1 /* $Id: trampoline.S,v 1.26 2002/02/09 19:49:30 davem Exp $
2 * trampoline.S: Jump start slave processors on sparc64.
4 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
12 #include <asm/pstate.h>
14 #include <asm/pgtable.h>
15 #include <asm/spitfire.h>
16 #include <asm/processor.h>
17 #include <asm/thread_info.h>
19 #include <asm/hypervisor.h>
20 #include <asm/cpudata.h>
28 .asciz "SUNW,itlb-load"
31 .asciz "SUNW,dtlb-load"
33 /* XXX __cpuinit this thing XXX */
34 #define TRAMP_STACK_SIZE 1024
37 .skip TRAMP_STACK_SIZE
41 .globl sparc64_cpu_startup, sparc64_cpu_startup_end
43 BRANCH_IF_SUN4V(g1, niagara_startup)
44 BRANCH_IF_CHEETAH_BASE(g1, g5, cheetah_startup)
45 BRANCH_IF_CHEETAH_PLUS_OR_FOLLOWON(g1, g5, cheetah_plus_startup)
47 ba,pt %xcc, spitfire_startup
51 /* Preserve OBP chosen DCU and DCR register settings. */
52 ba,pt %xcc, cheetah_generic_startup
56 mov DCR_BPE | DCR_RPE | DCR_SI | DCR_IFPOE | DCR_MS, %g1
59 sethi %uhi(DCU_ME|DCU_RE|DCU_HPE|DCU_SPE|DCU_SL|DCU_WE), %g5
60 or %g5, %ulo(DCU_ME|DCU_RE|DCU_HPE|DCU_SPE|DCU_SL|DCU_WE), %g5
62 or %g5, DCU_DM | DCU_IM | DCU_DC | DCU_IC, %g5
63 stxa %g5, [%g0] ASI_DCU_CONTROL_REG
67 cheetah_generic_startup:
68 mov TSB_EXTENSION_P, %g3
69 stxa %g0, [%g3] ASI_DMMU
70 stxa %g0, [%g3] ASI_IMMU
73 mov TSB_EXTENSION_S, %g3
74 stxa %g0, [%g3] ASI_DMMU
77 mov TSB_EXTENSION_N, %g3
78 stxa %g0, [%g3] ASI_DMMU
79 stxa %g0, [%g3] ASI_IMMU
84 /* Disable STICK_INT interrupts. */
85 sethi %hi(0x80000000), %g5
89 ba,pt %xcc, startup_continue
93 mov (LSU_CONTROL_IC | LSU_CONTROL_DC | LSU_CONTROL_IM | LSU_CONTROL_DM), %g1
94 stxa %g1, [%g0] ASI_LSU_CONTROL
98 sethi %hi(0x80000000), %g2
100 wr %g2, 0, %tick_cmpr
104 BRANCH_IF_SUN4V(g1, niagara_lock_tlb)
106 /* Call OBP by hand to lock KERNBASE into i/d tlbs.
107 * We lock 2 consequetive entries if we are 'bigkernel'.
109 sethi %hi(prom_entry_lock), %g2
110 1: ldstub [%g2 + %lo(prom_entry_lock)], %g1
111 membar #StoreLoad | #StoreStore
115 sethi %hi(p1275buf), %g2
116 or %g2, %lo(p1275buf), %g2
117 ldx [%g2 + 0x10], %l2
118 add %l2, -(192 + 128), %sp
121 sethi %hi(call_method), %g2
122 or %g2, %lo(call_method), %g2
123 stx %g2, [%sp + 2047 + 128 + 0x00]
125 stx %g2, [%sp + 2047 + 128 + 0x08]
127 stx %g2, [%sp + 2047 + 128 + 0x10]
128 sethi %hi(itlb_load), %g2
129 or %g2, %lo(itlb_load), %g2
130 stx %g2, [%sp + 2047 + 128 + 0x18]
131 sethi %hi(prom_mmu_ihandle_cache), %g2
132 lduw [%g2 + %lo(prom_mmu_ihandle_cache)], %g2
133 stx %g2, [%sp + 2047 + 128 + 0x20]
134 sethi %hi(KERNBASE), %g2
135 stx %g2, [%sp + 2047 + 128 + 0x28]
136 sethi %hi(kern_locked_tte_data), %g2
137 ldx [%g2 + %lo(kern_locked_tte_data)], %g2
138 stx %g2, [%sp + 2047 + 128 + 0x30]
141 BRANCH_IF_ANY_CHEETAH(g1,g5,1f)
145 stx %g2, [%sp + 2047 + 128 + 0x38]
146 sethi %hi(p1275buf), %g2
147 or %g2, %lo(p1275buf), %g2
148 ldx [%g2 + 0x08], %o1
150 add %sp, (2047 + 128), %o0
152 sethi %hi(bigkernel), %g2
153 lduw [%g2 + %lo(bigkernel)], %g2
157 sethi %hi(call_method), %g2
158 or %g2, %lo(call_method), %g2
159 stx %g2, [%sp + 2047 + 128 + 0x00]
161 stx %g2, [%sp + 2047 + 128 + 0x08]
163 stx %g2, [%sp + 2047 + 128 + 0x10]
164 sethi %hi(itlb_load), %g2
165 or %g2, %lo(itlb_load), %g2
166 stx %g2, [%sp + 2047 + 128 + 0x18]
167 sethi %hi(prom_mmu_ihandle_cache), %g2
168 lduw [%g2 + %lo(prom_mmu_ihandle_cache)], %g2
169 stx %g2, [%sp + 2047 + 128 + 0x20]
170 sethi %hi(KERNBASE + 0x400000), %g2
171 stx %g2, [%sp + 2047 + 128 + 0x28]
172 sethi %hi(kern_locked_tte_data), %g2
173 ldx [%g2 + %lo(kern_locked_tte_data)], %g2
174 sethi %hi(0x400000), %g1
176 stx %g2, [%sp + 2047 + 128 + 0x30]
179 BRANCH_IF_ANY_CHEETAH(g1,g5,1f)
183 stx %g2, [%sp + 2047 + 128 + 0x38]
184 sethi %hi(p1275buf), %g2
185 or %g2, %lo(p1275buf), %g2
186 ldx [%g2 + 0x08], %o1
188 add %sp, (2047 + 128), %o0
191 sethi %hi(call_method), %g2
192 or %g2, %lo(call_method), %g2
193 stx %g2, [%sp + 2047 + 128 + 0x00]
195 stx %g2, [%sp + 2047 + 128 + 0x08]
197 stx %g2, [%sp + 2047 + 128 + 0x10]
198 sethi %hi(dtlb_load), %g2
199 or %g2, %lo(dtlb_load), %g2
200 stx %g2, [%sp + 2047 + 128 + 0x18]
201 sethi %hi(prom_mmu_ihandle_cache), %g2
202 lduw [%g2 + %lo(prom_mmu_ihandle_cache)], %g2
203 stx %g2, [%sp + 2047 + 128 + 0x20]
204 sethi %hi(KERNBASE), %g2
205 stx %g2, [%sp + 2047 + 128 + 0x28]
206 sethi %hi(kern_locked_tte_data), %g2
207 ldx [%g2 + %lo(kern_locked_tte_data)], %g2
208 stx %g2, [%sp + 2047 + 128 + 0x30]
211 BRANCH_IF_ANY_CHEETAH(g1,g5,1f)
216 stx %g2, [%sp + 2047 + 128 + 0x38]
217 sethi %hi(p1275buf), %g2
218 or %g2, %lo(p1275buf), %g2
219 ldx [%g2 + 0x08], %o1
221 add %sp, (2047 + 128), %o0
223 sethi %hi(bigkernel), %g2
224 lduw [%g2 + %lo(bigkernel)], %g2
225 brz,pt %g2, do_unlock
228 sethi %hi(call_method), %g2
229 or %g2, %lo(call_method), %g2
230 stx %g2, [%sp + 2047 + 128 + 0x00]
232 stx %g2, [%sp + 2047 + 128 + 0x08]
234 stx %g2, [%sp + 2047 + 128 + 0x10]
235 sethi %hi(dtlb_load), %g2
236 or %g2, %lo(dtlb_load), %g2
237 stx %g2, [%sp + 2047 + 128 + 0x18]
238 sethi %hi(prom_mmu_ihandle_cache), %g2
239 lduw [%g2 + %lo(prom_mmu_ihandle_cache)], %g2
240 stx %g2, [%sp + 2047 + 128 + 0x20]
241 sethi %hi(KERNBASE + 0x400000), %g2
242 stx %g2, [%sp + 2047 + 128 + 0x28]
243 sethi %hi(kern_locked_tte_data), %g2
244 ldx [%g2 + %lo(kern_locked_tte_data)], %g2
245 sethi %hi(0x400000), %g1
247 stx %g2, [%sp + 2047 + 128 + 0x30]
250 BRANCH_IF_ANY_CHEETAH(g1,g5,1f)
255 stx %g2, [%sp + 2047 + 128 + 0x38]
256 sethi %hi(p1275buf), %g2
257 or %g2, %lo(p1275buf), %g2
258 ldx [%g2 + 0x08], %o1
260 add %sp, (2047 + 128), %o0
263 sethi %hi(prom_entry_lock), %g2
264 stb %g0, [%g2 + %lo(prom_entry_lock)]
265 membar #StoreStore | #StoreLoad
267 ba,pt %xcc, after_lock_tlb
271 mov HV_FAST_MMU_MAP_PERM_ADDR, %o5
272 sethi %hi(KERNBASE), %o0
274 sethi %hi(kern_locked_tte_data), %o2
275 ldx [%o2 + %lo(kern_locked_tte_data)], %o2
279 mov HV_FAST_MMU_MAP_PERM_ADDR, %o5
280 sethi %hi(KERNBASE), %o0
282 sethi %hi(kern_locked_tte_data), %o2
283 ldx [%o2 + %lo(kern_locked_tte_data)], %o2
287 sethi %hi(bigkernel), %g2
288 lduw [%g2 + %lo(bigkernel)], %g2
289 brz,pt %g2, after_lock_tlb
292 mov HV_FAST_MMU_MAP_PERM_ADDR, %o5
293 sethi %hi(KERNBASE + 0x400000), %o0
295 sethi %hi(kern_locked_tte_data), %o2
296 ldx [%o2 + %lo(kern_locked_tte_data)], %o2
297 sethi %hi(0x400000), %o3
302 mov HV_FAST_MMU_MAP_PERM_ADDR, %o5
303 sethi %hi(KERNBASE + 0x400000), %o0
305 sethi %hi(kern_locked_tte_data), %o2
306 ldx [%o2 + %lo(kern_locked_tte_data)], %o2
307 sethi %hi(0x400000), %o3
313 wrpr %g0, (PSTATE_PRIV | PSTATE_PEF), %pstate
318 mov PRIMARY_CONTEXT, %g7
320 661: stxa %g0, [%g7] ASI_DMMU
321 .section .sun4v_1insn_patch, "ax"
323 stxa %g0, [%g7] ASI_MMU
327 mov SECONDARY_CONTEXT, %g7
329 661: stxa %g0, [%g7] ASI_DMMU
330 .section .sun4v_1insn_patch, "ax"
332 stxa %g0, [%g7] ASI_MMU
337 /* Everything we do here, until we properly take over the
338 * trap table, must be done with extreme care. We cannot
339 * make any references to %g6 (current thread pointer),
340 * %g4 (current task pointer), or %g5 (base of current cpu's
341 * per-cpu area) until we properly take over the trap table
342 * from the firmware and hypervisor.
344 * Get onto temporary stack which is in the locked kernel image.
346 sethi %hi(tramp_stack), %g1
347 or %g1, %lo(tramp_stack), %g1
348 add %g1, TRAMP_STACK_SIZE, %g1
349 sub %g1, STACKFRAME_SZ + STACK_BIAS, %sp
352 /* Put garbage in these registers to trap any access to them. */
357 call init_irqwork_curcpu
360 sethi %hi(tlb_type), %g3
361 lduw [%g3 + %lo(tlb_type)], %g2
366 call hard_smp_processor_id
372 call sun4v_init_mondo_queues
375 1: call init_cur_cpu_trap
378 /* Start using proper page size encodings in ctx register. */
379 sethi %hi(sparc64_kern_pri_context), %g3
380 ldx [%g3 + %lo(sparc64_kern_pri_context)], %g2
381 mov PRIMARY_CONTEXT, %g1
383 661: stxa %g2, [%g1] ASI_DMMU
384 .section .sun4v_1insn_patch, "ax"
386 stxa %g2, [%g1] ASI_MMU
393 /* As a hack, put &init_thread_union into %g6.
394 * prom_world() loads from here to restore the %asi
397 sethi %hi(init_thread_union), %g6
398 or %g6, %lo(init_thread_union), %g6
400 sethi %hi(is_sun4v), %o0
401 lduw [%o0 + %lo(is_sun4v)], %o0
405 TRAP_LOAD_TRAP_BLOCK(%g2, %g3)
406 add %g2, TRAP_PER_CPU_FAULT_INFO, %g2
407 stxa %g2, [%g0] ASI_SCRATCHPAD
409 /* Compute physical address:
411 * paddr = kern_base + (mmfsa_vaddr - KERNBASE)
413 sethi %hi(KERNBASE), %g3
415 sethi %hi(kern_base), %g3
416 ldx [%g3 + %lo(kern_base)], %g3
419 call prom_set_trap_table_sun4v
420 sethi %hi(sparc64_ttable_tl0), %o0
425 1: call prom_set_trap_table
426 sethi %hi(sparc64_ttable_tl0), %o0
429 ldx [%g6 + TI_TASK], %g4
432 sllx %g5, THREAD_SHIFT, %g5
433 sub %g5, (STACKFRAME_SZ + STACK_BIAS), %g5
438 or %o1, PSTATE_IE, %o1
450 sparc64_cpu_startup_end: