/* $OpenBSD: locore0.S,v 1.1 2017/06/05 18:59:06 deraadt Exp $ */ /* * Copyright (c) 1998-2004 Michael Shalayeff * All rights reserved. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 OR HIS RELATIVES 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 MIND, 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. * * Portitions of this file are derived from other sources, see * the copyrights and acknowledgements below. */ /* * (c) Copyright 1988 HEWLETT-PACKARD COMPANY * * To anyone who acknowledges that this file is provided "AS IS" * without any express or implied warranty: * permission to use, copy, modify, and distribute this file * for any purpose is hereby granted without fee, provided that * the above copyright notice and this notice appears in all * copies, and that the name of Hewlett-Packard Company not be * used in advertising or publicity pertaining to distribution * of the software without specific, written prior permission. * Hewlett-Packard Company makes no representations about the * suitability of this software for any purpose. */ /* * Copyright (c) 1990,1991,1992,1994 The University of Utah and * the Computer Systems Laboratory (CSL). All rights reserved. * * Permission to use, copy, modify and distribute this software is hereby * granted provided that (1) source code retains these copyright, permission, * and disclaimer notices, and (2) redistributions including binaries * reproduce the notices in supporting documentation, and (3) all advertising * materials mentioning features or use of this software display the following * acknowledgement: ``This product includes software developed by the * Computer Systems Laboratory at the University of Utah.'' * * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * CSL requests users of this software to return to csl-dist@cs.utah.edu any * improvements that they make and grant CSL redistribution rights. * * Utah $Hdr: locore.s 1.63 95/01/20$ */ #include <sys/reboot.h> #include <machine/param.h> #include <machine/asm.h> #include <machine/psl.h> #include <machine/trap.h> #include <machine/iomod.h> #include <machine/pdc.h> #include <machine/frame.h> #include <machine/reg.h> #include "assym.h" .import $global$, data .import pdc, data .import boothowto, data .import bootdev, data .import esym, data .import cpu_info, data .import proc0, data .import proc0paddr, data .import proc0fpstate, data #define EMRG_STACKSIZE (1*NBPG) #define FPEMU_STACKSIZE (1*NBPG) .data BSS(pdc_stack, 4) /* temp stack for PDC call */ BSS(emrg_stack, 4) /* stack for HPMC/TOC/PWRF */ .export kernelmapped, data BSS(kernelmapped, 4) /* set when kernel is mapped */ .export fpu_enable, data BSS(fpu_enable, 4) /* bits to set in the ccr to enable fpu */ BSS(cpu_fpuena, 4) /* enable FPU, otherwise force emulate */ BSS(fpu_scratch, 16) /* FPU scratch space, enough for a quad */ .export hppa_vtop, data BSS(hppa_vtop, 4) /* a vtop translation table addr (pa=va) */ .text .import $kernel_setup, entry /* * This is the starting location for the kernel */ ENTRY($start,0) /* * start(pdc, boothowto, bootdev, esym, bootapiver, argv, argc) * * pdc - PDC entry point * boothowto - boot flags (see "reboot.h") * bootdev - boot device (index into bdevsw) * esym - end of symbol table (or &end if not present) * bootapiver - /boot API version * argv - options block passed from /boot * argc - the length of the block */ /* * save the pdc, boothowto, bootdev and esym arguments */ ldil L%pdc,r1 stw arg0,R%pdc(r1) ldil L%boothowto,r1 stw arg1,R%boothowto(r1) ldil L%bootdev,r1 stw arg2,R%bootdev(r1) ldil L%esym,r1 stw arg3,R%esym(r1) /* Align arg3, which is the start of available memory */ ldo NBPG-1(arg3), arg3 dep r0, 31, PGSHIFT, arg3 /* assuming size being page-aligned */ #define STACK_ALLOC(n,s) \ ldil L%(n), t1 ! \ ldil L%(s), t2 ! \ stw arg3, R%(n)(t1) ! \ add arg3, t2, arg3 STACK_ALLOC(pdc_stack, PDC_STACKSIZE) STACK_ALLOC(emrg_stack, EMRG_STACKSIZE) #undef STACK_ALLOC /* zero fake trapframe and proc0 u-area */ copy arg3, t2 ldi NBPG+TRAPFRAME_SIZEOF, t1 $start_zero_tf stws,ma r0, 4(t2) addib,>= -8, t1, $start_zero_tf stws,ma r0, 4(t2) /* XXX could use ,bc here, but gas is broken */ /* * kernel stack lives here (arg3 is page-aligned esym) * initialize the pcb * arg0 will be available space for hppa_init() */ ldo NBPG+TRAPFRAME_SIZEOF(arg3), sp stw r0, U_PCB+PCB_ONFAULT(arg3) stw r0, U_PCB+PCB_SPACE(arg3) /* XXX HPPA_SID_KERNEL == 0 */ ldil L%(USPACE+NBPG), arg0 /* normal U plus red zone */ add arg0, arg3, arg0 ldil L%proc0paddr, t1 stw arg3, R%proc0paddr(t1) ldil L%proc0, t2 stw arg3, R%proc0+P_ADDR(t2) ldo -TRAPFRAME_SIZEOF(sp), t3 stw t3, R%proc0+P_MD_REGS(t2) ldil L%TFF_LAST, t1 stw t1, TF_FLAGS-TRAPFRAME_SIZEOF(sp) ldil L%proc0fpstate, t1 ldo R%proc0fpstate(t1), t1 stw t1, TF_CR30-TRAPFRAME_SIZEOF(sp) mtctl t1, cr30 /* * disable all coprocessors */ mtctl r0, ccr /* Store pointer to cpu_info in CR29. */ ldil L%cpu_info, r1 ldo R%cpu_info(r1), r1 mtctl r1, cr29 #ifdef MULTIPROCESSOR /* Setup SMP rendezvous address. */ ldil L%hw_cpu_spinup_trampoline, r1 ldo R%hw_cpu_spinup_trampoline(r1), r1 stw r1, 0x10(0) /* MEM_RENDEZ */ stw r0, 0x28(0) /* MEM_RENDEZ */ #endif copy sp, arg1 ldil L%$qisnowon, rp ldo R%$qisnowon(rp), rp b $kernel_setup ldi PSL_Q|PSL_I, arg2 $qisnowon /* * call C routine hppa_init() to initialize VM */ ldil L%hppa_init, r1 ldo R%hppa_init(r1), r1 .import hppa_init, code .call blr r0, rp bv,n (r1) nop /* * Cannot change the queues or IPSW with the Q-bit on */ rsm RESET_PSL, r0 nop ! nop ! nop ! nop ! nop ! nop ! nop /* * We need to do an rfi to get the C bit set */ mtctl r0, pcsq mtctl r0, pcsq ldil L%$virtual_mode, t1 ldo R%$virtual_mode(t1), t1 mtctl t1, pcoq ldo 4(t1), t1 mtctl t1, pcoq mfctl r29, t1 ldw CI_PSW(t1), t2 mtctl t2, ipsw rfi nop $virtual_mode ldil L%kernelmapped, t1 stw t1, R%kernelmapped(t1) #ifdef DDB .import db_enter, code /* have to call debugger from here, from virtual mode */ ldil L%boothowto, r1 ldw R%boothowto(r1), r1 bb,>= r1, 25, $noddb nop break HPPA_BREAK_KERNEL, HPPA_BREAK_KGDB $noddb #endif .import main,code ldil L%main, r1 ldo R%main(r1), r1 $callmain .call blr r0, rp bv,n (r1) nop /* should never return... */ bv (rp) nop EXIT($start)
