machdep.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
    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("$FreeBSD$");
   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/cpu.h>
   93 #include <machine/fp.h>
   94 #include <machine/fsr.h>
   95 #include <machine/intr_machdep.h>
   96 #include <machine/md_var.h>
   97 #include <machine/metadata.h>
   98 #include <machine/ofw_machdep.h>
   99 #include <machine/ofw_mem.h>
  100 #include <machine/pcb.h>
  101 #include <machine/pmap.h>
  102 #include <machine/pstate.h>
  103 #include <machine/reg.h>
  104 #include <machine/sigframe.h>
  105 #include <machine/smp.h>
  106 #include <machine/tick.h>
  107 #include <machine/tlb.h>
  108 #include <machine/tstate.h>
  109 #include <machine/upa.h>
  110 #include <machine/ver.h>
  111 
  112 typedef int ofw_vec_t(void *);
  113 
  114 #ifdef DDB
  115 extern vm_offset_t ksym_start, ksym_end;
  116 #endif
  117 
  118 struct tlb_entry *kernel_tlbs;
  119 int kernel_tlb_slots;
  120 
  121 int cold = 1;
  122 long Maxmem;
  123 long realmem;
  124 
  125 char pcpu0[PCPU_PAGES * PAGE_SIZE];
  126 struct trapframe frame0;
  127 
  128 vm_offset_t kstack0;
  129 vm_paddr_t kstack0_phys;
  130 
  131 struct kva_md_info kmi;
  132 
  133 u_long ofw_vec;
  134 u_long ofw_tba;
  135 
  136 /*
  137  * Note: timer quality for CPU's is set low to try and prevent them from
  138  * being chosen as the primary timecounter.  The CPU counters are not
  139  * synchronized among the CPU's so in MP machines this causes problems
  140  * when calculating the time.  With this value the CPU's should only be
  141  * chosen as the primary timecounter as a last resort.
  142  */
  143 
  144 #define UP_TICK_QUALITY 1000
  145 #define MP_TICK_QUALITY -100
  146 static struct timecounter tick_tc;
  147 
  148 char sparc64_model[32];
  149 
  150 static int cpu_use_vis = 1;
  151 
  152 cpu_block_copy_t *cpu_block_copy;
  153 cpu_block_zero_t *cpu_block_zero;
  154 
  155 static timecounter_get_t tick_get_timecount;
  156 void sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3,
  157     ofw_vec_t *vec);
  158 void sparc64_shutdown_final(void *dummy, int howto);
  159 
  160 static void cpu_startup(void *);
  161 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
  162 
  163 CTASSERT((1 << INT_SHIFT) == sizeof(int));
  164 CTASSERT((1 << PTR_SHIFT) == sizeof(char *));
  165 
  166 CTASSERT(sizeof(struct reg) == 256);
  167 CTASSERT(sizeof(struct fpreg) == 272);
  168 CTASSERT(sizeof(struct __mcontext) == 512);
  169 
  170 CTASSERT((sizeof(struct pcb) & (64 - 1)) == 0);
  171 CTASSERT((offsetof(struct pcb, pcb_kfp) & (64 - 1)) == 0);
  172 CTASSERT((offsetof(struct pcb, pcb_ufp) & (64 - 1)) == 0);
  173 CTASSERT(sizeof(struct pcb) <= ((KSTACK_PAGES * PAGE_SIZE) / 8));
  174 
  175 CTASSERT(sizeof(struct pcpu) <= ((PCPU_PAGES * PAGE_SIZE) / 2));
  176 
  177 static void
  178 cpu_startup(void *arg)
  179 {
  180         vm_paddr_t physsz;
  181         int i;
  182 
  183         tick_tc.tc_get_timecount = tick_get_timecount;
  184         tick_tc.tc_poll_pps = NULL;
  185         tick_tc.tc_counter_mask = ~0u;
  186         tick_tc.tc_frequency = tick_freq;
  187         tick_tc.tc_name = "tick";
  188         tick_tc.tc_quality = UP_TICK_QUALITY;
  189 #ifdef SMP
  190         /*
  191          * We do not know if each CPU's tick counter is synchronized.
  192          */
  193         if (cpu_mp_probe())
  194                 tick_tc.tc_quality = MP_TICK_QUALITY;
  195 #endif
  196 
  197         tc_init(&tick_tc);
  198 
  199         physsz = 0;
  200         for (i = 0; i < sparc64_nmemreg; i++)
  201                 physsz += sparc64_memreg[i].mr_size;
  202         printf("real memory  = %lu (%lu MB)\n", physsz,
  203             physsz / (1024 * 1024));
  204         realmem = (long)physsz / PAGE_SIZE;
  205 
  206         vm_ksubmap_init(&kmi);
  207 
  208         bufinit();
  209         vm_pager_bufferinit();
  210 
  211         EVENTHANDLER_REGISTER(shutdown_final, sparc64_shutdown_final, NULL,
  212             SHUTDOWN_PRI_LAST);
  213 
  214         printf("avail memory = %lu (%lu MB)\n", cnt.v_free_count * PAGE_SIZE,
  215             cnt.v_free_count / ((1024 * 1024) / PAGE_SIZE));
  216 
  217         if (bootverbose)
  218                 printf("machine: %s\n", sparc64_model);
  219 
  220         cpu_identify(rdpr(ver), tick_freq, PCPU_GET(cpuid));
  221 }
  222 
  223 void
  224 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
  225 {
  226         struct intr_request *ir;
  227         int i;
  228 
  229         pcpu->pc_irtail = &pcpu->pc_irhead;
  230         for (i = 0; i < IR_FREE; i++) {
  231                 ir = &pcpu->pc_irpool[i];
  232                 ir->ir_next = pcpu->pc_irfree;
  233                 pcpu->pc_irfree = ir;
  234         }
  235 }
  236 
  237 void
  238 spinlock_enter(void)
  239 {
  240         struct thread *td;
  241         register_t pil;
  242 
  243         td = curthread;
  244         if (td->td_md.md_spinlock_count == 0) {
  245                 pil = rdpr(pil);
  246                 wrpr(pil, 0, PIL_TICK);
  247                 td->td_md.md_saved_pil = pil;
  248         }
  249         td->td_md.md_spinlock_count++;
  250         critical_enter();
  251 }
  252 
  253 void
  254 spinlock_exit(void)
  255 {
  256         struct thread *td;
  257 
  258         td = curthread;
  259         critical_exit();
  260         td->td_md.md_spinlock_count--;
  261         if (td->td_md.md_spinlock_count == 0)
  262                 wrpr(pil, td->td_md.md_saved_pil, 0);
  263 }
  264 
  265 unsigned
  266 tick_get_timecount(struct timecounter *tc)
  267 {
  268         return ((unsigned)rd(tick));
  269 }
  270 
  271 void
  272 sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3, ofw_vec_t *vec)
  273 {
  274         char type[8];
  275         char *env;
  276         struct pcpu *pc;
  277         vm_offset_t end;
  278         vm_offset_t va;
  279         caddr_t kmdp;
  280         phandle_t child;
  281         phandle_t root;
  282         u_int clock;
  283 
  284         end = 0;
  285         kmdp = NULL;
  286 
  287         /*
  288          * Find out what kind of CPU we have first, for anything that changes
  289          * behaviour.
  290          */
  291         cpu_impl = VER_IMPL(rdpr(ver));
  292 
  293         /*
  294          * Initialize Open Firmware (needed for console).
  295          */
  296         OF_init(vec);
  297 
  298         /*
  299          * Parse metadata if present and fetch parameters.  Must be before the
  300          * console is inited so cninit gets the right value of boothowto.
  301          */
  302         if (mdp != NULL) {
  303                 preload_metadata = mdp;
  304                 kmdp = preload_search_by_type("elf kernel");
  305                 if (kmdp != NULL) {
  306                         boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
  307                         kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
  308                         end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
  309                         kernel_tlb_slots = MD_FETCH(kmdp, MODINFOMD_DTLB_SLOTS,
  310                             int);
  311                         kernel_tlbs = (void *)preload_search_info(kmdp,
  312                             MODINFO_METADATA | MODINFOMD_DTLB);
  313                 }
  314         }
  315 
  316         init_param1();
  317 
  318         root = OF_peer(0);
  319         for (child = OF_child(root); child != 0; child = OF_peer(child)) {
  320                 OF_getprop(child, "device_type", type, sizeof(type));
  321                 if (strcmp(type, "cpu") == 0)
  322                         break;
  323         }
  324 
  325         /*
  326          * Initialize the tick counter.  Must be before the console is inited
  327          * in order to provide the low-level console drivers with a working
  328          * DELAY().
  329          */
  330         OF_getprop(child, "clock-frequency", &clock, sizeof(clock));
  331         tick_init(clock);
  332 
  333         /*
  334          * Initialize the console before printing anything.
  335          */
  336         cninit();
  337 
  338         /*
  339          * Panic if there is no metadata.  Most likely the kernel was booted
  340          * directly, instead of through loader(8).
  341          */
  342         if (mdp == NULL || kmdp == NULL || end == 0 ||
  343             kernel_tlb_slots == 0 || kernel_tlbs == NULL) {
  344                 printf("sparc64_init: missing loader metadata.\n"
  345                     "This probably means you are not using loader(8).\n");
  346                 panic("sparc64_init");
  347         }
  348 
  349         /*
  350          * Work around the broken loader behavior of not demapping no
  351          * longer used kernel TLB slots when unloading the kernel or
  352          * modules.
  353          */
  354         for (va = KERNBASE + (kernel_tlb_slots - 1) * PAGE_SIZE_4M;
  355             va >= roundup2(end, PAGE_SIZE_4M); va -= PAGE_SIZE_4M) {
  356                 printf("demapping unused kernel TLB slot (va %#lx - %#lx)\n",
  357                     va, va + PAGE_SIZE_4M - 1);
  358                 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE,
  359                     ASI_DMMU_DEMAP, 0);
  360                 stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE,
  361                     ASI_IMMU_DEMAP, 0);
  362                 flush(KERNBASE);
  363                 kernel_tlb_slots--;
  364         }
  365 
  366         cache_init(child);
  367 
  368         getenv_int("machdep.use_vis", &cpu_use_vis);
  369         if (cpu_use_vis) {
  370                 cpu_block_copy = spitfire_block_copy;
  371                 cpu_block_zero = spitfire_block_zero;
  372         } else {
  373                 cpu_block_copy = bcopy;
  374                 cpu_block_zero = bzero;
  375         }
  376 
  377 #ifdef SMP
  378         mp_tramp = mp_tramp_alloc();
  379 #endif
  380 
  381         /*
  382          * Initialize virtual memory and calculate physmem.
  383          */
  384         pmap_bootstrap();
  385 
  386         /*
  387          * Initialize tunables.
  388          */
  389         init_param2(physmem);
  390         env = getenv("kernelname");
  391         if (env != NULL) {
  392                 strlcpy(kernelname, env, sizeof(kernelname));
  393                 freeenv(env);
  394         }
  395 
  396         /*
  397          * Initialize the interrupt tables.
  398          */
  399         intr_init1();
  400 
  401         /*
  402          * Initialize proc0 stuff (p_contested needs to be done early).
  403          */
  404         proc_linkup(&proc0, &ksegrp0, &thread0);
  405         proc0.p_md.md_sigtramp = NULL;
  406         proc0.p_md.md_utrap = NULL;
  407         thread0.td_kstack = kstack0;
  408         thread0.td_pcb = (struct pcb *)
  409             (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
  410         frame0.tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_PRIV;
  411         thread0.td_frame = &frame0;
  412 
  413         /*
  414          * Prime our per-cpu data page for use.  Note, we are using it for our
  415          * stack, so don't pass the real size (PAGE_SIZE) to pcpu_init or
  416          * it'll zero it out from under us.
  417          */
  418         pc = (struct pcpu *)(pcpu0 + (PCPU_PAGES * PAGE_SIZE)) - 1;
  419         pcpu_init(pc, 0, sizeof(struct pcpu));
  420         pc->pc_curthread = &thread0;
  421         pc->pc_curpcb = thread0.td_pcb;
  422         pc->pc_mid = UPA_CR_GET_MID(ldxa(0, ASI_UPA_CONFIG_REG));
  423         pc->pc_addr = (vm_offset_t)pcpu0;
  424         pc->pc_node = child;
  425         pc->pc_tlb_ctx = TLB_CTX_USER_MIN;
  426         pc->pc_tlb_ctx_min = TLB_CTX_USER_MIN;
  427         pc->pc_tlb_ctx_max = TLB_CTX_USER_MAX;
  428 
  429         /*
  430          * Initialize global registers.
  431          */
  432         cpu_setregs(pc);
  433 
  434         /*
  435          * Initialize the message buffer (after setting trap table).
  436          */
  437         msgbufinit(msgbufp, MSGBUF_SIZE);
  438 
  439         mutex_init();
  440         intr_init2();
  441 
  442         /*
  443          * Finish pmap initialization now that we're ready for mutexes.
  444          */
  445         PMAP_LOCK_INIT(kernel_pmap);
  446 
  447         OF_getprop(root, "name", sparc64_model, sizeof(sparc64_model) - 1);
  448 
  449         kdb_init();
  450 
  451 #ifdef KDB
  452         if (boothowto & RB_KDB)
  453                 kdb_enter("Boot flags requested debugger");
  454 #endif
  455 }
  456 
  457 void
  458 set_openfirm_callback(ofw_vec_t *vec)
  459 {
  460 
  461         ofw_tba = rdpr(tba);
  462         ofw_vec = (u_long)vec;
  463 }
  464 
  465 void
  466 sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code)
  467 {
  468         struct trapframe *tf;
  469         struct sigframe *sfp;
  470         struct sigacts *psp;
  471         struct sigframe sf;
  472         struct thread *td;
  473         struct frame *fp;
  474         struct proc *p;
  475         u_long sp;
  476         int oonstack;
  477         register_t addr;
  478 
  479         oonstack = 0;
  480         td = curthread;
  481         p = td->td_proc;
  482         PROC_LOCK_ASSERT(p, MA_OWNED);
  483         psp = p->p_sigacts;
  484         mtx_assert(&psp->ps_mtx, MA_OWNED);
  485         tf = td->td_frame;
  486         sp = tf->tf_sp + SPOFF;
  487         oonstack = sigonstack(sp);
  488 
  489         CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
  490             catcher, sig);
  491 
  492         /* Make sure we have a signal trampoline to return to. */
  493         if (p->p_md.md_sigtramp == NULL) {
  494                 /*
  495                  * No signal trampoline... kill the process.
  496                  */
  497                 CTR0(KTR_SIG, "sendsig: no sigtramp");
  498                 printf("sendsig: %s is too old, rebuild it\n", p->p_comm);
  499                 sigexit(td, sig);
  500                 /* NOTREACHED */
  501         }
  502 
  503         /* Save user context. */
  504         bzero(&sf, sizeof(sf));
  505         get_mcontext(td, &sf.sf_uc.uc_mcontext, 0);
  506         sf.sf_uc.uc_sigmask = *mask;
  507         sf.sf_uc.uc_stack = td->td_sigstk;
  508         sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ?
  509             ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
  510 
  511         /* Allocate and validate space for the signal handler context. */
  512         if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
  513             SIGISMEMBER(psp->ps_sigonstack, sig)) {
  514                 sfp = (struct sigframe *)(td->td_sigstk.ss_sp +
  515                     td->td_sigstk.ss_size - sizeof(struct sigframe));
  516         } else
  517                 sfp = (struct sigframe *)sp - 1;
  518         mtx_unlock(&psp->ps_mtx);
  519         PROC_UNLOCK(p);
  520 
  521         fp = (struct frame *)sfp - 1;
  522 
  523         /* Translate the signal if appropriate. */
  524         if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize)
  525                 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)];
  526 
  527         /* Build the argument list for the signal handler. */
  528         tf->tf_out[0] = sig;
  529         tf->tf_out[2] = (register_t)&sfp->sf_uc;
  530         tf->tf_out[4] = (register_t)catcher;
  531         if (tf->tf_type == T_DATA_MISS || tf->tf_type == T_DATA_PROTECTION)
  532                 addr = tf->tf_sfar;
  533         else
  534                 addr = tf->tf_tpc;
  535         if (SIGISMEMBER(psp->ps_siginfo, sig)) {
  536                 /* Signal handler installed with SA_SIGINFO. */
  537                 tf->tf_out[1] = (register_t)&sfp->sf_si;
  538 
  539                 /* Fill in POSIX parts. */
  540                 sf.sf_si.si_signo = sig; /* maybe a translated signal */
  541                 sf.sf_si.si_code = code;
  542                 sf.sf_si.si_addr = (void *)addr;
  543         } else {
  544                 /* Old FreeBSD-style arguments. */
  545                 tf->tf_out[1] = code;
  546                 tf->tf_out[3] = addr;
  547         }
  548 
  549         /* Copy the sigframe out to the user's stack. */
  550         if (rwindow_save(td) != 0 || copyout(&sf, sfp, sizeof(*sfp)) != 0 ||
  551             suword(&fp->fr_in[6], tf->tf_out[6]) != 0) {
  552                 /*
  553                  * Something is wrong with the stack pointer.
  554                  * ...Kill the process.
  555                  */
  556                 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp);
  557                 PROC_LOCK(p);
  558                 sigexit(td, SIGILL);
  559                 /* NOTREACHED */
  560         }
  561 
  562         tf->tf_tpc = (u_long)p->p_md.md_sigtramp;
  563         tf->tf_tnpc = tf->tf_tpc + 4;
  564         tf->tf_sp = (u_long)fp - SPOFF;
  565 
  566         CTR3(KTR_SIG, "sendsig: return td=%p pc=%#lx sp=%#lx", td, tf->tf_tpc,
  567             tf->tf_sp);
  568 
  569         PROC_LOCK(p);
  570         mtx_lock(&psp->ps_mtx);
  571 }
  572 
  573 /*
  574  * Build siginfo_t for SA thread
  575  */
  576 void
  577 cpu_thread_siginfo(int sig, u_long code, siginfo_t *si)
  578 {
  579         struct proc *p;
  580         struct thread *td;
  581         struct trapframe *tf;
  582 
  583         td = curthread;
  584         p = td->td_proc;
  585         PROC_LOCK_ASSERT(p, MA_OWNED);
  586         tf = td->td_frame;
  587 
  588         bzero(si, sizeof(*si));
  589         si->si_signo = sig;
  590         si->si_code = code;
  591         if (tf->tf_type == T_DATA_MISS || tf->tf_type == T_DATA_PROTECTION)
  592                 si->si_addr = (void *)tf->tf_sfar;
  593         else
  594                 si->si_addr = (void *)tf->tf_tpc;
  595         /* XXXKSE fill other fields */
  596 }
  597 
  598 #ifndef _SYS_SYSPROTO_H_
  599 struct sigreturn_args {
  600         ucontext_t *ucp;
  601 };
  602 #endif
  603 
  604 /*
  605  * MPSAFE
  606  */
  607 int
  608 sigreturn(struct thread *td, struct sigreturn_args *uap)
  609 {
  610         struct proc *p;
  611         mcontext_t *mc;
  612         ucontext_t uc;
  613         int error;
  614 
  615         p = td->td_proc;
  616         if (rwindow_save(td)) {
  617                 PROC_LOCK(p);
  618                 sigexit(td, SIGILL);
  619         }
  620 
  621         CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
  622         if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
  623                 CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
  624                 return (EFAULT);
  625         }
  626 
  627         mc = &uc.uc_mcontext;
  628         error = set_mcontext(td, mc);
  629         if (error != 0)
  630                 return (error);
  631 
  632         PROC_LOCK(p);
  633         td->td_sigmask = uc.uc_sigmask;
  634         SIG_CANTMASK(td->td_sigmask);
  635         signotify(td);
  636         PROC_UNLOCK(p);
  637 
  638         CTR4(KTR_SIG, "sigreturn: return td=%p pc=%#lx sp=%#lx tstate=%#lx",
  639             td, mc->mc_tpc, mc->mc_sp, mc->mc_tstate);
  640         return (EJUSTRETURN);
  641 }
  642 
  643 #ifdef COMPAT_FREEBSD4
  644 int
  645 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap)
  646 {
  647 
  648         return sigreturn(td, (struct sigreturn_args *)uap);
  649 }
  650 #endif
  651 
  652 /*
  653  * Construct a PCB from a trapframe. This is called from kdb_trap() where
  654  * we want to start a backtrace from the function that caused us to enter
  655  * the debugger. We have the context in the trapframe, but base the trace
  656  * on the PCB. The PCB doesn't have to be perfect, as long as it contains
  657  * enough for a backtrace.
  658  */
  659 void
  660 makectx(struct trapframe *tf, struct pcb *pcb)
  661 {
  662 
  663         pcb->pcb_pc = tf->tf_tpc;
  664         pcb->pcb_sp = tf->tf_sp;
  665 }
  666 
  667 int
  668 get_mcontext(struct thread *td, mcontext_t *mc, int flags)
  669 {
  670         struct trapframe *tf;
  671         struct pcb *pcb;
  672 
  673         tf = td->td_frame;
  674         pcb = td->td_pcb;
  675         bcopy(tf, mc, sizeof(*tf));
  676         if (flags & GET_MC_CLEAR_RET) {
  677                 mc->mc_out[0] = 0;
  678                 mc->mc_out[1] = 0;
  679         }
  680         mc->mc_flags = _MC_VERSION;
  681         critical_enter();
  682         if ((tf->tf_fprs & FPRS_FEF) != 0) {
  683                 savefpctx(pcb->pcb_ufp);
  684                 tf->tf_fprs &= ~FPRS_FEF;
  685                 pcb->pcb_flags |= PCB_FEF;
  686         }
  687         if ((pcb->pcb_flags & PCB_FEF) != 0) {
  688                 bcopy(pcb->pcb_ufp, mc->mc_fp, sizeof(mc->mc_fp));
  689                 mc->mc_fprs |= FPRS_FEF;
  690         }
  691         critical_exit();
  692         return (0);
  693 }
  694 
  695 int
  696 set_mcontext(struct thread *td, const mcontext_t *mc)
  697 {
  698         struct trapframe *tf;
  699         struct pcb *pcb;
  700         uint64_t wstate;
  701 
  702         if (!TSTATE_SECURE(mc->mc_tstate) ||
  703             (mc->mc_flags & ((1L << _MC_VERSION_BITS) - 1)) != _MC_VERSION)
  704                 return (EINVAL);
  705         tf = td->td_frame;
  706         pcb = td->td_pcb;
  707         /* Make sure the windows are spilled first. */
  708         flushw();
  709         wstate = tf->tf_wstate;
  710         bcopy(mc, tf, sizeof(*tf));
  711         tf->tf_wstate = wstate;
  712         if ((mc->mc_fprs & FPRS_FEF) != 0) {
  713                 tf->tf_fprs = 0;
  714                 bcopy(mc->mc_fp, pcb->pcb_ufp, sizeof(pcb->pcb_ufp));
  715                 pcb->pcb_flags |= PCB_FEF;
  716         }
  717         return (0);
  718 }
  719 
  720 /*
  721  * Exit the kernel and execute a firmware call that will not return, as
  722  * specified by the arguments.
  723  */
  724 void
  725 cpu_shutdown(void *args)
  726 {
  727 
  728 #ifdef SMP
  729         cpu_mp_shutdown();
  730 #endif
  731         openfirmware_exit(args);
  732 }
  733 
  734 /* Get current clock frequency for the given CPU ID. */
  735 int
  736 cpu_est_clockrate(int cpu_id, uint64_t *rate)
  737 {
  738 
  739         return (ENXIO);
  740 }
  741 
  742 /*
  743  * Duplicate OF_exit() with a different firmware call function that restores
  744  * the trap table, otherwise a RED state exception is triggered in at least
  745  * some firmware versions.
  746  */
  747 void
  748 cpu_halt(void)
  749 {
  750         static struct {
  751                 cell_t name;
  752                 cell_t nargs;
  753                 cell_t nreturns;
  754         } args = {
  755                 (cell_t)"exit",
  756                 0,
  757                 0
  758         };
  759 
  760         cpu_shutdown(&args);
  761 }
  762 
  763 void
  764 sparc64_shutdown_final(void *dummy, int howto)
  765 {
  766         static struct {
  767                 cell_t name;
  768                 cell_t nargs;
  769                 cell_t nreturns;
  770         } args = {
  771                 (cell_t)"SUNW,power-off",
  772                 0,
  773                 0
  774         };
  775 
  776         /* Turn the power off? */
  777         if ((howto & RB_POWEROFF) != 0)
  778                 cpu_shutdown(&args);
  779         /* In case of halt, return to the firmware */
  780         if ((howto & RB_HALT) != 0)
  781                 cpu_halt();
  782 }
  783 
  784 void
  785 cpu_idle(void)
  786 {
  787 
  788         /* Insert code to halt (until next interrupt) for the idle loop. */
  789 }
  790 
  791 int
  792 ptrace_set_pc(struct thread *td, u_long addr)
  793 {
  794 
  795         td->td_frame->tf_tpc = addr;
  796         td->td_frame->tf_tnpc = addr + 4;
  797         return (0);
  798 }
  799 
  800 int
  801 ptrace_single_step(struct thread *td)
  802 {
  803 
  804         /* TODO; */
  805         return (0);
  806 }
  807 
  808 int
  809 ptrace_clear_single_step(struct thread *td)
  810 {
  811 
  812         /* TODO; */
  813         return (0);
  814 }
  815 
  816 void
  817 exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings)
  818 {
  819         struct trapframe *tf;
  820         struct pcb *pcb;
  821         struct proc *p;
  822         u_long sp;
  823 
  824         /* XXX no cpu_exec */
  825         p = td->td_proc;
  826         p->p_md.md_sigtramp = NULL;
  827         if (p->p_md.md_utrap != NULL) {
  828                 utrap_free(p->p_md.md_utrap);
  829                 p->p_md.md_utrap = NULL;
  830         }
  831 
  832         pcb = td->td_pcb;
  833         tf = td->td_frame;
  834         sp = rounddown(stack, 16);
  835         bzero(pcb, sizeof(*pcb));
  836         bzero(tf, sizeof(*tf));
  837         tf->tf_out[0] = stack;
  838         tf->tf_out[3] = p->p_sysent->sv_psstrings;
  839         tf->tf_out[6] = sp - SPOFF - sizeof(struct frame);
  840         tf->tf_tnpc = entry + 4;
  841         tf->tf_tpc = entry;
  842         tf->tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_MM_TSO;
  843 
  844         td->td_retval[0] = tf->tf_out[0];
  845         td->td_retval[1] = tf->tf_out[1];
  846 }
  847 
  848 int
  849 fill_regs(struct thread *td, struct reg *regs)
  850 {
  851 
  852         bcopy(td->td_frame, regs, sizeof(*regs));
  853         return (0);
  854 }
  855 
  856 int
  857 set_regs(struct thread *td, struct reg *regs)
  858 {
  859         struct trapframe *tf;
  860 
  861         if (!TSTATE_SECURE(regs->r_tstate))
  862                 return (EINVAL);
  863         tf = td->td_frame;
  864         regs->r_wstate = tf->tf_wstate;
  865         bcopy(regs, tf, sizeof(*regs));
  866         return (0);
  867 }
  868 
  869 int
  870 fill_dbregs(struct thread *td, struct dbreg *dbregs)
  871 {
  872 
  873         return (ENOSYS);
  874 }
  875 
  876 int
  877 set_dbregs(struct thread *td, struct dbreg *dbregs)
  878 {
  879 
  880         return (ENOSYS);
  881 }
  882 
  883 int
  884 fill_fpregs(struct thread *td, struct fpreg *fpregs)
  885 {
  886         struct trapframe *tf;
  887         struct pcb *pcb;
  888 
  889         pcb = td->td_pcb;
  890         tf = td->td_frame;
  891         bcopy(pcb->pcb_ufp, fpregs->fr_regs, sizeof(fpregs->fr_regs));
  892         fpregs->fr_fsr = tf->tf_fsr;
  893         fpregs->fr_gsr = tf->tf_gsr;
  894         return (0);
  895 }
  896 
  897 int
  898 set_fpregs(struct thread *td, struct fpreg *fpregs)
  899 {
  900         struct trapframe *tf;
  901         struct pcb *pcb;
  902 
  903         pcb = td->td_pcb;
  904         tf = td->td_frame;
  905         tf->tf_fprs &= ~FPRS_FEF;
  906         bcopy(fpregs->fr_regs, pcb->pcb_ufp, sizeof(pcb->pcb_ufp));
  907         tf->tf_fsr = fpregs->fr_fsr;
  908         tf->tf_gsr = fpregs->fr_gsr;
  909         return (0);
  910 }
  911 
  912 struct md_utrap *
  913 utrap_alloc(void)
  914 {
  915         struct md_utrap *ut;
  916 
  917         ut = malloc(sizeof(struct md_utrap), M_SUBPROC, M_WAITOK | M_ZERO);
  918         ut->ut_refcnt = 1;
  919         return (ut);
  920 }
  921 
  922 void
  923 utrap_free(struct md_utrap *ut)
  924 {
  925         int refcnt;
  926 
  927         if (ut == NULL)
  928                 return;
  929         mtx_pool_lock(mtxpool_sleep, ut);
  930         ut->ut_refcnt--;
  931         refcnt = ut->ut_refcnt;
  932         mtx_pool_unlock(mtxpool_sleep, ut);
  933         if (refcnt == 0)
  934                 free(ut, M_SUBPROC);
  935 }
  936 
  937 struct md_utrap *
  938 utrap_hold(struct md_utrap *ut)
  939 {
  940 
  941         if (ut == NULL)
  942                 return (NULL);
  943         mtx_pool_lock(mtxpool_sleep, ut);
  944         ut->ut_refcnt++;
  945         mtx_pool_unlock(mtxpool_sleep, ut);
  946         return (ut);
  947 }
Cache object: 5feb26fe9bf2d7a3822cab99219f1ad2
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.
FreeBSD/Linux Kernel Cross Reference sys/sparc64/sparc64/machdep.c

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