1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  23  */
  24 
  25 /*
  26  * sun4u common CPC subroutines.
  27  */
  28 
  29 #include <sys/types.h>
  30 #include <sys/time.h>
  31 #include <sys/atomic.h>
  32 #include <sys/thread.h>
  33 #include <sys/regset.h>
  34 #include <sys/archsystm.h>
  35 #include <sys/machsystm.h>
  36 #include <sys/cpc_impl.h>
  37 #include <sys/cpc_ultra.h>
  38 #include <sys/sunddi.h>
  39 #include <sys/intr.h>
  40 #include <sys/ivintr.h>
  41 #include <sys/x_call.h>
  42 #include <sys/cpuvar.h>
  43 #include <sys/machcpuvar.h>
  44 #include <sys/cpc_pcbe.h>
  45 #include <sys/modctl.h>
  46 #include <sys/sdt.h>
  47 
  48 uint64_t        cpc_level15_inum = 0;   /* used in interrupt.s */
  49 int             cpc_has_overflow_intr;  /* set in cheetah.c */
  50 
  51 extern kcpc_ctx_t *kcpc_overflow_intr(caddr_t arg, uint64_t bitmap);
  52 extern int kcpc_counts_include_idle;
  53 
  54 /*
  55  * Called on the boot CPU during startup.
  56  */
  57 void
  58 kcpc_hw_init(void)
  59 {
  60         if ((cpc_has_overflow_intr) && (cpc_level15_inum == 0)) {
  61                 cpc_level15_inum = add_softintr(PIL_15,
  62                     kcpc_hw_overflow_intr, NULL, SOFTINT_MT);
  63         }
  64 
  65         /*
  66          * Make sure the boot CPU gets set up.
  67          */
  68         kcpc_hw_startup_cpu(CPU->cpu_flags);
  69 }
  70 
  71 /*
  72  * Prepare for CPC interrupts and install an idle thread CPC context.
  73  */
  74 void
  75 kcpc_hw_startup_cpu(ushort_t cpflags)
  76 {
  77         cpu_t           *cp = CPU;
  78         kthread_t       *t = cp->cpu_idle_thread;
  79 
  80         ASSERT(t->t_bound_cpu == cp);
  81 
  82         if (cpc_has_overflow_intr && (cpflags & CPU_FROZEN) == 0) {
  83                 int pstate_save = disable_vec_intr();
  84 
  85                 ASSERT(cpc_level15_inum != 0);
  86 
  87                 intr_enqueue_req(PIL_15, cpc_level15_inum);
  88                 enable_vec_intr(pstate_save);
  89         }
  90 
  91         mutex_init(&cp->cpu_cpc_ctxlock, "cpu_cpc_ctxlock", MUTEX_DEFAULT, 0);
  92 
  93         if (kcpc_counts_include_idle)
  94                 return;
  95 
  96         installctx(t, cp, kcpc_idle_save, kcpc_idle_restore, NULL, NULL,
  97             NULL, NULL);
  98 }
  99 
 100 /*
 101  * Examine the processor and load an appropriate PCBE.
 102  */
 103 int
 104 kcpc_hw_load_pcbe(void)
 105 {
 106         char            modname[MODMAXNAMELEN+1];
 107         char            *p, *q;
 108         int             len, stat;
 109         extern char     *boot_cpu_compatible_list;
 110 
 111         for (stat = -1, p = boot_cpu_compatible_list; p != NULL; p = q) {
 112                 /*
 113                  * Get next CPU module name from boot_cpu_compatible_list
 114                  */
 115                 q = strchr(p, ':');
 116                 len = (q) ? (q - p) : strlen(p);
 117                 if (len < sizeof (modname)) {
 118                         (void) strncpy(modname, p, len);
 119                         modname[len] = '\0';
 120                         stat = kcpc_pcbe_tryload(modname, 0, 0, 0);
 121                         if (stat == 0)
 122                                 break;
 123                 }
 124                 if (q)
 125                         q++;                    /* skip over ':' */
 126         }
 127         return (stat);
 128 
 129 }
 130 
 131 /*ARGSUSED*/
 132 int
 133 kcpc_hw_cpu_hook(processorid_t cpuid, ulong_t *kcpc_cpumap)
 134 {
 135         return (0);
 136 }
 137 
 138 int
 139 kcpc_hw_lwp_hook(void)
 140 {
 141         return (0);
 142 }