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
99 BRANCH_IF_SUN4V(g1, niagara_lock_tlb)
101 sethi %hi(0x80000000), %g2
103 wr %g2, 0, %tick_cmpr
105 /* Call OBP by hand to lock KERNBASE into i/d tlbs.
106 * We lock 2 consequetive entries if we are 'bigkernel'.
108 sethi %hi(prom_entry_lock), %g2
109 1: ldstub [%g2 + %lo(prom_entry_lock)], %g1
110 membar #StoreLoad | #StoreStore
114 sethi %hi(p1275buf), %g2
115 or %g2, %lo(p1275buf), %g2
116 ldx [%g2 + 0x10], %l2
117 add %l2, -(192 + 128), %sp
120 sethi %hi(call_method), %g2
121 or %g2, %lo(call_method), %g2
122 stx %g2, [%sp + 2047 + 128 + 0x00]
124 stx %g2, [%sp + 2047 + 128 + 0x08]
126 stx %g2, [%sp + 2047 + 128 + 0x10]
127 sethi %hi(itlb_load), %g2
128 or %g2, %lo(itlb_load), %g2
129 stx %g2, [%sp + 2047 + 128 + 0x18]
130 sethi %hi(prom_mmu_ihandle_cache), %g2
131 lduw [%g2 + %lo(prom_mmu_ihandle_cache)], %g2
132 stx %g2, [%sp + 2047 + 128 + 0x20]
133 sethi %hi(KERNBASE), %g2
134 stx %g2, [%sp + 2047 + 128 + 0x28]
135 sethi %hi(kern_locked_tte_data), %g2
136 ldx [%g2 + %lo(kern_locked_tte_data)], %g2
137 stx %g2, [%sp + 2047 + 128 + 0x30]
140 BRANCH_IF_ANY_CHEETAH(g1,g5,1f)
144 stx %g2, [%sp + 2047 + 128 + 0x38]
145 sethi %hi(p1275buf), %g2
146 or %g2, %lo(p1275buf), %g2
147 ldx [%g2 + 0x08], %o1
149 add %sp, (2047 + 128), %o0
151 sethi %hi(bigkernel), %g2
152 lduw [%g2 + %lo(bigkernel)], %g2
156 sethi %hi(call_method), %g2
157 or %g2, %lo(call_method), %g2
158 stx %g2, [%sp + 2047 + 128 + 0x00]
160 stx %g2, [%sp + 2047 + 128 + 0x08]
162 stx %g2, [%sp + 2047 + 128 + 0x10]
163 sethi %hi(itlb_load), %g2
164 or %g2, %lo(itlb_load), %g2
165 stx %g2, [%sp + 2047 + 128 + 0x18]
166 sethi %hi(prom_mmu_ihandle_cache), %g2
167 lduw [%g2 + %lo(prom_mmu_ihandle_cache)], %g2
168 stx %g2, [%sp + 2047 + 128 + 0x20]
169 sethi %hi(KERNBASE + 0x400000), %g2
170 stx %g2, [%sp + 2047 + 128 + 0x28]
171 sethi %hi(kern_locked_tte_data), %g2
172 ldx [%g2 + %lo(kern_locked_tte_data)], %g2
173 sethi %hi(0x400000), %g1
175 stx %g2, [%sp + 2047 + 128 + 0x30]
178 BRANCH_IF_ANY_CHEETAH(g1,g5,1f)
182 stx %g2, [%sp + 2047 + 128 + 0x38]
183 sethi %hi(p1275buf), %g2
184 or %g2, %lo(p1275buf), %g2
185 ldx [%g2 + 0x08], %o1
187 add %sp, (2047 + 128), %o0
190 sethi %hi(call_method), %g2
191 or %g2, %lo(call_method), %g2
192 stx %g2, [%sp + 2047 + 128 + 0x00]
194 stx %g2, [%sp + 2047 + 128 + 0x08]
196 stx %g2, [%sp + 2047 + 128 + 0x10]
197 sethi %hi(dtlb_load), %g2
198 or %g2, %lo(dtlb_load), %g2
199 stx %g2, [%sp + 2047 + 128 + 0x18]
200 sethi %hi(prom_mmu_ihandle_cache), %g2
201 lduw [%g2 + %lo(prom_mmu_ihandle_cache)], %g2
202 stx %g2, [%sp + 2047 + 128 + 0x20]
203 sethi %hi(KERNBASE), %g2
204 stx %g2, [%sp + 2047 + 128 + 0x28]
205 sethi %hi(kern_locked_tte_data), %g2
206 ldx [%g2 + %lo(kern_locked_tte_data)], %g2
207 stx %g2, [%sp + 2047 + 128 + 0x30]
210 BRANCH_IF_ANY_CHEETAH(g1,g5,1f)
215 stx %g2, [%sp + 2047 + 128 + 0x38]
216 sethi %hi(p1275buf), %g2
217 or %g2, %lo(p1275buf), %g2
218 ldx [%g2 + 0x08], %o1
220 add %sp, (2047 + 128), %o0
222 sethi %hi(bigkernel), %g2
223 lduw [%g2 + %lo(bigkernel)], %g2
224 brz,pt %g2, do_unlock
227 sethi %hi(call_method), %g2
228 or %g2, %lo(call_method), %g2
229 stx %g2, [%sp + 2047 + 128 + 0x00]
231 stx %g2, [%sp + 2047 + 128 + 0x08]
233 stx %g2, [%sp + 2047 + 128 + 0x10]
234 sethi %hi(dtlb_load), %g2
235 or %g2, %lo(dtlb_load), %g2
236 stx %g2, [%sp + 2047 + 128 + 0x18]
237 sethi %hi(prom_mmu_ihandle_cache), %g2
238 lduw [%g2 + %lo(prom_mmu_ihandle_cache)], %g2
239 stx %g2, [%sp + 2047 + 128 + 0x20]
240 sethi %hi(KERNBASE + 0x400000), %g2
241 stx %g2, [%sp + 2047 + 128 + 0x28]
242 sethi %hi(kern_locked_tte_data), %g2
243 ldx [%g2 + %lo(kern_locked_tte_data)], %g2
244 sethi %hi(0x400000), %g1
246 stx %g2, [%sp + 2047 + 128 + 0x30]
249 BRANCH_IF_ANY_CHEETAH(g1,g5,1f)
254 stx %g2, [%sp + 2047 + 128 + 0x38]
255 sethi %hi(p1275buf), %g2
256 or %g2, %lo(p1275buf), %g2
257 ldx [%g2 + 0x08], %o1
259 add %sp, (2047 + 128), %o0
262 sethi %hi(prom_entry_lock), %g2
263 stb %g0, [%g2 + %lo(prom_entry_lock)]
264 membar #StoreStore | #StoreLoad
266 ba,pt %xcc, after_lock_tlb
270 mov HV_FAST_MMU_MAP_PERM_ADDR, %o5
271 sethi %hi(KERNBASE), %o0
273 sethi %hi(kern_locked_tte_data), %o2
274 ldx [%o2 + %lo(kern_locked_tte_data)], %o2
278 mov HV_FAST_MMU_MAP_PERM_ADDR, %o5
279 sethi %hi(KERNBASE), %o0
281 sethi %hi(kern_locked_tte_data), %o2
282 ldx [%o2 + %lo(kern_locked_tte_data)], %o2
286 sethi %hi(bigkernel), %g2
287 lduw [%g2 + %lo(bigkernel)], %g2
288 brz,pt %g2, after_lock_tlb
291 mov HV_FAST_MMU_MAP_PERM_ADDR, %o5
292 sethi %hi(KERNBASE + 0x400000), %o0
294 sethi %hi(kern_locked_tte_data), %o2
295 ldx [%o2 + %lo(kern_locked_tte_data)], %o2
296 sethi %hi(0x400000), %o3
301 mov HV_FAST_MMU_MAP_PERM_ADDR, %o5
302 sethi %hi(KERNBASE + 0x400000), %o0
304 sethi %hi(kern_locked_tte_data), %o2
305 ldx [%o2 + %lo(kern_locked_tte_data)], %o2
306 sethi %hi(0x400000), %o3
312 wrpr %g0, (PSTATE_PRIV | PSTATE_PEF), %pstate
317 mov PRIMARY_CONTEXT, %g7
319 661: stxa %g0, [%g7] ASI_DMMU
320 .section .sun4v_1insn_patch, "ax"
322 stxa %g0, [%g7] ASI_MMU
326 mov SECONDARY_CONTEXT, %g7
328 661: stxa %g0, [%g7] ASI_DMMU
329 .section .sun4v_1insn_patch, "ax"
331 stxa %g0, [%g7] ASI_MMU
336 /* Everything we do here, until we properly take over the
337 * trap table, must be done with extreme care. We cannot
338 * make any references to %g6 (current thread pointer),
339 * %g4 (current task pointer), or %g5 (base of current cpu's
340 * per-cpu area) until we properly take over the trap table
341 * from the firmware and hypervisor.
343 * Get onto temporary stack which is in the locked kernel image.
345 sethi %hi(tramp_stack), %g1
346 or %g1, %lo(tramp_stack), %g1
347 add %g1, TRAMP_STACK_SIZE, %g1
348 sub %g1, STACKFRAME_SZ + STACK_BIAS, %sp
351 /* Put garbage in these registers to trap any access to them. */
356 call init_irqwork_curcpu
359 sethi %hi(tlb_type), %g3
360 lduw [%g3 + %lo(tlb_type)], %g2
365 call hard_smp_processor_id
368 call sun4v_register_mondo_queues
371 1: call init_cur_cpu_trap
374 /* Start using proper page size encodings in ctx register. */
375 sethi %hi(sparc64_kern_pri_context), %g3
376 ldx [%g3 + %lo(sparc64_kern_pri_context)], %g2
377 mov PRIMARY_CONTEXT, %g1
379 661: stxa %g2, [%g1] ASI_DMMU
380 .section .sun4v_1insn_patch, "ax"
382 stxa %g2, [%g1] ASI_MMU
389 /* As a hack, put &init_thread_union into %g6.
390 * prom_world() loads from here to restore the %asi
393 sethi %hi(init_thread_union), %g6
394 or %g6, %lo(init_thread_union), %g6
396 sethi %hi(is_sun4v), %o0
397 lduw [%o0 + %lo(is_sun4v)], %o0
401 TRAP_LOAD_TRAP_BLOCK(%g2, %g3)
402 add %g2, TRAP_PER_CPU_FAULT_INFO, %g2
403 stxa %g2, [%g0] ASI_SCRATCHPAD
405 /* Compute physical address:
407 * paddr = kern_base + (mmfsa_vaddr - KERNBASE)
409 sethi %hi(KERNBASE), %g3
411 sethi %hi(kern_base), %g3
412 ldx [%g3 + %lo(kern_base)], %g3
415 call prom_set_trap_table_sun4v
416 sethi %hi(sparc64_ttable_tl0), %o0
421 1: call prom_set_trap_table
422 sethi %hi(sparc64_ttable_tl0), %o0
425 ldx [%g6 + TI_TASK], %g4
428 sllx %g5, THREAD_SHIFT, %g5
429 sub %g5, (STACKFRAME_SZ + STACK_BIAS), %g5
434 or %o1, PSTATE_IE, %o1
446 sparc64_cpu_startup_end: