/* $OpenBSD: mptramp.S,v 1.3 2005/07/26 08:38:29 art Exp $ */
/* $NetBSD: mptramp.S,v 1.1 2003/04/26 18:39:30 fvdl Exp $ */
/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by RedBack Networks Inc.
*
* Author: Bill Sommerfeld
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 1999 Stefan Grefen
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR AND CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* MP startup ...
* the stuff from cpu_spinup_trampoline to mp_startup
* is copied into the first 640 KB
*
* We startup the processors now when the kthreads become ready.
* The steps are:
* 1) Get the processors running kernel-code from a special
* page-table and stack page, do chip identification.
* 2) halt the processors waiting for them to be enabled
* by a idle-thread
*/
#include "assym.h"
#include <machine/param.h>
#include <machine/asm.h>
#include <machine/specialreg.h>
#include <machine/segments.h>
#include <machine/mpbiosvar.h>
#include <machine/i82489reg.h>
#include <machine/gdt.h>
#define _RELOC(x) ((x) - KERNBASE)
#define RELOC(x) _RELOC(_C_LABEL(x))
#define _TRMP_LABEL(a) a = . - _C_LABEL(cpu_spinup_trampoline) + MP_TRAMPOLINE
.globl _C_LABEL(mpidle)
.global _C_LABEL(cpu_spinup_trampoline)
.global _C_LABEL(cpu_spinup_trampoline_end)
.global _C_LABEL(cpu_hatch)
.global _C_LABEL(local_apic)
.global _C_LABEL(mp_pdirpa)
.global gdt64
#define HALT 1: jmp 1b
.text
.align 4,0x0
.code16
_C_LABEL(cpu_spinup_trampoline):
cli
xorw %ax,%ax
movw %ax, %ds
movw %ax, %es
movw %ax, %ss
data32 addr32 lgdt (mptramp_gdt32_desc) # load flat descriptor table
movl %cr0, %eax # get cr0
orl $0x1, %eax # enable protected mode
movl %eax, %cr0 # doit
ljmpl $0x8, $mp_startup
_TRMP_LABEL(mp_startup)
.code32
movl $0x10, %eax # data segment
movw %ax, %ds
movw %ax, %ss
movw %ax, %es
movw %ax, %fs
movw %ax, %gs
movl $ (MP_TRAMPOLINE+NBPG-16),%esp # bootstrap stack end,
# with scratch space..
/* First, reset the PSL. */
pushl $PSL_MBO
popfl
movl %cr4,%eax
orl $(CR4_DEFAULT),%eax
movl %eax,%cr4
movl $MSR_EFER,%ecx
rdmsr
movl %edx, %edi # %edx is needed by wrmsr below
# Check if we need to enable NXE
movl $0x80000001, %eax
cpuid
andl $CPUID_NXE, %edx
xorl %eax,%eax
testl %edx, %edx
jz 1f
orl $EFER_NXE, %eax
1:
orl $(EFER_LME|EFER_SCE), %eax
movl %edi, %edx # Restore saved %edx
movl $MSR_EFER,%ecx
wrmsr
movl $mp_tramp_pdirpa, %ecx
movl (%ecx), %ecx
movl %ecx,%cr3 # load ptd addr into mmu
movl $GSEL(GDATA_SEL, SEL_KPL),%eax #switch to new segment
movl %eax,%ds
movl %eax,%es
movl %eax,%ss
movl $mptramp_gdt64_desc,%eax
lgdt (%eax)
movl $mptramp_jmp64,%eax
movl %cr0,%ecx # get control word
orl $(CR0_PE|CR0_PG|CR0_NE|CR0_TS|CR0_MP|CR0_WP),%ecx
movl %ecx, %cr0
ljmp *(%eax)
_TRMP_LABEL(mptramp_jmp64)
.long mptramp_longmode
.word GSEL(GCODE_SEL, SEL_KPL)
_TRMP_LABEL(mptramp_gdt32)
.quad 0x0000000000000000
.quad 0x00cf9f000000ffff
.quad 0x00cf93000000ffff
_TRMP_LABEL(mptramp_gdt32_desc)
.word 0x17
.long mptramp_gdt32
_TRMP_LABEL(mptramp_gdt64)
.quad 0x0000000000000000
.quad 0x00af9a000000ffff
.quad 0x00cf92000000ffff
_TRMP_LABEL(mptramp_gdt64_desc)
.word 0x17
.long mptramp_gdt64
.global mp_pdirpa
_TRMP_LABEL(mp_pdirpa)
_TRMP_LABEL(mp_tramp_pdirpa)
.long 0
_TRMP_LABEL(mptramp_longmode)
.code64
movabsq $_C_LABEL(cpu_spinup_trampoline_end),%rax
jmp *%rax
_C_LABEL(cpu_spinup_trampoline_end): #end of code copied to MP_TRAMPOLINE
movl _C_LABEL(local_apic)+LAPIC_ID,%ecx
shrl $LAPIC_ID_SHIFT,%ecx
movq _C_LABEL(cpu_info)(,%rcx,8),%rdi
movq CPU_INFO_IDLE_PCB(%rdi),%rsi
movq PCB_RSP(%rsi),%rsp
movq PCB_RBP(%rsi),%rbp
movq CPU_INFO_GDT(%rdi),%rax
movw $(MAXGDTSIZ-1),-10(%rsp)
movq %rax,-8(%rsp)
lgdt -10(%rsp)
/* Switch address space. */
movq PCB_CR3(%rsi),%rax
movq %rax,%cr3
movl PCB_CR0(%rsi),%eax
movq %rax,%cr0
call _C_LABEL(cpu_hatch)
xorq %r13,%r13
jmp _C_LABEL(mpidle)
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