c3e289e1ce
Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
370 lines
8.8 KiB
ArmAsm
370 lines
8.8 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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#define OFWSTKSZ 4096 /* 4K Open Firmware 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(ofwstk)
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.space OFWSTKSZ
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GLOBAL(esym)
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.llong 0 /* end of symbol table */
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GLOBAL(ofmsr)
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.llong 0, 0, 0, 0, 0 /* msr/sprg0-3 used in Open Firmware */
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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(eintrnames)
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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(eintrcnt)
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/*
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* File-scope for locore.S
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*/
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idle_u:
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.llong 0 /* fake uarea during idle after exit */
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openfirmware_entry:
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.llong 0 /* Open Firmware entry point */
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srsave:
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.llong 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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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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ASENTRY(__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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/* 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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std 5,openfirmware_entry@l(8) /* save client interface handler */
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/* Set up the stack pointer */
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lis 1,(tmpstk+TMPSTKSZ-48)@ha
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addi 1,1,(tmpstk+TMPSTKSZ-48)@l
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/* Set up the TOC pointer */
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lis 2,tocbase@ha
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ld 2,tocbase@l(2)
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mfmsr 0
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lis 9,ofmsr@ha
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stdu 0,ofmsr@l(9)
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mfsprg0 0 /* save SPRG0-3 */
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std 0,8(9) /* ofmsr[1] = sprg0 */
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mfsprg1 0
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std 0,16(9) /* ofmsr[2] = sprg1 */
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mfsprg2 0
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std 0,24(9) /* ofmsr[3] = sprg2 */
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mfsprg3 0
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std 0,32(9) /* ofmsr[4] = sprg3 */
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/* Switch to 64-bit mode */
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mfmsr 9
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li 8,1
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insrdi 9,8,1,0
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mtmsrd 9
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bl .OF_initial_setup
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nop
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lis 4,end@ha
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addi 4,4,end@l
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mr 5,4
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lis 3,kernbase@ha
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addi 3,3,kernbase@l
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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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nop
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mr %r1, %r3
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li %r3, 0
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std %r3, 0(%r1)
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bl .mi_startup
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nop
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b .OF_exit
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nop
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/*
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* PPC64 ABI TOC base
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*/
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.align 3
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.globl tocbase
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tocbase:
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.llong .TOC.@tocbase
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/*
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* Open Firmware Real-mode Entry Point. This is a huge pain.
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*/
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ASENTRY(ofw_32bit_mode_entry)
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mflr %r0
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std %r0,16(%r1)
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stdu %r1,-208(%r1)
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/*
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* We need to save the following, because OF's register save/
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* restore code assumes that the contents of registers are
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* at most 32 bits wide: lr, cr, r2, r13-r31, the old MSR. These
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* get placed in that order in the stack.
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*/
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mfcr %r4
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std %r4,48(%r1)
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std %r13,56(%r1)
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std %r14,64(%r1)
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std %r15,72(%r1)
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std %r16,80(%r1)
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std %r17,88(%r1)
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std %r18,96(%r1)
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std %r19,104(%r1)
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std %r20,112(%r1)
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std %r21,120(%r1)
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std %r22,128(%r1)
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std %r23,136(%r1)
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std %r24,144(%r1)
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std %r25,152(%r1)
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std %r26,160(%r1)
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std %r27,168(%r1)
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std %r28,176(%r1)
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std %r29,184(%r1)
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std %r30,192(%r1)
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std %r31,200(%r1)
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/* Record the old MSR */
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mfmsr %r6
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/* read client interface handler */
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lis %r4,openfirmware_entry@ha
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ld %r4,openfirmware_entry@l(%r4)
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/*
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* Set the MSR to the OF value. This has the side effect of disabling
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* exceptions, which is important for the next few steps.
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*/
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lis %r5,ofmsr@ha
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ld %r5,ofmsr@l(%r5)
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mtmsrd %r5
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isync
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/*
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* Set up OF stack. This needs to be accessible in real mode and
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* use the 32-bit ABI stack frame format. The pointer to the current
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* kernel stack is placed at the very top of the stack along with
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* the old MSR so we can get them back later.
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*/
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mr %r5,%r1
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lis %r1,(ofwstk+OFWSTKSZ-32)@ha
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addi %r1,%r1,(ofwstk+OFWSTKSZ-32)@l
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std %r5,8(%r1) /* Save real stack pointer */
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std %r2,16(%r1) /* Save old TOC */
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std %r6,24(%r1) /* Save old MSR */
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li %r5,0
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stw %r5,4(%r1)
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stw %r5,0(%r1)
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/* Finally, branch to OF */
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mtctr %r4
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bctrl
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/* Reload stack pointer and MSR from the OFW stack */
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ld %r6,24(%r1)
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ld %r2,16(%r1)
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ld %r1,8(%r1)
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/* Now set the real MSR */
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mtmsrd %r6
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isync
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/* Sign-extend the return value from OF */
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extsw %r3,%r3
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/* Restore all the non-volatile registers */
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ld %r5,48(%r1)
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mtcr %r5
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ld %r13,56(%r1)
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ld %r14,64(%r1)
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ld %r15,72(%r1)
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ld %r16,80(%r1)
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ld %r17,88(%r1)
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ld %r18,96(%r1)
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ld %r19,104(%r1)
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ld %r20,112(%r1)
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ld %r21,120(%r1)
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ld %r22,128(%r1)
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ld %r23,136(%r1)
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ld %r24,144(%r1)
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ld %r25,152(%r1)
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ld %r26,160(%r1)
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ld %r27,168(%r1)
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ld %r28,176(%r1)
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ld %r29,184(%r1)
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ld %r30,192(%r1)
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ld %r31,200(%r1)
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/* Restore the stack and link register */
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ld %r1,0(%r1)
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ld %r0,16(%r1)
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mtlr %r0
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blr
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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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ASENTRY(setfault)
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mflr 0
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mfcr 12
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mfsprg 4,0
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ld 4,PC_CURTHREAD(4)
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ld 4,TD_PCB(4)
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std 3,PCB_ONFAULT(4)
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std 0,0(3)
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std 1,8(3)
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std 2,16(3)
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std %r12,24(%r3) /* Save the non-volatile GP regs. */
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std %r13,24+1*8(%r3)
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std %r14,24+2*8(%r3)
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std %r15,24+3*8(%r3)
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std %r16,24+4*8(%r3)
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std %r17,24+5*8(%r3)
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std %r18,24+6*8(%r3)
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std %r19,24+7*8(%r3)
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std %r20,24+8*8(%r3)
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std %r21,24+9*8(%r3)
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std %r22,24+10*8(%r3)
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std %r23,24+11*8(%r3)
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std %r24,24+12*8(%r3)
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std %r25,24+13*8(%r3)
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std %r26,24+14*8(%r3)
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std %r27,24+15*8(%r3)
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std %r28,24+16*8(%r3)
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std %r29,24+17*8(%r3)
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std %r30,24+18*8(%r3)
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std %r31,24+19*8(%r3)
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xor 3,3,3
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blr
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#include <powerpc/aim/trap_subr64.S>
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