dc9b124d66
Summary: The Freescale e500v2 PowerPC core does not use a standard FPU. Instead, it uses a Signal Processing Engine (SPE)--a DSP-style vector processor unit, which doubles as a FPU. The PowerPC SPE ABI is incompatible with the stock powerpc ABI, so a new MACHINE_ARCH was created to deal with this. Additionaly, the SPE opcodes overlap with Altivec, so these are mutually exclusive. Taking advantage of this fact, a new file, powerpc/booke/spe.c, was created with the same function set as in powerpc/powerpc/altivec.c, so it becomes effectively a drop-in replacement. setjmp/longjmp were modified to save the upper 32-bits of the now-64-bit GPRs (upper 32-bits are only accessible by the SPE). Note: This does _not_ support the SPE in the e500v1, as the e500v1 SPE does not support double-precision floating point. Also, without a new MACHINE_ARCH it would be impossible to provide binary packages which utilize the SPE. Additionally, no work has been done to support ports, work is needed for this. This also means no newer gcc can yet be used. However, gcc's powerpc support has been refactored which would make adding a powerpcspe-freebsd target very easy. Test Plan: This was lightly tested on a RouterBoard RB800 and an AmigaOne A1222 (P1022-based) board, compiled against the new ABI. Base system utilities (/bin/sh, /bin/ls, etc) still function appropriately, the system is able to boot multiuser. Reviewed By: bdrewery, imp Relnotes: yes Differential Revision: https://reviews.freebsd.org/D5683
118 lines
3.2 KiB
ArmAsm
118 lines
3.2 KiB
ArmAsm
/*-
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* Copyright (c) 2016 Justin Hibbits
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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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/* $NetBSD: _setjmp.S,v 1.1 1997/03/29 20:55:53 thorpej Exp $ */
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#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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/*
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* C library -- _setjmp, _longjmp
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*
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* _longjmp(a,v)
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* will generate a "return(v?v:1)" from the last call to
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* _setjmp(a)
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* by restoring registers from the stack.
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* The previous signal state is NOT restored.
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*
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* jmpbuf layout:
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* +------------+
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* | unused |
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* +------------+
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* | unused |
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* | |
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* | (4 words) |
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* | |
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* +------------+
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* | saved regs |
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* | ... |
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*/
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ENTRY(_setjmp)
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mflr %r11
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mfcr %r12
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evstdd %r1,24+0*8(%r3)
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evstdd %r2,24+1*8(%r3)
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evstdd %r11,24+2*8(%r3)
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evstdd %r12,24+3*8(%r3)
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evstdd %r13,24+4*8(%r3)
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evstdd %r14,24+5*8(%r3)
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evstdd %r15,24+6*8(%r3)
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evstdd %r16,24+7*8(%r3)
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evstdd %r17,24+8*8(%r3)
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evstdd %r18,24+9*8(%r3)
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evstdd %r19,24+10*8(%r3)
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evstdd %r20,24+11*8(%r3)
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evstdd %r21,24+12*8(%r3)
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evstdd %r22,24+13*8(%r3)
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evstdd %r23,24+14*8(%r3)
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evstdd %r24,24+15*8(%r3)
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evstdd %r25,24+16*8(%r3)
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evstdd %r26,24+17*8(%r3)
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evstdd %r27,24+18*8(%r3)
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evstdd %r28,24+19*8(%r3)
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evstdd %r29,24+20*8(%r3)
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evstdd %r30,24+21*8(%r3)
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evstdd %r31,24+22*8(%r3)
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li %r3,0
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blr
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END(_setjmp)
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ENTRY(_longjmp)
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evldd %r1,24+0*8(%r3)
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evldd %r2,24+1*8(%r3)
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evldd %r11,24+2*8(%r3)
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evldd %r12,24+3*8(%r3)
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evldd %r13,24+4*8(%r3)
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evldd %r14,24+5*8(%r3)
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evldd %r15,24+6*8(%r3)
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evldd %r16,24+7*8(%r3)
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evldd %r17,24+8*8(%r3)
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evldd %r18,24+9*8(%r3)
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evldd %r19,24+10*8(%r3)
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evldd %r20,24+11*8(%r3)
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evldd %r21,24+12*8(%r3)
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evldd %r22,24+13*8(%r3)
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evldd %r23,24+14*8(%r3)
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evldd %r24,24+15*8(%r3)
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evldd %r25,24+16*8(%r3)
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evldd %r26,24+17*8(%r3)
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evldd %r27,24+18*8(%r3)
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evldd %r28,24+19*8(%r3)
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evldd %r29,24+20*8(%r3)
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evldd %r30,24+21*8(%r3)
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evldd %r31,24+22*8(%r3)
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mtlr %r11
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mtcr %r12
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or. %r3,%r4,%r4
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bnelr
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li %r3,1
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blr
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END(_longjmp)
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.section .note.GNU-stack,"",%progbits
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