0381f4905f
relative to the start address (unless the start address is 0, which is not the case). This is currently not a problem because all powerpc architectures are using loader(8) which passes metadata to the kernel including the correct `endkernel' address. If we don't use loader(8), register 4 and 5 will have the size of the kernel ELF file, not its end address. We fix that simply by adding `kernel_text' to `end' to compute `endkernel'. Discussed with: nathanw
209 lines
5.6 KiB
ArmAsm
209 lines
5.6 KiB
ArmAsm
/* $FreeBSD$ */
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/* $NetBSD: locore.S,v 1.24 2000/05/31 05:09:17 thorpej Exp $ */
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/*-
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* Copyright (C) 2001 Benno Rice
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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 Benno Rice ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (C) 1995, 1996 Wolfgang Solfrank.
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* Copyright (C) 1995, 1996 TooLs GmbH.
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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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* 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 TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "assym.s"
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#include <sys/syscall.h>
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#include <machine/trap.h>
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#include <machine/param.h>
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#include <machine/spr.h>
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#include <machine/asm.h>
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/* Locate the per-CPU data structure */
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#define GET_CPUINFO(r) \
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mfsprg0 r
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/*
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* Compiled KERNBASE location and the kernel load address
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*/
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.globl kernbase
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.set kernbase, KERNBASE
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#define TMPSTKSZ 8192 /* 8K temporary stack */
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/*
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* Globals
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*/
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.data
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.align 4
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GLOBAL(tmpstk)
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.space TMPSTKSZ
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GLOBAL(esym)
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.long 0 /* end of symbol table */
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#define INTRCNT_COUNT 256 /* max(HROWPIC_IRQMAX,OPENPIC_IRQMAX) */
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GLOBAL(intrnames)
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.space INTRCNT_COUNT * (MAXCOMLEN + 1) * 2
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GLOBAL(sintrnames)
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.long INTRCNT_COUNT * (MAXCOMLEN + 1) * 2
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.align 4
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GLOBAL(intrcnt)
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.space INTRCNT_COUNT * 4 * 2
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GLOBAL(sintrcnt)
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.long INTRCNT_COUNT * 4 * 2
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.text
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.globl btext
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btext:
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/*
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* This symbol is here for the benefit of kvm_mkdb, and is supposed to
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* mark the start of kernel text.
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*/
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.globl kernel_text
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kernel_text:
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/*
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* Startup entry. Note, this must be the first thing in the text
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* segment!
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*/
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.text
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.globl __start
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__start:
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li 8,0
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li 9,0x100
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mtctr 9
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1:
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dcbf 0,8
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icbi 0,8
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addi 8,8,0x20
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bdnz 1b
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sync
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isync
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/* Zero bss, in case we were started by something unhelpful */
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li 0,0
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lis 8,_edata@ha
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addi 8,8,_edata@l
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lis 9,_end@ha
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addi 9,9,_end@l
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2: stw 0,0(8)
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addi 8,8,4
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cmplw 8,9
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blt 2b
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/* Save the argument pointer and length */
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mr 20,6
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mr 21,7
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lis 8,openfirmware_entry@ha
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stw 5,openfirmware_entry@l(8) /* save client interface handler */
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lis 1,(tmpstk+TMPSTKSZ-16)@ha
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addi 1,1,(tmpstk+TMPSTKSZ-16)@l
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mfmsr 0
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lis 9,ofmsr@ha
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stwu 0,ofmsr@l(9)
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mfsprg0 0 /* save SPRG0-3 */
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stw 0,4(9) /* ofmsr[1] = sprg0 */
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mfsprg1 0
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stw 0,8(9) /* ofmsr[2] = sprg1 */
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mfsprg2 0
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stw 0,12(9) /* ofmsr[3] = sprg2 */
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mfsprg3 0
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stw 0,16(9) /* ofmsr[4] = sprg3 */
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bl OF_initial_setup
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lis 3,kernel_text@ha
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addi 3,3,kernel_text@l
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lis 4,end@ha
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addi 4,4,end@l
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add 4,4,3
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mr 5,4
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/* Restore the argument pointer and length */
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mr 6,20
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mr 7,21
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bl powerpc_init
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mr %r1, %r3
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li %r3, 0
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stw %r3, 0(%r1)
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bl mi_startup
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b OF_exit
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/*
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* int setfault()
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*
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* Similar to setjmp to setup for handling faults on accesses to user memory.
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* Any routine using this may only call bcopy, either the form below,
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* or the (currently used) C code optimized, so it doesn't use any non-volatile
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* registers.
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*/
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.globl setfault
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setfault:
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mflr 0
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mfcr 12
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mfsprg 4,0
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lwz 4,TD_PCB(2) /* curthread = r2 */
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stw 3,PCB_ONFAULT(4)
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stw 0,0(3)
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stw 1,4(3)
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stw 2,8(3)
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stmw 12,12(3)
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xor 3,3,3
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blr
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#include <powerpc/aim/trap_subr32.S>
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