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


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/i386/i386/mpboot.s

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 1995, Jack F. Vogel
    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  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by Jack F. Vogel
   16  * 4. The name of the developer may be used to endorse or promote products
   17  *    derived from this software without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  * mpboot.s:    FreeBSD machine support for the Intel MP Spec
   32  *              multiprocessor systems.
   33  *
   34  * $FreeBSD: releng/6.0/sys/i386/i386/mpboot.s 139724 2005-01-05 19:10:48Z imp $
   35  */
   36 
   37 #include "opt_pmap.h"
   38 
   39 #include <machine/asmacros.h>           /* miscellaneous asm macros */
   40 #include <machine/apicreg.h>
   41 #include <machine/specialreg.h>
   42 
   43 #include "assym.s"
   44 
   45 #define R(x)    ((x)-KERNBASE)
   46 
   47 /*
   48  * this code MUST be enabled here and in mp_machdep.c
   49  * it follows the very early stages of AP boot by placing values in CMOS ram.
   50  * it NORMALLY will never be needed and thus the primitive method for enabling.
   51  *
   52 #define CHECK_POINTS
   53  */
   54 
   55 #if defined(CHECK_POINTS) && !defined(PC98)
   56 
   57 #define CMOS_REG        (0x70)
   58 #define CMOS_DATA       (0x71)
   59 
   60 #define CHECKPOINT(A,D)         \
   61         movb    $(A),%al ;      \
   62         outb    %al,$CMOS_REG ; \
   63         movb    $(D),%al ;      \
   64         outb    %al,$CMOS_DATA
   65 
   66 #else
   67 
   68 #define CHECKPOINT(A,D)
   69 
   70 #endif /* CHECK_POINTS */
   71 
   72 
   73 /*
   74  * the APs enter here from their trampoline code (bootMP, below)
   75  */
   76         .p2align 4
   77 
   78 NON_GPROF_ENTRY(MPentry)
   79         CHECKPOINT(0x36, 3)
   80         /*
   81          * Enable features on this processor.  We don't support SMP on
   82          * CPUs older than a Pentium, so we know that we can use the cpuid
   83          * instruction.
   84          */
   85         movl    $1,%eax
   86         cpuid                                   /* Retrieve features */
   87         movl    %cr4,%eax
   88 #ifndef DISABLE_PSE
   89         testl   $CPUID_PSE,%edx
   90         jz 1f
   91         orl     $CR4_PSE,%eax                   /* Enable PSE  */
   92 1:
   93 #endif
   94 #ifndef DISABLE_PG_G
   95         testl   $CPUID_PGE,%edx
   96         jz 1f
   97         orl     $CR4_PGE,%eax                   /* Enable PGE  */
   98 1:      
   99 #endif
  100         testl   $CPUID_VME,%edx
  101         jz 1f
  102         orl     $CR4_VME,%eax                   /* Enable VME  */
  103 1:
  104         movl    %eax,%cr4
  105 
  106         /* Now enable paging mode */
  107 #ifdef PAE
  108         movl    R(IdlePDPT), %eax
  109         movl    %eax, %cr3
  110         movl    %cr4, %eax
  111         orl     $CR4_PAE, %eax
  112         movl    %eax, %cr4
  113 #else
  114         movl    R(IdlePTD), %eax
  115         movl    %eax,%cr3       
  116 #endif
  117         movl    %cr0,%eax
  118         orl     $CR0_PE|CR0_PG,%eax             /* enable paging */
  119         movl    %eax,%cr0                       /* let the games begin! */
  120         movl    bootSTK,%esp                    /* boot stack end loc. */
  121 
  122         pushl   $mp_begin                       /* jump to high mem */
  123         ret
  124 
  125         /*
  126          * Wait for the booting CPU to signal startup
  127          */
  128 mp_begin:       /* now running relocated at KERNBASE */
  129         CHECKPOINT(0x37, 4)
  130         call    init_secondary                  /* load i386 tables */
  131 
  132 /*
  133  * This is the embedded trampoline or bootstrap that is
  134  * copied into 'real-mode' low memory, it is where the
  135  * secondary processor "wakes up". When it is executed
  136  * the processor will eventually jump into the routine
  137  * MPentry, which resides in normal kernel text above
  138  * 1Meg.                -jackv
  139  */
  140 
  141         .data
  142         ALIGN_DATA                              /* just to be sure */
  143 
  144 BOOTMP1:
  145 
  146 NON_GPROF_ENTRY(bootMP)
  147         .code16         
  148         cli
  149         CHECKPOINT(0x34, 1)
  150         /* First guarantee a 'clean slate' */
  151         xorl    %eax, %eax
  152         movl    %eax, %ebx
  153         movl    %eax, %ecx
  154         movl    %eax, %edx
  155         movl    %eax, %esi
  156         movl    %eax, %edi
  157 
  158         /* set up data segments */
  159         mov     %cs, %ax
  160         mov     %ax, %ds
  161         mov     %ax, %es
  162         mov     %ax, %fs
  163         mov     %ax, %gs
  164         mov     %ax, %ss
  165         mov     $(boot_stk-bootMP), %esp
  166 
  167         /* Now load the global descriptor table */
  168         lgdt    MP_GDTptr-bootMP
  169 
  170         /* Enable protected mode */
  171         movl    %cr0, %eax
  172         orl     $CR0_PE, %eax
  173         movl    %eax, %cr0 
  174 
  175         /*
  176          * make intrasegment jump to flush the processor pipeline and
  177          * reload CS register
  178          */
  179         pushl   $0x18
  180         pushl   $(protmode-bootMP)
  181         lretl
  182 
  183        .code32          
  184 protmode:
  185         CHECKPOINT(0x35, 2)
  186 
  187         /*
  188          * we are NOW running for the first time with %eip
  189          * having the full physical address, BUT we still
  190          * are using a segment descriptor with the origin
  191          * not matching the booting kernel.
  192          *
  193          * SO NOW... for the BIG Jump into kernel's segment
  194          * and physical text above 1 Meg.
  195          */
  196         mov     $0x10, %ebx
  197         movw    %bx, %ds
  198         movw    %bx, %es
  199         movw    %bx, %fs
  200         movw    %bx, %gs
  201         movw    %bx, %ss
  202 
  203         .globl  bigJump
  204 bigJump:
  205         /* this will be modified by mpInstallTramp() */
  206         ljmp    $0x08, $0                       /* far jmp to MPentry() */
  207         
  208 dead:   hlt /* We should never get here */
  209         jmp     dead
  210 
  211 /*
  212  * MP boot strap Global Descriptor Table
  213  */
  214         .p2align 4
  215         .globl  MP_GDT
  216         .globl  bootCodeSeg
  217         .globl  bootDataSeg
  218 MP_GDT:
  219 
  220 nulldesc:               /* offset = 0x0 */
  221 
  222         .word   0x0     
  223         .word   0x0     
  224         .byte   0x0     
  225         .byte   0x0     
  226         .byte   0x0     
  227         .byte   0x0     
  228 
  229 kernelcode:             /* offset = 0x08 */
  230 
  231         .word   0xffff  /* segment limit 0..15 */
  232         .word   0x0000  /* segment base 0..15 */
  233         .byte   0x0     /* segment base 16..23; set for 0K */
  234         .byte   0x9f    /* flags; Type  */
  235         .byte   0xcf    /* flags; Limit */
  236         .byte   0x0     /* segment base 24..32 */
  237 
  238 kerneldata:             /* offset = 0x10 */
  239 
  240         .word   0xffff  /* segment limit 0..15 */
  241         .word   0x0000  /* segment base 0..15 */
  242         .byte   0x0     /* segment base 16..23; set for 0k */
  243         .byte   0x93    /* flags; Type  */
  244         .byte   0xcf    /* flags; Limit */
  245         .byte   0x0     /* segment base 24..32 */
  246 
  247 bootcode:               /* offset = 0x18 */
  248 
  249         .word   0xffff  /* segment limit 0..15 */
  250 bootCodeSeg:            /* this will be modified by mpInstallTramp() */
  251         .word   0x0000  /* segment base 0..15 */
  252         .byte   0x00    /* segment base 16...23; set for 0x000xx000 */
  253         .byte   0x9e    /* flags; Type  */
  254         .byte   0xcf    /* flags; Limit */
  255         .byte   0x0     /*segment base 24..32 */
  256 
  257 bootdata:               /* offset = 0x20 */
  258 
  259         .word   0xffff  
  260 bootDataSeg:            /* this will be modified by mpInstallTramp() */
  261         .word   0x0000  /* segment base 0..15 */
  262         .byte   0x00    /* segment base 16...23; set for 0x000xx000 */
  263         .byte   0x92    
  264         .byte   0xcf    
  265         .byte   0x0             
  266 
  267 /*
  268  * GDT pointer for the lgdt call
  269  */
  270         .globl  mp_gdtbase
  271 
  272 MP_GDTptr:      
  273 mp_gdtlimit:
  274         .word   0x0028          
  275 mp_gdtbase:             /* this will be modified by mpInstallTramp() */
  276         .long   0
  277 
  278         .space  0x100   /* space for boot_stk - 1st temporary stack */
  279 boot_stk:
  280 
  281 BOOTMP2:
  282         .globl  bootMP_size
  283 bootMP_size:
  284         .long   BOOTMP2 - BOOTMP1

Cache object: aa5fb9dc1be31cd4ad87b33de4d29c98


[ 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.