machdep.c

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    1 /*-
    2  * Copyright (c) 2001 Jake Burkholder.
    3  * Copyright (c) 1992 Terrence R. Lambert.
    4  * Copyright (c) 1982, 1987, 1990 The Regents of the University of California.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to Berkeley by
    8  * William Jolitz.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 4. Neither the name of the University nor the names of its contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  *
   34  *      from: @(#)machdep.c     7.4 (Berkeley) 6/3/91
   35  *      from: FreeBSD: src/sys/i386/i386/machdep.c,v 1.477 2001/08/27
   36  */
   37 
   38 #include <sys/cdefs.h>
   39 __FBSDID("$FreeBSD: releng/8.1/sys/sparc64/sparc64/machdep.c 207890 2010-05-10 20:25:51Z marius $");
   40 
   41 #include "opt_compat.h"
   42 #include "opt_ddb.h"
   43 #include "opt_kstack_pages.h"
   44 #include "opt_msgbuf.h"
   45 
   46 #include <sys/param.h>
   47 #include <sys/malloc.h>
   48 #include <sys/proc.h>
   49 #include <sys/systm.h>
   50 #include <sys/bio.h>
   51 #include <sys/buf.h>
   52 #include <sys/bus.h>
   53 #include <sys/cpu.h>
   54 #include <sys/cons.h>
   55 #include <sys/eventhandler.h>
   56 #include <sys/exec.h>
   57 #include <sys/imgact.h>
   58 #include <sys/interrupt.h>
   59 #include <sys/kdb.h>
   60 #include <sys/kernel.h>
   61 #include <sys/ktr.h>
   62 #include <sys/linker.h>
   63 #include <sys/lock.h>
   64 #include <sys/msgbuf.h>
   65 #include <sys/mutex.h>
   66 #include <sys/pcpu.h>
   67 #include <sys/ptrace.h>
   68 #include <sys/reboot.h>
   69 #include <sys/signalvar.h>
   70 #include <sys/smp.h>
   71 #include <sys/sysent.h>
   72 #include <sys/sysproto.h>
   73 #include <sys/timetc.h>
   74 #include <sys/ucontext.h>
   75 
   76 #include <dev/ofw/openfirm.h>
   77 
   78 #include <vm/vm.h>
   79 #include <vm/vm_extern.h>
   80 #include <vm/vm_kern.h>
   81 #include <vm/vm_page.h>
   82 #include <vm/vm_map.h>
   83 #include <vm/vm_object.h>
   84 #include <vm/vm_pager.h>
   85 #include <vm/vm_param.h>
   86 
   87 #include <ddb/ddb.h>
   88 
   89 #include <machine/bus.h>
   90 #include <machine/cache.h>
   91 #include <machine/clock.h>
   92 #include <machine/cmt.h>
   93 #include <machine/cpu.h>
   94 #include <machine/fireplane.h>
   95 #include <machine/fp.h>
   96 #include <machine/fsr.h>
   97 #include <machine/intr_machdep.h>
   98 #include <machine/jbus.h>
   99 #include <machine/md_var.h>
  100 #include <machine/metadata.h>
  101 #include <machine/ofw_machdep.h>
  102 #include <machine/ofw_mem.h>
  103 #include <machine/pcb.h>
  104 #include <machine/pmap.h>
  105 #include <machine/pstate.h>
  106 #include <machine/reg.h>
  107 #include <machine/sigframe.h>
  108 #include <machine/smp.h>
  109 #include <machine/tick.h>
  110 #include <machine/tlb.h>
  111 #include <machine/tstate.h>
  112 #include <machine/upa.h>
  113 #include <machine/ver.h>
  114 
  115 typedef int ofw_vec_t(void *);
  116 
  117 #ifdef DDB
  118 extern vm_offset_t ksym_start, ksym_end;
  119 #endif
  120 
  121 int dtlb_slots;
  122 int itlb_slots;
  123 struct tlb_entry *kernel_tlbs;
  124 int kernel_tlb_slots;
  125 
  126 int cold = 1;
  127 long Maxmem;
  128 long realmem;
  129 
  130 void *dpcpu0;
  131 char pcpu0[PCPU_PAGES * PAGE_SIZE];
  132 struct trapframe frame0;
  133 
  134 vm_offset_t kstack0;
  135 vm_paddr_t kstack0_phys;
  136 
  137 struct kva_md_info kmi;
  138 
  139 u_long ofw_vec;
  140 u_long ofw_tba;
  141 u_int tba_taken_over;
  142 
  143 char sparc64_model[32];
  144 
  145 static int cpu_use_vis = 1;
  146 
  147 cpu_block_copy_t *cpu_block_copy;
  148 cpu_block_zero_t *cpu_block_zero;
  149 
  150 static phandle_t find_bsp(phandle_t node, uint32_t bspid, u_int cpu_impl);
  151 void sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3,
  152     ofw_vec_t *vec);
  153 static void sparc64_shutdown_final(void *dummy, int howto);
  154 
  155 static void cpu_startup(void *arg);
  156 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
  157 
  158 CTASSERT((1 << INT_SHIFT) == sizeof(int));
  159 CTASSERT((1 << PTR_SHIFT) == sizeof(char *));
  160 
  161 CTASSERT(sizeof(struct reg) == 256);
  162 CTASSERT(sizeof(struct fpreg) == 272);
  163 CTASSERT(sizeof(struct __mcontext) == 512);
  164 
  165 CTASSERT((sizeof(struct pcb) & (64 - 1)) == 0);
  166 CTASSERT((offsetof(struct pcb, pcb_kfp) & (64 - 1)) == 0);
  167 CTASSERT((offsetof(struct pcb, pcb_ufp) & (64 - 1)) == 0);
  168 CTASSERT(sizeof(struct pcb) <= ((KSTACK_PAGES * PAGE_SIZE) / 8));
  169 
  170 CTASSERT(sizeof(struct pcpu) <= ((PCPU_PAGES * PAGE_SIZE) / 2));
  171 
  172 static void
  173 cpu_startup(void *arg)
  174 {
  175         vm_paddr_t physsz;
  176         int i;
  177 
  178         physsz = 0;
  179         for (i = 0; i < sparc64_nmemreg; i++)
  180                 physsz += sparc64_memreg[i].mr_size;
  181         printf("real memory  = %lu (%lu MB)\n", physsz,
  182             physsz / (1024 * 1024));
  183         realmem = (long)physsz / PAGE_SIZE;
  184 
  185         vm_ksubmap_init(&kmi);
  186 
  187         bufinit();
  188         vm_pager_bufferinit();
  189 
  190         EVENTHANDLER_REGISTER(shutdown_final, sparc64_shutdown_final, NULL,
  191             SHUTDOWN_PRI_LAST);
  192 
  193         printf("avail memory = %lu (%lu MB)\n", cnt.v_free_count * PAGE_SIZE,
  194             cnt.v_free_count / ((1024 * 1024) / PAGE_SIZE));
  195 
  196         if (bootverbose)
  197                 printf("machine: %s\n", sparc64_model);
  198 
  199         cpu_identify(rdpr(ver), PCPU_GET(clock), curcpu);
  200 }
  201 
  202 void
  203 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
  204 {
  205         struct intr_request *ir;
  206         int i;
  207 
  208         pcpu->pc_irtail = &pcpu->pc_irhead;
  209         for (i = 0; i < IR_FREE; i++) {
  210                 ir = &pcpu->pc_irpool[i];
  211                 ir->ir_next = pcpu->pc_irfree;
  212                 pcpu->pc_irfree = ir;
  213         }
  214 }
  215 
  216 void
  217 spinlock_enter(void)
  218 {
  219         struct thread *td;
  220         register_t pil;
  221 
  222         td = curthread;
  223         if (td->td_md.md_spinlock_count == 0) {
  224                 pil = rdpr(pil);
  225                 wrpr(pil, 0, PIL_TICK);
  226                 td->td_md.md_saved_pil = pil;
  227         }
  228         td->td_md.md_spinlock_count++;
  229         critical_enter();
  230 }
  231 
  232 void
  233 spinlock_exit(void)
  234 {
  235         struct thread *td;
  236 
  237         td = curthread;
  238         critical_exit();
  239         td->td_md.md_spinlock_count--;
  240         if (td->td_md.md_spinlock_count == 0)
  241                 wrpr(pil, td->td_md.md_saved_pil, 0);
  242 }
  243 
  244 static phandle_t
  245 find_bsp(phandle_t node, uint32_t bspid, u_int cpu_impl)
  246 {
  247         char type[sizeof("cpu")];
  248         phandle_t child;
  249         uint32_t cpuid;
  250 
  251         for (; node != 0; node = OF_peer(node)) {
  252                 child = OF_child(node);
  253                 if (child > 0) {
  254                         child = find_bsp(child, bspid, cpu_impl);
  255                         if (child > 0)
  256                                 return (child);
  257                 } else {
  258                         if (OF_getprop(node, "device_type", type,
  259                             sizeof(type)) <= 0)
  260                                 continue;
  261                         if (strcmp(type, "cpu") != 0)
  262                                 continue;
  263                         if (OF_getprop(node, cpu_cpuid_prop(cpu_impl), &cpuid,
  264                             sizeof(cpuid)) <= 0)
  265                                 continue;
  266                         if (cpuid == bspid)
  267                                 return (node);
  268                 }
  269         }
  270         return (0);
  271 }
  272 
  273 const char *
  274 cpu_cpuid_prop(u_int cpu_impl)
  275 {
  276 
  277         switch (cpu_impl) {
  278         case CPU_IMPL_SPARC64:
  279         case CPU_IMPL_SPARC64V:
  280         case CPU_IMPL_ULTRASPARCI:
  281         case CPU_IMPL_ULTRASPARCII:
  282         case CPU_IMPL_ULTRASPARCIIi:
  283         case CPU_IMPL_ULTRASPARCIIe:
  284                 return ("upa-portid");
  285         case CPU_IMPL_ULTRASPARCIII:
  286         case CPU_IMPL_ULTRASPARCIIIp:
  287         case CPU_IMPL_ULTRASPARCIIIi:
  288         case CPU_IMPL_ULTRASPARCIIIip:
  289                 return ("portid");
  290         case CPU_IMPL_ULTRASPARCIV:
  291         case CPU_IMPL_ULTRASPARCIVp:
  292                 return ("cpuid");
  293         default:
  294                 return ("");
  295         }
  296 }
  297 
  298 uint32_t
  299 cpu_get_mid(u_int cpu_impl)
  300 {
  301 
  302         switch (cpu_impl) {
  303         case CPU_IMPL_SPARC64:
  304         case CPU_IMPL_SPARC64V:
  305         case CPU_IMPL_ULTRASPARCI:
  306         case CPU_IMPL_ULTRASPARCII:
  307         case CPU_IMPL_ULTRASPARCIIi:
  308         case CPU_IMPL_ULTRASPARCIIe:
  309                 return (UPA_CR_GET_MID(ldxa(0, ASI_UPA_CONFIG_REG)));
  310         case CPU_IMPL_ULTRASPARCIII:
  311         case CPU_IMPL_ULTRASPARCIIIp:
  312                 return (FIREPLANE_CR_GET_AID(ldxa(AA_FIREPLANE_CONFIG,
  313                     ASI_FIREPLANE_CONFIG_REG)));
  314         case CPU_IMPL_ULTRASPARCIIIi:
  315         case CPU_IMPL_ULTRASPARCIIIip:
  316                 return (JBUS_CR_GET_JID(ldxa(0, ASI_JBUS_CONFIG_REG)));
  317         case CPU_IMPL_ULTRASPARCIV:
  318         case CPU_IMPL_ULTRASPARCIVp:
  319                 return (INTR_ID_GET_ID(ldxa(AA_INTR_ID, ASI_INTR_ID)));
  320         default:
  321                 return (0);
  322         }
  323 }
  324 
  325 void
  326 sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3, ofw_vec_t *vec)
  327 {
  328         char *env;
  329         struct pcpu *pc;
  330         vm_offset_t end;
  331         vm_offset_t va;
  332         caddr_t kmdp;
  333         phandle_t root;
  334         u_int cpu_impl;
  335 
  336         end = 0;
  337         kmdp = NULL;
  338 
  339         /*
  340          * Find out what kind of CPU we have first, for anything that changes
  341          * behaviour.
  342          */
  343         cpu_impl = VER_IMPL(rdpr(ver));
  344 
  345         /*
  346          * Do CPU-specific initialization.
  347          */
  348         if (cpu_impl == CPU_IMPL_SPARC64V ||
  349             cpu_impl >= CPU_IMPL_ULTRASPARCIII)
  350                 cheetah_init(cpu_impl);
  351 
  352         /*
  353          * Clear (S)TICK timer (including NPT).
  354          */
  355         tick_clear(cpu_impl);
  356 
  357         /*
  358          * UltraSparc II[e,i] based systems come up with the tick interrupt
  359          * enabled and a handler that resets the tick counter, causing DELAY()
  360          * to not work properly when used early in boot.
  361          * UltraSPARC III based systems come up with the system tick interrupt
  362          * enabled, causing an interrupt storm on startup since they are not
  363          * handled.
  364          */
  365         tick_stop(cpu_impl);
  366 
  367         /*
  368          * Set up Open Firmware entry points.
  369          */
  370         ofw_tba = rdpr(tba);
  371         ofw_vec = (u_long)vec;
  372 
  373         /*
  374          * Parse metadata if present and fetch parameters.  Must be before the
  375          * console is inited so cninit gets the right value of boothowto.
  376          */
  377         if (mdp != NULL) {
  378                 preload_metadata = mdp;
  379                 kmdp = preload_search_by_type("elf kernel");
  380                 if (kmdp != NULL) {
  381                         boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
  382                         kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
  383                         end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
  384                         kernel_tlb_slots = MD_FETCH(kmdp, MODINFOMD_DTLB_SLOTS,
  385                             int);
  386                         kernel_tlbs = (void *)preload_search_info(kmdp,
  387                             MODINFO_METADATA | MODINFOMD_DTLB);
  388                 }
  389         }
  390 
  391         init_param1();
  392 
  393         /*
  394          * Initialize Open Firmware (needed for console).
  395          */
  396         OF_install(OFW_STD_DIRECT, 0);
  397         OF_init(ofw_entry);
  398 
  399         /*
  400          * Prime our per-CPU data page for use.  Note, we are using it for
  401          * our stack, so don't pass the real size (PAGE_SIZE) to pcpu_init
  402          * or it'll zero it out from under us.
  403          */
  404         pc = (struct pcpu *)(pcpu0 + (PCPU_PAGES * PAGE_SIZE)) - 1;
  405         pcpu_init(pc, 0, sizeof(struct pcpu));
  406         pc->pc_addr = (vm_offset_t)pcpu0;
  407         pc->pc_impl = cpu_impl;
  408         pc->pc_mid = cpu_get_mid(cpu_impl);
  409         pc->pc_tlb_ctx = TLB_CTX_USER_MIN;
  410         pc->pc_tlb_ctx_min = TLB_CTX_USER_MIN;
  411         pc->pc_tlb_ctx_max = TLB_CTX_USER_MAX;
  412 
  413         /*
  414          * Determine the OFW node and frequency of the BSP (and ensure the
  415          * BSP is in the device tree in the first place).
  416          */
  417         root = OF_peer(0);
  418         pc->pc_node = find_bsp(root, pc->pc_mid, cpu_impl);
  419         if (pc->pc_node == 0)
  420                 OF_exit();
  421         if (OF_getprop(pc->pc_node, "clock-frequency", &pc->pc_clock,
  422             sizeof(pc->pc_clock)) <= 0)
  423                 OF_exit();
  424 
  425         /*
  426          * Provide a DELAY() that works before PCPU_REG is set.  We can't
  427          * set PCPU_REG without also taking over the trap table or the
  428          * firmware will overwrite it.  Unfortunately, it's way to early
  429          * to also take over the trap table at this point.
  430          */
  431         clock_boot = pc->pc_clock;
  432         delay_func = delay_boot;
  433 
  434         /*
  435          * Initialize the console before printing anything.
  436          * NB: the low-level console drivers require a working DELAY() at
  437          * this point.
  438          */
  439         cninit();
  440 
  441         /*
  442          * Panic if there is no metadata.  Most likely the kernel was booted
  443          * directly, instead of through loader(8).
  444          */
  445         if (mdp == NULL || kmdp == NULL || end == 0 ||
  446             kernel_tlb_slots == 0 || kernel_tlbs == NULL) {
  447                 printf("sparc64_init: missing loader metadata.\n"
  448                     "This probably means you are not using loader(8).\n");
  449                 panic("sparc64_init");
  450         }
  451 
  452         /*
  453          * Work around the broken loader behavior of not demapping no
  454          * longer used kernel TLB slots when unloading the kernel or
  455          * modules.
  456          */
  457         for (va = KERNBASE + (kernel_tlb_slots - 1) * PAGE_SIZE_4M;
  458             va >= roundup2(end, PAGE_SIZE_4M); va -= PAGE_SIZE_4M) {
  459                 if (bootverbose)
  460                         printf("demapping unused kernel TLB slot "
  461                             "(va %#lx - %#lx)\n", va, va + PAGE_SIZE_4M - 1);
  462                 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE,
  463                     ASI_DMMU_DEMAP, 0);
  464                 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE,
  465                     ASI_IMMU_DEMAP, 0);
  466                 flush(KERNBASE);
  467                 kernel_tlb_slots--;
  468         }
  469 
  470         /*
  471          * Determine the TLB slot maxima, which are expected to be
  472          * equal across all CPUs.
  473          * NB: for cheetah-class CPUs, these properties only refer
  474          * to the t16s.
  475          */
  476         if (OF_getprop(pc->pc_node, "#dtlb-entries", &dtlb_slots,
  477             sizeof(dtlb_slots)) == -1)
  478                 panic("sparc64_init: cannot determine number of dTLB slots");
  479         if (OF_getprop(pc->pc_node, "#itlb-entries", &itlb_slots,
  480             sizeof(itlb_slots)) == -1)
  481                 panic("sparc64_init: cannot determine number of iTLB slots");
  482 
  483         /*
  484          * Initialize and enable the caches.  Note that his may include
  485          * applying workarounds.
  486          */
  487         cache_init(pc);
  488         cache_enable(cpu_impl);
  489         uma_set_align(pc->pc_cache.dc_linesize - 1);
  490 
  491         cpu_block_copy = bcopy;
  492         cpu_block_zero = bzero;
  493         getenv_int("machdep.use_vis", &cpu_use_vis);
  494         if (cpu_use_vis) {
  495                 switch (cpu_impl) {
  496                 case CPU_IMPL_SPARC64:
  497                 case CPU_IMPL_SPARC64V:
  498                 case CPU_IMPL_ULTRASPARCI:
  499                 case CPU_IMPL_ULTRASPARCII:
  500                 case CPU_IMPL_ULTRASPARCIIi:
  501                 case CPU_IMPL_ULTRASPARCIIe:
  502                 case CPU_IMPL_ULTRASPARCIII:    /* NB: we've disabled P$. */
  503                 case CPU_IMPL_ULTRASPARCIIIp:
  504                 case CPU_IMPL_ULTRASPARCIIIi:
  505                 case CPU_IMPL_ULTRASPARCIV:
  506                 case CPU_IMPL_ULTRASPARCIVp:
  507                 case CPU_IMPL_ULTRASPARCIIIip:
  508                         cpu_block_copy = spitfire_block_copy;
  509                         cpu_block_zero = spitfire_block_zero;
  510                         break;
  511                 }
  512         }
  513 
  514 #ifdef SMP
  515         mp_init(cpu_impl);
  516 #endif
  517 
  518         /*
  519          * Initialize virtual memory and calculate physmem.
  520          */
  521         pmap_bootstrap(cpu_impl);
  522 
  523         /*
  524          * Initialize tunables.
  525          */
  526         init_param2(physmem);
  527         env = getenv("kernelname");
  528         if (env != NULL) {
  529                 strlcpy(kernelname, env, sizeof(kernelname));
  530                 freeenv(env);
  531         }
  532 
  533         /*
  534          * Initialize the interrupt tables.
  535          */
  536         intr_init1();
  537 
  538         /*
  539          * Initialize proc0, set kstack0, frame0, curthread and curpcb.
  540          */
  541         proc_linkup0(&proc0, &thread0);
  542         proc0.p_md.md_sigtramp = NULL;
  543         proc0.p_md.md_utrap = NULL;
  544         thread0.td_kstack = kstack0;
  545         thread0.td_pcb = (struct pcb *)
  546             (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
  547         frame0.tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_PRIV;
  548         thread0.td_frame = &frame0;
  549         pc->pc_curthread = &thread0;
  550         pc->pc_curpcb = thread0.td_pcb;
  551 
  552         /*
  553          * Initialize global registers.
  554          */
  555         cpu_setregs(pc);
  556 
  557         /*
  558          * Take over the trap table via the PROM.  Using the PROM for this
  559          * is necessary in order to set obp-control-relinquished to true
  560          * within the PROM so obtaining /virtual-memory/translations doesn't
  561          * trigger a fatal reset error or worse things further down the road.
  562          * XXX it should be possible to use this soley instead of writing
  563          * %tba in cpu_setregs().  Doing so causes a hang however.
  564          */
  565         sun4u_set_traptable(tl0_base);
  566 
  567         /*
  568          * It's now safe to use the real DELAY().
  569          */
  570         delay_func = delay_tick;
  571 
  572         /*
  573          * Initialize the dynamic per-CPU area for the BSP and the message
  574          * buffer (after setting the trap table).
  575          */
  576         dpcpu_init(dpcpu0, 0);
  577         msgbufinit(msgbufp, MSGBUF_SIZE);
  578 
  579         /*
  580          * Initialize mutexes.
  581          */
  582         mutex_init();
  583 
  584         /*
  585          * Finish the interrupt initialization now that mutexes work and
  586          * enable them.
  587          */
  588         intr_init2();
  589         wrpr(pil, 0, PIL_TICK);
  590         wrpr(pstate, 0, PSTATE_KERNEL);
  591 
  592         /*
  593          * Finish pmap initialization now that we're ready for mutexes.
  594          */
  595         PMAP_LOCK_INIT(kernel_pmap);
  596 
  597         OF_getprop(root, "name", sparc64_model, sizeof(sparc64_model) - 1);
  598 
  599         kdb_init();
  600 
  601 #ifdef KDB
  602         if (boothowto & RB_KDB)
  603                 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
  604 #endif
  605 }
  606 
  607 void
  608 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
  609 {
  610         struct trapframe *tf;
  611         struct sigframe *sfp;
  612         struct sigacts *psp;
  613         struct sigframe sf;
  614         struct thread *td;
  615         struct frame *fp;
  616         struct proc *p;
  617         u_long sp;
  618         int oonstack;
  619         int sig;
  620 
  621         oonstack = 0;
  622         td = curthread;
  623         p = td->td_proc;
  624         PROC_LOCK_ASSERT(p, MA_OWNED);
  625         sig = ksi->ksi_signo;
  626         psp = p->p_sigacts;
  627         mtx_assert(&psp->ps_mtx, MA_OWNED);
  628         tf = td->td_frame;
  629         sp = tf->tf_sp + SPOFF;
  630         oonstack = sigonstack(sp);
  631 
  632         CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
  633             catcher, sig);
  634 
  635         /* Make sure we have a signal trampoline to return to. */
  636         if (p->p_md.md_sigtramp == NULL) {
  637                 /*
  638                  * No signal trampoline... kill the process.
  639                  */
  640                 CTR0(KTR_SIG, "sendsig: no sigtramp");
  641                 printf("sendsig: %s is too old, rebuild it\n", p->p_comm);
  642                 sigexit(td, sig);
  643                 /* NOTREACHED */
  644         }
  645 
  646         /* Save user context. */
  647         bzero(&sf, sizeof(sf));
  648         get_mcontext(td, &sf.sf_uc.uc_mcontext, 0);
  649         sf.sf_uc.uc_sigmask = *mask;
  650         sf.sf_uc.uc_stack = td->td_sigstk;
  651         sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ?
  652             ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
  653 
  654         /* Allocate and validate space for the signal handler context. */
  655         if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
  656             SIGISMEMBER(psp->ps_sigonstack, sig)) {
  657                 sfp = (struct sigframe *)(td->td_sigstk.ss_sp +
  658                     td->td_sigstk.ss_size - sizeof(struct sigframe));
  659         } else
  660                 sfp = (struct sigframe *)sp - 1;
  661         mtx_unlock(&psp->ps_mtx);
  662         PROC_UNLOCK(p);
  663 
  664         fp = (struct frame *)sfp - 1;
  665 
  666         /* Translate the signal if appropriate. */
  667         if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize)
  668                 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)];
  669 
  670         /* Build the argument list for the signal handler. */
  671         tf->tf_out[0] = sig;
  672         tf->tf_out[2] = (register_t)&sfp->sf_uc;
  673         tf->tf_out[4] = (register_t)catcher;
  674         if (SIGISMEMBER(psp->ps_siginfo, sig)) {
  675                 /* Signal handler installed with SA_SIGINFO. */
  676                 tf->tf_out[1] = (register_t)&sfp->sf_si;
  677 
  678                 /* Fill in POSIX parts. */
  679                 sf.sf_si = ksi->ksi_info;
  680                 sf.sf_si.si_signo = sig; /* maybe a translated signal */
  681         } else {
  682                 /* Old FreeBSD-style arguments. */
  683                 tf->tf_out[1] = ksi->ksi_code;
  684                 tf->tf_out[3] = (register_t)ksi->ksi_addr;
  685         }
  686 
  687         /* Copy the sigframe out to the user's stack. */
  688         if (rwindow_save(td) != 0 || copyout(&sf, sfp, sizeof(*sfp)) != 0 ||
  689             suword(&fp->fr_in[6], tf->tf_out[6]) != 0) {
  690                 /*
  691                  * Something is wrong with the stack pointer.
  692                  * ...Kill the process.
  693                  */
  694                 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp);
  695                 PROC_LOCK(p);
  696                 sigexit(td, SIGILL);
  697                 /* NOTREACHED */
  698         }
  699 
  700         tf->tf_tpc = (u_long)p->p_md.md_sigtramp;
  701         tf->tf_tnpc = tf->tf_tpc + 4;
  702         tf->tf_sp = (u_long)fp - SPOFF;
  703 
  704         CTR3(KTR_SIG, "sendsig: return td=%p pc=%#lx sp=%#lx", td, tf->tf_tpc,
  705             tf->tf_sp);
  706 
  707         PROC_LOCK(p);
  708         mtx_lock(&psp->ps_mtx);
  709 }
  710 
  711 #ifndef _SYS_SYSPROTO_H_
  712 struct sigreturn_args {
  713         ucontext_t *ucp;
  714 };
  715 #endif
  716 
  717 /*
  718  * MPSAFE
  719  */
  720 int
  721 sigreturn(struct thread *td, struct sigreturn_args *uap)
  722 {
  723         struct proc *p;
  724         mcontext_t *mc;
  725         ucontext_t uc;
  726         int error;
  727 
  728         p = td->td_proc;
  729         if (rwindow_save(td)) {
  730                 PROC_LOCK(p);
  731                 sigexit(td, SIGILL);
  732         }
  733 
  734         CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
  735         if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
  736                 CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
  737                 return (EFAULT);
  738         }
  739 
  740         mc = &uc.uc_mcontext;
  741         error = set_mcontext(td, mc);
  742         if (error != 0)
  743                 return (error);
  744 
  745         kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
  746 
  747         CTR4(KTR_SIG, "sigreturn: return td=%p pc=%#lx sp=%#lx tstate=%#lx",
  748             td, mc->mc_tpc, mc->mc_sp, mc->mc_tstate);
  749         return (EJUSTRETURN);
  750 }
  751 
  752 /*
  753  * Construct a PCB from a trapframe. This is called from kdb_trap() where
  754  * we want to start a backtrace from the function that caused us to enter
  755  * the debugger. We have the context in the trapframe, but base the trace
  756  * on the PCB. The PCB doesn't have to be perfect, as long as it contains
  757  * enough for a backtrace.
  758  */
  759 void
  760 makectx(struct trapframe *tf, struct pcb *pcb)
  761 {
  762 
  763         pcb->pcb_pc = tf->tf_tpc;
  764         pcb->pcb_sp = tf->tf_sp;
  765 }
  766 
  767 int
  768 get_mcontext(struct thread *td, mcontext_t *mc, int flags)
  769 {
  770         struct trapframe *tf;
  771         struct pcb *pcb;
  772 
  773         tf = td->td_frame;
  774         pcb = td->td_pcb;
  775         /*
  776          * Copy the registers which will be restored by tl0_ret() from the
  777          * trapframe.
  778          * Note that we skip %g7 which is used as the userland TLS register
  779          * and %wstate.
  780          */
  781         mc->mc_flags = _MC_VERSION;
  782         mc->mc_global[1] = tf->tf_global[1];
  783         mc->mc_global[2] = tf->tf_global[2];
  784         mc->mc_global[3] = tf->tf_global[3];
  785         mc->mc_global[4] = tf->tf_global[4];
  786         mc->mc_global[5] = tf->tf_global[5];
  787         mc->mc_global[6] = tf->tf_global[6];
  788         if (flags & GET_MC_CLEAR_RET) {
  789                 mc->mc_out[0] = 0;
  790                 mc->mc_out[1] = 0;
  791         } else {
  792                 mc->mc_out[0] = tf->tf_out[0];
  793                 mc->mc_out[1] = tf->tf_out[1];
  794         }
  795         mc->mc_out[2] = tf->tf_out[2];
  796         mc->mc_out[3] = tf->tf_out[3];
  797         mc->mc_out[4] = tf->tf_out[4];
  798         mc->mc_out[5] = tf->tf_out[5];
  799         mc->mc_out[6] = tf->tf_out[6];
  800         mc->mc_out[7] = tf->tf_out[7];
  801         mc->mc_fprs = tf->tf_fprs;
  802         mc->mc_fsr = tf->tf_fsr;
  803         mc->mc_gsr = tf->tf_gsr;
  804         mc->mc_tnpc = tf->tf_tnpc;
  805         mc->mc_tpc = tf->tf_tpc;
  806         mc->mc_tstate = tf->tf_tstate;
  807         mc->mc_y = tf->tf_y;
  808         critical_enter();
  809         if ((tf->tf_fprs & FPRS_FEF) != 0) {
  810                 savefpctx(pcb->pcb_ufp);
  811                 tf->tf_fprs &= ~FPRS_FEF;
  812                 pcb->pcb_flags |= PCB_FEF;
  813         }
  814         if ((pcb->pcb_flags & PCB_FEF) != 0) {
  815                 bcopy(pcb->pcb_ufp, mc->mc_fp, sizeof(mc->mc_fp));
  816                 mc->mc_fprs |= FPRS_FEF;
  817         }
  818         critical_exit();
  819         return (0);
  820 }
  821 
  822 int
  823 set_mcontext(struct thread *td, const mcontext_t *mc)
  824 {
  825         struct trapframe *tf;
  826         struct pcb *pcb;
  827 
  828         if (!TSTATE_SECURE(mc->mc_tstate) ||
  829             (mc->mc_flags & ((1L << _MC_VERSION_BITS) - 1)) != _MC_VERSION)
  830                 return (EINVAL);
  831         tf = td->td_frame;
  832         pcb = td->td_pcb;
  833         /* Make sure the windows are spilled first. */
  834         flushw();
  835         /*
  836          * Copy the registers which will be restored by tl0_ret() to the
  837          * trapframe.
  838          * Note that we skip %g7 which is used as the userland TLS register
  839          * and %wstate.
  840          */
  841         tf->tf_global[1] = mc->mc_global[1];
  842         tf->tf_global[2] = mc->mc_global[2];
  843         tf->tf_global[3] = mc->mc_global[3];
  844         tf->tf_global[4] = mc->mc_global[4];
  845         tf->tf_global[5] = mc->mc_global[5];
  846         tf->tf_global[6] = mc->mc_global[6];
  847         tf->tf_out[0] = mc->mc_out[0];
  848         tf->tf_out[1] = mc->mc_out[1];
  849         tf->tf_out[2] = mc->mc_out[2];
  850         tf->tf_out[3] = mc->mc_out[3];
  851         tf->tf_out[4] = mc->mc_out[4];
  852         tf->tf_out[5] = mc->mc_out[5];
  853         tf->tf_out[6] = mc->mc_out[6];
  854         tf->tf_out[7] = mc->mc_out[7];
  855         tf->tf_fprs = mc->mc_fprs;
  856         tf->tf_fsr = mc->mc_fsr;
  857         tf->tf_gsr = mc->mc_gsr;
  858         tf->tf_tnpc = mc->mc_tnpc;
  859         tf->tf_tpc = mc->mc_tpc;
  860         tf->tf_tstate = mc->mc_tstate;
  861         tf->tf_y = mc->mc_y;
  862         if ((mc->mc_fprs & FPRS_FEF) != 0) {
  863                 tf->tf_fprs = 0;
  864                 bcopy(mc->mc_fp, pcb->pcb_ufp, sizeof(pcb->pcb_ufp));
  865                 pcb->pcb_flags |= PCB_FEF;
  866         }
  867         return (0);
  868 }
  869 
  870 /*
  871  * Exit the kernel and execute a firmware call that will not return, as
  872  * specified by the arguments.
  873  */
  874 void
  875 cpu_shutdown(void *args)
  876 {
  877 
  878 #ifdef SMP
  879         cpu_mp_shutdown();
  880 #endif
  881         ofw_exit(args);
  882 }
  883 
  884 /*
  885  * Flush the D-cache for non-DMA I/O so that the I-cache can
  886  * be made coherent later.
  887  */
  888 void
  889 cpu_flush_dcache(void *ptr, size_t len)
  890 {
  891 
  892         /* TBD */
  893 }
  894 
  895 /* Get current clock frequency for the given CPU ID. */
  896 int
  897 cpu_est_clockrate(int cpu_id, uint64_t *rate)
  898 {
  899         struct pcpu *pc;
  900 
  901         pc = pcpu_find(cpu_id);
  902         if (pc == NULL || rate == NULL)
  903                 return (EINVAL);
  904         *rate = pc->pc_clock;
  905         return (0);
  906 }
  907 
  908 /*
  909  * Duplicate OF_exit() with a different firmware call function that restores
  910  * the trap table, otherwise a RED state exception is triggered in at least
  911  * some firmware versions.
  912  */
  913 void
  914 cpu_halt(void)
  915 {
  916         static struct {
  917                 cell_t name;
  918                 cell_t nargs;
  919                 cell_t nreturns;
  920         } args = {
  921                 (cell_t)"exit",
  922                 0,
  923                 0
  924         };
  925 
  926         cpu_shutdown(&args);
  927 }
  928 
  929 static void
  930 sparc64_shutdown_final(void *dummy, int howto)
  931 {
  932         static struct {
  933                 cell_t name;
  934                 cell_t nargs;
  935                 cell_t nreturns;
  936         } args = {
  937                 (cell_t)"SUNW,power-off",
  938                 0,
  939                 0
  940         };
  941 
  942         /* Turn the power off? */
  943         if ((howto & RB_POWEROFF) != 0)
  944                 cpu_shutdown(&args);
  945         /* In case of halt, return to the firmware. */
  946         if ((howto & RB_HALT) != 0)
  947                 cpu_halt();
  948 }
  949 
  950 void
  951 cpu_idle(int busy)
  952 {
  953 
  954         /* Insert code to halt (until next interrupt) for the idle loop. */
  955 }
  956 
  957 int
  958 cpu_idle_wakeup(int cpu)
  959 {
  960 
  961         return (0);
  962 }
  963 
  964 int
  965 ptrace_set_pc(struct thread *td, u_long addr)
  966 {
  967 
  968         td->td_frame->tf_tpc = addr;
  969         td->td_frame->tf_tnpc = addr + 4;
  970         return (0);
  971 }
  972 
  973 int
  974 ptrace_single_step(struct thread *td)
  975 {
  976 
  977         /* TODO; */
  978         return (0);
  979 }
  980 
  981 int
  982 ptrace_clear_single_step(struct thread *td)
  983 {
  984 
  985         /* TODO; */
  986         return (0);
  987 }
  988 
  989 void
  990 exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings)
  991 {
  992         struct trapframe *tf;
  993         struct pcb *pcb;
  994         struct proc *p;
  995         u_long sp;
  996 
  997         /* XXX no cpu_exec */
  998         p = td->td_proc;
  999         p->p_md.md_sigtramp = NULL;
 1000         if (p->p_md.md_utrap != NULL) {
 1001                 utrap_free(p->p_md.md_utrap);
 1002                 p->p_md.md_utrap = NULL;
 1003         }
 1004 
 1005         pcb = td->td_pcb;
 1006         tf = td->td_frame;
 1007         sp = rounddown(stack, 16);
 1008         bzero(pcb, sizeof(*pcb));
 1009         bzero(tf, sizeof(*tf));
 1010         tf->tf_out[0] = stack;
 1011         tf->tf_out[3] = p->p_sysent->sv_psstrings;
 1012         tf->tf_out[6] = sp - SPOFF - sizeof(struct frame);
 1013         tf->tf_tnpc = entry + 4;
 1014         tf->tf_tpc = entry;
 1015         tf->tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_MM_TSO;
 1016 
 1017         td->td_retval[0] = tf->tf_out[0];
 1018         td->td_retval[1] = tf->tf_out[1];
 1019 }
 1020 
 1021 int
 1022 fill_regs(struct thread *td, struct reg *regs)
 1023 {
 1024 
 1025         bcopy(td->td_frame, regs, sizeof(*regs));
 1026         return (0);
 1027 }
 1028 
 1029 int
 1030 set_regs(struct thread *td, struct reg *regs)
 1031 {
 1032         struct trapframe *tf;
 1033 
 1034         if (!TSTATE_SECURE(regs->r_tstate))
 1035                 return (EINVAL);
 1036         tf = td->td_frame;
 1037         regs->r_wstate = tf->tf_wstate;
 1038         bcopy(regs, tf, sizeof(*regs));
 1039         return (0);
 1040 }
 1041 
 1042 int
 1043 fill_dbregs(struct thread *td, struct dbreg *dbregs)
 1044 {
 1045 
 1046         return (ENOSYS);
 1047 }
 1048 
 1049 int
 1050 set_dbregs(struct thread *td, struct dbreg *dbregs)
 1051 {
 1052 
 1053         return (ENOSYS);
 1054 }
 1055 
 1056 int
 1057 fill_fpregs(struct thread *td, struct fpreg *fpregs)
 1058 {
 1059         struct trapframe *tf;
 1060         struct pcb *pcb;
 1061 
 1062         pcb = td->td_pcb;
 1063         tf = td->td_frame;
 1064         bcopy(pcb->pcb_ufp, fpregs->fr_regs, sizeof(fpregs->fr_regs));
 1065         fpregs->fr_fsr = tf->tf_fsr;
 1066         fpregs->fr_gsr = tf->tf_gsr;
 1067         return (0);
 1068 }
 1069 
 1070 int
 1071 set_fpregs(struct thread *td, struct fpreg *fpregs)
 1072 {
 1073         struct trapframe *tf;
 1074         struct pcb *pcb;
 1075 
 1076         pcb = td->td_pcb;
 1077         tf = td->td_frame;
 1078         tf->tf_fprs &= ~FPRS_FEF;
 1079         bcopy(fpregs->fr_regs, pcb->pcb_ufp, sizeof(pcb->pcb_ufp));
 1080         tf->tf_fsr = fpregs->fr_fsr;
 1081         tf->tf_gsr = fpregs->fr_gsr;
 1082         return (0);
 1083 }
 1084 
 1085 struct md_utrap *
 1086 utrap_alloc(void)
 1087 {
 1088         struct md_utrap *ut;
 1089 
 1090         ut = malloc(sizeof(struct md_utrap), M_SUBPROC, M_WAITOK | M_ZERO);
 1091         ut->ut_refcnt = 1;
 1092         return (ut);
 1093 }
 1094 
 1095 void
 1096 utrap_free(struct md_utrap *ut)
 1097 {
 1098         int refcnt;
 1099 
 1100         if (ut == NULL)
 1101                 return;
 1102         mtx_pool_lock(mtxpool_sleep, ut);
 1103         ut->ut_refcnt--;
 1104         refcnt = ut->ut_refcnt;
 1105         mtx_pool_unlock(mtxpool_sleep, ut);
 1106         if (refcnt == 0)
 1107                 free(ut, M_SUBPROC);
 1108 }
 1109 
 1110 struct md_utrap *
 1111 utrap_hold(struct md_utrap *ut)
 1112 {
 1113 
 1114         if (ut == NULL)
 1115                 return (NULL);
 1116         mtx_pool_lock(mtxpool_sleep, ut);
 1117         ut->ut_refcnt++;
 1118         mtx_pool_unlock(mtxpool_sleep, ut);
 1119         return (ut);
 1120 }
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FreeBSD/Linux Kernel Cross Reference sys/sparc64/sparc64/machdep.c

FreeBSD/Linux Kernel Cross Reference
sys/sparc64/sparc64/machdep.c
