Renamed to .S, locore.s was split up too.
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/* $NetBSD: mptramp.s,v 1.4 2002/11/11 09:14:10 itohy Exp $ */
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/*-
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* Copyright (c) 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by RedBack Networks Inc.
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*
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* Author: Bill Sommerfeld
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1999 Stefan Grefen
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR AND CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* MP startup ...
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* the stuff from cpu_spinup_trampoline to mp_startup
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* is copied into the first 640 KB
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*
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* We startup the processors now when the kthreads become ready.
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* The steps are:
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* 1) Get the processors running kernel-code from a special
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* page-table and stack page, do chip identification.
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* 2) halt the processors waiting for them to be enabled
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* by a idle-thread
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*/
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#include "opt_mpbios.h" /* for MPDEBUG */
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#include "assym.h"
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#include <machine/param.h>
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#include <machine/asm.h>
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#include <machine/specialreg.h>
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#include <machine/segments.h>
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#include <machine/mpbiosvar.h>
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#include <machine/i82489reg.h>
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#include <machine/gdt.h>
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#define GDTE(a,b) .byte 0xff,0xff,0x0,0x0,0x0,a,b,0x0
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#define _RELOC(x) ((x) - KERNBASE)
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#define RELOC(x) _RELOC(_C_LABEL(x))
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#define _TRMP_LABEL(a) a = . - _C_LABEL(cpu_spinup_trampoline) + MP_TRAMPOLINE
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#ifdef MPDEBUG
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/*
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* Debug code to stop aux. processors in various stages based on the
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* value in cpu_trace.
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*
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* %edi points at cpu_trace; cpu_trace[0] is the "hold point";
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* cpu_trace[1] is the point which the cpu has reached.
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* cpu_trace[2] is the last value stored by HALTT.
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*/
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#define HALT(x) 1: movl (%edi),%ebx;cmpl $ x,%ebx ; jle 1b ; movl $x,4(%edi)
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#define HALTT(x,y) movl y,8(%edi); HALT(x)
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#else
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#define HALT(x) /**/
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#define HALTT(x,y) /**/
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#endif
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.globl _C_LABEL(mpidle)
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.global _C_LABEL(cpu_spinup_trampoline)
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.global _C_LABEL(cpu_spinup_trampoline_end)
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.global _C_LABEL(cpu_hatch)
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.global _C_LABEL(mp_pdirpa)
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.global _C_LABEL(local_apic)
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.text
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.align 4,0x0
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.code16
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_C_LABEL(cpu_spinup_trampoline):
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cli
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xorw %ax,%ax
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movw %ax, %ds
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movw %ax, %es
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movw %ax, %ss
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data32 addr32 lgdt (gdt_desc) # load flat descriptor table
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movl %cr0, %eax # get cr0
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orl $0x1, %eax # enable protected mode
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movl %eax, %cr0 # doit
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movl $0x10, %eax # data segment
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movw %ax, %ds
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movw %ax, %ss
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movw %ax, %es
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movw %ax, %fs
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movw %ax, %gs
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ljmpl $0x8, $mp_startup
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.code32
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_TRMP_LABEL(mp_startup)
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movl $ (MP_TRAMPOLINE+NBPG-16),%esp # bootstrap stack end,
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# with scratch space..
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#ifdef MPDEBUG
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leal RELOC(cpu_trace),%edi
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#endif
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HALT(0x1)
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/* First, reset the PSL. */
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pushl $PSL_MBO
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popfl
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movl RELOC(mp_pdirpa),%ecx
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HALTT(0x5,%ecx)
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/* Load base of page directory and enable mapping. */
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movl %ecx,%cr3 # load ptd addr into mmu
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movl %cr0,%eax # get control word
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# enable paging & NPX emulation
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orl $(CR0_PE|CR0_PG|CR0_NE|CR0_TS|CR0_EM|CR0_MP|CR0_WP),%eax
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movl %eax,%cr0 # and let's page NOW!
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#ifdef MPDEBUG
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leal _C_LABEL(cpu_trace),%edi
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#endif
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HALT(0x6)
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# ok, we're now running with paging enabled and sharing page tables with cpu0.
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# figure out which processor we really are, what stack we should be on, etc.
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movl _C_LABEL(local_apic)+LAPIC_ID,%ecx
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shrl $LAPIC_ID_SHIFT,%ecx
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leal 0(,%ecx,4),%ecx
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movl _C_LABEL(cpu_info)(%ecx),%ecx
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HALTT(0x7, %ecx)
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# %ecx points at our cpu_info structure..
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movw $((MAXGDTSIZ*8) - 1), 6(%esp) # prepare segment descriptor
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movl CPU_INFO_GDT(%ecx), %eax # for our real gdt
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movl %eax, 8(%esp)
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lgdt 6(%esp)
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HALT(0x8)
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jmp 1f
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nop
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1:
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HALT(0x12)
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movl $GSEL(GDATA_SEL, SEL_KPL),%eax #switch to new segment
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movl %eax,%ds
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movl %eax,%es
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movl %eax,%ss
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HALT(0x13)
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pushl $GSEL(GCODE_SEL, SEL_KPL)
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pushl $mp_cont
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HALT(0x14)
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lret
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.align 4,0x0
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_TRMP_LABEL(gdt_table)
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.word 0x0,0x0,0x0,0x0 # null GDTE
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GDTE(0x9f,0xcf) # Kernel text
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GDTE(0x93,0xcf) # Kernel data
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_TRMP_LABEL(gdt_desc)
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.word 0x17 # limit 3 entries
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.long gdt_table # base of gdt
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_C_LABEL(cpu_spinup_trampoline_end): #end of code copied to MP_TRAMPOLINE
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mp_cont:
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HALT(0x15)
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movl CPU_INFO_IDLE_PCB(%ecx),%esi
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# %esi now points at our PCB.
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HALTT(0x19, %esi)
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movl PCB_ESP(%esi),%esp
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movl PCB_EBP(%esi),%ebp
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HALT(0x20)
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/* Switch address space. */
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movl PCB_CR3(%esi),%eax
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HALTT(0x22, %eax)
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movl %eax,%cr3
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HALT(0x25)
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/* load segment registers. */
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movl $GSEL(GCPU_SEL, SEL_KPL),%eax
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HALTT(0x26,%eax)
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movl %eax,%fs
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xorl %eax,%eax
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HALTT(0x27,%eax)
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movl %eax,%gs
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movl PCB_CR0(%esi),%eax
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HALTT(0x28,%eax)
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movl %eax,%cr0
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HALTT(0x30,%ecx)
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pushl %ecx
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call _C_LABEL(cpu_hatch)
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HALT(0x33)
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xorl %esi,%esi
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jmp _C_LABEL(mpidle)
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.data
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_C_LABEL(mp_pdirpa):
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.long 0
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#ifdef MPDEBUG
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.global _C_LABEL(cpu_trace)
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_C_LABEL(cpu_trace):
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.long 0x40
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.long 0xff
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.long 0xff
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#endif
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