1 /* head.S: Initial boot code for the Sparc64 port of Linux.
3 * Copyright (C) 1996, 1997, 2007 David S. Miller (davem@davemloft.net)
4 * Copyright (C) 1996 David Sitsky (David.Sitsky@anu.edu.au)
5 * Copyright (C) 1997, 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
6 * Copyright (C) 1997 Miguel de Icaza (miguel@nuclecu.unam.mx)
9 #include <linux/version.h>
10 #include <linux/errno.h>
11 #include <linux/threads.h>
12 #include <linux/init.h>
13 #include <linux/linkage.h>
14 #include <asm/thread_info.h>
16 #include <asm/pstate.h>
17 #include <asm/ptrace.h>
18 #include <asm/spitfire.h>
20 #include <asm/pgtable.h>
21 #include <asm/errno.h>
22 #include <asm/signal.h>
23 #include <asm/processor.h>
28 #include <asm/ttable.h>
30 #include <asm/cpudata.h>
32 #include <asm/estate.h>
33 #include <asm/sfafsr.h>
34 #include <asm/unistd.h>
36 /* This section from from _start to sparc64_boot_end should fit into
37 * 0x0000000000404000 to 0x0000000000408000.
40 .globl start, _start, stext, _stext
47 flushw /* Flush register file. */
49 /* This stuff has to be in sync with SILO and other potential boot loaders
50 * Fields should be kept upward compatible and whenever any change is made,
51 * HdrS version should be incremented.
53 .global root_flags, ram_flags, root_dev
54 .global sparc_ramdisk_image, sparc_ramdisk_size
55 .global sparc_ramdisk_image64
58 .word LINUX_VERSION_CODE
62 * 0x0300 : Supports being located at other than 0x4000
63 * 0x0202 : Supports kernel params string
64 * 0x0201 : Supports reboot_command
66 .half 0x0301 /* HdrS version */
80 sparc_ramdisk_image64:
84 /* PROM cif handler code address is in %o4. */
88 /* We need to remap the kernel. Use position independent
89 * code to remap us to KERNBASE.
91 * SILO can invoke us with 32-bit address masking enabled,
92 * so make sure that's clear.
95 andn %g1, PSTATE_AM, %g1
96 wrpr %g1, 0x0, %pstate
99 .globl prom_finddev_name, prom_chosen_path, prom_root_node
100 .globl prom_getprop_name, prom_mmu_name, prom_peer_name
101 .globl prom_callmethod_name, prom_translate_name, prom_root_compatible
102 .globl prom_map_name, prom_unmap_name, prom_mmu_ihandle_cache
103 .globl prom_boot_mapped_pc, prom_boot_mapping_mode
104 .globl prom_boot_mapping_phys_high, prom_boot_mapping_phys_low
105 .globl prom_compatible_name, prom_cpu_path, prom_cpu_compatible
106 .globl is_sun4v, sun4v_chip_type, prom_set_trap_table_name
109 prom_compatible_name:
121 prom_callmethod_name:
129 prom_set_trap_table_name:
130 .asciz "SUNW,set-trap-table"
134 .asciz "SUNW,UltraSPARC-T"
137 prom_sparc64x_prefix:
140 prom_root_compatible:
146 prom_mmu_ihandle_cache:
150 prom_boot_mapping_mode:
153 prom_boot_mapping_phys_high:
155 prom_boot_mapping_phys_low:
160 .word SUN4V_CHIP_INVALID
164 mov (1b - prom_peer_name), %l1
168 /* prom_root_node = prom_peer(0) */
169 stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "peer"
171 stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 1
172 stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1
173 stx %l2, [%sp + 2047 + 128 + 0x18] ! arg1, 0
174 stx %g0, [%sp + 2047 + 128 + 0x20] ! ret1
176 add %sp, (2047 + 128), %o0 ! argument array
178 ldx [%sp + 2047 + 128 + 0x20], %l4 ! prom root node
179 mov (1b - prom_root_node), %l1
183 mov (1b - prom_getprop_name), %l1
184 mov (1b - prom_compatible_name), %l2
185 mov (1b - prom_root_compatible), %l5
190 /* prom_getproperty(prom_root_node, "compatible",
191 * &prom_root_compatible, 64)
193 stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "getprop"
195 stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 4
197 stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1
198 stx %l4, [%sp + 2047 + 128 + 0x18] ! arg1, prom_root_node
199 stx %l2, [%sp + 2047 + 128 + 0x20] ! arg2, "compatible"
200 stx %l5, [%sp + 2047 + 128 + 0x28] ! arg3, &prom_root_compatible
202 stx %l3, [%sp + 2047 + 128 + 0x30] ! arg4, size
203 stx %g0, [%sp + 2047 + 128 + 0x38] ! ret1
205 add %sp, (2047 + 128), %o0 ! argument array
207 mov (1b - prom_finddev_name), %l1
208 mov (1b - prom_chosen_path), %l2
209 mov (1b - prom_boot_mapped_pc), %l3
214 sub %sp, (192 + 128), %sp
216 /* chosen_node = prom_finddevice("/chosen") */
217 stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "finddevice"
219 stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 1
220 stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1
221 stx %l2, [%sp + 2047 + 128 + 0x18] ! arg1, "/chosen"
222 stx %g0, [%sp + 2047 + 128 + 0x20] ! ret1
224 add %sp, (2047 + 128), %o0 ! argument array
226 ldx [%sp + 2047 + 128 + 0x20], %l4 ! chosen device node
228 mov (1b - prom_getprop_name), %l1
229 mov (1b - prom_mmu_name), %l2
230 mov (1b - prom_mmu_ihandle_cache), %l5
235 /* prom_mmu_ihandle_cache = prom_getint(chosen_node, "mmu") */
236 stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "getprop"
238 stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 4
240 stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1
241 stx %l4, [%sp + 2047 + 128 + 0x18] ! arg1, chosen_node
242 stx %l2, [%sp + 2047 + 128 + 0x20] ! arg2, "mmu"
243 stx %l5, [%sp + 2047 + 128 + 0x28] ! arg3, &prom_mmu_ihandle_cache
245 stx %l3, [%sp + 2047 + 128 + 0x30] ! arg4, sizeof(arg3)
246 stx %g0, [%sp + 2047 + 128 + 0x38] ! ret1
248 add %sp, (2047 + 128), %o0 ! argument array
250 mov (1b - prom_callmethod_name), %l1
251 mov (1b - prom_translate_name), %l2
254 lduw [%l5], %l5 ! prom_mmu_ihandle_cache
256 stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "call-method"
258 stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 3
260 stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 5
261 stx %l2, [%sp + 2047 + 128 + 0x18] ! arg1: "translate"
262 stx %l5, [%sp + 2047 + 128 + 0x20] ! arg2: prom_mmu_ihandle_cache
266 stx %l3, [%sp + 2047 + 128 + 0x28] ! arg3: vaddr, our PC
267 stx %g0, [%sp + 2047 + 128 + 0x30] ! res1
268 stx %g0, [%sp + 2047 + 128 + 0x38] ! res2
269 stx %g0, [%sp + 2047 + 128 + 0x40] ! res3
270 stx %g0, [%sp + 2047 + 128 + 0x48] ! res4
271 stx %g0, [%sp + 2047 + 128 + 0x50] ! res5
273 add %sp, (2047 + 128), %o0 ! argument array
275 ldx [%sp + 2047 + 128 + 0x40], %l1 ! translation mode
276 mov (1b - prom_boot_mapping_mode), %l4
279 mov (1b - prom_boot_mapping_phys_high), %l4
281 ldx [%sp + 2047 + 128 + 0x48], %l2 ! physaddr high
283 ldx [%sp + 2047 + 128 + 0x50], %l3 ! physaddr low
285 srlx %l3, ILOG2_4MB, %l3
286 sllx %l3, ILOG2_4MB, %l3
289 /* Leave service as-is, "call-method" */
291 stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 7
293 stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1
294 mov (1b - prom_map_name), %l3
296 stx %l3, [%sp + 2047 + 128 + 0x18] ! arg1: "map"
297 /* Leave arg2 as-is, prom_mmu_ihandle_cache */
299 stx %l3, [%sp + 2047 + 128 + 0x28] ! arg3: mode (-1 default)
300 /* 4MB align the kernel image size. */
301 set (_end - KERNBASE), %l3
302 set ((4 * 1024 * 1024) - 1), %l4
305 stx %l3, [%sp + 2047 + 128 + 0x30] ! arg4: roundup(ksize, 4MB)
306 sethi %hi(KERNBASE), %l3
307 stx %l3, [%sp + 2047 + 128 + 0x38] ! arg5: vaddr (KERNBASE)
308 stx %g0, [%sp + 2047 + 128 + 0x40] ! arg6: empty
309 mov (1b - prom_boot_mapping_phys_low), %l3
312 stx %l3, [%sp + 2047 + 128 + 0x48] ! arg7: phys addr
314 add %sp, (2047 + 128), %o0 ! argument array
316 add %sp, (192 + 128), %sp
318 sethi %hi(prom_root_compatible), %g1
319 or %g1, %lo(prom_root_compatible), %g1
320 sethi %hi(prom_sun4v_name), %g7
321 or %g7, %lo(prom_sun4v_name), %g7
332 sethi %hi(is_sun4v), %g1
333 or %g1, %lo(is_sun4v), %g1
337 /* cpu_node = prom_finddevice("/cpu") */
338 mov (1b - prom_finddev_name), %l1
339 mov (1b - prom_cpu_path), %l2
342 sub %sp, (192 + 128), %sp
344 stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "finddevice"
346 stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 1
347 stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1
348 stx %l2, [%sp + 2047 + 128 + 0x18] ! arg1, "/cpu"
349 stx %g0, [%sp + 2047 + 128 + 0x20] ! ret1
351 add %sp, (2047 + 128), %o0 ! argument array
353 ldx [%sp + 2047 + 128 + 0x20], %l4 ! cpu device node
355 mov (1b - prom_getprop_name), %l1
356 mov (1b - prom_compatible_name), %l2
357 mov (1b - prom_cpu_compatible), %l5
362 /* prom_getproperty(cpu_node, "compatible",
363 * &prom_cpu_compatible, 64)
365 stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "getprop"
367 stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 4
369 stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1
370 stx %l4, [%sp + 2047 + 128 + 0x18] ! arg1, cpu_node
371 stx %l2, [%sp + 2047 + 128 + 0x20] ! arg2, "compatible"
372 stx %l5, [%sp + 2047 + 128 + 0x28] ! arg3, &prom_cpu_compatible
374 stx %l3, [%sp + 2047 + 128 + 0x30] ! arg4, size
375 stx %g0, [%sp + 2047 + 128 + 0x38] ! ret1
377 add %sp, (2047 + 128), %o0 ! argument array
379 add %sp, (192 + 128), %sp
381 sethi %hi(prom_cpu_compatible), %g1
382 or %g1, %lo(prom_cpu_compatible), %g1
383 sethi %hi(prom_niagara_prefix), %g7
384 or %g7, %lo(prom_niagara_prefix), %g7
397 89: sethi %hi(prom_cpu_compatible), %g1
398 or %g1, %lo(prom_cpu_compatible), %g1
399 sethi %hi(prom_sparc_prefix), %g7
400 or %g7, %lo(prom_sparc_prefix), %g7
411 sethi %hi(prom_cpu_compatible), %g1
412 or %g1, %lo(prom_cpu_compatible), %g1
420 70: ldub [%g1 + 7], %g2
423 mov SUN4V_CHIP_NIAGARA3, %g4
426 mov SUN4V_CHIP_NIAGARA4, %g4
429 mov SUN4V_CHIP_NIAGARA5, %g4
432 mov SUN4V_CHIP_SPARC_M6, %g4
435 mov SUN4V_CHIP_SPARC_M7, %g4
439 91: sethi %hi(prom_cpu_compatible), %g1
440 or %g1, %lo(prom_cpu_compatible), %g1
444 mov SUN4V_CHIP_NIAGARA1, %g4
447 mov SUN4V_CHIP_NIAGARA2, %g4
451 sethi %hi(prom_cpu_compatible), %g1
452 or %g1, %lo(prom_cpu_compatible), %g1
453 sethi %hi(prom_sparc64x_prefix), %g7
454 or %g7, %lo(prom_sparc64x_prefix), %g7
465 mov SUN4V_CHIP_SPARC64X, %g4
468 mov SUN4V_CHIP_UNKNOWN, %g4
469 5: sethi %hi(sun4v_chip_type), %g2
470 or %g2, %lo(sun4v_chip_type), %g2
474 BRANCH_IF_SUN4V(g1, jump_to_sun4u_init)
475 BRANCH_IF_CHEETAH_BASE(g1,g7,cheetah_boot)
476 BRANCH_IF_CHEETAH_PLUS_OR_FOLLOWON(g1,g7,cheetah_plus_boot)
477 ba,pt %xcc, spitfire_boot
481 /* Preserve OBP chosen DCU and DCR register settings. */
482 ba,pt %xcc, cheetah_generic_boot
486 mov DCR_BPE | DCR_RPE | DCR_SI | DCR_IFPOE | DCR_MS, %g1
489 sethi %uhi(DCU_ME|DCU_RE|DCU_HPE|DCU_SPE|DCU_SL|DCU_WE), %g7
490 or %g7, %ulo(DCU_ME|DCU_RE|DCU_HPE|DCU_SPE|DCU_SL|DCU_WE), %g7
492 or %g7, DCU_DM | DCU_IM | DCU_DC | DCU_IC, %g7
493 stxa %g7, [%g0] ASI_DCU_CONTROL_REG
496 cheetah_generic_boot:
497 mov TSB_EXTENSION_P, %g3
498 stxa %g0, [%g3] ASI_DMMU
499 stxa %g0, [%g3] ASI_IMMU
502 mov TSB_EXTENSION_S, %g3
503 stxa %g0, [%g3] ASI_DMMU
506 mov TSB_EXTENSION_N, %g3
507 stxa %g0, [%g3] ASI_DMMU
508 stxa %g0, [%g3] ASI_IMMU
511 ba,a,pt %xcc, jump_to_sun4u_init
514 /* Typically PROM has already enabled both MMU's and both on-chip
515 * caches, but we do it here anyway just to be paranoid.
517 mov (LSU_CONTROL_IC|LSU_CONTROL_DC|LSU_CONTROL_IM|LSU_CONTROL_DM), %g1
518 stxa %g1, [%g0] ASI_LSU_CONTROL
523 * Make sure we are in privileged mode, have address masking,
524 * using the ordinary globals and have enabled floating
527 * Again, typically PROM has left %pil at 13 or similar, and
528 * (PSTATE_PRIV | PSTATE_PEF | PSTATE_IE) in %pstate.
530 wrpr %g0, (PSTATE_PRIV|PSTATE_PEF|PSTATE_IE), %pstate
539 BRANCH_IF_SUN4V(g1, sun4v_init)
542 mov PRIMARY_CONTEXT, %g7
543 stxa %g0, [%g7] ASI_DMMU
546 mov SECONDARY_CONTEXT, %g7
547 stxa %g0, [%g7] ASI_DMMU
550 ba,a,pt %xcc, sun4u_continue
554 mov PRIMARY_CONTEXT, %g7
555 stxa %g0, [%g7] ASI_MMU
558 mov SECONDARY_CONTEXT, %g7
559 stxa %g0, [%g7] ASI_MMU
561 ba,a,pt %xcc, niagara_tlb_fixup
564 BRANCH_IF_ANY_CHEETAH(g1, g7, cheetah_tlb_fixup)
566 ba,a,pt %xcc, spitfire_tlb_fixup
569 mov 3, %g2 /* Set TLB type to hypervisor. */
570 sethi %hi(tlb_type), %g1
571 stw %g2, [%g1 + %lo(tlb_type)]
573 /* Patch copy/clear ops. */
574 sethi %hi(sun4v_chip_type), %g1
575 lduw [%g1 + %lo(sun4v_chip_type)], %g1
576 cmp %g1, SUN4V_CHIP_NIAGARA1
577 be,pt %xcc, niagara_patch
578 cmp %g1, SUN4V_CHIP_NIAGARA2
579 be,pt %xcc, niagara2_patch
581 cmp %g1, SUN4V_CHIP_NIAGARA3
582 be,pt %xcc, niagara2_patch
584 cmp %g1, SUN4V_CHIP_NIAGARA4
585 be,pt %xcc, niagara4_patch
587 cmp %g1, SUN4V_CHIP_NIAGARA5
588 be,pt %xcc, niagara4_patch
590 cmp %g1, SUN4V_CHIP_SPARC_M6
591 be,pt %xcc, niagara4_patch
593 cmp %g1, SUN4V_CHIP_SPARC_M7
594 be,pt %xcc, niagara4_patch
597 call generic_patch_copyops
599 call generic_patch_bzero
601 call generic_patch_pageops
606 call niagara4_patch_copyops
608 call niagara4_patch_bzero
610 call niagara4_patch_pageops
616 call niagara2_patch_copyops
618 call niagara_patch_bzero
620 call niagara_patch_pageops
626 call niagara_patch_copyops
628 call niagara_patch_bzero
630 call niagara_patch_pageops
634 /* Patch TLB/cache ops. */
635 call hypervisor_patch_cachetlbops
638 ba,a,pt %xcc, tlb_fixup_done
641 mov 2, %g2 /* Set TLB type to cheetah+. */
642 BRANCH_IF_CHEETAH_PLUS_OR_FOLLOWON(g1,g7,1f)
644 mov 1, %g2 /* Set TLB type to cheetah. */
646 1: sethi %hi(tlb_type), %g1
647 stw %g2, [%g1 + %lo(tlb_type)]
649 /* Patch copy/page operations to cheetah optimized versions. */
650 call cheetah_patch_copyops
652 call cheetah_patch_copy_page
654 call cheetah_patch_cachetlbops
657 ba,a,pt %xcc, tlb_fixup_done
660 /* Set TLB type to spitfire. */
662 sethi %hi(tlb_type), %g1
663 stw %g2, [%g1 + %lo(tlb_type)]
666 sethi %hi(init_thread_union), %g6
667 or %g6, %lo(init_thread_union), %g6
668 ldx [%g6 + TI_TASK], %g4
672 sllx %g1, THREAD_SHIFT, %g1
673 sub %g1, (STACKFRAME_SZ + STACK_BIAS), %g1
676 /* Set per-cpu pointer initially to zero, this makes
677 * the boot-cpu use the in-kernel-image per-cpu areas
678 * before setup_per_cpu_area() is invoked.
686 sethi %hi(__bss_start), %o0
687 or %o0, %lo(__bss_start), %o0
689 or %o1, %lo(_end), %o1
693 #ifdef CONFIG_LOCKDEP
694 /* We have this call this super early, as even prom_init can grab
695 * spinlocks and thus call into the lockdep code.
702 mov %l7, %o0 ! OpenPROM cif handler
704 /* To create a one-register-window buffer between the kernel's
705 * initial stack and the last stack frame we use from the firmware,
706 * do the rest of the boot from a C helper function.
708 call start_early_boot
714 /* This is meant to allow the sharing of this code between
715 * boot processor invocation (via setup_tba() below) and
716 * secondary processor startup (via trampoline.S). The
717 * former does use this code, the latter does not yet due
718 * to some complexities. That should be fixed up at some
721 * There used to be enormous complexity wrt. transferring
722 * over from the firmware's trap table to the Linux kernel's.
723 * For example, there was a chicken & egg problem wrt. building
724 * the OBP page tables, yet needing to be on the Linux kernel
725 * trap table (to translate PAGE_OFFSET addresses) in order to
728 * We now handle OBP tlb misses differently, via linear lookups
729 * into the prom_trans[] array. So that specific problem no
730 * longer exists. Yet, unfortunately there are still some issues
731 * preventing trampoline.S from using this code... ho hum.
733 .globl setup_trap_table
737 /* Force interrupts to be disabled. */
739 andn %l0, PSTATE_IE, %o1
740 wrpr %o1, 0x0, %pstate
742 wrpr %g0, PIL_NORMAL_MAX, %pil
744 /* Make the firmware call to jump over to the Linux trap table. */
745 sethi %hi(is_sun4v), %o0
746 lduw [%o0 + %lo(is_sun4v)], %o0
750 TRAP_LOAD_TRAP_BLOCK(%g2, %g3)
751 add %g2, TRAP_PER_CPU_FAULT_INFO, %g2
752 stxa %g2, [%g0] ASI_SCRATCHPAD
754 /* Compute physical address:
756 * paddr = kern_base + (mmfsa_vaddr - KERNBASE)
758 sethi %hi(KERNBASE), %g3
760 sethi %hi(kern_base), %g3
761 ldx [%g3 + %lo(kern_base)], %g3
763 sethi %hi(sparc64_ttable_tl0), %o0
765 set prom_set_trap_table_name, %g2
766 stx %g2, [%sp + 2047 + 128 + 0x00]
768 stx %g2, [%sp + 2047 + 128 + 0x08]
770 stx %g2, [%sp + 2047 + 128 + 0x10]
771 stx %o0, [%sp + 2047 + 128 + 0x18]
772 stx %o1, [%sp + 2047 + 128 + 0x20]
773 sethi %hi(p1275buf), %g2
774 or %g2, %lo(p1275buf), %g2
775 ldx [%g2 + 0x08], %o1
777 add %sp, (2047 + 128), %o0
781 1: sethi %hi(sparc64_ttable_tl0), %o0
782 set prom_set_trap_table_name, %g2
783 stx %g2, [%sp + 2047 + 128 + 0x00]
785 stx %g2, [%sp + 2047 + 128 + 0x08]
787 stx %g2, [%sp + 2047 + 128 + 0x10]
788 stx %o0, [%sp + 2047 + 128 + 0x18]
789 sethi %hi(p1275buf), %g2
790 or %g2, %lo(p1275buf), %g2
791 ldx [%g2 + 0x08], %o1
793 add %sp, (2047 + 128), %o0
795 /* Start using proper page size encodings in ctx register. */
796 2: sethi %hi(sparc64_kern_pri_context), %g3
797 ldx [%g3 + %lo(sparc64_kern_pri_context)], %g2
799 mov PRIMARY_CONTEXT, %g1
801 661: stxa %g2, [%g1] ASI_DMMU
802 .section .sun4v_1insn_patch, "ax"
804 stxa %g2, [%g1] ASI_MMU
809 BRANCH_IF_SUN4V(o2, 1f)
811 /* Kill PROM timer */
812 sethi %hi(0x80000000), %o2
814 wr %o2, 0, %tick_cmpr
816 BRANCH_IF_ANY_CHEETAH(o2, o3, 1f)
820 /* Disable STICK_INT interrupts. */
822 sethi %hi(0x80000000), %o2
827 wrpr %g0, %g0, %wstate
829 call init_irqwork_curcpu
832 /* Now we can restore interrupt state. */
843 /* The boot processor is the only cpu which invokes this
844 * routine, the other cpus set things up via trampoline.S.
845 * So save the OBP trap table address here.
848 sethi %hi(prom_tba), %o1
849 or %o1, %lo(prom_tba), %o1
852 call setup_trap_table
859 #include "etrap_64.S"
860 #include "rtrap_64.S"
861 #include "winfixup.S"
862 #include "fpu_traps.S"
864 #include "getsetcc.S"
866 #include "spiterrs.S"
868 #include "misctrap.S"
869 #include "syscalls.S"
872 #include "sun4v_tlb_miss.S"
873 #include "sun4v_ivec.S"
878 * The following skip makes sure the trap table in ttable.S is aligned
879 * on a 32K boundary as required by the v9 specs for TBA register.
881 * We align to a 32K boundary, then we have the 32K kernel TSB,
882 * the 64K kernel 4MB TSB, and then the 32K aligned trap table.
885 .skip 0x4000 + _start - 1b
893 .globl swapper_4m_tsb
899 /* Some care needs to be exercised if you try to move the
900 * location of the trap table relative to other things. For
901 * one thing there are br* instructions in some of the
902 * trap table entires which branch back to code in ktlb.S
903 * Those instructions can only handle a signed 16-bit
906 * There is a binutils bug (bugzilla #4558) which causes
907 * the relocation overflow checks for such instructions to
908 * not be done correctly. So bintuils will not notice the
909 * error and will instead write junk into the relocation and
910 * you'll have an unbootable kernel.
912 #include "ttable_64.S"
916 #include "systbls_64.S"
920 .globl prom_tba, tlb_type
922 tlb_type: .word 0 /* Must NOT end up in BSS */
923 .section ".fixup",#alloc,#execinstr
928 ENDPROC(__retl_efault)