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e5295c2487
- Enable KX and UX bits on CPU startup for non-boot CPUs - Keep the KX bit when in userspace - XTLB handler needs it to access PCPU data - revert r210638 partly - we don't need to enable KX on kernel entry now Reviewed by: jmallett, imp
90 lines
2.7 KiB
ArmAsm
90 lines
2.7 KiB
ArmAsm
/*-
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* Copyright (c) 2010 Neelkanth Natu
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY 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 OR 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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* $FreeBSD$
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*/
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#include <machine/asm.h>
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#include <machine/cpu.h>
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#include <machine/cpuregs.h>
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#include "assym.s"
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.text
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.set noat
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.set noreorder
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/* XXX move this to a header file */
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#if defined(CPU_CNMIPS)
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#define CLEAR_STATUS \
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mfc0 a0, MIPS_COP_0_STATUS ;\
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li a2, (MIPS_SR_KX | MIPS_SR_SX | MIPS_SR_UX) ; \
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or a0, a0, a2 ; \
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li a2, ~(MIPS_SR_INT_IE | MIPS_SR_EXL | SR_KSU_USER | MIPS_SR_BEV) ; \
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and a0, a0, a2 ; \
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mtc0 a0, MIPS_COP_0_STATUS
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#elif defined(__mips_n64)
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#define CLEAR_STATUS \
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li a0, (MIPS_SR_KX | MIPS_SR_UX) ; \
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mtc0 a0, MIPS_COP_0_STATUS
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#else
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#define CLEAR_STATUS \
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mtc0 zero, MIPS_COP_0_STATUS
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#endif
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GLOBAL(mpentry)
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CLEAR_STATUS /* disable interrupts */
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mtc0 zero, MIPS_COP_0_CAUSE /* clear soft interrupts */
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li t0, MIPS_CCA_CACHED /* make sure kseg0 is cached */
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mtc0 t0, MIPS_COP_0_CONFIG
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COP0_SYNC
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jal platform_processor_id /* get the processor number */
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nop
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move s0, v0
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/*
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* Initialize stack and call machine startup
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*/
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PTR_LA sp, _C_LABEL(pcpu_space)
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addiu sp, (PAGE_SIZE * 2) - CALLFRAME_SIZ
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sll t0, s0, PAGE_SHIFT + 1
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addu sp, sp, t0
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/* Zero out old ra and old fp for debugger */
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sw zero, CALLFRAME_SIZ - 4(sp)
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sw zero, CALLFRAME_SIZ - 8(sp)
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PTR_LA gp, _C_LABEL(_gp)
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jal platform_init_ap
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move a0, s0
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jal smp_init_secondary
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move a0, s0
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PANIC("AP startup failed!")
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