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/mips/mpboot.S

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    1 /*-
    2  * Copyright (c) 2010 Neelkanth Natu
    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  * $FreeBSD: stable/8/sys/mips/mips/mpboot.S 215938 2010-11-27 12:26:40Z jchandra $
   27  */
   28 
   29 #include <machine/asm.h>
   30 #include <machine/cpu.h>
   31 #include <machine/cpuregs.h>
   32 
   33 #include "assym.s"
   34 
   35         .text
   36         .set    noat
   37         .set    noreorder
   38 
   39 /* XXX move this to a header file */
   40 #if defined(CPU_CNMIPS)
   41 #define CLEAR_STATUS \
   42         mfc0    a0, MIPS_COP_0_STATUS   ;\
   43         li      a2, (MIPS_SR_KX | MIPS_SR_SX | MIPS_SR_UX) ; \
   44         or      a0, a0, a2              ; \
   45         li      a2, ~(MIPS_SR_INT_IE | MIPS_SR_EXL | SR_KSU_USER | MIPS_SR_BEV) ; \
   46         and     a0, a0, a2              ; \
   47         mtc0    a0, MIPS_COP_0_STATUS
   48 #elif defined(__mips_n64)
   49 #define CLEAR_STATUS \
   50         li      a0, (MIPS_SR_KX | MIPS_SR_UX) ; \
   51         mtc0    a0, MIPS_COP_0_STATUS
   52 #else
   53 #define CLEAR_STATUS \
   54         mtc0    zero, MIPS_COP_0_STATUS
   55 #endif
   56 
   57 GLOBAL(mpentry)
   58         CLEAR_STATUS                    /* disable interrupts */
   59 
   60         mtc0    zero, MIPS_COP_0_CAUSE  /* clear soft interrupts */
   61 
   62         li      t0, MIPS_CCA_CACHED     /* make sure kseg0 is cached */
   63         mtc0    t0, MIPS_COP_0_CONFIG
   64         COP0_SYNC
   65 
   66         jal     platform_processor_id   /* get the processor number */
   67         nop
   68         move    s0, v0
   69 
   70         /*
   71          * Initialize stack and call machine startup
   72          */
   73         PTR_LA  sp, _C_LABEL(pcpu_space)
   74         addiu   sp, (PAGE_SIZE * 2) - CALLFRAME_SIZ
   75         sll     t0, s0, PAGE_SHIFT + 1
   76         addu    sp, sp, t0
   77 
   78         /* Zero out old ra and old fp for debugger */
   79         sw      zero, CALLFRAME_SIZ - 4(sp)
   80         sw      zero, CALLFRAME_SIZ - 8(sp)
   81 
   82         PTR_LA  gp, _C_LABEL(_gp)
   83 
   84         jal     platform_init_ap
   85         move    a0, s0
   86         jal     smp_init_secondary
   87         move    a0, s0
   88 
   89         PANIC("AP startup failed!")

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