17:01:38 -0700[diff] [blame^]203
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]204 sethi %hi(p1275buf), %g2
205 or %g2, %lo(p1275buf), %g2
206 ldx [%g2 + 0x08], %o1
207 call %o1
208 add %sp, (2047 + 128), %o0
209
David S. Miller64658742008-03-21 17:01:38 -0700[diff] [blame^]210 add %l5, 1, %l5
211 cmp %l5, %l6
212 bne,pt %xcc, 3b
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]213 nop
214
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]215 sethi %hi(prom_entry_lock), %g2
216 stb %g0, [%g2 + %lo(prom_entry_lock)]
217 membar #StoreStore | #StoreLoad
218
David S. Millerd82ace72006-02-09 02:52:44 -0800[diff] [blame]219 ba,pt %xcc, after_lock_tlb
220 nop
221
222niagara_lock_tlb:
David S. Miller64658742008-03-21 17:01:38 -0700[diff] [blame^]223 sethi %hi(KERNBASE), %l3
224 sethi %hi(kern_locked_tte_data), %l4
225 ldx [%l4 + %lo(kern_locked_tte_data)], %l4
226 clr %l5
227 sethi %hi(num_kernel_image_mappings), %l6
228 lduw [%l6 + %lo(num_kernel_image_mappings)], %l6
229 add %l6, 1, %l6
230
2311:
David S. Miller164c2202006-02-09 22:57:21 -0800[diff] [blame]232 mov HV_FAST_MMU_MAP_PERM_ADDR, %o5
David S. Miller64658742008-03-21 17:01:38 -0700[diff] [blame^]233 sllx %l5, 22, %g2
234 add %l3, %g2, %o0
David S. Miller164c2202006-02-09 22:57:21 -0800[diff] [blame]235 clr %o1
David S. Miller64658742008-03-21 17:01:38 -0700[diff] [blame^]236 add %l4, %g2, %o2
David S. Miller164c2202006-02-09 22:57:21 -0800[diff] [blame]237 mov HV_MMU_IMMU, %o3
David S. Millerd82ace72006-02-09 02:52:44 -0800[diff] [blame]238 ta HV_FAST_TRAP
239
David S. Miller164c2202006-02-09 22:57:21 -0800[diff] [blame]240 mov HV_FAST_MMU_MAP_PERM_ADDR, %o5
David S. Miller64658742008-03-21 17:01:38 -0700[diff] [blame^]241 sllx %l5, 22, %g2
242 add %l3, %g2, %o0
David S. Miller164c2202006-02-09 22:57:21 -0800[diff] [blame]243 clr %o1
David S. Miller64658742008-03-21 17:01:38 -0700[diff] [blame^]244 add %l4, %g2, %o2
David S. Miller164c2202006-02-09 22:57:21 -0800[diff] [blame]245 mov HV_MMU_DMMU, %o3
David S. Millerd82ace72006-02-09 02:52:44 -0800[diff] [blame]246 ta HV_FAST_TRAP
247
David S. Miller64658742008-03-21 17:01:38 -0700[diff] [blame^]248 add %l5, 1, %l5
249 cmp %l5, %l6
250 bne,pt %xcc, 1b
David S. Millerd82ace72006-02-09 02:52:44 -0800[diff] [blame]251 nop
252
David S. Millerd82ace72006-02-09 02:52:44 -0800[diff] [blame]253after_lock_tlb:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]254 wrpr %g0, (PSTATE_PRIV | PSTATE_PEF), %pstate
255 wr %g0, 0, %fprs
256
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]257 wr %g0, ASI_P, %asi
258
259 mov PRIMARY_CONTEXT, %g7
David S. Miller8b11bd12006-02-07 22:13:05 -0800[diff] [blame]260
261661: stxa %g0, [%g7] ASI_DMMU
262 .section .sun4v_1insn_patch, "ax"
263 .word 661b
264 stxa %g0, [%g7] ASI_MMU
265 .previous
266
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]267 membar #Sync
268 mov SECONDARY_CONTEXT, %g7
David S. Miller8b11bd12006-02-07 22:13:05 -0800[diff] [blame]269
270661: stxa %g0, [%g7] ASI_DMMU
271 .section .sun4v_1insn_patch, "ax"
272 .word 661b
273 stxa %g0, [%g7] ASI_MMU
274 .previous
275
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]276 membar #Sync
277
David S. Miller72aff532006-02-17 01:29:17 -0800[diff] [blame]278 /* Everything we do here, until we properly take over the
279 * trap table, must be done with extreme care. We cannot
280 * make any references to %g6 (current thread pointer),
281 * %g4 (current task pointer), or %g5 (base of current cpu's
282 * per-cpu area) until we properly take over the trap table
283 * from the firmware and hypervisor.
284 *
285 * Get onto temporary stack which is in the locked kernel image.
286 */
287 sethi %hi(tramp_stack), %g1
288 or %g1, %lo(tramp_stack), %g1
289 add %g1, TRAMP_STACK_SIZE, %g1
David S. Miller301feb62007-09-16 11:51:15 -0700[diff] [blame]290 sub %g1, STACKFRAME_SZ + STACK_BIAS + 256, %sp
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]291 mov 0, %fp
292
David S. Miller72aff532006-02-17 01:29:17 -0800[diff] [blame]293 /* Put garbage in these registers to trap any access to them. */
294 set 0xdeadbeef, %g4
295 set 0xdeadbeef, %g5
296 set 0xdeadbeef, %g6
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]297
298 call init_irqwork_curcpu
299 nop
David S. Millerac29c112006-02-08 00:08:23 -0800[diff] [blame]300
301 sethi %hi(tlb_type), %g3
302 lduw [%g3 + %lo(tlb_type)], %g2
303 cmp %g2, 3
304 bne,pt %icc, 1f
305 nop
306
David S. Miller72aff532006-02-17 01:29:17 -0800[diff] [blame]307 call hard_smp_processor_id
308 nop
309
David S. Millerb434e712007-08-08 17:32:33 -0700[diff] [blame]310 call sun4v_register_mondo_queues
311 nop
David S. Millerac29c112006-02-08 00:08:23 -0800[diff] [blame]312
3131: call init_cur_cpu_trap
David S. Miller72aff532006-02-17 01:29:17 -0800[diff] [blame]314 ldx [%l0], %o0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]315
David S. Miller0835ae02005-10-04 15:23:20 -0700[diff] [blame]316 /* Start using proper page size encodings in ctx register. */
David S. Miller8b11bd12006-02-07 22:13:05 -0800[diff] [blame]317 sethi %hi(sparc64_kern_pri_context), %g3
318 ldx [%g3 + %lo(sparc64_kern_pri_context)], %g2
319 mov PRIMARY_CONTEXT, %g1
320
321661: stxa %g2, [%g1] ASI_DMMU
322 .section .sun4v_1insn_patch, "ax"
323 .word 661b
324 stxa %g2, [%g1] ASI_MMU
325 .previous
326
327 membar #Sync
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]328
David S. Miller72aff532006-02-17 01:29:17 -0800[diff] [blame]329 wrpr %g0, 0, %wstate
330
331 /* As a hack, put &init_thread_union into %g6.
332 * prom_world() loads from here to restore the %asi
333 * register.
334 */
335 sethi %hi(init_thread_union), %g6
336 or %g6, %lo(init_thread_union), %g6
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]337
David S. Miller12eaa322006-02-10 15:39:51 -0800[diff] [blame]338 sethi %hi(is_sun4v), %o0
339 lduw [%o0 + %lo(is_sun4v)], %o0
340 brz,pt %o0, 1f
341 nop
342
343 TRAP_LOAD_TRAP_BLOCK(%g2, %g3)
344 add %g2, TRAP_PER_CPU_FAULT_INFO, %g2
345 stxa %g2, [%g0] ASI_SCRATCHPAD
346
347 /* Compute physical address:
348 *
349 * paddr = kern_base + (mmfsa_vaddr - KERNBASE)
350 */
351 sethi %hi(KERNBASE), %g3
352 sub %g2, %g3, %g2
353 sethi %hi(kern_base), %g3
354 ldx [%g3 + %lo(kern_base)], %g3
355 add %g2, %g3, %o1
David S. Miller301feb62007-09-16 11:51:15 -0700[diff] [blame]356 sethi %hi(sparc64_ttable_tl0), %o0
David S. Miller12eaa322006-02-10 15:39:51 -0800[diff] [blame]357
David S. Miller301feb62007-09-16 11:51:15 -0700[diff] [blame]358 set prom_set_trap_table_name, %g2
359 stx %g2, [%sp + 2047 + 128 + 0x00]
360 mov 2, %g2
361 stx %g2, [%sp + 2047 + 128 + 0x08]
362 mov 0, %g2
363 stx %g2, [%sp + 2047 + 128 + 0x10]
364 stx %o0, [%sp + 2047 + 128 + 0x18]
365 stx %o1, [%sp + 2047 + 128 + 0x20]
366 sethi %hi(p1275buf), %g2
367 or %g2, %lo(p1275buf), %g2
368 ldx [%g2 + 0x08], %o1
369 call %o1
370 add %sp, (2047 + 128), %o0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]371
David S. Miller12eaa322006-02-10 15:39:51 -0800[diff] [blame]372 ba,pt %xcc, 2f
373 nop
374
David S. Miller301feb62007-09-16 11:51:15 -0700[diff] [blame]3751: sethi %hi(sparc64_ttable_tl0), %o0
376 set prom_set_trap_table_name, %g2
377 stx %g2, [%sp + 2047 + 128 + 0x00]
378 mov 1, %g2
379 stx %g2, [%sp + 2047 + 128 + 0x08]
380 mov 0, %g2
381 stx %g2, [%sp + 2047 + 128 + 0x10]
382 stx %o0, [%sp + 2047 + 128 + 0x18]
383 sethi %hi(p1275buf), %g2
384 or %g2, %lo(p1275buf), %g2
385 ldx [%g2 + 0x08], %o1
386 call %o1
387 add %sp, (2047 + 128), %o0
David S. Miller12eaa322006-02-10 15:39:51 -0800[diff] [blame]388
David S. Miller72aff532006-02-17 01:29:17 -0800[diff] [blame]3892: ldx [%l0], %g6
390 ldx [%g6 + TI_TASK], %g4
391
392 mov 1, %g5
393 sllx %g5, THREAD_SHIFT, %g5
394 sub %g5, (STACKFRAME_SZ + STACK_BIAS), %g5
395 add %g6, %g5, %sp
396 mov 0, %fp
397
398 rdpr %pstate, %o1
399 or %o1, PSTATE_IE, %o1
400 wrpr %o1, 0, %pstate
401
402 call smp_callin
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]403 nop
404 call cpu_idle
405 mov 0, %o0
406 call cpu_panic
407 nop
4081: b,a,pt %xcc, 1b
409
410 .align 8
411sparc64_cpu_startup_end: