The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/sentry5/s5_machdep.c

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    1 /*-
    2  * Copyright (c) 2007 Bruce M. Simpson.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/10.1/sys/mips/sentry5/s5_machdep.c 247297 2013-02-26 01:00:11Z attilio $");
   29 
   30 #include "opt_ddb.h"
   31 
   32 #include <sys/param.h>
   33 #include <sys/conf.h>
   34 #include <sys/kernel.h>
   35 #include <sys/systm.h>
   36 #include <sys/imgact.h>
   37 #include <sys/bio.h>
   38 #include <sys/buf.h>
   39 #include <sys/bus.h>
   40 #include <sys/cpu.h>
   41 #include <sys/cons.h>
   42 #include <sys/exec.h>
   43 #include <sys/ucontext.h>
   44 #include <sys/proc.h>
   45 #include <sys/kdb.h>
   46 #include <sys/ptrace.h>
   47 #include <sys/reboot.h>
   48 #include <sys/signalvar.h>
   49 #include <sys/sysent.h>
   50 #include <sys/sysproto.h>
   51 #include <sys/user.h>
   52 
   53 #include <vm/vm.h>
   54 #include <vm/vm_object.h>
   55 #include <vm/vm_page.h>
   56 
   57 #include <machine/cache.h>
   58 #include <machine/clock.h>
   59 #include <machine/cpu.h>
   60 #include <machine/cpuinfo.h>
   61 #include <machine/cpufunc.h>
   62 #include <machine/cpuregs.h>
   63 #include <machine/hwfunc.h>
   64 #include <machine/intr_machdep.h>
   65 #include <machine/locore.h>
   66 #include <machine/md_var.h>
   67 #include <machine/pte.h>
   68 #include <machine/sigframe.h>
   69 #include <machine/trap.h>
   70 #include <machine/vmparam.h>
   71 
   72 #include <mips/sentry5/s5reg.h>
   73 
   74 #ifdef CFE
   75 #include <dev/cfe/cfe_api.h>
   76 #endif
   77 
   78 extern int *edata;
   79 extern int *end;
   80 
   81 void
   82 platform_cpu_init()
   83 {
   84         /* Nothing special */
   85 }
   86 
   87 static void
   88 mips_init(void)
   89 {
   90         int i, j;
   91 
   92         printf("entry: mips_init()\n");
   93 
   94 #ifdef CFE
   95         /*
   96          * Query DRAM memory map from CFE.
   97          */
   98         physmem = 0;
   99         for (i = 0; i < 10; i += 2) {
  100                 int result;
  101                 uint64_t addr, len, type;
  102 
  103                 result = cfe_enummem(i, 0, &addr, &len, &type);
  104                 if (result < 0) {
  105                         phys_avail[i] = phys_avail[i + 1] = 0;
  106                         break;
  107                 }
  108                 if (type != CFE_MI_AVAILABLE)
  109                         continue;
  110 
  111                 phys_avail[i] = addr;
  112                 if (i == 0 && addr == 0) {
  113                         /*
  114                          * If this is the first physical memory segment probed
  115                          * from CFE, omit the region at the start of physical
  116                          * memory where the kernel has been loaded.
  117                          */
  118                         phys_avail[i] += MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
  119                 }
  120                 phys_avail[i + 1] = addr + len;
  121                 physmem += len;
  122         }
  123 
  124         realmem = btoc(physmem);
  125 #endif
  126 
  127         for (j = 0; j < i; j++)
  128                 dump_avail[j] = phys_avail[j];
  129 
  130         physmem = realmem;
  131 
  132         init_param1();
  133         init_param2(physmem);
  134         mips_cpu_init();
  135         pmap_bootstrap();
  136         mips_proc0_init();
  137         mutex_init();
  138         kdb_init();
  139 #ifdef KDB
  140         if (boothowto & RB_KDB)
  141                 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
  142 #endif
  143 }
  144 
  145 void
  146 platform_reset(void)
  147 {
  148 
  149 #if defined(CFE)
  150         cfe_exit(0, 0);
  151 #else
  152         *((volatile uint8_t *)MIPS_PHYS_TO_KSEG1(SENTRY5_EXTIFADR)) = 0x80;
  153 #endif
  154 }
  155 
  156 void
  157 platform_start(__register_t a0, __register_t a1, __register_t a2,
  158                __register_t a3)
  159 {
  160         vm_offset_t kernend;
  161         uint64_t platform_counter_freq;
  162 
  163         /* clear the BSS and SBSS segments */
  164         kernend = (vm_offset_t)&end;
  165         memset(&edata, 0, kernend - (vm_offset_t)(&edata));
  166 
  167         mips_postboot_fixup();
  168 
  169         /* Initialize pcpu stuff */
  170         mips_pcpu0_init();
  171 
  172 #ifdef CFE
  173         /*
  174          * Initialize CFE firmware trampolines before
  175          * we initialize the low-level console.
  176          *
  177          * CFE passes the following values in registers:
  178          * a0: firmware handle
  179          * a2: firmware entry point
  180          * a3: entry point seal
  181          */
  182         if (a3 == CFE_EPTSEAL)
  183                 cfe_init(a0, a2);
  184 #endif
  185         cninit();
  186 
  187         mips_init();
  188 
  189 # if 0
  190         /*
  191          * Probe the Broadcom Sentry5's on-chip PLL clock registers
  192          * and discover the CPU pipeline clock and bus clock
  193          * multipliers from this.
  194          * XXX: Wrong place. You have to ask the ChipCommon
  195          * or External Interface cores on the SiBa.
  196          */
  197         uint32_t busmult, cpumult, refclock, clkcfg1;
  198 #define S5_CLKCFG1_REFCLOCK_MASK        0x0000001F
  199 #define S5_CLKCFG1_BUSMULT_MASK         0x000003E0
  200 #define S5_CLKCFG1_BUSMULT_SHIFT        5
  201 #define S5_CLKCFG1_CPUMULT_MASK         0xFFFFFC00
  202 #define S5_CLKCFG1_CPUMULT_SHIFT        10
  203 
  204         counter_freq = 100000000;       /* XXX */
  205 
  206         clkcfg1 = s5_rd_clkcfg1();
  207         printf("clkcfg1 = 0x%08x\n", clkcfg1);
  208 
  209         refclock = clkcfg1 & 0x1F;
  210         busmult = ((clkcfg1 & 0x000003E0) >> 5) + 1;
  211         cpumult = ((clkcfg1 & 0xFFFFFC00) >> 10) + 1;
  212 
  213         printf("refclock = %u\n", refclock);
  214         printf("busmult = %u\n", busmult);
  215         printf("cpumult = %u\n", cpumult);
  216 
  217         counter_freq = cpumult * refclock;
  218 # else
  219         platform_counter_freq = 200 * 1000 * 1000; /* Sentry5 is 200MHz */
  220 # endif
  221 
  222         mips_timer_init_params(platform_counter_freq, 0);
  223 }

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